sigonasr2/SHNFileDecryptor
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So we learned the vector version is faster (when debugging is not enabled.

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This commit is contained in:
sigonasr2 2023-08-04 01:40:28 -05:00
parent 3a0d73eb79
commit cfc197ac27
1 changed files with 22 additions and 46 deletions
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68
SHNFileDecryptor/SHNFileDecryptor.cpp
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@ -4,7 +4,6 @@
#include <iostream>
#include <string>
#include <chrono>
#include <list>
typedef std::byte byte;
typedef char sbyte;
@ -39,8 +38,8 @@ class SHNFile{
num = num3;
}
}
std::list<byte>ReadBytes(int bytes){
std::list<byte>byteArr={};
std::vector<byte>ReadBytes(int bytes){
std::vector<byte>byteArr={};
for(int i=0;i<bytes;i++){
if(marker<data.size()){
byteArr.push_back(data[marker]);
@ -52,47 +51,31 @@ class SHNFile{
return byteArr;
}
byte ReadByte(){
std::list<byte>b=ReadBytes(1);
std::vector<byte>b=ReadBytes(1);
if(b.size()>0){
return b.front();
return b[0];
} else {
return byte(0);
}
}
uint16_t ReadUInt16(){
std::list<byte>intBytes=ReadBytes(2);
uint16_t numb = uint16_t(intBytes.back())<<8;
intBytes.pop_back();
numb |= uint16_t(intBytes.back());
std::vector<byte>intBytes=ReadBytes(2);
uint16_t numb = uint16_t(intBytes[1])<<8|uint16_t(intBytes[0]);
return numb;
}
int16_t ReadInt16(){
std::list<byte>intBytes=ReadBytes(2);
int16_t numb = int16_t(intBytes.back())<<8;
intBytes.pop_back();
numb |= int16_t(intBytes.back());
std::vector<byte>intBytes=ReadBytes(2);
int16_t numb = int16_t(intBytes[1])<<8|int16_t(intBytes[0]);
return numb;
}
uint32_t ReadUInt32(){
std::list<byte>intBytes=ReadBytes(4);
uint32_t numb = uint32_t(intBytes.back())<<24;
intBytes.pop_back();
numb |= uint32_t(intBytes.back())<<16;
intBytes.pop_back();
numb |= uint32_t(intBytes.back())<<8;
intBytes.pop_back();
numb |= uint32_t(intBytes.back());
std::vector<byte>intBytes=ReadBytes(4);
uint32_t numb = uint32_t(intBytes[3])<<24|uint32_t(intBytes[2])<<16|uint32_t(intBytes[1])<<8|uint32_t(intBytes[0]);
return numb;
}
int ReadInt32(){
std::list<byte>intBytes=ReadBytes(4);
int numb = int(intBytes.back())<<24;
intBytes.pop_back();
numb |= int(intBytes.back())<<16;
intBytes.pop_back();
numb |= int(intBytes.back())<<8;
intBytes.pop_back();
numb |= int(intBytes.back());
std::vector<byte>intBytes=ReadBytes(4);
int numb = int(intBytes[3])<<24|int(intBytes[2])<<16|int(intBytes[1])<<8|int(intBytes[0]);
return numb;
}
struct Column{
@ -101,38 +84,31 @@ class SHNFile{
int length=0;
};
std::string ReadString(int bytes){
std::list<byte>strBytes=ReadBytes(bytes);
std::vector<byte>strBytes=ReadBytes(bytes);
std::string str="";
for(auto it=strBytes.begin();it!=strBytes.end();++it){
if(*it!=byte(0)){
str+=unsigned char(*it);
for(int i=0;i<strBytes.size();i++){
if(strBytes[i]!=byte(0)){
str+=unsigned char(strBytes[i]);
}
}
return str;
}
float ReadSingle(){
std::list<byte>strBytes=ReadBytes(4);
byte bytes[4];
bytes[0]=strBytes.front();
strBytes.pop_front();
bytes[1]=strBytes.front();
strBytes.pop_front();
bytes[2]=strBytes.front();
strBytes.pop_front();
bytes[3]=strBytes.front();
std::vector<byte>strBytes=ReadBytes(4);
byte bytes[]={strBytes[0],strBytes[1],strBytes[2],strBytes[3]};
float f;
memcpy(&f,&bytes,sizeof(float));
return f;
}
sbyte ReadSByte(){
return sbyte(ReadBytes(1).front());
return sbyte(ReadBytes(1)[0]);
}
std::string ReadString(){
std::string str="";
while(true){
std::list<byte>byteArr=ReadBytes(1);
if(byteArr.size()>0&&byteArr.front()!=byte(0)){
str+=unsigned char(byteArr.front());
std::vector<byte>byteArr=ReadBytes(1);
if(byteArr.size()>0&&byteArr[0]!=byte(0)){
str+=unsigned char(byteArr[0]);
}else{
break;
}