diff options
Diffstat (limited to 'strings/strings_def.h')
| -rw-r--r-- | strings/strings_def.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/strings/strings_def.h b/strings/strings_def.h index 6bd8e8f5575..fb280b6bb6b 100644 --- a/strings/strings_def.h +++ b/strings/strings_def.h @@ -100,4 +100,13 @@ static inline const uchar *skip_trailing_space(const uchar *ptr,size_t len) end--; return (end); } + +/* Macros for hashing characters */ + +#define MY_HASH_ADD(A, B, value) \ + do { A^= (((A & 63)+B)*((value)))+ (A << 8); B+=3; } while(0) + +#define MY_HASH_ADD_16(A, B, value) \ + do { MY_HASH_ADD(A, B, ((value) & 0xFF)) ; MY_HASH_ADD(A, B, ((value >>8 ))); } while(0) + #endif |