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Modules: Modules: dictionary API WIP #11: DictCompareC API.

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antirez 2018-09-27 11:39:58 +02:00
parent 20f047965c
commit 7af83a0c11
1 changed files with 18 additions and 0 deletions
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18
src/module.c
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@ -4568,6 +4568,24 @@ RedisModuleString *RM_DictPrev(RedisModuleCtx *ctx, RedisModuleDictIter *di, voi
return RM_CreateString(ctx,key,keylen);
}
/* Compare the element currently pointed by the iterator to the specified
* element given by key/keylen, according to the operator 'op' (the set of
* valid operators are the same valid for RedisModule_DictIteratorStart).
* If the comparision is successful the command returns REDISMODULE_OK
* otherwise REDISMODULE_ERR is returned.
*
* This is useful when we want to just emit a lexicographical range, so
* in the loop, as we iterate elements, we can also check if we are still
* on range.
*
* The function returne REDISMODULE_ERR if the iterator reached the
* end of elements condition as well. */
int RM_DictCompareC(RedisModuleDictIter *di, const char *op, void *key, size_t keylen) {
if (raxEOF(&di->ri)) return REDISMODULE_ERR;
int res = raxCompare(&di->ri,op,key,keylen);
return res ? REDISMODULE_OK : REDISMODULE_ERR;
}
/* --------------------------------------------------------------------------
* Modules utility APIs
* -------------------------------------------------------------------------- */