147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
/* this header file comes from libowfat, http://www.fefe.de/libowfat/ */
|
|
#ifndef UINT16_H
|
|
#define UINT16_H
|
|
|
|
#include <inttypes.h> // uint16_t, int16_t
|
|
#include <stddef.h> // size_t
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
typedef uint16_t uint16;
|
|
typedef int16_t int16;
|
|
|
|
#if (defined(__i386__) || defined(__x86_64__)) && !defined(NO_UINT16_MACROS)
|
|
|
|
/* On x86 and x64 unaligned access are OK and the compiler knows it and
|
|
* will collapse this long-looking code into a single load or store
|
|
* instruction, so turn it into inline functions */
|
|
|
|
static inline void uint16_pack(char* out,uint16 in) {
|
|
out[0]=in;
|
|
out[1]=in>>8;
|
|
}
|
|
|
|
static inline void uint16_unpack(const char *in,uint16* out) {
|
|
const unsigned char* i = (const unsigned char*)in;
|
|
*out=i[0] | (i[1]<<8);
|
|
}
|
|
|
|
static inline uint16 uint16_read(const char* in) {
|
|
const unsigned char* i = (const unsigned char*)in;
|
|
return i[0] | (i[1]<<8);
|
|
}
|
|
|
|
static inline void uint16_pack_big(char* out,uint16 in) {
|
|
out[0]=in>>8;
|
|
out[1]=in;
|
|
}
|
|
|
|
static inline void uint16_unpack_big(const char *in,uint16* out) {
|
|
const unsigned char* i = (const unsigned char*)in;
|
|
*out=(i[0]<<8) | i[1];
|
|
}
|
|
|
|
static inline uint16 uint16_read_big(const char* in) {
|
|
const unsigned char* i = (const unsigned char*)in;
|
|
return (i[0]<<8) | i[1];
|
|
}
|
|
|
|
#else
|
|
|
|
void uint16_pack(char out[2],uint16 in);
|
|
void uint16_pack_big(char out[2],uint16 in);
|
|
void uint16_unpack(const char in[2],uint16* out);
|
|
void uint16_unpack_big(const char in[2],uint16* out);
|
|
uint16 uint16_read(const char in[2]);
|
|
uint16 uint16_read_big(const char in[2]);
|
|
|
|
#endif
|
|
|
|
static inline size_t fmt_uint16(char out[2], uint16 in) {
|
|
if (out) uint16_pack(out,in);
|
|
return 2;
|
|
}
|
|
|
|
static inline size_t fmt_uint16_big(char out[2], uint16 in) {
|
|
if (out) uint16_pack_big(out,in);
|
|
return 2;
|
|
}
|
|
|
|
static inline size_t scan_uint16(const char in[2], size_t len, uint16_t* b) {
|
|
if (len<2) return 0;
|
|
*b = uint16_read(in);
|
|
return 2;
|
|
}
|
|
|
|
static inline size_t scan_uint16_big(const char in[2], size_t len, uint16_t* b) {
|
|
if (len<2) return 0;
|
|
*b = uint16_read_big(in);
|
|
return 2;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
|
|
inline void uint16_pack(unsigned char out[2],uint16 in) {
|
|
uint16_pack(reinterpret_cast<char*>(out), in);
|
|
}
|
|
|
|
inline void uint16_pack_big(unsigned char out[2],uint16 in) {
|
|
uint16_pack_big(reinterpret_cast<char*>(out), in);
|
|
}
|
|
|
|
inline void uint16_unpack(const unsigned char in[2],uint16* out) {
|
|
uint16_unpack(reinterpret_cast<const char*>(in), out);
|
|
}
|
|
|
|
inline void uint16_unpack_big(const unsigned char in[2],uint16* out) {
|
|
uint16_unpack_big(reinterpret_cast<const char*>(in), out);
|
|
}
|
|
|
|
inline void uint16_pack(uint16* out,uint16 in) {
|
|
uint16_pack(reinterpret_cast<char*>(out), in);
|
|
}
|
|
|
|
inline void uint16_pack_big(uint16* out,uint16 in) {
|
|
uint16_pack_big(reinterpret_cast<char*>(out), in);
|
|
}
|
|
|
|
inline void uint16_unpack(uint16* *in,uint16* out) {
|
|
uint16_unpack(reinterpret_cast<const char*>(in), out);
|
|
}
|
|
|
|
inline void uint16_unpack_big(uint16* *in,uint16* out) {
|
|
uint16_unpack_big(reinterpret_cast<const char*>(in), out);
|
|
}
|
|
|
|
inline uint16 uint16_read(const unsigned char in[2]) {
|
|
return uint16_read(reinterpret_cast<const char*>(in));
|
|
}
|
|
|
|
inline uint16 uint16_read_big(const unsigned char in[2]) {
|
|
return uint16_read_big(reinterpret_cast<const char*>(in));
|
|
}
|
|
|
|
inline uint16 uint16_read(const uint16 *in) {
|
|
return uint16_read(reinterpret_cast<const char*>(in));
|
|
}
|
|
|
|
inline uint16 uint16_read_big(const uint16 *in) {
|
|
return uint16_read_big(reinterpret_cast<const char*>(in));
|
|
}
|
|
|
|
inline uint16 uint_read(const uint16* in) {
|
|
return uint16_read(reinterpret_cast<const char*>(in));
|
|
}
|
|
|
|
inline uint16 uint_read_big(const uint16* in) {
|
|
return uint16_read_big(reinterpret_cast<const char*>(in));
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
#endif
|