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b7f3516f | 1 | /* Copyright (C) 1995,1996, 1997 Free Software Foundation, Inc. |
0f2d19dd JB |
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 | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
0f2d19dd JB |
41 | \f |
42 | ||
43 | #include <stdio.h> | |
44 | #include "_scm.h" | |
a7254b72 | 45 | #include "eq.h" |
20e6290e JB |
46 | #include "genio.h" |
47 | #include "smob.h" | |
0f2d19dd | 48 | |
20e6290e | 49 | #include "variable.h" |
0f2d19dd | 50 | \f |
1cc91f1b JB |
51 | |
52 | static scm_sizet free_var SCM_P ((SCM obj)); | |
53 | ||
0f2d19dd JB |
54 | static scm_sizet |
55 | free_var (obj) | |
56 | SCM obj; | |
0f2d19dd JB |
57 | { |
58 | return 0; | |
59 | } | |
60 | ||
61 | ||
1cc91f1b JB |
62 | |
63 | static int prin_var SCM_P ((SCM exp, SCM port, scm_print_state *pstate)); | |
64 | ||
0f2d19dd | 65 | static int |
9882ea19 | 66 | prin_var (exp, port, pstate) |
0f2d19dd JB |
67 | SCM exp; |
68 | SCM port; | |
9882ea19 | 69 | scm_print_state *pstate; |
0f2d19dd | 70 | { |
b7f3516f | 71 | scm_puts ("#<variable ", port); |
0f2d19dd JB |
72 | scm_intprint(exp, 16, port); |
73 | { | |
74 | SCM val_cell; | |
75 | val_cell = SCM_CDR(exp); | |
76 | if (SCM_CAR (val_cell) != SCM_UNDEFINED) | |
77 | { | |
b7f3516f | 78 | scm_puts (" name: ", port); |
9882ea19 | 79 | scm_iprin1 (SCM_CAR (val_cell), port, pstate); |
0f2d19dd | 80 | } |
b7f3516f | 81 | scm_puts (" binding: ", port); |
9882ea19 | 82 | scm_iprin1 (SCM_CDR (val_cell), port, pstate); |
0f2d19dd | 83 | } |
b7f3516f | 84 | scm_putc('>', port); |
0f2d19dd JB |
85 | return 1; |
86 | } | |
87 | ||
1cc91f1b JB |
88 | |
89 | static SCM scm_markvar SCM_P ((SCM ptr)); | |
90 | ||
0f2d19dd JB |
91 | static SCM |
92 | scm_markvar (ptr) | |
93 | SCM ptr; | |
0f2d19dd | 94 | { |
0f2d19dd JB |
95 | return SCM_CDR (ptr); |
96 | } | |
97 | ||
a7254b72 JB |
98 | static SCM var_equal SCM_P ((SCM var1, SCM var2)); |
99 | ||
100 | static SCM | |
101 | var_equal (var1, var2) | |
102 | SCM var1; | |
103 | SCM var2; | |
104 | { | |
105 | return scm_equal_p (SCM_CDR (var1), SCM_CDR (var2)); | |
106 | } | |
107 | ||
0f2d19dd | 108 | int scm_tc16_variable; |
a7254b72 | 109 | static scm_smobfuns variable_smob = {scm_markvar, free_var, prin_var, var_equal}; |
0f2d19dd JB |
110 | \f |
111 | ||
0179ae48 | 112 | static SCM anonymous_variable_sym; |
0f2d19dd | 113 | |
1cc91f1b JB |
114 | |
115 | static SCM make_vcell_variable SCM_P ((SCM vcell)); | |
116 | ||
0f2d19dd JB |
117 | static SCM |
118 | make_vcell_variable (vcell) | |
119 | SCM vcell; | |
0f2d19dd JB |
120 | { |
121 | SCM answer; | |
122 | SCM_NEWCELL(answer); | |
123 | SCM_REDEFER_INTS; | |
a6c64c3c MD |
124 | SCM_SETCAR (answer, scm_tc16_variable); |
125 | SCM_SETCDR (answer, vcell); | |
0f2d19dd JB |
126 | SCM_REALLOW_INTS; |
127 | return answer; | |
128 | } | |
129 | ||
0179ae48 | 130 | SCM_PROC(s_make_variable, "make-variable", 1, 1, 0, scm_make_variable); |
1cc91f1b | 131 | |
0f2d19dd JB |
132 | SCM |
133 | scm_make_variable (init, name_hint) | |
134 | SCM init; | |
135 | SCM name_hint; | |
0f2d19dd JB |
136 | { |
137 | SCM val_cell; | |
0179ae48 JB |
138 | |
139 | if (name_hint == SCM_UNDEFINED) | |
140 | name_hint = anonymous_variable_sym; | |
141 | ||
0f2d19dd JB |
142 | SCM_NEWCELL(val_cell); |
143 | SCM_DEFER_INTS; | |
a6c64c3c MD |
144 | SCM_SETCAR (val_cell, name_hint); |
145 | SCM_SETCDR (val_cell, init); | |
0f2d19dd JB |
146 | SCM_ALLOW_INTS; |
147 | return make_vcell_variable (val_cell); | |
148 | } | |
149 | ||
150 | ||
151 | SCM_PROC(s_make_undefined_variable, "make-undefined-variable", 0, 1, 0, scm_make_undefined_variable); | |
1cc91f1b | 152 | |
0f2d19dd JB |
153 | SCM |
154 | scm_make_undefined_variable (name_hint) | |
155 | SCM name_hint; | |
0f2d19dd JB |
156 | { |
157 | SCM vcell; | |
158 | ||
159 | if (name_hint == SCM_UNDEFINED) | |
0179ae48 | 160 | name_hint = anonymous_variable_sym; |
0f2d19dd JB |
161 | |
162 | SCM_NEWCELL (vcell); | |
163 | SCM_DEFER_INTS; | |
a6c64c3c MD |
164 | SCM_SETCAR (vcell, name_hint); |
165 | SCM_SETCDR (vcell, SCM_UNDEFINED); | |
0f2d19dd JB |
166 | SCM_ALLOW_INTS; |
167 | return make_vcell_variable (vcell); | |
168 | } | |
169 | ||
170 | ||
171 | SCM_PROC(s_variable_p, "variable?", 1, 0, 0, scm_variable_p); | |
1cc91f1b | 172 | |
0f2d19dd JB |
173 | SCM |
174 | scm_variable_p (obj) | |
175 | SCM obj; | |
0f2d19dd JB |
176 | { |
177 | return ( (SCM_NIMP(obj) && SCM_VARIABLEP (obj)) | |
178 | ? SCM_BOOL_T | |
179 | : SCM_BOOL_F); | |
180 | } | |
181 | ||
182 | ||
183 | SCM_PROC(s_variable_ref, "variable-ref", 1, 0, 0, scm_variable_ref); | |
1cc91f1b | 184 | |
0f2d19dd JB |
185 | SCM |
186 | scm_variable_ref (var) | |
187 | SCM var; | |
0f2d19dd JB |
188 | { |
189 | SCM_ASSERT (SCM_NIMP(var) && SCM_VARIABLEP(var), var, SCM_ARG1, s_variable_ref); | |
190 | return SCM_CDR (SCM_CDR (var)); | |
191 | } | |
192 | ||
193 | ||
194 | ||
195 | SCM_PROC(s_variable_set_x, "variable-set!", 2, 0, 0, scm_variable_set_x); | |
1cc91f1b | 196 | |
0f2d19dd JB |
197 | SCM |
198 | scm_variable_set_x (var, val) | |
199 | SCM var; | |
200 | SCM val; | |
0f2d19dd JB |
201 | { |
202 | SCM_ASSERT (SCM_NIMP(var) && SCM_VARIABLEP (var), var, SCM_ARG1, s_variable_set_x); | |
a6c64c3c | 203 | SCM_SETCDR (SCM_CDR (var), val); |
0f2d19dd JB |
204 | return SCM_UNSPECIFIED; |
205 | } | |
206 | ||
207 | ||
208 | SCM_PROC(s_builtin_variable, "builtin-variable", 1, 0, 0, scm_builtin_variable); | |
1cc91f1b | 209 | |
0f2d19dd JB |
210 | SCM |
211 | scm_builtin_variable (name) | |
212 | SCM name; | |
0f2d19dd JB |
213 | { |
214 | SCM vcell; | |
215 | SCM var_slot; | |
216 | ||
217 | SCM_ASSERT (SCM_NIMP (name) && SCM_SYMBOLP (name), name, SCM_ARG1, s_builtin_variable); | |
218 | vcell = scm_sym2vcell (name, SCM_BOOL_F, SCM_BOOL_T); | |
219 | if (vcell == SCM_BOOL_F) | |
220 | return SCM_BOOL_F; | |
221 | ||
222 | scm_intern_symbol (scm_symhash_vars, name); | |
223 | var_slot = scm_sym2ovcell (name, scm_symhash_vars); | |
224 | ||
225 | SCM_DEFER_INTS; | |
226 | if ( SCM_IMP (SCM_CDR (var_slot)) | |
227 | || (SCM_VARVCELL (var_slot) != vcell)) | |
a6c64c3c | 228 | SCM_SETCDR (var_slot, make_vcell_variable (vcell)); |
0f2d19dd JB |
229 | SCM_ALLOW_INTS; |
230 | ||
231 | return SCM_CDR (var_slot); | |
232 | } | |
233 | ||
234 | ||
235 | SCM_PROC(s_variable_bound_p, "variable-bound?", 1, 0, 0, scm_variable_bound_p); | |
1cc91f1b | 236 | |
0f2d19dd JB |
237 | SCM |
238 | scm_variable_bound_p (var) | |
239 | SCM var; | |
0f2d19dd JB |
240 | { |
241 | SCM_ASSERT (SCM_NIMP(var) && SCM_VARIABLEP (var), var, SCM_ARG1, s_variable_bound_p); | |
242 | return (SCM_UNBNDP (SCM_CDR (SCM_VARVCELL (var))) | |
243 | ? SCM_BOOL_F | |
244 | : SCM_BOOL_T); | |
245 | } | |
246 | ||
247 | ||
248 | ||
1cc91f1b | 249 | |
0f2d19dd JB |
250 | void |
251 | scm_init_variable () | |
0f2d19dd JB |
252 | { |
253 | scm_tc16_variable = scm_newsmob (&variable_smob); | |
0179ae48 | 254 | anonymous_variable_sym = SCM_CAR (scm_sysintern ("anonymous-variable", SCM_UNDEFINED)); |
0f2d19dd JB |
255 | #include "variable.x" |
256 | } | |
257 |