Hton

使用C++的模板、自动类型推导技术 #ifndef HtoN_h #define HtoN_h #include <arpa/inet.h> #if __ANDROID__ #ifndef htonll #define htonll(x) htonq(x) #endif #ifndef ntohll #define ntohll(x) ntohq(x) #endif #endif namespace zxszl { template <typename T> T zl_hton (T t) { return t;} template <> inline uint16_t zl_hton<uint16_t> (uint16_t t) { return htons(t); } template <> inline int16_t zl_hton<int16_t> (int16_t t) { return htons(t); } template <> inline uint32_t zl_hton<uint32_t> (uint32_t t) { return htonl(t); } template <> inline int32_t zl_hton<int32_t> (int32_t t) { return htonl(t); } template <> inline uint64_t zl_hton<uint64_t> (uint64_t t) { return htonll(t); } template <> inline int64_t zl_hton<int64_t> (int64_t t) { return htonll(t); } template <typename T> T zl_ntoh (T t) { return t;} template <> inline uint16_t zl_ntoh<uint16_t> (uint16_t t) { return ntohs(t); } template <> inline int16_t zl_ntoh<int16_t> (int16_t t) { return ntohs(t); } template <> inline uint32_t zl_ntoh<uint32_t> (uint32_t t) { return ntohl(t); } template <> inline int32_t zl_ntoh<int32_t> (int32_t t) { return ntohl(t); } template <> inline uint64_t zl_ntoh<uint64_t> (uint64_t t) { return ntohll(t); } template <> inline int64_t zl_ntoh<int64_t> (int64_t t) { return ntohll(t); } class __judge_little_endian { public: static inline bool isle() { static const int _a = 0xAABBCCDD; return *(unsigned char *)(&_a) == 0xDD;} }; #define zl_rorder_s(x) \ ((__uint16_t)((((__uint16_t)(x) & 0xff00) >> 8) | \ (((__uint16_t)(x) & 0x00ff) << 8))) #define zl_rorder_l(x) \ ((__uint32_t)((((__uint32_t)(x) & 0xff000000) >> 24) | \ (((__uint32_t)(x) & 0x00ff0000) >> 8) | \ (((__uint32_t)(x) & 0x0000ff00) << 8) | \ (((__uint32_t)(x) & 0x000000ff) << 24))) #define zl_rorder_ll(x) \ ((__uint64_t)((((__uint64_t)(x) & 0xff00000000000000ULL) >> 56) | \ (((__uint64_t)(x) & 0x00ff000000000000ULL) >> 40) | \ (((__uint64_t)(x) & 0x0000ff0000000000ULL) >> 24) | \ (((__uint64_t)(x) & 0x000000ff00000000ULL) >> 8) | \ (((__uint64_t)(x) & 0x00000000ff000000ULL) << 8) | \ (((__uint64_t)(x) & 0x0000000000ff0000ULL) << 24) | \ (((__uint64_t)(x) & 0x000000000000ff00ULL) << 40) | \ (((__uint64_t)(x) & 0x00000000000000ffULL) << 56))) template <typename T> T zl_htole (T t) { return t;} template <> inline uint16_t zl_htole<uint16_t> (uint16_t t) {return __judge_little_endian::isle() ? t : zl_rorder_s(t);} template <> inline int16_t zl_htole<int16_t> (int16_t t) {return __judge_little_endian::isle() ? t : zl_rorder_s(t);} template <> inline uint32_t zl_htole<uint32_t> (uint32_t t) {return __judge_little_endian::isle() ? t : zl_rorder_l(t);} template <> inline int32_t zl_htole<int32_t> (int32_t t) {return __judge_little_endian::isle() ? t : zl_rorder_l(t);} template <> inline uint64_t zl_htole<uint64_t> (uint64_t t) { return __judge_little_endian::isle() ? t : zl_rorder_ll(t); } template <> inline int64_t zl_htole<int64_t> (int64_t t) { return __judge_little_endian::isle() ? t : zl_rorder_ll(t); } template <typename T> T zl_letoh (T t) { return t;} template <> inline uint16_t zl_letoh<uint16_t> (uint16_t t) {return __judge_little_endian::isle() ? t : zl_rorder_s(t);} template <> inline int16_t zl_letoh<int16_t> (int16_t t) {return __judge_little_endian::isle() ? t : zl_rorder_s(t);} template <> inline uint32_t zl_letoh<uint32_t> (uint32_t t) {return __judge_little_endian::isle() ? t : zl_rorder_l(t);} template <> inline int32_t zl_letoh<int32_t> (int32_t t) {return __judge_little_endian::isle() ? t : zl_rorder_l(t);} template <> inline uint64_t zl_letoh<uint64_t> (uint64_t t) { return __judge_little_endian::isle() ? t : zl_rorder_ll(t); } template <> inline int64_t zl_letoh<int64_t> (int64_t t) { return __judge_little_endian::isle() ? t : zl_rorder_ll(t); } #undef zl_rorder_s #undef zl_rorder_l #undef zl_rorder_ll } #endif /* HtoN_h */ 使用示例 ...