From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 media/libav/libavutil/dict.c | 190 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 190 insertions(+)
 create mode 100644 media/libav/libavutil/dict.c

(limited to 'media/libav/libavutil/dict.c')

diff --git a/media/libav/libavutil/dict.c b/media/libav/libavutil/dict.c
new file mode 100644
index 000000000..e4ea7769e
--- /dev/null
+++ b/media/libav/libavutil/dict.c
@@ -0,0 +1,190 @@
+/*
+ * copyright (c) 2009 Michael Niedermayer
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+
+#include "avstring.h"
+#include "dict.h"
+#include "internal.h"
+#include "mem.h"
+
+struct AVDictionary {
+    int count;
+    AVDictionaryEntry *elems;
+};
+
+int av_dict_count(const AVDictionary *m)
+{
+    return m ? m->count : 0;
+}
+
+AVDictionaryEntry *av_dict_get(const AVDictionary *m, const char *key,
+                               const AVDictionaryEntry *prev, int flags)
+{
+    unsigned int i, j;
+
+    if (!m)
+        return NULL;
+
+    if (prev)
+        i = prev - m->elems + 1;
+    else
+        i = 0;
+
+    for (; i < m->count; i++) {
+        const char *s = m->elems[i].key;
+        if (flags & AV_DICT_MATCH_CASE)
+            for (j = 0; s[j] == key[j] && key[j]; j++)
+                ;
+        else
+            for (j = 0; av_toupper(s[j]) == av_toupper(key[j]) && key[j]; j++)
+                ;
+        if (key[j])
+            continue;
+        if (s[j] && !(flags & AV_DICT_IGNORE_SUFFIX))
+            continue;
+        return &m->elems[i];
+    }
+    return NULL;
+}
+
+int av_dict_set(AVDictionary **pm, const char *key, const char *value,
+                int flags)
+{
+    AVDictionary *m = *pm;
+    AVDictionaryEntry *tag = av_dict_get(m, key, NULL, flags);
+    char *oldval = NULL;
+
+    if (!m)
+        m = *pm = av_mallocz(sizeof(*m));
+
+    if (tag) {
+        if (flags & AV_DICT_DONT_OVERWRITE) {
+            if (flags & AV_DICT_DONT_STRDUP_KEY) av_free(key);
+            if (flags & AV_DICT_DONT_STRDUP_VAL) av_free(value);
+            return 0;
+        }
+        if (flags & AV_DICT_APPEND)
+            oldval = tag->value;
+        else
+            av_free(tag->value);
+        av_free(tag->key);
+        *tag = m->elems[--m->count];
+    } else {
+        AVDictionaryEntry *tmp = av_realloc(m->elems,
+                                            (m->count + 1) * sizeof(*m->elems));
+        if (tmp)
+            m->elems = tmp;
+        else
+            return AVERROR(ENOMEM);
+    }
+    if (value) {
+        if (flags & AV_DICT_DONT_STRDUP_KEY)
+            m->elems[m->count].key = key;
+        else
+            m->elems[m->count].key = av_strdup(key);
+        if (flags & AV_DICT_DONT_STRDUP_VAL) {
+            m->elems[m->count].value = value;
+        } else if (oldval && flags & AV_DICT_APPEND) {
+            int len = strlen(oldval) + strlen(value) + 1;
+            if (!(oldval = av_realloc(oldval, len)))
+                return AVERROR(ENOMEM);
+            av_strlcat(oldval, value, len);
+            m->elems[m->count].value = oldval;
+        } else
+            m->elems[m->count].value = av_strdup(value);
+        m->count++;
+    }
+    if (!m->count) {
+        av_free(m->elems);
+        av_freep(pm);
+    }
+
+    return 0;
+}
+
+static int parse_key_value_pair(AVDictionary **pm, const char **buf,
+                                const char *key_val_sep, const char *pairs_sep,
+                                int flags)
+{
+    char *key = av_get_token(buf, key_val_sep);
+    char *val = NULL;
+    int ret;
+
+    if (key && *key && strspn(*buf, key_val_sep)) {
+        (*buf)++;
+        val = av_get_token(buf, pairs_sep);
+    }
+
+    if (key && *key && val && *val)
+        ret = av_dict_set(pm, key, val, flags);
+    else
+        ret = AVERROR(EINVAL);
+
+    av_freep(&key);
+    av_freep(&val);
+
+    return ret;
+}
+
+int av_dict_parse_string(AVDictionary **pm, const char *str,
+                         const char *key_val_sep, const char *pairs_sep,
+                         int flags)
+{
+    int ret;
+
+    if (!str)
+        return 0;
+
+    /* ignore STRDUP flags */
+    flags &= ~(AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
+
+    while (*str) {
+        if ((ret = parse_key_value_pair(pm, &str, key_val_sep, pairs_sep, flags)) < 0)
+            return ret;
+
+        if (*str)
+            str++;
+    }
+
+    return 0;
+}
+
+void av_dict_free(AVDictionary **pm)
+{
+    AVDictionary *m = *pm;
+
+    if (m) {
+        while (m->count--) {
+            av_free(m->elems[m->count].key);
+            av_free(m->elems[m->count].value);
+        }
+        av_free(m->elems);
+    }
+    av_freep(pm);
+}
+
+void av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
+{
+    AVDictionaryEntry *t = NULL;
+
+    while ((t = av_dict_get(src, "", t, AV_DICT_IGNORE_SUFFIX)))
+        av_dict_set(dst, t->key, t->value, flags);
+}
-- 
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