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DESIRE_LZSSDecompressor.cpp
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DESIRE_LZSSDecompressor.cpp
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#include <iostream>
#include <stdio.h>
size_t LZSS_Decode(void* _src, void* _dst)
{
unsigned int uncompressed_size; // w20
int compressed_size; // w22
int compressed_flag; // w24
uint8_t* v5; // x19
int v6; // w25
int v7; // w23
char* data_pointer; // x26
__int64 v9; // x8
int v10; // w9
int v11; // w9
signed __int64 v12; // x25
int v13; // w8
int v14; // w21
uncompressed_size = *(uint32_t*)_src;
if (_dst)
{
compressed_size = *((uint32_t*)_src + 1) - 12;
if (compressed_size >= 1)
{
compressed_flag = *((uint32_t*)_src + 2);
v5 = (uint8_t*)_dst;
v6 = 0;
v7 = 0;
data_pointer = (char*)_src + 12;
while (1)
{
v9 = v6;
v10 = (unsigned __int8)data_pointer[v6];
if (compressed_flag != v10)
break;
++v6;
v11 = (unsigned __int8)data_pointer[v9 + 1];
if (compressed_flag == v11)
{
v5[v7] = compressed_flag;
LABEL_8:
++v6;
++v7;
if (v6 >= compressed_size)
return uncompressed_size;
}
else
{
v12 = v9 + 2;
v13 = v7 - v11;
v14 = (unsigned __int8)data_pointer[v12];
if (compressed_flag < v11)
++v13;
memcpy(&v5[v7], &v5[v13], (unsigned __int8)data_pointer[v12]);
v6 = v12 + 1;
v7 += v14;
if (v6 >= compressed_size)
return uncompressed_size;
}
}
v5[v7] = v10;
goto LABEL_8;
}
}
return uncompressed_size;
}
int main(int argc, char* argv[])
{
FILE* file = new FILE;
std::string var1 = argv[1];
std::string var2 = argv[2];
fopen_s(&file, var1.c_str(), "rb");
uint32_t uncompressed_size = 0;
uint32_t compressed_size = 0;
fread(&uncompressed_size, 1, 4, file);
fread(&compressed_size, 1, 4, file);
void* data = (void*)malloc(compressed_size);
fseek(file, 0, 0);
fread(data, 1, compressed_size, file);
void* uncompressed = (void*)malloc(uncompressed_size);
size_t size = LZSS_Decode(data, uncompressed);
FILE* new_file = new FILE;
fopen_s(&new_file, var2.c_str(), "wb");
fwrite(uncompressed, size, 1, new_file);
std::cout << "Hello World!\n";
}