Browse code
av_get_token() based on a patch by Stefano Sabatini
Originally committed as revision 18725 to svn://svn.ffmpeg.org/ffmpeg/trunk
Michael Niedermayer authored on 2009/05/01 23:38:07Showing 2 changed files
| 1 | 1 |
new file mode 100644 |
| ... | ... |
@@ -0,0 +1,110 @@ |
| 0 |
+/* |
|
| 1 |
+ * copyright (c) 2009 Stefano Sabatini |
|
| 2 |
+ * This file is part of FFmpeg. |
|
| 3 |
+ * |
|
| 4 |
+ * FFmpeg is free software; you can redistribute it and/or |
|
| 5 |
+ * modify it under the terms of the GNU Lesser General Public |
|
| 6 |
+ * License as published by the Free Software Foundation; either |
|
| 7 |
+ * version 2.1 of the License, or (at your option) any later version. |
|
| 8 |
+ * |
|
| 9 |
+ * FFmpeg is distributed in the hope that it will be useful, |
|
| 10 |
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
| 11 |
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
| 12 |
+ * Lesser General Public License for more details. |
|
| 13 |
+ * |
|
| 14 |
+ * You should have received a copy of the GNU Lesser General Public |
|
| 15 |
+ * License along with FFmpeg; if not, write to the Free Software |
|
| 16 |
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
| 17 |
+ */ |
|
| 18 |
+ |
|
| 19 |
+/** |
|
| 20 |
+ * @file libavfilter/parseutils.c |
|
| 21 |
+ * parsing utils |
|
| 22 |
+ */ |
|
| 23 |
+ |
|
| 24 |
+#include <string.h> |
|
| 25 |
+#include "libavutil/avutil.h" |
|
| 26 |
+#include "parseutils.h" |
|
| 27 |
+ |
|
| 28 |
+#define WHITESPACES " \n\t" |
|
| 29 |
+ |
|
| 30 |
+char *av_get_token(const char **buf, const char *term) |
|
| 31 |
+{
|
|
| 32 |
+ char *out = av_malloc(strlen(*buf) + 1); |
|
| 33 |
+ char *ret= out, *end= out; |
|
| 34 |
+ const char *p = *buf; |
|
| 35 |
+ p += strspn(p, WHITESPACES); |
|
| 36 |
+ |
|
| 37 |
+ while(*p && !strspn(p, term)) {
|
|
| 38 |
+ char c = *p++; |
|
| 39 |
+ if(c == '\\' && *p){
|
|
| 40 |
+ *out++ = *p++; |
|
| 41 |
+ end= out; |
|
| 42 |
+ }else if(c == '\''){
|
|
| 43 |
+ while(*p && *p != '\'') |
|
| 44 |
+ *out++ = *p++; |
|
| 45 |
+ if(*p){
|
|
| 46 |
+ p++; |
|
| 47 |
+ end= out; |
|
| 48 |
+ } |
|
| 49 |
+ }else{
|
|
| 50 |
+ *out++ = c; |
|
| 51 |
+ } |
|
| 52 |
+ } |
|
| 53 |
+ |
|
| 54 |
+ do{
|
|
| 55 |
+ *out-- = 0; |
|
| 56 |
+ }while(out >= end && strspn(out, WHITESPACES)); |
|
| 57 |
+ |
|
| 58 |
+ *buf = p; |
|
| 59 |
+ |
|
| 60 |
+ return ret; |
|
| 61 |
+} |
|
| 62 |
+ |
|
| 63 |
+#ifdef TEST |
|
| 64 |
+ |
|
| 65 |
+#undef printf |
|
| 66 |
+ |
|
| 67 |
+int main() |
|
| 68 |
+{
|
|
| 69 |
+ int i; |
|
| 70 |
+ |
|
| 71 |
+ const char *strings[] = {
|
|
| 72 |
+ "''", |
|
| 73 |
+ "", |
|
| 74 |
+ ":", |
|
| 75 |
+ "\\", |
|
| 76 |
+ "'", |
|
| 77 |
+ " '' :", |
|
| 78 |
+ " '' '' :", |
|
| 79 |
+ "foo '' :", |
|
| 80 |
+ "'foo'", |
|
| 81 |
+ "foo ", |
|
| 82 |
+ "foo\\", |
|
| 83 |
+ "foo': blah:blah", |
|
| 84 |
+ "foo\\: blah:blah", |
|
| 85 |
+ "foo\'", |
|
| 86 |
+ "'foo : ' :blahblah", |
|
| 87 |
+ "\\ :blah", |
|
| 88 |
+ " foo", |
|
| 89 |
+ " foo ", |
|
| 90 |
+ " foo \\ ", |
|
| 91 |
+ "foo ':blah", |
|
| 92 |
+ " foo bar : blahblah", |
|
| 93 |
+ "\\f\\o\\o", |
|
| 94 |
+ "'foo : \\ \\ ' : blahblah", |
|
| 95 |
+ "'\\fo\\o:': blahblah", |
|
| 96 |
+ "\\'fo\\o\\:': foo ' :blahblah" |
|
| 97 |
+ }; |
|
| 98 |
+ |
|
| 99 |
+ for (i=0; i < FF_ARRAY_ELEMS(strings); i++) {
|
|
| 100 |
+ const char *p= strings[i]; |
|
| 101 |
+ printf("|%s|", p);
|
|
| 102 |
+ printf(" -> |%s|", av_get_token(&p, ":"));
|
|
| 103 |
+ printf(" + |%s|\n", p);
|
|
| 104 |
+ } |
|
| 105 |
+ |
|
| 106 |
+ return 0; |
|
| 107 |
+} |
|
| 108 |
+ |
|
| 109 |
+#endif |
| 0 | 110 |
new file mode 100644 |
| ... | ... |
@@ -0,0 +1,43 @@ |
| 0 |
+/* |
|
| 1 |
+ * copyright (c) 2009 Stefano Sabatini |
|
| 2 |
+ * This file is part of FFmpeg. |
|
| 3 |
+ * |
|
| 4 |
+ * FFmpeg is free software; you can redistribute it and/or |
|
| 5 |
+ * modify it under the terms of the GNU Lesser General Public |
|
| 6 |
+ * License as published by the Free Software Foundation; either |
|
| 7 |
+ * version 2.1 of the License, or (at your option) any later version. |
|
| 8 |
+ * |
|
| 9 |
+ * FFmpeg is distributed in the hope that it will be useful, |
|
| 10 |
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
| 11 |
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
| 12 |
+ * Lesser General Public License for more details. |
|
| 13 |
+ * |
|
| 14 |
+ * You should have received a copy of the GNU Lesser General Public |
|
| 15 |
+ * License along with FFmpeg; if not, write to the Free Software |
|
| 16 |
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
| 17 |
+ */ |
|
| 18 |
+ |
|
| 19 |
+/** |
|
| 20 |
+ * @file libavfilter/parseutils.h |
|
| 21 |
+ * parsing utils |
|
| 22 |
+ */ |
|
| 23 |
+ |
|
| 24 |
+#ifndef AVFILTER_PARSEUTILS_H |
|
| 25 |
+#define AVFILTER_PARSEUTILS_H |
|
| 26 |
+ |
|
| 27 |
+/** |
|
| 28 |
+ * Unescapes the given string until a non escaped terminating char, |
|
| 29 |
+ * and returns the token corresponding to the unescaped string. |
|
| 30 |
+ * |
|
| 31 |
+ * The normal \ and ' escaping is supported. Leading and trailing |
|
| 32 |
+ * whitespaces are removed. |
|
| 33 |
+ * |
|
| 34 |
+ * @param term a 0-terminated list of terminating chars |
|
| 35 |
+ * @param buf the buffer to parse, buf will be updated to point to the |
|
| 36 |
+ * terminating char |
|
| 37 |
+ * @return the malloced unescaped string, which must be av_freed by |
|
| 38 |
+ * the user |
|
| 39 |
+ */ |
|
| 40 |
+char *av_get_token(const char **buf, const char *term); |
|
| 41 |
+ |
|
| 42 |
+#endif /* AVFILTER_PARSEUTILS_H */ |