Delete src/modules/hellodict.c

src/modules/hellodict.c

@@ -1,125 +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 modules API.
- *
- * -----------------------------------------------------------------------------
- *
- * Copyright (c) 2018, Redis Ltd.
- * 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.
- */
-
-#include "../valkeymodule.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <string.h>
-
-static ValkeyModuleDict *Keyspace;
-
-/* HELLODICT.SET <key> <value>
- *
- * Set the specified key to the specified value. */
-int cmd_SET(ValkeyModuleCtx *ctx, ValkeyModuleString **argv, int argc) {
-    if (argc != 3) return ValkeyModule_WrongArity(ctx);
-    ValkeyModule_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. */
-    ValkeyModule_RetainString(NULL, argv[2]);
-    return ValkeyModule_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(ValkeyModuleCtx *ctx, ValkeyModuleString **argv, int argc) {
-    if (argc != 2) return ValkeyModule_WrongArity(ctx);
-    ValkeyModuleString *val = ValkeyModule_DictGet(Keyspace, argv[1], NULL);
-    if (val == NULL) {
-        return ValkeyModule_ReplyWithNull(ctx);
-    } else {
-        return ValkeyModule_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(ValkeyModuleCtx *ctx, ValkeyModuleString **argv, int argc) {
-    if (argc != 4) return ValkeyModule_WrongArity(ctx);
-
-    /* Parse the count argument. */
-    long long count;
-    if (ValkeyModule_StringToLongLong(argv[3], &count) != VALKEYMODULE_OK) {
-        return ValkeyModule_ReplyWithError(ctx, "ERR invalid count");
-    }
-
-    /* Seek the iterator. */
-    ValkeyModuleDictIter *iter = ValkeyModule_DictIteratorStart(Keyspace, ">=", argv[1]);
-
-    /* Reply with the matching items. */
-    char *key;
-    size_t keylen;
-    long long replylen = 0; /* Keep track of the emitted array len. */
-    ValkeyModule_ReplyWithArray(ctx, VALKEYMODULE_POSTPONED_LEN);
-    while ((key = ValkeyModule_DictNextC(iter, &keylen, NULL)) != NULL) {
-        if (replylen >= count) break;
-        if (ValkeyModule_DictCompare(iter, "<=", argv[2]) == VALKEYMODULE_ERR) break;
-        ValkeyModule_ReplyWithStringBuffer(ctx, key, keylen);
-        replylen++;
-    }
-    ValkeyModule_ReplySetArrayLength(ctx, replylen);
-
-    /* Cleanup. */
-    ValkeyModule_DictIteratorStop(iter);
-    return VALKEYMODULE_OK;
-}
-
-/* This function must be present on each module. It is used in order to
- * register the commands into the server. */
-int ValkeyModule_OnLoad(ValkeyModuleCtx *ctx, ValkeyModuleString **argv, int argc) {
-    VALKEYMODULE_NOT_USED(argv);
-    VALKEYMODULE_NOT_USED(argc);
-
-    if (ValkeyModule_Init(ctx, "hellodict", 1, VALKEYMODULE_APIVER_1) == VALKEYMODULE_ERR) return VALKEYMODULE_ERR;
-
-    if (ValkeyModule_CreateCommand(ctx, "hellodict.set", cmd_SET, "write deny-oom", 1, 1, 1) == VALKEYMODULE_ERR)
-        return VALKEYMODULE_ERR;
-
-    if (ValkeyModule_CreateCommand(ctx, "hellodict.get", cmd_GET, "readonly", 1, 1, 1) == VALKEYMODULE_ERR)
-        return VALKEYMODULE_ERR;
-
-    if (ValkeyModule_CreateCommand(ctx, "hellodict.keyrange", cmd_KEYRANGE, "readonly", 1, 1, 1) == VALKEYMODULE_ERR)
-        return VALKEYMODULE_ERR;
-
-    /* Create our global dictionary. Here we'll set our keys and values. */
-    Keyspace = ValkeyModule_CreateDict(NULL);
-
-    return VALKEYMODULE_OK;
-}