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
34 int av_strstart(const char *str, const char *pfx, const char **ptr)
36 while (*pfx && *pfx == *str) {
45 int av_stristart(const char *str, const char *pfx, const char **ptr)
47 while (*pfx && av_toupper((unsigned)*pfx) == av_toupper((unsigned)*str)) {
56 char *av_stristr(const char *s1, const char *s2)
59 return (char*)(intptr_t)s1;
62 if (av_stristart(s1, s2, NULL))
63 return (char*)(intptr_t)s1;
69 char *av_strnstr(const char *haystack, const char *needle, size_t hay_length)
71 size_t needle_len = strlen(needle);
73 return (char*)haystack;
74 while (hay_length >= needle_len) {
76 if (!memcmp(haystack, needle, needle_len))
77 return (char*)haystack;
83 size_t av_strlcpy(char *dst, const char *src, size_t size)
86 while (++len < size && *src)
90 return len + strlen(src) - 1;
93 size_t av_strlcat(char *dst, const char *src, size_t size)
95 size_t len = strlen(dst);
97 return len + strlen(src);
98 return len + av_strlcpy(dst + len, src, size - len);
101 size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
103 int len = strlen(dst);
107 len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);
113 char *av_asprintf(const char *fmt, ...)
120 len = vsnprintf(NULL, 0, fmt, va);
125 p = av_malloc(len + 1);
130 len = vsnprintf(p, len + 1, fmt, va);
139 char *av_d2str(double d)
141 char *str = av_malloc(16);
143 snprintf(str, 16, "%f", d);
147 #define WHITESPACES " \n\t"
149 char *av_get_token(const char **buf, const char *term)
151 char *out = av_malloc(strlen(*buf) + 1);
152 char *ret = out, *end = out;
153 const char *p = *buf;
156 p += strspn(p, WHITESPACES);
158 while (*p && !strspn(p, term)) {
160 if (c == '\\' && *p) {
163 } else if (c == '\'') {
164 while (*p && *p != '\'')
177 while (out >= end && strspn(out, WHITESPACES));
184 char *av_strtok(char *s, const char *delim, char **saveptr)
188 if (!s && !(s = *saveptr))
191 /* skip leading delimiters */
192 s += strspn(s, delim);
194 /* s now points to the first non delimiter char, or to the end of the string */
201 /* skip non delimiters */
202 s += strcspn(s, delim);
213 int av_strcasecmp(const char *a, const char *b)
217 c1 = av_tolower(*a++);
218 c2 = av_tolower(*b++);
219 } while (c1 && c1 == c2);
223 int av_strncasecmp(const char *a, const char *b, size_t n)
225 const char *end = a + n;
228 c1 = av_tolower(*a++);
229 c2 = av_tolower(*b++);
230 } while (a < end && c1 && c1 == c2);
234 const char *av_basename(const char *path)
236 char *p = strrchr(path, '/');
239 char *q = strrchr(path, '\\');
240 char *d = strchr(path, ':');
251 const char *av_dirname(char *path)
253 char *p = strrchr(path, '/');
256 char *q = strrchr(path, '\\');
257 char *d = strchr(path, ':');
272 int av_escape(char **dst, const char *src, const char *special_chars,
273 enum AVEscapeMode mode, int flags)
277 av_bprint_init(&dstbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
278 av_bprint_escape(&dstbuf, src, special_chars, mode, flags);
280 if (!av_bprint_is_complete(&dstbuf)) {
281 av_bprint_finalize(&dstbuf, NULL);
282 return AVERROR(ENOMEM);
284 av_bprint_finalize(&dstbuf, dst);
289 int av_isdigit(int c)
291 return c >= '0' && c <= '9';
294 int av_isgraph(int c)
296 return c > 32 && c < 127;
299 int av_isspace(int c)
301 return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' ||
305 int av_isxdigit(int c)
308 return av_isdigit(c) || (c >= 'a' && c <= 'f');
311 int av_match_name(const char *name, const char *names)
319 namelen = strlen(name);
320 while ((p = strchr(names, ','))) {
321 len = FFMAX(p - names, namelen);
322 if (!av_strncasecmp(name, names, len))
326 return !av_strcasecmp(name, names);
329 int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
332 const uint8_t *p = *bufp;
335 int ret = 0, tail_len;
336 uint32_t overlong_encoding_mins[6] = {
337 0x00000000, 0x00000080, 0x00000800, 0x00010000, 0x00200000, 0x04000000,
345 /* first sequence byte starts with 10, or is 1111-1110 or 1111-1111,
346 which is not admitted */
347 if ((code & 0xc0) == 0x80 || code >= 0xFE) {
348 ret = AVERROR(EILSEQ);
351 top = (code & 128) >> 1;
359 return AVERROR(EILSEQ); /* incomplete sequence */
362 /* we assume the byte to be in the form 10xx-xxxx */
363 tmp = *p++ - 128; /* strip leading 1 */
366 return AVERROR(EILSEQ);
368 code = (code<<6) + tmp;
371 code &= (top << 1) - 1;
373 /* check for overlong encodings */
374 av_assert0(tail_len <= 5);
375 if (code < overlong_encoding_mins[tail_len]) {
376 ret = AVERROR(EILSEQ);
381 ret = AVERROR(EILSEQ); /* out-of-range value */
387 if (code > 0x10FFFF &&
388 !(flags & AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES))
389 ret = AVERROR(EILSEQ);
390 if (code < 0x20 && code != 0x9 && code != 0xA && code != 0xD &&
391 flags & AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES)
392 ret = AVERROR(EILSEQ);
393 if (code >= 0xD800 && code <= 0xDFFF &&
394 !(flags & AV_UTF8_FLAG_ACCEPT_SURROGATES))
395 ret = AVERROR(EILSEQ);
396 if ((code == 0xFFFE || code == 0xFFFF) &&
397 !(flags & AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS))
398 ret = AVERROR(EILSEQ);
405 int av_match_list(const char *name, const char *list, char separator)
414 while (*p != '\0' && *p != separator && q - ext1 < sizeof(ext1) - 1)
417 if (!av_strcasecmp(ext1, name))
431 static const char * const strings[] = {
447 "'foo : ' :blahblah",
453 " foo bar : blahblah",
455 "'foo : \\ \\ ' : blahblah",
456 "'\\fo\\o:': blahblah",
457 "\\'fo\\o\\:': foo ' :blahblah"
460 printf("Testing av_get_token()\n");
461 for (i = 0; i < FF_ARRAY_ELEMS(strings); i++) {
462 const char *p = strings[i];
465 q = av_get_token(&p, ":");
466 printf(" -> |%s|", q);
467 printf(" + |%s|\n", p);