mirror of
https://github.com/Relintai/pandemonium_engine.git
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105 lines
4.1 KiB
C++
105 lines
4.1 KiB
C++
/*************************************************************************/
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/* lz4_compressor.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* PANDEMONIUM ENGINE */
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/* https://github.com/Relintai/pandemonium_engine */
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/*************************************************************************/
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/* Copyright (c) 2022-present Péter Magyar. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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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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#include "lz4_compressor.h"
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#include "./thirdparty/lz4/lz4.h"
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PoolByteArray LZ4Compressor::compress_data(const PoolByteArray &data) const {
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PoolByteArray arr;
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int size = data.size();
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PoolByteArray::Read dr = data.read();
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const uint8_t *ch = dr.ptr();
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int bound = LZ4_compressBound(size);
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arr.resize(bound + sizeof(int));
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PoolByteArray::Write w = arr.write();
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uint8_t *wptr = w.ptr();
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reinterpret_cast<int *>(wptr)[0] = data.size();
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int ns = LZ4_compress_default(reinterpret_cast<const char *>(ch), reinterpret_cast<char *>(&wptr[sizeof(int)]), size, bound);
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w.release();
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arr.resize(ns + sizeof(int));
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return arr;
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}
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PoolByteArray LZ4Compressor::decompress_data(const PoolByteArray &data) const {
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PoolByteArray arr;
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int ds = data.size();
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if (ds == 0) {
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return arr;
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}
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PoolByteArray::Read dr = data.read();
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const uint8_t *ch = dr.ptr();
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int size = reinterpret_cast<const int *>(ch)[0];
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arr.resize(size);
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PoolByteArray::Write w = arr.write();
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uint8_t *wptr = w.ptr();
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int ns = LZ4_decompress_safe(reinterpret_cast<const char *>(&ch[sizeof(int)]), reinterpret_cast<char *>(wptr), ds - sizeof(int), size);
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if (ns != size) {
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arr.resize(ns);
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ERR_PRINT("ns != size");
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}
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return arr;
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}
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int LZ4Compressor::LZ4_compressBound(int inputSize) {
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return ::LZ4_compressBound(inputSize);
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}
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int LZ4Compressor::LZ4_compress_default(const char *src, char *dst, int srcSize, int dstCapacity) {
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return ::LZ4_compress_default(src, dst, srcSize, dstCapacity);
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}
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int LZ4Compressor::LZ4_decompress_safe(const char *src, char *dst, int compressedSize, int dstCapacity) {
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return ::LZ4_decompress_safe(src, dst, compressedSize, dstCapacity);
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}
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LZ4Compressor::LZ4Compressor() {
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}
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LZ4Compressor::~LZ4Compressor() {
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}
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void LZ4Compressor::_bind_methods() {
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ClassDB::bind_method(D_METHOD("compress_data", "data"), &LZ4Compressor::compress_data);
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ClassDB::bind_method(D_METHOD("decompress_data", "data"), &LZ4Compressor::decompress_data);
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}
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