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https://github.com/pnx/m16vm
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54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/* vector.c
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*
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* Copyright (C) 2018 Henrik Hautakoski <henrik@fiktivkod.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "vector.h"
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static void ensure_size(struct vector* v, size_t n) {
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size_t old_alloc = v->alloc;
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while(v->alloc < v->size + n)
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v->alloc += v->blk_sz;
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if (old_alloc != v->alloc)
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v->base = realloc(v->base, v->alloc);
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}
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void vector_init(struct vector* v, size_t block_size) {
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v->blk_sz = block_size > 0 ? block_size : VECTOR_BLOCK_SIZE;
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v->alloc = 0;
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v->size = 0;
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v->base = NULL;
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}
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void vector_destory(struct vector *v) {
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if (v->base)
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free(v->base);
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}
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void vector_append(struct vector *v, const void *ptr, size_t n) {
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ensure_size(v, n);
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memcpy(v->base + v->size, ptr, n);
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v->size += n;
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}
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