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0f2d19dd JB |
1 | /* classes: h_files */ |
2 | ||
3 | #ifndef STRUCTH | |
4 | #define STRUCTH | |
5 | /* Copyright (C) 1995 Free Software Foundation, Inc. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2, or (at your option) | |
10 | * any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this software; see the file COPYING. If not, write to | |
19 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | * | |
21 | * As a special exception, the Free Software Foundation gives permission | |
22 | * for additional uses of the text contained in its release of GUILE. | |
23 | * | |
24 | * The exception is that, if you link the GUILE library with other files | |
25 | * to produce an executable, this does not by itself cause the | |
26 | * resulting executable to be covered by the GNU General Public License. | |
27 | * Your use of that executable is in no way restricted on account of | |
28 | * linking the GUILE library code into it. | |
29 | * | |
30 | * This exception does not however invalidate any other reasons why | |
31 | * the executable file might be covered by the GNU General Public License. | |
32 | * | |
33 | * This exception applies only to the code released by the | |
34 | * Free Software Foundation under the name GUILE. If you copy | |
35 | * code from other Free Software Foundation releases into a copy of | |
36 | * GUILE, as the General Public License permits, the exception does | |
37 | * not apply to the code that you add in this way. To avoid misleading | |
38 | * anyone as to the status of such modified files, you must delete | |
39 | * this exception notice from them. | |
40 | * | |
41 | * If you write modifications of your own for GUILE, it is your choice | |
42 | * whether to permit this exception to apply to your modifications. | |
43 | * If you do not wish that, delete this exception notice. | |
44 | */ | |
45 | \f | |
46 | ||
b4309c3c | 47 | #include "libguile/__scm.h" |
0f2d19dd JB |
48 | |
49 | \f | |
50 | ||
51 | /* These are how the initial words of a vtable are allocated. */ | |
52 | #define scm_struct_i_n_words -2 /* How many words allocated to this struct? */ | |
53 | #define scm_struct_i_tag -1 /* A unique tag for this type.. */ | |
54 | #define scm_struct_i_layout 0 /* A symbol describing the physical arrangement of this type. */ | |
55 | #define scm_struct_i_vcell 1 /* An opaque word, managed by the garbage collector. */ | |
56 | #define scm_struct_i_vtable 2 /* A pointer to the handle for this vtable. */ | |
57 | #define scm_struct_i_vtable_offset 3 /* Where do user fields start? */ | |
58 | ||
59 | ||
60 | #define SCM_STRUCTP(X) (SCM_TYP3(X) == scm_tc3_cons_gloc) | |
61 | #define SCM_STRUCT_DATA(X) ((SCM*)(SCM_CDR(X))) | |
62 | #define SCM_STRUCT_VTABLE_DATA(X) ((SCM *)(SCM_CAR(X) - 1)) | |
63 | #define SCM_STRUCT_LAYOUT(X) (SCM_STRUCT_VTABLE_DATA(X)[scm_struct_i_layout]) | |
64 | #define SCM_STRUCT_VTABLE(X) (SCM_STRUCT_VTABLE_DATA(X)[scm_struct_i_vtable]) | |
65 | ||
66 | ||
67 | \f | |
68 | #ifdef __STDC__ | |
69 | extern SCM scm_make_struct_layout (SCM fields); | |
70 | extern SCM scm_struct_p (SCM x); | |
71 | extern SCM scm_struct_vtable_p (SCM x); | |
72 | extern SCM scm_make_struct (SCM vtable, SCM tail_array_size, SCM init); | |
73 | extern SCM scm_make_vtable_vtable (SCM extra_fields, SCM tail_array_size, SCM init); | |
74 | extern SCM scm_struct_ref (SCM handle, SCM pos); | |
75 | extern SCM scm_struct_set_x (SCM handle, SCM pos, SCM val); | |
76 | extern SCM scm_struct_vtable (SCM handle); | |
77 | extern SCM scm_struct_vtable_tag (SCM handle); | |
78 | extern void scm_init_struct (void); | |
79 | ||
80 | #else /* STDC */ | |
81 | extern SCM scm_make_struct_layout (); | |
82 | extern SCM scm_struct_p (); | |
83 | extern SCM scm_struct_vtable_p (); | |
84 | extern SCM scm_make_struct (); | |
85 | extern SCM scm_make_vtable_vtable (); | |
86 | extern SCM scm_struct_ref (); | |
87 | extern SCM scm_struct_set_x (); | |
88 | extern SCM scm_struct_vtable (); | |
89 | extern SCM scm_struct_vtable_tag (); | |
90 | extern void scm_init_struct (); | |
91 | ||
92 | #endif /* STDC */ | |
93 | ||
94 | ||
95 | ||
96 | ||
97 | ||
98 | ||
99 | ||
100 | ||
101 | #endif /* STRUCTH */ |