code.vuplus.com Git - vuplus_xbmc/blob - lib/UnrarXLib/rawread.cpp

   1 #include "rar.hpp"
   2
   3 RawRead::RawRead(File *SrcFile)
   4 {
   5   RawRead::SrcFile=SrcFile;
   6   ReadPos=0;
   7   DataSize=0;
   8 #ifndef SHELL_EXT
   9   Crypt=NULL;
  10 #endif
  11 }
  12
  13
  14 void RawRead::Read(int Size)
  15 {
  16 #if !defined(SHELL_EXT) && !defined(NOCRYPT)
  17   if (Crypt!=NULL)
  18   {
  19     int CurSize=Data.Size();
  20     int SizeToRead=Size-(CurSize-DataSize);
  21     if (SizeToRead>0)
  22     {
  23       int AlignedReadSize=SizeToRead+((~SizeToRead+1)&0xf);
  24       Data.Add(AlignedReadSize);
  25       int ReadSize=SrcFile->Read(&Data[CurSize],AlignedReadSize);
  26       Crypt->DecryptBlock(&Data[CurSize],AlignedReadSize);
  27       DataSize+=ReadSize==0 ? 0:Size;
  28     }
  29     else
  30       DataSize+=Size;
  31   }
  32   else
  33 #endif
  34     if (Size!=0)
  35     {
  36       Data.Add(Size);
  37       DataSize+=SrcFile->Read(&Data[DataSize],Size);
  38     }
  39 }
  40
  41
  42 void RawRead::Read(byte *SrcData,int Size)
  43 {
  44   if (Size!=0)
  45   {
  46     Data.Add(Size);
  47     memcpy(&Data[DataSize],SrcData,Size);
  48     DataSize+=Size;
  49   }
  50 }
  51
  52
  53 void RawRead::Get(byte &Field)
  54 {
  55   Field=Data[ReadPos];
  56   ReadPos++;
  57 }
  58
  59
  60 void RawRead::Get(ushort &Field)
  61 {
  62   Field=Data[ReadPos]+(Data[ReadPos+1]<<8);
  63   ReadPos+=2;
  64 }
  65
  66
  67 void RawRead::Get(uint &Field)
  68 {
  69   Field=Data[ReadPos]+(Data[ReadPos+1]<<8)+(Data[ReadPos+2]<<16)+
  70         (Data[ReadPos+3]<<24);
  71   ReadPos+=4;
  72 }
  73
  74
  75 void RawRead::Get8(Int64 &Field)
  76 {
  77   uint Low,High;
  78   Get(Low);
  79   Get(High);
  80   Field=int32to64(High,Low);
  81 }
  82
  83
  84 void RawRead::Get(byte *Field,int Size)
  85 {
  86   memcpy(Field,&Data[ReadPos],Size);
  87   ReadPos+=Size;
  88 }
  89
  90
  91 void RawRead::Get(wchar *Field,int Size)
  92 {
  93   RawToWide(&Data[ReadPos],Field,Size);
  94   ReadPos+=2*Size;
  95 }
  96
  97
  98 uint RawRead::GetCRC(bool ProcessedOnly)
  99 {
 100   return(DataSize>2 ? CRC(0xffffffff,&Data[2],(ProcessedOnly ? ReadPos:DataSize)-2):0xffffffff);
 101 }