Commit d11dbf09 authored by Michael Niedermayer's avatar Michael Niedermayer
Browse files

av_get_token()

based on a patch by Stefano Sabatini

Originally committed as revision 18725 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 71412781
/*
* copyright (c) 2009 Stefano Sabatini
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file libavfilter/parseutils.c
* parsing utils
*/
#include <string.h>
#include "libavutil/avutil.h"
#include "parseutils.h"
#define WHITESPACES " \n\t"
char *av_get_token(const char **buf, const char *term)
{
char *out = av_malloc(strlen(*buf) + 1);
char *ret= out, *end= out;
const char *p = *buf;
p += strspn(p, WHITESPACES);
while(*p && !strspn(p, term)) {
char c = *p++;
if(c == '\\' && *p){
*out++ = *p++;
end= out;
}else if(c == '\''){
while(*p && *p != '\'')
*out++ = *p++;
if(*p){
p++;
end= out;
}
}else{
*out++ = c;
}
}
do{
*out-- = 0;
}while(out >= end && strspn(out, WHITESPACES));
*buf = p;
return ret;
}
#ifdef TEST
#undef printf
int main()
{
int i;
const char *strings[] = {
"''",
"",
":",
"\\",
"'",
" '' :",
" '' '' :",
"foo '' :",
"'foo'",
"foo ",
"foo\\",
"foo': blah:blah",
"foo\\: blah:blah",
"foo\'",
"'foo : ' :blahblah",
"\\ :blah",
" foo",
" foo ",
" foo \\ ",
"foo ':blah",
" foo bar : blahblah",
"\\f\\o\\o",
"'foo : \\ \\ ' : blahblah",
"'\\fo\\o:': blahblah",
"\\'fo\\o\\:': foo ' :blahblah"
};
for (i=0; i < FF_ARRAY_ELEMS(strings); i++) {
const char *p= strings[i];
printf("|%s|", p);
printf(" -> |%s|", av_get_token(&p, ":"));
printf(" + |%s|\n", p);
}
return 0;
}
#endif
/*
* copyright (c) 2009 Stefano Sabatini
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file libavfilter/parseutils.h
* parsing utils
*/
#ifndef AVFILTER_PARSEUTILS_H
#define AVFILTER_PARSEUTILS_H
/**
* Unescapes the given string until a non escaped terminating char,
* and returns the token corresponding to the unescaped string.
*
* The normal \ and ' escaping is supported. Leading and trailing
* whitespaces are removed.
*
* @param term a 0-terminated list of terminating chars
* @param buf the buffer to parse, buf will be updated to point to the
* terminating char
* @return the malloced unescaped string, which must be av_freed by
* the user
*/
char *av_get_token(const char **buf, const char *term);
#endif /* AVFILTER_PARSEUTILS_H */
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