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/*************************************************************************/
/* file_access_compressed.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef FILE_ACCESS_COMPRESSED_H
#define FILE_ACCESS_COMPRESSED_H
#include "io/compression.h"
#include "os/file_access.h"
class FileAccessCompressed : public FileAccess {
Compression::Mode cmode;
bool writing;
uint32_t write_pos;
uint8_t *write_ptr;
uint32_t write_buffer_size;
uint32_t write_max;
uint32_t block_size;
mutable bool read_eof;
mutable bool at_end;
struct ReadBlock {
int csize;
int offset;
};
mutable Vector<uint8_t> comp_buffer;
uint8_t *read_ptr;
mutable int read_block;
int read_block_count;
mutable int read_block_size;
mutable int read_pos;
Vector<ReadBlock> read_blocks;
uint32_t read_total;
String magic;
mutable Vector<uint8_t> buffer;
FileAccess *f;
public:
void configure(const String &p_magic, Compression::Mode p_mode = Compression::MODE_ZSTD, int p_block_size = 4096);
Error open_after_magic(FileAccess *p_base);
virtual Error _open(const String &p_path, int p_mode_flags); ///< open a file
virtual void close(); ///< close a file
virtual bool is_open() const; ///< true when file is open
virtual void seek(size_t p_position); ///< seek to a given position
virtual void seek_end(int64_t p_position = 0); ///< seek from the end of file
virtual size_t get_position() const; ///< get position in the file
virtual size_t get_len() const; ///< get size of the file
virtual bool eof_reached() const; ///< reading passed EOF
virtual uint8_t get_8() const; ///< get a byte
virtual int get_buffer(uint8_t *p_dst, int p_length) const;
virtual Error get_error() const; ///< get last error
virtual void flush();
virtual void store_8(uint8_t p_dest); ///< store a byte
virtual bool file_exists(const String &p_name); ///< return true if a file exists
virtual uint64_t _get_modified_time(const String &p_file);
FileAccessCompressed();
virtual ~FileAccessCompressed();
};
#endif // FILE_ACCESS_COMPRESSED_H
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