warzone2100/lib/betawidget/vector.c

140 lines
2.3 KiB
C

/*
This file is part of Warzone 2100.
Copyright (C) 2008 Freddie Witherden
Copyright (C) 2008 Warzone Resurrection Project
Warzone 2100 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Warzone 2100 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
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <string.h>
#include "vector.h"
struct _vector
{
void **mem;
int size;
int head;
};
static const int defaultSize = 4;
vector *vectorCreate()
{
vector *v = malloc(sizeof(vector));
if (v == NULL)
{
return NULL;
}
v->mem = calloc(defaultSize, sizeof(void *));
if (v->mem == NULL)
{
free(v);
return NULL;
}
v->size = defaultSize;
v->head = 0;
return v;
}
void vectorDestroy(vector *v)
{
free(v->mem);
free(v);
}
void *vectorAdd(vector *v, void *object)
{
if (v->head + 1 > v->size)
{
void **newMem = realloc(v->mem, 2 * v->size * sizeof(void *));
if (newMem == NULL)
{
return NULL;
}
v->mem = newMem;
v->size *= 2;
}
v->mem[v->head++] = object;
return object;
}
void *vectorAt(vector *v, int index)
{
return (index < v->head && index >= 0) ? v->mem[index] : NULL;
}
void *vectorHead(vector *v)
{
return vectorAt(v, v->head - 1);
}
void *vectorSetAt(vector *v, int index, void *object)
{
if (index >= v->head)
{
return NULL;
}
// Replace the item
v->mem[index] = object;
return object;
}
void vectorRemoveAt(vector *v, int index)
{
if (index >= v->head)
{
return;
}
memmove(&v->mem[index], &v->mem[index + 1],
(v->head - index) * sizeof(void *));
v->head--;
}
void vectorMap(vector *v, mapCallback cb)
{
int i;
for (i = 0; i < v->head; i++)
{
cb(v->mem[i]);
}
}
void vectorMapAndDestroy(vector *v, mapCallback cb)
{
vectorMap(v, cb);
vectorDestroy(v);
}
int vectorSize(vector *v)
{
return v->head;
}