JMA Support.

zsnes/src/jma/jma.h

@@ -0,0 +1,88 @@
+/*
+Copyright (C) 2004 NSRT Team ( http://nsrt.edgeemu.com )
+
+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, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef JMA_H
+#define JMA_H
+
+#include <string>
+#include <fstream>
+#include <vector>
+#include <time.h>
+
+namespace JMA
+{
+  enum jma_errors { JMA_NO_CREATE, JMA_NO_MEM_ALLOC, JMA_NO_OPEN, JMA_BAD_FILE, 
+                    JMA_UNSUPPORTED_VERSION, JMA_COMPRESS_FAILED, JMA_DECOMPRESS_FAILED,
+                    JMA_FILE_NOT_FOUND };
+  
+  struct jma_file_info_base
+  {
+    std::string name;
+    std::string comment;
+    size_t size;
+    unsigned int crc32;
+  };
+                    
+  struct jma_public_file_info : jma_file_info_base
+  {
+    time_t datetime;
+  };
+  
+  struct jma_file_info : jma_file_info_base
+  {
+    unsigned int date;
+    unsigned int time;
+    const unsigned char *buffer;
+  };
+
+  template<class jma_file_type>
+  inline size_t get_total_size(std::vector<jma_file_type>& files)
+  {
+    size_t size = 0;
+    for (typename std::vector<jma_file_type>::iterator i = files.begin(); i != files.end(); i++)
+    {
+      size += i->size; //We do have a problem if this wraps around
+    }
+  
+    return(size);
+  }
+
+  class jma_open
+  {
+    public:
+    jma_open(const char *) throw(jma_errors);
+    ~jma_open();
+    
+    std::vector<jma_public_file_info> get_files_info();
+    std::vector<unsigned char *> get_all_files(unsigned char *) throw(jma_errors);
+    void extract_file(std::string& name, unsigned char *) throw(jma_errors);
+    
+    private:
+    std::ifstream stream;
+    std::vector<jma_file_info> files;
+    size_t chunk_size;
+    unsigned char *decompressed_buffer;
+    unsigned char *compressed_buffer;
+  
+    void chunk_seek(unsigned int) throw(jma_errors);
+    void retrieve_file_block() throw(jma_errors);
+  };
+  
+}
+#endif