/
ints.h
88 lines (72 loc) · 1.68 KB
/
ints.h
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#ifndef _INTS_H_
#define _INTS_H_
#include <sys/types.h>
#include <string.h>
#ifdef HAVE_STDINT
#include <stdint.h>
#elif VISUALC
typedef __int8 int8_t;
typedef unsigned __int8 uint8_t;
typedef __int16 int16_t;
typedef unsigned __int16 uint16_t;
typedef __int32 int32_t;
typedef unsigned __int32 uint32_t;
typedef __int64 int64_t;
typedef unsigned __int64 uint64_t;
#else
#error "Need integer types."
#endif
//FIXME: these should care about endian-ness
inline void set_uint8(uint8_t *buf, size_t poffset, uint8_t value)
{
buf[poffset] = value;
}
inline uint8_t get_uint8(const uint8_t *buf, size_t poffset)
{
return buf[poffset];
}
inline void set_uint16(uint8_t *buf, size_t poffset, uint16_t value)
{
memcpy(buf + poffset, &value, sizeof(value));
}
inline uint16_t get_uint16(const uint8_t *buf, size_t poffset)
{
uint16_t value;
memcpy(&value, buf + poffset, sizeof(value));
return value;
}
inline void set_uint32(uint8_t *buf, size_t poffset, uint32_t value)
{
memcpy(buf + poffset, &value, sizeof(value));
}
inline uint32_t get_uint32(const uint8_t *buf, size_t poffset)
{
uint32_t value;
memcpy(&value, buf + poffset, sizeof(value));
return value;
}
inline void set_uint64(uint8_t *buf, size_t poffset, uint64_t value)
{
memcpy(buf + poffset, &value, sizeof(value));
}
inline uint64_t get_uint64(const uint8_t *buf, size_t poffset)
{
uint64_t value;
memcpy(&value, buf + poffset, sizeof(value));
return value;
}
inline int log2(uint32_t num)
{
int power = 31;
while (num && !(num & 0x80000000))
{
num <<= 1;
power--;
}
return power;
}
inline uint32_t pow2(int exp)
{
return 1 << exp;
}
#endif