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comparison lwlib/lw_stack.h @ 329:c15cca3ae6a2

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Created first pass of input layer
author lost
date Sun, 28 Feb 2010 05:01:31 +0000
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328:591d01b343b9 329:c15cca3ae6a2
1 /*
2 lw_stack.h
3
4 Copyright © 2010 William Astle
5
6 This file is part of LWTOOLS.
7
8 LWTOOLS is free software: you can redistribute it and/or modify it under the
9 terms of the GNU General Public License as published by the Free Software
10 Foundation, either version 3 of the License, or (at your option) any later
11 version.
12
13 This program is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 more details.
17
18 You should have received a copy of the GNU General Public License along with
19 this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #ifndef ___lw_stack_h_seen___
23 #define ___lw_stack_h_seen___
24
25
26 #ifdef ___lw_stack_c_seen___
27
28 struct lw_stack_node_priv
29 {
30 void *data;
31 struct lw_stack_node_priv *next;
32 };
33
34 struct lw_stack_priv
35 {
36 struct lw_stack_node_priv *head;
37 void (*freefn)(void *d);
38 };
39
40 typedef struct lw_stack_priv * lw_stack_t;
41
42 #else /* def ___lw_stack_c_seen___ */
43
44 typedef void * lw_stack_t;
45 extern lw_stack_t lw_stack_create(void (*freefn)(void *d));
46 extern void lw_stack_destroy(lw_stack_t S);
47 extern void *lw_stack_top(lw_stack_t S);
48 extern void *lw_stack_pop(lw_stack_t S);
49 extern void lw_stack_push(lw_stack_t S, void *item);
50
51 #endif /* def ___lw_stack_c_seen___ */
52
53 #endif /* ___lw_stack_h_seen___ */