/usr/include/sphinxbase/heap.h is in libsphinxbase-dev 0.4.1-0ubuntu4.
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/* ====================================================================
* Copyright (c) 1999-2004 Carnegie Mellon University. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. 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.
*
* This work was supported in part by funding from the Defense Advanced
* Research Projects Agency and the National Science Foundation of the
* United States of America, and the CMU Sphinx Speech Consortium.
*
* THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
* ANY EXPRESSED 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 CARNEGIE MELLON UNIVERSITY
* NOR ITS EMPLOYEES 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.
*
* ====================================================================
*
*/
/*
* heap.h -- Generic heap structure for inserting in any and popping in sorted
* order.
*
* **********************************************
* CMU ARPA Speech Project
*
* Copyright (c) 1999 Carnegie Mellon University.
* ALL RIGHTS RESERVED.
* **********************************************
*
* HISTORY
* $Log: heap.h,v $
* Revision 1.7 2005/06/22 03:05:49 arthchan2003
* 1, Fixed doxygen documentation, 2, Add keyword.
*
* Revision 1.4 2005/06/15 04:21:46 archan
* 1, Fixed doxygen-documentation, 2, Add keyword such that changes will be logged into a file.
*
* Revision 1.3 2005/03/30 01:22:48 archan
* Fixed mistakes in last updates. Add
*
*
* 23-Dec-96 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University
* Started.
*/
#ifndef _LIBUTIL_HEAP_H_
#define _LIBUTIL_HEAP_H_
/* Win32/WinCE DLL gunk */
#include <sphinxbase_export.h>
#include <prim_type.h>
/** \file heap.h
* \brief Heap Implementation.
*
* General Comment: Sorted heap structure with three main operations:
*
* 1. Insert a data item (with two attributes: an application supplied pointer and an
* integer value; the heap is maintained in ascending order of the integer value).
* 2. Return the currently topmost item (i.e., item with smallest associated value).
* 3. Return the currently topmost item and pop it off the heap.
*/
#ifdef __cplusplus
extern "C" {
#endif
#if 0
/* Fool Emacs. */
}
#endif
typedef void *heap_t;
/**
* Allocate a new heap and return handle to it.
*/
SPHINXBASE_EXPORT
heap_t heap_new ( void );
/**
* Insert a new item into the given heap.
* Return value: 0 if successful, -1 otherwise.
*/
SPHINXBASE_EXPORT
int32 heap_insert (heap_t heap, /**< In: Heap into which item is to be inserted */
void *data, /**< In: Application-determined data pointer */
int32 val /**< In: According to item entered in sorted heap */
);
/**
* Return the topmost item in the heap.
* Return value: 1 if heap is not empty and the topmost value is returned;
* 0 if heap is empty; -1 if some error occurred.
*/
SPHINXBASE_EXPORT
int32 heap_top (heap_t heap, /**< In: Heap whose topmost item is to be returned */
void **data, /**< Out: Data pointer associated with the topmost item */
int32 *val /**< Out: Value associated with the topmost item */
);
/**
* Like heap_top but also pop the top item off the heap.
*/
SPHINXBASE_EXPORT
int32 heap_pop (heap_t heap, void **data, int32 *val);
/**
* Destroy the given heap; free the heap nodes. NOTE: Data pointers in the nodes are NOT freed.
* Return value: 0 if successful, -1 otherwise.
*/
SPHINXBASE_EXPORT
int32 heap_destroy (heap_t heap);
#ifdef __cplusplus
}
#endif
#endif
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