101 lines
4.3 KiB
C++
101 lines
4.3 KiB
C++
/*************************************************************************/
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/* file_access_compressed.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef FILE_ACCESS_COMPRESSED_H
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#define FILE_ACCESS_COMPRESSED_H
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#include "core/io/compression.h"
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#include "core/io/file_access.h"
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class FileAccessCompressed : public FileAccess {
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Compression::Mode cmode = Compression::MODE_ZSTD;
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bool writing = false;
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uint64_t write_pos = 0;
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uint8_t *write_ptr = nullptr;
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uint32_t write_buffer_size = 0;
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uint64_t write_max = 0;
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uint32_t block_size = 0;
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mutable bool read_eof = false;
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mutable bool at_end = false;
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struct ReadBlock {
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uint32_t csize;
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uint64_t offset;
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};
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mutable Vector<uint8_t> comp_buffer;
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uint8_t *read_ptr = nullptr;
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mutable uint32_t read_block = 0;
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uint32_t read_block_count = 0;
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mutable uint32_t read_block_size = 0;
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mutable uint64_t read_pos = 0;
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Vector<ReadBlock> read_blocks;
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uint64_t read_total = 0;
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String magic = "GCMP";
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mutable Vector<uint8_t> buffer;
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FileAccess *f = nullptr;
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public:
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void configure(const String &p_magic, Compression::Mode p_mode = Compression::MODE_ZSTD, uint32_t p_block_size = 4096);
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Error open_after_magic(FileAccess *p_base);
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virtual Error _open(const String &p_path, int p_mode_flags); ///< open a file
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virtual void close(); ///< close a file
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virtual bool is_open() const; ///< true when file is open
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virtual void seek(uint64_t p_position); ///< seek to a given position
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virtual void seek_end(int64_t p_position = 0); ///< seek from the end of file
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virtual uint64_t get_position() const; ///< get position in the file
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virtual uint64_t get_length() const; ///< get size of the file
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virtual bool eof_reached() const; ///< reading passed EOF
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virtual uint8_t get_8() const; ///< get a byte
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virtual uint64_t get_buffer(uint8_t *p_dst, uint64_t p_length) const;
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virtual Error get_error() const; ///< get last error
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virtual void flush();
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virtual void store_8(uint8_t p_dest); ///< store a byte
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virtual bool file_exists(const String &p_name); ///< return true if a file exists
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virtual uint64_t _get_modified_time(const String &p_file);
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virtual uint32_t _get_unix_permissions(const String &p_file);
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virtual Error _set_unix_permissions(const String &p_file, uint32_t p_permissions);
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FileAccessCompressed() {}
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virtual ~FileAccessCompressed();
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};
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#endif // FILE_ACCESS_COMPRESSED_H
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