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/*********************************************************
* Copyright (C) 2004 VMware, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation version 2.1 and no later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the Lesser GNU General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
*********************************************************/
/*
* dynarray.c --
*
* Dynamic array of objects -- tonyc
*/
#include <stdlib.h>
#include "vmware.h"
#include "dynarray.h"
/*
*-----------------------------------------------------------------------------
*
* DynArray_Init --
*
* Initialize the dynamic array
*
* Results:
* TRUE on success. FALSE on failure.
*
* Side effects:
* See above
*
*-----------------------------------------------------------------------------
*/
Bool
DynArray_Init(DynArray *a, // IN/OUT
unsigned int count, // IN
size_t width) // IN
{
ASSERT(a);
DynBuf_Init(&a->buf);
a->width = width;
return DynArray_SetCount(a, count);
}
/*
*-----------------------------------------------------------------------------
*
* DynArray_Destroy --
*
* Destroy the array
*
* Results:
* None
*
* Side effects:
* See above
*
*-----------------------------------------------------------------------------
*/
void
DynArray_Destroy(DynArray *a) // IN/OUT
{
ASSERT(a);
DynBuf_Destroy(&a->buf);
}
/*
*-----------------------------------------------------------------------------
*
* DynArray_SetCount --
*
* Sets the number of elements in the array. This may enlarge
* the size of the array.
*
* Results:
* TRUE on success
* FALSE on failure (not enough memory)
*
* Side effects:
* May resize the array
*
*-----------------------------------------------------------------------------
*/
Bool
DynArray_SetCount(DynArray *a, // IN/OUT
unsigned int c) // IN
{
size_t needed, allocated;
ASSERT(a);
needed = c * a->width;
allocated = DynBuf_GetAllocatedSize(&a->buf);
if (allocated < needed) {
if (!DynBuf_Enlarge(&a->buf, needed)) {
return FALSE;
}
}
DynBuf_SetSize(&a->buf, needed);
return TRUE;
}
/*
*-----------------------------------------------------------------------------
*
* DynArray_AllocCount --
*
* Returns the actual size of the array. If you want the effective
* size, use DynArray_Count. Technically, you don't need this API
* unless you're doing trimming (i.e. Don't bother trimming if
* DynArray_AllocCount is within some threshold of DynArray_Count.
* It won't buy you much).
*
* XXX: This is relatively slow, since we do an integer division.
* Avoid calling this in inner loops.
*
* Results:
* See above.
*
* Side effects:
* None.
*
*-----------------------------------------------------------------------------
*/
unsigned int
DynArray_AllocCount(const DynArray *a) // IN
{
ASSERT(a);
return (unsigned int) (DynBuf_GetAllocatedSize(&a->buf) / a->width);
}
/*
*-----------------------------------------------------------------------------
*
* DynArray_QSort --
*
* A wrapper for the quicksort function. Sorts the DynArray
* according to the provided comparison function.
*
* Results:
* None.
*
* Side effects:
* None.
*
*-----------------------------------------------------------------------------
*/
void
DynArray_QSort(DynArray *a, // IN/OUT
DynArrayCmp compare) // IN
{
uint8 *arrayBuf;
ASSERT(a);
ASSERT(compare);
arrayBuf = DynBuf_Get(&a->buf);
qsort(arrayBuf, DynArray_Count(a), a->width, compare);
}
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