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//-----------------------------------------------------------------------------
//
// ImageLib Sources
// Copyright (C) 2000-2009 by Denton Woods
// Last modified: 01/29/2009
//
// Filename: src-IL/include/il_endian.h
//
// Description: Handles Endian-ness
//
//-----------------------------------------------------------------------------
#ifndef IL_ENDIAN_H
#define IL_ENDIAN_H
#include "il_internal.h"
#ifdef WORDS_BIGENDIAN // This is defined by ./configure.
#ifndef __BIG_ENDIAN__
#define __BIG_ENDIAN__ 1
#endif
#endif
#if (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __BIG_ENDIAN__) \
|| (defined(__BIG_ENDIAN__) && !defined(__LITTLE_ENDIAN__))
#undef __LITTLE_ENDIAN__
#define Short(s) iSwapShort(s)
#define UShort(s) iSwapUShort(s)
#define Int(i) iSwapInt(i)
#define UInt(i) iSwapUInt(i)
#define Float(f) iSwapFloat(f)
#define Double(d) iSwapDouble(d)
#define BigShort(s)
#define BigUShort(s)
#define BigInt(i)
#define BigUInt(i)
#define BigFloat(f)
#define BigDouble(d)
#else
#undef __BIG_ENDIAN__
#undef __LITTLE_ENDIAN__ // Not sure if it's defined by any compiler...
#define __LITTLE_ENDIAN__
#define Short(s)
#define UShort(s)
#define Int(i)
#define UInt(i)
#define Float(f)
#define Double(d)
#define BigShort(s) iSwapShort(s)
#define BigUShort(s) iSwapUShort(s)
#define BigInt(i) iSwapInt(i)
#define BigUInt(i) iSwapUInt(i)
#define BigFloat(f) iSwapFloat(f)
#define BigDouble(d) iSwapDouble(d)
#endif
void iSwapUShort(ILushort *s);
void iSwapShort(ILshort *s);
void iSwapUInt(ILuint *i);
void iSwapInt(ILint *i);
void iSwapFloat(ILfloat *f);
void iSwapDouble(ILdouble *d);
ILushort GetLittleUShort();
ILshort GetLittleShort();
ILuint GetLittleUInt();
ILint GetLittleInt();
ILfloat GetLittleFloat();
ILdouble GetLittleDouble();
ILushort GetBigUShort();
ILshort GetBigShort();
ILuint GetBigUInt();
ILint GetBigInt();
ILfloat GetBigFloat();
ILdouble GetBigDouble();
ILubyte SaveLittleUShort(ILushort s);
ILubyte SaveLittleShort(ILshort s);
ILubyte SaveLittleUInt(ILuint i);
ILubyte SaveLittleInt(ILint i);
ILubyte SaveLittleFloat(ILfloat f);
ILubyte SaveLittleDouble(ILdouble d);
ILubyte SaveBigUShort(ILushort s);
ILubyte SaveBigShort(ILshort s);
ILubyte SaveBigUInt(ILuint i);
ILubyte SaveBigInt(ILint i);
ILubyte SaveBigFloat(ILfloat f);
ILubyte SaveBigDouble(ILdouble d);
#ifdef IL_ENDIAN_C
#undef NOINLINE
#undef INLINE
#define INLINE
#endif
#ifndef NOINLINE
INLINE void iSwapUShort(ILushort *s) {
#ifdef USE_WIN32_ASM
__asm {
mov ebx, s
mov al, [ebx+1]
mov ah, [ebx ]
mov [ebx], ax
}
#else
#ifdef GCC_X86_ASM
asm("ror $8,%0"
: "=r" (*s)
: "0" (*s));
#else
*s = ((*s)>>8) | ((*s)<<8);
#endif //GCC_X86_ASM
#endif //USE_WIN32_ASM
}
INLINE void iSwapShort(ILshort *s) {
iSwapUShort((ILushort*)s);
}
INLINE void iSwapUInt(ILuint *i) {
#ifdef USE_WIN32_ASM
__asm {
mov ebx, i
mov eax, [ebx]
bswap eax
mov [ebx], eax
}
#else
#ifdef GCC_X86_ASM
asm("bswap %0;"
: "+r" (*i));
#else
*i = ((*i)>>24) | (((*i)>>8) & 0xff00) | (((*i)<<8) & 0xff0000) | ((*i)<<24);
#endif //GCC_X86_ASM
#endif //USE_WIN32_ASM
}
INLINE void iSwapInt(ILint *i) {
iSwapUInt((ILuint*)i);
}
INLINE void iSwapFloat(ILfloat *f) {
iSwapUInt((ILuint*)f);
}
INLINE void iSwapDouble(ILdouble *d) {
#ifdef GCC_X86_ASM
int *t = (int*)d;
asm("bswap %2 \n"
"bswap %3 \n"
"movl %2,%1 \n"
"movl %3,%0 \n"
: "=g" (t[0]), "=g" (t[1])
: "r" (t[0]), "r" (t[1]));
#else
ILubyte t,*b = (ILubyte*)d;
#define dswap(x,y) t=b[x];b[x]=b[y];b[y]=b[x];
dswap(0,7);
dswap(1,6);
dswap(2,5);
dswap(3,4);
#undef dswap
#endif
}
INLINE ILushort GetLittleUShort() {
ILushort s;
iread(&s, sizeof(ILushort), 1);
#ifdef __BIG_ENDIAN__
iSwapUShort(&s);
#endif
return s;
}
INLINE ILshort GetLittleShort() {
ILshort s;
iread(&s, sizeof(ILshort), 1);
#ifdef __BIG_ENDIAN__
iSwapShort(&s);
#endif
return s;
}
INLINE ILuint GetLittleUInt() {
ILuint i;
iread(&i, sizeof(ILuint), 1);
#ifdef __BIG_ENDIAN__
iSwapUInt(&i);
#endif
return i;
}
INLINE ILint GetLittleInt() {
ILint i;
iread(&i, sizeof(ILint), 1);
#ifdef __BIG_ENDIAN__
iSwapInt(&i);
#endif
return i;
}
INLINE ILfloat GetLittleFloat() {
ILfloat f;
iread(&f, sizeof(ILfloat), 1);
#ifdef __BIG_ENDIAN__
iSwapFloat(&f);
#endif
return f;
}
INLINE ILdouble GetLittleDouble() {
ILdouble d;
iread(&d, sizeof(ILdouble), 1);
#ifdef __BIG_ENDIAN__
iSwapDouble(&d);
#endif
return d;
}
INLINE ILushort GetBigUShort() {
ILushort s;
iread(&s, sizeof(ILushort), 1);
#ifdef __LITTLE_ENDIAN__
iSwapUShort(&s);
#endif
return s;
}
INLINE ILshort GetBigShort() {
ILshort s;
iread(&s, sizeof(ILshort), 1);
#ifdef __LITTLE_ENDIAN__
iSwapShort(&s);
#endif
return s;
}
INLINE ILuint GetBigUInt() {
ILuint i;
iread(&i, sizeof(ILuint), 1);
#ifdef __LITTLE_ENDIAN__
iSwapUInt(&i);
#endif
return i;
}
INLINE ILint GetBigInt() {
ILint i;
iread(&i, sizeof(ILint), 1);
#ifdef __LITTLE_ENDIAN__
iSwapInt(&i);
#endif
return i;
}
INLINE ILfloat GetBigFloat() {
ILfloat f;
iread(&f, sizeof(ILfloat), 1);
#ifdef __LITTLE_ENDIAN__
iSwapFloat(&f);
#endif
return f;
}
INLINE ILdouble GetBigDouble() {
ILdouble d;
iread(&d, sizeof(ILdouble), 1);
#ifdef __LITTLE_ENDIAN__
iSwapDouble(&d);
#endif
return d;
}
INLINE ILubyte SaveLittleUShort(ILushort s) {
#ifdef __BIG_ENDIAN__
iSwapUShort(&s);
#endif
return iwrite(&s, sizeof(ILushort), 1);
}
INLINE ILubyte SaveLittleShort(ILshort s) {
#ifdef __BIG_ENDIAN__
iSwapShort(&s);
#endif
return iwrite(&s, sizeof(ILshort), 1);
}
INLINE ILubyte SaveLittleUInt(ILuint i) {
#ifdef __BIG_ENDIAN__
iSwapUInt(&i);
#endif
return iwrite(&i, sizeof(ILuint), 1);
}
INLINE ILubyte SaveLittleInt(ILint i) {
#ifdef __BIG_ENDIAN__
iSwapInt(&i);
#endif
return iwrite(&i, sizeof(ILint), 1);
}
INLINE ILubyte SaveLittleFloat(ILfloat f) {
#ifdef __BIG_ENDIAN__
iSwapFloat(&f);
#endif
return iwrite(&f, sizeof(ILfloat), 1);
}
INLINE ILubyte SaveLittleDouble(ILdouble d) {
#ifdef __BIG_ENDIAN__
iSwapDouble(&d);
#endif
return iwrite(&d, sizeof(ILdouble), 1);
}
INLINE ILubyte SaveBigUShort(ILushort s) {
#ifdef __LITTLE_ENDIAN__
iSwapUShort(&s);
#endif
return iwrite(&s, sizeof(ILushort), 1);
}
INLINE ILubyte SaveBigShort(ILshort s) {
#ifdef __LITTLE_ENDIAN__
iSwapShort(&s);
#endif
return iwrite(&s, sizeof(ILshort), 1);
}
INLINE ILubyte SaveBigUInt(ILuint i) {
#ifdef __LITTLE_ENDIAN__
iSwapUInt(&i);
#endif
return iwrite(&i, sizeof(ILuint), 1);
}
INLINE ILubyte SaveBigInt(ILint i) {
#ifdef __LITTLE_ENDIAN__
iSwapInt(&i);
#endif
return iwrite(&i, sizeof(ILint), 1);
}
INLINE ILubyte SaveBigFloat(ILfloat f) {
#ifdef __LITTLE_ENDIAN__
iSwapFloat(&f);
#endif
return iwrite(&f, sizeof(ILfloat), 1);
}
INLINE ILubyte SaveBigDouble(ILdouble d) {
#ifdef __LITTLE_ENDIAN__
iSwapDouble(&d);
#endif
return iwrite(&d, sizeof(ILdouble), 1);
}
#endif//NOINLINE
void EndianSwapData(void *_Image);
#endif//ENDIAN_H
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