Commit | Line | Data |
---|---|---|
0f2d19dd JB |
1 | /* Copyright (C) 1995,1996 Free Software Foundation, Inc. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
15 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
16 | * | |
17 | * As a special exception, the Free Software Foundation gives permission | |
18 | * for additional uses of the text contained in its release of GUILE. | |
19 | * | |
20 | * The exception is that, if you link the GUILE library with other files | |
21 | * to produce an executable, this does not by itself cause the | |
22 | * resulting executable to be covered by the GNU General Public License. | |
23 | * Your use of that executable is in no way restricted on account of | |
24 | * linking the GUILE library code into it. | |
25 | * | |
26 | * This exception does not however invalidate any other reasons why | |
27 | * the executable file might be covered by the GNU General Public License. | |
28 | * | |
29 | * This exception applies only to the code released by the | |
30 | * Free Software Foundation under the name GUILE. If you copy | |
31 | * code from other Free Software Foundation releases into a copy of | |
32 | * GUILE, as the General Public License permits, the exception does | |
33 | * not apply to the code that you add in this way. To avoid misleading | |
34 | * anyone as to the status of such modified files, you must delete | |
35 | * this exception notice from them. | |
36 | * | |
37 | * If you write modifications of your own for GUILE, it is your choice | |
38 | * whether to permit this exception to apply to your modifications. | |
39 | * If you do not wish that, delete this exception notice. | |
40 | */ | |
41 | \f | |
42 | ||
43 | #include <stdio.h> | |
44 | #include "_scm.h" | |
20e6290e JB |
45 | #include "genio.h" |
46 | #include "smob.h" | |
0f2d19dd | 47 | |
20e6290e | 48 | #include "variable.h" |
0f2d19dd | 49 | \f |
1cc91f1b JB |
50 | |
51 | static scm_sizet free_var SCM_P ((SCM obj)); | |
52 | ||
0f2d19dd JB |
53 | static scm_sizet |
54 | free_var (obj) | |
55 | SCM obj; | |
0f2d19dd JB |
56 | { |
57 | return 0; | |
58 | } | |
59 | ||
60 | ||
1cc91f1b JB |
61 | |
62 | static int prin_var SCM_P ((SCM exp, SCM port, scm_print_state *pstate)); | |
63 | ||
0f2d19dd | 64 | static int |
9882ea19 | 65 | prin_var (exp, port, pstate) |
0f2d19dd JB |
66 | SCM exp; |
67 | SCM port; | |
9882ea19 | 68 | scm_print_state *pstate; |
0f2d19dd JB |
69 | { |
70 | scm_gen_puts (scm_regular_string, "#<variable ", port); | |
71 | scm_intprint(exp, 16, port); | |
72 | { | |
73 | SCM val_cell; | |
74 | val_cell = SCM_CDR(exp); | |
75 | if (SCM_CAR (val_cell) != SCM_UNDEFINED) | |
76 | { | |
77 | scm_gen_puts (scm_regular_string, " name: ", port); | |
9882ea19 | 78 | scm_iprin1 (SCM_CAR (val_cell), port, pstate); |
0f2d19dd JB |
79 | } |
80 | scm_gen_puts (scm_regular_string, " binding: ", port); | |
9882ea19 | 81 | scm_iprin1 (SCM_CDR (val_cell), port, pstate); |
0f2d19dd JB |
82 | } |
83 | scm_gen_putc('>', port); | |
84 | return 1; | |
85 | } | |
86 | ||
1cc91f1b JB |
87 | |
88 | static SCM scm_markvar SCM_P ((SCM ptr)); | |
89 | ||
0f2d19dd JB |
90 | static SCM |
91 | scm_markvar (ptr) | |
92 | SCM ptr; | |
0f2d19dd JB |
93 | { |
94 | if (SCM_GC8MARKP (ptr)) | |
95 | return SCM_BOOL_F; | |
96 | SCM_SETGC8MARK (ptr); | |
97 | return SCM_CDR (ptr); | |
98 | } | |
99 | ||
100 | int scm_tc16_variable; | |
101 | static scm_smobfuns variable_smob = {scm_markvar, free_var, prin_var, 0}; | |
102 | \f | |
103 | ||
0179ae48 | 104 | static SCM anonymous_variable_sym; |
0f2d19dd | 105 | |
1cc91f1b JB |
106 | |
107 | static SCM make_vcell_variable SCM_P ((SCM vcell)); | |
108 | ||
0f2d19dd JB |
109 | static SCM |
110 | make_vcell_variable (vcell) | |
111 | SCM vcell; | |
0f2d19dd JB |
112 | { |
113 | SCM answer; | |
114 | SCM_NEWCELL(answer); | |
115 | SCM_REDEFER_INTS; | |
a6c64c3c MD |
116 | SCM_SETCAR (answer, scm_tc16_variable); |
117 | SCM_SETCDR (answer, vcell); | |
0f2d19dd JB |
118 | SCM_REALLOW_INTS; |
119 | return answer; | |
120 | } | |
121 | ||
0179ae48 | 122 | SCM_PROC(s_make_variable, "make-variable", 1, 1, 0, scm_make_variable); |
1cc91f1b | 123 | |
0f2d19dd JB |
124 | SCM |
125 | scm_make_variable (init, name_hint) | |
126 | SCM init; | |
127 | SCM name_hint; | |
0f2d19dd JB |
128 | { |
129 | SCM val_cell; | |
0179ae48 JB |
130 | |
131 | if (name_hint == SCM_UNDEFINED) | |
132 | name_hint = anonymous_variable_sym; | |
133 | ||
0f2d19dd JB |
134 | SCM_NEWCELL(val_cell); |
135 | SCM_DEFER_INTS; | |
a6c64c3c MD |
136 | SCM_SETCAR (val_cell, name_hint); |
137 | SCM_SETCDR (val_cell, init); | |
0f2d19dd JB |
138 | SCM_ALLOW_INTS; |
139 | return make_vcell_variable (val_cell); | |
140 | } | |
141 | ||
142 | ||
143 | SCM_PROC(s_make_undefined_variable, "make-undefined-variable", 0, 1, 0, scm_make_undefined_variable); | |
1cc91f1b | 144 | |
0f2d19dd JB |
145 | SCM |
146 | scm_make_undefined_variable (name_hint) | |
147 | SCM name_hint; | |
0f2d19dd JB |
148 | { |
149 | SCM vcell; | |
150 | ||
151 | if (name_hint == SCM_UNDEFINED) | |
0179ae48 | 152 | name_hint = anonymous_variable_sym; |
0f2d19dd JB |
153 | |
154 | SCM_NEWCELL (vcell); | |
155 | SCM_DEFER_INTS; | |
a6c64c3c MD |
156 | SCM_SETCAR (vcell, name_hint); |
157 | SCM_SETCDR (vcell, SCM_UNDEFINED); | |
0f2d19dd JB |
158 | SCM_ALLOW_INTS; |
159 | return make_vcell_variable (vcell); | |
160 | } | |
161 | ||
162 | ||
163 | SCM_PROC(s_variable_p, "variable?", 1, 0, 0, scm_variable_p); | |
1cc91f1b | 164 | |
0f2d19dd JB |
165 | SCM |
166 | scm_variable_p (obj) | |
167 | SCM obj; | |
0f2d19dd JB |
168 | { |
169 | return ( (SCM_NIMP(obj) && SCM_VARIABLEP (obj)) | |
170 | ? SCM_BOOL_T | |
171 | : SCM_BOOL_F); | |
172 | } | |
173 | ||
174 | ||
175 | SCM_PROC(s_variable_ref, "variable-ref", 1, 0, 0, scm_variable_ref); | |
1cc91f1b | 176 | |
0f2d19dd JB |
177 | SCM |
178 | scm_variable_ref (var) | |
179 | SCM var; | |
0f2d19dd JB |
180 | { |
181 | SCM_ASSERT (SCM_NIMP(var) && SCM_VARIABLEP(var), var, SCM_ARG1, s_variable_ref); | |
182 | return SCM_CDR (SCM_CDR (var)); | |
183 | } | |
184 | ||
185 | ||
186 | ||
187 | SCM_PROC(s_variable_set_x, "variable-set!", 2, 0, 0, scm_variable_set_x); | |
1cc91f1b | 188 | |
0f2d19dd JB |
189 | SCM |
190 | scm_variable_set_x (var, val) | |
191 | SCM var; | |
192 | SCM val; | |
0f2d19dd JB |
193 | { |
194 | SCM_ASSERT (SCM_NIMP(var) && SCM_VARIABLEP (var), var, SCM_ARG1, s_variable_set_x); | |
a6c64c3c | 195 | SCM_SETCDR (SCM_CDR (var), val); |
0f2d19dd JB |
196 | return SCM_UNSPECIFIED; |
197 | } | |
198 | ||
199 | ||
200 | SCM_PROC(s_builtin_variable, "builtin-variable", 1, 0, 0, scm_builtin_variable); | |
1cc91f1b | 201 | |
0f2d19dd JB |
202 | SCM |
203 | scm_builtin_variable (name) | |
204 | SCM name; | |
0f2d19dd JB |
205 | { |
206 | SCM vcell; | |
207 | SCM var_slot; | |
208 | ||
209 | SCM_ASSERT (SCM_NIMP (name) && SCM_SYMBOLP (name), name, SCM_ARG1, s_builtin_variable); | |
210 | vcell = scm_sym2vcell (name, SCM_BOOL_F, SCM_BOOL_T); | |
211 | if (vcell == SCM_BOOL_F) | |
212 | return SCM_BOOL_F; | |
213 | ||
214 | scm_intern_symbol (scm_symhash_vars, name); | |
215 | var_slot = scm_sym2ovcell (name, scm_symhash_vars); | |
216 | ||
217 | SCM_DEFER_INTS; | |
218 | if ( SCM_IMP (SCM_CDR (var_slot)) | |
219 | || (SCM_VARVCELL (var_slot) != vcell)) | |
a6c64c3c | 220 | SCM_SETCDR (var_slot, make_vcell_variable (vcell)); |
0f2d19dd JB |
221 | SCM_ALLOW_INTS; |
222 | ||
223 | return SCM_CDR (var_slot); | |
224 | } | |
225 | ||
226 | ||
227 | SCM_PROC(s_variable_bound_p, "variable-bound?", 1, 0, 0, scm_variable_bound_p); | |
1cc91f1b | 228 | |
0f2d19dd JB |
229 | SCM |
230 | scm_variable_bound_p (var) | |
231 | SCM var; | |
0f2d19dd JB |
232 | { |
233 | SCM_ASSERT (SCM_NIMP(var) && SCM_VARIABLEP (var), var, SCM_ARG1, s_variable_bound_p); | |
234 | return (SCM_UNBNDP (SCM_CDR (SCM_VARVCELL (var))) | |
235 | ? SCM_BOOL_F | |
236 | : SCM_BOOL_T); | |
237 | } | |
238 | ||
239 | ||
240 | ||
1cc91f1b | 241 | |
0f2d19dd JB |
242 | void |
243 | scm_init_variable () | |
0f2d19dd JB |
244 | { |
245 | scm_tc16_variable = scm_newsmob (&variable_smob); | |
0179ae48 | 246 | anonymous_variable_sym = SCM_CAR (scm_sysintern ("anonymous-variable", SCM_UNDEFINED)); |
0f2d19dd JB |
247 | #include "variable.x" |
248 | } | |
249 |