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