libclamunrar/rawint.hpp
01eebc13
 #ifndef _RAR_RAWINT_
 #define _RAR_RAWINT_
 
 #define  rotls(x,n,xsize)  (((x)<<(n)) | ((x)>>(xsize-(n))))
 #define  rotrs(x,n,xsize)  (((x)>>(n)) | ((x)<<(xsize-(n))))
 #define  rotl32(x,n)       rotls(x,n,32)
 #define  rotr32(x,n)       rotrs(x,n,32)
 
 inline uint RawGet2(const void *Data)
 {
   byte *D=(byte *)Data;
   return D[0]+(D[1]<<8);
 }
 
 
 inline uint32 RawGet4(const void *Data)
 {
 #if defined(BIG_ENDIAN) || !defined(ALLOW_MISALIGNED)
   byte *D=(byte *)Data;
   return D[0]+(D[1]<<8)+(D[2]<<16)+(D[3]<<24);
 #else
   return *(uint32 *)Data;
 #endif
 }
 
 
 inline uint64 RawGet8(const void *Data)
 {
 #if defined(BIG_ENDIAN) || !defined(ALLOW_MISALIGNED)
   byte *D=(byte *)Data;
   return INT32TO64(RawGet4(D+4),RawGet4(D));
 #else
   return *(uint64 *)Data;
 #endif
 }
 
 
 inline void RawPut2(uint Field,void *Data)
 {
   byte *D=(byte *)Data;
   D[0]=(byte)(Field);
   D[1]=(byte)(Field>>8);
 }
 
 
 inline void RawPut4(uint32 Field,void *Data)
 {
 #if defined(BIG_ENDIAN) || !defined(ALLOW_MISALIGNED)
   byte *D=(byte *)Data;
   D[0]=(byte)(Field);
   D[1]=(byte)(Field>>8);
   D[2]=(byte)(Field>>16);
   D[3]=(byte)(Field>>24);
 #else
   *(uint32 *)Data=Field;
 #endif
 }
 
 
 inline void RawPut8(uint64 Field,void *Data)
 {
 #if defined(BIG_ENDIAN) || !defined(ALLOW_MISALIGNED)
   byte *D=(byte *)Data;
   D[0]=(byte)(Field);
   D[1]=(byte)(Field>>8);
   D[2]=(byte)(Field>>16);
   D[3]=(byte)(Field>>24);
   D[4]=(byte)(Field>>32);
   D[5]=(byte)(Field>>40);
   D[6]=(byte)(Field>>48);
   D[7]=(byte)(Field>>56);
 #else
   *(uint64 *)Data=Field;
 #endif
 }
 
 
 #if defined(LITTLE_ENDIAN) && defined(ALLOW_MISALIGNED)
 #define USE_MEM_BYTESWAP
 #endif
 
 // Load 4 big endian bytes from memory and return uint32.
 inline uint32 RawGetBE4(const byte *m)
 {
 #if defined(USE_MEM_BYTESWAP) && defined(_MSC_VER)
   return _byteswap_ulong(*(uint32 *)m);
 #elif defined(USE_MEM_BYTESWAP) && (__GNUC__ > 3) && (__GNUC_MINOR__ > 2)
   return __builtin_bswap32(*(uint32 *)m);
 #else
   return uint32(m[0]<<24) | uint32(m[1]<<16) | uint32(m[2]<<8) | m[3];
 #endif
 }
 
 
 // Save integer to memory as big endian.
 inline void RawPutBE4(uint32 i,byte *mem)
 {
 #if defined(USE_MEM_BYTESWAP) && defined(_MSC_VER)
   *(uint32*)mem = _byteswap_ulong(i);
 #elif defined(USE_MEM_BYTESWAP) && (__GNUC__ > 3) && (__GNUC_MINOR__ > 2)
   *(uint32*)mem = __builtin_bswap32(i);
 #else
   mem[0]=byte(i>>24);
   mem[1]=byte(i>>16);
   mem[2]=byte(i>>8);
   mem[3]=byte(i);
 #endif
 }
 
 
 inline uint32 ByteSwap32(uint32 i)
 {
 #ifdef _MSC_VER
   return _byteswap_ulong(i);
 #elif (__GNUC__ > 3) && (__GNUC_MINOR__ > 2)
   return  __builtin_bswap32(i);
 #else
   return (rotl32(i,24)&0xFF00FF00)|(rotl32(i,8)&0x00FF00FF);
 #endif
 }
 
 #endif