/*************************************************************************/ /* file_access_compressed.h */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2022 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 "core/io/compression.h" #include "core/io/file_access.h" class FileAccessCompressed : public FileAccess { Compression::Mode cmode = Compression::MODE_ZSTD; bool writing = false; uint64_t write_pos = 0; uint8_t *write_ptr = nullptr; uint32_t write_buffer_size = 0; uint64_t write_max = 0; uint32_t block_size = 0; mutable bool read_eof = false; mutable bool at_end = false; struct ReadBlock { uint32_t csize; uint64_t offset; }; mutable Vector<uint8_t> comp_buffer; uint8_t *read_ptr = nullptr; mutable uint32_t read_block = 0; uint32_t read_block_count = 0; mutable uint32_t read_block_size = 0; mutable uint64_t read_pos = 0; Vector<ReadBlock> read_blocks; uint64_t read_total = 0; String magic = "GCMP"; mutable Vector<uint8_t> buffer; Ref<FileAccess> f; void _close(); public: void configure(const String &p_magic, Compression::Mode p_mode = Compression::MODE_ZSTD, uint32_t p_block_size = 4096); Error open_after_magic(Ref<FileAccess> p_base); virtual Error open_internal(const String &p_path, int p_mode_flags) override; ///< open a file virtual bool is_open() const override; ///< true when file is open virtual void seek(uint64_t p_position) override; ///< seek to a given position virtual void seek_end(int64_t p_position = 0) override; ///< seek from the end of file virtual uint64_t get_position() const override; ///< get position in the file virtual uint64_t get_length() const override; ///< get size of the file virtual bool eof_reached() const override; ///< reading passed EOF virtual uint8_t get_8() const override; ///< get a byte virtual uint64_t get_buffer(uint8_t *p_dst, uint64_t p_length) const override; virtual Error get_error() const override; ///< get last error virtual void flush() override; virtual void store_8(uint8_t p_dest) override; ///< store a byte virtual bool file_exists(const String &p_name) override; ///< return true if a file exists virtual uint64_t _get_modified_time(const String &p_file) override; virtual uint32_t _get_unix_permissions(const String &p_file) override; virtual Error _set_unix_permissions(const String &p_file, uint32_t p_permissions) override; FileAccessCompressed() {} virtual ~FileAccessCompressed(); }; #endif // FILE_ACCESS_COMPRESSED_H