Originally committed as revision 18725 to svn://svn.ffmpeg.org/ffmpeg/trunk
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| 1 | /* | ||
| 2 | * copyright (c) 2009 Stefano Sabatini | ||
| 3 | * This file is part of FFmpeg. | ||
| 4 | * | ||
| 5 | * FFmpeg is free software; you can redistribute it and/or | ||
| 6 | * modify it under the terms of the GNU Lesser General Public | ||
| 7 | * License as published by the Free Software Foundation; either | ||
| 8 | * version 2.1 of the License, or (at your option) any later version. | ||
| 9 | * | ||
| 10 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 13 | * Lesser General Public License for more details. | ||
| 14 | * | ||
| 15 | * You should have received a copy of the GNU Lesser General Public | ||
| 16 | * License along with FFmpeg; if not, write to the Free Software | ||
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 18 | */ | ||
| 19 | |||
| 20 | /** | ||
| 21 | * @file libavfilter/parseutils.c | ||
| 22 | * parsing utils | ||
| 23 | */ | ||
| 24 | |||
| 25 | #include <string.h> | ||
| 26 | #include "libavutil/avutil.h" | ||
| 27 | #include "parseutils.h" | ||
| 28 | |||
| 29 | #define WHITESPACES " \n\t" | ||
| 30 | |||
| 31 | char *av_get_token(const char **buf, const char *term) | ||
| 32 | { | ||
| 33 | char *out = av_malloc(strlen(*buf) + 1); | ||
| 34 | char *ret= out, *end= out; | ||
| 35 | const char *p = *buf; | ||
| 36 | p += strspn(p, WHITESPACES); | ||
| 37 | |||
| 38 | while(*p && !strspn(p, term)) { | ||
| 39 | char c = *p++; | ||
| 40 | if(c == '\\' && *p){ | ||
| 41 | *out++ = *p++; | ||
| 42 | end= out; | ||
| 43 | }else if(c == '\''){ | ||
| 44 | while(*p && *p != '\'') | ||
| 45 | *out++ = *p++; | ||
| 46 | if(*p){ | ||
| 47 | p++; | ||
| 48 | end= out; | ||
| 49 | } | ||
| 50 | }else{ | ||
| 51 | *out++ = c; | ||
| 52 | } | ||
| 53 | } | ||
| 54 | |||
| 55 | do{ | ||
| 56 | *out-- = 0; | ||
| 57 | }while(out >= end && strspn(out, WHITESPACES)); | ||
| 58 | |||
| 59 | *buf = p; | ||
| 60 | |||
| 61 | return ret; | ||
| 62 | } | ||
| 63 | |||
| 64 | #ifdef TEST | ||
| 65 | |||
| 66 | #undef printf | ||
| 67 | |||
| 68 | int main() | ||
| 69 | { | ||
| 70 | int i; | ||
| 71 | |||
| 72 | const char *strings[] = { | ||
| 73 | "''", | ||
| 74 | "", | ||
| 75 | ":", | ||
| 76 | "\\", | ||
| 77 | "'", | ||
| 78 | " '' :", | ||
| 79 | " '' '' :", | ||
| 80 | "foo '' :", | ||
| 81 | "'foo'", | ||
| 82 | "foo ", | ||
| 83 | "foo\\", | ||
| 84 | "foo': blah:blah", | ||
| 85 | "foo\\: blah:blah", | ||
| 86 | "foo\'", | ||
| 87 | "'foo : ' :blahblah", | ||
| 88 | "\\ :blah", | ||
| 89 | " foo", | ||
| 90 | " foo ", | ||
| 91 | " foo \\ ", | ||
| 92 | "foo ':blah", | ||
| 93 | " foo bar : blahblah", | ||
| 94 | "\\f\\o\\o", | ||
| 95 | "'foo : \\ \\ ' : blahblah", | ||
| 96 | "'\\fo\\o:': blahblah", | ||
| 97 | "\\'fo\\o\\:': foo ' :blahblah" | ||
| 98 | }; | ||
| 99 | |||
| 100 | for (i=0; i < FF_ARRAY_ELEMS(strings); i++) { | ||
| 101 | const char *p= strings[i]; | ||
| 102 | printf("|%s|", p); | ||
| 103 | printf(" -> |%s|", av_get_token(&p, ":")); | ||
| 104 | printf(" + |%s|\n", p); | ||
| 105 | } | ||
| 106 | |||
| 107 | return 0; | ||
| 108 | } | ||
| 109 | |||
| 110 | #endif | ||
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| 1 | /* | ||
| 2 | * copyright (c) 2009 Stefano Sabatini | ||
| 3 | * This file is part of FFmpeg. | ||
| 4 | * | ||
| 5 | * FFmpeg is free software; you can redistribute it and/or | ||
| 6 | * modify it under the terms of the GNU Lesser General Public | ||
| 7 | * License as published by the Free Software Foundation; either | ||
| 8 | * version 2.1 of the License, or (at your option) any later version. | ||
| 9 | * | ||
| 10 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 13 | * Lesser General Public License for more details. | ||
| 14 | * | ||
| 15 | * You should have received a copy of the GNU Lesser General Public | ||
| 16 | * License along with FFmpeg; if not, write to the Free Software | ||
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 18 | */ | ||
| 19 | |||
| 20 | /** | ||
| 21 | * @file libavfilter/parseutils.h | ||
| 22 | * parsing utils | ||
| 23 | */ | ||
| 24 | |||
| 25 | #ifndef AVFILTER_PARSEUTILS_H | ||
| 26 | #define AVFILTER_PARSEUTILS_H | ||
| 27 | |||
| 28 | /** | ||
| 29 | * Unescapes the given string until a non escaped terminating char, | ||
| 30 | * and returns the token corresponding to the unescaped string. | ||
| 31 | * | ||
| 32 | * The normal \ and ' escaping is supported. Leading and trailing | ||
| 33 | * whitespaces are removed. | ||
| 34 | * | ||
| 35 | * @param term a 0-terminated list of terminating chars | ||
| 36 | * @param buf the buffer to parse, buf will be updated to point to the | ||
| 37 | * terminating char | ||
| 38 | * @return the malloced unescaped string, which must be av_freed by | ||
| 39 | * the user | ||
| 40 | */ | ||
| 41 | char *av_get_token(const char **buf, const char *term); | ||
| 42 | |||
| 43 | #endif /* AVFILTER_PARSEUTILS_H */ | ||