bool File::RawSeek(Int64 Offset,int Method)
{
if (hFile==BAD_HANDLE)
return(true);
if (!is64plus(Offset) && Method!=SEEK_SET)
{
Offset=(Method==SEEK_CUR ? Tell():FileLength())+Offset;
Method=SEEK_SET;
}
/*#ifdef _WIN_32
LONG HighDist=int64to32(Offset>>32);
if (SetFilePointer(hFile,int64to32(Offset),&HighDist,Method)==0xffffffff &&
GetLastError()!=NO_ERROR)
return(false);
#else*/
LastWrite=false;
#ifdef _LARGEFILE_SOURCE
if (fseeko(hFile,Offset,Method)!=0)
#else
if (fseek(hFile,int64to32(Offset),Method)!=0)
#endif
return(false);
//#endif
return(true);
}
void Unpack::Unpack20(bool Solid)
{
const
static unsigned char LDecode[]={0,1,2,3,4,5,6,7,8,10,12,14,16,20,24,28,32,40,48,56,64,80,96,112,128,160,192,224};
const
static unsigned char LBits[]= {0,0,0,0,0,0,0,0,1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5};
const
static int DDecode[]={0,1,2,3,4,6,8,12,16,24,32,48,64,96,128,192,256,384,512,768,1024,1536,2048,3072,4096,6144,8192,12288,16384,24576,32768U,49152U,65536,98304,131072,196608,262144,327680,393216,458752,524288,589824,655360,720896,786432,851968,917504,983040};
const
static unsigned char DBits[]= {0,0,0,0,1,1,2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16};
const
static unsigned char SDDecode[]={0,4,8,16,32,64,128,192};
const
static unsigned char SDBits[]= {2,2,3, 4, 5, 6, 6, 6};
unsigned int Bits;
if (Suspended)
UnpPtr=WrPtr;
else
{
UnpInitData(Solid);
if (!UnpReadBuf())
return;
if (!Solid)
if (!ReadTables20())
return;
--DestUnpSize;
}
while (is64plus(DestUnpSize))
{
UnpPtr&=MAXWINMASK;
if (InAddr>ReadTop-30)
if (!UnpReadBuf())
break;
if (((WrPtr-UnpPtr) & MAXWINMASK)<270 && WrPtr!=UnpPtr)
{
OldUnpWriteBuf();
if (Suspended)
return;
}
if (UnpAudioBlock)
{
int AudioNumber=DecodeNumber((struct Decode *)&MD[UnpCurChannel]);
if (AudioNumber==256)
{
if (!ReadTables20())
break;
continue;
}
Window[UnpPtr++]=DecodeAudio(AudioNumber);
if (++UnpCurChannel==UnpChannels)
UnpCurChannel=0;
--DestUnpSize;
continue;
}
int Number=DecodeNumber((struct Decode *)&LD);
if (Number<256)
{
Window[UnpPtr++]=(byte)Number;
--DestUnpSize;
continue;
}
if (Number>269)
{
int Length=LDecode[Number-=270]+3;
if ((Bits=LBits[Number])>0)
{
Length+=getbits()>>(16-Bits);
addbits(Bits);
}
int DistNumber=DecodeNumber((struct Decode *)&DD);
unsigned int Distance=DDecode[DistNumber]+1;
if ((Bits=DBits[DistNumber])>0)
{
Distance+=getbits()>>(16-Bits);
addbits(Bits);
}
