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 size_t 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 char *av_append_path_component(const char *path, const char *component)
278 return av_strdup(component);
280 return av_strdup(path);
282 p_len = strlen(path);
283 c_len = strlen(component);
284 if (p_len > SIZE_MAX - c_len || p_len + c_len > SIZE_MAX - 2)
286 fullpath = av_malloc(p_len + c_len + 2);
289 av_strlcpy(fullpath, path, p_len + 1);
291 if (fullpath[p_len - 1] != '/' && component[0] != '/')
292 fullpath[p_len++] = '/';
293 else if (fullpath[p_len - 1] == '/' && component[0] == '/')
297 av_strlcpy(&fullpath[p_len], component, c_len + 1);
298 fullpath[p_len + c_len] = 0;
303 int av_escape(char **dst, const char *src, const char *special_chars,
304 enum AVEscapeMode mode, int flags)
308 av_bprint_init(&dstbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
309 av_bprint_escape(&dstbuf, src, special_chars, mode, flags);
311 if (!av_bprint_is_complete(&dstbuf)) {
312 av_bprint_finalize(&dstbuf, NULL);
313 return AVERROR(ENOMEM);
315 av_bprint_finalize(&dstbuf, dst);
320 int av_isdigit(int c)
322 return c >= '0' && c <= '9';
325 int av_isgraph(int c)
327 return c > 32 && c < 127;
330 int av_isspace(int c)
332 return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' ||
336 int av_isxdigit(int c)
339 return av_isdigit(c) || (c >= 'a' && c <= 'f');
342 int av_match_name(const char *name, const char *names)
350 namelen = strlen(name);
351 while ((p = strchr(names, ','))) {
352 len = FFMAX(p - names, namelen);
353 if (!av_strncasecmp(name, names, len))
357 return !av_strcasecmp(name, names);
360 int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
363 const uint8_t *p = *bufp;
366 int ret = 0, tail_len;
367 uint32_t overlong_encoding_mins[6] = {
368 0x00000000, 0x00000080, 0x00000800, 0x00010000, 0x00200000, 0x04000000,
376 /* first sequence byte starts with 10, or is 1111-1110 or 1111-1111,
377 which is not admitted */
378 if ((code & 0xc0) == 0x80 || code >= 0xFE) {
379 ret = AVERROR(EILSEQ);
382 top = (code & 128) >> 1;
390 return AVERROR(EILSEQ); /* incomplete sequence */
393 /* we assume the byte to be in the form 10xx-xxxx */
394 tmp = *p++ - 128; /* strip leading 1 */
397 return AVERROR(EILSEQ);
399 code = (code<<6) + tmp;
402 code &= (top << 1) - 1;
404 /* check for overlong encodings */
405 av_assert0(tail_len <= 5);
406 if (code < overlong_encoding_mins[tail_len]) {
407 ret = AVERROR(EILSEQ);
411 if (code >= 1U<<31) {
412 ret = AVERROR(EILSEQ); /* out-of-range value */
418 if (code > 0x10FFFF &&
419 !(flags & AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES))
420 ret = AVERROR(EILSEQ);
421 if (code < 0x20 && code != 0x9 && code != 0xA && code != 0xD &&
422 flags & AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES)
423 ret = AVERROR(EILSEQ);
424 if (code >= 0xD800 && code <= 0xDFFF &&
425 !(flags & AV_UTF8_FLAG_ACCEPT_SURROGATES))
426 ret = AVERROR(EILSEQ);
427 if ((code == 0xFFFE || code == 0xFFFF) &&
428 !(flags & AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS))
429 ret = AVERROR(EILSEQ);
436 int av_match_list(const char *name, const char *list, char separator)
440 for (p = name; p && *p; ) {
441 for (q = list; q && *q; ) {
443 for (k = 0; p[k] == q[k] || (p[k]*q[k] == 0 && p[k]+q[k] == separator); k++)
444 if (k && (!p[k] || p[k] == separator))
446 q = strchr(q, separator);
449 p = strchr(p, separator);
462 static const char * const strings[] = {
478 "'foo : ' :blahblah",
484 " foo bar : blahblah",
486 "'foo : \\ \\ ' : blahblah",
487 "'\\fo\\o:': blahblah",
488 "\\'fo\\o\\:': foo ' :blahblah"
491 printf("Testing av_get_token()\n");
492 for (i = 0; i < FF_ARRAY_ELEMS(strings); i++) {
493 const char *p = strings[i];
496 q = av_get_token(&p, ":");
497 printf(" -> |%s|", q);
498 printf(" + |%s|\n", p);
502 printf("Testing av_append_path_component()\n");
503 #define TEST_APPEND_PATH_COMPONENT(path, component, expected) \
504 fullpath = av_append_path_component((path), (component)); \
505 printf("%s = %s\n", fullpath ? fullpath : "(null)", expected); \
507 TEST_APPEND_PATH_COMPONENT(NULL, NULL, "(null)")
508 TEST_APPEND_PATH_COMPONENT("path", NULL, "path");
509 TEST_APPEND_PATH_COMPONENT(NULL, "comp", "comp");
510 TEST_APPEND_PATH_COMPONENT("path", "comp", "path/comp");
511 TEST_APPEND_PATH_COMPONENT("path/", "comp", "path/comp");
512 TEST_APPEND_PATH_COMPONENT("path", "/comp", "path/comp");
513 TEST_APPEND_PATH_COMPONENT("path/", "/comp", "path/comp");
514 TEST_APPEND_PATH_COMPONENT("path/path2/", "/comp/comp2", "path/path2/comp/comp2");