Function hash_set

app/redis-6.2.6/tests/modules/hash.c:21–77

HASH.SET key flags field1 value1 [field2 value2 ..] * * Sets 1-4 fields. Returns the same as RedisModule_HashSet(). * Flags is a string of "nxa" where n = NX, x = XX, a = COUNT_ALL. * To delete a field, use the value ":delete:". */

 * To delete a field, use the value ":delete:".
 */
int hash_set(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
    if (argc < 5 || argc % 2 == 0 || argc > 11)
        return RedisModule_WrongArity(ctx);

    RedisModule_AutoMemory(ctx);
    RedisModuleKey *key = RedisModule_OpenKey(ctx, argv[1], REDISMODULE_WRITE);

    size_t flags_len;
    const char *flags_str = RedisModule_StringPtrLen(argv[2], &flags_len);
    int flags = REDISMODULE_HASH_NONE;
    for (size_t i = 0; i < flags_len; i++) {
        switch (flags_str[i]) {
        case 'n': flags |= REDISMODULE_HASH_NX; break;
        case 'x': flags |= REDISMODULE_HASH_XX; break;
        case 'a': flags |= REDISMODULE_HASH_COUNT_ALL; break;
        }
    }

    /* Test some varargs. (In real-world, use a loop and set one at a time.) */
    int result;
    errno = 0;
    if (argc == 5) {
        result = RedisModule_HashSet(key, flags,
                                     argv[3], value_or_delete(argv[4]),
                                     NULL);
    } else if (argc == 7) {
        result = RedisModule_HashSet(key, flags,
                                     argv[3], value_or_delete(argv[4]),
                                     argv[5], value_or_delete(argv[6]),
                                     NULL);
    } else if (argc == 9) {
        result = RedisModule_HashSet(key, flags,
                                     argv[3], value_or_delete(argv[4]),
                                     argv[5], value_or_delete(argv[6]),
                                     argv[7], value_or_delete(argv[8]),
                                     NULL);
    } else if (argc == 11) {
        result = RedisModule_HashSet(key, flags,
                                     argv[3], value_or_delete(argv[4]),
                                     argv[5], value_or_delete(argv[6]),
                                     argv[7], value_or_delete(argv[8]),
                                     argv[9], value_or_delete(argv[10]),
                                     NULL);
    } else {
        return RedisModule_ReplyWithError(ctx, "ERR too many fields");
    }

    /* Check errno */
    if (result == 0) {
        if (errno == ENOTSUP)
            return RedisModule_ReplyWithError(ctx, REDISMODULE_ERRORMSG_WRONGTYPE);
        else
            RedisModule_Assert(errno == ENOENT);
    }

    return RedisModule_ReplyWithLongLong(ctx, result);
}