X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=ucw%2Fhashfunc.h;h=8d198e1bd6e0cb875fd2aa69c59cb4988b5e4d29;hb=959566090f98dd31eaa67d3d5959b641e5fe902b;hp=b2b03e941a3e1c139f7d8e2b4cb85aed3d63a928;hpb=a4f8b029b86d2ca1612a9c2e2795ccea27b15276;p=libucw.git diff --git a/ucw/hashfunc.h b/ucw/hashfunc.h index b2b03e94..8d198e1b 100644 --- a/ucw/hashfunc.h +++ b/ucw/hashfunc.h @@ -25,10 +25,10 @@ /*** === String hashes [[strhash]] ***/ -/* The following functions need str to be aligned to sizeof(uns). */ -uns str_len_aligned(const char *str) PURE; /** Get the string length (not a really useful hash function, but there is no better place for it). The string must be aligned to sizeof(uns). For unaligned see @str_len(). **/ -uns hash_string_aligned(const char *str) PURE; /** Hash the string. The string must be aligned to sizeof(uns). For unaligned see @hash_string(). **/ -uns hash_block_aligned(const byte *buf, uns len) PURE; /** Hash arbitrary data. They must be aligned to sizeof(uns). For unaligned see @hash_block(). **/ +/* The following functions need str to be aligned to sizeof(uint). */ +uint str_len_aligned(const char *str) PURE; /** Get the string length (not a really useful hash function, but there is no better place for it). The string must be aligned to sizeof(uint). For unaligned see @str_len(). **/ +uint hash_string_aligned(const char *str) PURE; /** Hash the string. The string must be aligned to sizeof(uint). For unaligned see @hash_string(). **/ +uint hash_block_aligned(const byte *buf, uint len) PURE; /** Hash arbitrary data. They must be aligned to sizeof(uint). For unaligned see @hash_block(). **/ #ifdef CPU_ALLOW_UNALIGNED #undef str_len @@ -38,12 +38,12 @@ uns hash_block_aligned(const byte *buf, uns len) PURE; /** Hash arbitrary data. #define hash_string(str) hash_string_aligned(str) #define hash_block(str, len) hash_block_aligned(str, len) #else -uns str_len(const char *str) PURE; /** Get the string length. If you know it is aligned to sizeof(uns), you can use faster @str_len_aligned(). **/ -uns hash_string(const char *str) PURE; /** Hash the string. If it is aligned to sizeof(uns), you can use faster @hash_string_aligned(). **/ -uns hash_block(const byte *buf, uns len) PURE; /** Hash arbitrary data. If they are aligned to sizeof(uns), use faster @hash_block_aligned(). **/ +uint str_len(const char *str) PURE; /** Get the string length. If you know it is aligned to sizeof(uint), you can use faster @str_len_aligned(). **/ +uint hash_string(const char *str) PURE; /** Hash the string. If it is aligned to sizeof(uint), you can use faster @hash_string_aligned(). **/ +uint hash_block(const byte *buf, uint len) PURE; /** Hash arbitrary data. If they are aligned to sizeof(uint), use faster @hash_block_aligned(). **/ #endif -uns hash_string_nocase(const char *str) PURE; /** Hash the string in a case insensitive way. Works only with ASCII characters. **/ +uint hash_string_nocase(const char *str) PURE; /** Hash the string in a case insensitive way. Works only with ASCII characters. **/ /*** === Integer hashes [[inthash]] ***/ @@ -53,8 +53,8 @@ uns hash_string_nocase(const char *str) PURE; /** Hash the string in a case inse * of using shifts and adds on architectures where multiplication * instructions are slow). */ -static inline uns CONST hash_u32(uns x) { return 0x01008041*x; } /** Hash a 32 bit unsigned integer. **/ -static inline uns CONST hash_u64(u64 x) { return hash_u32((uns)x ^ (uns)(x >> 32)); } /** Hash a 64 bit unsigned integer. **/ -static inline uns CONST hash_pointer(void *x) { return ((sizeof(x) <= 4) ? hash_u32((uns)(uintptr_t)x) : hash_u64((u64)(uintptr_t)x)); } /** Hash a pointer. **/ +static inline uint CONST hash_u32(uint x) { return 0x01008041*x; } /** Hash a 32 bit unsigned integer. **/ +static inline uint CONST hash_u64(u64 x) { return hash_u32((uint)x ^ (uint)(x >> 32)); } /** Hash a 64 bit unsigned integer. **/ +static inline uint CONST hash_pointer(void *x) { return ((sizeof(x) <= 4) ? hash_u32((uint)(uintptr_t)x) : hash_u64((u64)(uintptr_t)x)); } /** Hash a pointer. **/ #endif