| /*----------------------------------------------------------------------------- |
| * MurmurHash3 was written by Austin Appleby, and is placed in the public |
| * domain. |
| * |
| * This implementation was written by Shane Day, and is also public domain. |
| * |
| * This is a portable ANSI C implementation of MurmurHash3_x86_32 (Murmur3A) |
| * with support for progressive processing. |
| */ |
| |
| /* ------------------------------------------------------------------------- */ |
| /* Determine what native type to use for uint32_t */ |
| |
| /* We can't use the name 'uint32_t' here because it will conflict with |
| * any version provided by the system headers or application. */ |
| |
| /* First look for special cases */ |
| #if defined(_MSC_VER) |
| #define MH_UINT32 unsigned long |
| #endif |
| |
| /* If the compiler says it's C99 then take its word for it */ |
| #if !defined(MH_UINT32) && ( \ |
| defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L ) |
| #include <stdint.h> |
| #define MH_UINT32 uint32_t |
| #endif |
| |
| /* Otherwise try testing against max value macros from limit.h */ |
| #if !defined(MH_UINT32) |
| #include <limits.h> |
| #if (USHRT_MAX == 0xffffffffUL) |
| #define MH_UINT32 unsigned short |
| #elif (UINT_MAX == 0xffffffffUL) |
| #define MH_UINT32 unsigned int |
| #elif (ULONG_MAX == 0xffffffffUL) |
| #define MH_UINT32 unsigned long |
| #endif |
| #endif |
| |
| #if !defined(MH_UINT32) |
| #error Unable to determine type name for unsigned 32-bit int |
| #endif |
| |
| /* I'm yet to work on a platform where 'unsigned char' is not 8 bits */ |
| #define MH_UINT8 unsigned char |
| |
| |
| /* ------------------------------------------------------------------------- */ |
| /* Prototypes */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| void PMurHash32_Process(MH_UINT32 *ph1, MH_UINT32 *pcarry, const void *key, int len); |
| MH_UINT32 PMurHash32_Result(MH_UINT32 h1, MH_UINT32 carry, MH_UINT32 total_length); |
| MH_UINT32 PMurHash32(MH_UINT32 seed, const void *key, int len); |
| |
| void PMurHash32_test(const void *key, int len, MH_UINT32 seed, void *out); |
| |
| #ifdef __cplusplus |
| } |
| #endif |