1/*****************************************************************************/
2/* */
3/* istack.h */
4/* */
5/* Input stack for the scanner */
6/* */
7/* */
8/* */
9/* (C) 2000 Ullrich von Bassewitz */
10/* Wacholderweg 14 */
11/* D-70597 Stuttgart */
12/* EMail: uz@musoftware.de */
13/* */
14/* */
15/* This software is provided 'as-is', without any expressed or implied */
16/* warranty. In no event will the authors be held liable for any damages */
17/* arising from the use of this software. */
18/* */
19/* Permission is granted to anyone to use this software for any purpose, */
20/* including commercial applications, and to alter it and redistribute it */
21/* freely, subject to the following restrictions: */
22/* */
23/* 1. The origin of this software must not be misrepresented; you must not */
24/* claim that you wrote the original software. If you use this software */
25/* in a product, an acknowledgment in the product documentation would be */
26/* appreciated but is not required. */
27/* 2. Altered source versions must be plainly marked as such, and must not */
28/* be misrepresented as being the original software. */
29/* 3. This notice may not be removed or altered from any source */
30/* distribution. */
31/* */
32/*****************************************************************************/
33
34
35
36#ifndef ISTACK_H
37#define ISTACK_H
38
39
40
41/*****************************************************************************/
42/* Code */
43/*****************************************************************************/
44
45
46
47void PushInput (int (*Func) (void*), void* Data, const char* Desc);
48/* Push an input function onto the input stack */
49
50void PopInput (void);
51/* Pop the current input function from the input stack */
52
53int InputFromStack (void);
54/* Try to get input from the input stack. Return true if we had such input,
55** return false otherwise.
56*/
57
58int HavePushedInput (void);
59/* Return true if we have stacked input available, return false if not */
60
61void CheckInputStack (void);
62/* Called from the scanner before closing an input file. Will check for any
63** stuff on the input stack.
64*/
65
66
67
68/* End of istack.h */
69
70#endif
71