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/*
* Copyright (c) 2004, Stefan Walter
* 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.
* * The names of contributors to this software may not 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.
*/
/*
* Originally from apache 2.0
* Modifications for general use by <stef@memberwebs.com>
*/
/* Copyright 2000-2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __HSH_H__
#define __HSH_H__
#include <sys/types.h>
/*
* OPTIONAL FEATURES
*
* Features to define. You need to build both this file and
* the corresponding hash.c file with whatever options you set here.
* These affect the method signatures, so see the sections below
* for the actual options
*/
/*
* ARGUMENT DOCUMENTATION
*
* ht: The hashtable
* key: Pointer to the key value
* klen: The length of the key
* val: Pointer to the value
* hi: A hashtable iterator
* stamp: A unix timestamp
*/
/* ----------------------------------------------------------------------------------
* TYPES
*/
/* Abstract type for hash tables. */
typedef struct hsh_t hsh_t;
/* Abstract type for scanning hash tables. */
typedef struct hsh_index_t hsh_index_t;
/* -----------------------------------------------------------------------------
* MAIN
*/
/*
* hsh_create : Create a hash table
* - returns an allocated hashtable
*/
hsh_t* hsh_create(void);
/*
* hsh_free : Free a hash table
*/
void hsh_free(hsh_t* ht);
/*
* hsh_count: Number of values in hash table
* - returns the number of entries in hash table
*/
unsigned int hsh_count(hsh_t* ht);
/*
* hsh_get: Retrieves a value from the hash table
* - returns the value of the entry
*/
void* hsh_get(hsh_t* ht, const void* key, size_t klen);
/*
* hsh_set: Set a value in the hash table
* - returns 1 if the entry was added properly
*/
int hsh_set(hsh_t* ht, const void* key, size_t klen, void* val);
/*
* hsh_rem: Remove a value from the hash table
* - returns the value of the removed entry
*/
void* hsh_rem(hsh_t* ht, const void* key, size_t klen);
/*
* hsh_first: Start enumerating through the hash table
* - returns a hash iterator
*/
hsh_index_t* hsh_first(hsh_t* ht);
/*
* hsh_next: Enumerate through hash table
* - returns the hash iterator or null when no more entries
*/
hsh_index_t* hsh_next(hsh_index_t* hi);
/*
* hsh_this: While enumerating get current value
* - returns the value that the iterator currently points to
*/
void* hsh_this(hsh_index_t* hi, const void** key, size_t* klen);
/*
* hsh_clear: Clear all values from has htable.
*/
void hsh_clear(hsh_t* ht);
/*
* This can be passed as 'klen' in any of the above functions to indicate
* a string-valued key, and have hash compute the length automatically.
*/
#define HSH_KEY_STRING (-1)
#endif /* __HSH_H__ */
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