comparison: src/ucx/cx/hash_key.h
src/ucx/cx/hash_key.h
- changeset 416
- e2093ca0ef90
- parent 415
- d938228c382e
- child 438
- 22eca559aded
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replaced
| 415:d938228c382e | 416:e2093ca0ef90 |
|---|---|
| 48 struct cx_hash_key_s { | 48 struct cx_hash_key_s { |
| 49 /** The key data. */ | 49 /** The key data. */ |
| 50 union { | 50 union { |
| 51 unsigned char *bytes; | 51 unsigned char *bytes; |
| 52 unsigned char const *cbytes; | 52 unsigned char const *cbytes; |
| 53 char *str; | |
| 53 char const *cstr; | 54 char const *cstr; |
| 54 char *str; | |
| 55 void *obj; | 55 void *obj; |
| 56 void const *cobj; | |
| 56 } data; | 57 } data; |
| 57 /** | 58 /** |
| 58 * The key data length. | 59 * The key data length. |
| 59 */ | 60 */ |
| 60 size_t len; | 61 size_t len; |
| 66 * Type for a hash key. | 67 * Type for a hash key. |
| 67 */ | 68 */ |
| 68 typedef struct cx_hash_key_s CxHashKey; | 69 typedef struct cx_hash_key_s CxHashKey; |
| 69 | 70 |
| 70 /** | 71 /** |
| 71 * Computes a murmur hash-2. | 72 * Computes a murmur2 32 bit hash. |
| 72 * | 73 * |
| 73 * You need to initialize data and len in the key struct. | 74 * You need to initialize \c data and \c len in the key struct. |
| 74 * The hash is then directly written to that struct. | 75 * The hash is then directly written to that struct. |
| 76 * | |
| 77 * \note If \c data is \c NULL, the hash is defined as 1574210520. | |
| 75 * | 78 * |
| 76 * @param key the key, the hash shall be computed for | 79 * @param key the key, the hash shall be computed for |
| 77 */ | 80 */ |
| 78 void cx_hash_murmur(CxHashKey *key); | 81 void cx_hash_murmur(CxHashKey *key); |
| 79 | 82 |
| 112 * @param len the length of object in memory | 115 * @param len the length of object in memory |
| 113 * @return the hash key | 116 * @return the hash key |
| 114 */ | 117 */ |
| 115 __attribute__((__warn_unused_result__)) | 118 __attribute__((__warn_unused_result__)) |
| 116 CxHashKey cx_hash_key( | 119 CxHashKey cx_hash_key( |
| 117 void *obj, | 120 void const *obj, |
| 118 size_t len | 121 size_t len |
| 119 ); | 122 ); |
| 120 | 123 |
| 121 #ifdef __cplusplus | 124 #ifdef __cplusplus |
| 122 } // extern "C" | 125 } // extern "C" |
