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Some missing from merge.

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Signed-off-by: Salja <salja2012@hotmail.de>
This commit is contained in:
Salja 2012-08-05 14:54:07 +02:00 • committed by Antz
parent ec939a5bce
commit f4be15a7af
1895 changed files with 160408 additions and 53601 deletions
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48
dep/StormLib/src/sparse/sparse.cpp
View file

@ -14,24 +14,22 @@
/* 19.11.03 1.01 Dan Big endian handling */
/* 08.12.03 2.01 Dan High-memory handling (> 0x80000000) */
/*****************************************************************************/
#include <assert.h>
#include <string.h>
#include "sparse.h"
//-----------------------------------------------------------------------------
// Public functions
void CompressSparse(void * pvOutBuffer, int * pcbOutBuffer, void * pvInBuffer, int cbInBuffer)
void CompressSparse(unsigned char * pbOutBuffer, int * pcbOutBuffer, unsigned char * pbInBuffer, int cbInBuffer)
{
unsigned char * pbOutBufferEnd = (unsigned char *)pvOutBuffer + *pcbOutBuffer;
unsigned char * pbInBufferEnd = (unsigned char *)pvInBuffer + cbInBuffer;
unsigned char * pbLastNonZero = (unsigned char *)pvInBuffer;
unsigned char * pbOutBuffer0 = (unsigned char *)pvOutBuffer;
unsigned char * pbInBuffPtr = (unsigned char *)pvInBuffer;
unsigned char * pbOutBuffer = (unsigned char *)pvOutBuffer;
unsigned char * pbInBuffer = (unsigned char *)pvInBuffer;
unsigned char * pbOutBufferEnd = pbOutBuffer + *pcbOutBuffer;
unsigned char * pbInBufferEnd = pbInBuffer + cbInBuffer;
unsigned char * pbLastNonZero = pbInBuffer;
unsigned char * pbOutBuffer0 = pbOutBuffer;
unsigned char * pbInBuffPtr = pbInBuffer;
size_t NumberOfNonZeros;
size_t NumberOfZeros;
@ -88,7 +86,7 @@ void CompressSparse(void * pvOutBuffer, int * pcbOutBuffer, void * pvInBuffer, i
// Put marker that means "0x80 of nonzeros"
*pbOutBuffer++ = 0xFF;
memcpy(pbOutBuffer, pbInBuffer, 0x80);
// Adjust counter of nonzeros and both pointers
NumberOfNonZeros -= 0x80;
pbOutBuffer += 0x80;
@ -108,7 +106,7 @@ void CompressSparse(void * pvOutBuffer, int * pcbOutBuffer, void * pvInBuffer, i
// Put marker that means "1 nonzero byte"
*pbOutBuffer++ = 0x80;
memcpy(pbOutBuffer, pbInBuffer, 1);
// Adjust counter of nonzeros and both pointers
NumberOfNonZeros--;
pbOutBuffer++;
@ -130,6 +128,20 @@ void CompressSparse(void * pvOutBuffer, int * pcbOutBuffer, void * pvInBuffer, i
pbOutBuffer += NumberOfNonZeros;
pbInBuffer += NumberOfNonZeros;
}
else
{
// Verify if we still have enough space in output buffer
if((pbOutBuffer + 2) >= pbOutBufferEnd)
return;
// Put marker that means "1 nonzero byte"
*pbOutBuffer++ = 0x80;
memcpy(pbOutBuffer, pbInBuffer, 1);
// Adjust pointers
pbOutBuffer++;
pbInBuffer++;
}
}
// Now flush all zero bytes
@ -171,7 +183,7 @@ void CompressSparse(void * pvOutBuffer, int * pcbOutBuffer, void * pvInBuffer, i
// Put marker that means "Several zeros"
*pbOutBuffer++ = (unsigned char)(NumberOfZeros - 3);
// Adjust pointer
pbInBuffer += NumberOfZeros;
}
@ -196,7 +208,7 @@ void CompressSparse(void * pvOutBuffer, int * pcbOutBuffer, void * pvInBuffer, i
// Terminate with a marker that means "0x80 of nonzeros"
*pbOutBuffer++ = 0xFF;
memcpy(pbOutBuffer, pbInBuffer, NumberOfNonZeros);
// Adjust pointer
pbOutBuffer += NumberOfNonZeros;
break;
@ -222,11 +234,9 @@ void CompressSparse(void * pvOutBuffer, int * pcbOutBuffer, void * pvInBuffer, i
*pcbOutBuffer = (int)(pbOutBuffer - pbOutBuffer0);
}
int DecompressSparse(void * pvOutBuffer, int * pcbOutBuffer, void * pvInBuffer, int cbInBuffer)
int DecompressSparse(unsigned char * pbOutBuffer, int * pcbOutBuffer, unsigned char * pbInBuffer, int cbInBuffer)
{
unsigned char * pbInBufferEnd = (unsigned char *)pvInBuffer + cbInBuffer;
unsigned char * pbOutBuffer = (unsigned char *)pvOutBuffer;
unsigned char * pbInBuffer = (unsigned char *)pvInBuffer;
unsigned char * pbInBufferEnd = pbInBuffer + cbInBuffer;
unsigned int cbChunkSize;
unsigned int cbOutBuffer = 0;
unsigned int OneByte;
@ -246,7 +256,7 @@ int DecompressSparse(void * pvOutBuffer, int * pcbOutBuffer, void * pvInBuffer,
cbOutBuffer |= (OneByte << 0x00);
// Verify the size of the stream against the output buffer size
if(cbOutBuffer > (unsigned int)*pcbOutBuffer)
if(cbOutBuffer > *pcbOutBuffer)
return 0;
// Put the output size to the buffer