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// license:BSD-3-Clause
// copyright-holders:Aaron Giles, Vas Crabb
/***************************************************************************
un7z.h
7z file management.
***************************************************************************/
// this is based on unzip.h, with modifications needed to use the 7zip library
#pragma once
#ifndef MAME_LIB_UTIL_UN7Z_H
#define MAME_LIB_UTIL_UN7Z_H
#include "osdcore.h"
#include <cstdint>
#include <memory>
#include <string>
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
// describes an open _7Z file
class _7z_file
{
public:
// Error types
enum class error
{
NONE = 0,
OUT_OF_MEMORY,
FILE_ERROR,
BAD_SIGNATURE,
DECOMPRESS_ERROR,
FILE_TRUNCATED,
FILE_CORRUPT,
UNSUPPORTED,
BUFFER_TOO_SMALL
};
typedef std::unique_ptr<_7z_file> ptr;
virtual ~_7z_file();
/* ----- 7Z file access ----- */
// open a 7Z file and parse its central directory
static error open(const std::string &filename, ptr &result);
// clear out all open 7Z files from the cache
static void cache_clear();
/* ----- contained file access ----- */
// iterating over files
virtual int first_file() = 0;
virtual int next_file() = 0;
// find a file index by crc, filename or both
virtual int search(std::uint32_t crc) = 0;
virtual int search(const std::string &filename) = 0;
virtual int search(std::uint32_t crc, const std::string &filename) = 0;
// information on most recently found file
virtual const std::string ¤t_name() const = 0;
virtual std::uint64_t current_uncompressed_length() const = 0;
virtual std::uint32_t current_crc() const = 0;
// decompress the most recently found file in the _7Z
virtual error decompress(void *buffer, std::uint32_t length) = 0;
};
#endif // MAME_LIB_UTIL_UN7Z_H
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