1 /* 2 * Copyright 2011 Tresys Technology, LLC. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * 1. Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY TRESYS TECHNOLOGY, LLC ``AS IS'' AND ANY EXPRESS 15 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 16 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 17 * EVENT SHALL TRESYS TECHNOLOGY, LLC OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 18 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 21 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 22 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * The views and conclusions contained in the software and documentation are those 26 * of the authors and should not be interpreted as representing official policies, 27 * either expressed or implied, of Tresys Technology, LLC. 28 */ 29 30 #ifndef CIL_STACK_H_ 31 #define CIL_STACK_H_ 32 33 struct cil_stack { 34 struct cil_stack_item *stack; 35 int size; 36 int pos; 37 }; 38 39 struct cil_stack_item { 40 enum cil_flavor flavor; 41 void *data; 42 }; 43 44 #define cil_stack_for_each_starting_at(stack, start, pos, item) \ 45 for (pos = start, item = cil_stack_peek_at(stack, pos); item != NULL; pos++, item = cil_stack_peek_at(stack, pos)) 46 47 #define cil_stack_for_each(stack, pos, item) cil_stack_for_each_starting_at(stack, 0, pos, item) 48 49 50 void cil_stack_init(struct cil_stack **stack); 51 void cil_stack_destroy(struct cil_stack **stack); 52 53 void cil_stack_empty(struct cil_stack *stack); 54 int cil_stack_is_empty(struct cil_stack *stack); 55 56 void cil_stack_push(struct cil_stack *stack, enum cil_flavor flavor, void *data); 57 struct cil_stack_item *cil_stack_pop(struct cil_stack *stack); 58 struct cil_stack_item *cil_stack_peek(struct cil_stack *stack); 59 struct cil_stack_item *cil_stack_peek_at(struct cil_stack *stack, int pos); 60 61 62 #endif 63
