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neovim/src/nvim/fileio.c

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// This is an open source non-commercial project. Dear PVS-Studio, please check
// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
// fileio.c: read from and write to a file
#include <assert.h>
#include <errno.h>
#include <stdbool.h>
#include <string.h>
#include <inttypes.h>
#include <fcntl.h>
#include "nvim/vim.h"
#include "nvim/api/private/handle.h"
#include "nvim/ascii.h"
#include "nvim/fileio.h"
#include "nvim/buffer.h"
#include "nvim/change.h"
#include "nvim/charset.h"
#include "nvim/cursor.h"
#include "nvim/diff.h"
#include "nvim/edit.h"
#include "nvim/eval/userfunc.h"
#include "nvim/ex_cmds.h"
#include "nvim/ex_docmd.h"
#include "nvim/ex_eval.h"
#include "nvim/fold.h"
#include "nvim/func_attr.h"
#include "nvim/getchar.h"
#include "nvim/hashtab.h"
#include "nvim/iconv.h"
#include "nvim/mbyte.h"
#include "nvim/memfile.h"
#include "nvim/memline.h"
#include "nvim/memory.h"
#include "nvim/message.h"
#include "nvim/misc1.h"
#include "nvim/garray.h"
#include "nvim/move.h"
#include "nvim/normal.h"
#include "nvim/option.h"
#include "nvim/os_unix.h"
#include "nvim/path.h"
#include "nvim/quickfix.h"
#include "nvim/regexp.h"
#include "nvim/screen.h"
#include "nvim/search.h"
#include "nvim/sha256.h"
#include "nvim/state.h"
#include "nvim/strings.h"
#include "nvim/ui.h"
#include "nvim/ui_compositor.h"
#include "nvim/types.h"
#include "nvim/undo.h"
#include "nvim/window.h"
#include "nvim/shada.h"
#include "nvim/os/os.h"
#include "nvim/os/os_defs.h"
#include "nvim/os/time.h"
#include "nvim/os/input.h"
#define BUFSIZE 8192 /* size of normal write buffer */
#define SMBUFSIZE 256 /* size of emergency write buffer */
// For compatibility with libuv < 1.20.0 (tested on 1.18.0)
#ifndef UV_FS_COPYFILE_FICLONE
#define UV_FS_COPYFILE_FICLONE 0
#endif
//
// The autocommands are stored in a list for each event.
// Autocommands for the same pattern, that are consecutive, are joined
// together, to avoid having to match the pattern too often.
// The result is an array of Autopat lists, which point to AutoCmd lists:
//
// last_autopat[0] -----------------------------+
// V
// first_autopat[0] --> Autopat.next --> Autopat.next --> NULL
// Autopat.cmds Autopat.cmds
// | |
// V V
// AutoCmd.next AutoCmd.next
// | |
// V V
// AutoCmd.next NULL
// |
// V
// NULL
//
// last_autopat[1] --------+
// V
// first_autopat[1] --> Autopat.next --> NULL
// Autopat.cmds
// |
// V
// AutoCmd.next
// |
// V
// NULL
// etc.
//
// The order of AutoCmds is important, this is the order in which they were
// defined and will have to be executed.
//
typedef struct AutoCmd {
char_u *cmd; // Command to be executed (NULL when
// command has been removed)
bool once; // "One shot": removed after execution
char nested; // If autocommands nest here
char last; // last command in list
sctx_T script_ctx; // script context where defined
struct AutoCmd *next; // Next AutoCmd in list
} AutoCmd;
typedef struct AutoPat {
struct AutoPat *next; // next AutoPat in AutoPat list; MUST
// be the first entry
char_u *pat; // pattern as typed (NULL when pattern
// has been removed)
regprog_T *reg_prog; // compiled regprog for pattern
AutoCmd *cmds; // list of commands to do
int group; // group ID
int patlen; // strlen() of pat
int buflocal_nr; // !=0 for buffer-local AutoPat
char allow_dirs; // Pattern may match whole path
char last; // last pattern for apply_autocmds()
} AutoPat;
///
/// Struct used to keep status while executing autocommands for an event.
///
typedef struct AutoPatCmd {
AutoPat *curpat; // next AutoPat to examine
AutoCmd *nextcmd; // next AutoCmd to execute
int group; // group being used
char_u *fname; // fname to match with
char_u *sfname; // sfname to match with
char_u *tail; // tail of fname
event_T event; // current event
int arg_bufnr; // initially equal to <abuf>, set to zero when
// buf is deleted
struct AutoPatCmd *next; // chain of active apc-s for auto-invalidation
} AutoPatCmd;
#define AUGROUP_DEFAULT -1 /* default autocmd group */
#define AUGROUP_ERROR -2 /* erroneous autocmd group */
#define AUGROUP_ALL -3 /* all autocmd groups */
#define HAS_BW_FLAGS
#define FIO_LATIN1 0x01 /* convert Latin1 */
#define FIO_UTF8 0x02 /* convert UTF-8 */
#define FIO_UCS2 0x04 /* convert UCS-2 */
#define FIO_UCS4 0x08 /* convert UCS-4 */
#define FIO_UTF16 0x10 /* convert UTF-16 */
#define FIO_ENDIAN_L 0x80 /* little endian */
#define FIO_NOCONVERT 0x2000 /* skip encoding conversion */
#define FIO_UCSBOM 0x4000 /* check for BOM at start of file */
#define FIO_ALL -1 /* allow all formats */
/* When converting, a read() or write() may leave some bytes to be converted
* for the next call. The value is guessed... */
#define CONV_RESTLEN 30
/* We have to guess how much a sequence of bytes may expand when converting
* with iconv() to be able to allocate a buffer. */
#define ICONV_MULT 8
/*
* Structure to pass arguments from buf_write() to buf_write_bytes().
*/
struct bw_info {
int bw_fd; // file descriptor
char_u *bw_buf; // buffer with data to be written
int bw_len; // length of data
#ifdef HAS_BW_FLAGS
int bw_flags; // FIO_ flags
#endif
char_u bw_rest[CONV_RESTLEN]; // not converted bytes
int bw_restlen; // nr of bytes in bw_rest[]
int bw_first; // first write call
char_u *bw_conv_buf; // buffer for writing converted chars
int bw_conv_buflen; // size of bw_conv_buf
int bw_conv_error; // set for conversion error
linenr_T bw_conv_error_lnum; // first line with error or zero
linenr_T bw_start_lnum; // line number at start of buffer
# ifdef HAVE_ICONV
iconv_t bw_iconv_fd; // descriptor for iconv() or -1
# endif
};
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "fileio.c.generated.h"
#endif
static char *e_auchangedbuf = N_(
"E812: Autocommands changed buffer or buffer name");
// Set by the apply_autocmds_group function if the given event is equal to
// EVENT_FILETYPE. Used by the readfile function in order to determine if
// EVENT_BUFREADPOST triggered the EVENT_FILETYPE.
//
// Relying on this value requires one to reset it prior calling
// apply_autocmds_group.
static bool au_did_filetype INIT(= false);
void filemess(buf_T *buf, char_u *name, char_u *s, int attr)
{
int msg_scroll_save;
if (msg_silent != 0) {
return;
}
add_quoted_fname((char *)IObuff, IOSIZE - 80, buf, (const char *)name);
xstrlcat((char *)IObuff, (const char *)s, IOSIZE);
// For the first message may have to start a new line.
// For further ones overwrite the previous one, reset msg_scroll before
// calling filemess().
msg_scroll_save = msg_scroll;
if (shortmess(SHM_OVERALL) && !exiting && p_verbose == 0)
msg_scroll = FALSE;
if (!msg_scroll) /* wait a bit when overwriting an error msg */
check_for_delay(FALSE);
msg_start();
msg_scroll = msg_scroll_save;
msg_scrolled_ign = TRUE;
/* may truncate the message to avoid a hit-return prompt */
msg_outtrans_attr(msg_may_trunc(FALSE, IObuff), attr);
msg_clr_eos();
ui_flush();
msg_scrolled_ign = FALSE;
}
static AutoPat *last_autopat[NUM_EVENTS] = {
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
};
/*
* Read lines from file "fname" into the buffer after line "from".
*
* 1. We allocate blocks with try_malloc, as big as possible.
* 2. Each block is filled with characters from the file with a single read().
* 3. The lines are inserted in the buffer with ml_append().
*
* (caller must check that fname != NULL, unless READ_STDIN is used)
*
* "lines_to_skip" is the number of lines that must be skipped
* "lines_to_read" is the number of lines that are appended
* When not recovering lines_to_skip is 0 and lines_to_read MAXLNUM.
*
* flags:
* READ_NEW starting to edit a new buffer
* READ_FILTER reading filter output
* READ_STDIN read from stdin instead of a file
* READ_BUFFER read from curbuf instead of a file (converting after reading
* stdin)
* READ_DUMMY read into a dummy buffer (to check if file contents changed)
* READ_KEEP_UNDO don't clear undo info or read it from a file
* READ_FIFO read from fifo/socket instead of a file
*
* return FAIL for failure, NOTDONE for directory (failure), or OK
*/
int
readfile(
char_u *fname,
char_u *sfname,
linenr_T from,
linenr_T lines_to_skip,
linenr_T lines_to_read,
exarg_T *eap, // can be NULL!
int flags
)
{
int fd = 0;
int newfile = (flags & READ_NEW);
int check_readonly;
int filtering = (flags & READ_FILTER);
int read_stdin = (flags & READ_STDIN);
int read_buffer = (flags & READ_BUFFER);
int read_fifo = (flags & READ_FIFO);
int set_options = newfile || read_buffer
|| (eap != NULL && eap->read_edit);
linenr_T read_buf_lnum = 1; /* next line to read from curbuf */
colnr_T read_buf_col = 0; /* next char to read from this line */
char_u c;
linenr_T lnum = from;
char_u *ptr = NULL; /* pointer into read buffer */
char_u *buffer = NULL; /* read buffer */
char_u *new_buffer = NULL; /* init to shut up gcc */
char_u *line_start = NULL; /* init to shut up gcc */
int wasempty; /* buffer was empty before reading */
colnr_T len;
long size = 0;
uint8_t *p = NULL;
off_T filesize = 0;
int skip_read = false;
context_sha256_T sha_ctx;
int read_undo_file = false;
linenr_T linecnt;
int error = FALSE; /* errors encountered */
int ff_error = EOL_UNKNOWN; /* file format with errors */
long linerest = 0; /* remaining chars in line */
int perm = 0;
#ifdef UNIX
int swap_mode = -1; /* protection bits for swap file */
#endif
int fileformat = 0; // end-of-line format
bool keep_fileformat = false;
FileInfo file_info;
int file_readonly;
linenr_T skip_count = 0;
linenr_T read_count = 0;
int msg_save = msg_scroll;
linenr_T read_no_eol_lnum = 0; // non-zero lnum when last line of
// last read was missing the eol
bool file_rewind = false;
int can_retry;
linenr_T conv_error = 0; // line nr with conversion error
linenr_T illegal_byte = 0; // line nr with illegal byte
bool keep_dest_enc = false; // don't retry when char doesn't fit
// in destination encoding
int bad_char_behavior = BAD_REPLACE;
/* BAD_KEEP, BAD_DROP or character to
* replace with */
char_u *tmpname = NULL; /* name of 'charconvert' output file */
int fio_flags = 0;
char_u *fenc; // fileencoding to use
bool fenc_alloced; // fenc_next is in allocated memory
char_u *fenc_next = NULL; // next item in 'fencs' or NULL
bool advance_fenc = false;
long real_size = 0;
# ifdef HAVE_ICONV
iconv_t iconv_fd = (iconv_t)-1; // descriptor for iconv() or -1
int did_iconv = false; // TRUE when iconv() failed and trying
// 'charconvert' next
# endif
int converted = FALSE; /* TRUE if conversion done */
int notconverted = FALSE; /* TRUE if conversion wanted but it
wasn't possible */
char_u conv_rest[CONV_RESTLEN];
int conv_restlen = 0; /* nr of bytes in conv_rest[] */
buf_T *old_curbuf;
char_u *old_b_ffname;
char_u *old_b_fname;
int using_b_ffname;
int using_b_fname;
au_did_filetype = false; // reset before triggering any autocommands
curbuf->b_no_eol_lnum = 0; /* in case it was set by the previous read */
/*
* If there is no file name yet, use the one for the read file.
* BF_NOTEDITED is set to reflect this.
* Don't do this for a read from a filter.
* Only do this when 'cpoptions' contains the 'f' flag.
*/
if (curbuf->b_ffname == NULL
&& !filtering
&& fname != NULL
&& vim_strchr(p_cpo, CPO_FNAMER) != NULL
&& !(flags & READ_DUMMY)) {
if (set_rw_fname(fname, sfname) == FAIL)
return FAIL;
}
/* Remember the initial values of curbuf, curbuf->b_ffname and
* curbuf->b_fname to detect whether they are altered as a result of
* executing nasty autocommands. Also check if "fname" and "sfname"
* point to one of these values. */
old_curbuf = curbuf;
old_b_ffname = curbuf->b_ffname;
old_b_fname = curbuf->b_fname;
using_b_ffname = (fname == curbuf->b_ffname)
|| (sfname == curbuf->b_ffname);
using_b_fname = (fname == curbuf->b_fname) || (sfname == curbuf->b_fname);
/* After reading a file the cursor line changes but we don't want to
* display the line. */
ex_no_reprint = TRUE;
/* don't display the file info for another buffer now */
need_fileinfo = FALSE;
// For Unix: Use the short file name whenever possible.
// Avoids problems with networks and when directory names are changed.
// Don't do this for Windows, a "cd" in a sub-shell may have moved us to
// another directory, which we don't detect.
if (sfname == NULL) {
sfname = fname;
}
#if defined(UNIX)
fname = sfname;
#endif
/*
* The BufReadCmd and FileReadCmd events intercept the reading process by
* executing the associated commands instead.
*/
if (!filtering && !read_stdin && !read_buffer) {
pos_T pos;
pos = curbuf->b_op_start;
/* Set '[ mark to the line above where the lines go (line 1 if zero). */
curbuf->b_op_start.lnum = ((from == 0) ? 1 : from);
curbuf->b_op_start.col = 0;
if (newfile) {
if (apply_autocmds_exarg(EVENT_BUFREADCMD, NULL, sfname,
false, curbuf, eap)) {
int status = OK;
if (aborting()) {
status = FAIL;
}
// The BufReadCmd code usually uses ":read" to get the text and
// perhaps ":file" to change the buffer name. But we should
// consider this to work like ":edit", thus reset the
// BF_NOTEDITED flag. Then ":write" will work to overwrite the
// same file.
if (status == OK) {
curbuf->b_flags &= ~BF_NOTEDITED;
}
return status;
}
} else if (apply_autocmds_exarg(EVENT_FILEREADCMD, sfname, sfname,
false, NULL, eap)) {
return aborting() ? FAIL : OK;
}
curbuf->b_op_start = pos;
}
if ((shortmess(SHM_OVER) || curbuf->b_help) && p_verbose == 0)
msg_scroll = FALSE; /* overwrite previous file message */
else
msg_scroll = TRUE; /* don't overwrite previous file message */
/*
* If the name is too long we might crash further on, quit here.
*/
if (fname != NULL && *fname != NUL) {
if (STRLEN(fname) >= MAXPATHL) {
filemess(curbuf, fname, (char_u *)_("Illegal file name"), 0);
msg_end();
msg_scroll = msg_save;
return FAIL;
}
}
if (!read_buffer && !read_stdin && !read_fifo) {
perm = os_getperm((const char *)fname);
#ifdef UNIX
// On Unix it is possible to read a directory, so we have to
// check for it before os_open().
if (perm >= 0 && !S_ISREG(perm) // not a regular file ...
# ifdef S_ISFIFO
&& !S_ISFIFO(perm) // ... or fifo
# endif
# ifdef S_ISSOCK
&& !S_ISSOCK(perm) // ... or socket
# endif
# ifdef OPEN_CHR_FILES
&& !(S_ISCHR(perm) && is_dev_fd_file(fname))
// ... or a character special file named /dev/fd/<n>
# endif
) {
if (S_ISDIR(perm)) {
filemess(curbuf, fname, (char_u *)_("is a directory"), 0);
} else {
filemess(curbuf, fname, (char_u *)_("is not a file"), 0);
}
msg_end();
msg_scroll = msg_save;
return S_ISDIR(perm) ? NOTDONE : FAIL;
}
#endif
}
/* Set default or forced 'fileformat' and 'binary'. */
set_file_options(set_options, eap);
/*
* When opening a new file we take the readonly flag from the file.
* Default is r/w, can be set to r/o below.
* Don't reset it when in readonly mode
* Only set/reset b_p_ro when BF_CHECK_RO is set.
*/
check_readonly = (newfile && (curbuf->b_flags & BF_CHECK_RO));
if (check_readonly && !readonlymode)
curbuf->b_p_ro = FALSE;
if (newfile && !read_stdin && !read_buffer && !read_fifo) {
// Remember time of file.
if (os_fileinfo((char *)fname, &file_info)) {
buf_store_file_info(curbuf, &file_info);
curbuf->b_mtime_read = curbuf->b_mtime;
#ifdef UNIX
/*
* Use the protection bits of the original file for the swap file.
* This makes it possible for others to read the name of the
* edited file from the swapfile, but only if they can read the
* edited file.
* Remove the "write" and "execute" bits for group and others
* (they must not write the swapfile).
* Add the "read" and "write" bits for the user, otherwise we may
* not be able to write to the file ourselves.
* Setting the bits is done below, after creating the swap file.
*/
swap_mode = (file_info.stat.st_mode & 0644) | 0600;
#endif
} else {
curbuf->b_mtime = 0;
curbuf->b_mtime_read = 0;
curbuf->b_orig_size = 0;
curbuf->b_orig_mode = 0;
}
/* Reset the "new file" flag. It will be set again below when the
* file doesn't exist. */
curbuf->b_flags &= ~(BF_NEW | BF_NEW_W);
}
// Check readonly.
file_readonly = false;
if (!read_buffer && !read_stdin) {
if (!newfile || readonlymode || !(perm & 0222)
|| !os_file_is_writable((char *)fname)) {
file_readonly = true;
}
fd = os_open((char *)fname, O_RDONLY, 0);
}
if (fd < 0) { // cannot open at all
msg_scroll = msg_save;
#ifndef UNIX
// On non-unix systems we can't open a directory, check here.
if (os_isdir(fname)) {
filemess(curbuf, sfname, (char_u *)_("is a directory"), 0);
curbuf->b_p_ro = true; // must use "w!" now
} else {
#endif
if (!newfile) {
return FAIL;
}
if (perm == UV_ENOENT) { // check if the file exists
// Set the 'new-file' flag, so that when the file has
// been created by someone else, a ":w" will complain.
curbuf->b_flags |= BF_NEW;
/* Create a swap file now, so that other Vims are warned
* that we are editing this file. Don't do this for a
* "nofile" or "nowrite" buffer type. */
if (!bt_dontwrite(curbuf)) {
check_need_swap(newfile);
/* SwapExists autocommand may mess things up */
if (curbuf != old_curbuf
|| (using_b_ffname
&& (old_b_ffname != curbuf->b_ffname))
|| (using_b_fname
&& (old_b_fname != curbuf->b_fname))) {
EMSG(_(e_auchangedbuf));
return FAIL;
}
}
if (dir_of_file_exists(fname)) {
filemess(curbuf, sfname, (char_u *)new_file_message(), 0);
} else {
filemess(curbuf, sfname, (char_u *)_("[New DIRECTORY]"), 0);
}
// Even though this is a new file, it might have been
// edited before and deleted. Get the old marks.
check_marks_read();
// Set forced 'fileencoding'.
if (eap != NULL) {
set_forced_fenc(eap);
}
apply_autocmds_exarg(EVENT_BUFNEWFILE, sfname, sfname,
false, curbuf, eap);
// remember the current fileformat
save_file_ff(curbuf);
if (aborting()) /* autocmds may abort script processing */
return FAIL;
return OK; /* a new file is not an error */
} else {
filemess(curbuf, sfname, (char_u *)(
(fd == UV_EFBIG) ? _("[File too big]") :
# if defined(UNIX) && defined(EOVERFLOW)
// libuv only returns -errno in Unix and in Windows open() does not
// set EOVERFLOW
(fd == -EOVERFLOW) ? _("[File too big]") :
# endif
_("[Permission Denied]")), 0);
curbuf->b_p_ro = TRUE; /* must use "w!" now */
}
return FAIL;
}
#ifndef UNIX
}
#endif
/*
* Only set the 'ro' flag for readonly files the first time they are
* loaded. Help files always get readonly mode
*/
if ((check_readonly && file_readonly) || curbuf->b_help)
curbuf->b_p_ro = TRUE;
if (set_options) {
/* Don't change 'eol' if reading from buffer as it will already be
* correctly set when reading stdin. */
if (!read_buffer) {
curbuf->b_p_eol = TRUE;
curbuf->b_start_eol = TRUE;
}
curbuf->b_p_bomb = FALSE;
curbuf->b_start_bomb = FALSE;
}
/* Create a swap file now, so that other Vims are warned that we are
* editing this file.
* Don't do this for a "nofile" or "nowrite" buffer type. */
if (!bt_dontwrite(curbuf)) {
check_need_swap(newfile);
if (!read_stdin
&& (curbuf != old_curbuf
|| (using_b_ffname && (old_b_ffname != curbuf->b_ffname))
|| (using_b_fname && (old_b_fname != curbuf->b_fname)))) {
EMSG(_(e_auchangedbuf));
if (!read_buffer) {
close(fd);
}
return FAIL;
}
#ifdef UNIX
// Set swap file protection bits after creating it.
if (swap_mode > 0 && curbuf->b_ml.ml_mfp != NULL
&& curbuf->b_ml.ml_mfp->mf_fname != NULL) {
const char *swap_fname = (const char *)curbuf->b_ml.ml_mfp->mf_fname;
// If the group-read bit is set but not the world-read bit, then
// the group must be equal to the group of the original file. If
// we can't make that happen then reset the group-read bit. This
// avoids making the swap file readable to more users when the
// primary group of the user is too permissive.
if ((swap_mode & 044) == 040) {
FileInfo swap_info;
if (os_fileinfo(swap_fname, &swap_info)
&& file_info.stat.st_gid != swap_info.stat.st_gid
&& os_fchown(curbuf->b_ml.ml_mfp->mf_fd, -1, file_info.stat.st_gid)
== -1) {
swap_mode &= 0600;
}
}
(void)os_setperm(swap_fname, swap_mode);
}
#endif
}
// If "Quit" selected at ATTENTION dialog, don't load the file.
if (swap_exists_action == SEA_QUIT) {
if (!read_buffer && !read_stdin)
close(fd);
return FAIL;
}
++no_wait_return; /* don't wait for return yet */
/*
* Set '[ mark to the line above where the lines go (line 1 if zero).
*/
curbuf->b_op_start.lnum = ((from == 0) ? 1 : from);
curbuf->b_op_start.col = 0;
int try_mac = (vim_strchr(p_ffs, 'm') != NULL);
int try_dos = (vim_strchr(p_ffs, 'd') != NULL);
int try_unix = (vim_strchr(p_ffs, 'x') != NULL);
if (!read_buffer) {
int m = msg_scroll;
int n = msg_scrolled;
// The file must be closed again, the autocommands may want to change
// the file before reading it.
if (!read_stdin) {
close(fd); // ignore errors
}
// The output from the autocommands should not overwrite anything and
// should not be overwritten: Set msg_scroll, restore its value if no
// output was done.
msg_scroll = true;
if (filtering) {
apply_autocmds_exarg(EVENT_FILTERREADPRE, NULL, sfname,
false, curbuf, eap);
} else if (read_stdin) {
apply_autocmds_exarg(EVENT_STDINREADPRE, NULL, sfname,
false, curbuf, eap);
} else if (newfile) {
apply_autocmds_exarg(EVENT_BUFREADPRE, NULL, sfname,
false, curbuf, eap);
} else {
apply_autocmds_exarg(EVENT_FILEREADPRE, sfname, sfname,
false, NULL, eap);
}
// autocommands may have changed it
try_mac = (vim_strchr(p_ffs, 'm') != NULL);
try_dos = (vim_strchr(p_ffs, 'd') != NULL);
try_unix = (vim_strchr(p_ffs, 'x') != NULL);
if (msg_scrolled == n) {
msg_scroll = m;
}
if (aborting()) { /* autocmds may abort script processing */
--no_wait_return;
msg_scroll = msg_save;
curbuf->b_p_ro = TRUE; /* must use "w!" now */
return FAIL;
}
/*
* Don't allow the autocommands to change the current buffer.
* Try to re-open the file.
*
* Don't allow the autocommands to change the buffer name either
* (cd for example) if it invalidates fname or sfname.
*/
if (!read_stdin && (curbuf != old_curbuf
|| (using_b_ffname && (old_b_ffname != curbuf->b_ffname))
|| (using_b_fname && (old_b_fname != curbuf->b_fname))
|| (fd = os_open((char *)fname, O_RDONLY, 0)) < 0)) {
--no_wait_return;
msg_scroll = msg_save;
if (fd < 0)
EMSG(_("E200: *ReadPre autocommands made the file unreadable"));
else
EMSG(_("E201: *ReadPre autocommands must not change current buffer"));
curbuf->b_p_ro = TRUE; /* must use "w!" now */
return FAIL;
}
}
/* Autocommands may add lines to the file, need to check if it is empty */
wasempty = (curbuf->b_ml.ml_flags & ML_EMPTY);
if (!recoverymode && !filtering && !(flags & READ_DUMMY)) {
if (!read_stdin && !read_buffer) {
filemess(curbuf, sfname, (char_u *)"", 0);
}
}
msg_scroll = FALSE; /* overwrite the file message */
/*
* Set linecnt now, before the "retry" caused by a wrong guess for
* fileformat, and after the autocommands, which may change them.
*/
linecnt = curbuf->b_ml.ml_line_count;
/* "++bad=" argument. */
if (eap != NULL && eap->bad_char != 0) {
bad_char_behavior = eap->bad_char;
if (set_options)
curbuf->b_bad_char = eap->bad_char;
} else
curbuf->b_bad_char = 0;
/*
* Decide which 'encoding' to use or use first.
*/
if (eap != NULL && eap->force_enc != 0) {
fenc = enc_canonize(eap->cmd + eap->force_enc);
fenc_alloced = true;
keep_dest_enc = true;
} else if (curbuf->b_p_bin) {
fenc = (char_u *)""; // binary: don't convert
fenc_alloced = false;
} else if (curbuf->b_help) {
// Help files are either utf-8 or latin1. Try utf-8 first, if this
// fails it must be latin1.
// It is needed when the first line contains non-ASCII characters.
// That is only in *.??x files.
fenc_next = (char_u *)"latin1";
fenc = (char_u *)"utf-8";
fenc_alloced = false;
} else if (*p_fencs == NUL) {
fenc = curbuf->b_p_fenc; // use format from buffer
fenc_alloced = false;
} else {
fenc_next = p_fencs; // try items in 'fileencodings'
fenc = next_fenc(&fenc_next, &fenc_alloced);
}
/*
* Jump back here to retry reading the file in different ways.
* Reasons to retry:
* - encoding conversion failed: try another one from "fenc_next"
* - BOM detected and fenc was set, need to setup conversion
* - "fileformat" check failed: try another
*
* Variables set for special retry actions:
* "file_rewind" Rewind the file to start reading it again.
* "advance_fenc" Advance "fenc" using "fenc_next".
* "skip_read" Re-use already read bytes (BOM detected).
* "did_iconv" iconv() conversion failed, try 'charconvert'.
* "keep_fileformat" Don't reset "fileformat".
*
* Other status indicators:
* "tmpname" When != NULL did conversion with 'charconvert'.
* Output file has to be deleted afterwards.
* "iconv_fd" When != -1 did conversion with iconv().
*/
retry:
if (file_rewind) {
if (read_buffer) {
read_buf_lnum = 1;
read_buf_col = 0;
} else if (read_stdin || vim_lseek(fd, (off_T)0L, SEEK_SET) != 0) {
// Can't rewind the file, give up.
error = true;
goto failed;
}
// Delete the previously read lines.
while (lnum > from) {
ml_delete(lnum--, false);
}
file_rewind = false;
if (set_options) {
curbuf->b_p_bomb = FALSE;
curbuf->b_start_bomb = FALSE;
}
conv_error = 0;
}
/*
* When retrying with another "fenc" and the first time "fileformat"
* will be reset.
*/
if (keep_fileformat) {
keep_fileformat = false;
} else {
if (eap != NULL && eap->force_ff != 0) {
fileformat = get_fileformat_force(curbuf, eap);
try_unix = try_dos = try_mac = FALSE;
} else if (curbuf->b_p_bin)
fileformat = EOL_UNIX; /* binary: use Unix format */
else if (*p_ffs == NUL)
fileformat = get_fileformat(curbuf); /* use format from buffer */
else
fileformat = EOL_UNKNOWN; /* detect from file */
}
# ifdef HAVE_ICONV
if (iconv_fd != (iconv_t)-1) {
/* aborted conversion with iconv(), close the descriptor */
iconv_close(iconv_fd);
iconv_fd = (iconv_t)-1;
}
# endif
if (advance_fenc) {
/*
* Try the next entry in 'fileencodings'.
*/
advance_fenc = false;
if (eap != NULL && eap->force_enc != 0) {
/* Conversion given with "++cc=" wasn't possible, read
* without conversion. */
notconverted = TRUE;
conv_error = 0;
if (fenc_alloced)
xfree(fenc);
fenc = (char_u *)"";
fenc_alloced = false;
} else {
if (fenc_alloced)
xfree(fenc);
if (fenc_next != NULL) {
fenc = next_fenc(&fenc_next, &fenc_alloced);
} else {
fenc = (char_u *)"";
fenc_alloced = false;
}
}
if (tmpname != NULL) {
os_remove((char *)tmpname); // delete converted file
XFREE_CLEAR(tmpname);
}
}
/*
* Conversion may be required when the encoding of the file is different
* from 'encoding' or 'encoding' is UTF-16, UCS-2 or UCS-4.
*/
fio_flags = 0;
converted = need_conversion(fenc);
if (converted) {
/* "ucs-bom" means we need to check the first bytes of the file
* for a BOM. */
if (STRCMP(fenc, ENC_UCSBOM) == 0)
fio_flags = FIO_UCSBOM;
/*
* Check if UCS-2/4 or Latin1 to UTF-8 conversion needs to be
* done. This is handled below after read(). Prepare the
* fio_flags to avoid having to parse the string each time.
* Also check for Unicode to Latin1 conversion, because iconv()
* appears not to handle this correctly. This works just like
* conversion to UTF-8 except how the resulting character is put in
* the buffer.
*/
else if (enc_utf8 || STRCMP(p_enc, "latin1") == 0)
fio_flags = get_fio_flags(fenc);
# ifdef HAVE_ICONV
// Try using iconv() if we can't convert internally.
if (fio_flags == 0
&& !did_iconv
) {
iconv_fd = (iconv_t)my_iconv_open(
enc_utf8 ? (char_u *)"utf-8" : p_enc, fenc);
}
# endif
/*
* Use the 'charconvert' expression when conversion is required
* and we can't do it internally or with iconv().
*/
if (fio_flags == 0 && !read_stdin && !read_buffer && *p_ccv != NUL
&& !read_fifo
# ifdef HAVE_ICONV
&& iconv_fd == (iconv_t)-1
# endif
) {
# ifdef HAVE_ICONV
did_iconv = false;
# endif
/* Skip conversion when it's already done (retry for wrong
* "fileformat"). */
if (tmpname == NULL) {
tmpname = readfile_charconvert(fname, fenc, &fd);
if (tmpname == NULL) {
// Conversion failed. Try another one.
advance_fenc = true;
if (fd < 0) {
/* Re-opening the original file failed! */
EMSG(_("E202: Conversion made file unreadable!"));
error = TRUE;
goto failed;
}
goto retry;
}
}
} else {
if (fio_flags == 0
# ifdef HAVE_ICONV
&& iconv_fd == (iconv_t)-1
# endif
) {
/* Conversion wanted but we can't.
* Try the next conversion in 'fileencodings' */
advance_fenc = true;
goto retry;
}
}
}
/* Set "can_retry" when it's possible to rewind the file and try with
* another "fenc" value. It's FALSE when no other "fenc" to try, reading
* stdin or fixed at a specific encoding. */
can_retry = (*fenc != NUL && !read_stdin && !keep_dest_enc && !read_fifo);
if (!skip_read) {
linerest = 0;
filesize = 0;
skip_count = lines_to_skip;
read_count = lines_to_read;
conv_restlen = 0;
read_undo_file = (newfile && (flags & READ_KEEP_UNDO) == 0
&& curbuf->b_ffname != NULL
&& curbuf->b_p_udf
&& !filtering
&& !read_fifo
&& !read_stdin
&& !read_buffer);
if (read_undo_file)
sha256_start(&sha_ctx);
}
while (!error && !got_int) {
/*
* We allocate as much space for the file as we can get, plus
* space for the old line plus room for one terminating NUL.
* The amount is limited by the fact that read() only can read
* up to max_unsigned characters (and other things).
*/
{
if (!skip_read) {
size = 0x10000L; /* use buffer >= 64K */
for (; size >= 10; size /= 2) {
new_buffer = verbose_try_malloc((size_t)size + (size_t)linerest + 1);
if (new_buffer) {
break;
}
}
if (new_buffer == NULL) {
error = TRUE;
break;
}
if (linerest) /* copy characters from the previous buffer */
memmove(new_buffer, ptr - linerest, (size_t)linerest);
xfree(buffer);
buffer = new_buffer;
ptr = buffer + linerest;
line_start = buffer;
/* May need room to translate into.
* For iconv() we don't really know the required space, use a
* factor ICONV_MULT.
* latin1 to utf-8: 1 byte becomes up to 2 bytes
* utf-16 to utf-8: 2 bytes become up to 3 bytes, 4 bytes
* become up to 4 bytes, size must be multiple of 2
* ucs-2 to utf-8: 2 bytes become up to 3 bytes, size must be
* multiple of 2
* ucs-4 to utf-8: 4 bytes become up to 6 bytes, size must be
* multiple of 4 */
real_size = (int)size;
# ifdef HAVE_ICONV
if (iconv_fd != (iconv_t)-1) {
size = size / ICONV_MULT;
} else {
# endif
if (fio_flags & FIO_LATIN1) {
size = size / 2;
} else if (fio_flags & (FIO_UCS2 | FIO_UTF16)) {
size = (size * 2 / 3) & ~1;
} else if (fio_flags & FIO_UCS4) {
size = (size * 2 / 3) & ~3;
} else if (fio_flags == FIO_UCSBOM) {
size = size / ICONV_MULT; // worst case
}
# ifdef HAVE_ICONV
}
# endif
if (conv_restlen > 0) {
// Insert unconverted bytes from previous line.
memmove(ptr, conv_rest, conv_restlen); // -V614
ptr += conv_restlen;
size -= conv_restlen;
}
if (read_buffer) {
/*
* Read bytes from curbuf. Used for converting text read
* from stdin.
*/
if (read_buf_lnum > from)
size = 0;
else {
int n, ni;
long tlen;
tlen = 0;
for (;; ) {
p = ml_get(read_buf_lnum) + read_buf_col;
n = (int)STRLEN(p);
if ((int)tlen + n + 1 > size) {
/* Filled up to "size", append partial line.
* Change NL to NUL to reverse the effect done
* below. */
n = (int)(size - tlen);
for (ni = 0; ni < n; ++ni) {
if (p[ni] == NL)
ptr[tlen++] = NUL;
else
ptr[tlen++] = p[ni];
}
read_buf_col += n;
break;
} else {
/* Append whole line and new-line. Change NL
* to NUL to reverse the effect done below. */
for (ni = 0; ni < n; ++ni) {
if (p[ni] == NL)
ptr[tlen++] = NUL;
else
ptr[tlen++] = p[ni];
}
ptr[tlen++] = NL;
read_buf_col = 0;
if (++read_buf_lnum > from) {
/* When the last line didn't have an
* end-of-line don't add it now either. */
if (!curbuf->b_p_eol)
--tlen;
size = tlen;
break;
}
}
}
}
} else {
/*
* Read bytes from the file.
*/
size = read_eintr(fd, ptr, size);
}
if (size <= 0) {
if (size < 0) /* read error */
error = TRUE;
else if (conv_restlen > 0) {
/*
* Reached end-of-file but some trailing bytes could
* not be converted. Truncated file?
*/
/* When we did a conversion report an error. */
if (fio_flags != 0
# ifdef HAVE_ICONV
|| iconv_fd != (iconv_t)-1
# endif
) {
if (can_retry)
goto rewind_retry;
if (conv_error == 0)
conv_error = curbuf->b_ml.ml_line_count
- linecnt + 1;
}
/* Remember the first linenr with an illegal byte */
else if (illegal_byte == 0)
illegal_byte = curbuf->b_ml.ml_line_count
- linecnt + 1;
if (bad_char_behavior == BAD_DROP) {
*(ptr - conv_restlen) = NUL;
conv_restlen = 0;
} else {
/* Replace the trailing bytes with the replacement
* character if we were converting; if we weren't,
* leave the UTF8 checking code to do it, as it
* works slightly differently. */
if (bad_char_behavior != BAD_KEEP && (fio_flags != 0
# ifdef HAVE_ICONV
|| iconv_fd != (iconv_t)-1
# endif
)) {
while (conv_restlen > 0) {
*(--ptr) = bad_char_behavior;
--conv_restlen;
}
}
fio_flags = 0; // don't convert this
# ifdef HAVE_ICONV
if (iconv_fd != (iconv_t)-1) {
iconv_close(iconv_fd);
iconv_fd = (iconv_t)-1;
}
# endif
}
}
}
}
skip_read = FALSE;
/*
* At start of file: Check for BOM.
* Also check for a BOM for other Unicode encodings, but not after
* converting with 'charconvert' or when a BOM has already been
* found.
*/
if ((filesize == 0)
&& (fio_flags == FIO_UCSBOM
|| (!curbuf->b_p_bomb
&& tmpname == NULL
&& (*fenc == 'u' || (*fenc == NUL && enc_utf8))))) {
char_u *ccname;
int blen;
/* no BOM detection in a short file or in binary mode */
if (size < 2 || curbuf->b_p_bin)
ccname = NULL;
else
ccname = check_for_bom(ptr, size, &blen,
fio_flags == FIO_UCSBOM ? FIO_ALL : get_fio_flags(fenc));
if (ccname != NULL) {
/* Remove BOM from the text */
filesize += blen;
size -= blen;
memmove(ptr, ptr + blen, (size_t)size);
if (set_options) {
curbuf->b_p_bomb = TRUE;
curbuf->b_start_bomb = TRUE;
}
}
if (fio_flags == FIO_UCSBOM) {
if (ccname == NULL) {
// No BOM detected: retry with next encoding.
advance_fenc = true;
} else {
/* BOM detected: set "fenc" and jump back */
if (fenc_alloced)
xfree(fenc);
fenc = ccname;
fenc_alloced = false;
}
/* retry reading without getting new bytes or rewinding */
skip_read = TRUE;
goto retry;
}
}
/* Include not converted bytes. */
ptr -= conv_restlen;
size += conv_restlen;
conv_restlen = 0;
/*
* Break here for a read error or end-of-file.
*/
if (size <= 0)
break;
# ifdef HAVE_ICONV
if (iconv_fd != (iconv_t)-1) {
/*
* Attempt conversion of the read bytes to 'encoding' using
* iconv().
*/
const char *fromp;
char *top;
size_t from_size;
size_t to_size;
fromp = (char *)ptr;
from_size = size;
ptr += size;
top = (char *)ptr;
to_size = real_size - size;
/*
* If there is conversion error or not enough room try using
* another conversion. Except for when there is no
* alternative (help files).
*/
while ((iconv(iconv_fd, (void *)&fromp, &from_size,
&top, &to_size)
== (size_t)-1 && ICONV_ERRNO != ICONV_EINVAL)
|| from_size > CONV_RESTLEN) {
if (can_retry)
goto rewind_retry;
if (conv_error == 0)
conv_error = readfile_linenr(linecnt,
ptr, (char_u *)top);
/* Deal with a bad byte and continue with the next. */
++fromp;
--from_size;
if (bad_char_behavior == BAD_KEEP) {
*top++ = *(fromp - 1);
--to_size;
} else if (bad_char_behavior != BAD_DROP) {
*top++ = bad_char_behavior;
--to_size;
}
}
if (from_size > 0) {
/* Some remaining characters, keep them for the next
* round. */
memmove(conv_rest, (char_u *)fromp, from_size);
conv_restlen = (int)from_size;
}
/* move the linerest to before the converted characters */
line_start = ptr - linerest;
memmove(line_start, buffer, (size_t)linerest);
size = (long)((char_u *)top - ptr);
}
# endif
if (fio_flags != 0) {
unsigned int u8c;
char_u *dest;
char_u *tail = NULL;
/*
* "enc_utf8" set: Convert Unicode or Latin1 to UTF-8.
* "enc_utf8" not set: Convert Unicode to Latin1.
* Go from end to start through the buffer, because the number
* of bytes may increase.
* "dest" points to after where the UTF-8 bytes go, "p" points
* to after the next character to convert.
*/
dest = ptr + real_size;
if (fio_flags == FIO_LATIN1 || fio_flags == FIO_UTF8) {
p = ptr + size;
if (fio_flags == FIO_UTF8) {
/* Check for a trailing incomplete UTF-8 sequence */
tail = ptr + size - 1;
while (tail > ptr && (*tail & 0xc0) == 0x80)
--tail;
if (tail + utf_byte2len(*tail) <= ptr + size)
tail = NULL;
else
p = tail;
}
} else if (fio_flags & (FIO_UCS2 | FIO_UTF16)) {
/* Check for a trailing byte */
p = ptr + (size & ~1);
if (size & 1)
tail = p;
if ((fio_flags & FIO_UTF16) && p > ptr) {
/* Check for a trailing leading word */
if (fio_flags & FIO_ENDIAN_L) {
u8c = (*--p << 8);
u8c += *--p;
} else {
u8c = *--p;
u8c += (*--p << 8);
}
if (u8c >= 0xd800 && u8c <= 0xdbff)
tail = p;
else
p += 2;
}
} else { /* FIO_UCS4 */
/* Check for trailing 1, 2 or 3 bytes */
p = ptr + (size & ~3);
if (size & 3)
tail = p;
}
/* If there is a trailing incomplete sequence move it to
* conv_rest[]. */
if (tail != NULL) {
conv_restlen = (int)((ptr + size) - tail);
memmove(conv_rest, tail, conv_restlen);
size -= conv_restlen;
}
while (p > ptr) {
if (fio_flags & FIO_LATIN1)
u8c = *--p;
else if (fio_flags & (FIO_UCS2 | FIO_UTF16)) {
if (fio_flags & FIO_ENDIAN_L) {
u8c = (*--p << 8);
u8c += *--p;
} else {
u8c = *--p;
u8c += (*--p << 8);
}
if ((fio_flags & FIO_UTF16)
&& u8c >= 0xdc00 && u8c <= 0xdfff) {
int u16c;
if (p == ptr) {
/* Missing leading word. */
if (can_retry)
goto rewind_retry;
if (conv_error == 0)
conv_error = readfile_linenr(linecnt,
ptr, p);
if (bad_char_behavior == BAD_DROP)
continue;
if (bad_char_behavior != BAD_KEEP)
u8c = bad_char_behavior;
}
/* found second word of double-word, get the first
* word and compute the resulting character */
if (fio_flags & FIO_ENDIAN_L) {
u16c = (*--p << 8);
u16c += *--p;
} else {
u16c = *--p;
u16c += (*--p << 8);
}
u8c = 0x10000 + ((u16c & 0x3ff) << 10)
+ (u8c & 0x3ff);
/* Check if the word is indeed a leading word. */
if (u16c < 0xd800 || u16c > 0xdbff) {
if (can_retry)
goto rewind_retry;
if (conv_error == 0)
conv_error = readfile_linenr(linecnt,
ptr, p);
if (bad_char_behavior == BAD_DROP)
continue;
if (bad_char_behavior != BAD_KEEP)
u8c = bad_char_behavior;
}
}
} else if (fio_flags & FIO_UCS4) {
if (fio_flags & FIO_ENDIAN_L) {
u8c = (unsigned)(*--p) << 24;
u8c += (unsigned)(*--p) << 16;
u8c += (unsigned)(*--p) << 8;
u8c += *--p;
} else { /* big endian */
u8c = *--p;
u8c += (unsigned)(*--p) << 8;
u8c += (unsigned)(*--p) << 16;
u8c += (unsigned)(*--p) << 24;
}
} else { /* UTF-8 */
if (*--p < 0x80)
u8c = *p;
else {
len = utf_head_off(ptr, p);
p -= len;
u8c = utf_ptr2char(p);
if (len == 0) {
/* Not a valid UTF-8 character, retry with
* another fenc when possible, otherwise just
* report the error. */
if (can_retry)
goto rewind_retry;
if (conv_error == 0)
conv_error = readfile_linenr(linecnt,
ptr, p);
if (bad_char_behavior == BAD_DROP)
continue;
if (bad_char_behavior != BAD_KEEP)
u8c = bad_char_behavior;
}
}
}
assert(u8c <= INT_MAX);
// produce UTF-8
dest -= utf_char2len((int)u8c);
(void)utf_char2bytes((int)u8c, dest);
}
// move the linerest to before the converted characters
line_start = dest - linerest;
memmove(line_start, buffer, (size_t)linerest);
size = (long)((ptr + real_size) - dest);
ptr = dest;
} else if (enc_utf8 && !curbuf->b_p_bin) {
int incomplete_tail = FALSE;
// Reading UTF-8: Check if the bytes are valid UTF-8.
for (p = ptr;; p++) {
int todo = (int)((ptr + size) - p);
int l;
if (todo <= 0) {
break;
}
if (*p >= 0x80) {
// A length of 1 means it's an illegal byte. Accept
// an incomplete character at the end though, the next
// read() will get the next bytes, we'll check it
// then.
l = utf_ptr2len_len(p, todo);
if (l > todo && !incomplete_tail) {
/* Avoid retrying with a different encoding when
* a truncated file is more likely, or attempting
* to read the rest of an incomplete sequence when
* we have already done so. */
if (p > ptr || filesize > 0)
incomplete_tail = TRUE;
/* Incomplete byte sequence, move it to conv_rest[]
* and try to read the rest of it, unless we've
* already done so. */
if (p > ptr) {
conv_restlen = todo;
memmove(conv_rest, p, conv_restlen);
size -= conv_restlen;
break;
}
}
if (l == 1 || l > todo) {
/* Illegal byte. If we can try another encoding
* do that, unless at EOF where a truncated
* file is more likely than a conversion error. */
if (can_retry && !incomplete_tail)
break;
# ifdef HAVE_ICONV
// When we did a conversion report an error.
if (iconv_fd != (iconv_t)-1 && conv_error == 0) {
conv_error = readfile_linenr(linecnt, ptr, p);
}
# endif
/* Remember the first linenr with an illegal byte */
if (conv_error == 0 && illegal_byte == 0)
illegal_byte = readfile_linenr(linecnt, ptr, p);
/* Drop, keep or replace the bad byte. */
if (bad_char_behavior == BAD_DROP) {
memmove(p, p + 1, todo - 1);
--p;
--size;
} else if (bad_char_behavior != BAD_KEEP)
*p = bad_char_behavior;
} else
p += l - 1;
}
}
if (p < ptr + size && !incomplete_tail) {
/* Detected a UTF-8 error. */
rewind_retry:
// Retry reading with another conversion.
# ifdef HAVE_ICONV
if (*p_ccv != NUL && iconv_fd != (iconv_t)-1) {
// iconv() failed, try 'charconvert'
did_iconv = true;
} else {
# endif
// use next item from 'fileencodings'
advance_fenc = true;
# ifdef HAVE_ICONV
}
# endif
file_rewind = true;
goto retry;
}
}
/* count the number of characters (after conversion!) */
filesize += size;
/*
* when reading the first part of a file: guess EOL type
*/
if (fileformat == EOL_UNKNOWN) {
/* First try finding a NL, for Dos and Unix */
if (try_dos || try_unix) {
// Reset the carriage return counter.
if (try_mac) {
try_mac = 1;
}
for (p = ptr; p < ptr + size; ++p) {
if (*p == NL) {
if (!try_unix
|| (try_dos && p > ptr && p[-1] == CAR))
fileformat = EOL_DOS;
else
fileformat = EOL_UNIX;
break;
} else if (*p == CAR && try_mac) {
try_mac++;
}
}
/* Don't give in to EOL_UNIX if EOL_MAC is more likely */
if (fileformat == EOL_UNIX && try_mac) {
/* Need to reset the counters when retrying fenc. */
try_mac = 1;
try_unix = 1;
for (; p >= ptr && *p != CAR; p--)
;
if (p >= ptr) {
for (p = ptr; p < ptr + size; ++p) {
if (*p == NL)
try_unix++;
else if (*p == CAR)
try_mac++;
}
if (try_mac > try_unix)
fileformat = EOL_MAC;
}
} else if (fileformat == EOL_UNKNOWN && try_mac == 1) {
// Looking for CR but found no end-of-line markers at all:
// use the default format.
fileformat = default_fileformat();
}
}
/* No NL found: may use Mac format */
if (fileformat == EOL_UNKNOWN && try_mac)
fileformat = EOL_MAC;
/* Still nothing found? Use first format in 'ffs' */
if (fileformat == EOL_UNKNOWN)
fileformat = default_fileformat();
// May set 'p_ff' if editing a new file.
if (set_options) {
set_fileformat(fileformat, OPT_LOCAL);
}
}
}
/*
* This loop is executed once for every character read.
* Keep it fast!
*/
if (fileformat == EOL_MAC) {
--ptr;
while (++ptr, --size >= 0) {
/* catch most common case first */
if ((c = *ptr) != NUL && c != CAR && c != NL)
continue;
if (c == NUL)
*ptr = NL; /* NULs are replaced by newlines! */
else if (c == NL)
*ptr = CAR; /* NLs are replaced by CRs! */
else {
if (skip_count == 0) {
*ptr = NUL; /* end of line */
len = (colnr_T) (ptr - line_start + 1);
if (ml_append(lnum, line_start, len, newfile) == FAIL) {
error = TRUE;
break;
}
if (read_undo_file)
sha256_update(&sha_ctx, line_start, len);
++lnum;
if (--read_count == 0) {
error = TRUE; /* break loop */
line_start = ptr; /* nothing left to write */
break;
}
} else
--skip_count;
line_start = ptr + 1;
}
}
} else {
--ptr;
while (++ptr, --size >= 0) {
if ((c = *ptr) != NUL && c != NL) /* catch most common case */
continue;
if (c == NUL)
*ptr = NL; /* NULs are replaced by newlines! */
else {
if (skip_count == 0) {
*ptr = NUL; /* end of line */
len = (colnr_T)(ptr - line_start + 1);
if (fileformat == EOL_DOS) {
if (ptr > line_start && ptr[-1] == CAR) {
// remove CR before NL
ptr[-1] = NUL;
len--;
} else if (ff_error != EOL_DOS) {
// Reading in Dos format, but no CR-LF found!
// When 'fileformats' includes "unix", delete all
// the lines read so far and start all over again.
// Otherwise give an error message later.
if (try_unix
&& !read_stdin
&& (read_buffer
|| vim_lseek(fd, (off_T)0L, SEEK_SET) == 0)) {
fileformat = EOL_UNIX;
if (set_options)
set_fileformat(EOL_UNIX, OPT_LOCAL);
file_rewind = true;
keep_fileformat = true;
goto retry;
}
ff_error = EOL_DOS;
}
}
if (ml_append(lnum, line_start, len, newfile) == FAIL) {
error = TRUE;
break;
}
if (read_undo_file)
sha256_update(&sha_ctx, line_start, len);
++lnum;
if (--read_count == 0) {
error = TRUE; /* break loop */
line_start = ptr; /* nothing left to write */
break;
}
} else
--skip_count;
line_start = ptr + 1;
}
}
}
linerest = (long)(ptr - line_start);
os_breakcheck();
}
failed:
/* not an error, max. number of lines reached */
if (error && read_count == 0)
error = FALSE;
/*
* If we get EOF in the middle of a line, note the fact and
* complete the line ourselves.
* In Dos format ignore a trailing CTRL-Z, unless 'binary' set.
*/
if (!error
&& !got_int
&& linerest != 0
&& !(!curbuf->b_p_bin
&& fileformat == EOL_DOS
&& *line_start == Ctrl_Z
&& ptr == line_start + 1)) {
/* remember for when writing */
if (set_options)
curbuf->b_p_eol = FALSE;
*ptr = NUL;
len = (colnr_T)(ptr - line_start + 1);
if (ml_append(lnum, line_start, len, newfile) == FAIL)
error = TRUE;
else {
if (read_undo_file)
sha256_update(&sha_ctx, line_start, len);
read_no_eol_lnum = ++lnum;
}
}
if (set_options) {
// Remember the current file format.
save_file_ff(curbuf);
// If editing a new file: set 'fenc' for the current buffer.
// Also for ":read ++edit file".
set_string_option_direct((char_u *)"fenc", -1, fenc,
OPT_FREE | OPT_LOCAL, 0);
}
if (fenc_alloced)
xfree(fenc);
# ifdef HAVE_ICONV
if (iconv_fd != (iconv_t)-1) {
iconv_close(iconv_fd);
# ifndef __clang_analyzer__
iconv_fd = (iconv_t)-1;
# endif
}
# endif
if (!read_buffer && !read_stdin) {
close(fd); // errors are ignored
} else {
(void)os_set_cloexec(fd);
}
xfree(buffer);
if (read_stdin) {
close(0);
#ifndef WIN32
// On Unix, use stderr for stdin, makes shell commands work.
vim_ignored = dup(2);
#else
// On Windows, use the console input handle for stdin.
HANDLE conin = CreateFile("CONIN$", GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ, (LPSECURITY_ATTRIBUTES)NULL,
OPEN_EXISTING, 0, (HANDLE)NULL);
vim_ignored = _open_osfhandle(conin, _O_RDONLY);
#endif
}
if (tmpname != NULL) {
os_remove((char *)tmpname); // delete converted file
xfree(tmpname);
}
--no_wait_return; /* may wait for return now */
/*
* In recovery mode everything but autocommands is skipped.
*/
if (!recoverymode) {
/* need to delete the last line, which comes from the empty buffer */
if (newfile && wasempty && !(curbuf->b_ml.ml_flags & ML_EMPTY)) {
ml_delete(curbuf->b_ml.ml_line_count, false);
linecnt--;
}
curbuf->deleted_bytes = 0;
curbuf->deleted_codepoints = 0;
curbuf->deleted_codeunits = 0;
linecnt = curbuf->b_ml.ml_line_count - linecnt;
if (filesize == 0)
linecnt = 0;
if (newfile || read_buffer) {
redraw_curbuf_later(NOT_VALID);
/* After reading the text into the buffer the diff info needs to
* be updated. */
diff_invalidate(curbuf);
/* All folds in the window are invalid now. Mark them for update
* before triggering autocommands. */
foldUpdateAll(curwin);
} else if (linecnt) /* appended at least one line */
appended_lines_mark(from, linecnt);
/*
* If we were reading from the same terminal as where messages go,
* the screen will have been messed up.
* Switch on raw mode now and clear the screen.
*/
if (read_stdin) {
screenclear();
}
if (got_int) {
if (!(flags & READ_DUMMY)) {
filemess(curbuf, sfname, (char_u *)_(e_interr), 0);
if (newfile)
curbuf->b_p_ro = TRUE; /* must use "w!" now */
}
msg_scroll = msg_save;
check_marks_read();
return OK; /* an interrupt isn't really an error */
}
if (!filtering && !(flags & READ_DUMMY)) {
add_quoted_fname((char *)IObuff, IOSIZE, curbuf, (const char *)sfname);
c = false;
#ifdef UNIX
# ifdef S_ISFIFO
if (S_ISFIFO(perm)) { /* fifo or socket */
STRCAT(IObuff, _("[fifo/socket]"));
c = TRUE;
}
# else
# ifdef S_IFIFO
if ((perm & S_IFMT) == S_IFIFO) { /* fifo */
STRCAT(IObuff, _("[fifo]"));
c = TRUE;
}
# endif
# ifdef S_IFSOCK
if ((perm & S_IFMT) == S_IFSOCK) { /* or socket */
STRCAT(IObuff, _("[socket]"));
c = TRUE;
}
# endif
# endif
# ifdef OPEN_CHR_FILES
if (S_ISCHR(perm)) { /* or character special */
STRCAT(IObuff, _("[character special]"));
c = TRUE;
}
# endif
#endif
if (curbuf->b_p_ro) {
STRCAT(IObuff, shortmess(SHM_RO) ? _("[RO]") : _("[readonly]"));
c = TRUE;
}
if (read_no_eol_lnum) {
msg_add_eol();
c = TRUE;
}
if (ff_error == EOL_DOS) {
STRCAT(IObuff, _("[CR missing]"));
c = TRUE;
}
if (notconverted) {
STRCAT(IObuff, _("[NOT converted]"));
c = TRUE;
} else if (converted) {
STRCAT(IObuff, _("[converted]"));
c = TRUE;
}
if (conv_error != 0) {
sprintf((char *)IObuff + STRLEN(IObuff),
_("[CONVERSION ERROR in line %" PRId64 "]"), (int64_t)conv_error);
c = TRUE;
} else if (illegal_byte > 0) {
sprintf((char *)IObuff + STRLEN(IObuff),
_("[ILLEGAL BYTE in line %" PRId64 "]"), (int64_t)illegal_byte);
c = TRUE;
} else if (error) {
STRCAT(IObuff, _("[READ ERRORS]"));
c = TRUE;
}
if (msg_add_fileformat(fileformat))
c = TRUE;
msg_add_lines(c, (long)linecnt, filesize);
XFREE_CLEAR(keep_msg);
p = NULL;
msg_scrolled_ign = TRUE;
if (!read_stdin && !read_buffer) {
p = msg_trunc_attr(IObuff, FALSE, 0);
}
if (read_stdin || read_buffer || restart_edit != 0
|| (msg_scrolled != 0 && !need_wait_return)) {
// Need to repeat the message after redrawing when:
// - When reading from stdin (the screen will be cleared next).
// - When restart_edit is set (otherwise there will be a delay before
// redrawing).
// - When the screen was scrolled but there is no wait-return prompt.
set_keep_msg(p, 0);
}
msg_scrolled_ign = FALSE;
}
/* with errors writing the file requires ":w!" */
if (newfile && (error
|| conv_error != 0
|| (illegal_byte > 0 && bad_char_behavior != BAD_KEEP)
))
curbuf->b_p_ro = TRUE;
u_clearline(); /* cannot use "U" command after adding lines */
/*
* In Ex mode: cursor at last new line.
* Otherwise: cursor at first new line.
*/
if (exmode_active)
curwin->w_cursor.lnum = from + linecnt;
else
curwin->w_cursor.lnum = from + 1;
check_cursor_lnum();
beginline(BL_WHITE | BL_FIX); /* on first non-blank */
/*
* Set '[ and '] marks to the newly read lines.
*/
curbuf->b_op_start.lnum = from + 1;
curbuf->b_op_start.col = 0;
curbuf->b_op_end.lnum = from + linecnt;
curbuf->b_op_end.col = 0;
}
msg_scroll = msg_save;
/*
* Get the marks before executing autocommands, so they can be used there.
*/
check_marks_read();
/*
* We remember if the last line of the read didn't have
* an eol even when 'binary' is off, to support turning 'fixeol' off,
* or writing the read again with 'binary' on. The latter is required
* for ":autocmd FileReadPost *.gz set bin|'[,']!gunzip" to work.
*/
curbuf->b_no_eol_lnum = read_no_eol_lnum;
/* When reloading a buffer put the cursor at the first line that is
* different. */
if (flags & READ_KEEP_UNDO)
u_find_first_changed();
/*
* When opening a new file locate undo info and read it.
*/
if (read_undo_file) {
char_u hash[UNDO_HASH_SIZE];
sha256_finish(&sha_ctx, hash);
u_read_undo(NULL, hash, fname);
}
if (!read_stdin && !read_fifo && (!read_buffer || sfname != NULL)) {
int m = msg_scroll;
int n = msg_scrolled;
/* Save the fileformat now, otherwise the buffer will be considered
* modified if the format/encoding was automatically detected. */
if (set_options)
save_file_ff(curbuf);
/*
* The output from the autocommands should not overwrite anything and
* should not be overwritten: Set msg_scroll, restore its value if no
* output was done.
*/
msg_scroll = true;
if (filtering) {
apply_autocmds_exarg(EVENT_FILTERREADPOST, NULL, sfname,
false, curbuf, eap);
} else if (newfile || (read_buffer && sfname != NULL)) {
apply_autocmds_exarg(EVENT_BUFREADPOST, NULL, sfname,
false, curbuf, eap);
if (!au_did_filetype && *curbuf->b_p_ft != NUL) {
// EVENT_FILETYPE was not triggered but the buffer already has a
// filetype. Trigger EVENT_FILETYPE using the existing filetype.
apply_autocmds(EVENT_FILETYPE, curbuf->b_p_ft, curbuf->b_fname,
true, curbuf);
}
} else {
apply_autocmds_exarg(EVENT_FILEREADPOST, sfname, sfname,
false, NULL, eap);
}
if (msg_scrolled == n) {
msg_scroll = m;
}
if (aborting()) { // autocmds may abort script processing
return FAIL;
}
}
if (recoverymode && error)
return FAIL;
return OK;
}
#ifdef OPEN_CHR_FILES
/// Returns true if the file name argument is of the form "/dev/fd/\d\+",
/// which is the name of files used for process substitution output by
/// some shells on some operating systems, e.g., bash on SunOS.
/// Do not accept "/dev/fd/[012]", opening these may hang Vim.
///
/// @param fname file name to check
bool is_dev_fd_file(char_u *fname)
FUNC_ATTR_NONNULL_ALL FUNC_ATTR_WARN_UNUSED_RESULT
{
return STRNCMP(fname, "/dev/fd/", 8) == 0
&& ascii_isdigit(fname[8])
&& *skipdigits(fname + 9) == NUL
&& (fname[9] != NUL
|| (fname[8] != '0' && fname[8] != '1' && fname[8] != '2'));
}
#endif
/*
* From the current line count and characters read after that, estimate the
* line number where we are now.
* Used for error messages that include a line number.
*/
static linenr_T
readfile_linenr(
linenr_T linecnt, // line count before reading more bytes
char_u *p, // start of more bytes read
char_u *endp // end of more bytes read
)
{
char_u *s;
linenr_T lnum;
lnum = curbuf->b_ml.ml_line_count - linecnt + 1;
for (s = p; s < endp; ++s)
if (*s == '\n')
++lnum;
return lnum;
}
/*
* Fill "*eap" to force the 'fileencoding', 'fileformat' and 'binary to be
* equal to the buffer "buf". Used for calling readfile().
*/
void prep_exarg(exarg_T *eap, const buf_T *buf)
FUNC_ATTR_NONNULL_ALL
{
const size_t cmd_len = 15 + STRLEN(buf->b_p_fenc);
eap->cmd = xmalloc(cmd_len);
snprintf((char *)eap->cmd, cmd_len, "e ++enc=%s", buf->b_p_fenc);
eap->force_enc = 8;
eap->bad_char = buf->b_bad_char;
eap->force_ff = *buf->b_p_ff;
eap->force_bin = buf->b_p_bin ? FORCE_BIN : FORCE_NOBIN;
eap->read_edit = FALSE;
eap->forceit = FALSE;
}
/*
* Set default or forced 'fileformat' and 'binary'.
*/
void set_file_options(int set_options, exarg_T *eap)
{
/* set default 'fileformat' */
if (set_options) {
if (eap != NULL && eap->force_ff != 0)
set_fileformat(get_fileformat_force(curbuf, eap), OPT_LOCAL);
else if (*p_ffs != NUL)
set_fileformat(default_fileformat(), OPT_LOCAL);
}
/* set or reset 'binary' */
if (eap != NULL && eap->force_bin != 0) {
int oldval = curbuf->b_p_bin;
curbuf->b_p_bin = (eap->force_bin == FORCE_BIN);
set_options_bin(oldval, curbuf->b_p_bin, OPT_LOCAL);
}
}
/*
* Set forced 'fileencoding'.
*/
void set_forced_fenc(exarg_T *eap)
{
if (eap->force_enc != 0) {
char_u *fenc = enc_canonize(eap->cmd + eap->force_enc);
set_string_option_direct((char_u *)"fenc", -1, fenc, OPT_FREE|OPT_LOCAL, 0);
xfree(fenc);
}
}
// Find next fileencoding to use from 'fileencodings'.
// "pp" points to fenc_next. It's advanced to the next item.
// When there are no more items, an empty string is returned and *pp is set to
// NULL.
// When *pp is not set to NULL, the result is in allocated memory and "alloced"
// is set to true.
static char_u *next_fenc(char_u **pp, bool *alloced)
FUNC_ATTR_NONNULL_ALL FUNC_ATTR_NONNULL_RET
{
char_u *p;
char_u *r;
*alloced = false;
if (**pp == NUL) {
*pp = NULL;
return (char_u *)"";
}
p = vim_strchr(*pp, ',');
if (p == NULL) {
r = enc_canonize(*pp);
*pp += STRLEN(*pp);
} else {
r = vim_strnsave(*pp, (int)(p - *pp));
*pp = p + 1;
p = enc_canonize(r);
xfree(r);
r = p;
}
*alloced = true;
return r;
}
/*
* Convert a file with the 'charconvert' expression.
* This closes the file which is to be read, converts it and opens the
* resulting file for reading.
* Returns name of the resulting converted file (the caller should delete it
* after reading it).
* Returns NULL if the conversion failed ("*fdp" is not set) .
*/
static char_u *
readfile_charconvert (
char_u *fname, /* name of input file */
char_u *fenc, /* converted from */
int *fdp /* in/out: file descriptor of file */
)
{
char_u *tmpname;
char_u *errmsg = NULL;
tmpname = vim_tempname();
if (tmpname == NULL)
errmsg = (char_u *)_("Can't find temp file for conversion");
else {
close(*fdp); /* close the input file, ignore errors */
*fdp = -1;
if (eval_charconvert((char *) fenc, enc_utf8 ? "utf-8" : (char *) p_enc,
(char *) fname, (char *) tmpname) == FAIL) {
errmsg = (char_u *)_("Conversion with 'charconvert' failed");
}
if (errmsg == NULL && (*fdp = os_open((char *)tmpname, O_RDONLY, 0)) < 0) {
errmsg = (char_u *)_("can't read output of 'charconvert'");
}
}
if (errmsg != NULL) {
/* Don't use emsg(), it breaks mappings, the retry with
* another type of conversion might still work. */
MSG(errmsg);
if (tmpname != NULL) {
os_remove((char *)tmpname); // delete converted file
XFREE_CLEAR(tmpname);
}
}
/* If the input file is closed, open it (caller should check for error). */
if (*fdp < 0) {
*fdp = os_open((char *)fname, O_RDONLY, 0);
}
return tmpname;
}
/*
* Read marks for the current buffer from the ShaDa file, when we support
* buffer marks and the buffer has a name.
*/
static void check_marks_read(void)
{
if (!curbuf->b_marks_read && get_shada_parameter('\'') > 0
&& curbuf->b_ffname != NULL) {
shada_read_marks();
}
/* Always set b_marks_read; needed when 'shada' is changed to include
* the ' parameter after opening a buffer. */
curbuf->b_marks_read = true;
}
char *new_file_message(void)
{
return shortmess(SHM_NEW) ? _("[New]") : _("[New File]");
}
/*
* buf_write() - write to file "fname" lines "start" through "end"
*
* We do our own buffering here because fwrite() is so slow.
*
* If "forceit" is true, we don't care for errors when attempting backups.
* In case of an error everything possible is done to restore the original
* file. But when "forceit" is TRUE, we risk losing it.
*
* When "reset_changed" is TRUE and "append" == FALSE and "start" == 1 and
* "end" == curbuf->b_ml.ml_line_count, reset curbuf->b_changed.
*
* This function must NOT use NameBuff (because it's called by autowrite()).
*
* return FAIL for failure, OK otherwise
*/
int
buf_write(
buf_T *buf,
char_u *fname,
char_u *sfname,
linenr_T start,
linenr_T end,
exarg_T *eap, /* for forced 'ff' and 'fenc', can be
NULL! */
int append, /* append to the file */
int forceit,
int reset_changed,
int filtering
)
{
int fd;
char_u *backup = NULL;
int backup_copy = FALSE; /* copy the original file? */
int dobackup;
char_u *ffname;
char_u *wfname = NULL; /* name of file to write to */
char_u *s;
char_u *ptr;
char_u c;
int len;
linenr_T lnum;
long nchars;
#define SET_ERRMSG_NUM(num, msg) \
errnum = num, errmsg = msg, errmsgarg = 0
#define SET_ERRMSG_ARG(msg, error) \
errnum = NULL, errmsg = msg, errmsgarg = error
#define SET_ERRMSG(msg) \
errnum = NULL, errmsg = msg, errmsgarg = 0
const char *errnum = NULL;
char *errmsg = NULL;
int errmsgarg = 0;
bool errmsg_allocated = false;
char_u *buffer;
char_u smallbuf[SMBUFSIZE];
char_u *backup_ext;
int bufsize;
long perm; // file permissions
int retval = OK;
int newfile = false; // TRUE if file doesn't exist yet
int msg_save = msg_scroll;
int overwriting; // TRUE if writing over original
int no_eol = false; // no end-of-line written
int device = false; // writing to a device
int prev_got_int = got_int;
int checking_conversion;
bool file_readonly = false; // overwritten file is read-only
static char *err_readonly =
"is read-only (cannot override: \"W\" in 'cpoptions')";
#if defined(UNIX)
int made_writable = FALSE; /* 'w' bit has been set */
#endif
/* writing everything */
int whole = (start == 1 && end == buf->b_ml.ml_line_count);
linenr_T old_line_count = buf->b_ml.ml_line_count;
int fileformat;
int write_bin;
struct bw_info write_info; /* info for buf_write_bytes() */
int converted = FALSE;
int notconverted = FALSE;
char_u *fenc; /* effective 'fileencoding' */
char_u *fenc_tofree = NULL; /* allocated "fenc" */
#ifdef HAS_BW_FLAGS
int wb_flags = 0;
#endif
#ifdef HAVE_ACL
vim_acl_T acl = NULL; /* ACL copied from original file to
backup or new file */
#endif
int write_undo_file = FALSE;
context_sha256_T sha_ctx;
unsigned int bkc = get_bkc_value(buf);
if (fname == NULL || *fname == NUL) /* safety check */
return FAIL;
if (buf->b_ml.ml_mfp == NULL) {
/* This can happen during startup when there is a stray "w" in the
* vimrc file. */
EMSG(_(e_emptybuf));
return FAIL;
}
/*
* Disallow writing from .exrc and .vimrc in current directory for
* security reasons.
*/
if (check_secure())
return FAIL;
/* Avoid a crash for a long name. */
if (STRLEN(fname) >= MAXPATHL) {
EMSG(_(e_longname));
return FAIL;
}
/* must init bw_conv_buf and bw_iconv_fd before jumping to "fail" */
write_info.bw_conv_buf = NULL;
write_info.bw_conv_error = FALSE;
write_info.bw_conv_error_lnum = 0;
write_info.bw_restlen = 0;
# ifdef HAVE_ICONV
write_info.bw_iconv_fd = (iconv_t)-1;
# endif
/* After writing a file changedtick changes but we don't want to display
* the line. */
ex_no_reprint = TRUE;
/*
* If there is no file name yet, use the one for the written file.
* BF_NOTEDITED is set to reflect this (in case the write fails).
* Don't do this when the write is for a filter command.
* Don't do this when appending.
* Only do this when 'cpoptions' contains the 'F' flag.
*/
if (buf->b_ffname == NULL
&& reset_changed
&& whole
&& buf == curbuf
&& !bt_nofile(buf)
&& !filtering
&& (!append || vim_strchr(p_cpo, CPO_FNAMEAPP) != NULL)
&& vim_strchr(p_cpo, CPO_FNAMEW) != NULL) {
if (set_rw_fname(fname, sfname) == FAIL)
return FAIL;
buf = curbuf; /* just in case autocmds made "buf" invalid */
}
if (sfname == NULL)
sfname = fname;
// For Unix: Use the short file name whenever possible.
// Avoids problems with networks and when directory names are changed.
// Don't do this for Windows, a "cd" in a sub-shell may have moved us to
// another directory, which we don't detect.
ffname = fname; // remember full fname
#ifdef UNIX
fname = sfname;
#endif
if (buf->b_ffname != NULL && fnamecmp(ffname, buf->b_ffname) == 0)
overwriting = TRUE;
else
overwriting = FALSE;
++no_wait_return; /* don't wait for return yet */
/*
* Set '[ and '] marks to the lines to be written.
*/
buf->b_op_start.lnum = start;
buf->b_op_start.col = 0;
buf->b_op_end.lnum = end;
buf->b_op_end.col = 0;
{
aco_save_T aco;
int buf_ffname = FALSE;
int buf_sfname = FALSE;
int buf_fname_f = FALSE;
int buf_fname_s = FALSE;
int did_cmd = FALSE;
int nofile_err = FALSE;
int empty_memline = (buf->b_ml.ml_mfp == NULL);
bufref_T bufref;
/*
* Apply PRE autocommands.
* Set curbuf to the buffer to be written.
* Careful: The autocommands may call buf_write() recursively!
*/
if (ffname == buf->b_ffname)
buf_ffname = TRUE;
if (sfname == buf->b_sfname)
buf_sfname = TRUE;
if (fname == buf->b_ffname)
buf_fname_f = TRUE;
if (fname == buf->b_sfname)
buf_fname_s = TRUE;
// Set curwin/curbuf to buf and save a few things.
aucmd_prepbuf(&aco, buf);
set_bufref(&bufref, buf);
if (append) {
if (!(did_cmd = apply_autocmds_exarg(EVENT_FILEAPPENDCMD,
sfname, sfname, FALSE, curbuf, eap))) {
if (overwriting && bt_nofile(curbuf))
nofile_err = TRUE;
else
apply_autocmds_exarg(EVENT_FILEAPPENDPRE,
sfname, sfname, FALSE, curbuf, eap);
}
} else if (filtering) {
apply_autocmds_exarg(EVENT_FILTERWRITEPRE,
NULL, sfname, FALSE, curbuf, eap);
} else if (reset_changed && whole) {
int was_changed = curbufIsChanged();
did_cmd = apply_autocmds_exarg(EVENT_BUFWRITECMD,
sfname, sfname, FALSE, curbuf, eap);
if (did_cmd) {
if (was_changed && !curbufIsChanged()) {
/* Written everything correctly and BufWriteCmd has reset
* 'modified': Correct the undo information so that an
* undo now sets 'modified'. */
u_unchanged(curbuf);
u_update_save_nr(curbuf);
}
} else {
if (overwriting && bt_nofile(curbuf))
nofile_err = TRUE;
else
apply_autocmds_exarg(EVENT_BUFWRITEPRE,
sfname, sfname, FALSE, curbuf, eap);
}
} else {
if (!(did_cmd = apply_autocmds_exarg(EVENT_FILEWRITECMD,
sfname, sfname, FALSE, curbuf, eap))) {
if (overwriting && bt_nofile(curbuf))
nofile_err = TRUE;
else
apply_autocmds_exarg(EVENT_FILEWRITEPRE,
sfname, sfname, FALSE, curbuf, eap);
}
}
/* restore curwin/curbuf and a few other things */
aucmd_restbuf(&aco);
// In three situations we return here and don't write the file:
// 1. the autocommands deleted or unloaded the buffer.
// 2. The autocommands abort script processing.
// 3. If one of the "Cmd" autocommands was executed.
if (!bufref_valid(&bufref)) {
buf = NULL;
}
if (buf == NULL || (buf->b_ml.ml_mfp == NULL && !empty_memline)
|| did_cmd || nofile_err
|| aborting()
) {
--no_wait_return;
msg_scroll = msg_save;
if (nofile_err)
EMSG(_("E676: No matching autocommands for acwrite buffer"));
if (nofile_err
|| aborting()
)
/* An aborting error, interrupt or exception in the
* autocommands. */
return FAIL;
if (did_cmd) {
if (buf == NULL)
/* The buffer was deleted. We assume it was written
* (can't retry anyway). */
return OK;
if (overwriting) {
/* Assume the buffer was written, update the timestamp. */
ml_timestamp(buf);
if (append)
buf->b_flags &= ~BF_NEW;
else
buf->b_flags &= ~BF_WRITE_MASK;
}
if (reset_changed && buf->b_changed && !append
&& (overwriting || vim_strchr(p_cpo, CPO_PLUS) != NULL))
/* Buffer still changed, the autocommands didn't work
* properly. */
return FAIL;
return OK;
}
if (!aborting())
EMSG(_("E203: Autocommands deleted or unloaded buffer to be written"));
return FAIL;
}
/*
* The autocommands may have changed the number of lines in the file.
* When writing the whole file, adjust the end.
* When writing part of the file, assume that the autocommands only
* changed the number of lines that are to be written (tricky!).
*/
if (buf->b_ml.ml_line_count != old_line_count) {
if (whole) /* write all */
end = buf->b_ml.ml_line_count;
else if (buf->b_ml.ml_line_count > old_line_count) /* more lines */
end += buf->b_ml.ml_line_count - old_line_count;
else { /* less lines */
end -= old_line_count - buf->b_ml.ml_line_count;
if (end < start) {
--no_wait_return;
msg_scroll = msg_save;
EMSG(_("E204: Autocommand changed number of lines in unexpected way"));
return FAIL;
}
}
}
/*
* The autocommands may have changed the name of the buffer, which may
* be kept in fname, ffname and sfname.
*/
if (buf_ffname)
ffname = buf->b_ffname;
if (buf_sfname)
sfname = buf->b_sfname;
if (buf_fname_f)
fname = buf->b_ffname;
if (buf_fname_s)
fname = buf->b_sfname;
}
if (shortmess(SHM_OVER) && !exiting)
msg_scroll = FALSE; /* overwrite previous file message */
else
msg_scroll = TRUE; /* don't overwrite previous file message */
if (!filtering)
filemess(buf,
#ifndef UNIX
sfname,
#else
fname,
#endif
(char_u *)"", 0); /* show that we are busy */
msg_scroll = FALSE; /* always overwrite the file message now */
buffer = verbose_try_malloc(BUFSIZE);
// can't allocate big buffer, use small one (to be able to write when out of
// memory)
if (buffer == NULL) {
buffer = smallbuf;
bufsize = SMBUFSIZE;
} else
bufsize = BUFSIZE;
/*
* Get information about original file (if there is one).
*/
FileInfo file_info_old;
#if defined(UNIX)
perm = -1;
if (!os_fileinfo((char *)fname, &file_info_old)) {
newfile = TRUE;
} else {
perm = file_info_old.stat.st_mode;
if (!S_ISREG(file_info_old.stat.st_mode)) { /* not a file */
if (S_ISDIR(file_info_old.stat.st_mode)) {
SET_ERRMSG_NUM("E502", _("is a directory"));
goto fail;
}
if (os_nodetype((char *)fname) != NODE_WRITABLE) {
SET_ERRMSG_NUM("E503", _("is not a file or writable device"));
goto fail;
}
/* It's a device of some kind (or a fifo) which we can write to
* but for which we can't make a backup. */
device = TRUE;
newfile = TRUE;
perm = -1;
}
}
#else // win32
// Check for a writable device name.
c = fname == NULL ? NODE_OTHER : os_nodetype((char *)fname);
if (c == NODE_OTHER) {
SET_ERRMSG_NUM("E503", _("is not a file or writable device"));
goto fail;
}
if (c == NODE_WRITABLE) {
device = TRUE;
newfile = TRUE;
perm = -1;
} else {
perm = os_getperm((const char *)fname);
if (perm < 0) {
newfile = true;
} else if (os_isdir(fname)) {
SET_ERRMSG_NUM("E502", _("is a directory"));
goto fail;
}
if (overwriting) {
os_fileinfo((char *)fname, &file_info_old);
}
}
#endif // !UNIX
if (!device && !newfile) {
/*
* Check if the file is really writable (when renaming the file to
* make a backup we won't discover it later).
*/
file_readonly = !os_file_is_writable((char *)fname);
if (!forceit && file_readonly) {
if (vim_strchr(p_cpo, CPO_FWRITE) != NULL) {
SET_ERRMSG_NUM("E504", _(err_readonly));
} else {
SET_ERRMSG_NUM("E505", _("is read-only (add ! to override)"));
}
goto fail;
}
/*
* Check if the timestamp hasn't changed since reading the file.
*/
if (overwriting) {
retval = check_mtime(buf, &file_info_old);
if (retval == FAIL)
goto fail;
}
}
#ifdef HAVE_ACL
/*
* For systems that support ACL: get the ACL from the original file.
*/
if (!newfile)
acl = mch_get_acl(fname);
#endif
/*
* If 'backupskip' is not empty, don't make a backup for some files.
*/
dobackup = (p_wb || p_bk || *p_pm != NUL);
if (dobackup && *p_bsk != NUL && match_file_list(p_bsk, sfname, ffname))
dobackup = FALSE;
/*
* Save the value of got_int and reset it. We don't want a previous
* interruption cancel writing, only hitting CTRL-C while writing should
* abort it.
*/
prev_got_int = got_int;
got_int = FALSE;
/* Mark the buffer as 'being saved' to prevent changed buffer warnings */
buf->b_saving = true;
/*
* If we are not appending or filtering, the file exists, and the
* 'writebackup', 'backup' or 'patchmode' option is set, need a backup.
* When 'patchmode' is set also make a backup when appending.
*
* Do not make any backup, if 'writebackup' and 'backup' are both switched
* off. This helps when editing large files on almost-full disks.
*/
if (!(append && *p_pm == NUL) && !filtering && perm >= 0 && dobackup) {
FileInfo file_info;
const bool no_prepend_dot = false;
if ((bkc & BKC_YES) || append) { /* "yes" */
backup_copy = TRUE;
} else if ((bkc & BKC_AUTO)) { /* "auto" */
int i;
/*
* Don't rename the file when:
* - it's a hard link
* - it's a symbolic link
* - we don't have write permission in the directory
*/
if (os_fileinfo_hardlinks(&file_info_old) > 1
|| !os_fileinfo_link((char *)fname, &file_info)
|| !os_fileinfo_id_equal(&file_info, &file_info_old)) {
backup_copy = TRUE;
} else {
/*
* Check if we can create a file and set the owner/group to
* the ones from the original file.
* First find a file name that doesn't exist yet (use some
* arbitrary numbers).
*/
STRCPY(IObuff, fname);
for (i = 4913;; i += 123) {
sprintf((char *)path_tail(IObuff), "%d", i);
if (!os_fileinfo_link((char *)IObuff, &file_info)) {
break;
}
}
fd = os_open((char *)IObuff,
O_CREAT|O_WRONLY|O_EXCL|O_NOFOLLOW, perm);
if (fd < 0) /* can't write in directory */
backup_copy = TRUE;
else {
# ifdef UNIX
os_fchown(fd, file_info_old.stat.st_uid, file_info_old.stat.st_gid);
if (!os_fileinfo((char *)IObuff, &file_info)
|| file_info.stat.st_uid != file_info_old.stat.st_uid
|| file_info.stat.st_gid != file_info_old.stat.st_gid
|| (long)file_info.stat.st_mode != perm) {
backup_copy = TRUE;
}
# endif
/* Close the file before removing it, on MS-Windows we
* can't delete an open file. */
close(fd);
os_remove((char *)IObuff);
}
}
}
/*
* Break symlinks and/or hardlinks if we've been asked to.
*/
if ((bkc & BKC_BREAKSYMLINK) || (bkc & BKC_BREAKHARDLINK)) {
# ifdef UNIX
bool file_info_link_ok = os_fileinfo_link((char *)fname, &file_info);
/* Symlinks. */
if ((bkc & BKC_BREAKSYMLINK)
&& file_info_link_ok
&& !os_fileinfo_id_equal(&file_info, &file_info_old)) {
backup_copy = FALSE;
}
/* Hardlinks. */
if ((bkc & BKC_BREAKHARDLINK)
&& os_fileinfo_hardlinks(&file_info_old) > 1
&& (!file_info_link_ok
|| os_fileinfo_id_equal(&file_info, &file_info_old))) {
backup_copy = FALSE;
}
# endif
}
/* make sure we have a valid backup extension to use */
if (*p_bex == NUL)
backup_ext = (char_u *)".bak";
else
backup_ext = p_bex;
if (backup_copy) {
char_u *wp;
int some_error = false;
char_u *dirp;
char_u *rootname;
char_u *p;
/*
* Try to make the backup in each directory in the 'bdir' option.
*
* Unix semantics has it, that we may have a writable file,
* that cannot be recreated with a simple open(..., O_CREAT, ) e.g:
* - the directory is not writable,
* - the file may be a symbolic link,
* - the file may belong to another user/group, etc.
*
* For these reasons, the existing writable file must be truncated
* and reused. Creation of a backup COPY will be attempted.
*/
dirp = p_bdir;
while (*dirp) {
/*
* Isolate one directory name, using an entry in 'bdir'.
*/
(void)copy_option_part(&dirp, IObuff, IOSIZE, ",");
p = IObuff + STRLEN(IObuff);
if (after_pathsep((char *)IObuff, (char *)p) && p[-1] == p[-2]) {
// Ends with '//', Use Full path
if ((p = (char_u *)make_percent_swname((char *)IObuff, (char *)fname))
!= NULL) {
backup = (char_u *)modname((char *)p, (char *)backup_ext,
no_prepend_dot);
xfree(p);
}
}
rootname = get_file_in_dir(fname, IObuff);
if (rootname == NULL) {
some_error = TRUE; /* out of memory */
goto nobackup;
}
FileInfo file_info_new;
{
//
// Make the backup file name.
//
if (backup == NULL) {
backup = (char_u *)modname((char *)rootname, (char *)backup_ext,
no_prepend_dot);
}
if (backup == NULL) {
xfree(rootname);
some_error = TRUE; /* out of memory */
goto nobackup;
}
/*
* Check if backup file already exists.
*/
if (os_fileinfo((char *)backup, &file_info_new)) {
if (os_fileinfo_id_equal(&file_info_new, &file_info_old)) {
//
// Backup file is same as original file.
// May happen when modname() gave the same file back (e.g. silly
// link). If we don't check here, we either ruin the file when
// copying or erase it after writing.
//
XFREE_CLEAR(backup); // no backup file to delete
} else if (!p_bk) {
// We are not going to keep the backup file, so don't
// delete an existing one, and try to use another name instead.
// Change one character, just before the extension.
//
wp = backup + STRLEN(backup) - 1 - STRLEN(backup_ext);
if (wp < backup) { // empty file name ???
wp = backup;
}
*wp = 'z';
while (*wp > 'a'
&& os_fileinfo((char *)backup, &file_info_new)) {
--*wp;
}
// They all exist??? Must be something wrong.
if (*wp == 'a') {
XFREE_CLEAR(backup);
}
}
}
}
xfree(rootname);
/*
* Try to create the backup file
*/
if (backup != NULL) {
/* remove old backup, if present */
os_remove((char *)backup);
// set file protection same as original file, but
// strip s-bit.
(void)os_setperm((const char *)backup, perm & 0777);
#ifdef UNIX
//
// Try to set the group of the backup same as the original file. If
// this fails, set the protection bits for the group same as the
// protection bits for others.
//
if (file_info_new.stat.st_gid != file_info_old.stat.st_gid
&& os_chown((char *)backup, -1, file_info_old.stat.st_gid) != 0) {
os_setperm((const char *)backup,
(perm & 0707) | ((perm & 07) << 3));
}
#endif
// copy the file
if (os_copy((char *)fname, (char *)backup, UV_FS_COPYFILE_FICLONE)
!= 0) {
SET_ERRMSG(_("E506: Can't write to backup file "
"(add ! to override)"));
}
#ifdef UNIX
os_file_settime((char *)backup,
file_info_old.stat.st_atim.tv_sec,
file_info_old.stat.st_mtim.tv_sec);
#endif
#ifdef HAVE_ACL
mch_set_acl(backup, acl);
#endif
break;
}
}
nobackup:
if (backup == NULL && errmsg == NULL) {
SET_ERRMSG(_(
"E509: Cannot create backup file (add ! to override)"));
}
// Ignore errors when forceit is TRUE.
if ((some_error || errmsg != NULL) && !forceit) {
retval = FAIL;
goto fail;
}
SET_ERRMSG(NULL);
} else {
char_u *dirp;
char_u *p;
char_u *rootname;
/*
* Make a backup by renaming the original file.
*/
/*
* If 'cpoptions' includes the "W" flag, we don't want to
* overwrite a read-only file. But rename may be possible
* anyway, thus we need an extra check here.
*/
if (file_readonly && vim_strchr(p_cpo, CPO_FWRITE) != NULL) {
SET_ERRMSG_NUM("E504", _(err_readonly));
goto fail;
}
/*
*
* Form the backup file name - change path/fo.o.h to
* path/fo.o.h.bak Try all directories in 'backupdir', first one
* that works is used.
*/
dirp = p_bdir;
while (*dirp) {
/*
* Isolate one directory name and make the backup file name.
*/
(void)copy_option_part(&dirp, IObuff, IOSIZE, ",");
p = IObuff + STRLEN(IObuff);
if (after_pathsep((char *)IObuff, (char *)p) && p[-1] == p[-2]) {
// path ends with '//', use full path
if ((p = (char_u *)make_percent_swname((char *)IObuff, (char *)fname))
!= NULL) {
backup = (char_u *)modname((char *)p, (char *)backup_ext,
no_prepend_dot);
xfree(p);
}
}
if (backup == NULL) {
rootname = get_file_in_dir(fname, IObuff);
if (rootname == NULL) {
backup = NULL;
} else {
backup = (char_u *)modname((char *)rootname, (char *)backup_ext,
no_prepend_dot);
xfree(rootname);
}
}
if (backup != NULL) {
/*
* If we are not going to keep the backup file, don't
* delete an existing one, try to use another name.
* Change one character, just before the extension.
*/
if (!p_bk && os_path_exists(backup)) {
p = backup + STRLEN(backup) - 1 - STRLEN(backup_ext);
if (p < backup) /* empty file name ??? */
p = backup;
*p = 'z';
while (*p > 'a' && os_path_exists(backup)) {
(*p)--;
}
// They all exist??? Must be something wrong!
if (*p == 'a') {
XFREE_CLEAR(backup);
}
}
}
if (backup != NULL) {
// Delete any existing backup and move the current version
// to the backup. For safety, we don't remove the backup
// until the write has finished successfully. And if the
// 'backup' option is set, leave it around.
// If the renaming of the original file to the backup file
// works, quit here.
///
if (vim_rename(fname, backup) == 0) {
break;
}
XFREE_CLEAR(backup); // don't do the rename below
}
}
if (backup == NULL && !forceit) {
SET_ERRMSG(_("E510: Can't make backup file (add ! to override)"));
goto fail;
}
}
}
#if defined(UNIX)
// When using ":w!" and the file was read-only: make it writable
if (forceit && perm >= 0 && !(perm & 0200)
&& file_info_old.stat.st_uid == getuid()
&& vim_strchr(p_cpo, CPO_FWRITE) == NULL) {
perm |= 0200;
(void)os_setperm((const char *)fname, perm);
made_writable = true;
}
#endif
// When using ":w!" and writing to the current file, 'readonly' makes no
// sense, reset it, unless 'Z' appears in 'cpoptions'.
if (forceit && overwriting && vim_strchr(p_cpo, CPO_KEEPRO) == NULL) {
buf->b_p_ro = false;
need_maketitle = true; // set window title later
status_redraw_all(); // redraw status lines later
}
if (end > buf->b_ml.ml_line_count)
end = buf->b_ml.ml_line_count;
if (buf->b_ml.ml_flags & ML_EMPTY)
start = end + 1;
// If the original file is being overwritten, there is a small chance that
// we crash in the middle of writing. Therefore the file is preserved now.
// This makes all block numbers positive so that recovery does not need
// the original file.
// Don't do this if there is a backup file and we are exiting.
if (reset_changed && !newfile && overwriting
&& !(exiting && backup != NULL)) {
ml_preserve(buf, false, !!p_fs);
if (got_int) {
SET_ERRMSG(_(e_interr));
goto restore_backup;
}
}
// Default: write the file directly. May write to a temp file for
// multi-byte conversion.
wfname = fname;
// Check for forced 'fileencoding' from "++opt=val" argument.
if (eap != NULL && eap->force_enc != 0) {
fenc = eap->cmd + eap->force_enc;
fenc = enc_canonize(fenc);
fenc_tofree = fenc;
} else {
fenc = buf->b_p_fenc;
}
// Check if the file needs to be converted.
converted = need_conversion(fenc);
// Check if UTF-8 to UCS-2/4 or Latin1 conversion needs to be done. Or
// Latin1 to Unicode conversion. This is handled in buf_write_bytes().
// Prepare the flags for it and allocate bw_conv_buf when needed.
if (converted && (enc_utf8 || STRCMP(p_enc, "latin1") == 0)) {
wb_flags = get_fio_flags(fenc);
if (wb_flags & (FIO_UCS2 | FIO_UCS4 | FIO_UTF16 | FIO_UTF8)) {
// Need to allocate a buffer to translate into.
if (wb_flags & (FIO_UCS2 | FIO_UTF16 | FIO_UTF8)) {
write_info.bw_conv_buflen = bufsize * 2;
} else { // FIO_UCS4
write_info.bw_conv_buflen = bufsize * 4;
}
write_info.bw_conv_buf = verbose_try_malloc(write_info.bw_conv_buflen);
if (!write_info.bw_conv_buf) {
end = 0;
}
}
}
if (converted && wb_flags == 0) {
# ifdef HAVE_ICONV
// Use iconv() conversion when conversion is needed and it's not done
// internally.
write_info.bw_iconv_fd = (iconv_t)my_iconv_open(fenc,
enc_utf8 ? (char_u *)"utf-8" : p_enc);
if (write_info.bw_iconv_fd != (iconv_t)-1) {
/* We're going to use iconv(), allocate a buffer to convert in. */
write_info.bw_conv_buflen = bufsize * ICONV_MULT;
write_info.bw_conv_buf = verbose_try_malloc(write_info.bw_conv_buflen);
if (!write_info.bw_conv_buf) {
end = 0;
}
write_info.bw_first = TRUE;
} else
# endif
/*
* When the file needs to be converted with 'charconvert' after
* writing, write to a temp file instead and let the conversion
* overwrite the original file.
*/
if (*p_ccv != NUL) {
wfname = vim_tempname();
if (wfname == NULL) { // Can't write without a tempfile!
SET_ERRMSG(_("E214: Can't find temp file for writing"));
goto restore_backup;
}
}
}
if (converted && wb_flags == 0
# ifdef HAVE_ICONV
&& write_info.bw_iconv_fd == (iconv_t)-1
# endif
&& wfname == fname
) {
if (!forceit) {
SET_ERRMSG(_(
"E213: Cannot convert (add ! to write without conversion)"));
goto restore_backup;
}
notconverted = TRUE;
}
// If conversion is taking place, we may first pretend to write and check
// for conversion errors. Then loop again to write for real.
// When not doing conversion this writes for real right away.
for (checking_conversion = true; ; checking_conversion = false) {
// There is no need to check conversion when:
// - there is no conversion
// - we make a backup file, that can be restored in case of conversion
// failure.
if (!converted || dobackup) {
checking_conversion = false;
}
if (checking_conversion) {
// Make sure we don't write anything.
fd = -1;
write_info.bw_fd = fd;
} else {
// Open the file "wfname" for writing.
// We may try to open the file twice: If we can't write to the file
// and forceit is TRUE we delete the existing file and try to
// create a new one. If this still fails we may have lost the
// original file! (this may happen when the user reached his
// quotum for number of files).
// Appending will fail if the file does not exist and forceit is
// FALSE.
while ((fd = os_open((char *)wfname,
O_WRONLY |
(append ?
(forceit ? (O_APPEND | O_CREAT) : O_APPEND)
: (O_CREAT | O_TRUNC))
, perm < 0 ? 0666 : (perm & 0777))) < 0) {
// A forced write will try to create a new file if the old one
// is still readonly. This may also happen when the directory
// is read-only. In that case the mch_remove() will fail.
if (errmsg == NULL) {
#ifdef UNIX
FileInfo file_info;
// Don't delete the file when it's a hard or symbolic link.
if ((!newfile && os_fileinfo_hardlinks(&file_info_old) > 1)
|| (os_fileinfo_link((char *)fname, &file_info)
&& !os_fileinfo_id_equal(&file_info, &file_info_old))) {
SET_ERRMSG(_("E166: Can't open linked file for writing"));
} else {
#endif
SET_ERRMSG_ARG(_("E212: Can't open file for writing: %s"), fd);
if (forceit && vim_strchr(p_cpo, CPO_FWRITE) == NULL
&& perm >= 0) {
#ifdef UNIX
// we write to the file, thus it should be marked
// writable after all
if (!(perm & 0200)) {
made_writable = true;
}
perm |= 0200;
if (file_info_old.stat.st_uid != getuid()
|| file_info_old.stat.st_gid != getgid()) {
perm &= 0777;
}
#endif
if (!append) { // don't remove when appending
os_remove((char *)wfname);
}
continue;
}
#ifdef UNIX
}
#endif
}
restore_backup:
{
// If we failed to open the file, we don't need a backup. Throw it
// away. If we moved or removed the original file try to put the
// backup in its place.
if (backup != NULL && wfname == fname) {
if (backup_copy) {
// There is a small chance that we removed the original,
// try to move the copy in its place.
// This may not work if the vim_rename() fails.
// In that case we leave the copy around.
// If file does not exist, put the copy in its place
if (!os_path_exists(fname)) {
vim_rename(backup, fname);
}
// if original file does exist throw away the copy
if (os_path_exists(fname)) {
os_remove((char *)backup);
}
} else {
// try to put the original file back
vim_rename(backup, fname);
}
}
// if original file no longer exists give an extra warning
if (!newfile && !os_path_exists(fname)) {
end = 0;
}
}
if (wfname != fname) {
xfree(wfname);
}
goto fail;
}
write_info.bw_fd = fd;
}
SET_ERRMSG(NULL);
write_info.bw_buf = buffer;
nchars = 0;
// use "++bin", "++nobin" or 'binary'
if (eap != NULL && eap->force_bin != 0) {
write_bin = (eap->force_bin == FORCE_BIN);
} else {
write_bin = buf->b_p_bin;
}
// Skip the BOM when appending and the file already existed, the BOM
// only makes sense at the start of the file.
if (buf->b_p_bomb && !write_bin && (!append || perm < 0)) {
write_info.bw_len = make_bom(buffer, fenc);
if (write_info.bw_len > 0) {
// don't convert
write_info.bw_flags = FIO_NOCONVERT | wb_flags;
if (buf_write_bytes(&write_info) == FAIL) {
end = 0;
} else {
nchars += write_info.bw_len;
}
}
}
write_info.bw_start_lnum = start;
write_undo_file = (buf->b_p_udf && overwriting && !append
&& !filtering && reset_changed && !checking_conversion);
if (write_undo_file) {
// Prepare for computing the hash value of the text.
sha256_start(&sha_ctx);
}
write_info.bw_len = bufsize;
#ifdef HAS_BW_FLAGS
write_info.bw_flags = wb_flags;
#endif
fileformat = get_fileformat_force(buf, eap);
s = buffer;
len = 0;
for (lnum = start; lnum <= end; lnum++) {
// The next while loop is done once for each character written.
// Keep it fast!
ptr = ml_get_buf(buf, lnum, false) - 1;
if (write_undo_file) {
sha256_update(&sha_ctx, ptr + 1, (uint32_t)(STRLEN(ptr + 1) + 1));
}
while ((c = *++ptr) != NUL) {
if (c == NL) {
*s = NUL; // replace newlines with NULs
} else if (c == CAR && fileformat == EOL_MAC) {
*s = NL; // Mac: replace CRs with NLs
} else {
*s = c;
}
s++;
if (++len != bufsize) {
continue;
}
if (buf_write_bytes(&write_info) == FAIL) {
end = 0; // write error: break loop
break;
}
nchars += bufsize;
s = buffer;
len = 0;
write_info.bw_start_lnum = lnum;
}
// write failed or last line has no EOL: stop here
if (end == 0
|| (lnum == end
&& (write_bin || !buf->b_p_fixeol)
&& (lnum == buf->b_no_eol_lnum
|| (lnum == buf->b_ml.ml_line_count && !buf->b_p_eol)))) {
lnum++; // written the line, count it
no_eol = true;
break;
}
if (fileformat == EOL_UNIX) {
*s++ = NL;
} else {
*s++ = CAR; // EOL_MAC or EOL_DOS: write CR
if (fileformat == EOL_DOS) { // write CR-NL
if (++len == bufsize) {
if (buf_write_bytes(&write_info) == FAIL) {
end = 0; // write error: break loop
break;
}
nchars += bufsize;
s = buffer;
len = 0;
}
*s++ = NL;
}
}
if (++len == bufsize) {
if (buf_write_bytes(&write_info) == FAIL) {
end = 0; // Write error: break loop.
break;
}
nchars += bufsize;
s = buffer;
len = 0;
os_breakcheck();
if (got_int) {
end = 0; // Interrupted, break loop.
break;
}
}
}
if (len > 0 && end > 0) {
write_info.bw_len = len;
if (buf_write_bytes(&write_info) == FAIL) {
end = 0; // write error
}
nchars += len;
}
// Stop when writing done or an error was encountered.
if (!checking_conversion || end == 0) {
break;
}
// If no error happened until now, writing should be ok, so loop to
// really write the buffer.
}
// If we started writing, finish writing. Also when an error was
// encountered.
if (!checking_conversion) {
// On many journalling file systems there is a bug that causes both the
// original and the backup file to be lost when halting the system right
// after writing the file. That's because only the meta-data is
// journalled. Syncing the file slows down the system, but assures it has
// been written to disk and we don't lose it.
// For a device do try the fsync() but don't complain if it does not work
// (could be a pipe).
// If the 'fsync' option is FALSE, don't fsync(). Useful for laptops.
int error;
if (p_fs && (error = os_fsync(fd)) != 0 && !device
// fsync not supported on this storage.
&& error != UV_ENOTSUP) {
SET_ERRMSG_ARG(e_fsync, error);
end = 0;
}
#ifdef UNIX
// When creating a new file, set its owner/group to that of the original
// file. Get the new device and inode number.
if (backup != NULL && !backup_copy) {
// don't change the owner when it's already OK, some systems remove
// permission or ACL stuff
FileInfo file_info;
if (!os_fileinfo((char *)wfname, &file_info)
|| file_info.stat.st_uid != file_info_old.stat.st_uid
|| file_info.stat.st_gid != file_info_old.stat.st_gid) {
os_fchown(fd, file_info_old.stat.st_uid, file_info_old.stat.st_gid);
if (perm >= 0) { // Set permission again, may have changed.
(void)os_setperm((const char *)wfname, perm);
}
}
buf_set_file_id(buf);
} else if (!buf->file_id_valid) {
// Set the file_id when creating a new file.
buf_set_file_id(buf);
}
#endif
if ((error = os_close(fd)) != 0) {
SET_ERRMSG_ARG(_("E512: Close failed: %s"), error);
end = 0;
}
#ifdef UNIX
if (made_writable) {
perm &= ~0200; // reset 'w' bit for security reasons
}
#endif
if (perm >= 0) { // Set perm. of new file same as old file.
(void)os_setperm((const char *)wfname, perm);
}
#ifdef HAVE_ACL
// Probably need to set the ACL before changing the user (can't set the
// ACL on a file the user doesn't own).
if (!backup_copy) {
mch_set_acl(wfname, acl);
}
#endif
if (wfname != fname) {
// The file was written to a temp file, now it needs to be converted
// with 'charconvert' to (overwrite) the output file.
if (end != 0) {
if (eval_charconvert(enc_utf8 ? "utf-8" : (char *)p_enc, (char *)fenc,
(char *)wfname, (char *)fname) == FAIL) {
write_info.bw_conv_error = true;
end = 0;
}
}
os_remove((char *)wfname);
xfree(wfname);
}
}
if (end == 0) {
// Error encountered.
if (errmsg == NULL) {
if (write_info.bw_conv_error) {
if (write_info.bw_conv_error_lnum == 0) {
SET_ERRMSG(_(
"E513: write error, conversion failed "
"(make 'fenc' empty to override)"));
} else {
errmsg_allocated = true;
SET_ERRMSG(xmalloc(300));
vim_snprintf(
errmsg, 300,
_("E513: write error, conversion failed in line %" PRIdLINENR
" (make 'fenc' empty to override)"),
write_info.bw_conv_error_lnum);
}
} else if (got_int) {
SET_ERRMSG(_(e_interr));
} else {
SET_ERRMSG(_("E514: write error (file system full?)"));
}
}
// If we have a backup file, try to put it in place of the new file,
// because the new file is probably corrupt. This avoids losing the
// original file when trying to make a backup when writing the file a
// second time.
// When "backup_copy" is set we need to copy the backup over the new
// file. Otherwise rename the backup file.
// If this is OK, don't give the extra warning message.
if (backup != NULL) {
if (backup_copy) {
// This may take a while, if we were interrupted let the user
// know we got the message.
if (got_int) {
MSG(_(e_interr));
ui_flush();
}
// copy the file.
if (os_copy((char *)backup, (char *)fname, UV_FS_COPYFILE_FICLONE)
== 0) {
end = 1; // success
}
} else {
if (vim_rename(backup, fname) == 0) {
end = 1;
}
}
}
goto fail;
}
lnum -= start; /* compute number of written lines */
--no_wait_return; /* may wait for return now */
#if !defined(UNIX)
fname = sfname; /* use shortname now, for the messages */
#endif
if (!filtering) {
add_quoted_fname((char *)IObuff, IOSIZE, buf, (const char *)fname);
c = false;
if (write_info.bw_conv_error) {
STRCAT(IObuff, _(" CONVERSION ERROR"));
c = TRUE;
if (write_info.bw_conv_error_lnum != 0)
vim_snprintf_add((char *)IObuff, IOSIZE, _(" in line %" PRId64 ";"),
(int64_t)write_info.bw_conv_error_lnum);
} else if (notconverted) {
STRCAT(IObuff, _("[NOT converted]"));
c = TRUE;
} else if (converted) {
STRCAT(IObuff, _("[converted]"));
c = TRUE;
}
if (device) {
STRCAT(IObuff, _("[Device]"));
c = TRUE;
} else if (newfile) {
STRCAT(IObuff, new_file_message());
c = true;
}
if (no_eol) {
msg_add_eol();
c = TRUE;
}
/* may add [unix/dos/mac] */
if (msg_add_fileformat(fileformat))
c = TRUE;
msg_add_lines(c, (long)lnum, nchars); /* add line/char count */
if (!shortmess(SHM_WRITE)) {
if (append)
STRCAT(IObuff, shortmess(SHM_WRI) ? _(" [a]") : _(" appended"));
else
STRCAT(IObuff, shortmess(SHM_WRI) ? _(" [w]") : _(" written"));
}
set_keep_msg(msg_trunc_attr(IObuff, FALSE, 0), 0);
}
/* When written everything correctly: reset 'modified'. Unless not
* writing to the original file and '+' is not in 'cpoptions'. */
if (reset_changed && whole && !append
&& !write_info.bw_conv_error
&& (overwriting || vim_strchr(p_cpo, CPO_PLUS) != NULL)) {
unchanged(buf, true, false);
const varnumber_T changedtick = buf_get_changedtick(buf);
if (buf->b_last_changedtick + 1 == changedtick) {
// b:changedtick may be incremented in unchanged() but that
// should not trigger a TextChanged event.
buf->b_last_changedtick = changedtick;
}
u_unchanged(buf);
u_update_save_nr(buf);
}
/*
* If written to the current file, update the timestamp of the swap file
* and reset the BF_WRITE_MASK flags. Also sets buf->b_mtime.
*/
if (overwriting) {
ml_timestamp(buf);
if (append)
buf->b_flags &= ~BF_NEW;
else
buf->b_flags &= ~BF_WRITE_MASK;
}
/*
* If we kept a backup until now, and we are in patch mode, then we make
* the backup file our 'original' file.
*/
if (*p_pm && dobackup) {
char *org = modname((char *)fname, (char *)p_pm, FALSE);
if (backup != NULL) {
/*
* If the original file does not exist yet
* the current backup file becomes the original file
*/
if (org == NULL) {
EMSG(_("E205: Patchmode: can't save original file"));
} else if (!os_path_exists((char_u *)org)) {
vim_rename(backup, (char_u *)org);
XFREE_CLEAR(backup); // don't delete the file
#ifdef UNIX
os_file_settime(org,
file_info_old.stat.st_atim.tv_sec,
file_info_old.stat.st_mtim.tv_sec);
#endif
}
}
/*
* If there is no backup file, remember that a (new) file was
* created.
*/
else {
int empty_fd;
if (org == NULL
|| (empty_fd = os_open(org,
O_CREAT | O_EXCL | O_NOFOLLOW,
perm < 0 ? 0666 : (perm & 0777))) < 0)
EMSG(_("E206: patchmode: can't touch empty original file"));
else
close(empty_fd);
}
if (org != NULL) {
os_setperm(org, os_getperm((const char *)fname) & 0777);
xfree(org);
}
}
/*
* Remove the backup unless 'backup' option is set
*/
if (!p_bk && backup != NULL
&& !write_info.bw_conv_error
&& os_remove((char *)backup) != 0) {
EMSG(_("E207: Can't delete backup file"));
}
goto nofail;
/*
* Finish up. We get here either after failure or success.
*/
fail:
--no_wait_return; /* may wait for return now */
nofail:
/* Done saving, we accept changed buffer warnings again */
buf->b_saving = false;
xfree(backup);
if (buffer != smallbuf)
xfree(buffer);
xfree(fenc_tofree);
xfree(write_info.bw_conv_buf);
# ifdef HAVE_ICONV
if (write_info.bw_iconv_fd != (iconv_t)-1) {
iconv_close(write_info.bw_iconv_fd);
write_info.bw_iconv_fd = (iconv_t)-1;
}
# endif
#ifdef HAVE_ACL
mch_free_acl(acl);
#endif
if (errmsg != NULL) {
// - 100 to save some space for further error message
#ifndef UNIX
add_quoted_fname((char *)IObuff, IOSIZE - 100, buf, (const char *)sfname);
#else
add_quoted_fname((char *)IObuff, IOSIZE - 100, buf, (const char *)fname);
#endif
if (errnum != NULL) {
if (errmsgarg != 0) {
emsgf("%s: %s%s: %s", errnum, IObuff, errmsg, os_strerror(errmsgarg));
} else {
emsgf("%s: %s%s", errnum, IObuff, errmsg);
}
} else if (errmsgarg != 0) {
emsgf(errmsg, os_strerror(errmsgarg));
} else {
EMSG(errmsg);
}
if (errmsg_allocated) {
xfree(errmsg);
}
retval = FAIL;
if (end == 0) {
const int attr = HL_ATTR(HLF_E); // Set highlight for error messages.
MSG_PUTS_ATTR(_("\nWARNING: Original file may be lost or damaged\n"),
attr | MSG_HIST);
MSG_PUTS_ATTR(_(
"don't quit the editor until the file is successfully written!"),
attr | MSG_HIST);
/* Update the timestamp to avoid an "overwrite changed file"
* prompt when writing again. */
if (os_fileinfo((char *)fname, &file_info_old)) {
buf_store_file_info(buf, &file_info_old);
buf->b_mtime_read = buf->b_mtime;
}
}
}
msg_scroll = msg_save;
/*
* When writing the whole file and 'undofile' is set, also write the undo
* file.
*/
if (retval == OK && write_undo_file) {
char_u hash[UNDO_HASH_SIZE];
sha256_finish(&sha_ctx, hash);
u_write_undo(NULL, FALSE, buf, hash);
}
if (!should_abort(retval)) {
aco_save_T aco;
curbuf->b_no_eol_lnum = 0; /* in case it was set by the previous read */
/*
* Apply POST autocommands.
* Careful: The autocommands may call buf_write() recursively!
*/
aucmd_prepbuf(&aco, buf);
if (append)
apply_autocmds_exarg(EVENT_FILEAPPENDPOST, fname, fname,
FALSE, curbuf, eap);
else if (filtering)
apply_autocmds_exarg(EVENT_FILTERWRITEPOST, NULL, fname,
FALSE, curbuf, eap);
else if (reset_changed && whole)
apply_autocmds_exarg(EVENT_BUFWRITEPOST, fname, fname,
FALSE, curbuf, eap);
else
apply_autocmds_exarg(EVENT_FILEWRITEPOST, fname, fname,
FALSE, curbuf, eap);
/* restore curwin/curbuf and a few other things */
aucmd_restbuf(&aco);
if (aborting()) /* autocmds may abort script processing */
retval = FALSE;
}
got_int |= prev_got_int;
return retval;
#undef SET_ERRMSG
#undef SET_ERRMSG_ARG
#undef SET_ERRMSG_NUM
}
/*
* Set the name of the current buffer. Use when the buffer doesn't have a
* name and a ":r" or ":w" command with a file name is used.
*/
static int set_rw_fname(char_u *fname, char_u *sfname)
{
buf_T *buf = curbuf;
/* It's like the unnamed buffer is deleted.... */
if (curbuf->b_p_bl)
apply_autocmds(EVENT_BUFDELETE, NULL, NULL, FALSE, curbuf);
apply_autocmds(EVENT_BUFWIPEOUT, NULL, NULL, FALSE, curbuf);
if (aborting()) /* autocmds may abort script processing */
return FAIL;
if (curbuf != buf) {
/* We are in another buffer now, don't do the renaming. */
EMSG(_(e_auchangedbuf));
return FAIL;
}
if (setfname(curbuf, fname, sfname, false) == OK) {
curbuf->b_flags |= BF_NOTEDITED;
}
/* ....and a new named one is created */
apply_autocmds(EVENT_BUFNEW, NULL, NULL, FALSE, curbuf);
if (curbuf->b_p_bl)
apply_autocmds(EVENT_BUFADD, NULL, NULL, FALSE, curbuf);
if (aborting()) /* autocmds may abort script processing */
return FAIL;
/* Do filetype detection now if 'filetype' is empty. */
if (*curbuf->b_p_ft == NUL) {
if (au_has_group((char_u *)"filetypedetect")) {
(void)do_doautocmd((char_u *)"filetypedetect BufRead", false, NULL);
}
do_modelines(0);
}
return OK;
}
/// Put file name into the specified buffer with quotes
///
/// Replaces home directory at the start with `~`.
///
/// @param[out] ret_buf Buffer to save results to.
/// @param[in] buf_len ret_buf length.
/// @param[in] buf buf_T file name is coming from.
/// @param[in] fname File name to write.
static void add_quoted_fname(char *const ret_buf, const size_t buf_len,
const buf_T *const buf, const char *fname)
FUNC_ATTR_NONNULL_ARG(1)
{
if (fname == NULL) {
fname = "-stdin-";
}
ret_buf[0] = '"';
home_replace(buf, (const char_u *)fname, (char_u *)ret_buf + 1,
(int)buf_len - 4, true);
xstrlcat(ret_buf, "\" ", buf_len);
}
/// Append message for text mode to IObuff.
///
/// @param eol_type line ending type
///
/// @return true if something was appended.
static bool msg_add_fileformat(int eol_type)
{
#ifndef USE_CRNL
if (eol_type == EOL_DOS) {
STRCAT(IObuff, shortmess(SHM_TEXT) ? _("[dos]") : _("[dos format]"));
return true;
}
#endif
if (eol_type == EOL_MAC) {
STRCAT(IObuff, shortmess(SHM_TEXT) ? _("[mac]") : _("[mac format]"));
return true;
}
#ifdef USE_CRNL
if (eol_type == EOL_UNIX) {
STRCAT(IObuff, shortmess(SHM_TEXT) ? _("[unix]") : _("[unix format]"));
return true;
}
#endif
return false;
}
/*
* Append line and character count to IObuff.
*/
void msg_add_lines(int insert_space, long lnum, off_T nchars)
{
char_u *p;
p = IObuff + STRLEN(IObuff);
if (insert_space)
*p++ = ' ';
if (shortmess(SHM_LINES)) {
sprintf((char *)p, "%" PRId64 "L, %" PRId64 "C",
(int64_t)lnum, (int64_t)nchars);
}
else {
if (lnum == 1)
STRCPY(p, _("1 line, "));
else
sprintf((char *)p, _("%" PRId64 " lines, "), (int64_t)lnum);
p += STRLEN(p);
if (nchars == 1)
STRCPY(p, _("1 character"));
else {
sprintf((char *)p, _("%" PRId64 " characters"), (int64_t)nchars);
}
}
}
/*
* Append message for missing line separator to IObuff.
*/
static void msg_add_eol(void)
{
STRCAT(IObuff,
shortmess(SHM_LAST) ? _("[noeol]") : _("[Incomplete last line]"));
}
/*
* Check modification time of file, before writing to it.
* The size isn't checked, because using a tool like "gzip" takes care of
* using the same timestamp but can't set the size.
*/
static int check_mtime(buf_T *buf, FileInfo *file_info)
{
if (buf->b_mtime_read != 0
&& time_differs(file_info->stat.st_mtim.tv_sec,
buf->b_mtime_read)) {
msg_scroll = true; // Don't overwrite messages here.
msg_silent = 0; // Must give this prompt.
// Don't use emsg() here, don't want to flush the buffers.
msg_attr(_("WARNING: The file has been changed since reading it!!!"),
HL_ATTR(HLF_E));
if (ask_yesno(_("Do you really want to write to it"), true) == 'n') {
return FAIL;
}
msg_scroll = false; // Always overwrite the file message now.
}
return OK;
}
/// Return true if the times differ
///
/// @param t1 first time
/// @param t2 second time
static bool time_differs(long t1, long t2) FUNC_ATTR_CONST
{
#if defined(__linux__) || defined(MSWIN)
/* On a FAT filesystem, esp. under Linux, there are only 5 bits to store
* the seconds. Since the roundoff is done when flushing the inode, the
* time may change unexpectedly by one second!!! */
return t1 - t2 > 1 || t2 - t1 > 1;
#else
return t1 != t2;
#endif
}
/*
* Call write() to write a number of bytes to the file.
* Handles 'encoding' conversion.
*
* Return FAIL for failure, OK otherwise.
*/
static int buf_write_bytes(struct bw_info *ip)
{
int wlen;
char_u *buf = ip->bw_buf; /* data to write */
int len = ip->bw_len; /* length of data */
#ifdef HAS_BW_FLAGS
int flags = ip->bw_flags; /* extra flags */
#endif
/*
* Skip conversion when writing the BOM.
*/
if (!(flags & FIO_NOCONVERT)) {
char_u *p;
unsigned c;
int n;
if (flags & FIO_UTF8) {
/*
* Convert latin1 in the buffer to UTF-8 in the file.
*/
p = ip->bw_conv_buf; /* translate to buffer */
for (wlen = 0; wlen < len; ++wlen)
p += utf_char2bytes(buf[wlen], p);
buf = ip->bw_conv_buf;
len = (int)(p - ip->bw_conv_buf);
} else if (flags & (FIO_UCS4 | FIO_UTF16 | FIO_UCS2 | FIO_LATIN1)) {
/*
* Convert UTF-8 bytes in the buffer to UCS-2, UCS-4, UTF-16 or
* Latin1 chars in the file.
*/
if (flags & FIO_LATIN1)
p = buf; /* translate in-place (can only get shorter) */
else
p = ip->bw_conv_buf; /* translate to buffer */
for (wlen = 0; wlen < len; wlen += n) {
if (wlen == 0 && ip->bw_restlen != 0) {
int l;
/* Use remainder of previous call. Append the start of
* buf[] to get a full sequence. Might still be too
* short! */
l = CONV_RESTLEN - ip->bw_restlen;
if (l > len)
l = len;
memmove(ip->bw_rest + ip->bw_restlen, buf, (size_t)l);
n = utf_ptr2len_len(ip->bw_rest, ip->bw_restlen + l);
if (n > ip->bw_restlen + len) {
/* We have an incomplete byte sequence at the end to
* be written. We can't convert it without the
* remaining bytes. Keep them for the next call. */
if (ip->bw_restlen + len > CONV_RESTLEN)
return FAIL;
ip->bw_restlen += len;
break;
}
if (n > 1)
c = utf_ptr2char(ip->bw_rest);
else
c = ip->bw_rest[0];
if (n >= ip->bw_restlen) {
n -= ip->bw_restlen;
ip->bw_restlen = 0;
} else {
ip->bw_restlen -= n;
memmove(ip->bw_rest, ip->bw_rest + n,
(size_t)ip->bw_restlen);
n = 0;
}
} else {
n = utf_ptr2len_len(buf + wlen, len - wlen);
if (n > len - wlen) {
/* We have an incomplete byte sequence at the end to
* be written. We can't convert it without the
* remaining bytes. Keep them for the next call. */
if (len - wlen > CONV_RESTLEN)
return FAIL;
ip->bw_restlen = len - wlen;
memmove(ip->bw_rest, buf + wlen,
(size_t)ip->bw_restlen);
break;
}
if (n > 1)
c = utf_ptr2char(buf + wlen);
else
c = buf[wlen];
}
if (ucs2bytes(c, &p, flags) && !ip->bw_conv_error) {
ip->bw_conv_error = TRUE;
ip->bw_conv_error_lnum = ip->bw_start_lnum;
}
if (c == NL)
++ip->bw_start_lnum;
}
if (flags & FIO_LATIN1)
len = (int)(p - buf);
else {
buf = ip->bw_conv_buf;
len = (int)(p - ip->bw_conv_buf);
}
}
# ifdef HAVE_ICONV
if (ip->bw_iconv_fd != (iconv_t)-1) {
const char *from;
size_t fromlen;
char *to;
size_t tolen;
/* Convert with iconv(). */
if (ip->bw_restlen > 0) {
char *fp;
/* Need to concatenate the remainder of the previous call and
* the bytes of the current call. Use the end of the
* conversion buffer for this. */
fromlen = len + ip->bw_restlen;
fp = (char *)ip->bw_conv_buf + ip->bw_conv_buflen - fromlen;
memmove(fp, ip->bw_rest, (size_t)ip->bw_restlen);
memmove(fp + ip->bw_restlen, buf, (size_t)len);
from = fp;
tolen = ip->bw_conv_buflen - fromlen;
} else {
from = (const char *)buf;
fromlen = len;
tolen = ip->bw_conv_buflen;
}
to = (char *)ip->bw_conv_buf;
if (ip->bw_first) {
size_t save_len = tolen;
/* output the initial shift state sequence */
(void)iconv(ip->bw_iconv_fd, NULL, NULL, &to, &tolen);
/* There is a bug in iconv() on Linux (which appears to be
* wide-spread) which sets "to" to NULL and messes up "tolen".
*/
if (to == NULL) {
to = (char *)ip->bw_conv_buf;
tolen = save_len;
}
ip->bw_first = FALSE;
}
/*
* If iconv() has an error or there is not enough room, fail.
*/
if ((iconv(ip->bw_iconv_fd, (void *)&from, &fromlen, &to, &tolen)
== (size_t)-1 && ICONV_ERRNO != ICONV_EINVAL)
|| fromlen > CONV_RESTLEN) {
ip->bw_conv_error = TRUE;
return FAIL;
}
/* copy remainder to ip->bw_rest[] to be used for the next call. */
if (fromlen > 0)
memmove(ip->bw_rest, (void *)from, fromlen);
ip->bw_restlen = (int)fromlen;
buf = ip->bw_conv_buf;
len = (int)((char_u *)to - ip->bw_conv_buf);
}
# endif
}
if (ip->bw_fd < 0) {
// Only checking conversion, which is OK if we get here.
return OK;
}
wlen = write_eintr(ip->bw_fd, buf, len);
return (wlen < len) ? FAIL : OK;
}
/// Convert a Unicode character to bytes.
///
/// @param c character to convert
/// @param[in,out] pp pointer to store the result at
/// @param flags FIO_ flags that specify which encoding to use
///
/// @return true for an error, false when it's OK.
static bool ucs2bytes(unsigned c, char_u **pp, int flags) FUNC_ATTR_NONNULL_ALL
{
char_u *p = *pp;
bool error = false;
int cc;
if (flags & FIO_UCS4) {
if (flags & FIO_ENDIAN_L) {
*p++ = c;
*p++ = (c >> 8);
*p++ = (c >> 16);
*p++ = (c >> 24);
} else {
*p++ = (c >> 24);
*p++ = (c >> 16);
*p++ = (c >> 8);
*p++ = c;
}
} else if (flags & (FIO_UCS2 | FIO_UTF16)) {
if (c >= 0x10000) {
if (flags & FIO_UTF16) {
/* Make two words, ten bits of the character in each. First
* word is 0xd800 - 0xdbff, second one 0xdc00 - 0xdfff */
c -= 0x10000;
if (c >= 0x100000) {
error = true;
}
cc = ((c >> 10) & 0x3ff) + 0xd800;
if (flags & FIO_ENDIAN_L) {
*p++ = cc;
*p++ = ((unsigned)cc >> 8);
} else {
*p++ = ((unsigned)cc >> 8);
*p++ = cc;
}
c = (c & 0x3ff) + 0xdc00;
} else {
error = true;
}
}
if (flags & FIO_ENDIAN_L) {
*p++ = c;
*p++ = (c >> 8);
} else {
*p++ = (c >> 8);
*p++ = c;
}
} else { /* Latin1 */
if (c >= 0x100) {
error = true;
*p++ = 0xBF;
} else
*p++ = c;
}
*pp = p;
return error;
}
/// Return true if file encoding "fenc" requires conversion from or to
/// 'encoding'.
///
/// @param fenc file encoding to check
///
/// @return true if conversion is required
static bool need_conversion(const char_u *fenc)
FUNC_ATTR_NONNULL_ALL FUNC_ATTR_WARN_UNUSED_RESULT
{
int same_encoding;
int enc_flags;
int fenc_flags;
if (*fenc == NUL || STRCMP(p_enc, fenc) == 0) {
same_encoding = TRUE;
fenc_flags = 0;
} else {
/* Ignore difference between "ansi" and "latin1", "ucs-4" and
* "ucs-4be", etc. */
enc_flags = get_fio_flags(p_enc);
fenc_flags = get_fio_flags(fenc);
same_encoding = (enc_flags != 0 && fenc_flags == enc_flags);
}
if (same_encoding) {
// Specified file encoding matches UTF-8.
return false;
}
/* Encodings differ. However, conversion is not needed when 'enc' is any
* Unicode encoding and the file is UTF-8. */
return !(enc_utf8 && fenc_flags == FIO_UTF8);
}
/// Return the FIO_ flags needed for the internal conversion if 'name' was
/// unicode or latin1, otherwise 0. If "name" is an empty string,
/// use 'encoding'.
///
/// @param name string to check for encoding
static int get_fio_flags(const char_u *name)
{
int prop;
if (*name == NUL) {
name = p_enc;
}
prop = enc_canon_props(name);
if (prop & ENC_UNICODE) {
if (prop & ENC_2BYTE) {
if (prop & ENC_ENDIAN_L)
return FIO_UCS2 | FIO_ENDIAN_L;
return FIO_UCS2;
}
if (prop & ENC_4BYTE) {
if (prop & ENC_ENDIAN_L)
return FIO_UCS4 | FIO_ENDIAN_L;
return FIO_UCS4;
}
if (prop & ENC_2WORD) {
if (prop & ENC_ENDIAN_L)
return FIO_UTF16 | FIO_ENDIAN_L;
return FIO_UTF16;
}
return FIO_UTF8;
}
if (prop & ENC_LATIN1)
return FIO_LATIN1;
/* must be ENC_DBCS, requires iconv() */
return 0;
}
/*
* Check for a Unicode BOM (Byte Order Mark) at the start of p[size].
* "size" must be at least 2.
* Return the name of the encoding and set "*lenp" to the length.
* Returns NULL when no BOM found.
*/
static char_u *check_for_bom(char_u *p, long size, int *lenp, int flags)
{
char *name = NULL;
int len = 2;
if (p[0] == 0xef && p[1] == 0xbb && size >= 3 && p[2] == 0xbf
&& (flags == FIO_ALL || flags == FIO_UTF8 || flags == 0)) {
name = "utf-8"; /* EF BB BF */
len = 3;
} else if (p[0] == 0xff && p[1] == 0xfe) {
if (size >= 4 && p[2] == 0 && p[3] == 0
&& (flags == FIO_ALL || flags == (FIO_UCS4 | FIO_ENDIAN_L))) {
name = "ucs-4le"; /* FF FE 00 00 */
len = 4;
} else if (flags == (FIO_UCS2 | FIO_ENDIAN_L))
name = "ucs-2le"; /* FF FE */
else if (flags == FIO_ALL || flags == (FIO_UTF16 | FIO_ENDIAN_L))
/* utf-16le is preferred, it also works for ucs-2le text */
name = "utf-16le"; /* FF FE */
} else if (p[0] == 0xfe && p[1] == 0xff
&& (flags == FIO_ALL || flags == FIO_UCS2 || flags ==
FIO_UTF16)) {
/* Default to utf-16, it works also for ucs-2 text. */
if (flags == FIO_UCS2)
name = "ucs-2"; /* FE FF */
else
name = "utf-16"; /* FE FF */
} else if (size >= 4 && p[0] == 0 && p[1] == 0 && p[2] == 0xfe
&& p[3] == 0xff && (flags == FIO_ALL || flags == FIO_UCS4)) {
name = "ucs-4"; /* 00 00 FE FF */
len = 4;
}
*lenp = len;
return (char_u *)name;
}
/*
* Generate a BOM in "buf[4]" for encoding "name".
* Return the length of the BOM (zero when no BOM).
*/
static int make_bom(char_u *buf, char_u *name)
{
int flags;
char_u *p;
flags = get_fio_flags(name);
/* Can't put a BOM in a non-Unicode file. */
if (flags == FIO_LATIN1 || flags == 0)
return 0;
if (flags == FIO_UTF8) { /* UTF-8 */
buf[0] = 0xef;
buf[1] = 0xbb;
buf[2] = 0xbf;
return 3;
}
p = buf;
(void)ucs2bytes(0xfeff, &p, flags);
return (int)(p - buf);
}
/// Shorten filename of a buffer.
/// When "force" is TRUE: Use full path from now on for files currently being
/// edited, both for file name and swap file name. Try to shorten the file
/// names a bit, if safe to do so.
/// When "force" is FALSE: Only try to shorten absolute file names.
/// For buffers that have buftype "nofile" or "scratch": never change the file
/// name.
void shorten_buf_fname(buf_T *buf, char_u *dirname, int force)
{
char_u *p;
if (buf->b_fname != NULL
&& !bt_nofile(buf)
&& !path_with_url((char *)buf->b_fname)
&& (force
|| buf->b_sfname == NULL
|| path_is_absolute(buf->b_sfname))) {
XFREE_CLEAR(buf->b_sfname);
p = path_shorten_fname(buf->b_ffname, dirname);
if (p != NULL) {
buf->b_sfname = vim_strsave(p);
buf->b_fname = buf->b_sfname;
}
if (p == NULL) {
buf->b_fname = buf->b_ffname;
}
}
}
/// Shorten filenames for all buffers.
void shorten_fnames(int force)
{
char_u dirname[MAXPATHL];
os_dirname(dirname, MAXPATHL);
FOR_ALL_BUFFERS(buf) {
shorten_buf_fname(buf, dirname, force);
// Always make the swap file name a full path, a "nofile" buffer may
// also have a swap file.
mf_fullname(buf->b_ml.ml_mfp);
}
status_redraw_all();
redraw_tabline = TRUE;
}
/// Get new filename ended by given extension.
///
/// @param fname The original filename.
/// If NULL, use current directory name and ext to
/// compute new filename.
/// @param ext The extension to add to the filename.
/// 4 chars max if prefixed with a dot, 3 otherwise.
/// @param prepend_dot If true, prefix ext with a dot.
/// Does nothing if ext already starts with a dot, or
/// if fname is NULL.
///
/// @return [allocated] - A new filename, made up from:
/// * fname + ext, if fname not NULL.
/// * current dir + ext, if fname is NULL.
/// Result is guaranteed to:
/// * be ended by <ext>.
/// * have a basename with at most BASENAMELEN chars:
/// original basename is truncated if necessary.
/// * be different than original: basename chars are
/// replaced by "_" if necessary. If that can't be done
/// because truncated value of original filename was
/// made of all underscores, replace first "_" by "v".
/// - NULL, if fname is NULL and there was a problem trying
/// to get current directory.
char *modname(const char *fname, const char *ext, bool prepend_dot)
FUNC_ATTR_NONNULL_ARG(2)
{
char *retval;
size_t fnamelen;
size_t extlen = strlen(ext);
// If there is no file name we must get the name of the current directory
// (we need the full path in case :cd is used).
if (fname == NULL || *fname == NUL) {
retval = xmalloc(MAXPATHL + extlen + 3); // +3 for PATHSEP, "_" (Win), NUL
if (os_dirname((char_u *)retval, MAXPATHL) == FAIL
|| (fnamelen = strlen(retval)) == 0) {
xfree(retval);
return NULL;
}
add_pathsep(retval);
fnamelen = strlen(retval);
prepend_dot = FALSE; // nothing to prepend a dot to
} else {
fnamelen = strlen(fname);
retval = xmalloc(fnamelen + extlen + 3);
strcpy(retval, fname);
}
// Search backwards until we hit a '/', '\' or ':'.
// Then truncate what is after the '/', '\' or ':' to BASENAMELEN characters.
char *ptr = NULL;
for (ptr = retval + fnamelen; ptr > retval; MB_PTR_BACK(retval, ptr)) {
if (vim_ispathsep(*ptr)) {
ptr++;
break;
}
}
// the file name has at most BASENAMELEN characters.
if (strlen(ptr) > BASENAMELEN) {
ptr[BASENAMELEN] = '\0';
}
char *s;
s = ptr + strlen(ptr);
// Append the extension.
// ext can start with '.' and cannot exceed 3 more characters.
strcpy(s, ext);
char *e;
// Prepend the dot if needed.
if (prepend_dot && *(e = (char *)path_tail((char_u *)retval)) != '.') {
STRMOVE(e + 1, e);
*e = '.';
}
// Check that, after appending the extension, the file name is really
// different.
if (fname != NULL && strcmp(fname, retval) == 0) {
// we search for a character that can be replaced by '_'
while (--s >= ptr) {
if (*s != '_') {
*s = '_';
break;
}
}
if (s < ptr) { // fname was "________.<ext>", how tricky!
*ptr = 'v';
}
}
return retval;
}
/// Like fgets(), but if the file line is too long, it is truncated and the
/// rest of the line is thrown away.
///
/// @param[out] buf buffer to fill
/// @param size size of the buffer
/// @param fp file to read from
///
/// @return true for EOF or error
bool vim_fgets(char_u *buf, int size, FILE *fp) FUNC_ATTR_NONNULL_ALL
{
char *retval;
assert(size > 0);
buf[size - 2] = NUL;
do {
errno = 0;
retval = fgets((char *)buf, size, fp);
} while (retval == NULL && errno == EINTR && ferror(fp));
if (buf[size - 2] != NUL && buf[size - 2] != '\n') {
char tbuf[200];
buf[size - 1] = NUL; // Truncate the line.
// Now throw away the rest of the line:
do {
tbuf[sizeof(tbuf) - 2] = NUL;
errno = 0;
retval = fgets((char *)tbuf, sizeof(tbuf), fp);
if (retval == NULL && (feof(fp) || errno != EINTR)) {
break;
}
} while (tbuf[sizeof(tbuf) - 2] != NUL && tbuf[sizeof(tbuf) - 2] != '\n');
}
return retval == NULL;
}
/// Read 2 bytes from "fd" and turn them into an int, MSB first.
/// Returns -1 when encountering EOF.
int get2c(FILE *fd)
{
const int n = getc(fd);
if (n == EOF) {
return -1;
}
const int c = getc(fd);
if (c == EOF) {
return -1;
}
return (n << 8) + c;
}
/// Read 3 bytes from "fd" and turn them into an int, MSB first.
/// Returns -1 when encountering EOF.
int get3c(FILE *fd)
{
int n = getc(fd);
if (n == EOF) {
return -1;
}
int c = getc(fd);
if (c == EOF) {
return -1;
}
n = (n << 8) + c;
c = getc(fd);
if (c == EOF) {
return -1;
}
return (n << 8) + c;
}
/// Read 4 bytes from "fd" and turn them into an int, MSB first.
/// Returns -1 when encountering EOF.
int get4c(FILE *fd)
{
// Use unsigned rather than int otherwise result is undefined
// when left-shift sets the MSB.
unsigned n;
int c = getc(fd);
if (c == EOF) {
return -1;
}
n = (unsigned)c;
c = getc(fd);
if (c == EOF) {
return -1;
}
n = (n << 8) + (unsigned)c;
c = getc(fd);
if (c == EOF) {
return -1;
}
n = (n << 8) + (unsigned)c;
c = getc(fd);
if (c == EOF) {
return -1;
}
n = (n << 8) + (unsigned)c;
return (int)n;
}
/// Read 8 bytes from `fd` and turn them into a time_t, MSB first.
/// Returns -1 when encountering EOF.
time_t get8ctime(FILE *fd)
{
time_t n = 0;
for (int i = 0; i < 8; i++) {
const int c = getc(fd);
if (c == EOF) {
return -1;
}
n = (n << 8) + c;
}
return n;
}
/// Reads a string of length "cnt" from "fd" into allocated memory.
/// @return pointer to the string or NULL when unable to read that many bytes.
char *read_string(FILE *fd, size_t cnt)
{
char *str = xmallocz(cnt);
for (size_t i = 0; i < cnt; i++) {
int c = getc(fd);
if (c == EOF) {
xfree(str);
return NULL;
}
str[i] = (char)c;
}
return str;
}
/// Writes a number to file "fd", most significant bit first, in "len" bytes.
/// @returns false in case of an error.
bool put_bytes(FILE *fd, uintmax_t number, size_t len)
{
assert(len > 0);
for (size_t i = len - 1; i < len; i--) {
if (putc((int)(number >> (i * 8)), fd) == EOF) {
return false;
}
}
return true;
}
/// Writes time_t to file "fd" in 8 bytes.
/// @returns FAIL when the write failed.
int put_time(FILE *fd, time_t time_)
{
uint8_t buf[8];
time_to_bytes(time_, buf);
return fwrite(buf, sizeof(uint8_t), ARRAY_SIZE(buf), fd) == 1 ? OK : FAIL;
}
/// os_rename() only works if both files are on the same file system, this
/// function will (attempts to?) copy the file across if rename fails -- webb
///
/// @return -1 for failure, 0 for success
int vim_rename(const char_u *from, const char_u *to)
FUNC_ATTR_NONNULL_ALL
{
int fd_in;
int fd_out;
int n;
char *errmsg = NULL;
char *buffer;
long perm;
#ifdef HAVE_ACL
vim_acl_T acl; /* ACL from original file */
#endif
bool use_tmp_file = false;
/*
* When the names are identical, there is nothing to do. When they refer
* to the same file (ignoring case and slash/backslash differences) but
* the file name differs we need to go through a temp file.
*/
if (fnamecmp(from, to) == 0) {
if (p_fic && (STRCMP(path_tail((char_u *)from), path_tail((char_u *)to))
!= 0)) {
use_tmp_file = true;
} else {
return 0;
}
}
// Fail if the "from" file doesn't exist. Avoids that "to" is deleted.
FileInfo from_info;
if (!os_fileinfo((char *)from, &from_info)) {
return -1;
}
// It's possible for the source and destination to be the same file.
// This happens when "from" and "to" differ in case and are on a FAT32
// filesystem. In that case go through a temp file name.
FileInfo to_info;
if (os_fileinfo((char *)to, &to_info)
&& os_fileinfo_id_equal(&from_info, &to_info)) {
use_tmp_file = true;
}
if (use_tmp_file) {
char_u tempname[MAXPATHL + 1];
/*
* Find a name that doesn't exist and is in the same directory.
* Rename "from" to "tempname" and then rename "tempname" to "to".
*/
if (STRLEN(from) >= MAXPATHL - 5)
return -1;
STRCPY(tempname, from);
for (n = 123; n < 99999; n++) {
char * tail = (char *)path_tail(tempname);
snprintf(tail, (MAXPATHL + 1) - (tail - (char *)tempname - 1), "%d", n);
if (!os_path_exists(tempname)) {
if (os_rename(from, tempname) == OK) {
if (os_rename(tempname, to) == OK)
return 0;
/* Strange, the second step failed. Try moving the
* file back and return failure. */
os_rename(tempname, from);
return -1;
}
/* If it fails for one temp name it will most likely fail
* for any temp name, give up. */
return -1;
}
}
return -1;
}
/*
* Delete the "to" file, this is required on some systems to make the
* os_rename() work, on other systems it makes sure that we don't have
* two files when the os_rename() fails.
*/
os_remove((char *)to);
/*
* First try a normal rename, return if it works.
*/
if (os_rename(from, to) == OK)
return 0;
/*
* Rename() failed, try copying the file.
*/
perm = os_getperm((const char *)from);
#ifdef HAVE_ACL
// For systems that support ACL: get the ACL from the original file.
acl = mch_get_acl(from);
#endif
fd_in = os_open((char *)from, O_RDONLY, 0);
if (fd_in < 0) {
#ifdef HAVE_ACL
mch_free_acl(acl);
#endif
return -1;
}
/* Create the new file with same permissions as the original. */
fd_out = os_open((char *)to,
O_CREAT|O_EXCL|O_WRONLY|O_NOFOLLOW, (int)perm);
if (fd_out < 0) {
close(fd_in);
#ifdef HAVE_ACL
mch_free_acl(acl);
#endif
return -1;
}
// Avoid xmalloc() here as vim_rename() is called by buf_write() when nvim
// is `preserve_exit()`ing.
buffer = try_malloc(BUFSIZE);
if (buffer == NULL) {
close(fd_out);
close(fd_in);
#ifdef HAVE_ACL
mch_free_acl(acl);
#endif
return -1;
}
while ((n = read_eintr(fd_in, buffer, BUFSIZE)) > 0)
if (write_eintr(fd_out, buffer, n) != n) {
errmsg = _("E208: Error writing to \"%s\"");
break;
}
xfree(buffer);
close(fd_in);
if (close(fd_out) < 0)
errmsg = _("E209: Error closing \"%s\"");
if (n < 0) {
errmsg = _("E210: Error reading \"%s\"");
to = from;
}
#ifndef UNIX // For Unix os_open() already set the permission.
os_setperm((const char *)to, perm);
#endif
#ifdef HAVE_ACL
mch_set_acl(to, acl);
mch_free_acl(acl);
#endif
if (errmsg != NULL) {
EMSG2(errmsg, to);
return -1;
}
os_remove((char *)from);
return 0;
}
static int already_warned = FALSE;
// Check if any not hidden buffer has been changed.
// Postpone the check if there are characters in the stuff buffer, a global
// command is being executed, a mapping is being executed or an autocommand is
// busy.
// Returns TRUE if some message was written (screen should be redrawn and
// cursor positioned).
int
check_timestamps(
int focus // called for GUI focus event
)
{
int didit = 0;
int n;
/* Don't check timestamps while system() or another low-level function may
* cause us to lose and gain focus. */
if (no_check_timestamps > 0)
return FALSE;
/* Avoid doing a check twice. The OK/Reload dialog can cause a focus
* event and we would keep on checking if the file is steadily growing.
* Do check again after typing something. */
if (focus && did_check_timestamps) {
need_check_timestamps = TRUE;
return FALSE;
}
if (!stuff_empty() || global_busy || !typebuf_typed()
|| autocmd_busy || curbuf_lock > 0 || allbuf_lock > 0
) {
need_check_timestamps = true; // check later
} else {
no_wait_return++;
did_check_timestamps = true;
already_warned = false;
FOR_ALL_BUFFERS(buf) {
// Only check buffers in a window.
if (buf->b_nwindows > 0) {
bufref_T bufref;
set_bufref(&bufref, buf);
n = buf_check_timestamp(buf, focus);
if (didit < n) {
didit = n;
}
if (n > 0 && !bufref_valid(&bufref)) {
// Autocommands have removed the buffer, start at the first one again.
buf = firstbuf;
continue;
}
}
}
--no_wait_return;
need_check_timestamps = FALSE;
if (need_wait_return && didit == 2) {
// make sure msg isn't overwritten
msg_puts("\n");
ui_flush();
}
}
return didit;
}
/*
* Move all the lines from buffer "frombuf" to buffer "tobuf".
* Return OK or FAIL. When FAIL "tobuf" is incomplete and/or "frombuf" is not
* empty.
*/
static int move_lines(buf_T *frombuf, buf_T *tobuf)
{
buf_T *tbuf = curbuf;
int retval = OK;
linenr_T lnum;
char_u *p;
/* Copy the lines in "frombuf" to "tobuf". */
curbuf = tobuf;
for (lnum = 1; lnum <= frombuf->b_ml.ml_line_count; lnum++) {
p = vim_strsave(ml_get_buf(frombuf, lnum, false));
if (ml_append(lnum - 1, p, 0, false) == FAIL) {
xfree(p);
retval = FAIL;
break;
}
xfree(p);
}
/* Delete all the lines in "frombuf". */
if (retval != FAIL) {
curbuf = frombuf;
for (lnum = curbuf->b_ml.ml_line_count; lnum > 0; lnum--) {
if (ml_delete(lnum, false) == FAIL) {
// Oops! We could try putting back the saved lines, but that
// might fail again...
retval = FAIL;
break;
}
}
}
curbuf = tbuf;
return retval;
}
/*
* Check if buffer "buf" has been changed.
* Also check if the file for a new buffer unexpectedly appeared.
* return 1 if a changed buffer was found.
* return 2 if a message has been displayed.
* return 0 otherwise.
*/
int
buf_check_timestamp(
buf_T *buf,
int focus /* called for GUI focus event */
)
FUNC_ATTR_NONNULL_ALL
{
int retval = 0;
char_u *path;
char *mesg = NULL;
char *mesg2 = "";
bool helpmesg = false;
bool reload = false;
bool can_reload = false;
uint64_t orig_size = buf->b_orig_size;
int orig_mode = buf->b_orig_mode;
static bool busy = false;
char_u *s;
char *reason;
bufref_T bufref;
set_bufref(&bufref, buf);
// If its a terminal, there is no file name, the buffer is not loaded,
// 'buftype' is set, we are in the middle of a save or being called
// recursively: ignore this buffer.
if (buf->terminal
|| buf->b_ffname == NULL
|| buf->b_ml.ml_mfp == NULL
|| !bt_normal(buf)
|| buf->b_saving
|| busy
)
return 0;
FileInfo file_info;
bool file_info_ok;
if (!(buf->b_flags & BF_NOTEDITED)
&& buf->b_mtime != 0
&& (!(file_info_ok = os_fileinfo((char *)buf->b_ffname, &file_info))
|| time_differs(file_info.stat.st_mtim.tv_sec, buf->b_mtime)
|| (int)file_info.stat.st_mode != buf->b_orig_mode)) {
const long prev_b_mtime = buf->b_mtime;
retval = 1;
// set b_mtime to stop further warnings (e.g., when executing
// FileChangedShell autocmd)
if (!file_info_ok) {
// Check the file again later to see if it re-appears.
buf->b_mtime = -1;
buf->b_orig_size = 0;
buf->b_orig_mode = 0;
} else {
buf_store_file_info(buf, &file_info);
}
/* Don't do anything for a directory. Might contain the file
* explorer. */
if (os_isdir(buf->b_fname)) {
} else if ((buf->b_p_ar >= 0 ? buf->b_p_ar : p_ar)
&& !bufIsChanged(buf) && file_info_ok) {
// If 'autoread' is set, the buffer has no changes and the file still
// exists, reload the buffer. Use the buffer-local option value if it
// was set, the global option value otherwise.
reload = true;
} else {
if (!file_info_ok) {
reason = "deleted";
} else if (bufIsChanged(buf)) {
reason = "conflict";
} else if (orig_size != buf->b_orig_size || buf_contents_changed(buf)) {
reason = "changed";
} else if (orig_mode != buf->b_orig_mode) {
reason = "mode";
} else {
reason = "time";
}
// Only give the warning if there are no FileChangedShell
// autocommands.
// Avoid being called recursively by setting "busy".
busy = true;
set_vim_var_string(VV_FCS_REASON, reason, -1);
set_vim_var_string(VV_FCS_CHOICE, "", -1);
allbuf_lock++;
bool n = apply_autocmds(EVENT_FILECHANGEDSHELL,
buf->b_fname, buf->b_fname, false, buf);
allbuf_lock--;
busy = false;
if (n) {
if (!bufref_valid(&bufref)) {
EMSG(_("E246: FileChangedShell autocommand deleted buffer"));
}
s = get_vim_var_str(VV_FCS_CHOICE);
if (STRCMP(s, "reload") == 0 && *reason != 'd') {
reload = true;
} else if (STRCMP(s, "ask") == 0) {
n = false;
} else {
return 2;
}
}
if (!n) {
if (*reason == 'd') {
// Only give the message once.
if (prev_b_mtime != -1) {
mesg = _("E211: File \"%s\" no longer available");
}
} else {
helpmesg = true;
can_reload = true;
// Check if the file contents really changed to avoid
// giving a warning when only the timestamp was set (e.g.,
// checked out of CVS). Always warn when the buffer was
// changed.
if (reason[2] == 'n') {
mesg = _(
"W12: Warning: File \"%s\" has changed and the buffer was changed in Vim as well");
mesg2 = _("See \":help W12\" for more info.");
} else if (reason[1] == 'h') {
mesg = _(
"W11: Warning: File \"%s\" has changed since editing started");
mesg2 = _("See \":help W11\" for more info.");
} else if (*reason == 'm') {
mesg = _(
"W16: Warning: Mode of file \"%s\" has changed since editing started");
mesg2 = _("See \":help W16\" for more info.");
} else
/* Only timestamp changed, store it to avoid a warning
* in check_mtime() later. */
buf->b_mtime_read = buf->b_mtime;
}
}
}
} else if ((buf->b_flags & BF_NEW) && !(buf->b_flags & BF_NEW_W)
&& os_path_exists(buf->b_ffname)) {
retval = 1;
mesg = _("W13: Warning: File \"%s\" has been created after editing started");
buf->b_flags |= BF_NEW_W;
can_reload = true;
}
if (mesg != NULL) {
path = home_replace_save(buf, buf->b_fname);
if (!helpmesg) {
mesg2 = "";
}
const size_t tbuf_len = STRLEN(path) + STRLEN(mesg) + STRLEN(mesg2) + 2;
char *const tbuf = xmalloc(tbuf_len);
snprintf(tbuf, tbuf_len, mesg, path);
// Set warningmsg here, before the unimportant and output-specific
// mesg2 has been appended.
set_vim_var_string(VV_WARNINGMSG, tbuf, -1);
if (can_reload) {
if (*mesg2 != NUL) {
xstrlcat(tbuf, "\n", tbuf_len - 1);
xstrlcat(tbuf, mesg2, tbuf_len - 1);
}
if (do_dialog(VIM_WARNING, (char_u *) _("Warning"), (char_u *) tbuf,
(char_u *) _("&OK\n&Load File"), 1, NULL, true) == 2) {
reload = true;
}
} else if (State > NORMAL_BUSY || (State & CMDLINE) || already_warned) {
if (*mesg2 != NUL) {
xstrlcat(tbuf, "; ", tbuf_len - 1);
xstrlcat(tbuf, mesg2, tbuf_len - 1);
}
EMSG(tbuf);
retval = 2;
} else {
if (!autocmd_busy) {
msg_start();
msg_puts_attr(tbuf, HL_ATTR(HLF_E) + MSG_HIST);
if (*mesg2 != NUL) {
msg_puts_attr(mesg2, HL_ATTR(HLF_W) + MSG_HIST);
}
msg_clr_eos();
(void)msg_end();
if (emsg_silent == 0) {
ui_flush();
/* give the user some time to think about it */
os_delay(1000L, true);
/* don't redraw and erase the message */
redraw_cmdline = FALSE;
}
}
already_warned = TRUE;
}
xfree(path);
xfree(tbuf);
}
if (reload) {
/* Reload the buffer. */
buf_reload(buf, orig_mode);
if (buf->b_p_udf && buf->b_ffname != NULL) {
char_u hash[UNDO_HASH_SIZE];
buf_T *save_curbuf = curbuf;
/* Any existing undo file is unusable, write it now. */
curbuf = buf;
u_compute_hash(hash);
u_write_undo(NULL, FALSE, buf, hash);
curbuf = save_curbuf;
}
}
// Trigger FileChangedShell when the file was changed in any way.
if (bufref_valid(&bufref) && retval != 0) {
(void)apply_autocmds(EVENT_FILECHANGEDSHELLPOST, buf->b_fname, buf->b_fname,
false, buf);
}
return retval;
}
/*
* Reload a buffer that is already loaded.
* Used when the file was changed outside of Vim.
* "orig_mode" is buf->b_orig_mode before the need for reloading was detected.
* buf->b_orig_mode may have been reset already.
*/
void buf_reload(buf_T *buf, int orig_mode)
{
exarg_T ea;
pos_T old_cursor;
linenr_T old_topline;
int old_ro = buf->b_p_ro;
buf_T *savebuf;
bufref_T bufref;
int saved = OK;
aco_save_T aco;
int flags = READ_NEW;
/* set curwin/curbuf for "buf" and save some things */
aucmd_prepbuf(&aco, buf);
// We only want to read the text from the file, not reset the syntax
// highlighting, clear marks, diff status, etc. Force the fileformat and
// encoding to be the same.
prep_exarg(&ea, buf);
old_cursor = curwin->w_cursor;
old_topline = curwin->w_topline;
if (p_ur < 0 || curbuf->b_ml.ml_line_count <= p_ur) {
/* Save all the text, so that the reload can be undone.
* Sync first so that this is a separate undo-able action. */
u_sync(FALSE);
saved = u_savecommon(0, curbuf->b_ml.ml_line_count + 1, 0, TRUE);
flags |= READ_KEEP_UNDO;
}
// To behave like when a new file is edited (matters for
// BufReadPost autocommands) we first need to delete the current
// buffer contents. But if reading the file fails we should keep
// the old contents. Can't use memory only, the file might be
// too big. Use a hidden buffer to move the buffer contents to.
if (BUFEMPTY() || saved == FAIL) {
savebuf = NULL;
} else {
// Allocate a buffer without putting it in the buffer list.
savebuf = buflist_new(NULL, NULL, (linenr_T)1, BLN_DUMMY);
set_bufref(&bufref, savebuf);
if (savebuf != NULL && buf == curbuf) {
/* Open the memline. */
curbuf = savebuf;
curwin->w_buffer = savebuf;
saved = ml_open(curbuf);
curbuf = buf;
curwin->w_buffer = buf;
}
if (savebuf == NULL || saved == FAIL || buf != curbuf
|| move_lines(buf, savebuf) == FAIL) {
EMSG2(_("E462: Could not prepare for reloading \"%s\""),
buf->b_fname);
saved = FAIL;
}
}
if (saved == OK) {
curbuf->b_flags |= BF_CHECK_RO; // check for RO again
keep_filetype = true; // don't detect 'filetype'
if (readfile(buf->b_ffname, buf->b_fname, (linenr_T)0, (linenr_T)0,
(linenr_T)MAXLNUM, &ea, flags) != OK) {
if (!aborting()) {
EMSG2(_("E321: Could not reload \"%s\""), buf->b_fname);
}
if (savebuf != NULL && bufref_valid(&bufref) && buf == curbuf) {
// Put the text back from the save buffer. First
// delete any lines that readfile() added.
while (!BUFEMPTY()) {
if (ml_delete(buf->b_ml.ml_line_count, false) == FAIL) {
break;
}
}
(void)move_lines(savebuf, buf);
}
} else if (buf == curbuf) { // "buf" still valid.
// Mark the buffer as unmodified and free undo info.
unchanged(buf, true, true);
if ((flags & READ_KEEP_UNDO) == 0) {
u_blockfree(buf);
u_clearall(buf);
} else {
// Mark all undo states as changed.
u_unchanged(curbuf);
}
}
}
xfree(ea.cmd);
if (savebuf != NULL && bufref_valid(&bufref)) {
wipe_buffer(savebuf, false);
}
/* Invalidate diff info if necessary. */
diff_invalidate(curbuf);
/* Restore the topline and cursor position and check it (lines may
* have been removed). */
if (old_topline > curbuf->b_ml.ml_line_count)
curwin->w_topline = curbuf->b_ml.ml_line_count;
else
curwin->w_topline = old_topline;
curwin->w_cursor = old_cursor;
check_cursor();
update_topline();
keep_filetype = FALSE;
/* Update folds unless they are defined manually. */
FOR_ALL_TAB_WINDOWS(tp, wp) {
if (wp->w_buffer == curwin->w_buffer
&& !foldmethodIsManual(wp)) {
foldUpdateAll(wp);
}
}
/* If the mode didn't change and 'readonly' was set, keep the old
* value; the user probably used the ":view" command. But don't
* reset it, might have had a read error. */
if (orig_mode == curbuf->b_orig_mode)
curbuf->b_p_ro |= old_ro;
/* Modelines must override settings done by autocommands. */
do_modelines(0);
/* restore curwin/curbuf and a few other things */
aucmd_restbuf(&aco);
/* Careful: autocommands may have made "buf" invalid! */
}
void buf_store_file_info(buf_T *buf, FileInfo *file_info)
FUNC_ATTR_NONNULL_ALL
{
buf->b_mtime = file_info->stat.st_mtim.tv_sec;
buf->b_orig_size = os_fileinfo_size(file_info);
buf->b_orig_mode = (int)file_info->stat.st_mode;
}
/*
* Adjust the line with missing eol, used for the next write.
* Used for do_filter(), when the input lines for the filter are deleted.
*/
void write_lnum_adjust(linenr_T offset)
{
if (curbuf->b_no_eol_lnum != 0) /* only if there is a missing eol */
curbuf->b_no_eol_lnum += offset;
}
#if defined(BACKSLASH_IN_FILENAME)
/// Convert all backslashes in fname to forward slashes in-place,
/// unless when it looks like a URL.
void forward_slash(char_u *fname)
{
char_u *p;
if (path_with_url((const char *)fname)) {
return;
}
for (p = fname; *p != NUL; p++) {
// The Big5 encoding can have '\' in the trail byte.
if (*p == '\\') {
*p = '/';
}
}
}
#endif
/// Name of Vim's own temp dir. Ends in a slash.
static char_u *vim_tempdir = NULL;
/// Create a directory for private use by this instance of Neovim.
/// This is done once, and the same directory is used for all temp files.
/// This method avoids security problems because of symlink attacks et al.
/// It's also a bit faster, because we only need to check for an existing
/// file when creating the directory and not for each temp file.
static void vim_maketempdir(void)
{
static const char *temp_dirs[] = TEMP_DIR_NAMES;
// Try the entries in `TEMP_DIR_NAMES` to create the temp directory.
char_u template[TEMP_FILE_PATH_MAXLEN];
char_u path[TEMP_FILE_PATH_MAXLEN];
// Make sure the umask doesn't remove the executable bit.
// "repl" has been reported to use "0177".
mode_t umask_save = umask(0077);
for (size_t i = 0; i < ARRAY_SIZE(temp_dirs); i++) {
// Expand environment variables, leave room for "/nvimXXXXXX/999999999"
expand_env((char_u *)temp_dirs[i], template, TEMP_FILE_PATH_MAXLEN - 22);
if (!os_isdir(template)) { // directory doesn't exist
continue;
}
add_pathsep((char *)template);
// Concatenate with temporary directory name pattern
STRCAT(template, "nvimXXXXXX");
if (os_mkdtemp((const char *)template, (char *)path) != 0) {
continue;
}
if (vim_settempdir((char *)path)) {
// Successfully created and set temporary directory so stop trying.
break;
} else {
// Couldn't set `vim_tempdir` to `path` so remove created directory.
os_rmdir((char *)path);
}
}
(void)umask(umask_save);
}
/// Delete "name" and everything in it, recursively.
/// @param name The path which should be deleted.
/// @return 0 for success, -1 if some file was not deleted.
int delete_recursive(const char *name)
{
int result = 0;
if (os_isrealdir(name)) {
snprintf((char *)NameBuff, MAXPATHL, "%s/*", name); // NOLINT
char_u **files;
int file_count;
char_u *exp = vim_strsave(NameBuff);
if (gen_expand_wildcards(1, &exp, &file_count, &files,
EW_DIR | EW_FILE | EW_SILENT | EW_ALLLINKS
| EW_DODOT | EW_EMPTYOK) == OK) {
for (int i = 0; i < file_count; i++) {
if (delete_recursive((const char *)files[i]) != 0) {
result = -1;
}
}
FreeWild(file_count, files);
} else {
result = -1;
}
xfree(exp);
os_rmdir(name);
} else {
result = os_remove(name) == 0 ? 0 : -1;
}
return result;
}
/// Delete the temp directory and all files it contains.
void vim_deltempdir(void)
{
if (vim_tempdir != NULL) {
// remove the trailing path separator
path_tail(vim_tempdir)[-1] = NUL;
delete_recursive((const char *)vim_tempdir);
XFREE_CLEAR(vim_tempdir);
}
}
/// Get the name of temp directory. This directory would be created on the first
/// call to this function.
char_u *vim_gettempdir(void)
{
if (vim_tempdir == NULL) {
vim_maketempdir();
}
return vim_tempdir;
}
/// Set Neovim own temporary directory name to `tempdir`. This directory should
/// be already created. Expand this name to a full path and put it in
/// `vim_tempdir`. This avoids that using `:cd` would confuse us.
///
/// @param tempdir must be no longer than MAXPATHL.
///
/// @return false if we run out of memory.
static bool vim_settempdir(char *tempdir)
{
char *buf = verbose_try_malloc(MAXPATHL + 2);
if (!buf) {
return false;
}
vim_FullName(tempdir, buf, MAXPATHL, false);
add_pathsep(buf);
vim_tempdir = (char_u *)xstrdup(buf);
xfree(buf);
return true;
}
/// Return a unique name that can be used for a temp file.
///
/// @note The temp file is NOT created.
///
/// @return pointer to the temp file name or NULL if Neovim can't create
/// temporary directory for its own temporary files.
char_u *vim_tempname(void)
{
// Temp filename counter.
static uint64_t temp_count;
char_u *tempdir = vim_gettempdir();
if (!tempdir) {
return NULL;
}
// There is no need to check if the file exists, because we own the directory
// and nobody else creates a file in it.
char_u template[TEMP_FILE_PATH_MAXLEN];
snprintf((char *)template, TEMP_FILE_PATH_MAXLEN,
"%s%" PRIu64, tempdir, temp_count++);
return vim_strsave(template);
}
/*
* Code for automatic commands.
*/
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "auevents_name_map.generated.h"
#endif
static AutoPatCmd *active_apc_list = NULL; /* stack of active autocommands */
/// List of autocmd group names
static garray_T augroups = { 0, 0, sizeof(char_u *), 10, NULL };
#define AUGROUP_NAME(i) (((char **)augroups.ga_data)[i])
/*
* The ID of the current group. Group 0 is the default one.
*/
static int current_augroup = AUGROUP_DEFAULT;
static int au_need_clean = FALSE; /* need to delete marked patterns */
static event_T last_event;
static int last_group;
static int autocmd_blocked = 0; /* block all autocmds */
// use get_deleted_augroup() to get this
static const char *deleted_augroup = NULL;
static inline const char *get_deleted_augroup(void)
FUNC_ATTR_ALWAYS_INLINE
{
if (deleted_augroup == NULL) {
deleted_augroup = _("--Deleted--");
}
return deleted_augroup;
}
/*
* Show the autocommands for one AutoPat.
*/
static void show_autocmd(AutoPat *ap, event_T event)
{
AutoCmd *ac;
/* Check for "got_int" (here and at various places below), which is set
* when "q" has been hit for the "--more--" prompt */
if (got_int)
return;
if (ap->pat == NULL) /* pattern has been removed */
return;
msg_putchar('\n');
if (got_int)
return;
if (event != last_event || ap->group != last_group) {
if (ap->group != AUGROUP_DEFAULT) {
if (AUGROUP_NAME(ap->group) == NULL) {
msg_puts_attr(get_deleted_augroup(), HL_ATTR(HLF_E));
} else {
msg_puts_attr(AUGROUP_NAME(ap->group), HL_ATTR(HLF_T));
}
msg_puts(" ");
}
msg_puts_attr(event_nr2name(event), HL_ATTR(HLF_T));
last_event = event;
last_group = ap->group;
msg_putchar('\n');
if (got_int)
return;
}
msg_col = 4;
msg_outtrans(ap->pat);
for (ac = ap->cmds; ac != NULL; ac = ac->next) {
if (ac->cmd == NULL) { /* skip removed commands */
continue;
}
if (msg_col >= 14) {
msg_putchar('\n');
}
msg_col = 14;
if (got_int) {
return;
}
msg_outtrans(ac->cmd);
if (p_verbose > 0) {
last_set_msg(ac->script_ctx);
}
if (got_int) {
return;
}
if (ac->next != NULL) {
msg_putchar('\n');
if (got_int) {
return;
}
}
}
}
// Mark an autocommand handler for deletion.
static void au_remove_pat(AutoPat *ap)
{
XFREE_CLEAR(ap->pat);
ap->buflocal_nr = -1;
au_need_clean = true;
}
// Mark all commands for a pattern for deletion.
static void au_remove_cmds(AutoPat *ap)
{
for (AutoCmd *ac = ap->cmds; ac != NULL; ac = ac->next) {
XFREE_CLEAR(ac->cmd);
}
au_need_clean = true;
}
// Delete one command from an autocmd pattern.
static void au_del_cmd(AutoCmd *ac)
{
XFREE_CLEAR(ac->cmd);
au_need_clean = true;
}
/// Cleanup autocommands and patterns that have been deleted.
/// This is only done when not executing autocommands.
static void au_cleanup(void)
{
AutoPat *ap, **prev_ap;
AutoCmd *ac, **prev_ac;
event_T event;
if (autocmd_busy || !au_need_clean) {
return;
}
// Loop over all events.
for (event = (event_T)0; (int)event < (int)NUM_EVENTS;
event = (event_T)((int)event + 1)) {
// Loop over all autocommand patterns.
prev_ap = &(first_autopat[(int)event]);
for (ap = *prev_ap; ap != NULL; ap = *prev_ap) {
// Loop over all commands for this pattern.
prev_ac = &(ap->cmds);
bool has_cmd = false;
for (ac = *prev_ac; ac != NULL; ac = *prev_ac) {
// Remove the command if the pattern is to be deleted or when
// the command has been marked for deletion.
if (ap->pat == NULL || ac->cmd == NULL) {
*prev_ac = ac->next;
xfree(ac->cmd);
xfree(ac);
} else {
has_cmd = true;
prev_ac = &(ac->next);
}
}
if (ap->pat != NULL && !has_cmd) {
// Pattern was not marked for deletion, but all of its commands were.
// So mark the pattern for deletion.
au_remove_pat(ap);
}
// Remove the pattern if it has been marked for deletion.
if (ap->pat == NULL) {
if (ap->next == NULL) {
if (prev_ap == &(first_autopat[(int)event])) {
last_autopat[(int)event] = NULL;
} else {
// this depends on the "next" field being the first in
// the struct
last_autopat[(int)event] = (AutoPat *)prev_ap;
}
}
*prev_ap = ap->next;
vim_regfree(ap->reg_prog);
xfree(ap);
} else {
prev_ap = &(ap->next);
}
}
}
au_need_clean = false;
}
/*
* Called when buffer is freed, to remove/invalidate related buffer-local
* autocmds.
*/
void aubuflocal_remove(buf_T *buf)
{
AutoPat *ap;
event_T event;
AutoPatCmd *apc;
/* invalidate currently executing autocommands */
for (apc = active_apc_list; apc; apc = apc->next)
if (buf->b_fnum == apc->arg_bufnr)
apc->arg_bufnr = 0;
/* invalidate buflocals looping through events */
for (event = (event_T)0; (int)event < (int)NUM_EVENTS;
event = (event_T)((int)event + 1))
/* loop over all autocommand patterns */
for (ap = first_autopat[(int)event]; ap != NULL; ap = ap->next)
if (ap->buflocal_nr == buf->b_fnum) {
au_remove_pat(ap);
if (p_verbose >= 6) {
verbose_enter();
smsg(_("auto-removing autocommand: %s <buffer=%d>"),
event_nr2name(event), buf->b_fnum);
verbose_leave();
}
}
au_cleanup();
}
// Add an autocmd group name.
// Return its ID. Returns AUGROUP_ERROR (< 0) for error.
static int au_new_group(char_u *name)
{
int i = au_find_group(name);
if (i == AUGROUP_ERROR) { // the group doesn't exist yet, add it.
// First try using a free entry.
for (i = 0; i < augroups.ga_len; i++) {
if (AUGROUP_NAME(i) == NULL) {
break;
}
}
if (i == augroups.ga_len) {
ga_grow(&augroups, 1);
}
AUGROUP_NAME(i) = xstrdup((char *)name);
if (i == augroups.ga_len) {
augroups.ga_len++;
}
}
return i;
}
static void au_del_group(char_u *name)
{
int i = au_find_group(name);
if (i == AUGROUP_ERROR) { // the group doesn't exist
EMSG2(_("E367: No such group: \"%s\""), name);
} else if (i == current_augroup) {
EMSG(_("E936: Cannot delete the current group"));
} else {
event_T event;
AutoPat *ap;
int in_use = false;
for (event = (event_T)0; (int)event < (int)NUM_EVENTS;
event = (event_T)((int)event + 1)) {
for (ap = first_autopat[(int)event]; ap != NULL; ap = ap->next) {
if (ap->group == i && ap->pat != NULL) {
give_warning((char_u *)
_("W19: Deleting augroup that is still in use"), true);
in_use = true;
event = NUM_EVENTS;
break;
}
}
}
xfree(AUGROUP_NAME(i));
if (in_use) {
AUGROUP_NAME(i) = (char *)get_deleted_augroup();
} else {
AUGROUP_NAME(i) = NULL;
}
}
}
/// Find the ID of an autocmd group name.
///
/// @param name augroup name
///
/// @return the ID or AUGROUP_ERROR (< 0) for error.
static int au_find_group(const char_u *name)
FUNC_ATTR_PURE FUNC_ATTR_WARN_UNUSED_RESULT
{
for (int i = 0; i < augroups.ga_len; i++) {
if (AUGROUP_NAME(i) != NULL && AUGROUP_NAME(i) != get_deleted_augroup()
&& STRCMP(AUGROUP_NAME(i), name) == 0) {
return i;
}
}
return AUGROUP_ERROR;
}
/// Return true if augroup "name" exists.
///
/// @param name augroup name
bool au_has_group(const char_u *name)
FUNC_ATTR_PURE FUNC_ATTR_WARN_UNUSED_RESULT
{
return au_find_group(name) != AUGROUP_ERROR;
}
/// ":augroup {name}".
void do_augroup(char_u *arg, int del_group)
{
if (del_group) {
if (*arg == NUL) {
EMSG(_(e_argreq));
} else {
au_del_group(arg);
}
} else if (STRICMP(arg, "end") == 0) { // ":aug end": back to group 0
current_augroup = AUGROUP_DEFAULT;
} else if (*arg) { // ":aug xxx": switch to group xxx
int i = au_new_group(arg);
if (i != AUGROUP_ERROR)
current_augroup = i;
} else { // ":aug": list the group names
msg_start();
for (int i = 0; i < augroups.ga_len; ++i) {
if (AUGROUP_NAME(i) != NULL) {
msg_puts(AUGROUP_NAME(i));
msg_puts(" ");
}
}
msg_clr_eos();
msg_end();
}
}
#if defined(EXITFREE)
void free_all_autocmds(void)
{
for (current_augroup = -1; current_augroup < augroups.ga_len;
current_augroup++) {
do_autocmd((char_u *)"", true);
}
for (int i = 0; i < augroups.ga_len; i++) {
char *const s = ((char **)(augroups.ga_data))[i];
if ((const char *)s != get_deleted_augroup()) {
xfree(s);
}
}
ga_clear(&augroups);
}
#endif
/*
* Return the event number for event name "start".
* Return NUM_EVENTS if the event name was not found.
* Return a pointer to the next event name in "end".
*/
static event_T event_name2nr(const char_u *start, char_u **end)
{
const char_u *p;
int i;
int len;
// the event name ends with end of line, '|', a blank or a comma
for (p = start; *p && !ascii_iswhite(*p) && *p != ',' && *p != '|'; p++) {
}
for (i = 0; event_names[i].name != NULL; i++) {
len = (int)event_names[i].len;
if (len == p - start && STRNICMP(event_names[i].name, start, len) == 0) {
break;
}
}
if (*p == ',') {
p++;
}
*end = (char_u *)p;
if (event_names[i].name == NULL) {
return NUM_EVENTS;
}
return event_names[i].event;
}
/// Return the name for event
///
/// @param[in] event Event to return name for.
///
/// @return Event name, static string. Returns "Unknown" for unknown events.
static const char *event_nr2name(event_T event)
FUNC_ATTR_NONNULL_RET FUNC_ATTR_WARN_UNUSED_RESULT FUNC_ATTR_CONST
{
int i;
for (i = 0; event_names[i].name != NULL; i++) {
if (event_names[i].event == event) {
return event_names[i].name;
}
}
return "Unknown";
}
/*
* Scan over the events. "*" stands for all events.
*/
static char_u *
find_end_event (
char_u *arg,
int have_group /* TRUE when group name was found */
)
{
char_u *pat;
char_u *p;
if (*arg == '*') {
if (arg[1] && !ascii_iswhite(arg[1])) {
EMSG2(_("E215: Illegal character after *: %s"), arg);
return NULL;
}
pat = arg + 1;
} else {
for (pat = arg; *pat && *pat != '|' && !ascii_iswhite(*pat); pat = p) {
if ((int)event_name2nr(pat, &p) >= (int)NUM_EVENTS) {
if (have_group)
EMSG2(_("E216: No such event: %s"), pat);
else
EMSG2(_("E216: No such group or event: %s"), pat);
return NULL;
}
}
}
return pat;
}
/// Return true if "event" is included in 'eventignore'.
///
/// @param event event to check
static bool event_ignored(event_T event)
FUNC_ATTR_PURE FUNC_ATTR_WARN_UNUSED_RESULT
{
char_u *p = p_ei;
while (*p != NUL) {
if (STRNICMP(p, "all", 3) == 0 && (p[3] == NUL || p[3] == ',')) {
return true;
}
if (event_name2nr(p, &p) == event) {
return true;
}
}
return false;
}
/*
* Return OK when the contents of p_ei is valid, FAIL otherwise.
*/
int check_ei(void)
{
char_u *p = p_ei;
while (*p) {
if (STRNICMP(p, "all", 3) == 0 && (p[3] == NUL || p[3] == ',')) {
p += 3;
if (*p == ',')
++p;
} else if (event_name2nr(p, &p) == NUM_EVENTS)
return FAIL;
}
return OK;
}
/*
* Add "what" to 'eventignore' to skip loading syntax highlighting for every
* buffer loaded into the window. "what" must start with a comma.
* Returns the old value of 'eventignore' in allocated memory.
*/
char_u *au_event_disable(char *what)
{
char_u *new_ei;
char_u *save_ei;
save_ei = vim_strsave(p_ei);
new_ei = vim_strnsave(p_ei, (int)(STRLEN(p_ei) + STRLEN(what)));
if (*what == ',' && *p_ei == NUL)
STRCPY(new_ei, what + 1);
else
STRCAT(new_ei, what);
set_string_option_direct((char_u *)"ei", -1, new_ei, OPT_FREE, SID_NONE);
xfree(new_ei);
return save_ei;
}
void au_event_restore(char_u *old_ei)
{
if (old_ei != NULL) {
set_string_option_direct((char_u *)"ei", -1, old_ei,
OPT_FREE, SID_NONE);
xfree(old_ei);
}
}
// Implements :autocmd.
// Defines an autocmd (does not execute; cf. apply_autocmds_group).
//
// Can be used in the following ways:
//
// :autocmd <event> <pat> <cmd> Add <cmd> to the list of commands that
// will be automatically executed for <event>
// when editing a file matching <pat>, in
// the current group.
// :autocmd <event> <pat> Show the autocommands associated with
// <event> and <pat>.
// :autocmd <event> Show the autocommands associated with
// <event>.
// :autocmd Show all autocommands.
// :autocmd! <event> <pat> <cmd> Remove all autocommands associated with
// <event> and <pat>, and add the command
// <cmd>, for the current group.
// :autocmd! <event> <pat> Remove all autocommands associated with
// <event> and <pat> for the current group.
// :autocmd! <event> Remove all autocommands associated with
// <event> for the current group.
// :autocmd! Remove ALL autocommands for the current
// group.
//
// Multiple events and patterns may be given separated by commas. Here are
// some examples:
// :autocmd bufread,bufenter *.c,*.h set tw=0 smartindent noic
// :autocmd bufleave * set tw=79 nosmartindent ic infercase
//
// :autocmd * *.c show all autocommands for *.c files.
//
// Mostly a {group} argument can optionally appear before <event>.
void do_autocmd(char_u *arg_in, int forceit)
{
char_u *arg = arg_in;
char_u *pat;
char_u *envpat = NULL;
char_u *cmd;
int need_free = false;
int nested = false;
bool once = false;
int group;
if (*arg == '|') {
arg = (char_u *)"";
group = AUGROUP_ALL; // no argument, use all groups
} else {
// Check for a legal group name. If not, use AUGROUP_ALL.
group = au_get_grouparg(&arg);
}
/*
* Scan over the events.
* If we find an illegal name, return here, don't do anything.
*/
pat = find_end_event(arg, group != AUGROUP_ALL);
if (pat == NULL)
return;
pat = skipwhite(pat);
if (*pat == '|') {
pat = (char_u *)"";
cmd = (char_u *)"";
} else {
// Scan over the pattern. Put a NUL at the end.
cmd = pat;
while (*cmd && (!ascii_iswhite(*cmd) || cmd[-1] == '\\')) {
cmd++;
}
if (*cmd) {
*cmd++ = NUL;
}
// Expand environment variables in the pattern. Set 'shellslash', we want
// forward slashes here.
if (vim_strchr(pat, '$') != NULL || vim_strchr(pat, '~') != NULL) {
#ifdef BACKSLASH_IN_FILENAME
int p_ssl_save = p_ssl;
p_ssl = true;
#endif
envpat = expand_env_save(pat);
#ifdef BACKSLASH_IN_FILENAME
p_ssl = p_ssl_save;
#endif
if (envpat != NULL) {
pat = envpat;
}
}
cmd = skipwhite(cmd);
for (size_t i = 0; i < 2; i++) {
if (*cmd != NUL) {
// Check for "++once" flag.
if (STRNCMP(cmd, "++once", 6) == 0 && ascii_iswhite(cmd[6])) {
if (once) {
EMSG2(_(e_duparg2), "++once");
}
once = true;
cmd = skipwhite(cmd + 6);
}
// Check for "++nested" flag.
if ((STRNCMP(cmd, "++nested", 8) == 0 && ascii_iswhite(cmd[8]))) {
if (nested) {
EMSG2(_(e_duparg2), "++nested");
}
nested = true;
cmd = skipwhite(cmd + 8);
}
// Check for the old (deprecated) "nested" flag.
if (STRNCMP(cmd, "nested", 6) == 0 && ascii_iswhite(cmd[6])) {
if (nested) {
EMSG2(_(e_duparg2), "nested");
}
nested = true;
cmd = skipwhite(cmd + 6);
}
}
}
// Find the start of the commands.
// Expand <sfile> in it.
if (*cmd != NUL) {
cmd = expand_sfile(cmd);
if (cmd == NULL) { // some error
return;
}
need_free = true;
}
}
/*
* Print header when showing autocommands.
*/
if (!forceit && *cmd == NUL) {
// Highlight title
MSG_PUTS_TITLE(_("\n--- Autocommands ---"));
}
/*
* Loop over the events.
*/
last_event = (event_T)-1; // for listing the event name
last_group = AUGROUP_ERROR; // for listing the group name
if (*arg == '*' || *arg == NUL || *arg == '|') {
for (event_T event = (event_T)0; (int)event < (int)NUM_EVENTS;
event = (event_T)((int)event + 1)) {
if (do_autocmd_event(event, pat, once, nested, cmd, forceit, group)
== FAIL) {
break;
}
}
} else {
while (*arg && *arg != '|' && !ascii_iswhite(*arg)) {
event_T event = event_name2nr(arg, &arg);
assert(event < NUM_EVENTS);
if (do_autocmd_event(event, pat, once, nested, cmd, forceit, group)
== FAIL) {
break;
}
}
}
if (need_free)
xfree(cmd);
xfree(envpat);
}
/*
* Find the group ID in a ":autocmd" or ":doautocmd" argument.
* The "argp" argument is advanced to the following argument.
*
* Returns the group ID or AUGROUP_ALL.
*/
static int au_get_grouparg(char_u **argp)
{
char_u *group_name;
char_u *p;
char_u *arg = *argp;
int group = AUGROUP_ALL;
for (p = arg; *p && !ascii_iswhite(*p) && *p != '|'; p++) {
}
if (p > arg) {
group_name = vim_strnsave(arg, (int)(p - arg));
group = au_find_group(group_name);
if (group == AUGROUP_ERROR)
group = AUGROUP_ALL; /* no match, use all groups */
else
*argp = skipwhite(p); /* match, skip over group name */
xfree(group_name);
}
return group;
}
// do_autocmd() for one event.
// Defines an autocmd (does not execute; cf. apply_autocmds_group).
//
// If *pat == NUL: do for all patterns.
// If *cmd == NUL: show entries.
// If forceit == TRUE: delete entries.
// If group is not AUGROUP_ALL: only use this group.
static int do_autocmd_event(event_T event, char_u *pat, bool once, int nested,
char_u *cmd, int forceit, int group)
{
AutoPat *ap;
AutoPat **prev_ap;
AutoCmd *ac;
AutoCmd **prev_ac;
int brace_level;
char_u *endpat;
int findgroup;
int allgroups;
int patlen;
int is_buflocal;
int buflocal_nr;
char_u buflocal_pat[25]; /* for "<buffer=X>" */
if (group == AUGROUP_ALL)
findgroup = current_augroup;
else
findgroup = group;
allgroups = (group == AUGROUP_ALL && !forceit && *cmd == NUL);
/*
* Show or delete all patterns for an event.
*/
if (*pat == NUL) {
for (ap = first_autopat[(int)event]; ap != NULL; ap = ap->next) {
if (forceit) { /* delete the AutoPat, if it's in the current group */
if (ap->group == findgroup)
au_remove_pat(ap);
} else if (group == AUGROUP_ALL || ap->group == group)
show_autocmd(ap, event);
}
}
/*
* Loop through all the specified patterns.
*/
for (; *pat; pat = (*endpat == ',' ? endpat + 1 : endpat)) {
/*
* Find end of the pattern.
* Watch out for a comma in braces, like "*.\{obj,o\}".
*/
endpat = pat;
// ignore single comma
if (*endpat == ',') {
continue;
}
brace_level = 0;
for (; *endpat && (*endpat != ',' || brace_level || endpat[-1] == '\\');
++endpat) {
if (*endpat == '{')
brace_level++;
else if (*endpat == '}')
brace_level--;
}
patlen = (int)(endpat - pat);
/*
* detect special <buflocal[=X]> buffer-local patterns
*/
is_buflocal = FALSE;
buflocal_nr = 0;
if (patlen >= 8 && STRNCMP(pat, "<buffer", 7) == 0
&& pat[patlen - 1] == '>') {
/* "<buffer...>": Error will be printed only for addition.
* printing and removing will proceed silently. */
is_buflocal = TRUE;
if (patlen == 8)
/* "<buffer>" */
buflocal_nr = curbuf->b_fnum;
else if (patlen > 9 && pat[7] == '=') {
if (patlen == 13 && STRNICMP(pat, "<buffer=abuf>", 13) == 0)
/* "<buffer=abuf>" */
buflocal_nr = autocmd_bufnr;
else if (skipdigits(pat + 8) == pat + patlen - 1)
/* "<buffer=123>" */
buflocal_nr = atoi((char *)pat + 8);
}
}
if (is_buflocal) {
/* normalize pat into standard "<buffer>#N" form */
sprintf((char *)buflocal_pat, "<buffer=%d>", buflocal_nr);
pat = buflocal_pat; /* can modify pat and patlen */
patlen = (int)STRLEN(buflocal_pat); /* but not endpat */
}
// Find AutoPat entries with this pattern. When adding a command it
// always goes at or after the last one, so start at the end.
if (!forceit && *cmd != NUL && last_autopat[(int)event] != NULL) {
prev_ap = &last_autopat[(int)event];
} else {
prev_ap = &first_autopat[(int)event];
}
while ((ap = *prev_ap) != NULL) {
if (ap->pat != NULL) {
/* Accept a pattern when:
* - a group was specified and it's that group, or a group was
* not specified and it's the current group, or a group was
* not specified and we are listing
* - the length of the pattern matches
* - the pattern matches.
* For <buffer[=X]>, this condition works because we normalize
* all buffer-local patterns.
*/
if ((allgroups || ap->group == findgroup)
&& ap->patlen == patlen
&& STRNCMP(pat, ap->pat, patlen) == 0) {
/*
* Remove existing autocommands.
* If adding any new autocmd's for this AutoPat, don't
* delete the pattern from the autopat list, append to
* this list.
*/
if (forceit) {
if (*cmd != NUL && ap->next == NULL) {
au_remove_cmds(ap);
break;
}
au_remove_pat(ap);
}
/*
* Show autocmd's for this autopat, or buflocals <buffer=X>
*/
else if (*cmd == NUL)
show_autocmd(ap, event);
/*
* Add autocmd to this autopat, if it's the last one.
*/
else if (ap->next == NULL)
break;
}
}
prev_ap = &ap->next;
}
/*
* Add a new command.
*/
if (*cmd != NUL) {
/*
* If the pattern we want to add a command to does appear at the
* end of the list (or not is not in the list at all), add the
* pattern at the end of the list.
*/
if (ap == NULL) {
/* refuse to add buffer-local ap if buffer number is invalid */
if (is_buflocal && (buflocal_nr == 0
|| buflist_findnr(buflocal_nr) == NULL)) {
emsgf(_("E680: <buffer=%d>: invalid buffer number "),
buflocal_nr);
return FAIL;
}
ap = xmalloc(sizeof(AutoPat));
ap->pat = vim_strnsave(pat, patlen);
ap->patlen = patlen;
if (is_buflocal) {
ap->buflocal_nr = buflocal_nr;
ap->reg_prog = NULL;
} else {
char_u *reg_pat;
ap->buflocal_nr = 0;
reg_pat = file_pat_to_reg_pat(pat, endpat,
&ap->allow_dirs, TRUE);
if (reg_pat != NULL)
ap->reg_prog = vim_regcomp(reg_pat, RE_MAGIC);
xfree(reg_pat);
if (reg_pat == NULL || ap->reg_prog == NULL) {
xfree(ap->pat);
xfree(ap);
return FAIL;
}
}
ap->cmds = NULL;
*prev_ap = ap;
last_autopat[(int)event] = ap;
ap->next = NULL;
if (group == AUGROUP_ALL)
ap->group = current_augroup;
else
ap->group = group;
}
/*
* Add the autocmd at the end of the AutoCmd list.
*/
prev_ac = &(ap->cmds);
while ((ac = *prev_ac) != NULL)
prev_ac = &ac->next;
ac = xmalloc(sizeof(AutoCmd));
ac->cmd = vim_strsave(cmd);
ac->script_ctx = current_sctx;
ac->script_ctx.sc_lnum += sourcing_lnum;
ac->next = NULL;
*prev_ac = ac;
ac->once = once;
ac->nested = nested;
}
}
au_cleanup(); /* may really delete removed patterns/commands now */
return OK;
}
// Implementation of ":doautocmd [group] event [fname]".
// Return OK for success, FAIL for failure;
int
do_doautocmd(
char_u *arg,
int do_msg, // give message for no matching autocmds?
bool *did_something
)
{
char_u *fname;
int nothing_done = TRUE;
int group;
if (did_something != NULL) {
*did_something = false;
}
/*
* Check for a legal group name. If not, use AUGROUP_ALL.
*/
group = au_get_grouparg(&arg);
if (*arg == '*') {
EMSG(_("E217: Can't execute autocommands for ALL events"));
return FAIL;
}
/*
* Scan over the events.
* If we find an illegal name, return here, don't do anything.
*/
fname = find_end_event(arg, group != AUGROUP_ALL);
if (fname == NULL)
return FAIL;
fname = skipwhite(fname);
// Loop over the events.
while (*arg && !ends_excmd(*arg) && !ascii_iswhite(*arg)) {
if (apply_autocmds_group(event_name2nr(arg, &arg), fname, NULL, true,
group, curbuf, NULL)) {
nothing_done = false;
}
}
if (nothing_done && do_msg) {
MSG(_("No matching autocommands"));
}
if (did_something != NULL) {
*did_something = !nothing_done;
}
return aborting() ? FAIL : OK;
}
/*
* ":doautoall": execute autocommands for each loaded buffer.
*/
void ex_doautoall(exarg_T *eap)
{
int retval;
aco_save_T aco;
char_u *arg = eap->arg;
int call_do_modelines = check_nomodeline(&arg);
bufref_T bufref;
/*
* This is a bit tricky: For some commands curwin->w_buffer needs to be
* equal to curbuf, but for some buffers there may not be a window.
* So we change the buffer for the current window for a moment. This
* gives problems when the autocommands make changes to the list of
* buffers or windows...
*/
FOR_ALL_BUFFERS(buf) {
if (buf->b_ml.ml_mfp == NULL) {
continue;
}
// Find a window for this buffer and save some values.
aucmd_prepbuf(&aco, buf);
set_bufref(&bufref, buf);
bool did_aucmd;
// execute the autocommands for this buffer
retval = do_doautocmd(arg, false, &did_aucmd);
if (call_do_modelines && did_aucmd) {
// Execute the modeline settings, but don't set window-local
// options if we are using the current window for another
// buffer.
do_modelines(curwin == aucmd_win ? OPT_NOWIN : 0);
}
/* restore the current window */
aucmd_restbuf(&aco);
// Stop if there is some error or buffer was deleted.
if (retval == FAIL || !bufref_valid(&bufref)) {
break;
}
}
check_cursor(); /* just in case lines got deleted */
}
/// Check *argp for <nomodeline>. When it is present return false, otherwise
/// return true and advance *argp to after it. Thus do_modelines() should be
/// called when true is returned.
///
/// @param[in,out] argp argument string
bool check_nomodeline(char_u **argp)
FUNC_ATTR_NONNULL_ALL FUNC_ATTR_WARN_UNUSED_RESULT
{
if (STRNCMP(*argp, "<nomodeline>", 12) == 0) {
*argp = skipwhite(*argp + 12);
return false;
}
return true;
}
/// Prepare for executing autocommands for (hidden) buffer `buf`.
/// If the current buffer is not in any visible window, put it in a temporary
/// floating window `aucmd_win`.
/// Set `curbuf` and `curwin` to match `buf`.
///
/// @param aco structure to save values in
/// @param buf new curbuf
void aucmd_prepbuf(aco_save_T *aco, buf_T *buf)
{
win_T *win;
bool need_append = true; // Append `aucmd_win` to the window list.
/* Find a window that is for the new buffer */
if (buf == curbuf) { /* be quick when buf is curbuf */
win = curwin;
} else {
win = NULL;
FOR_ALL_WINDOWS_IN_TAB(wp, curtab) {
if (wp->w_buffer == buf) {
win = wp;
break;
}
}
}
// Allocate the `aucmd_win` dummy floating window.
if (win == NULL && aucmd_win == NULL) {
win_alloc_aucmd_win();
need_append = false;
}
if (win == NULL && aucmd_win_used)
/* Strange recursive autocommand, fall back to using the current
* window. Expect a few side effects... */
win = curwin;
aco->save_curwin = curwin;
aco->save_prevwin = prevwin;
aco->save_curbuf = curbuf;
if (win != NULL) {
/* There is a window for "buf" in the current tab page, make it the
* curwin. This is preferred, it has the least side effects (esp. if
* "buf" is curbuf). */
aco->use_aucmd_win = FALSE;
curwin = win;
} else {
/* There is no window for "buf", use "aucmd_win". To minimize the side
* effects, insert it in the current tab page.
* Anything related to a window (e.g., setting folds) may have
* unexpected results. */
aco->use_aucmd_win = TRUE;
aucmd_win_used = TRUE;
aucmd_win->w_buffer = buf;
aucmd_win->w_s = &buf->b_s;
++buf->b_nwindows;
win_init_empty(aucmd_win); /* set cursor and topline to safe values */
/* Make sure w_localdir and globaldir are NULL to avoid a chdir() in
* win_enter_ext(). */
XFREE_CLEAR(aucmd_win->w_localdir);
aco->globaldir = globaldir;
globaldir = NULL;
block_autocmds(); // We don't want BufEnter/WinEnter autocommands.
if (need_append) {
win_append(lastwin, aucmd_win);
handle_register_window(aucmd_win);
win_config_float(aucmd_win, aucmd_win->w_float_config);
}
// Prevent chdir() call in win_enter_ext(), through do_autochdir()
int save_acd = p_acd;
p_acd = false;
win_enter(aucmd_win, false);
p_acd = save_acd;
unblock_autocmds();
curwin = aucmd_win;
}
curbuf = buf;
aco->new_curwin = curwin;
set_bufref(&aco->new_curbuf, curbuf);
}
/// Cleanup after executing autocommands for a (hidden) buffer.
/// Restore the window as it was (if possible).
///
/// @param aco structure holding saved values
void aucmd_restbuf(aco_save_T *aco)
{
if (aco->use_aucmd_win) {
curbuf->b_nwindows--;
// Find "aucmd_win", it can't be closed, but it may be in another tab page.
// Do not trigger autocommands here.
block_autocmds();
if (curwin != aucmd_win) {
FOR_ALL_TAB_WINDOWS(tp, wp) {
if (wp == aucmd_win) {
if (tp != curtab) {
goto_tabpage_tp(tp, true, true);
}
win_goto(aucmd_win);
goto win_found;
}
}
}
win_found:
win_remove(curwin, NULL);
handle_unregister_window(curwin);
if (curwin->w_grid.chars != NULL) {
ui_comp_remove_grid(&curwin->w_grid);
ui_call_win_hide(curwin->w_grid.handle);
grid_free(&curwin->w_grid);
}
aucmd_win_used = false;
last_status(false); // may need to remove last status line
if (!valid_tabpage_win(curtab)) {
// no valid window in current tabpage
close_tabpage(curtab);
}
unblock_autocmds();
if (win_valid(aco->save_curwin)) {
curwin = aco->save_curwin;
} else {
// Hmm, original window disappeared. Just use the first one.
curwin = firstwin;
}
prevwin = win_valid(aco->save_prevwin) ? aco->save_prevwin
: firstwin; // window disappeared?
vars_clear(&aucmd_win->w_vars->dv_hashtab); // free all w: variables
hash_init(&aucmd_win->w_vars->dv_hashtab); // re-use the hashtab
curbuf = curwin->w_buffer;
xfree(globaldir);
globaldir = aco->globaldir;
// the buffer contents may have changed
check_cursor();
if (curwin->w_topline > curbuf->b_ml.ml_line_count) {
curwin->w_topline = curbuf->b_ml.ml_line_count;
curwin->w_topfill = 0;
}
} else {
// restore curwin
if (win_valid(aco->save_curwin)) {
// Restore the buffer which was previously edited by curwin, if it was
// changed, we are still the same window and the buffer is valid.
if (curwin == aco->new_curwin
&& curbuf != aco->new_curbuf.br_buf
&& bufref_valid(&aco->new_curbuf)
&& aco->new_curbuf.br_buf->b_ml.ml_mfp != NULL) {
if (curwin->w_s == &curbuf->b_s) {
curwin->w_s = &aco->new_curbuf.br_buf->b_s;
}
curbuf->b_nwindows--;
curbuf = aco->new_curbuf.br_buf;
curwin->w_buffer = curbuf;
curbuf->b_nwindows++;
}
curwin = aco->save_curwin;
prevwin = win_valid(aco->save_prevwin) ? aco->save_prevwin
: firstwin; // window disappeared?
curbuf = curwin->w_buffer;
// In case the autocommand moves the cursor to a position that does not
// exist in curbuf
check_cursor();
}
}
}
static int autocmd_nested = FALSE;
/// Execute autocommands for "event" and file name "fname".
///
/// @param event event that occurred
/// @param fname filename, NULL or empty means use actual file name
/// @param fname_io filename to use for <afile> on cmdline
/// @param force When true, ignore autocmd_busy
/// @param buf Buffer for <abuf>
///
/// @return true if some commands were executed.
bool apply_autocmds(event_T event, char_u *fname, char_u *fname_io, bool force,
buf_T *buf)
{
return apply_autocmds_group(event, fname, fname_io, force,
AUGROUP_ALL, buf, NULL);
}
/// Like apply_autocmds(), but with extra "eap" argument. This takes care of
/// setting v:filearg.
///
/// @param event event that occurred
/// @param fname NULL or empty means use actual file name
/// @param fname_io fname to use for <afile> on cmdline
/// @param force When true, ignore autocmd_busy
/// @param buf Buffer for <abuf>
/// @param exarg Ex command arguments
///
/// @return true if some commands were executed.
static bool apply_autocmds_exarg(event_T event, char_u *fname, char_u *fname_io,
bool force, buf_T *buf, exarg_T *eap)
{
return apply_autocmds_group(event, fname, fname_io, force,
AUGROUP_ALL, buf, eap);
}
/// Like apply_autocmds(), but handles the caller's retval. If the script
/// processing is being aborted or if retval is FAIL when inside a try
/// conditional, no autocommands are executed. If otherwise the autocommands
/// cause the script to be aborted, retval is set to FAIL.
///
/// @param event event that occurred
/// @param fname NULL or empty means use actual file name
/// @param fname_io fname to use for <afile> on cmdline
/// @param force When true, ignore autocmd_busy
/// @param buf Buffer for <abuf>
/// @param[in,out] retval caller's retval
///
/// @return true if some autocommands were executed
bool apply_autocmds_retval(event_T event, char_u *fname, char_u *fname_io,
bool force, buf_T *buf, int *retval)
{
if (should_abort(*retval)) {
return false;
}
bool did_cmd = apply_autocmds_group(event, fname, fname_io, force,
AUGROUP_ALL, buf, NULL);
if (did_cmd && aborting()) {
*retval = FAIL;
}
return did_cmd;
}
/// Return true when there is a CursorHold/CursorHoldI autocommand defined for
/// the current mode.
bool has_cursorhold(void) FUNC_ATTR_PURE FUNC_ATTR_WARN_UNUSED_RESULT
{
return first_autopat[(int)(get_real_state() == NORMAL_BUSY
? EVENT_CURSORHOLD : EVENT_CURSORHOLDI)] != NULL;
}
/// Return true if the CursorHold/CursorHoldI event can be triggered.
bool trigger_cursorhold(void) FUNC_ATTR_PURE FUNC_ATTR_WARN_UNUSED_RESULT
{
int state;
if (!did_cursorhold
&& has_cursorhold()
&& reg_recording == 0
&& typebuf.tb_len == 0
&& !ins_compl_active()
) {
state = get_real_state();
if (state == NORMAL_BUSY || (state & INSERT) != 0) {
return true;
}
}
return false;
}
/// Return true if "event" autocommand is defined.
///
/// @param event the autocommand to check
bool has_event(event_T event) FUNC_ATTR_PURE FUNC_ATTR_WARN_UNUSED_RESULT
{
return first_autopat[event] != NULL;
}
/// Execute autocommands for "event" and file name "fname".
///
/// @param event event that occurred
/// @param fname filename, NULL or empty means use actual file name
/// @param fname_io filename to use for <afile> on cmdline,
/// NULL means use `fname`.
/// @param force When true, ignore autocmd_busy
/// @param group autocmd group ID or AUGROUP_ALL
/// @param buf Buffer for <abuf>
/// @param eap Ex command arguments
///
/// @return true if some commands were executed.
static bool apply_autocmds_group(event_T event, char_u *fname, char_u *fname_io,
bool force, int group, buf_T *buf,
exarg_T *eap)
{
char_u *sfname = NULL; /* short file name */
char_u *tail;
bool save_changed;
buf_T *old_curbuf;
bool retval = false;
char_u *save_sourcing_name;
linenr_T save_sourcing_lnum;
char_u *save_autocmd_fname;
int save_autocmd_bufnr;
char_u *save_autocmd_match;
int save_autocmd_busy;
int save_autocmd_nested;
static int nesting = 0;
AutoPatCmd patcmd;
AutoPat *ap;
char_u *save_cmdarg;
long save_cmdbang;
static int filechangeshell_busy = FALSE;
proftime_T wait_time;
bool did_save_redobuff = false;
save_redo_T save_redo;
const bool save_KeyTyped = KeyTyped;
// Quickly return if there are no autocommands for this event or
// autocommands are blocked.
if (event == NUM_EVENTS || first_autopat[(int)event] == NULL
|| autocmd_blocked > 0) {
goto BYPASS_AU;
}
/*
* When autocommands are busy, new autocommands are only executed when
* explicitly enabled with the "nested" flag.
*/
if (autocmd_busy && !(force || autocmd_nested))
goto BYPASS_AU;
/*
* Quickly return when immediately aborting on error, or when an interrupt
* occurred or an exception was thrown but not caught.
*/
if (aborting())
goto BYPASS_AU;
/*
* FileChangedShell never nests, because it can create an endless loop.
*/
if (filechangeshell_busy && (event == EVENT_FILECHANGEDSHELL
|| event == EVENT_FILECHANGEDSHELLPOST))
goto BYPASS_AU;
/*
* Ignore events in 'eventignore'.
*/
if (event_ignored(event))
goto BYPASS_AU;
/*
* Allow nesting of autocommands, but restrict the depth, because it's
* possible to create an endless loop.
*/
if (nesting == 10) {
EMSG(_("E218: autocommand nesting too deep"));
goto BYPASS_AU;
}
/*
* Check if these autocommands are disabled. Used when doing ":all" or
* ":ball".
*/
if ( (autocmd_no_enter
&& (event == EVENT_WINENTER || event == EVENT_BUFENTER))
|| (autocmd_no_leave
&& (event == EVENT_WINLEAVE || event == EVENT_BUFLEAVE)))
goto BYPASS_AU;
/*
* Save the autocmd_* variables and info about the current buffer.
*/
save_autocmd_fname = autocmd_fname;
save_autocmd_bufnr = autocmd_bufnr;
save_autocmd_match = autocmd_match;
save_autocmd_busy = autocmd_busy;
save_autocmd_nested = autocmd_nested;
save_changed = curbuf->b_changed;
old_curbuf = curbuf;
/*
* Set the file name to be used for <afile>.
* Make a copy to avoid that changing a buffer name or directory makes it
* invalid.
*/
if (fname_io == NULL) {
if (event == EVENT_COLORSCHEME
|| event == EVENT_COLORSCHEMEPRE
|| event == EVENT_OPTIONSET) {
autocmd_fname = NULL;
} else if (fname != NULL && !ends_excmd(*fname)) {
autocmd_fname = fname;
} else if (buf != NULL) {
autocmd_fname = buf->b_ffname;
} else {
autocmd_fname = NULL;
}
} else {
autocmd_fname = fname_io;
}
if (autocmd_fname != NULL) {
// Allocate MAXPATHL for when eval_vars() resolves the fullpath.
autocmd_fname = vim_strnsave(autocmd_fname, MAXPATHL);
}
/*
* Set the buffer number to be used for <abuf>.
*/
if (buf == NULL)
autocmd_bufnr = 0;
else
autocmd_bufnr = buf->b_fnum;
/*
* When the file name is NULL or empty, use the file name of buffer "buf".
* Always use the full path of the file name to match with, in case
* "allow_dirs" is set.
*/
if (fname == NULL || *fname == NUL) {
if (buf == NULL)
fname = NULL;
else {
if (event == EVENT_SYNTAX)
fname = buf->b_p_syn;
else if (event == EVENT_FILETYPE)
fname = buf->b_p_ft;
else {
if (buf->b_sfname != NULL)
sfname = vim_strsave(buf->b_sfname);
fname = buf->b_ffname;
}
}
if (fname == NULL)
fname = (char_u *)"";
fname = vim_strsave(fname); /* make a copy, so we can change it */
} else {
sfname = vim_strsave(fname);
// Don't try expanding the following events.
if (event == EVENT_CMDLINECHANGED
|| event == EVENT_CMDLINEENTER
|| event == EVENT_CMDLINELEAVE
|| event == EVENT_CMDWINENTER
|| event == EVENT_CMDWINLEAVE
|| event == EVENT_CMDUNDEFINED
|| event == EVENT_COLORSCHEME
|| event == EVENT_COLORSCHEMEPRE
|| event == EVENT_DIRCHANGED
|| event == EVENT_FILETYPE
|| event == EVENT_FUNCUNDEFINED
|| event == EVENT_OPTIONSET
|| event == EVENT_QUICKFIXCMDPOST
|| event == EVENT_QUICKFIXCMDPRE
|| event == EVENT_REMOTEREPLY
|| event == EVENT_SPELLFILEMISSING
|| event == EVENT_SYNTAX
|| event == EVENT_SIGNAL
|| event == EVENT_TABCLOSED
|| event == EVENT_WINCLOSED) {
fname = vim_strsave(fname);
} else {
fname = (char_u *)FullName_save((char *)fname, false);
}
}
if (fname == NULL) { /* out of memory */
xfree(sfname);
retval = false;
goto BYPASS_AU;
}
#ifdef BACKSLASH_IN_FILENAME
// Replace all backslashes with forward slashes. This makes the
// autocommand patterns portable between Unix and Windows.
if (sfname != NULL) {
forward_slash(sfname);
}
forward_slash(fname);
#endif
/*
* Set the name to be used for <amatch>.
*/
autocmd_match = fname;
// Don't redraw while doing autocommands.
RedrawingDisabled++;
save_sourcing_name = sourcing_name;
sourcing_name = NULL; /* don't free this one */
save_sourcing_lnum = sourcing_lnum;
sourcing_lnum = 0; /* no line number here */
const sctx_T save_current_sctx = current_sctx;
if (do_profiling == PROF_YES)
prof_child_enter(&wait_time); /* doesn't count for the caller itself */
// Don't use local function variables, if called from a function.
funccal_entry_T funccal_entry;
save_funccal(&funccal_entry);
/*
* When starting to execute autocommands, save the search patterns.
*/
if (!autocmd_busy) {
save_search_patterns();
if (!ins_compl_active()) {
saveRedobuff(&save_redo);
did_save_redobuff = true;
}
did_filetype = keep_filetype;
}
/*
* Note that we are applying autocmds. Some commands need to know.
*/
autocmd_busy = TRUE;
filechangeshell_busy = (event == EVENT_FILECHANGEDSHELL);
++nesting; /* see matching decrement below */
/* Remember that FileType was triggered. Used for did_filetype(). */
if (event == EVENT_FILETYPE)
did_filetype = TRUE;
tail = path_tail(fname);
/* Find first autocommand that matches */
patcmd.curpat = first_autopat[(int)event];
patcmd.nextcmd = NULL;
patcmd.group = group;
patcmd.fname = fname;
patcmd.sfname = sfname;
patcmd.tail = tail;
patcmd.event = event;
patcmd.arg_bufnr = autocmd_bufnr;
patcmd.next = NULL;
auto_next_pat(&patcmd, false);
/* found one, start executing the autocommands */
if (patcmd.curpat != NULL) {
/* add to active_apc_list */
patcmd.next = active_apc_list;
active_apc_list = &patcmd;
// set v:cmdarg (only when there is a matching pattern)
save_cmdbang = (long)get_vim_var_nr(VV_CMDBANG);
if (eap != NULL) {
save_cmdarg = set_cmdarg(eap, NULL);
set_vim_var_nr(VV_CMDBANG, (long)eap->forceit);
} else {
save_cmdarg = NULL; // avoid gcc warning
}
retval = true;
// mark the last pattern, to avoid an endless loop when more patterns
// are added when executing autocommands
for (ap = patcmd.curpat; ap->next != NULL; ap = ap->next) {
ap->last = false;
}
ap->last = true;
check_lnums(true); // make sure cursor and topline are valid
// Execute the autocmd. The `getnextac` callback handles iteration.
do_cmdline(NULL, getnextac, (void *)&patcmd,
DOCMD_NOWAIT|DOCMD_VERBOSE|DOCMD_REPEAT);
reset_lnums(); // restore cursor and topline, unless they were changed
if (eap != NULL) {
(void)set_cmdarg(NULL, save_cmdarg);
set_vim_var_nr(VV_CMDBANG, save_cmdbang);
}
/* delete from active_apc_list */
if (active_apc_list == &patcmd) /* just in case */
active_apc_list = patcmd.next;
}
--RedrawingDisabled;
autocmd_busy = save_autocmd_busy;
filechangeshell_busy = FALSE;
autocmd_nested = save_autocmd_nested;
xfree(sourcing_name);
sourcing_name = save_sourcing_name;
sourcing_lnum = save_sourcing_lnum;
xfree(autocmd_fname);
autocmd_fname = save_autocmd_fname;
autocmd_bufnr = save_autocmd_bufnr;
autocmd_match = save_autocmd_match;
current_sctx = save_current_sctx;
restore_funccal();
if (do_profiling == PROF_YES) {
prof_child_exit(&wait_time);
}
KeyTyped = save_KeyTyped;
xfree(fname);
xfree(sfname);
--nesting; /* see matching increment above */
// When stopping to execute autocommands, restore the search patterns and
// the redo buffer. Free any buffers in the au_pending_free_buf list and
// free any windows in the au_pending_free_win list.
if (!autocmd_busy) {
restore_search_patterns();
if (did_save_redobuff) {
restoreRedobuff(&save_redo);
}
did_filetype = FALSE;
while (au_pending_free_buf != NULL) {
buf_T *b = au_pending_free_buf->b_next;
xfree(au_pending_free_buf);
au_pending_free_buf = b;
}
while (au_pending_free_win != NULL) {
win_T *w = au_pending_free_win->w_next;
xfree(au_pending_free_win);
au_pending_free_win = w;
}
}
/*
* Some events don't set or reset the Changed flag.
* Check if still in the same buffer!
*/
if (curbuf == old_curbuf
&& (event == EVENT_BUFREADPOST
|| event == EVENT_BUFWRITEPOST
|| event == EVENT_FILEAPPENDPOST
|| event == EVENT_VIMLEAVE
|| event == EVENT_VIMLEAVEPRE)) {
if (curbuf->b_changed != save_changed)
need_maketitle = TRUE;
curbuf->b_changed = save_changed;
}
au_cleanup(); /* may really delete removed patterns/commands now */
BYPASS_AU:
/* When wiping out a buffer make sure all its buffer-local autocommands
* are deleted. */
if (event == EVENT_BUFWIPEOUT && buf != NULL)
aubuflocal_remove(buf);
if (retval == OK && event == EVENT_FILETYPE) {
au_did_filetype = true;
}
return retval;
}
static char_u *old_termresponse = NULL;
/*
* Block triggering autocommands until unblock_autocmd() is called.
* Can be used recursively, so long as it's symmetric.
*/
void block_autocmds(void)
{
/* Remember the value of v:termresponse. */
if (autocmd_blocked == 0)
old_termresponse = get_vim_var_str(VV_TERMRESPONSE);
++autocmd_blocked;
}
void unblock_autocmds(void)
{
--autocmd_blocked;
/* When v:termresponse was set while autocommands were blocked, trigger
* the autocommands now. Esp. useful when executing a shell command
* during startup (nvim -d). */
if (autocmd_blocked == 0
&& get_vim_var_str(VV_TERMRESPONSE) != old_termresponse)
apply_autocmds(EVENT_TERMRESPONSE, NULL, NULL, FALSE, curbuf);
}
// Find next autocommand pattern that matches.
static void
auto_next_pat(
AutoPatCmd *apc,
int stop_at_last /* stop when 'last' flag is set */
)
{
AutoPat *ap;
AutoCmd *cp;
char *s;
XFREE_CLEAR(sourcing_name);
for (ap = apc->curpat; ap != NULL && !got_int; ap = ap->next) {
apc->curpat = NULL;
/* Only use a pattern when it has not been removed, has commands and
* the group matches. For buffer-local autocommands only check the
* buffer number. */
if (ap->pat != NULL && ap->cmds != NULL
&& (apc->group == AUGROUP_ALL || apc->group == ap->group)) {
/* execution-condition */
if (ap->buflocal_nr == 0
? match_file_pat(NULL, &ap->reg_prog, apc->fname, apc->sfname,
apc->tail, ap->allow_dirs)
: ap->buflocal_nr == apc->arg_bufnr) {
const char *const name = event_nr2name(apc->event);
s = _("%s Autocommands for \"%s\"");
const size_t sourcing_name_len = (STRLEN(s) + strlen(name) + ap->patlen
+ 1);
sourcing_name = xmalloc(sourcing_name_len);
snprintf((char *)sourcing_name, sourcing_name_len, s, name,
(char *)ap->pat);
if (p_verbose >= 8) {
verbose_enter();
smsg(_("Executing %s"), sourcing_name);
verbose_leave();
}
apc->curpat = ap;
apc->nextcmd = ap->cmds;
/* mark last command */
for (cp = ap->cmds; cp->next != NULL; cp = cp->next)
cp->last = FALSE;
cp->last = TRUE;
}
line_breakcheck();
if (apc->curpat != NULL) /* found a match */
break;
}
if (stop_at_last && ap->last)
break;
}
}
/// Get next autocommand command.
/// Called by do_cmdline() to get the next line for ":if".
/// @return allocated string, or NULL for end of autocommands.
char_u *getnextac(int c, void *cookie, int indent, bool do_concat)
{
AutoPatCmd *acp = (AutoPatCmd *)cookie;
char_u *retval;
AutoCmd *ac;
/* Can be called again after returning the last line. */
if (acp->curpat == NULL)
return NULL;
/* repeat until we find an autocommand to execute */
for (;; ) {
/* skip removed commands */
while (acp->nextcmd != NULL && acp->nextcmd->cmd == NULL)
if (acp->nextcmd->last)
acp->nextcmd = NULL;
else
acp->nextcmd = acp->nextcmd->next;
if (acp->nextcmd != NULL)
break;
/* at end of commands, find next pattern that matches */
if (acp->curpat->last)
acp->curpat = NULL;
else
acp->curpat = acp->curpat->next;
if (acp->curpat != NULL)
auto_next_pat(acp, TRUE);
if (acp->curpat == NULL)
return NULL;
}
ac = acp->nextcmd;
if (p_verbose >= 9) {
verbose_enter_scroll();
smsg(_("autocommand %s"), ac->cmd);
msg_puts("\n"); // don't overwrite this either
verbose_leave_scroll();
}
retval = vim_strsave(ac->cmd);
// Remove one-shot ("once") autocmd in anticipation of its execution.
if (ac->once) {
au_del_cmd(ac);
}
autocmd_nested = ac->nested;
current_sctx = ac->script_ctx;
if (ac->last) {
acp->nextcmd = NULL;
} else {
acp->nextcmd = ac->next;
}
return retval;
}
/// Return true if there is a matching autocommand for "fname".
/// To account for buffer-local autocommands, function needs to know
/// in which buffer the file will be opened.
///
/// @param event event that occurred.
/// @param sfname filename the event occurred in.
/// @param buf buffer the file is open in
bool has_autocmd(event_T event, char_u *sfname, buf_T *buf)
FUNC_ATTR_WARN_UNUSED_RESULT
{
AutoPat *ap;
char_u *fname;
char_u *tail = path_tail(sfname);
bool retval = false;
fname = (char_u *)FullName_save((char *)sfname, false);
if (fname == NULL) {
return false;
}
#ifdef BACKSLASH_IN_FILENAME
// Replace all backslashes with forward slashes. This makes the
// autocommand patterns portable between Unix and Windows.
sfname = vim_strsave(sfname);
forward_slash(sfname);
forward_slash(fname);
#endif
for (ap = first_autopat[(int)event]; ap != NULL; ap = ap->next) {
if (ap->pat != NULL && ap->cmds != NULL
&& (ap->buflocal_nr == 0
? match_file_pat(NULL, &ap->reg_prog, fname, sfname, tail,
ap->allow_dirs)
: buf != NULL && ap->buflocal_nr == buf->b_fnum)) {
retval = true;
break;
}
}
xfree(fname);
#ifdef BACKSLASH_IN_FILENAME
xfree(sfname);
#endif
return retval;
}
/*
* Function given to ExpandGeneric() to obtain the list of autocommand group
* names.
*/
char_u *get_augroup_name(expand_T *xp, int idx)
{
if (idx == augroups.ga_len) { // add "END" add the end
return (char_u *)"END";
}
if (idx >= augroups.ga_len) { // end of list
return NULL;
}
if (AUGROUP_NAME(idx) == NULL || AUGROUP_NAME(idx) == get_deleted_augroup()) {
// skip deleted entries
return (char_u *)"";
}
return (char_u *)AUGROUP_NAME(idx);
}
static int include_groups = FALSE;
char_u *
set_context_in_autocmd (
expand_T *xp,
char_u *arg,
int doautocmd /* TRUE for :doauto*, FALSE for :autocmd */
)
{
char_u *p;
int group;
/* check for a group name, skip it if present */
include_groups = FALSE;
p = arg;
group = au_get_grouparg(&arg);
/* If there only is a group name that's what we expand. */
if (*arg == NUL && group != AUGROUP_ALL && !ascii_iswhite(arg[-1])) {
arg = p;
group = AUGROUP_ALL;
}
/* skip over event name */
for (p = arg; *p != NUL && !ascii_iswhite(*p); ++p)
if (*p == ',')
arg = p + 1;
if (*p == NUL) {
if (group == AUGROUP_ALL)
include_groups = TRUE;
xp->xp_context = EXPAND_EVENTS; /* expand event name */
xp->xp_pattern = arg;
return NULL;
}
/* skip over pattern */
arg = skipwhite(p);
while (*arg && (!ascii_iswhite(*arg) || arg[-1] == '\\'))
arg++;
if (*arg)
return arg; /* expand (next) command */
if (doautocmd)
xp->xp_context = EXPAND_FILES; /* expand file names */
else
xp->xp_context = EXPAND_NOTHING; /* pattern is not expanded */
return NULL;
}
/*
* Function given to ExpandGeneric() to obtain the list of event names.
*/
char_u *get_event_name(expand_T *xp, int idx)
{
if (idx < augroups.ga_len) { // First list group names, if wanted
if (!include_groups || AUGROUP_NAME(idx) == NULL
|| AUGROUP_NAME(idx) == get_deleted_augroup()) {
return (char_u *)""; // skip deleted entries
}
return (char_u *)AUGROUP_NAME(idx);
}
return (char_u *)event_names[idx - augroups.ga_len].name;
}
/// Check whether given autocommand is supported
///
/// @param[in] event Event to check.
///
/// @return True if it is, false otherwise.
bool autocmd_supported(const char *const event)
FUNC_ATTR_PURE FUNC_ATTR_WARN_UNUSED_RESULT
{
char_u *p;
return event_name2nr((const char_u *)event, &p) != NUM_EVENTS;
}
/// Return true if an autocommand is defined for a group, event and
/// pattern: The group can be omitted to accept any group.
/// `event` and `pattern` can be omitted to accept any event and pattern.
/// Buffer-local patterns <buffer> or <buffer=N> are accepted.
/// Used for:
/// exists("#Group") or
/// exists("#Group#Event") or
/// exists("#Group#Event#pat") or
/// exists("#Event") or
/// exists("#Event#pat")
///
/// @param arg autocommand string
bool au_exists(const char *const arg) FUNC_ATTR_WARN_UNUSED_RESULT
{
event_T event;
AutoPat *ap;
buf_T *buflocal_buf = NULL;
int group;
bool retval = false;
// Make a copy so that we can change the '#' chars to a NUL.
char *const arg_save = xstrdup(arg);
char *p = strchr(arg_save, '#');
if (p != NULL) {
*p++ = NUL;
}
// First, look for an autocmd group name.
group = au_find_group((char_u *)arg_save);
char *event_name;
if (group == AUGROUP_ERROR) {
/* Didn't match a group name, assume the first argument is an event. */
group = AUGROUP_ALL;
event_name = arg_save;
} else {
if (p == NULL) {
// "Group": group name is present and it's recognized
retval = true;
goto theend;
}
// Must be "Group#Event" or "Group#Event#pat".
event_name = p;
p = strchr(event_name, '#');
if (p != NULL) {
*p++ = NUL; // "Group#Event#pat"
}
}
char *pattern = p; // "pattern" is NULL when there is no pattern.
// Find the index (enum) for the event name.
event = event_name2nr((char_u *)event_name, (char_u **)&p);
/* return FALSE if the event name is not recognized */
if (event == NUM_EVENTS)
goto theend;
/* Find the first autocommand for this event.
* If there isn't any, return FALSE;
* If there is one and no pattern given, return TRUE; */
ap = first_autopat[(int)event];
if (ap == NULL)
goto theend;
/* if pattern is "<buffer>", special handling is needed which uses curbuf */
/* for pattern "<buffer=N>, fnamecmp() will work fine */
if (pattern != NULL && STRICMP(pattern, "<buffer>") == 0)
buflocal_buf = curbuf;
/* Check if there is an autocommand with the given pattern. */
for (; ap != NULL; ap = ap->next)
/* only use a pattern when it has not been removed and has commands. */
/* For buffer-local autocommands, fnamecmp() works fine. */
if (ap->pat != NULL && ap->cmds != NULL
&& (group == AUGROUP_ALL || ap->group == group)
&& (pattern == NULL
|| (buflocal_buf == NULL
? fnamecmp(ap->pat, (char_u *)pattern) == 0
: ap->buflocal_nr == buflocal_buf->b_fnum))) {
retval = true;
break;
}
theend:
xfree(arg_save);
return retval;
}
/// Tries matching a filename with a "pattern" ("prog" is NULL), or use the
/// precompiled regprog "prog" ("pattern" is NULL). That avoids calling
/// vim_regcomp() often.
///
/// Used for autocommands and 'wildignore'.
///
/// @param pattern pattern to match with
/// @param prog pre-compiled regprog or NULL
/// @param fname full path of the file name
/// @param sfname short file name or NULL
/// @param tail tail of the path
/// @param allow_dirs Allow matching with dir
///
/// @return true if there is a match, false otherwise
static bool match_file_pat(char_u *pattern, regprog_T **prog, char_u *fname,
char_u *sfname, char_u *tail, int allow_dirs)
{
regmatch_T regmatch;
bool result = false;
regmatch.rm_ic = p_fic; /* ignore case if 'fileignorecase' is set */
{
if (prog != NULL)
regmatch.regprog = *prog;
else
regmatch.regprog = vim_regcomp(pattern, RE_MAGIC);
}
/*
* Try for a match with the pattern with:
* 1. the full file name, when the pattern has a '/'.
* 2. the short file name, when the pattern has a '/'.
* 3. the tail of the file name, when the pattern has no '/'.
*/
if (regmatch.regprog != NULL
&& ((allow_dirs
&& (vim_regexec(&regmatch, fname, (colnr_T)0)
|| (sfname != NULL
&& vim_regexec(&regmatch, sfname, (colnr_T)0))))
|| (!allow_dirs && vim_regexec(&regmatch, tail, (colnr_T)0)))) {
result = true;
}
if (prog != NULL) {
*prog = regmatch.regprog;
} else {
vim_regfree(regmatch.regprog);
}
return result;
}
/// Check if a file matches with a pattern in "list".
/// "list" is a comma-separated list of patterns, like 'wildignore'.
/// "sfname" is the short file name or NULL, "ffname" the long file name.
///
/// @param list list of patterns to match
/// @param sfname short file name
/// @param ffname full file name
///
/// @return true if there was a match
bool match_file_list(char_u *list, char_u *sfname, char_u *ffname)
FUNC_ATTR_WARN_UNUSED_RESULT FUNC_ATTR_NONNULL_ARG(1, 3)
{
char_u buf[100];
char_u *tail;
char_u *regpat;
char allow_dirs;
bool match;
char_u *p;
tail = path_tail(sfname);
// try all patterns in 'wildignore'
p = list;
while (*p) {
copy_option_part(&p, buf, ARRAY_SIZE(buf), ",");
regpat = file_pat_to_reg_pat(buf, NULL, &allow_dirs, false);
if (regpat == NULL) {
break;
}
match = match_file_pat(regpat, NULL, ffname, sfname, tail, (int)allow_dirs);
xfree(regpat);
if (match) {
return true;
}
}
return false;
}
/// Convert the given pattern "pat" which has shell style wildcards in it, into
/// a regular expression, and return the result in allocated memory. If there
/// is a directory path separator to be matched, then TRUE is put in
/// allow_dirs, otherwise FALSE is put there -- webb.
/// Handle backslashes before special characters, like "\*" and "\ ".
///
/// Returns NULL on failure.
char_u * file_pat_to_reg_pat(
const char_u *pat,
const char_u *pat_end, // first char after pattern or NULL
char *allow_dirs, // Result passed back out in here
int no_bslash // Don't use a backward slash as pathsep
)
FUNC_ATTR_NONNULL_ARG(1)
{
const char_u *endp;
char_u *reg_pat;
const char_u *p;
int nested = 0;
int add_dollar = TRUE;
if (allow_dirs != NULL)
*allow_dirs = FALSE;
if (pat_end == NULL)
pat_end = pat + STRLEN(pat);
if (pat_end == pat) {
return (char_u *)xstrdup("^$");
}
size_t size = 2; // '^' at start, '$' at end.
for (p = pat; p < pat_end; p++) {
switch (*p) {
case '*':
case '.':
case ',':
case '{':
case '}':
case '~':
size += 2; /* extra backslash */
break;
#ifdef BACKSLASH_IN_FILENAME
case '\\':
case '/':
size += 4; /* could become "[\/]" */
break;
#endif
default:
size++;
break;
}
}
reg_pat = xmalloc(size + 1);
size_t i = 0;
if (pat[0] == '*')
while (pat[0] == '*' && pat < pat_end - 1)
pat++;
else
reg_pat[i++] = '^';
endp = pat_end - 1;
if (endp >= pat && *endp == '*') {
while (endp - pat > 0 && *endp == '*') {
endp--;
}
add_dollar = false;
}
for (p = pat; *p && nested >= 0 && p <= endp; p++) {
switch (*p) {
case '*':
reg_pat[i++] = '.';
reg_pat[i++] = '*';
while (p[1] == '*') /* "**" matches like "*" */
++p;
break;
case '.':
case '~':
reg_pat[i++] = '\\';
reg_pat[i++] = *p;
break;
case '?':
reg_pat[i++] = '.';
break;
case '\\':
if (p[1] == NUL)
break;
#ifdef BACKSLASH_IN_FILENAME
if (!no_bslash) {
/* translate:
* "\x" to "\\x" e.g., "dir\file"
* "\*" to "\\.*" e.g., "dir\*.c"
* "\?" to "\\." e.g., "dir\??.c"
* "\+" to "\+" e.g., "fileX\+.c"
*/
if ((vim_isfilec(p[1]) || p[1] == '*' || p[1] == '?')
&& p[1] != '+') {
reg_pat[i++] = '[';
reg_pat[i++] = '\\';
reg_pat[i++] = '/';
reg_pat[i++] = ']';
if (allow_dirs != NULL)
*allow_dirs = TRUE;
break;
}
}
#endif
/* Undo escaping from ExpandEscape():
* foo\?bar -> foo?bar
* foo\%bar -> foo%bar
* foo\,bar -> foo,bar
* foo\ bar -> foo bar
* Don't unescape \, * and others that are also special in a
* regexp.
* An escaped { must be unescaped since we use magic not
* verymagic. Use "\\\{n,m\}"" to get "\{n,m}".
*/
if (*++p == '?'
#ifdef BACKSLASH_IN_FILENAME
&& no_bslash
#endif
) {
reg_pat[i++] = '?';
} else if (*p == ',' || *p == '%' || *p == '#'
|| ascii_isspace(*p) || *p == '{' || *p == '}') {
reg_pat[i++] = *p;
} else if (*p == '\\' && p[1] == '\\' && p[2] == '{') {
reg_pat[i++] = '\\';
reg_pat[i++] = '{';
p += 2;
} else {
if (allow_dirs != NULL && vim_ispathsep(*p)
#ifdef BACKSLASH_IN_FILENAME
&& (!no_bslash || *p != '\\')
#endif
)
*allow_dirs = TRUE;
reg_pat[i++] = '\\';
reg_pat[i++] = *p;
}
break;
#ifdef BACKSLASH_IN_FILENAME
case '/':
reg_pat[i++] = '[';
reg_pat[i++] = '\\';
reg_pat[i++] = '/';
reg_pat[i++] = ']';
if (allow_dirs != NULL)
*allow_dirs = TRUE;
break;
#endif
case '{':
reg_pat[i++] = '\\';
reg_pat[i++] = '(';
nested++;
break;
case '}':
reg_pat[i++] = '\\';
reg_pat[i++] = ')';
--nested;
break;
case ',':
if (nested) {
reg_pat[i++] = '\\';
reg_pat[i++] = '|';
} else
reg_pat[i++] = ',';
break;
default:
if (allow_dirs != NULL && vim_ispathsep(*p)) {
*allow_dirs = true;
}
reg_pat[i++] = *p;
break;
}
}
if (add_dollar)
reg_pat[i++] = '$';
reg_pat[i] = NUL;
if (nested != 0) {
if (nested < 0) {
EMSG(_("E219: Missing {."));
} else {
EMSG(_("E220: Missing }."));
}
XFREE_CLEAR(reg_pat);
}
return reg_pat;
}
#if defined(EINTR)
/*
* Version of read() that retries when interrupted by EINTR (possibly
* by a SIGWINCH).
*/
long read_eintr(int fd, void *buf, size_t bufsize)
{
long ret;
for (;; ) {
ret = read(fd, buf, bufsize);
if (ret >= 0 || errno != EINTR)
break;
}
return ret;
}
/*
* Version of write() that retries when interrupted by EINTR (possibly
* by a SIGWINCH).
*/
long write_eintr(int fd, void *buf, size_t bufsize)
{
long ret = 0;
long wlen;
/* Repeat the write() so long it didn't fail, other than being interrupted
* by a signal. */
while (ret < (long)bufsize) {
wlen = write(fd, (char *)buf + ret, bufsize - ret);
if (wlen < 0) {
if (errno != EINTR)
break;
} else
ret += wlen;
}
return ret;
}
#endif
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