snes9x/jma/jma.h

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/*
Copyright (C) 2005-2006 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
version 2 as published by the Free Software Foundation.
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 short date;
unsigned short 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:
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jma_open(const char *);
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~jma_open();
std::vector<jma_public_file_info> get_files_info();
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std::vector<unsigned char *> get_all_files(unsigned char *);
void extract_file(std::string& name, unsigned char *);
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bool is_solid();
private:
std::ifstream stream;
std::vector<jma_file_info> files;
size_t chunk_size;
unsigned char *decompressed_buffer;
unsigned char *compressed_buffer;
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void chunk_seek(unsigned int);
void retrieve_file_block();
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};
time_t uint_to_time(unsigned short, unsigned short);
const char *jma_error_text(jma_errors);
}
#endif