mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-11 09:50:12 +00:00
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/*-
|
|
* 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);
|
|
}
|