/src/ffmpeg/libavutil/avstring.c

Source
/*
 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
 * 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
 */

#include <limits.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

#include "config.h"
#include "mem.h"
#include "avassert.h"
#include "avstring.h"
#include "bprint.h"
#include "error.h"
#include "macros.h"

int av_strstart(const char *str, const char *pfx, const char **ptr)
{
    while (*pfx && *pfx == *str) {
        pfx++;
        str++;
    }
    if (!*pfx && ptr)
        *ptr = str;
    return !*pfx;
}

int av_stristart(const char *str, const char *pfx, const char **ptr)
{
    while (*pfx && av_toupper((unsigned)*pfx) == av_toupper((unsigned)*str)) {
        pfx++;
        str++;
    }
    if (!*pfx && ptr)
        *ptr = str;
    return !*pfx;
}

char *av_stristr(const char *s1, const char *s2)
{
    if (!*s2)
        return (char*)(intptr_t)s1;

    do
        if (av_stristart(s1, s2, NULL))
            return (char*)(intptr_t)s1;
    while (*s1++);

    return NULL;
}

char *av_strnstr(const char *haystack, const char *needle, size_t hay_length)
{
    size_t needle_len = strlen(needle);
    if (!needle_len)
        return (char*)haystack;
    while (hay_length >= needle_len) {
        hay_length--;
        if (!memcmp(haystack, needle, needle_len))
            return (char*)haystack;
        haystack++;
    }
    return NULL;
}

size_t av_strlcpy(char *dst, const char *src, size_t size)
{
    size_t len = 0;
    while (++len < size && *src)
        *dst++ = *src++;
    if (len <= size)
        *dst = 0;
    return len + strlen(src) - 1;
}

size_t av_strlcat(char *dst, const char *src, size_t size)
{
    size_t len = strlen(dst);
    if (size <= len + 1)
        return len + strlen(src);
    return len + av_strlcpy(dst + len, src, size - len);
}

size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
{
    size_t len = strlen(dst);
    va_list vl;

    va_start(vl, fmt);
    len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);
    va_end(vl);

    return len;
}

char *av_asprintf(const char *fmt, ...)
{
    char *p = NULL;
    va_list va;
    int len;

    va_start(va, fmt);
    len = vsnprintf(NULL, 0, fmt, va);
    va_end(va);
    if (len < 0)
        goto end;

    p = av_malloc(len + 1);
    if (!p)
        goto end;

    va_start(va, fmt);
    len = vsnprintf(p, len + 1, fmt, va);
    va_end(va);
    if (len < 0)
        av_freep(&p);

end:
    return p;
}

#define WHITESPACES " \n\t\r"

char *av_get_token(const char **buf, const char *term)
{
    char *out     = av_realloc(NULL, strlen(*buf) + 1);
    char *ret     = out, *end = out;
    const char *p = *buf;
    if (!out)
        return NULL;
    p += strspn(p, WHITESPACES);

    while (*p && !strspn(p, term)) {
        char c = *p++;
        if (c == '\\' && *p) {
            *out++ = *p++;
            end    = out;
        } else if (c == '\'') {
            while (*p && *p != '\'')
                *out++ = *p++;
            if (*p) {
                p++;
                end = out;
            }
        } else {
            *out++ = c;
        }
    }

    do
        *out-- = 0;
    while (out >= end && strspn(out, WHITESPACES));

    *buf = p;

    char *small_ret = av_realloc(ret, out - ret + 2);
    return small_ret ? small_ret : ret;
}

char *av_strtok(char *s, const char *delim, char **saveptr)
{
    char *tok;

    if (!s && !(s = *saveptr))
        return NULL;

    /* skip leading delimiters */
    s += strspn(s, delim);

    /* s now points to the first non delimiter char, or to the end of the string */
    if (!*s) {
        *saveptr = NULL;
        return NULL;
    }
    tok = s++;

    /* skip non delimiters */
    s += strcspn(s, delim);
    if (*s) {
        *s = 0;
        *saveptr = s+1;
    } else {
        *saveptr = NULL;
    }

    return tok;
}

int av_strcasecmp(const char *a, const char *b)
{
    uint8_t c1, c2;
    do {
        c1 = av_tolower(*a++);
        c2 = av_tolower(*b++);
    } while (c1 && c1 == c2);
    return c1 - c2;
}

int av_strncasecmp(const char *a, const char *b, size_t n)
{
    uint8_t c1, c2;
    if (n <= 0)
        return 0;
    do {
        c1 = av_tolower(*a++);
        c2 = av_tolower(*b++);
    } while (--n && c1 && c1 == c2);
    return c1 - c2;
}

char *av_strireplace(const char *str, const char *from, const char *to)
{
    char *ret = NULL;
    const char *pstr2, *pstr = str;
    size_t tolen = strlen(to), fromlen = strlen(from);
    AVBPrint pbuf;

    av_bprint_init(&pbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
    while ((pstr2 = av_stristr(pstr, from))) {
        av_bprint_append_data(&pbuf, pstr, pstr2 - pstr);
        pstr = pstr2 + fromlen;
        av_bprint_append_data(&pbuf, to, tolen);
    }
    av_bprint_append_data(&pbuf, pstr, strlen(pstr));
    if (!av_bprint_is_complete(&pbuf)) {
        av_bprint_finalize(&pbuf, NULL);
    } else {
        av_bprint_finalize(&pbuf, &ret);
    }

    return ret;
}

const char *av_basename(const char *path)
{
    char *p;
#if HAVE_DOS_PATHS
    char *q, *d;
#endif

    if (!path || *path == '\0')
        return ".";

    p = strrchr(path, '/');
#if HAVE_DOS_PATHS
    q = strrchr(path, '\\');
    d = strchr(path, ':');
    p = FFMAX3(p, q, d);
#endif

    if (!p)
        return path;

    return p + 1;
}

const char *av_dirname(char *path)
{
    char *p = path ? strrchr(path, '/') : NULL;

#if HAVE_DOS_PATHS
    char *q = path ? strrchr(path, '\\') : NULL;
    char *d = path ? strchr(path, ':')  : NULL;

    d = d ? d + 1 : d;

    p = FFMAX3(p, q, d);
#endif

    if (!p)
        return ".";

    *p = '\0';

    return path;
}

char *av_append_path_component(const char *path, const char *component)
{
    size_t p_len, c_len;
    char *fullpath;

    if (!path)
        return av_strdup(component);
    if (!component)
        return av_strdup(path);

    p_len = strlen(path);
    c_len = strlen(component);
    if (p_len > SIZE_MAX - c_len || p_len + c_len > SIZE_MAX - 2)
        return NULL;
    fullpath = av_malloc(p_len + c_len + 2);
    if (fullpath) {
        if (p_len) {
            av_strlcpy(fullpath, path, p_len + 1);
            if (c_len) {
                if (fullpath[p_len - 1] != '/' && component[0] != '/')
                    fullpath[p_len++] = '/';
                else if (fullpath[p_len - 1] == '/' && component[0] == '/')
                    p_len--;
            }
        }
        av_strlcpy(&fullpath[p_len], component, c_len + 1);
        fullpath[p_len + c_len] = 0;
    }
    return fullpath;
}

int av_escape(char **dst, const char *src, const char *special_chars,
              enum AVEscapeMode mode, int flags)
{
    AVBPrint dstbuf;
    int ret;

    av_bprint_init(&dstbuf, 1, INT_MAX); /* (int)dstbuf.len must be >= 0 */
    av_bprint_escape(&dstbuf, src, special_chars, mode, flags);

    if (!av_bprint_is_complete(&dstbuf)) {
        av_bprint_finalize(&dstbuf, NULL);
        return AVERROR(ENOMEM);
    }
    if ((ret = av_bprint_finalize(&dstbuf, dst)) < 0)
        return ret;
    return dstbuf.len;
}

int av_match_name(const char *name, const char *names)
{
    const char *p;
    size_t len, namelen;

    if (!name || !names)
        return 0;

    namelen = strlen(name);
    while (*names) {
        int negate = '-' == *names;
        p = strchr(names, ',');
        if (!p)
            p = names + strlen(names);
        names += negate;
        len = FFMAX(p - names, namelen);
        if (!av_strncasecmp(name, names, len) || !strncmp("ALL", names, FFMAX(3, p - names)))
            return !negate;
        names = p + (*p == ',');
    }
    return 0;
}

int av_utf8_decode(int32_t *codep, const uint8_t **bufp, const uint8_t *buf_end,
                   unsigned int flags)
{
    const uint8_t *p = *bufp;
    uint32_t top;
    uint64_t code;
    int ret = 0, tail_len;
    uint32_t overlong_encoding_mins[6] = {
        0x00000000, 0x00000080, 0x00000800, 0x00010000, 0x00200000, 0x04000000,
    };

    if (p >= buf_end)
        return 0;

    code = *p++;

    /* first sequence byte starts with 10, or is 1111-1110 or 1111-1111,
       which is not admitted */
    if ((code & 0xc0) == 0x80 || code >= 0xFE) {
        ret = AVERROR(EILSEQ);
        goto end;
    }
    top = (code & 128) >> 1;

    tail_len = 0;
    while (code & top) {
        int tmp;
        tail_len++;
        if (p >= buf_end) {
            (*bufp) ++;
            return AVERROR(EILSEQ); /* incomplete sequence */
        }

        /* we assume the byte to be in the form 10xx-xxxx */
        tmp = *p++ - 128;   /* strip leading 1 */
        if (tmp>>6) {
            (*bufp) ++;
            return AVERROR(EILSEQ);
        }
        code = (code<<6) + tmp;
        top <<= 5;
    }
    code &= (top << 1) - 1;

    /* check for overlong encodings */
    av_assert0(tail_len <= 5);
    if (code < overlong_encoding_mins[tail_len]) {
        ret = AVERROR(EILSEQ);
        goto end;
    }

    if (code >= 1U<<31) {
        ret = AVERROR(EILSEQ);  /* out-of-range value */
        goto end;
    }

    *codep = code;

    if (code > 0x10FFFF &&
        !(flags & AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES))
        ret = AVERROR(EILSEQ);
    if (code < 0x20 && code != 0x9 && code != 0xA && code != 0xD &&
        flags & AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES)
        ret = AVERROR(EILSEQ);
    if (code >= 0xD800 && code <= 0xDFFF &&
        !(flags & AV_UTF8_FLAG_ACCEPT_SURROGATES))
        ret = AVERROR(EILSEQ);
    if ((code == 0xFFFE || code == 0xFFFF) &&
        !(flags & AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS))
        ret = AVERROR(EILSEQ);

end:
    *bufp = p;
    return ret;
}

int av_match_list(const char *name, const char *list, char separator)
{
    const char *p, *q;

    for (p = name; p && *p; ) {
        for (q = list; q && *q; ) {
            int k;
            for (k = 0; p[k] == q[k] || (p[k]*q[k] == 0 && p[k]+q[k] == separator); k++)
                if (k && (!p[k] || p[k] == separator))
                    return 1;
            q = strchr(q, separator);
            if(q)
                q++;
        }
        p = strchr(p, separator);
        if (p)
            p++;
    }

    return 0;
}

Coverage Report

Created: 2026-01-25 07:18

Line	Count	Source
1		/*
2		* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
3		* Copyright (c) 2007 Mans Rullgard
4		*
5		* This file is part of FFmpeg.
6		*
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.
11		*
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.
16		*
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
20		*/
21
22		#include <limits.h>
23		#include <stdarg.h>
24		#include <stdint.h>
25		#include <stdio.h>
26		#include <string.h>
27
28		#include "config.h"
29		#include "mem.h"
30		#include "avassert.h"
31		#include "avstring.h"
32		#include "bprint.h"
33		#include "error.h"
34		#include "macros.h"
35
36		int av_strstart(const char str, const char pfx, const char **ptr)
37	4.09k	{
38	4.09k	while (pfx && pfx == *str) {
39	0	pfx++;
40	0	str++;
41	0	}
42	4.09k	if (!*pfx && ptr)
43	0	*ptr = str;
44	4.09k	return !*pfx;
45	4.09k	}
46
47		int av_stristart(const char str, const char pfx, const char **ptr)
48	0	{
49	0	while (pfx && av_toupper((unsigned)pfx) == av_toupper((unsigned)*str)) {
50	0	pfx++;
51	0	str++;
52	0	}
53	0	if (!*pfx && ptr)
54	0	*ptr = str;
55	0	return !*pfx;
56	0	}
57
58		char av_stristr(const char s1, const char *s2)
59	0	{
60	0	if (!*s2)
61	0	return (char*)(intptr_t)s1;
62
63	0	do
64	0	if (av_stristart(s1, s2, NULL))
65	0	return (char*)(intptr_t)s1;
66	0	while (*s1++);
67
68	0	return NULL;
69	0	}
70
71		char av_strnstr(const char haystack, const char *needle, size_t hay_length)
72	0	{
73	0	size_t needle_len = strlen(needle);
74	0	if (!needle_len)
75	0	return (char*)haystack;
76	0	while (hay_length >= needle_len) {
77	0	hay_length--;
78	0	if (!memcmp(haystack, needle, needle_len))
79	0	return (char*)haystack;
80	0	haystack++;
81	0	}
82	0	return NULL;
83	0	}
84
85		size_t av_strlcpy(char dst, const char src, size_t size)
86	1.36k	{
87	1.36k	size_t len = 0;
88	6.82k	while (++len < size && *src)
89	5.45k	dst++ = src++;
90	1.36k	if (len <= size)
91	1.36k	*dst = 0;
92	1.36k	return len + strlen(src) - 1;
93	1.36k	}
94
95		size_t av_strlcat(char dst, const char src, size_t size)
96	0	{
97	0	size_t len = strlen(dst);
98	0	if (size <= len + 1)
99	0	return len + strlen(src);
100	0	return len + av_strlcpy(dst + len, src, size - len);
101	0	}
102
103		size_t av_strlcatf(char dst, size_t size, const char fmt, ...)
104	0	{
105	0	size_t len = strlen(dst);
106	0	va_list vl;
107
108	0	va_start(vl, fmt);
109	0	len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);
110	0	va_end(vl);
111
112	0	return len;
113	0	}
114
115		char av_asprintf(const char fmt, ...)
116	0	{
117	0	char *p = NULL;
118	0	va_list va;
119	0	int len;
120
121	0	va_start(va, fmt);
122	0	len = vsnprintf(NULL, 0, fmt, va);
123	0	va_end(va);
124	0	if (len < 0)
125	0	goto end;
126
127	0	p = av_malloc(len + 1);
128	0	if (!p)
129	0	goto end;
130
131	0	va_start(va, fmt);
132	0	len = vsnprintf(p, len + 1, fmt, va);
133	0	va_end(va);
134	0	if (len < 0)
135	0	av_freep(&p);
136
137	0	end:
138	0	return p;
139	0	}
140
141	0	#define WHITESPACES " \n\t\r"
142
143		char av_get_token(const char buf, const char term)
144	0	{
145	0	char out = av_realloc(NULL, strlen(buf) + 1);
146	0	char ret = out, end = out;
147	0	const char p = buf;
148	0	if (!out)
149	0	return NULL;
150	0	p += strspn(p, WHITESPACES);
151
152	0	while (*p && !strspn(p, term)) {
153	0	char c = *p++;
154	0	if (c == '\\' && *p) {
155	0	out++ = p++;
156	0	end = out;
157	0	} else if (c == '\'') {
158	0	while (p && p != '\'')
159	0	out++ = p++;
160	0	if (*p) {
161	0	p++;
162	0	end = out;
163	0	}
164	0	} else {
165	0	*out++ = c;
166	0	}
167	0	}
168
169	0	do
170	0	*out-- = 0;
171	0	while (out >= end && strspn(out, WHITESPACES));
172
173	0	*buf = p;
174
175	0	char *small_ret = av_realloc(ret, out - ret + 2);
176	0	return small_ret ? small_ret : ret;
177	0	}
178
179		char av_strtok(char s, const char delim, char *saveptr)
180	0	{
181	0	char *tok;
182
183	0	if (!s && !(s = *saveptr))
184	0	return NULL;
185
186		/* skip leading delimiters */
187	0	s += strspn(s, delim);
188
189		/* s now points to the first non delimiter char, or to the end of the string */
190	0	if (!*s) {
191	0	*saveptr = NULL;
192	0	return NULL;
193	0	}
194	0	tok = s++;
195
196		/* skip non delimiters */
197	0	s += strcspn(s, delim);
198	0	if (*s) {
199	0	*s = 0;
200	0	*saveptr = s+1;
201	0	} else {
202	0	*saveptr = NULL;
203	0	}
204
205	0	return tok;
206	0	}
207
208		int av_strcasecmp(const char a, const char b)
209	0	{
210	0	uint8_t c1, c2;
211	0	do {
212	0	c1 = av_tolower(*a++);
213	0	c2 = av_tolower(*b++);
214	0	} while (c1 && c1 == c2);
215	0	return c1 - c2;
216	0	}
217
218		int av_strncasecmp(const char a, const char b, size_t n)
219	0	{
220	0	uint8_t c1, c2;
221	0	if (n <= 0)
222	0	return 0;
223	0	do {
224	0	c1 = av_tolower(*a++);
225	0	c2 = av_tolower(*b++);
226	0	} while (--n && c1 && c1 == c2);
227	0	return c1 - c2;
228	0	}
229
230		char av_strireplace(const char str, const char from, const char to)
231	0	{
232	0	char *ret = NULL;
233	0	const char pstr2, pstr = str;
234	0	size_t tolen = strlen(to), fromlen = strlen(from);
235	0	AVBPrint pbuf;
236
237	0	av_bprint_init(&pbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
238	0	while ((pstr2 = av_stristr(pstr, from))) {
239	0	av_bprint_append_data(&pbuf, pstr, pstr2 - pstr);
240	0	pstr = pstr2 + fromlen;
241	0	av_bprint_append_data(&pbuf, to, tolen);
242	0	}
243	0	av_bprint_append_data(&pbuf, pstr, strlen(pstr));
244	0	if (!av_bprint_is_complete(&pbuf)) {
245	0	av_bprint_finalize(&pbuf, NULL);
246	0	} else {
247	0	av_bprint_finalize(&pbuf, &ret);
248	0	}
249
250	0	return ret;
251	0	}
252
253		const char av_basename(const char path)
254	0	{
255	0	char *p;
256		#if HAVE_DOS_PATHS
257		char q, d;
258		#endif
259
260	0	if (!path \|\| *path == '\0')
261	0	return ".";
262
263	0	p = strrchr(path, '/');
264		#if HAVE_DOS_PATHS
265		q = strrchr(path, '\\');
266		d = strchr(path, ':');
267		p = FFMAX3(p, q, d);
268		#endif
269
270	0	if (!p)
271	0	return path;
272
273	0	return p + 1;
274	0	}
275
276		const char av_dirname(char path)
277	0	{
278	0	char *p = path ? strrchr(path, '/') : NULL;
279
280		#if HAVE_DOS_PATHS
281		char *q = path ? strrchr(path, '\\') : NULL;
282		char *d = path ? strchr(path, ':') : NULL;
283
284		d = d ? d + 1 : d;
285
286		p = FFMAX3(p, q, d);
287		#endif
288
289	0	if (!p)
290	0	return ".";
291
292	0	*p = '\0';
293
294	0	return path;
295	0	}
296
297		char av_append_path_component(const char path, const char *component)
298	0	{
299	0	size_t p_len, c_len;
300	0	char *fullpath;
301
302	0	if (!path)
303	0	return av_strdup(component);
304	0	if (!component)
305	0	return av_strdup(path);
306
307	0	p_len = strlen(path);
308	0	c_len = strlen(component);
309	0	if (p_len > SIZE_MAX - c_len \|\| p_len + c_len > SIZE_MAX - 2)
310	0	return NULL;
311	0	fullpath = av_malloc(p_len + c_len + 2);
312	0	if (fullpath) {
313	0	if (p_len) {
314	0	av_strlcpy(fullpath, path, p_len + 1);
315	0	if (c_len) {
316	0	if (fullpath[p_len - 1] != '/' && component[0] != '/')
317	0	fullpath[p_len++] = '/';
318	0	else if (fullpath[p_len - 1] == '/' && component[0] == '/')
319	0	p_len--;
320	0	}
321	0	}
322	0	av_strlcpy(&fullpath[p_len], component, c_len + 1);
323	0	fullpath[p_len + c_len] = 0;
324	0	}
325	0	return fullpath;
326	0	}
327
328		int av_escape(char *dst, const char src, const char *special_chars,
329		enum AVEscapeMode mode, int flags)
330	0	{
331	0	AVBPrint dstbuf;
332	0	int ret;
333
334	0	av_bprint_init(&dstbuf, 1, INT_MAX); /* (int)dstbuf.len must be >= 0 */
335	0	av_bprint_escape(&dstbuf, src, special_chars, mode, flags);
336
337	0	if (!av_bprint_is_complete(&dstbuf)) {
338	0	av_bprint_finalize(&dstbuf, NULL);
339	0	return AVERROR(ENOMEM);
340	0	}
341	0	if ((ret = av_bprint_finalize(&dstbuf, dst)) < 0)
342	0	return ret;
343	0	return dstbuf.len;
344	0	}
345
346		int av_match_name(const char name, const char names)
347	0	{
348	0	const char *p;
349	0	size_t len, namelen;
350
351	0	if (!name \|\| !names)
352	0	return 0;
353
354	0	namelen = strlen(name);
355	0	while (*names) {
356	0	int negate = '-' == *names;
357	0	p = strchr(names, ',');
358	0	if (!p)
359	0	p = names + strlen(names);
360	0	names += negate;
361	0	len = FFMAX(p - names, namelen);
362	0	if (!av_strncasecmp(name, names, len) \|\| !strncmp("ALL", names, FFMAX(3, p - names)))
363	0	return !negate;
364	0	names = p + (*p == ',');
365	0	}
366	0	return 0;
367	0	}
368
369		int av_utf8_decode(int32_t codep, const uint8_t bufp, const uint8_t buf_end,
370		unsigned int flags)
371	0	{
372	0	const uint8_t p = bufp;
373	0	uint32_t top;
374	0	uint64_t code;
375	0	int ret = 0, tail_len;
376	0	uint32_t overlong_encoding_mins[6] = {
377	0	0x00000000, 0x00000080, 0x00000800, 0x00010000, 0x00200000, 0x04000000,
378	0	};
379
380	0	if (p >= buf_end)
381	0	return 0;
382
383	0	code = *p++;
384
385		/* first sequence byte starts with 10, or is 1111-1110 or 1111-1111,
386		which is not admitted */
387	0	if ((code & 0xc0) == 0x80 \|\| code >= 0xFE) {
388	0	ret = AVERROR(EILSEQ);
389	0	goto end;
390	0	}
391	0	top = (code & 128) >> 1;
392
393	0	tail_len = 0;
394	0	while (code & top) {
395	0	int tmp;
396	0	tail_len++;
397	0	if (p >= buf_end) {
398	0	(*bufp) ++;
399	0	return AVERROR(EILSEQ); /* incomplete sequence */
400	0	}
401
402		/* we assume the byte to be in the form 10xx-xxxx */
403	0	tmp = p++ - 128; / strip leading 1 */
404	0	if (tmp>>6) {
405	0	(*bufp) ++;
406	0	return AVERROR(EILSEQ);
407	0	}
408	0	code = (code<<6) + tmp;
409	0	top <<= 5;
410	0	}
411	0	code &= (top << 1) - 1;
412
413		/* check for overlong encodings */
414	0	av_assert0(tail_len <= 5);
415	0	if (code < overlong_encoding_mins[tail_len]) {
416	0	ret = AVERROR(EILSEQ);
417	0	goto end;
418	0	}
419
420	0	if (code >= 1U<<31) {
421	0	ret = AVERROR(EILSEQ); /* out-of-range value */
422	0	goto end;
423	0	}
424
425	0	*codep = code;
426
427	0	if (code > 0x10FFFF &&
428	0	!(flags & AV_UTF8_FLAG_ACCEPT_INVALID_BIG_CODES))
429	0	ret = AVERROR(EILSEQ);
430	0	if (code < 0x20 && code != 0x9 && code != 0xA && code != 0xD &&
431	0	flags & AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES)
432	0	ret = AVERROR(EILSEQ);
433	0	if (code >= 0xD800 && code <= 0xDFFF &&
434	0	!(flags & AV_UTF8_FLAG_ACCEPT_SURROGATES))
435	0	ret = AVERROR(EILSEQ);
436	0	if ((code == 0xFFFE \|\| code == 0xFFFF) &&
437	0	!(flags & AV_UTF8_FLAG_ACCEPT_NON_CHARACTERS))
438	0	ret = AVERROR(EILSEQ);
439
440	0	end:
441	0	*bufp = p;
442	0	return ret;
443	0	}
444
445		int av_match_list(const char name, const char list, char separator)
446	0	{
447	0	const char p, q;
448
449	0	for (p = name; p && *p; ) {
450	0	for (q = list; q && *q; ) {
451	0	int k;
452	0	for (k = 0; p[k] == q[k] \|\| (p[k]*q[k] == 0 && p[k]+q[k] == separator); k++)
453	0	if (k && (!p[k] \|\| p[k] == separator))
454	0	return 1;
455	0	q = strchr(q, separator);
456	0	if(q)
457	0	q++;
458	0	}
459	0	p = strchr(p, separator);
460	0	if (p)
461	0	p++;
462	0	}
463
464	0	return 0;
465	0	}