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/*
* (C) 2006-2008 by Pablo Neira Ayuso <pablo@netfilter.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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "buffer.h"
struct buffer *buffer_create(unsigned int size)
{
struct buffer *b;
b = malloc(sizeof(struct buffer));
if (b == NULL)
return NULL;
memset(b, 0, sizeof(struct buffer));
b->size = size;
b->data = malloc(size);
if (b->data == NULL) {
free(b);
return NULL;
}
memset(b->data, 0, size);
return b;
}
int buffer_add(struct buffer *b, void *data, unsigned int size)
{
if (b->size - b->cur_size < size) {
errno = ENOSPC;
return -1;
}
memcpy(b->data + b->cur_size, data, size);
b->cur_size += size;
}
void buffer_flush(struct buffer *b,
void (*cb)(void *buffer_data, void *data),
void *data)
{
cb(b->data, data);
b->cur_size = 0;
memset(b->data, 0, b->size);
}
unsigned int buffer_size(const struct buffer *b)
{
return b->size;
}
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