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126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/*****************************************************************************
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Copyright (c) 2006, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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/*******************************************************************//**
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@file include/ut0vec.h
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A vector of pointers to data items
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Created 4/6/2006 Osku Salerma
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************************************************************************/
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#ifndef IB_VECTOR_H
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#define IB_VECTOR_H
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#include "univ.i"
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#include "mem0mem.h"
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/** An automatically resizing vector data type. */
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typedef struct ib_vector_struct ib_vector_t;
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/* An automatically resizing vector datatype with the following properties:
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-Contains void* items.
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-The items are owned by the caller.
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-All memory allocation is done through a heap owned by the caller, who is
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responsible for freeing it when done with the vector.
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-When the vector is resized, the old memory area is left allocated since it
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uses the same heap as the new memory area, so this is best used for
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relatively small or short-lived uses.
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*/
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/****************************************************************//**
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Create a new vector with the given initial size.
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@return vector */
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UNIV_INTERN
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ib_vector_t*
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ib_vector_create(
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/*=============*/
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mem_heap_t* heap, /*!< in: heap */
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ulint size); /*!< in: initial size */
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/****************************************************************//**
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Push a new element to the vector, increasing its size if necessary. */
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UNIV_INTERN
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void
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ib_vector_push(
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/*===========*/
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ib_vector_t* vec, /*!< in: vector */
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void* elem); /*!< in: data element */
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/****************************************************************//**
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Get the number of elements in the vector.
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@return number of elements in vector */
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UNIV_INLINE
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ulint
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ib_vector_size(
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/*===========*/
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const ib_vector_t* vec); /*!< in: vector */
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/****************************************************************//**
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Test whether a vector is empty or not.
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@return TRUE if empty */
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UNIV_INLINE
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ibool
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ib_vector_is_empty(
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/*===============*/
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const ib_vector_t* vec); /*!< in: vector */
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/****************************************************************//**
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Get the n'th element.
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@return n'th element */
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UNIV_INLINE
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void*
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ib_vector_get(
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/*==========*/
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ib_vector_t* vec, /*!< in: vector */
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ulint n); /*!< in: element index to get */
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/****************************************************************//**
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Remove the last element from the vector. */
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UNIV_INLINE
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void*
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ib_vector_pop(
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/*==========*/
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ib_vector_t* vec); /*!< in: vector */
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/****************************************************************//**
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Free the underlying heap of the vector. Note that vec is invalid
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after this call. */
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UNIV_INLINE
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void
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ib_vector_free(
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/*===========*/
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ib_vector_t* vec); /*!< in,own: vector */
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/** An automatically resizing vector data type. */
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struct ib_vector_struct {
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mem_heap_t* heap; /*!< heap */
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void** data; /*!< data elements */
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ulint used; /*!< number of elements currently used */
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ulint total; /*!< number of elements allocated */
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};
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#ifndef UNIV_NONINL
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#include "ut0vec.ic"
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#endif
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#endif
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