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/*-
* Copyright (c) 2006, Maxime Henrion <mux@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
*/
#include <assert.h>
#include <stdlib.h>
#include "attrstack.h"
#include "fattr.h"
#include "misc.h"
#define ATTRSTACK_DEFSIZE 16 /* Initial size of the stack. */
struct attrstack {
struct fattr **stack;
size_t cur;
size_t size;
};
struct attrstack *
attrstack_new(void)
{
struct attrstack *as;
as = xmalloc(sizeof(struct attrstack));
as->stack = xmalloc(sizeof(struct fattr *) * ATTRSTACK_DEFSIZE);
as->size = ATTRSTACK_DEFSIZE;
as->cur = 0;
return (as);
}
struct fattr *
attrstack_pop(struct attrstack *as)
{
assert(as->cur > 0);
return (as->stack[--as->cur]);
}
void
attrstack_push(struct attrstack *as, struct fattr *fa)
{
if (as->cur >= as->size) {
as->size *= 2;
as->stack = xrealloc(as->stack,
sizeof(struct fattr *) * as->size);
}
as->stack[as->cur++] = fa;
}
size_t
attrstack_size(struct attrstack *as)
{
return (as->cur);
}
void
attrstack_free(struct attrstack *as)
{
assert(as->cur == 0);
free(as->stack);
free(as);
}
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