1 files changed, 437 insertions, 0 deletions
diff --git a/media/ffvpx/libavutil/avstring.c b/media/ffvpx/libavutil/avstring.c
new file mode 100644
index 000000000..1787a1ef5
--- /dev/null
+++ b/media/ffvpx/libavutil/avstring.c
@@ -0,0 +1,437 @@
+/*
+ * 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 <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "config.h"
+#include "common.h"
+#include "mem.h"
+#include "avassert.h"
+#include "avstring.h"
+#include "bprint.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;
+}
+
+char *av_d2str(double d)
+{
+    char *str = av_malloc(16);
+    if (str)
+        snprintf(str, 16, "%f", d);
+    return str;
+}
+
+#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)
+{
+    const char *end = a + n;
+    uint8_t c1, c2;
+    do {
+        c1 = av_tolower(*a++);
+        c2 = av_tolower(*b++);
+    } while (a < end && c1 && c1 == c2);
+    return c1 - c2;
+}
+
+const char *av_basename(const char *path)
+{
+    char *p = strrchr(path, '/');
+
+#if HAVE_DOS_PATHS
+    char *q = strrchr(path, '\\');
+    char *d = strchr(path, ':');
+
+    p = FFMAX3(p, q, d);
+#endif
+
+    if (!p)
+        return path;
+
+    return p + 1;
+}
+
+const char *av_dirname(char *path)
+{
+    char *p = strrchr(path, '/');
+
+#if HAVE_DOS_PATHS
+    char *q = strrchr(path, '\\');
+    char *d = strchr(path, ':');
+
+    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;
+
+    av_bprint_init(&dstbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
+    av_bprint_escape(&dstbuf, src, special_chars, mode, flags);
+
+    if (!av_bprint_is_complete(&dstbuf)) {
+        av_bprint_finalize(&dstbuf, NULL);
+        return AVERROR(ENOMEM);
+    } else {
+        av_bprint_finalize(&dstbuf, dst);
+        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;
+}