dolphin/Source/Plugins/Plugin_VideoDX9/Src/W32Util/ChunkFile.cpp

266 lines
4.7 KiB
C++

#include "ChunkFile.h"
namespace W32Util
{
ChunkFile::ChunkFile(const TCHAR *filename, bool _read)
{
data=0;
fastMode=false;
if (file.Open(filename,_read ? FILE_READ : FILE_WRITE))
{
didFail=false;
}
else
{
didFail=true;
return;
}
int fSize = file.GetSize();
fastMode = _read ? true : false;
if (fastMode)
{
data = new char[fSize];
file.Read(data,fSize);
file.Close();
// MessageBox(theApp->getHWND(),TEXT("FILECLOSED"),TEXT("MOSJ"),0);
}
eof=fSize;
numLevels=0;
read=_read;
pos=0;
didFail=false;
}
ChunkFile::~ChunkFile()
{
if (fastMode && data)
delete [] data;
else
file.Close();
}
int ChunkFile::ReadInt()
{
if (pos<eof)
{
/*
int temp = *(int *)(data+pos);
pos+=4;
*/
pos+=4;
if (fastMode)
return *(int *)(data+pos-4);
else
return file.ReadInt();
}
else
{
return 0;
}
}
void ChunkFile::WriteInt(int i)
{
/*
*(int *)(data+pos) = i;
pos+=4;
*/
file.WriteInt(i);
pos+=4;
}
//let's get into the business
bool ChunkFile::Descend(unsigned int id)
{
id=flipID(id);
if (read)
{
bool found = false;
int startPos = pos;
ChunkInfo temp = stack[numLevels];
//save information to restore after the next Ascend
stack[numLevels].parentStartLocation = pos;
stack[numLevels].parentEOF = eof;
int firstID = 0;
//let's search through children..
while(pos<eof)
{
stack[numLevels].ID = ReadInt();
if (firstID == 0) firstID=stack[numLevels].ID|1;
stack[numLevels].length = ReadInt();
stack[numLevels].startLocation = pos;
if (stack[numLevels].ID == id)
{
found = true;
break;
}
else
{
SeekTo(pos + stack[numLevels].length); //try next block
}
}
//if we found nothing, return false so the caller can skip this
if (!found)
{
/*
pos = startPos;
char temp1[5]; TCHAR temp2[5];
temp1[4]=0; temp2[4]=0;
*(int *)temp1 =id;
TCHAR tempx[256];
for (int i=0; i<4; i++)
temp2[i]=temp1[i];
_stprintf(tempx,TEXT("Couldn't find chunk \"%s\" in file"),temp2);
MessageBox(theApp->getHWND(),tempx,0,0);
*/
stack[numLevels]=temp;
SeekTo(stack[numLevels].parentStartLocation);
return false;
}
//descend into it
//pos was set inside the loop above
eof = stack[numLevels].startLocation + stack[numLevels].length;
numLevels++;
return true;
}
else
{
//write a chunk id, and prepare for filling in length later
WriteInt(id);
WriteInt(0); //will be filled in by Ascend
stack[numLevels].startLocation=pos;
numLevels++;
return true;
}
}
void ChunkFile::SeekTo(int _pos)
{
if (!fastMode)
file.SeekBeg(_pos);
pos=_pos;
}
//let's Ascend out
void ChunkFile::Ascend()
{
if (read)
{
//Ascend, and restore information
numLevels--;
SeekTo(stack[numLevels].parentStartLocation);
eof = stack[numLevels].parentEOF;
}
else
{
numLevels--;
//now fill in the written length automatically
int posNow = pos;
SeekTo(stack[numLevels].startLocation - 4);
WriteInt(posNow-stack[numLevels].startLocation);
SeekTo(posNow);
}
}
//read a block
void ChunkFile::ReadData(void *what, int count)
{
if (fastMode)
memcpy(what,data+pos,count);
else
file.Read(what,count);
pos+=count;
char temp[4]; //discarded
count &= 3;
if (count)
{
count=4-count;
if (!fastMode)
file.Read(temp,count);
pos+=count;
}
}
//write a block
void ChunkFile::WriteData(void *what, int count)
{
/*
memcpy(data+pos,what,count);
pos += count;
*/
file.Write(what,count);
pos+=count;
char temp[5]={0,0,0,0,0};
count &= 3;
if (count)
{
count=4-count;
file.Write(temp,count);
pos+=count;
}
}
/*
void ChunkFile::WriteString(String str)
{
wchar_t *text;
int len=str.length();
#ifdef UNICODE
text = str.getPointer();
#else
text=new wchar_t[len+1];
str.toUnicode(text);
#endif
WriteInt(len);
WriteData((char *)text,len*sizeof(wchar_t));
#ifndef UNICODE
delete [] text;
#endif
}
String ChunkFile::readString()
{
int len=ReadInt();
wchar_t *text = new wchar_t[len+1];
ReadData((char *)text,len*sizeof(wchar_t));
text[len]=0;
#ifdef UNICODE
String s(text);
delete [] text;
return s;
#else
String temp;
temp.fromUnicode(text);
delete [] text;
return temp;
#endif
}
*/
int ChunkFile::GetCurrentChunkSize()
{
if (numLevels)
return stack[numLevels-1].length;
else
return 0;
}
}