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1 /*****************************************************************************/
2 /*                                                                           */
3 /*                                  label.h                                  */
4 /*                                                                           */
5 /*                           Code label structure                            */
6 /*                                                                           */
7 /*                                                                           */
8 /*                                                                           */
9 /* (C) 2001     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 LABEL_H
37 #define LABEL_H
38
39
40
41 #include <stdio.h>
42
43 /* common */
44 #include "coll.h"
45
46
47
48 /*****************************************************************************/
49 /*                             struct CodeLabel                              */
50 /*****************************************************************************/
51
52
53
54 /* Label flags, bitmapped */
55 #define LF_DEF          0x0001U         /* Label was defined */
56 #define LF_EXT          0x0002U         /* Label is external */
57
58 /* Label structure */
59 typedef struct CodeLabel CodeLabel;
60 struct CodeLabel {
61     CodeLabel*          Next;           /* Next in hash list */
62     char*               Name;           /* Label name */
63     unsigned short      Hash;           /* Hash over the name */
64     unsigned short      Flags;          /* Flag flags */
65     struct CodeEntry*   Owner;          /* Owner entry */
66     Collection          JumpFrom;       /* Entries that jump here */
67 };
68
69
70
71 /*****************************************************************************/
72 /*                                   Code                                    */
73 /*****************************************************************************/
74
75
76
77 CodeLabel* NewCodeLabel (const char* Name, unsigned Hash);
78 /* Create a new code label, initialize and return it */
79
80 void FreeCodeLabel (CodeLabel* L);
81 /* Free the given code label */
82
83 void OutputCodeLabel (FILE* F, const CodeLabel* L);
84 /* Output the code label to a file */
85
86
87
88 /* End of label.h */
89 #endif
90
91
92