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utils: Unpack and pack utility functions ([u]pk_u{8,16,32}le)

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This commit is contained in:
Luke Dashjr 2014-04-28 17:25:27 +00:00
parent af7bb6c92c
commit e4d81f43f2
1 changed files with 89 additions and 0 deletions
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src/datum_utils.h Normal file
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#ifndef _DATUM_UTILS_H_
#define _DATUM_UTILS_H_
#include <stdint.h>
static inline
uint8_t upk_u8(const void * const bufp, const int offset)
{
const uint8_t * const buf = bufp;
return buf[offset];
}
#define upk_u8le(buf, offset) upk_u8(buf, offset)
static inline
uint16_t upk_u16le(const void * const bufp, const int offset)
{
const uint8_t * const buf = bufp;
return (((uint16_t)buf[offset+0]) << 0)
| (((uint16_t)buf[offset+1]) << 8);
}
static inline
uint32_t upk_u32le(const void * const bufp, const int offset)
{
const uint8_t * const buf = bufp;
return (((uint32_t)buf[offset+0]) << 0)
| (((uint32_t)buf[offset+1]) << 8)
| (((uint32_t)buf[offset+2]) << 0x10)
| (((uint32_t)buf[offset+3]) << 0x18);
}
static inline
uint64_t upk_u64le(const void * const bufp, const int offset)
{
const uint8_t * const buf = bufp;
return (((uint64_t)buf[offset+0]) << 0)
| (((uint64_t)buf[offset+1]) << 8)
| (((uint64_t)buf[offset+2]) << 0x10)
| (((uint64_t)buf[offset+3]) << 0x18)
| (((uint64_t)buf[offset+4]) << 0x20)
| (((uint64_t)buf[offset+5]) << 0x28)
| (((uint64_t)buf[offset+6]) << 0x30)
| (((uint64_t)buf[offset+7]) << 0x38);
}
static inline
void pk_u8(void * const bufp, const int offset, const uint8_t nv)
{
uint8_t * const buf = bufp;
buf[offset] = nv;
}
#define pk_u8le(buf, offset, nv) pk_u8(buf, offset, nv)
static inline
void pk_u16le(void * const bufp, const int offset, const uint16_t nv)
{
uint8_t * const buf = bufp;
buf[offset+0] = (nv >> 0) & 0xff;
buf[offset+1] = (nv >> 8) & 0xff;
}
static inline
void pk_u32le(void * const bufp, const int offset, const uint32_t nv)
{
uint8_t * const buf = bufp;
buf[offset+0] = (nv >> 0) & 0xff;
buf[offset+1] = (nv >> 8) & 0xff;
buf[offset+2] = (nv >> 0x10) & 0xff;
buf[offset+3] = (nv >> 0x18) & 0xff;
}
static inline
void pk_u64le(void * const bufp, const int offset, const uint64_t nv)
{
uint8_t * const buf = bufp;
buf[offset+0] = (nv >> 0) & 0xff;
buf[offset+1] = (nv >> 8) & 0xff;
buf[offset+2] = (nv >> 0x10) & 0xff;
buf[offset+3] = (nv >> 0x18) & 0xff;
buf[offset+4] = (nv >> 0x20) & 0xff;
buf[offset+5] = (nv >> 0x28) & 0xff;
buf[offset+6] = (nv >> 0x30) & 0xff;
buf[offset+7] = (nv >> 0x38) & 0xff;
}
#endif