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