1b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence/*
2b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * Copyright 2011 Tresys Technology, LLC. All rights reserved.
3b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence *
4b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * Redistribution and use in source and binary forms, with or without
5b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * modification, are permitted provided that the following conditions are met:
6b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence *
7b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence *    1. Redistributions of source code must retain the above copyright notice,
8b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence *       this list of conditions and the following disclaimer.
9b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence *
10b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence *    2. Redistributions in binary form must reproduce the above copyright notice,
11b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence *       this list of conditions and the following disclaimer in the documentation
12b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence *       and/or other materials provided with the distribution.
13b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence *
14b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * THIS SOFTWARE IS PROVIDED BY TRESYS TECHNOLOGY, LLC ``AS IS'' AND ANY EXPRESS
15b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
16b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
17b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * EVENT SHALL TRESYS TECHNOLOGY, LLC OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
18b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
19b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
21b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
22b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence *
25b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * The views and conclusions contained in the software and documentation are those
26b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * of the authors and should not be interpreted as representing official policies,
27b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence * either expressed or implied, of Tresys Technology, LLC.
28b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence */
29b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence
30b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence#ifndef CIL_STACK_H_
31b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence#define CIL_STACK_H_
32b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence
33b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrencestruct cil_stack {
34b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence	struct cil_stack_item *stack;
35b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence	int size;
36b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence	int pos;
37b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence};
38b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence
39b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrencestruct cil_stack_item {
40b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence	enum cil_flavor flavor;
41b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence	void *data;
42b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence};
43b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence
44b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence#define cil_stack_for_each_starting_at(stack, start, pos, item) \
45b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence	for (pos = start, item = cil_stack_peek_at(stack, pos); item != NULL; pos++, item = cil_stack_peek_at(stack, pos))
46b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence
47b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence#define cil_stack_for_each(stack, pos, item) cil_stack_for_each_starting_at(stack, 0, pos, item)
48b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence
49b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence
50b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrencevoid cil_stack_init(struct cil_stack **stack);
51b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrencevoid cil_stack_destroy(struct cil_stack **stack);
52b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence
53b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrencevoid cil_stack_empty(struct cil_stack *stack);
54b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrenceint cil_stack_is_empty(struct cil_stack *stack);
55b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence
56b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrencevoid cil_stack_push(struct cil_stack *stack, enum cil_flavor flavor, void *data);
57b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrencestruct cil_stack_item *cil_stack_pop(struct cil_stack *stack);
58b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrencestruct cil_stack_item *cil_stack_peek(struct cil_stack *stack);
59b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrencestruct cil_stack_item *cil_stack_peek_at(struct cil_stack *stack, int pos);
60b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence
61b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence
62b19eafb97feb6389d78e1693f276fc5b10e25bdSteve Lawrence#endif
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