First Commit

For Azeroth!

src/tools/mesh_extractor/Chunk.cpp

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program 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 General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Chunk.h"
+#include "Utils.h"
+
+int32 Chunk::FindSubChunkOffset(std::string name)
+{
+    // Reverse the name
+    name = std::string(name.rbegin(), name.rend());
+    if (name.size() != 4)
+        return -1;
+
+    FILE* stream = GetStream();
+    uint32 matched = 0;
+    while (uint32(ftell(stream)) < Utils::Size(stream))
+    {
+        char b = 0;
+        if (fread(&b, sizeof(char), 1, stream) != 1 || b != name[matched])
+            matched = 0;
+        else
+            ++matched;
+
+        if (matched == 4)
+            return ftell(stream) - 4;
+    }
+    return -1;
+}
+
+FILE* Chunk::GetStream()
+{
+    fseek(Stream, Offset, SEEK_SET);
+    return Stream;
+}