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GODOT IS OPEN SOURCE

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Juan Linietsky
2014-02-09 22:10:30 -03:00
parent 0e49da1687
commit 0b806ee0fc
3138 changed files with 1294441 additions and 0 deletions
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91
core/io/compression.cpp Normal file
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/*************************************************************************/
/* compression.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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. */
/*************************************************************************/
#include "compression.h"
#include "fastlz.h"
#include "os/copymem.h"
int Compression::compress(uint8_t *p_dst, const uint8_t *p_src, int p_src_size,Mode p_mode) {
switch(p_mode) {
case MODE_FASTLZ: {
if (p_src_size<16) {
uint8_t src[16];
zeromem(&src[p_src_size],16-p_src_size);
copymem(src,p_src,p_src_size);
return fastlz_compress(src,16,p_dst);
} else {
return fastlz_compress(p_src,p_src_size,p_dst);
}
} break;
}
ERR_FAIL_V(-1);
}
int Compression::get_max_compressed_buffer_size(int p_src_size,Mode p_mode){
switch(p_mode) {
case MODE_FASTLZ: {
int ss = p_src_size+p_src_size*6/100;
if (ss<66)
ss=66;
return ss;
} break;
}
ERR_FAIL_V(-1);
}
void Compression::decompress(uint8_t *p_dst, int p_dst_max_size, const uint8_t *p_src, int p_src_size,Mode p_mode){
switch(p_mode) {
case MODE_FASTLZ: {
if (p_dst_max_size<16) {
uint8_t dst[16];
fastlz_decompress(p_src,p_src_size,dst,16);
copymem(p_dst,dst,p_dst_max_size);
} else {
fastlz_decompress(p_src,p_src_size,p_dst,p_dst_max_size);
}
return;
} break;
}
ERR_FAIL();
}