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/*
* Copyright (C) Volition, Inc. 1999. All rights reserved.
*
* All source code herein is the property of Volition, Inc. You may not sell
* or otherwise commercially exploit the source or things you created based on the
* source.
*
*/
#ifndef _CFILEARCHIVE_H
#define _CFILEARCHIVE_H
#ifndef _CFILE_INTERNAL
#pragma message("This file should only be included internally in CFILE!!")
#endif
#include "globalincs/pstypes.h"
// The following Cfile_block data is private to cfile.cpp
// DO NOT MOVE the Cfile_block* information to cfile.h / do not extern this data
//
#define CFILE_BLOCK_UNUSED 0
#define CFILE_BLOCK_USED 1
struct COMPRESSION_INFO {
int header = 0;
size_t compressed_size = 0;
int block_size = 0;
int num_offsets = 0;
int* offsets = nullptr;
char* decoder_buffer = nullptr;
int last_decoded_block_pos = 0;
int last_decoded_block_bytes = 0;
};
struct CFILE {
int type = CFILE_BLOCK_UNUSED; // CFILE_BLOCK_UNUSED, CFILE_BLOCK_USED
int dir_type; // directory location
FILE* fp; // File pointer if opening an individual file
const void* data; // Pointer for memory-mapped file access. NULL if not mem-mapped.
bool mem_mapped; // Flag for memory mapped files (if data is not null and this is false it means that it's an embedded file)
#ifdef _WIN32
HANDLE hInFile; // Handle from CreateFile()
HANDLE hMapFile; // Handle from CreateFileMapping()
#else
size_t data_length; // length of data for mmap
#endif
size_t lib_offset;
size_t raw_position;
size_t size; // for packed files
size_t max_read_len; // max read offset, for special error handling
SCP_string original_filename;
const char* source_file;
int line_num;
COMPRESSION_INFO compression_info;
};
#define MAX_CFILE_BLOCKS 64
extern std::array<CFILE, MAX_CFILE_BLOCKS> Cfile_block_list;
// Called once to setup the low-level reading code.
void cf_init_lowlevel_read_code(CFILE* cfile, size_t lib_offset, size_t size, size_t pos);
// This checks if the file is compressed or not, and creates the proper compression info if so.
void cf_check_compression(CFILE* cfile);
// Used to clear compression info data and free dynamic memory used by compression
void cf_clear_compression_info(CFILE* cfile);
#endif
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