Delete src/modules/hellodict.c

src/modules/hellodict.c

@@ -1,132 +0,0 @@
-/* Hellodict -- An example of modules dictionary API
- *
- * This module implements a volatile key-value store on top of the
- * dictionary exported by the Redis modules API.
- *
- * -----------------------------------------------------------------------------
- *
- * Copyright (c) 2018, Salvatore Sanfilippo <antirez at gmail dot com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *   * Redistributions of source code must retain the above copyright notice,
- *     this list of conditions and the following disclaimer.
- *   * Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution.
- *   * Neither the name of Redis nor the names of its contributors may be used
- *     to endorse or promote products derived from this software without
- *     specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#define REDISMODULE_EXPERIMENTAL_API
-#include "../redismodule.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <string.h>
-
-static RedisModuleDict *Keyspace;
-
-/* HELLODICT.SET <key> <value>
- *
- * Set the specified key to the specified value. */
-int cmd_SET(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
-    if (argc != 3) return RedisModule_WrongArity(ctx);
-    RedisModule_DictSet(Keyspace,argv[1],argv[2]);
-    /* We need to keep a reference to the value stored at the key, otherwise
-     * it would be freed when this callback returns. */
-    RedisModule_RetainString(NULL,argv[2]);
-    return RedisModule_ReplyWithSimpleString(ctx, "OK");
-}
-
-/* HELLODICT.GET <key>
- *
- * Return the value of the specified key, or a null reply if the key
- * is not defined. */
-int cmd_GET(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
-    if (argc != 2) return RedisModule_WrongArity(ctx);
-    RedisModuleString *val = RedisModule_DictGet(Keyspace,argv[1],NULL);
-    if (val == NULL) {
-        return RedisModule_ReplyWithNull(ctx);
-    } else {
-        return RedisModule_ReplyWithString(ctx, val);
-    }
-}
-
-/* HELLODICT.KEYRANGE <startkey> <endkey> <count>
- *
- * Return a list of matching keys, lexicographically between startkey
- * and endkey. No more than 'count' items are emitted. */
-int cmd_KEYRANGE(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
-    if (argc != 4) return RedisModule_WrongArity(ctx);
-
-    /* Parse the count argument. */
-    long long count;
-    if (RedisModule_StringToLongLong(argv[3],&count) != REDISMODULE_OK) {
-        return RedisModule_ReplyWithError(ctx,"ERR invalid count");
-    }
-
-    /* Seek the iterator. */
-    RedisModuleDictIter *iter = RedisModule_DictIteratorStart(
-        Keyspace, ">=", argv[1]);
-
-    /* Reply with the matching items. */
-    char *key;
-    size_t keylen;
-    long long replylen = 0; /* Keep track of the amitted array len. */
-    RedisModule_ReplyWithArray(ctx,REDISMODULE_POSTPONED_ARRAY_LEN);
-    while((key = RedisModule_DictNextC(iter,&keylen,NULL)) != NULL) {
-        if (replylen >= count) break;
-        if (RedisModule_DictCompare(iter,"<=",argv[2]) == REDISMODULE_ERR)
-            break;
-        RedisModule_ReplyWithStringBuffer(ctx,key,keylen);
-        replylen++;
-    }
-    RedisModule_ReplySetArrayLength(ctx,replylen);
-
-    /* Cleanup. */
-    RedisModule_DictIteratorStop(iter);
-    return REDISMODULE_OK;
-}
-
-/* This function must be present on each Redis module. It is used in order to
- * register the commands into the Redis server. */
-int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
-    REDISMODULE_NOT_USED(argv);
-    REDISMODULE_NOT_USED(argc);
-
-    if (RedisModule_Init(ctx,"hellodict",1,REDISMODULE_APIVER_1)
-        == REDISMODULE_ERR) return REDISMODULE_ERR;
-
-    if (RedisModule_CreateCommand(ctx,"hellodict.set",
-        cmd_SET,"write deny-oom",1,1,0) == REDISMODULE_ERR)
-        return REDISMODULE_ERR;
-
-    if (RedisModule_CreateCommand(ctx,"hellodict.get",
-        cmd_GET,"readonly",1,1,0) == REDISMODULE_ERR)
-        return REDISMODULE_ERR;
-
-    if (RedisModule_CreateCommand(ctx,"hellodict.keyrange",
-        cmd_KEYRANGE,"readonly",1,1,0) == REDISMODULE_ERR)
-        return REDISMODULE_ERR;
-
-    /* Create our global dictionary. Here we'll set our keys and values. */
-    Keyspace = RedisModule_CreateDict(NULL);
-
-    return REDISMODULE_OK;
-}