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78a0461a | 1 | /* Copyright (C) 1995, 1996, 1998, 1999 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" | |
45 | ||
1330700c | 46 | #include "eval.h" |
b90d369e | 47 | #include "procprop.h" |
26425129 | 48 | #include "smob.h" |
1330700c | 49 | |
20e6290e JB |
50 | #include "feature.h" |
51 | ||
95b88819 GH |
52 | #ifdef HAVE_STRING_H |
53 | #include <string.h> | |
54 | #endif | |
0f2d19dd JB |
55 | \f |
56 | ||
f072db0c | 57 | static SCM *scm_loc_features; |
0f2d19dd | 58 | |
0f2d19dd | 59 | void |
b90d369e | 60 | scm_add_feature (str) |
3eeba8d4 | 61 | const char* str; |
0f2d19dd | 62 | { |
b90d369e MD |
63 | *scm_loc_features = scm_cons (SCM_CAR (scm_intern (str, strlen (str))), |
64 | *scm_loc_features); | |
0f2d19dd JB |
65 | } |
66 | ||
67 | ||
68 | \f | |
0f2d19dd | 69 | SCM_PROC(s_program_arguments, "program-arguments", 0, 0, 0, scm_program_arguments); |
0b886892 | 70 | |
0f2d19dd JB |
71 | SCM |
72 | scm_program_arguments () | |
0f2d19dd JB |
73 | { |
74 | return scm_progargs; | |
75 | } | |
76 | ||
f29de790 JB |
77 | /* Set the value returned by program-arguments, given ARGC and ARGV. |
78 | ||
79 | If FIRST is non-zero, make it the first element; we do this in | |
80 | situations where other code (like getopt) has parsed out a few | |
81 | arguments, but we still want the script name to be the first | |
82 | element. */ | |
0b886892 | 83 | void |
f29de790 | 84 | scm_set_program_arguments (argc, argv, first) |
0b886892 JB |
85 | int argc; |
86 | char **argv; | |
f29de790 | 87 | char *first; |
0b886892 JB |
88 | { |
89 | scm_progargs = scm_makfromstrs (argc, argv); | |
f29de790 JB |
90 | if (first) |
91 | scm_progargs = scm_cons (scm_makfrom0str (first), scm_progargs); | |
0b886892 JB |
92 | } |
93 | ||
0f2d19dd | 94 | |
0f2d19dd | 95 | \f |
36399a6d MD |
96 | /* Hooks |
97 | * | |
98 | * A hook is basically a list of procedures to be called at well defined | |
99 | * points in time. | |
100 | * | |
101 | * Hook name and arity are not full members of this type and therefore | |
102 | * lack accessors. They are added to aid debugging and are not | |
103 | * intended to be used in programs. | |
104 | * | |
105 | */ | |
1330700c | 106 | |
26425129 MD |
107 | long scm_tc16_hook; |
108 | ||
1330700c | 109 | |
36399a6d MD |
110 | static SCM |
111 | make_hook (SCM name, SCM n_args, const char *subr) | |
1330700c | 112 | { |
26425129 | 113 | int n; |
36399a6d MD |
114 | SCM_ASSERT (SCM_FALSEP (name) || (SCM_NIMP (name) && SCM_SYMBOLP (name)), |
115 | name, | |
116 | SCM_ARG1, | |
117 | subr); | |
b90d369e | 118 | if (SCM_UNBNDP (n_args)) |
26425129 | 119 | n = 0; |
b90d369e | 120 | else |
26425129 | 121 | { |
36399a6d | 122 | SCM_ASSERT (SCM_INUMP (n_args), n_args, SCM_ARGn, subr); |
26425129 MD |
123 | n = SCM_INUM (n_args); |
124 | } | |
36399a6d MD |
125 | SCM_ASSERT (n >= 0 && n <= 16, n_args, SCM_OUTOFRANGE, subr); |
126 | SCM_RETURN_NEWSMOB (scm_tc16_hook + (n << 16), SCM_LIST1 (name)); | |
127 | } | |
128 | ||
129 | ||
130 | static int | |
131 | print_hook (SCM hook, SCM port, scm_print_state *pstate) | |
132 | { | |
133 | SCM ls, name; | |
134 | scm_puts ("#<hook ", port); | |
135 | if (SCM_NFALSEP (SCM_HOOK_NAME (hook))) | |
136 | { | |
137 | scm_iprin1 (SCM_HOOK_NAME (hook), port, pstate); | |
138 | scm_putc (' ', port); | |
139 | } | |
140 | scm_intprint (SCM_HOOK_ARITY (hook), 10, port); | |
141 | scm_putc (' ', port); | |
142 | scm_intprint (hook, 16, port); | |
143 | ls = SCM_HOOK_PROCEDURES (hook); | |
144 | while (SCM_NIMP (ls)) | |
145 | { | |
146 | scm_putc (' ', port); | |
147 | name = scm_procedure_name (SCM_CAR (ls)); | |
148 | if (SCM_NFALSEP (name)) | |
149 | scm_iprin1 (name, port, pstate); | |
150 | else | |
151 | scm_putc ('?', port); | |
152 | ls = SCM_CDR (ls); | |
153 | } | |
154 | scm_putc ('>', port); | |
155 | return 1; | |
1330700c MD |
156 | } |
157 | ||
26425129 | 158 | |
1330700c | 159 | SCM |
36399a6d | 160 | scm_create_hook (const char* name, int n_args) |
1330700c | 161 | { |
36399a6d MD |
162 | SCM vcell = scm_sysintern0 (name); |
163 | SCM hook = make_hook (SCM_CAR (vcell), SCM_MAKINUM (n_args), | |
164 | "scm_create_hook"); | |
165 | SCM_SETCDR (vcell, hook); | |
166 | scm_protect_object (vcell); | |
1330700c MD |
167 | return hook; |
168 | } | |
169 | ||
26425129 | 170 | |
36399a6d MD |
171 | /* This function is deprecated. It will be removed in next release. */ |
172 | SCM | |
173 | scm_make_named_hook (const char* name, int n_args) | |
174 | { | |
175 | return scm_create_hook (name, n_args); | |
176 | } | |
177 | ||
178 | ||
179 | SCM_PROC (s_make_hook_with_name, "make-hook-with-name", 1, 1, 0, scm_make_hook_with_name); | |
180 | ||
181 | SCM | |
182 | scm_make_hook_with_name (SCM name, SCM n_args) | |
183 | { | |
184 | return make_hook (name, n_args, s_make_hook_with_name); | |
185 | } | |
186 | ||
187 | ||
188 | SCM_PROC (s_make_hook, "make-hook", 0, 1, 0, scm_make_hook); | |
189 | ||
190 | SCM | |
191 | scm_make_hook (SCM n_args) | |
192 | { | |
193 | return make_hook (SCM_BOOL_F, n_args, s_make_hook); | |
194 | } | |
195 | ||
196 | ||
26425129 MD |
197 | SCM_PROC (s_hook_p, "hook?", 1, 0, 0, scm_hook_p); |
198 | ||
199 | SCM | |
200 | scm_hook_p (SCM x) | |
201 | { | |
202 | return SCM_NIMP (x) && SCM_HOOKP (x) ? SCM_BOOL_T : SCM_BOOL_F; | |
203 | } | |
204 | ||
205 | ||
206 | SCM_PROC (s_hook_empty_p, "hook-empty?", 1, 0, 0, scm_hook_empty_p); | |
207 | ||
208 | SCM | |
209 | scm_hook_empty_p (SCM hook) | |
210 | { | |
211 | SCM_ASSERT (SCM_NIMP (hook) && SCM_HOOKP (hook), | |
212 | hook, SCM_ARG1, s_hook_empty_p); | |
213 | return SCM_NULLP (SCM_HOOK_PROCEDURES (hook)) ? SCM_BOOL_T : SCM_BOOL_F; | |
214 | } | |
215 | ||
216 | ||
1330700c MD |
217 | SCM_PROC (s_add_hook_x, "add-hook!", 2, 1, 0, scm_add_hook_x); |
218 | ||
219 | SCM | |
b90d369e | 220 | scm_add_hook_x (SCM hook, SCM proc, SCM append_p) |
1330700c | 221 | { |
b90d369e MD |
222 | SCM arity, rest; |
223 | int n_args; | |
26425129 | 224 | SCM_ASSERT (SCM_NIMP (hook) && SCM_HOOKP (hook), |
1330700c | 225 | hook, SCM_ARG1, s_add_hook_x); |
b90d369e MD |
226 | SCM_ASSERT (SCM_NFALSEP (arity = scm_i_procedure_arity (proc)), |
227 | proc, SCM_ARG2, s_add_hook_x); | |
26425129 | 228 | n_args = SCM_HOOK_ARITY (hook); |
b90d369e MD |
229 | if (SCM_INUM (SCM_CAR (arity)) > n_args |
230 | || (SCM_FALSEP (SCM_CADDR (arity)) | |
231 | && (SCM_INUM (SCM_CAR (arity)) + SCM_INUM (SCM_CADR (arity)) | |
232 | < n_args))) | |
233 | scm_misc_error (s_add_hook_x, | |
234 | "This hook requires %s arguments", | |
26425129 MD |
235 | SCM_LIST1 (SCM_MAKINUM (SCM_HOOK_ARITY (hook)))); |
236 | rest = scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook)); | |
237 | SCM_SET_HOOK_PROCEDURES (hook, | |
238 | (!SCM_UNBNDP (append_p) && SCM_NFALSEP (append_p) | |
239 | ? scm_append_x (SCM_LIST2 (rest, SCM_LIST1 (proc))) | |
240 | : scm_cons (proc, rest))); | |
1330700c MD |
241 | return SCM_UNSPECIFIED; |
242 | } | |
243 | ||
26425129 | 244 | |
1330700c MD |
245 | SCM_PROC (s_remove_hook_x, "remove-hook!", 2, 0, 0, scm_remove_hook_x); |
246 | ||
247 | SCM | |
26425129 | 248 | scm_remove_hook_x (SCM hook, SCM proc) |
1330700c | 249 | { |
26425129 | 250 | SCM_ASSERT (SCM_NIMP (hook) && SCM_HOOKP (hook), |
b90d369e | 251 | hook, SCM_ARG1, s_remove_hook_x); |
26425129 MD |
252 | SCM_SET_HOOK_PROCEDURES (hook, |
253 | scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook))); | |
1330700c MD |
254 | return SCM_UNSPECIFIED; |
255 | } | |
256 | ||
26425129 | 257 | |
b90d369e | 258 | SCM_PROC (s_reset_hook_x, "reset-hook!", 1, 0, 0, scm_reset_hook_x); |
1330700c MD |
259 | |
260 | SCM | |
b90d369e | 261 | scm_reset_hook_x (SCM hook) |
1330700c | 262 | { |
26425129 | 263 | SCM_ASSERT (SCM_NIMP (hook) && SCM_HOOKP (hook), |
b90d369e | 264 | hook, SCM_ARG1, s_reset_hook_x); |
26425129 | 265 | SCM_SET_HOOK_PROCEDURES (hook, SCM_EOL); |
b90d369e MD |
266 | return SCM_UNSPECIFIED; |
267 | } | |
268 | ||
26425129 | 269 | |
b90d369e MD |
270 | SCM_PROC (s_run_hook, "run-hook", 1, 0, 1, scm_run_hook); |
271 | ||
272 | SCM | |
273 | scm_run_hook (SCM hook, SCM args) | |
274 | { | |
26425129 | 275 | SCM_ASSERT (SCM_NIMP (hook) && SCM_HOOKP (hook), |
b90d369e MD |
276 | hook, SCM_ARG1, s_run_hook); |
277 | if (SCM_UNBNDP (args)) | |
278 | args = SCM_EOL; | |
26425129 | 279 | if (scm_ilength (args) != SCM_HOOK_ARITY (hook)) |
b90d369e MD |
280 | scm_misc_error (s_add_hook_x, |
281 | "This hook requires %s arguments", | |
26425129 | 282 | SCM_LIST1 (SCM_MAKINUM (SCM_HOOK_ARITY (hook)))); |
ef1ae563 MD |
283 | scm_c_run_hook (hook, args); |
284 | return SCM_UNSPECIFIED; | |
285 | } | |
286 | ||
26425129 | 287 | |
ef1ae563 MD |
288 | void |
289 | scm_c_run_hook (SCM hook, SCM args) | |
290 | { | |
26425129 MD |
291 | SCM procs = SCM_HOOK_PROCEDURES (hook); |
292 | while (SCM_NIMP (procs)) | |
293 | { | |
294 | scm_apply (SCM_CAR (procs), args, SCM_EOL); | |
295 | procs = SCM_CDR (procs); | |
296 | } | |
297 | } | |
298 | ||
299 | ||
300 | SCM_PROC (s_hook_to_list, "hook->list", 1, 0, 0, scm_hook_to_list); | |
301 | ||
302 | SCM | |
303 | scm_hook_to_list (SCM hook) | |
304 | { | |
305 | SCM_ASSERT (SCM_NIMP (hook) && SCM_HOOKP (hook), | |
306 | hook, SCM_ARG1, s_hook_to_list); | |
307 | return scm_list_copy (SCM_HOOK_PROCEDURES (hook)); | |
1330700c MD |
308 | } |
309 | ||
26425129 | 310 | |
1330700c | 311 | \f |
0f2d19dd | 312 | |
0f2d19dd JB |
313 | void |
314 | scm_init_feature() | |
0f2d19dd | 315 | { |
25d8012c | 316 | scm_loc_features = SCM_CDRLOC (scm_sysintern ("*features*", SCM_EOL)); |
cf7c17e9 | 317 | #ifdef SCM_RECKLESS |
0f2d19dd JB |
318 | scm_add_feature("reckless"); |
319 | #endif | |
320 | #ifndef _Windows | |
321 | scm_add_feature("system"); | |
322 | #endif | |
323 | #ifdef vms | |
324 | scm_add_feature(s_ed); | |
325 | #endif | |
326 | #ifdef SICP | |
327 | scm_add_feature("sicp"); | |
328 | #endif | |
329 | #ifndef GO32 | |
330 | scm_add_feature("char-ready?"); | |
331 | #endif | |
332 | #ifndef CHEAP_CONTINUATIONS | |
333 | scm_add_feature ("full-continuation"); | |
334 | #endif | |
a6cba733 MD |
335 | #ifdef USE_THREADS |
336 | scm_add_feature ("threads"); | |
337 | #endif | |
338 | ||
e2806c10 | 339 | scm_sysintern ("char-code-limit", SCM_MAKINUM (SCM_CHAR_CODE_LIMIT)); |
26425129 MD |
340 | |
341 | scm_tc16_hook = scm_make_smob_type ("hook", 0); | |
342 | scm_set_smob_mark (scm_tc16_hook, scm_markcdr); | |
36399a6d | 343 | scm_set_smob_print (scm_tc16_hook, print_hook); |
26425129 | 344 | |
0f2d19dd JB |
345 | #include "feature.x" |
346 | } |