1 /*****************************************************************************/
2 /* */
3 /* codelab.h */
4 /* */
5 /* Code label structure */
6 /* */
7 /* */
8 /* */
9 /* (C) 2001-2009, 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 CODELAB_H
37 #define CODELAB_H
38
39
40
41 /* common */
42 #include "coll.h"
43
44
45
46 /*****************************************************************************/
47 /* Forwards */
48 /*****************************************************************************/
49
50
51
52 struct CodeEntry;
53
54
55
56 /*****************************************************************************/
57 /* struct CodeLabel */
58 /*****************************************************************************/
59
60
61
62 /* Label structure */
63 typedef struct CodeLabel CodeLabel;
64 struct CodeLabel {
65 CodeLabel* Next; /* Next in hash list */
66 char* Name; /* Label name */
67 unsigned Hash; /* Hash over the name */
68 struct CodeEntry* Owner; /* Owner entry */
69 Collection JumpFrom; /* Entries that jump here */
70 };
71
72
73
74 /*****************************************************************************/
75 /* Code */
76 /*****************************************************************************/
77
78
79
80 CodeLabel* NewCodeLabel (const char* Name, unsigned Hash);
81 /* Create a new code label, initialize and return it */
82
83 void FreeCodeLabel (CodeLabel* L);
84 /* Free the given code label */
85
86 #if defined(HAVE_INLINE)
CL_GetRefCount(const CodeLabel * L)87 INLINE unsigned CL_GetRefCount (const CodeLabel* L)
88 /* Get the number of references for this label */
89 {
90 return CollCount (&L->JumpFrom);
91 }
92 #else
93 # define CL_GetRefCount(L) CollCount (&(L)->JumpFrom)
94 #endif
95
96 #if defined(HAVE_INLINE)
CL_GetRef(CodeLabel * L,unsigned Index)97 INLINE struct CodeEntry* CL_GetRef (CodeLabel* L, unsigned Index)
98 /* Get a code entry referencing this label */
99 {
100 return CollAt (&L->JumpFrom, Index);
101 }
102 #else
103 # define CL_GetRef(L, Index) CollAt (&(L)->JumpFrom, (Index))
104 #endif
105
106 void CL_AddRef (CodeLabel* L, struct CodeEntry* E);
107 /* Let the CodeEntry E reference the label L */
108
109 void CL_MoveRefs (CodeLabel* OldLabel, CodeLabel* NewLabel);
110 /* Move all references to OldLabel to point to NewLabel. OldLabel will have no
111 ** more references on return.
112 */
113
114 void CL_Output (const CodeLabel* L);
115 /* Output the code label to the output file */
116
117
118
119 /* End of codelab.h */
120
121 #endif
122