diff options
Diffstat (limited to 'mysys/hash.c')
| -rw-r--r-- | mysys/hash.c | 59 |
1 files changed, 53 insertions, 6 deletions
diff --git a/mysys/hash.c b/mysys/hash.c index 3a9f05a3e0b..0d3f79bc40f 100644 --- a/mysys/hash.c +++ b/mysys/hash.c @@ -304,7 +304,13 @@ static int hashcmp(const HASH *hash, HASH_LINK *pos, const uchar *key, } - /* Write a hash-key to the hash-index */ +/** + Write a hash-key to the hash-index + + @return + @retval 0 ok + @retval 1 Duplicate key or out of memory +*/ my_bool my_hash_insert(HASH *info,const uchar *record) { @@ -443,11 +449,21 @@ my_bool my_hash_insert(HASH *info,const uchar *record) } -/****************************************************************************** -** Remove one record from hash-table. The record with the same record -** ptr is removed. -** if there is a free-function it's called for record if found -******************************************************************************/ +/** + Remove one record from hash-table. + + @fn hash_delete() + @param hash Hash tree + @param record Row to be deleted + + @notes + The record with the same record ptr is removed. + If there is a free-function it's called if record was found. + + @return + @retval 0 ok + @retval 1 Record not found +*/ my_bool hash_delete(HASH *hash,uchar *record) { @@ -656,6 +672,37 @@ void hash_replace(HASH *hash, HASH_SEARCH_STATE *current_record, uchar *new_row) } +/** + Iterate over all elements in hash and call function with the element + + @param hash hash array + @param action function to call for each argument + @param argument second argument for call to action + + @notes + If one of functions calls returns 1 then the iteration aborts + + @retval 0 ok + @retval 1 iteration aborted becasue action returned 1 +*/ + +my_bool hash_iterate(HASH *hash, hash_walk_action action, void *argument) +{ + uint records, i; + HASH_LINK *data; + + records= hash->records; + data= dynamic_element(&hash->array,0,HASH_LINK*); + + for (i= 0 ; i < records ; i++) + { + if ((*action)(data[i].data, argument)) + return 1; + } + return 0; +} + + #ifndef DBUG_OFF my_bool hash_check(HASH *hash) |