159 lines
3.2 KiB
C++
159 lines
3.2 KiB
C++
#ifndef __ENDIAN_H__
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#define __ENDIAN_H__
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// utlities to read/write bytes.
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#include <stdint.h>
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namespace LittleEndian {
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inline uint8_t Read8(const void *vp)
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{
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const uint8_t *p = (const uint8_t *)vp;
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return (p[0]);
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}
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uint16_t Read16(const void *vp);
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uint32_t Read24(const void *vp);
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uint32_t Read32(const void *vp);
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inline uint8_t Read8(const void *vp, unsigned offset)
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{
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return Read8(offset + (const uint8_t *)vp);
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}
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inline uint16_t Read16(const void *vp, unsigned offset)
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{
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return Read16(offset + (const uint8_t *)vp);
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}
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inline uint32_t Read24(const void *vp, unsigned offset)
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{
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return Read24(offset + (const uint8_t *)vp);
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}
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inline uint32_t Read32(const void *vp, unsigned offset)
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{
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return Read32(offset + (const uint8_t *)vp);
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}
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// write
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inline void Write8(void *vp, uint8_t x)
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{
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uint8_t *p = (uint8_t *)vp;
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p[0] = x;
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}
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void Write16(void *vp, uint16_t x);
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void Write24(void *vp, uint32_t x);
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void Write32(void *vp, uint32_t x);
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inline void Write8(void *vp, unsigned offset, uint8_t x)
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{
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Write8(offset + (uint8_t *)vp, x);
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}
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inline void Write16(void *vp, unsigned offset, uint16_t x)
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{
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Write16(offset + (uint8_t *)vp, x);
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}
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inline void Write24(void *vp, unsigned offset, uint32_t x)
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{
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Write24(offset + (uint8_t *)vp, x);
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}
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inline void Write32(void *vp, unsigned offset, uint32_t x)
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{
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Write32(offset + (uint8_t *)vp, x);
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}
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}
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namespace BigEndian {
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inline uint8_t Read8(const void *vp)
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{
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const uint8_t *p = (const uint8_t *)vp;
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return p[0];
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}
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uint16_t Read16(const void *vp);
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uint32_t Read24(const void *vp);
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uint32_t Read32(const void *vp);
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inline uint8_t Read8(const void *vp, unsigned offset)
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{
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return Read8(offset + (const uint8_t *)vp);
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}
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inline uint16_t Read16(const void *vp, unsigned offset)
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{
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return Read16(offset + (const uint8_t *)vp);
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}
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inline uint32_t Read24(const void *vp, unsigned offset)
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{
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return Read24(offset + (const uint8_t *)vp);
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}
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inline uint32_t Read32(const void *vp, unsigned offset)
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{
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return Read32(offset + (const uint8_t *)vp);
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}
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// write
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inline void Write8(void *vp, uint8_t x)
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{
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uint8_t *p = (uint8_t *)vp;
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p[0] = x;
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}
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void Write16(void *vp, uint16_t x);
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void Write24(void *vp, uint32_t x);
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void Write32(void *vp, uint32_t x);
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inline void Write8(void *vp, unsigned offset, uint8_t x)
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{
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Write8(offset + (uint8_t *)vp, x);
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}
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inline void Write16(void *vp, unsigned offset, uint16_t x)
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{
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Write16(offset + (uint8_t *)vp, x);
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}
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inline void Write24(void *vp, unsigned offset, uint32_t x)
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{
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Write24(offset + (uint8_t *)vp, x);
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}
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inline void Write32(void *vp, unsigned offset, uint32_t x)
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{
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Write32(offset + (uint8_t *)vp, x);
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}
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}
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#endif |