2 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
3 * Copyright (c) 2007 Mans Rullgard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
33 int av_strstart(const char *str, const char *pfx, const char **ptr)
35 while (*pfx && *pfx == *str) {
44 int av_stristart(const char *str, const char *pfx, const char **ptr)
46 while (*pfx && av_toupper((unsigned)*pfx) == av_toupper((unsigned)*str)) {
55 char *av_stristr(const char *s1, const char *s2)
58 return (char*)(intptr_t)s1;
61 if (av_stristart(s1, s2, NULL))
62 return (char*)(intptr_t)s1;
68 char *av_strnstr(const char *haystack, const char *needle, size_t hay_length)
70 size_t needle_len = strlen(needle);
72 return (char*)haystack;
73 while (hay_length >= needle_len) {
75 if (!memcmp(haystack, needle, needle_len))
76 return (char*)haystack;
82 size_t av_strlcpy(char *dst, const char *src, size_t size)
85 while (++len < size && *src)
89 return len + strlen(src) - 1;
92 size_t av_strlcat(char *dst, const char *src, size_t size)
94 size_t len = strlen(dst);
96 return len + strlen(src);
97 return len + av_strlcpy(dst + len, src, size - len);
100 size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
102 int len = strlen(dst);
106 len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);
112 char *av_asprintf(const char *fmt, ...)
119 len = vsnprintf(NULL, 0, fmt, va);
124 p = av_malloc(len + 1);
129 len = vsnprintf(p, len + 1, fmt, va);
138 char *av_d2str(double d)
140 char *str = av_malloc(16);
142 snprintf(str, 16, "%f", d);
146 #define WHITESPACES " \n\t"
148 char *av_get_token(const char **buf, const char *term)
150 char *out = av_malloc(strlen(*buf) + 1);
151 char *ret = out, *end = out;
152 const char *p = *buf;
155 p += strspn(p, WHITESPACES);
157 while (*p && !strspn(p, term)) {
159 if (c == '\\' && *p) {
162 } else if (c == '\'') {
163 while (*p && *p != '\'')
176 while (out >= end && strspn(out, WHITESPACES));
183 char *av_strtok(char *s, const char *delim, char **saveptr)
187 if (!s && !(s = *saveptr))
190 /* skip leading delimiters */
191 s += strspn(s, delim);
193 /* s now points to the first non delimiter char, or to the end of the string */
200 /* skip non delimiters */
201 s += strcspn(s, delim);
212 int av_strcasecmp(const char *a, const char *b)
216 c1 = av_tolower(*a++);
217 c2 = av_tolower(*b++);
218 } while (c1 && c1 == c2);
222 int av_strncasecmp(const char *a, const char *b, size_t n)
224 const char *end = a + n;
227 c1 = av_tolower(*a++);
228 c2 = av_tolower(*b++);
229 } while (a < end && c1 && c1 == c2);
233 const char *av_basename(const char *path)
235 char *p = strrchr(path, '/');
238 char *q = strrchr(path, '\\');
239 char *d = strchr(path, ':');
250 const char *av_dirname(char *path)
252 char *p = strrchr(path, '/');
255 char *q = strrchr(path, '\\');
256 char *d = strchr(path, ':');
271 int av_escape(char **dst, const char *src, const char *special_chars,
272 enum AVEscapeMode mode, int flags)
276 av_bprint_init(&dstbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
277 av_bprint_escape(&dstbuf, src, special_chars, mode, flags);
279 if (!av_bprint_is_complete(&dstbuf)) {
280 av_bprint_finalize(&dstbuf, NULL);
281 return AVERROR(ENOMEM);
283 av_bprint_finalize(&dstbuf, dst);
288 int av_isdigit(int c)
290 return c >= '0' && c <= '9';
293 int av_isgraph(int c)
295 return c > 32 && c < 127;
298 int av_isspace(int c)
300 return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' ||
304 int av_isxdigit(int c)
307 return av_isdigit(c) || (c >= 'a' && c <= 'f');
310 int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
313 const uint8_t *p = *bufp;
323 /* first sequence byte starts with 10, or is 1111-1110 or 1111-1111,
324 which is not admitted */
325 if ((code & 0xc0) == 0x80 || code >= 0xFE) {
326 ret = AVERROR(EILSEQ);
329 top = (code & 128) >> 1;
334 ret = AVERROR(EILSEQ); /* incomplete sequence */
338 /* we assume the byte to be in the form 10xx-xxxx */
339 tmp = *p++ - 128; /* strip leading 1 */
341 ret = AVERROR(EILSEQ);
344 code = (code<<6) + tmp;
347 code &= (top << 1) - 1;
350 ret = AVERROR(EILSEQ); /* out-of-range value */
356 if (code > 0x10FFFF &&
357 !(flags & AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES))
358 ret = AVERROR(EILSEQ);
359 if (code < 0x20 && code != 0x9 && code != 0xA && code != 0xD &&
360 flags & AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES)
361 ret = AVERROR(EILSEQ);
362 if (code >= 0xD800 && code <= 0xDFFF &&
363 !(flags & AV_UTF8_FLAG_ACCEPT_SURROGATES))
364 ret = AVERROR(EILSEQ);
365 if ((code == 0xFFFE || code == 0xFFFF) &&
366 !(flags & AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS))
367 ret = AVERROR(EILSEQ);
379 static const char * const strings[] = {
395 "'foo : ' :blahblah",
401 " foo bar : blahblah",
403 "'foo : \\ \\ ' : blahblah",
404 "'\\fo\\o:': blahblah",
405 "\\'fo\\o\\:': foo ' :blahblah"
408 printf("Testing av_get_token()\n");
409 for (i = 0; i < FF_ARRAY_ELEMS(strings); i++) {
410 const char *p = strings[i];
413 q = av_get_token(&p, ":");
414 printf(" -> |%s|", q);
415 printf(" + |%s|\n", p);