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0f2d19dd JB |
1 | /* classes: h_files */ |
2 | ||
729dbac3 DH |
3 | #ifndef SCM_STRUCT_H |
4 | #define SCM_STRUCT_H | |
b29058ff | 5 | |
729dbac3 | 6 | /* Copyright (C) 1995,1997,1999,2000,2001 Free Software Foundation, Inc. |
b29058ff | 7 | * |
0f2d19dd JB |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2, or (at your option) | |
11 | * any later version. | |
b29058ff | 12 | * |
0f2d19dd JB |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
b29058ff | 17 | * |
0f2d19dd JB |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
20 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
21 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
22 | * |
23 | * As a special exception, the Free Software Foundation gives permission | |
24 | * for additional uses of the text contained in its release of GUILE. | |
25 | * | |
26 | * The exception is that, if you link the GUILE library with other files | |
27 | * to produce an executable, this does not by itself cause the | |
28 | * resulting executable to be covered by the GNU General Public License. | |
29 | * Your use of that executable is in no way restricted on account of | |
30 | * linking the GUILE library code into it. | |
31 | * | |
32 | * This exception does not however invalidate any other reasons why | |
33 | * the executable file might be covered by the GNU General Public License. | |
34 | * | |
35 | * This exception applies only to the code released by the | |
36 | * Free Software Foundation under the name GUILE. If you copy | |
37 | * code from other Free Software Foundation releases into a copy of | |
38 | * GUILE, as the General Public License permits, the exception does | |
39 | * not apply to the code that you add in this way. To avoid misleading | |
40 | * anyone as to the status of such modified files, you must delete | |
41 | * this exception notice from them. | |
42 | * | |
43 | * If you write modifications of your own for GUILE, it is your choice | |
44 | * whether to permit this exception to apply to your modifications. | |
82892bed | 45 | * If you do not wish that, delete this exception notice. */ |
d3a6bc94 | 46 | |
0f2d19dd JB |
47 | \f |
48 | ||
b4309c3c | 49 | #include "libguile/__scm.h" |
bafcafb2 | 50 | #include "libguile/print.h" |
0f2d19dd JB |
51 | |
52 | \f | |
53 | ||
2c36c351 | 54 | /* Number of words with negative index */ |
ad196599 | 55 | #define scm_struct_n_extra_words 4 |
2c53acd5 | 56 | #define scm_struct_entity_n_extra_words 6 |
2c36c351 | 57 | |
0f2d19dd | 58 | /* These are how the initial words of a vtable are allocated. */ |
2c53acd5 MD |
59 | #define scm_struct_i_setter -6 /* Setter */ |
60 | #define scm_struct_i_procedure -5 /* Optional procedure slot */ | |
ad196599 MD |
61 | #define scm_struct_i_free -4 /* Destructor */ |
62 | #define scm_struct_i_ptr -3 /* Start of block (see alloc_struct) */ | |
4bfdf158 | 63 | #define scm_struct_i_n_words -2 /* How many words allocated to this struct? */ |
ad196599 MD |
64 | #define scm_struct_i_size -1 /* Instance size */ |
65 | #define scm_struct_i_flags -1 /* Upper 12 bits used as flags */ | |
7866776c MV |
66 | |
67 | /* These indices must correspond to required_vtable_fields in | |
68 | struct.c. */ | |
4bfdf158 | 69 | #define scm_vtable_index_layout 0 /* A symbol describing the physical arrangement of this type. */ |
7866776c MV |
70 | #define scm_vtable_index_vtable 1 /* A pointer to the handle for this vtable. */ |
71 | #define scm_vtable_index_printer 2 /* A printer for this struct type. */ | |
72 | #define scm_vtable_offset_user 3 /* Where do user fields start? */ | |
0f2d19dd | 73 | |
4c9419ac | 74 | typedef void (*scm_t_struct_free) (scm_t_bits * vtable, scm_t_bits * data); |
ad196599 MD |
75 | |
76 | #define SCM_STRUCTF_MASK (0xFFF << 20) | |
f40f662e | 77 | #define SCM_STRUCTF_ENTITY (1L << 30) /* Indicates presence of proc slots */ |
7ee70a26 MD |
78 | #define SCM_STRUCTF_LIGHT (1L << 31) /* Light representation |
79 | (no hidden words) */ | |
0f2d19dd | 80 | |
b29058ff | 81 | #define SCM_STRUCTP(X) (!SCM_IMP(X) && (SCM_TYP3(X) == scm_tc3_struct)) |
92c2555f | 82 | #define SCM_STRUCT_DATA(X) ((scm_t_bits *) SCM_CELL_WORD_1 (X)) |
904a077d | 83 | #define SCM_STRUCT_VTABLE_DATA(X) ((scm_t_bits *) (SCM_CELL_WORD_0 (X) - scm_tc3_struct)) |
1c3e63f0 DH |
84 | |
85 | #define SCM_STRUCT_LAYOUT(X) (SCM_PACK (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_layout])) | |
86 | #define SCM_SET_STRUCT_LAYOUT(X, v) (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_layout] = SCM_UNPACK (v)) | |
87 | ||
88 | #define SCM_STRUCT_VTABLE(X) (SCM_PACK (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_vtable])) | |
00d8d838 DH |
89 | #define SCM_STRUCT_VTABLE_FLAGS(X) \ |
90 | (SCM_STRUCT_VTABLE_DATA (X) [scm_struct_i_flags]) | |
1c3e63f0 | 91 | #define SCM_STRUCT_PRINTER(X) (SCM_PACK (SCM_STRUCT_VTABLE_DATA (X) [scm_vtable_index_printer])) |
ce212434 | 92 | #define SCM_SET_STRUCT_PRINTER(x, v)\ |
729dbac3 | 93 | (SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_printer] = SCM_UNPACK (v)) |
92c2555f | 94 | #define SCM_SET_VTABLE_DESTRUCTOR(X, D) (SCM_STRUCT_DATA (X) [scm_struct_i_free] = (scm_t_bits) (D)) |
2c36c351 MD |
95 | /* Efficiency is important in the following macro, since it's used in GC */ |
96 | #define SCM_LAYOUT_TAILP(X) (((X) & 32) == 0) /* R, W or O */ | |
0f2d19dd | 97 | |
6decd505 MD |
98 | #define SCM_STRUCT_TABLE_NAME(X) SCM_CAR (X) |
99 | #define SCM_SET_STRUCT_TABLE_NAME(X, NAME) SCM_SETCAR (X, NAME) | |
100 | #define SCM_STRUCT_TABLE_CLASS(X) SCM_CDR (X) | |
101 | #define SCM_SET_STRUCT_TABLE_CLASS(X, CLASS) SCM_SETCDR (X, CLASS) | |
33b001fd | 102 | SCM_API SCM scm_struct_table; |
0f2d19dd | 103 | |
85c21339 MD |
104 | #define SCM_STRUCT_GC_CHAIN(X) SCM_CELL_OBJECT_3 (X) |
105 | #define SCM_SET_STRUCT_GC_CHAIN(X, Y) SCM_SET_CELL_OBJECT_3 (X, Y) | |
ffd72400 | 106 | SCM_API SCM scm_i_structs_to_free; |
85c21339 | 107 | |
0f2d19dd | 108 | \f |
0f2d19dd | 109 | |
4c9419ac MV |
110 | SCM_API scm_t_bits * scm_alloc_struct (int n_words, int n_extra, |
111 | const char *what); | |
112 | SCM_API void scm_struct_free_0 (scm_t_bits * vtable, scm_t_bits * data); | |
113 | SCM_API void scm_struct_free_light (scm_t_bits * vtable, scm_t_bits * data); | |
114 | SCM_API void scm_struct_free_standard (scm_t_bits * vtable, scm_t_bits * data); | |
115 | SCM_API void scm_struct_free_entity (scm_t_bits * vtable, scm_t_bits * data); | |
33b001fd MV |
116 | SCM_API SCM scm_make_struct_layout (SCM fields); |
117 | SCM_API SCM scm_struct_p (SCM x); | |
118 | SCM_API SCM scm_struct_vtable_p (SCM x); | |
119 | SCM_API SCM scm_make_struct (SCM vtable, SCM tail_array_size, SCM init); | |
120 | SCM_API SCM scm_make_vtable_vtable (SCM extra_fields, SCM tail_array_size, SCM init); | |
121 | SCM_API SCM scm_struct_ref (SCM handle, SCM pos); | |
122 | SCM_API SCM scm_struct_set_x (SCM handle, SCM pos, SCM val); | |
123 | SCM_API SCM scm_struct_vtable (SCM handle); | |
124 | SCM_API SCM scm_struct_vtable_tag (SCM handle); | |
125 | SCM_API unsigned long scm_struct_ihashq (SCM obj, unsigned long n); | |
126 | SCM_API SCM scm_struct_create_handle (SCM obj); | |
127 | SCM_API SCM scm_struct_vtable_name (SCM vtable); | |
128 | SCM_API SCM scm_set_struct_vtable_name_x (SCM vtable, SCM name); | |
129 | SCM_API void scm_print_struct (SCM exp, SCM port, scm_print_state *); | |
130 | SCM_API void scm_struct_prehistory (void); | |
131 | SCM_API void scm_init_struct (void); | |
0f2d19dd | 132 | |
729dbac3 | 133 | #endif /* SCM_STRUCT_H */ |
89e00824 ML |
134 | |
135 | /* | |
136 | Local Variables: | |
137 | c-file-style: "gnu" | |
138 | End: | |
139 | */ |