1/*****************************************************************************/
2/* */
3/* ulabel.h */
4/* */
5/* Unnamed labels for the ca65 macroassembler */
6/* */
7/* */
8/* */
9/* (C) 2000-2011, Ullrich von Bassewitz */
10/* Roemerstrasse 52 */
11/* D-70794 Filderstadt */
12/* EMail: uz@cc65.org */
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 ULABEL_H
37#define ULABEL_H
38
39
40
41/*****************************************************************************/
42/* Code */
43/*****************************************************************************/
44
45
46
47ExprNode* ULabRef (int Which);
48/* Get an unnamed label. If Which is negative, it is a backreference (a
49** reference to an already defined label), and the function will return a
50** segment relative expression. If Which is positive, it is a forward ref,
51** and the function will return a expression node for an unnamed label that
52** must be resolved later.
53*/
54
55void ULabDef (void);
56/* Define an unnamed label at the current PC */
57
58int ULabCanResolve (void);
59/* Return true if we can resolve arbitrary ULabels. */
60
61ExprNode* ULabResolve (unsigned Index);
62/* Return a valid expression for the unnamed label with the given index. This
63** is used to resolve unnamed labels when assembly is done, so it is an error
64** if a label is still undefined in this phase.
65*/
66
67void ULabDone (void);
68/* Run through all unnamed labels, check for anomalies and errors and do
69** necessary cleanups.
70*/
71
72
73
74/* End of ulabel.h */
75
76#endif
77