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-rw-r--r--md5/media-thumb-hash.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/md5/media-thumb-hash.c b/md5/media-thumb-hash.c
new file mode 100644
index 0000000..bd8df13
--- /dev/null
+++ b/md5/media-thumb-hash.c
@@ -0,0 +1,132 @@
+/* GLIB - Library of useful routines for C programming
+ *
+ * gconvert.c: Convert between character sets using iconv
+ * Copyright Red Hat Inc., 2000
+ * Authors: Havoc Pennington <hp@redhat.com>, Owen Taylor <otaylor@redhat.com
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/* The array below is taken from gconvert.c, which is licensed by GNU Lesser General Public License
+ * Code to escape string is also taken partially from gconvert.c
+ * File name is changed to media-thumb-hash.c
+ */
+
+#include "md5.h"
+#include "media-thumbnail-private.h"
+#include <string.h>
+#include <alloca.h>
+
+
+static const char ACCEPTABLE_URI_CHARS[96] = {
+ /* ! " # $ % & ' ( ) * + , - . / */
+ 0x00, 0x3F, 0x20, 0x20, 0x28, 0x00, 0x2C, 0x3F, 0x3F, 0x3F, 0x3F, 0x2A,
+ 0x28, 0x3F, 0x3F, 0x1C,
+ /* 0 1 2 3 4 5 6 7 8 9 : ; < = > ? */
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x38, 0x20,
+ 0x20, 0x2C, 0x20, 0x20,
+ /* @ A B C D E F G H I J K L M N O */
+ 0x38, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ 0x3F, 0x3F, 0x3F, 0x3F,
+ /* P Q R S T U V W X Y Z [ \ ] ^ _ */
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x20,
+ 0x20, 0x20, 0x20, 0x3F,
+ /* ` a b c d e f g h i j k l m n o */
+ 0x20, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ 0x3F, 0x3F, 0x3F, 0x3F,
+ /* p q r s t u v w x y z { | } ~ DEL */
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x20,
+ 0x20, 0x20, 0x3F, 0x20
+};
+
+char *_media_thumb_generate_hash_name(const char *file)
+{
+ int n;
+ MD5_CTX ctx;
+ static char md5out[(2 * MD5_HASHBYTES) + 1];
+ unsigned char hash[MD5_HASHBYTES];
+ static const char hex[] = "0123456789abcdef";
+
+ char *uri;
+ char *t;
+ const unsigned char *c;
+ int length;
+
+ if (!file) {
+ return NULL;
+ }
+
+ length = 3 * strlen(file) + 9;
+
+ memset(md5out, 0, sizeof(md5out));
+
+#define _check_uri_char(c) \
+((c) >= 32 && (c) < 128 && (ACCEPTABLE_URI_CHARS[(c) - 32] & 0x08))
+
+ uri = alloca(length);
+ if (uri == NULL) {
+ return NULL;
+ }
+
+ strncpy(uri, "file://", length);
+ uri[length - 1] = '\0';
+ t = uri + sizeof("file://") - 1;
+
+ for (c = (const unsigned char *)file; *c != '\0'; c++) {
+ if (!_check_uri_char(*c)) {
+ *t++ = '%';
+ *t++ = hex[*c >> 4];
+ *t++ = hex[*c & 15];
+ } else {
+ *t++ = *c;
+ }
+ }
+ *t = '\0';
+#undef _check_uri_char
+
+ MD5Init(&ctx);
+ MD5Update(&ctx, (unsigned char const *)uri, (unsigned)strlen(uri));
+ MD5Final(hash, &ctx);
+
+ for (n = 0; n < MD5_HASHBYTES; n++) {
+ md5out[2 * n] = hex[hash[n] >> 4];
+ md5out[2 * n + 1] = hex[hash[n] & 0x0f];
+ }
+ md5out[2 * n] = '\0';
+
+ return md5out;
+}
+
+int thumbnail_generate_hash_code(const char *origin_path, char *hash_code, int max_length)
+{
+ char *hash = NULL;
+
+ if (max_length < ((2 * MD5_HASHBYTES) + 1)) {
+ return MEDIA_THUMB_ERROR_INVALID_PARAMETER;
+ }
+
+ hash = _media_thumb_generate_hash_name(origin_path);
+
+ if (hash == NULL) {
+ return MEDIA_THUMB_ERROR_HASHCODE;
+ }
+
+ strncpy(hash_code, hash, max_length);
+ hash_code[strlen(hash_code)] ='\0';
+
+ return MEDIA_THUMB_ERROR_NONE;
+}
+