Simplify handling of compressed files

ResourceManager will now check for ".gz" and act appropriately (unless told
not to). Compression handling functions are now in new utils/zlib files,
along with a function to load a file from drive, uncompressing it if it ends
in ".gz".

Reviewed-by: Freeyorp

1 files changed, 48 insertions, 0 deletions

diff --git a/src/utils/zlib.h b/src/utils/zlib.h
new file mode 100644
index 00000000..003e64b6
--- /dev/null
+++ b/src/utils/zlib.h
@@ -0,0 +1,48 @@
+/*
+ *  The Mana Client
+ *  Copyright (C) 2007-2009  The Mana World Development Team
+ *  Copyright (C) 2009-2010  The Mana Developers
+ *
+ *  This file is part of The Mana Client.
+ *
+ *  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
+ *  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/>.
+ */
+
+#ifndef UTILS_ZLIB_H
+#define UTILS_ZLIB_H
+
+#include <string>
+
+/**
+ * Inflates either zlib or gzip deflated memory. The inflated memory is
+ * expected to be freed by the caller.
+ */
+int inflateMemory(unsigned char *in, unsigned int inLength,
+                  unsigned char *&out, unsigned int &outLength);
+
+int inflateMemory(unsigned char *in, unsigned int inLength,
+                  unsigned char *&out);
+
+/**
+ * Loads the given file from the filesystem, uncompressing if it ends in ".gz".
+ *
+ * @param filename The name of the file to be loaded and uncompressed
+ * @param filesize The size of the file that was loaded and uncompressed.
+ *
+ * @return An allocated byte array containing the data that was loaded and
+ *         uncompressed, or <code>NULL</code> on fail.
+ */
+void *loadCompressedFile(const std::string &filename, int &filesize);
+
+#endif // UTILS_ZLIB_H