diff options
Diffstat (limited to 'Utilities/cmlibrhash/librhash/byte_order.h')
-rw-r--r-- | Utilities/cmlibrhash/librhash/byte_order.h | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/Utilities/cmlibrhash/librhash/byte_order.h b/Utilities/cmlibrhash/librhash/byte_order.h new file mode 100644 index 0000000..77b8bb9 --- /dev/null +++ b/Utilities/cmlibrhash/librhash/byte_order.h @@ -0,0 +1,171 @@ +/* byte_order.h */ +#ifndef BYTE_ORDER_H +#define BYTE_ORDER_H +#include "ustd.h" +#include <stdlib.h> + +#ifdef IN_RHASH +#include "config.h" +#endif + +#ifdef __GLIBC__ +# include <endian.h> +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/* if x86 compatible cpu */ +#if defined(i386) || defined(__i386__) || defined(__i486__) || \ + defined(__i586__) || defined(__i686__) || defined(__pentium__) || \ + defined(__pentiumpro__) || defined(__pentium4__) || \ + defined(__nocona__) || defined(prescott) || defined(__core2__) || \ + defined(__k6__) || defined(__k8__) || defined(__athlon__) || \ + defined(__amd64) || defined(__amd64__) || \ + defined(__x86_64) || defined(__x86_64__) || defined(_M_IX86) || \ + defined(_M_AMD64) || defined(_M_IA64) || defined(_M_X64) +/* detect if x86-64 instruction set is supported */ +# if defined(_LP64) || defined(__LP64__) || defined(__x86_64) || \ + defined(__x86_64__) || defined(_M_AMD64) || defined(_M_X64) +# define CPU_X64 +# else +# define CPU_IA32 +# endif +#endif + + +/* detect CPU endianness */ +#if (defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && \ + __BYTE_ORDER == __LITTLE_ENDIAN) || \ + defined(CPU_IA32) || defined(CPU_X64) || \ + defined(__ia64) || defined(__ia64__) || defined(__alpha__) || defined(_M_ALPHA) || \ + defined(vax) || defined(MIPSEL) || defined(_ARM_) || defined(__arm__) +# define CPU_LITTLE_ENDIAN +# define IS_BIG_ENDIAN 0 +# define IS_LITTLE_ENDIAN 1 +#elif (defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && \ + __BYTE_ORDER == __BIG_ENDIAN) || \ + defined(__sparc) || defined(__sparc__) || defined(sparc) || \ + defined(_ARCH_PPC) || defined(_ARCH_PPC64) || defined(_POWER) || \ + defined(__POWERPC__) || defined(POWERPC) || defined(__powerpc) || \ + defined(__powerpc__) || defined(__powerpc64__) || defined(__ppc__) || \ + defined(__hpux) || defined(_MIPSEB) || defined(mc68000) || \ + defined(__s390__) || defined(__s390x__) || defined(sel) +# define CPU_BIG_ENDIAN +# define IS_BIG_ENDIAN 1 +# define IS_LITTLE_ENDIAN 0 +#else +# error "Can't detect CPU architechture" +#endif + +#define IS_ALIGNED_32(p) (0 == (3 & ((const char*)(p) - (const char*)0))) +#define IS_ALIGNED_64(p) (0 == (7 & ((const char*)(p) - (const char*)0))) + +#if defined(_MSC_VER) +#define ALIGN_ATTR(n) __declspec(align(n)) +#elif defined(__GNUC__) +#define ALIGN_ATTR(n) __attribute__((aligned (n))) +#else +#define ALIGN_ATTR(n) /* nothing */ +#endif + + +#if defined(_MSC_VER) || defined(__BORLANDC__) +#define I64(x) x##ui64 +#else +#define I64(x) x##LL +#endif + +/* convert a hash flag to index */ +#if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) /* GCC < 3.4 */ +# define rhash_ctz(x) __builtin_ctz(x) +#else +unsigned rhash_ctz(unsigned); /* define as function */ +#endif + +void rhash_swap_copy_str_to_u32(void* to, int index, const void* from, size_t length); +void rhash_swap_copy_str_to_u64(void* to, int index, const void* from, size_t length); +void rhash_swap_copy_u64_to_str(void* to, const void* from, size_t length); +void rhash_u32_mem_swap(unsigned *p, int length_in_u32); + +/* define bswap_32 */ +#if defined(__GNUC__) && defined(CPU_IA32) && !defined(__i386__) +/* for intel x86 CPU */ +static inline uint32_t bswap_32(uint32_t x) { + __asm("bswap\t%0" : "=r" (x) : "0" (x)); + return x; +} +#elif defined(__GNUC__) && (__GNUC__ >= 4) && (__GNUC__ > 4 || __GNUC_MINOR__ >= 3) +/* for GCC >= 4.3 */ +# define bswap_32(x) __builtin_bswap32(x) +#elif (_MSC_VER > 1300) && (defined(CPU_IA32) || defined(CPU_X64)) /* MS VC */ +# define bswap_32(x) _byteswap_ulong((unsigned long)x) +#elif !defined(__STRICT_ANSI__) +/* general bswap_32 definition */ +static inline uint32_t bswap_32(uint32_t x) { + x = ((x << 8) & 0xFF00FF00) | ((x >> 8) & 0x00FF00FF); + return (x >> 16) | (x << 16); +} +#else +#define bswap_32(x) ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \ + (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24)) +#endif /* bswap_32 */ + +#if defined(__GNUC__) && (__GNUC__ >= 4) && (__GNUC__ > 4 || __GNUC_MINOR__ >= 3) +# define bswap_64(x) __builtin_bswap64(x) +#elif (_MSC_VER > 1300) && (defined(CPU_IA32) || defined(CPU_X64)) /* MS VC */ +# define bswap_64(x) _byteswap_uint64((__int64)x) +#elif !defined(__STRICT_ANSI__) +static inline uint64_t bswap_64(uint64_t x) { + union { + uint64_t ll; + uint32_t l[2]; + } w, r; + w.ll = x; + r.l[0] = bswap_32(w.l[1]); + r.l[1] = bswap_32(w.l[0]); + return r.ll; +} +#else +#error "bswap_64 unsupported" +#endif + +#ifdef CPU_BIG_ENDIAN +# define be2me_32(x) (x) +# define be2me_64(x) (x) +# define le2me_32(x) bswap_32(x) +# define le2me_64(x) bswap_64(x) + +# define be32_copy(to, index, from, length) memcpy((to) + (index), (from), (length)) +# define le32_copy(to, index, from, length) rhash_swap_copy_str_to_u32((to), (index), (from), (length)) +# define be64_copy(to, index, from, length) memcpy((to) + (index), (from), (length)) +# define le64_copy(to, index, from, length) rhash_swap_copy_str_to_u64((to), (index), (from), (length)) +# define me64_to_be_str(to, from, length) memcpy((to), (from), (length)) +# define me64_to_le_str(to, from, length) rhash_swap_copy_u64_to_str((to), (from), (length)) + +#else /* CPU_BIG_ENDIAN */ +# define be2me_32(x) bswap_32(x) +# define be2me_64(x) bswap_64(x) +# define le2me_32(x) (x) +# define le2me_64(x) (x) + +# define be32_copy(to, index, from, length) rhash_swap_copy_str_to_u32((to), (index), (from), (length)) +# define le32_copy(to, index, from, length) memcpy((to) + (index), (from), (length)) +# define be64_copy(to, index, from, length) rhash_swap_copy_str_to_u64((to), (index), (from), (length)) +# define le64_copy(to, index, from, length) memcpy((to) + (index), (from), (length)) +# define me64_to_be_str(to, from, length) rhash_swap_copy_u64_to_str((to), (from), (length)) +# define me64_to_le_str(to, from, length) memcpy((to), (from), (length)) +#endif /* CPU_BIG_ENDIAN */ + +/* ROTL/ROTR macros rotate a 32/64-bit word left/right by n bits */ +#define ROTL32(dword, n) ((dword) << (n) ^ ((dword) >> (32 - (n)))) +#define ROTR32(dword, n) ((dword) >> (n) ^ ((dword) << (32 - (n)))) +#define ROTL64(qword, n) ((qword) << (n) ^ ((qword) >> (64 - (n)))) +#define ROTR64(qword, n) ((qword) >> (n) ^ ((qword) << (64 - (n)))) + +#ifdef __cplusplus +} /* extern "C" */ +#endif /* __cplusplus */ + +#endif /* BYTE_ORDER_H */ |