/src/vlc/contrib/contrib-build/bpg/libavutil/avstring.h

Source
/*
 * Copyright (c) 2007 Mans Rullgard
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVUTIL_AVSTRING_H
#define AVUTIL_AVSTRING_H

#include <stddef.h>
#include <stdint.h>
#include "attributes.h"

/**
 * @addtogroup lavu_string
 * @{
 */

/**
 * Return non-zero if pfx is a prefix of str. If it is, *ptr is set to
 * the address of the first character in str after the prefix.
 *
 * @param str input string
 * @param pfx prefix to test
 * @param ptr updated if the prefix is matched inside str
 * @return non-zero if the prefix matches, zero otherwise
 */
int av_strstart(const char *str, const char *pfx, const char **ptr);

/**
 * Return non-zero if pfx is a prefix of str independent of case. If
 * it is, *ptr is set to the address of the first character in str
 * after the prefix.
 *
 * @param str input string
 * @param pfx prefix to test
 * @param ptr updated if the prefix is matched inside str
 * @return non-zero if the prefix matches, zero otherwise
 */
int av_stristart(const char *str, const char *pfx, const char **ptr);

/**
 * Locate the first case-independent occurrence in the string haystack
 * of the string needle.  A zero-length string needle is considered to
 * match at the start of haystack.
 *
 * This function is a case-insensitive version of the standard strstr().
 *
 * @param haystack string to search in
 * @param needle   string to search for
 * @return         pointer to the located match within haystack
 *                 or a null pointer if no match
 */
char *av_stristr(const char *haystack, const char *needle);

/**
 * Locate the first occurrence of the string needle in the string haystack
 * where not more than hay_length characters are searched. A zero-length
 * string needle is considered to match at the start of haystack.
 *
 * This function is a length-limited version of the standard strstr().
 *
 * @param haystack   string to search in
 * @param needle     string to search for
 * @param hay_length length of string to search in
 * @return           pointer to the located match within haystack
 *                   or a null pointer if no match
 */
char *av_strnstr(const char *haystack, const char *needle, size_t hay_length);

/**
 * Copy the string src to dst, but no more than size - 1 bytes, and
 * null-terminate dst.
 *
 * This function is the same as BSD strlcpy().
 *
 * @param dst destination buffer
 * @param src source string
 * @param size size of destination buffer
 * @return the length of src
 *
 * @warning since the return value is the length of src, src absolutely
 * _must_ be a properly 0-terminated string, otherwise this will read beyond
 * the end of the buffer and possibly crash.
 */
size_t av_strlcpy(char *dst, const char *src, size_t size);

/**
 * Append the string src to the string dst, but to a total length of
 * no more than size - 1 bytes, and null-terminate dst.
 *
 * This function is similar to BSD strlcat(), but differs when
 * size <= strlen(dst).
 *
 * @param dst destination buffer
 * @param src source string
 * @param size size of destination buffer
 * @return the total length of src and dst
 *
 * @warning since the return value use the length of src and dst, these
 * absolutely _must_ be a properly 0-terminated strings, otherwise this
 * will read beyond the end of the buffer and possibly crash.
 */
size_t av_strlcat(char *dst, const char *src, size_t size);

/**
 * Append output to a string, according to a format. Never write out of
 * the destination buffer, and always put a terminating 0 within
 * the buffer.
 * @param dst destination buffer (string to which the output is
 *  appended)
 * @param size total size of the destination buffer
 * @param fmt printf-compatible format string, specifying how the
 *  following parameters are used
 * @return the length of the string that would have been generated
 *  if enough space had been available
 */
size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) av_printf_format(3, 4);

/**
 * Get the count of continuous non zero chars starting from the beginning.
 *
 * @param len maximum number of characters to check in the string, that
 *            is the maximum value which is returned by the function
 */
static inline size_t av_strnlen(const char *s, size_t len)
{
    size_t i;
    for (i = 0; i < len && s[i]; i++)
        ;
    return i;
}

/**
 * Print arguments following specified format into a large enough auto
 * allocated buffer. It is similar to GNU asprintf().
 * @param fmt printf-compatible format string, specifying how the
 *            following parameters are used.
 * @return the allocated string
 * @note You have to free the string yourself with av_free().
 */
char *av_asprintf(const char *fmt, ...) av_printf_format(1, 2);

/**
 * Convert a number to a av_malloced string.
 */
char *av_d2str(double d);

/**
 * Unescape the given string until a non escaped terminating char,
 * and return the token corresponding to the unescaped string.
 *
 * The normal \ and ' escaping is supported. Leading and trailing
 * whitespaces are removed, unless they are escaped with '\' or are
 * enclosed between ''.
 *
 * @param buf the buffer to parse, buf will be updated to point to the
 * terminating char
 * @param term a 0-terminated list of terminating chars
 * @return the malloced unescaped string, which must be av_freed by
 * the user, NULL in case of allocation failure
 */
char *av_get_token(const char **buf, const char *term);

/**
 * Split the string into several tokens which can be accessed by
 * successive calls to av_strtok().
 *
 * A token is defined as a sequence of characters not belonging to the
 * set specified in delim.
 *
 * On the first call to av_strtok(), s should point to the string to
 * parse, and the value of saveptr is ignored. In subsequent calls, s
 * should be NULL, and saveptr should be unchanged since the previous
 * call.
 *
 * This function is similar to strtok_r() defined in POSIX.1.
 *
 * @param s the string to parse, may be NULL
 * @param delim 0-terminated list of token delimiters, must be non-NULL
 * @param saveptr user-provided pointer which points to stored
 * information necessary for av_strtok() to continue scanning the same
 * string. saveptr is updated to point to the next character after the
 * first delimiter found, or to NULL if the string was terminated
 * @return the found token, or NULL when no token is found
 */
char *av_strtok(char *s, const char *delim, char **saveptr);

/**
 * Locale-independent conversion of ASCII isdigit.
 */
av_const int av_isdigit(int c);

/**
 * Locale-independent conversion of ASCII isgraph.
 */
av_const int av_isgraph(int c);

/**
 * Locale-independent conversion of ASCII isspace.
 */
av_const int av_isspace(int c);

/**
 * Locale-independent conversion of ASCII characters to uppercase.
 */
static inline av_const int av_toupper(int c)
{
    if (c >= 'a' && c <= 'z')
        c ^= 0x20;
    return c;
}

/**
 * Locale-independent conversion of ASCII characters to lowercase.
 */
static inline av_const int av_tolower(int c)
{
    if (c >= 'A' && c <= 'Z')
        c ^= 0x20;
    return c;
}

/**
 * Locale-independent conversion of ASCII isxdigit.
 */
av_const int av_isxdigit(int c);

/**
 * Locale-independent case-insensitive compare.
 * @note This means only ASCII-range characters are case-insensitive
 */
int av_strcasecmp(const char *a, const char *b);

/**
 * Locale-independent case-insensitive compare.
 * @note This means only ASCII-range characters are case-insensitive
 */
int av_strncasecmp(const char *a, const char *b, size_t n);


/**
 * Thread safe basename.
 * @param path the path, on DOS both \ and / are considered separators.
 * @return pointer to the basename substring.
 */
const char *av_basename(const char *path);

/**
 * Thread safe dirname.
 * @param path the path, on DOS both \ and / are considered separators.
 * @return the path with the separator replaced by the string terminator or ".".
 * @note the function may change the input string.
 */
const char *av_dirname(char *path);

/**
 * Match instances of a name in a comma-separated list of names.
 * @param name  Name to look for.
 * @param names List of names.
 * @return 1 on match, 0 otherwise.
 */
int av_match_name(const char *name, const char *names);

enum AVEscapeMode {
    AV_ESCAPE_MODE_AUTO,      ///< Use auto-selected escaping mode.
    AV_ESCAPE_MODE_BACKSLASH, ///< Use backslash escaping.
    AV_ESCAPE_MODE_QUOTE,     ///< Use single-quote escaping.
};

/**
 * Consider spaces special and escape them even in the middle of the
 * string.
 *
 * This is equivalent to adding the whitespace characters to the special
 * characters lists, except it is guaranteed to use the exact same list
 * of whitespace characters as the rest of libavutil.
 */
#define AV_ESCAPE_FLAG_WHITESPACE 0x01

/**
 * Escape only specified special characters.
 * Without this flag, escape also any characters that may be considered
 * special by av_get_token(), such as the single quote.
 */
#define AV_ESCAPE_FLAG_STRICT 0x02

/**
 * Escape string in src, and put the escaped string in an allocated
 * string in *dst, which must be freed with av_free().
 *
 * @param dst           pointer where an allocated string is put
 * @param src           string to escape, must be non-NULL
 * @param special_chars string containing the special characters which
 *                      need to be escaped, can be NULL
 * @param mode          escape mode to employ, see AV_ESCAPE_MODE_* macros.
 *                      Any unknown value for mode will be considered equivalent to
 *                      AV_ESCAPE_MODE_BACKSLASH, but this behaviour can change without
 *                      notice.
 * @param flags         flags which control how to escape, see AV_ESCAPE_FLAG_ macros
 * @return the length of the allocated string, or a negative error code in case of error
 * @see av_bprint_escape()
 */
int av_escape(char **dst, const char *src, const char *special_chars,
              enum AVEscapeMode mode, int flags);

#define AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES          1 ///< accept codepoints over 0x10FFFF
#define AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS             2 ///< accept non-characters - 0xFFFE and 0xFFFF
#define AV_UTF8_FLAG_ACCEPT_SURROGATES                 4 ///< accept UTF-16 surrogates codes
#define AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES 8 ///< exclude control codes not accepted by XML

#define AV_UTF8_FLAG_ACCEPT_ALL \
    AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES|AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS|AV_UTF8_FLAG_ACCEPT_SURROGATES

/**
 * Read and decode a single UTF-8 code point (character) from the
 * buffer in *buf, and update *buf to point to the next byte to
 * decode.
 *
 * In case of an invalid byte sequence, the pointer will be updated to
 * the next byte after the invalid sequence and the function will
 * return an error code.
 *
 * Depending on the specified flags, the function will also fail in
 * case the decoded code point does not belong to a valid range.
 *
 * @note For speed-relevant code a carefully implemented use of
 * GET_UTF8() may be preferred.
 *
 * @param codep   pointer used to return the parsed code in case of success.
 *                The value in *codep is set even in case the range check fails.
 * @param bufp    pointer to the address the first byte of the sequence
 *                to decode, updated by the function to point to the
 *                byte next after the decoded sequence
 * @param buf_end pointer to the end of the buffer, points to the next
 *                byte past the last in the buffer. This is used to
 *                avoid buffer overreads (in case of an unfinished
 *                UTF-8 sequence towards the end of the buffer).
 * @param flags   a collection of AV_UTF8_FLAG_* flags
 * @return >= 0 in case a sequence was successfully read, a negative
 * value in case of invalid sequence
 */
int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
                   unsigned int flags);

/**
 * Check if a name is in a list.
 * @returns 0 if not found, or the 1 based index where it has been found in the
 *            list.
 */
int av_match_list(const char *name, const char *list, char separator);

/**
 * @}
 */

#endif /* AVUTIL_AVSTRING_H */

Coverage Report

Created: 2026-07-12 08:57

Line	Count	Source
1		/*
2		* Copyright (c) 2007 Mans Rullgard
3		*
4		* This file is part of FFmpeg.
5		*
6		* FFmpeg is free software; you can redistribute it and/or
7		* modify it under the terms of the GNU Lesser General Public
8		* License as published by the Free Software Foundation; either
9		* version 2.1 of the License, or (at your option) any later version.
10		*
11		* FFmpeg is distributed in the hope that it will be useful,
12		* but WITHOUT ANY WARRANTY; without even the implied warranty of
13		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14		* Lesser General Public License for more details.
15		*
16		* You should have received a copy of the GNU Lesser General Public
17		* License along with FFmpeg; if not, write to the Free Software
18		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19		*/
20
21		#ifndef AVUTIL_AVSTRING_H
22		#define AVUTIL_AVSTRING_H
23
24		#include <stddef.h>
25		#include <stdint.h>
26		#include "attributes.h"
27
28		/**
29		* @addtogroup lavu_string
30		* @{
31		*/
32
33		/**
34		* Return non-zero if pfx is a prefix of str. If it is, *ptr is set to
35		* the address of the first character in str after the prefix.
36		*
37		* @param str input string
38		* @param pfx prefix to test
39		* @param ptr updated if the prefix is matched inside str
40		* @return non-zero if the prefix matches, zero otherwise
41		*/
42		int av_strstart(const char str, const char pfx, const char **ptr);
43
44		/**
45		* Return non-zero if pfx is a prefix of str independent of case. If
46		* it is, *ptr is set to the address of the first character in str
47		* after the prefix.
48		*
49		* @param str input string
50		* @param pfx prefix to test
51		* @param ptr updated if the prefix is matched inside str
52		* @return non-zero if the prefix matches, zero otherwise
53		*/
54		int av_stristart(const char str, const char pfx, const char **ptr);
55
56		/**
57		* Locate the first case-independent occurrence in the string haystack
58		* of the string needle. A zero-length string needle is considered to
59		* match at the start of haystack.
60		*
61		* This function is a case-insensitive version of the standard strstr().
62		*
63		* @param haystack string to search in
64		* @param needle string to search for
65		* @return pointer to the located match within haystack
66		* or a null pointer if no match
67		*/
68		char av_stristr(const char haystack, const char *needle);
69
70		/**
71		* Locate the first occurrence of the string needle in the string haystack
72		* where not more than hay_length characters are searched. A zero-length
73		* string needle is considered to match at the start of haystack.
74		*
75		* This function is a length-limited version of the standard strstr().
76		*
77		* @param haystack string to search in
78		* @param needle string to search for
79		* @param hay_length length of string to search in
80		* @return pointer to the located match within haystack
81		* or a null pointer if no match
82		*/
83		char av_strnstr(const char haystack, const char *needle, size_t hay_length);
84
85		/**
86		* Copy the string src to dst, but no more than size - 1 bytes, and
87		* null-terminate dst.
88		*
89		* This function is the same as BSD strlcpy().
90		*
91		* @param dst destination buffer
92		* @param src source string
93		* @param size size of destination buffer
94		* @return the length of src
95		*
96		* @warning since the return value is the length of src, src absolutely
97		* _must_ be a properly 0-terminated string, otherwise this will read beyond
98		* the end of the buffer and possibly crash.
99		*/
100		size_t av_strlcpy(char dst, const char src, size_t size);
101
102		/**
103		* Append the string src to the string dst, but to a total length of
104		* no more than size - 1 bytes, and null-terminate dst.
105		*
106		* This function is similar to BSD strlcat(), but differs when
107		* size <= strlen(dst).
108		*
109		* @param dst destination buffer
110		* @param src source string
111		* @param size size of destination buffer
112		* @return the total length of src and dst
113		*
114		* @warning since the return value use the length of src and dst, these
115		* absolutely _must_ be a properly 0-terminated strings, otherwise this
116		* will read beyond the end of the buffer and possibly crash.
117		*/
118		size_t av_strlcat(char dst, const char src, size_t size);
119
120		/**
121		* Append output to a string, according to a format. Never write out of
122		* the destination buffer, and always put a terminating 0 within
123		* the buffer.
124		* @param dst destination buffer (string to which the output is
125		* appended)
126		* @param size total size of the destination buffer
127		* @param fmt printf-compatible format string, specifying how the
128		* following parameters are used
129		* @return the length of the string that would have been generated
130		* if enough space had been available
131		*/
132		size_t av_strlcatf(char dst, size_t size, const char fmt, ...) av_printf_format(3, 4);
133
134		/**
135		* Get the count of continuous non zero chars starting from the beginning.
136		*
137		* @param len maximum number of characters to check in the string, that
138		* is the maximum value which is returned by the function
139		*/
140		static inline size_t av_strnlen(const char *s, size_t len)
141	0	{
142	0	size_t i;
143	0	for (i = 0; i < len && s[i]; i++)
144	0	;
145	0	return i;
146	0	} Unexecuted instantiation: utils.c:av_strnlen Unexecuted instantiation: pixdesc.c:av_strnlen
147
148		/**
149		* Print arguments following specified format into a large enough auto
150		* allocated buffer. It is similar to GNU asprintf().
151		* @param fmt printf-compatible format string, specifying how the
152		* following parameters are used.
153		* @return the allocated string
154		* @note You have to free the string yourself with av_free().
155		*/
156		char av_asprintf(const char fmt, ...) av_printf_format(1, 2);
157
158		/**
159		* Convert a number to a av_malloced string.
160		*/
161		char *av_d2str(double d);
162
163		/**
164		* Unescape the given string until a non escaped terminating char,
165		* and return the token corresponding to the unescaped string.
166		*
167		* The normal \ and ' escaping is supported. Leading and trailing
168		* whitespaces are removed, unless they are escaped with '\' or are
169		* enclosed between ''.
170		*
171		* @param buf the buffer to parse, buf will be updated to point to the
172		* terminating char
173		* @param term a 0-terminated list of terminating chars
174		* @return the malloced unescaped string, which must be av_freed by
175		* the user, NULL in case of allocation failure
176		*/
177		char av_get_token(const char buf, const char term);
178
179		/**
180		* Split the string into several tokens which can be accessed by
181		* successive calls to av_strtok().
182		*
183		* A token is defined as a sequence of characters not belonging to the
184		* set specified in delim.
185		*
186		* On the first call to av_strtok(), s should point to the string to
187		* parse, and the value of saveptr is ignored. In subsequent calls, s
188		* should be NULL, and saveptr should be unchanged since the previous
189		* call.
190		*
191		* This function is similar to strtok_r() defined in POSIX.1.
192		*
193		* @param s the string to parse, may be NULL
194		* @param delim 0-terminated list of token delimiters, must be non-NULL
195		* @param saveptr user-provided pointer which points to stored
196		* information necessary for av_strtok() to continue scanning the same
197		* string. saveptr is updated to point to the next character after the
198		* first delimiter found, or to NULL if the string was terminated
199		* @return the found token, or NULL when no token is found
200		*/
201		char av_strtok(char s, const char delim, char *saveptr);
202
203		/**
204		* Locale-independent conversion of ASCII isdigit.
205		*/
206		av_const int av_isdigit(int c);
207
208		/**
209		* Locale-independent conversion of ASCII isgraph.
210		*/
211		av_const int av_isgraph(int c);
212
213		/**
214		* Locale-independent conversion of ASCII isspace.
215		*/
216		av_const int av_isspace(int c);
217
218		/**
219		* Locale-independent conversion of ASCII characters to uppercase.
220		*/
221		static inline av_const int av_toupper(int c)
222	0	{
223	0	if (c >= 'a' && c <= 'z')
224	0	c ^= 0x20;
225	0	return c;
226	0	} Unexecuted instantiation: utils.c:av_toupper Unexecuted instantiation: pixdesc.c:av_toupper
227
228		/**
229		* Locale-independent conversion of ASCII characters to lowercase.
230		*/
231		static inline av_const int av_tolower(int c)
232	0	{
233	0	if (c >= 'A' && c <= 'Z')
234	0	c ^= 0x20;
235	0	return c;
236	0	} Unexecuted instantiation: utils.c:av_tolower Unexecuted instantiation: pixdesc.c:av_tolower
237
238		/**
239		* Locale-independent conversion of ASCII isxdigit.
240		*/
241		av_const int av_isxdigit(int c);
242
243		/**
244		* Locale-independent case-insensitive compare.
245		* @note This means only ASCII-range characters are case-insensitive
246		*/
247		int av_strcasecmp(const char a, const char b);
248
249		/**
250		* Locale-independent case-insensitive compare.
251		* @note This means only ASCII-range characters are case-insensitive
252		*/
253		int av_strncasecmp(const char a, const char b, size_t n);
254
255
256		/**
257		* Thread safe basename.
258		* @param path the path, on DOS both \ and / are considered separators.
259		* @return pointer to the basename substring.
260		*/
261		const char av_basename(const char path);
262
263		/**
264		* Thread safe dirname.
265		* @param path the path, on DOS both \ and / are considered separators.
266		* @return the path with the separator replaced by the string terminator or ".".
267		* @note the function may change the input string.
268		*/
269		const char av_dirname(char path);
270
271		/**
272		* Match instances of a name in a comma-separated list of names.
273		* @param name Name to look for.
274		* @param names List of names.
275		* @return 1 on match, 0 otherwise.
276		*/
277		int av_match_name(const char name, const char names);
278
279		enum AVEscapeMode {
280		AV_ESCAPE_MODE_AUTO, ///< Use auto-selected escaping mode.
281		AV_ESCAPE_MODE_BACKSLASH, ///< Use backslash escaping.
282		AV_ESCAPE_MODE_QUOTE, ///< Use single-quote escaping.
283		};
284
285		/**
286		* Consider spaces special and escape them even in the middle of the
287		* string.
288		*
289		* This is equivalent to adding the whitespace characters to the special
290		* characters lists, except it is guaranteed to use the exact same list
291		* of whitespace characters as the rest of libavutil.
292		*/
293		#define AV_ESCAPE_FLAG_WHITESPACE 0x01
294
295		/**
296		* Escape only specified special characters.
297		* Without this flag, escape also any characters that may be considered
298		* special by av_get_token(), such as the single quote.
299		*/
300		#define AV_ESCAPE_FLAG_STRICT 0x02
301
302		/**
303		* Escape string in src, and put the escaped string in an allocated
304		* string in *dst, which must be freed with av_free().
305		*
306		* @param dst pointer where an allocated string is put
307		* @param src string to escape, must be non-NULL
308		* @param special_chars string containing the special characters which
309		* need to be escaped, can be NULL
310		* @param mode escape mode to employ, see AV_ESCAPE_MODE_* macros.
311		* Any unknown value for mode will be considered equivalent to
312		* AV_ESCAPE_MODE_BACKSLASH, but this behaviour can change without
313		* notice.
314		* @param flags flags which control how to escape, see AV_ESCAPE_FLAG_ macros
315		* @return the length of the allocated string, or a negative error code in case of error
316		* @see av_bprint_escape()
317		*/
318		int av_escape(char *dst, const char src, const char *special_chars,
319		enum AVEscapeMode mode, int flags);
320
321		#define AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES 1 ///< accept codepoints over 0x10FFFF
322		#define AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS 2 ///< accept non-characters - 0xFFFE and 0xFFFF
323		#define AV_UTF8_FLAG_ACCEPT_SURROGATES 4 ///< accept UTF-16 surrogates codes
324		#define AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES 8 ///< exclude control codes not accepted by XML
325
326		#define AV_UTF8_FLAG_ACCEPT_ALL \
327		AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES\|AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS\|AV_UTF8_FLAG_ACCEPT_SURROGATES
328
329		/**
330		* Read and decode a single UTF-8 code point (character) from the
331		* buffer in buf, and update buf to point to the next byte to
332		* decode.
333		*
334		* In case of an invalid byte sequence, the pointer will be updated to
335		* the next byte after the invalid sequence and the function will
336		* return an error code.
337		*
338		* Depending on the specified flags, the function will also fail in
339		* case the decoded code point does not belong to a valid range.
340		*
341		* @note For speed-relevant code a carefully implemented use of
342		* GET_UTF8() may be preferred.
343		*
344		* @param codep pointer used to return the parsed code in case of success.
345		* The value in *codep is set even in case the range check fails.
346		* @param bufp pointer to the address the first byte of the sequence
347		* to decode, updated by the function to point to the
348		* byte next after the decoded sequence
349		* @param buf_end pointer to the end of the buffer, points to the next
350		* byte past the last in the buffer. This is used to
351		* avoid buffer overreads (in case of an unfinished
352		* UTF-8 sequence towards the end of the buffer).
353		* @param flags a collection of AV_UTF8_FLAG_* flags
354		* @return >= 0 in case a sequence was successfully read, a negative
355		* value in case of invalid sequence
356		*/
357		int av_utf8_decode(int32_t codep, const uint8_t bufp, const uint8_t buf_end,
358		unsigned int flags);
359
360		/**
361		* Check if a name is in a list.
362		* @returns 0 if not found, or the 1 based index where it has been found in the
363		* list.
364		*/
365		int av_match_list(const char name, const char list, char separator);
366
367		/**
368		* @}
369		*/
370
371		#endif /* AVUTIL_AVSTRING_H */