summaryrefslogtreecommitdiffstats
path: root/media/ffvpx/libavutil/avstring.c
diff options
context:
space:
mode:
Diffstat (limited to 'media/ffvpx/libavutil/avstring.c')
-rw-r--r--media/ffvpx/libavutil/avstring.c463
1 files changed, 463 insertions, 0 deletions
diff --git a/media/ffvpx/libavutil/avstring.c b/media/ffvpx/libavutil/avstring.c
new file mode 100644
index 0000000000..e460b5be7f
--- /dev/null
+++ b/media/ffvpx/libavutil/avstring.c
@@ -0,0 +1,463 @@
+/*
+ * 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"
+#include "version.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_malloc(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;
+
+ return 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;
+ int 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);
+ q += !!q;
+ }
+ p = strchr(p, separator);
+ p += !!p;
+ }
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 13:51:13 +0000