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https://github.com/dborth/fceugx.git
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110 lines
2.8 KiB
C++
110 lines
2.8 KiB
C++
#ifndef __FCEU_ENDIAN
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#define __FCEU_ENDIAN
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#include <iosfwd>
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#include <stdio.h>
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#include "../emufile.h"
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#include "../types.h"
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inline uint64 double_to_u64(double d) {
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union {
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uint64 a;
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double b;
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} fuxor;
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fuxor.b = d;
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return fuxor.a;
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}
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inline double u64_to_double(uint64 u) {
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union {
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uint64 a;
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double b;
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} fuxor;
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fuxor.a = u;
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return fuxor.b;
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}
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inline uint32 float_to_u32(float f) {
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union {
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uint32 a;
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float b;
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} fuxor;
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fuxor.b = f;
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return fuxor.a;
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}
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inline float u32_to_float(uint32 u) {
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union {
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uint32 a;
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float b;
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} fuxor;
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fuxor.a = u;
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return fuxor.b;
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}
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int write16le(uint16 b, FILE *fp);
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int write32le(uint32 b, FILE *fp);
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int write32le(uint32 b, std::ostream* os);
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int write64le(uint64 b, std::ostream* os);
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int read64le(uint64 *Bufo, std::istream *is);
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int read32le(uint32 *Bufo, std::istream *is);
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int read32le(uint32 *Bufo, FILE *fp);
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int read16le(uint16 *Bufo, std::istream *is);
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void FlipByteOrder(uint8 *src, uint32 count);
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void FCEU_en32lsb(uint8 *, uint32);
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void FCEU_en16lsb(uint8* buf, uint16 val);
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uint64 FCEU_de64lsb(uint8 *morp);
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uint32 FCEU_de32lsb(uint8 *morp);
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uint16 FCEU_de16lsb(uint8 *morp);
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//well. just for the sake of consistency
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int write8le(uint8 b, EMUFILE *fp);
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inline int write8le(uint8* b, EMUFILE *fp) { return write8le(*b,fp); }
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int write16le(uint16 b, EMUFILE* os);
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int write32le(uint32 b, EMUFILE* os);
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int write64le(uint64 b, EMUFILE* os);
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inline int write_double_le(double b, EMUFILE*is) { uint64 temp = double_to_u64(b); int ret = write64le(temp,is); return ret; }
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int read8le(uint8 *Bufo, EMUFILE*is);
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int read16le(uint16 *Bufo, EMUFILE*is);
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inline int read16le(int16 *Bufo, EMUFILE*is) { return read16le((u16*)Bufo,is); }
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int read32le(uint32 *Bufo, EMUFILE*is);
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inline int read32le(int32 *Bufo, EMUFILE*is) { return read32le((u32*)Bufo,is); }
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int read64le(uint64 *Bufo, EMUFILE*is);
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inline int read_double_le(double *Bufo, EMUFILE*is) { uint64 temp; int ret = read64le(&temp,is); *Bufo = u64_to_double(temp); return ret; }
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template<typename T>
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int readle(T *Bufo, EMUFILE*is)
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{
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CTASSERT(sizeof(T)==1||sizeof(T)==2||sizeof(T)==4||sizeof(T)==8);
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switch(sizeof(T)) {
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case 1: return read8le((u8*)Bufo,is);
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case 2: return read16le((u16*)Bufo,is);
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case 4: return read32le((u32*)Bufo,is);
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case 8: return read64le((u64*)Bufo,is);
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default:
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return 0;
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}
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}
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template<typename T>
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int writele(T *Bufo, EMUFILE*os)
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{
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CTASSERT(sizeof(T)==1||sizeof(T)==2||sizeof(T)==4||sizeof(T)==8);
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switch(sizeof(T)) {
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case 1: return write8le((u8*)Bufo,os);
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case 2: return write16le((u16*)Bufo,os);
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case 4: return write32le((u32*)Bufo,os);
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case 8: return write64le((u64*)Bufo,os);
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default:
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return 0;
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}
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}
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#endif //__FCEU_ENDIAN
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