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lib: adding vector module

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Henrik Hautakoski 2018-12-09 18:31:35 +01:00
parent adbe0006f5
commit a305c34b39
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2 changed files with 95 additions and 0 deletions
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41
lib/include/vector.h Normal file
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/* vector.h
*
* Copyright (C) 2018 Henrik Hautakoski <henrik@fiktivkod.org>
*
* This program 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.
*
* 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
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#ifndef VECTOR_H
#define VECTOR_H
#include <stddef.h>
#include <stdint.h>
struct vector {
size_t blk_sz;
size_t alloc;
size_t size;
void *base;
};
#define VECTOR_INIT(block_size) { block_size, 0, 0, NULL }
void vector_init(struct vector* v, size_t block_size);
void vector_destory(struct vector* v);
void vector_append(struct vector* v, const void *ptr, size_t n);
#endif /* VECTOR_H */

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lib/src/vector.c Normal file
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/* vector.c
*
* Copyright (C) 2018 Henrik Hautakoski <henrik@fiktivkod.org>
*
* This program 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.
*
* 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
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include <string.h>
#include <stdlib.h>
#include <vector.h>
static void ensure_size(struct vector* v, size_t n) {
size_t old_alloc = v->alloc;
while(v->alloc < v->size + n)
v->alloc += v->blk_sz;
if (old_alloc != v->alloc)
v->base = realloc(v->base, v->alloc);
}
void vector_init(struct vector* v, size_t block_size) {
v->blk_sz = block_size > 0 ? block_size : 64;
v->alloc = 0;
v->size = 0;
v->base = NULL;
}
void vector_destory(struct vector *v) {
if (v->base)
free(v->base);
}
void vector_append(struct vector *v, const void *ptr, size_t n) {
ensure_size(v, n);
memcpy(v->base + v->size, ptr, n);
v->size += n;
}