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Modules: dictionary API WIP #9: iterator returning string object.

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antirez 2018-09-25 16:49:46 +02:00
parent fb1d5717de
commit 3ff82790e1
1 changed files with 23 additions and 6 deletions
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29
src/module.c
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@ -4544,12 +4544,29 @@ void *RM_DictPrevC(RedisModuleDictIter *di, size_t *keylen, void **dataptr) {
return di->ri.key;
}
/* TODO
RM_DictNextC();
RM_DictPrevC();
RM_DictNext();
RM_DictPrev();
*/
/* Like RedisModuleNextC(), but instead of returning an internally allocated
* buffer and key length, it returns directly a module string object allocated
* in the specified context 'ctx' (that may be NULL exactly like for the main
* API RedisModule_CreateString).
*
* The returned string object should be deallocated after use, either manually
* or by using a context that has automatic memory management active. */
RedisModuleString *RM_DictNext(RedisModuleCtx *ctx, RedisModuleDictIter *di, void **dataptr) {
size_t keylen;
void *key = RM_DictNextC(di,&keylen,dataptr);
if (key == NULL) return NULL;
return RM_CreateString(ctx,key,keylen);
}
/* Like RedisModule_DictNext() but after returning the currently selected
* element in the iterator, it selects the previous element (laxicographically
* smaller) instead of the next one. */
RedisModuleString *RM_DictPrev(RedisModuleCtx *ctx, RedisModuleDictIter *di, void **dataptr) {
size_t keylen;
void *key = RM_DictPrevC(di,&keylen,dataptr);
if (key == NULL) return NULL;
return RM_CreateString(ctx,key,keylen);
}
/* --------------------------------------------------------------------------
* Modules utility APIs