76 lines
1.9 KiB
Plaintext
76 lines
1.9 KiB
Plaintext
/* scanner generator for flashmap descriptor language */
|
|
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
%{
|
|
#include "fmd_parser.h"
|
|
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
|
|
int parse_integer(char *src, int base);
|
|
int copy_string(const char *src);
|
|
%}
|
|
|
|
%option noyywrap
|
|
%s FLAGS
|
|
|
|
MULTIPLIER [KMG]
|
|
|
|
%%
|
|
[[:space:]]+ /* Eat whitespace. */
|
|
#.*$ /* Eat comments. */
|
|
\( BEGIN(FLAGS); return *yytext;
|
|
<FLAGS>\) BEGIN(INITIAL); return *yytext;
|
|
<FLAGS>CBFS return FLAG_CBFS;
|
|
<FLAGS>PRESERVE return FLAG_PRESERVE;
|
|
0{MULTIPLIER}? |
|
|
[1-9][0-9]*{MULTIPLIER}? return parse_integer(yytext, 10);
|
|
0[0-9]+{MULTIPLIER}? return OCTAL;
|
|
0[xX][0-9a-fA-F]+{MULTIPLIER}? return parse_integer(yytext + 2, 16);
|
|
[^#@{}()[:space:]]* return copy_string(yytext);
|
|
. return *yytext;
|
|
|
|
%%
|
|
|
|
int parse_integer(char *src, int base)
|
|
{
|
|
char *multiplier = NULL;
|
|
unsigned val = strtoul(src, &multiplier, base);
|
|
|
|
if (*multiplier) {
|
|
switch(*multiplier) {
|
|
case 'K':
|
|
val *= 1024;
|
|
break;
|
|
case 'M':
|
|
val *= 1024*1024;
|
|
break;
|
|
case 'G':
|
|
val *= 1024*1024*1024;
|
|
break;
|
|
default:
|
|
// If we ever get here, the MULTIPLIER regex is allowing
|
|
// multiplier suffixes not handled by this code.
|
|
assert(false);
|
|
}
|
|
}
|
|
|
|
yylval.intval = val;
|
|
return INTEGER;
|
|
}
|
|
|
|
int copy_string(const char *src)
|
|
{
|
|
yylval.strval = strdup(src);
|
|
return STRING;
|
|
}
|