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/*
* kmod - interface to kernel module operations
*
* Copyright (C) 2016 Intel Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "scratchbuf.h"
#include <errno.h>
#include <string.h>
void scratchbuf_init(struct scratchbuf *buf, char *stackbuf, size_t size)
{
buf->bytes = stackbuf;
buf->size = size;
buf->need_free = false;
}
int scratchbuf_alloc(struct scratchbuf *buf, size_t size)
{
char *tmp;
if (size <= buf->size)
return 0;
if (buf->need_free) {
tmp = realloc(buf->bytes, size);
if (tmp == NULL)
return -ENOMEM;
} else {
tmp = malloc(size);
if (tmp == NULL)
return -ENOMEM;
memcpy(tmp, buf->bytes, buf->size);
}
buf->size = size;
buf->bytes = tmp;
buf->need_free = true;
return 0;
}
void scratchbuf_release(struct scratchbuf *buf)
{
if (buf->need_free)
free(buf->bytes);
}
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