149 lines
3.8 KiB
C
149 lines
3.8 KiB
C
/* this header file comes from libowfat, http://www.fefe.de/libowfat/ */
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#ifndef UINT32_H
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#define UINT32_H
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#include <inttypes.h> /* uint32_t, int32_t */
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#include <stddef.h> /* size_t */
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef uint32_t uint32;
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typedef int32_t int32;
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#if (defined(__i386__) || defined(__x86_64__)) && !defined(NO_UINT32_MACROS)
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/* On x86 and x64 unaligned access are OK and the compiler knows it and
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* will collapse this long-looking code into a single load or store
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* instruction, so turn it into inline functions */
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static inline void uint32_pack(char out[4],uint32 in) {
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out[0]=in;
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out[1]=in>>8;
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out[2]=in>>16;
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out[3]=in>>24;
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}
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static inline void uint32_unpack(const char in[4],uint32* out) {
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const unsigned char* i = (const unsigned char*)in;
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*out=i[0] | (i[1]<<8) | (i[2]<<16) | (i[3]<<24);
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}
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static inline uint32 uint32_read(const char in[4]) {
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const unsigned char* i = (const unsigned char*)in;
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return i[0] | (i[1]<<8) | (i[2]<<16) | (i[3]<<24);
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}
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static inline void uint32_pack_big(char out[4],uint32 in) {
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out[0]=in>>24;
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out[1]=in>>16;
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out[2]=in>>8;
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out[3]=in;
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}
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static inline void uint32_unpack_big(const char in[4],uint32* out) {
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const unsigned char* i = (const unsigned char*)in;
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*out=(i[0]<<24) | (i[1]<<16) | (i[2]<<8) | i[3];
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}
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static inline uint32 uint32_read_big(const char in[4]) {
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const unsigned char* i = (const unsigned char*)in;
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return (i[0]<<24) | (i[1]<<16) | (i[2]<<8) | i[3];
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}
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#else
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void uint32_pack(char out[4],uint32 in);
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void uint32_pack_big(char out[4],uint32 in);
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void uint32_unpack(const char in[4],uint32* out);
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void uint32_unpack_big(const char in[4],uint32* out);
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uint32 uint32_read(const char in[4]);
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uint32 uint32_read_big(const char in[4]);
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#endif
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static inline size_t fmt_uint32(char out[4], uint32 in) {
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if (out) uint32_pack(out,in);
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return 4;
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}
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static inline size_t fmt_uint32_big(char out[4], uint32 in) {
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if (out) uint32_pack_big(out,in);
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return 4;
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}
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static inline size_t scan_uint32(const char in[4], size_t len, uint32_t* b) {
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if (len<4) return 0;
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*b = uint32_read(in);
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return 4;
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}
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static inline size_t scan_uint32_big(const char in[4], size_t len, uint32_t* b) {
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if (len<4) return 0;
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*b = uint32_read_big(in);
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return 4;
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}
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#ifdef __cplusplus
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}
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inline void uint32_pack(unsigned char out[4],uint32 in) {
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uint32_pack(reinterpret_cast<char*>(out), in);
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}
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inline void uint32_pack_big(unsigned char out[4],uint32 in) {
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uint32_pack_big(reinterpret_cast<char*>(out), in);
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}
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inline void uint32_unpack(const unsigned char in[4],uint32* out) {
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uint32_unpack(reinterpret_cast<const char*>(in), out);
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}
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inline void uint32_unpack_big(const unsigned char in[4],uint32* out) {
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uint32_unpack_big(reinterpret_cast<const char*>(in), out);
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}
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inline void uint32_pack(uint32* out,uint32 in) {
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uint32_pack(reinterpret_cast<char*>(out), in);
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}
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inline void uint32_pack_big(uint32* out,uint32 in) {
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uint32_pack_big(reinterpret_cast<char*>(out), in);
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}
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inline void uint32_unpack(uint32* *in,uint32* out) {
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uint32_unpack(reinterpret_cast<const char*>(in), out);
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}
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inline void uint32_unpack_big(uint32* *in,uint32* out) {
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uint32_unpack_big(reinterpret_cast<const char*>(in), out);
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}
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inline uint32 uint32_read(const unsigned char in[4]) {
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return uint32_read(reinterpret_cast<const char*>(in));
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}
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inline uint32 uint32_read_big(const unsigned char in[4]) {
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return uint32_read_big(reinterpret_cast<const char*>(in));
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}
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inline uint32 uint32_read(const uint32 *in) {
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return uint32_read(reinterpret_cast<const char*>(in));
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}
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inline uint32 uint32_read_big(const uint32 *in) {
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return uint32_read_big(reinterpret_cast<const char*>(in));
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}
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inline uint32 uint_read(const uint32* in) {
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return uint32_read(reinterpret_cast<const char*>(in));
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}
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inline uint32 uint_read_big(const uint32* in) {
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return uint32_read_big(reinterpret_cast<const char*>(in));
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}
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#endif
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#endif
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