/* * 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