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/*
* Copyright (c) 1999-2002, Darren Hiebert
*
* This source code is released for free distribution under the terms of the
* GNU General Public License version 2 or (at your option) any later version.
*
* This module contains functions managing resizable pointer arrays.
*/
/*
* INCLUDE FILES
*/
#include "general.h" /* must always come first */
#include <string.h>
#include <stdlib.h>
#include "debug.h"
#include "ptrarray.h"
#include "routines.h"
/*
* DATA DECLARATIONS
*/
struct sPtrArray {
unsigned int max;
unsigned int count;
void **array;
ptrArrayDeleteFunc deleteFunc;
};
/*
* FUNCTION DEFINITIONS
*/
extern ptrArray *ptrArrayNew (ptrArrayDeleteFunc deleteFunc)
{
ptrArray* const result = xMalloc (1, ptrArray);
result->max = 8;
result->count = 0;
result->array = xMalloc (result->max, void*);
result->deleteFunc = deleteFunc;
return result;
}
extern void ptrArrayAdd (ptrArray *const current, void *ptr)
{
Assert (current != NULL);
if (current->count == current->max)
{
current->max *= 2;
current->array = xRealloc (current->array, current->max, void*);
}
current->array [current->count++] = ptr;
}
extern void ptrArrayRemoveLast (ptrArray *const current)
{
Assert (current != NULL);
Assert (current->count > 0);
--current->count;
}
/* Combine array `from' into `current', deleting `from' */
extern void ptrArrayCombine (ptrArray *const current, ptrArray *const from)
{
unsigned int i;
Assert (current != NULL);
Assert (from != NULL);
for (i = 0 ; i < from->count ; ++i)
ptrArrayAdd (current, from->array [i]);
from->count = 0;
ptrArrayDelete (from);
}
extern unsigned int ptrArrayCount (const ptrArray *const current)
{
Assert (current != NULL);
return current->count;
}
extern void* ptrArrayItem (const ptrArray *const current, const unsigned int indx)
{
Assert (current != NULL);
return current->array [indx];
}
extern void* ptrArrayLast (const ptrArray *const current)
{
Assert (current != NULL);
Assert (current->count > 0);
return current->array [current->count - 1];
}
extern void ptrArrayClear (ptrArray *const current)
{
Assert (current != NULL);
if (current->deleteFunc)
{
unsigned int i;
for (i = 0 ; i < current->count ; ++i)
current->deleteFunc (current->array [i]);
}
current->count = 0;
}
extern void ptrArrayDelete (ptrArray *const current)
{
if (current != NULL)
{
ptrArrayClear (current);
eFree (current->array);
eFree (current);
}
}
extern bool ptrArrayHasTest (const ptrArray *const current,
bool (*test)(const void *ptr, void *userData),
void *userData)
{
bool result = false;
unsigned int i;
Assert (current != NULL);
for (i = 0 ; ! result && i < current->count ; ++i)
result = (*test)(current->array [i], userData);
return result;
}
static bool ptrEq (const void *ptr, void *userData)
{
return (ptr == userData);
}
extern bool ptrArrayHas (const ptrArray *const current, void *ptr)
{
return ptrArrayHasTest (current, ptrEq, ptr);
}
extern void ptrArrayReverse (const ptrArray *const current)
{
unsigned int i, j;
void *tmp;
Assert (current != NULL);
for (i = 0, j = current->count - 1 ; i < (current->count / 2); ++i, --j)
{
tmp = current->array[i];
current->array[i] = current->array[j];
current->array[j] = tmp;
}
}
extern void ptrArrayDeleteItem (ptrArray* const current, unsigned int indx)
{
void *ptr = current->array[indx];
if (current->deleteFunc)
current->deleteFunc (ptr);
memmove (current->array + indx, current->array + indx + 1,
(current->count - indx) * sizeof (*current->array));
--current->count;
}
static int (*ptrArraySortCompareVar)(const void *, const void *);
static int ptrArraySortCompare(const void *a0, const void *b0)
{
void *const *a = (void *const *)a0;
void *const *b = (void *const *)b0;
return ptrArraySortCompareVar (*a, *b);
}
extern void ptrArraySort (ptrArray *const current, int (*compare)(const void *, const void *))
{
ptrArraySortCompareVar = compare;
qsort (current->array, current->count, sizeof (void *), ptrArraySortCompare);
}
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