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) |
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) |
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 | |