/*************************************************************************/ /* file_access_compressed.h */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2018 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