62 lines
1.8 KiB
C
Executable File
62 lines
1.8 KiB
C
Executable File
/*
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* bytearray.c
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* simple byte 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 <string.h>
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#include "bytearray.h"
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#define PAGE_SIZE 4096
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bytearray_t *byte_array_new(size_t initial)
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{
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bytearray_t *a = (bytearray_t*)malloc(sizeof(bytearray_t));
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a->capacity = (initial > PAGE_SIZE) ? (initial+(PAGE_SIZE-1)) & (~(PAGE_SIZE-1)) : PAGE_SIZE;
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a->data = malloc(a->capacity);
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a->len = 0;
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return a;
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}
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void byte_array_free(bytearray_t *ba)
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{
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if (!ba) return;
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if (ba->data) {
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free(ba->data);
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}
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free(ba);
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}
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void byte_array_grow(bytearray_t *ba, size_t amount)
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{
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size_t increase = (amount > PAGE_SIZE) ? (amount+(PAGE_SIZE-1)) & (~(PAGE_SIZE-1)) : PAGE_SIZE;
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ba->data = realloc(ba->data, ba->capacity + increase);
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ba->capacity += increase;
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}
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void byte_array_append(bytearray_t *ba, void *buf, size_t len)
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{
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if (!ba || !ba->data || (len <= 0)) return;
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size_t remaining = ba->capacity-ba->len;
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if (len > remaining) {
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size_t needed = len - remaining;
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byte_array_grow(ba, needed);
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}
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memcpy(((char*)ba->data) + ba->len, buf, len);
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ba->len += len;
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}
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