Checking a Key (C/C++)
Check whether a key exists.
How to Develop
-
Construct the parameters.
- Set the key alias (keyAlias), which cannot exceed 64 bytes.
- Set TAG of the key. By default, leave this parameter empty.
-
Use OH_Huks_IsKeyItemExist to check whether the key exists.
#include "huks/native_huks_api.h"
#include "huks/native_huks_param.h"
#include <string.h>
static napi_value IsKeyExist(napi_env env, napi_callback_info info)
{
/* 1. Obtain the key alias. */
struct OH_Huks_Blob keyAlias = {
(uint32_t)strlen("test_key"),
(uint8_t *)"test_key"
};
/* 2. Call OH_Huks_IsKeyItemExist to check whether the key exists. */
struct OH_Huks_Result ohResult = OH_Huks_IsKeyItemExist(&keyAlias, nullptr);
// OH_HUKS_SUCCESS means the key exists, and OH_HUKS_ERR_CODE_ITEM_NOT_EXIST means the opposite.
napi_value ret;
napi_create_int32(env, ohResult.errorCode, &ret);
return ret;
}