78 lines
1.4 KiB
C
78 lines
1.4 KiB
C
/* SPDX-License-Identifier: BSD
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*
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* Copyright © 2017-2019 WireGuard LLC. All Rights Reserved.
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*
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*/
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#define FILE_IS_EMPTY
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#if defined(__ANDROID_API__) && __ANDROID_API__ < 18
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#undef FILE_IS_EMPTY
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#include <stdio.h>
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#include <stdlib.h>
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ssize_t getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp)
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{
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char *ptr, *eptr;
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if (*buf == NULL || *bufsiz == 0) {
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*bufsiz = BUFSIZ;
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if ((*buf = malloc(*bufsiz)) == NULL)
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return -1;
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}
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for (ptr = *buf, eptr = *buf + *bufsiz;;) {
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int c = fgetc(fp);
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if (c == -1) {
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if (feof(fp)) {
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ssize_t diff = (ssize_t)(ptr - *buf);
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if (diff != 0) {
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*ptr = '\0';
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return diff;
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}
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}
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return -1;
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}
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*ptr++ = c;
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if (c == delimiter) {
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*ptr = '\0';
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return ptr - *buf;
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}
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if (ptr + 2 >= eptr) {
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char *nbuf;
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size_t nbufsiz = *bufsiz * 2;
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ssize_t d = ptr - *buf;
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if ((nbuf = realloc(*buf, nbufsiz)) == NULL)
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return -1;
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*buf = nbuf;
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*bufsiz = nbufsiz;
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eptr = nbuf + nbufsiz;
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ptr = nbuf + d;
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}
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}
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}
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ssize_t getline(char **buf, size_t *bufsiz, FILE *fp)
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{
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return getdelim(buf, bufsiz, '\n', fp);
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}
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#endif
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#if defined(__ANDROID_API__) && __ANDROID_API__ < 24
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#undef FILE_IS_EMPTY
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#include <string.h>
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char *strchrnul(const char *s, int c)
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{
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char *x = strchr(s, c);
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if (!x)
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return (char *)s + strlen(s);
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return x;
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}
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#endif
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#ifdef FILE_IS_EMPTY
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#undef FILE_IS_EMPTY
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static char ____x __attribute__((unused));
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#endif
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