62 lines
1.7 KiB
C
Executable File
62 lines
1.7 KiB
C
Executable File
/*
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* ptrarray.c
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* simple pointer array implementation
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*
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* Copyright (c) 2011 Nikias Bassen, All Rights Reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "ptrarray.h"
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ptrarray_t *ptr_array_new(int capacity)
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{
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ptrarray_t *pa = (ptrarray_t*)malloc(sizeof(ptrarray_t));
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pa->pdata = (void**)malloc(sizeof(void*) * capacity);
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pa->capacity = capacity;
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pa->capacity_step = (capacity > 4096) ? 4096 : capacity;
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pa->len = 0;
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return pa;
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}
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void ptr_array_free(ptrarray_t *pa)
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{
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if (!pa) return;
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if (pa->pdata) {
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free(pa->pdata);
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}
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free(pa);
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}
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void ptr_array_add(ptrarray_t *pa, void *data)
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{
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if (!pa || !pa->pdata || !data) return;
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size_t remaining = pa->capacity-pa->len;
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if (remaining == 0) {
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pa->pdata = realloc(pa->pdata, sizeof(void*) * (pa->capacity + pa->capacity_step));
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pa->capacity += pa->capacity_step;
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}
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pa->pdata[pa->len] = data;
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pa->len++;
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}
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void* ptr_array_index(ptrarray_t *pa, size_t array_index)
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{
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if (!pa) return NULL;
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if (array_index >= pa->len) {
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return NULL;
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}
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return pa->pdata[array_index];
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}
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