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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. */ |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
0f2d19dd JB |
45 | \f |
46 | ||
47 | #include <stdio.h> | |
48 | #include "_scm.h" | |
49 | ||
1330700c | 50 | #include "eval.h" |
b90d369e | 51 | #include "procprop.h" |
26425129 | 52 | #include "smob.h" |
1330700c | 53 | |
1bbd0b84 | 54 | #include "scm_validate.h" |
20e6290e JB |
55 | #include "feature.h" |
56 | ||
95b88819 GH |
57 | #ifdef HAVE_STRING_H |
58 | #include <string.h> | |
59 | #endif | |
0f2d19dd JB |
60 | \f |
61 | ||
f072db0c | 62 | static SCM *scm_loc_features; |
0f2d19dd | 63 | |
0f2d19dd | 64 | void |
b90d369e | 65 | scm_add_feature (str) |
3eeba8d4 | 66 | const char* str; |
0f2d19dd | 67 | { |
b90d369e MD |
68 | *scm_loc_features = scm_cons (SCM_CAR (scm_intern (str, strlen (str))), |
69 | *scm_loc_features); | |
0f2d19dd JB |
70 | } |
71 | ||
72 | ||
73 | \f | |
0b886892 | 74 | |
1bbd0b84 GB |
75 | GUILE_PROC(scm_program_arguments, "program-arguments", 0, 0, 0, |
76 | (), | |
77 | "") | |
78 | #define FUNC_NAME s_scm_program_arguments | |
0f2d19dd JB |
79 | { |
80 | return scm_progargs; | |
81 | } | |
1bbd0b84 | 82 | #undef FUNC_NAME |
0f2d19dd | 83 | |
f29de790 JB |
84 | /* Set the value returned by program-arguments, given ARGC and ARGV. |
85 | ||
86 | If FIRST is non-zero, make it the first element; we do this in | |
87 | situations where other code (like getopt) has parsed out a few | |
88 | arguments, but we still want the script name to be the first | |
89 | element. */ | |
0b886892 | 90 | void |
1bbd0b84 | 91 | scm_set_program_arguments (int argc, char **argv, char *first) |
0b886892 JB |
92 | { |
93 | scm_progargs = scm_makfromstrs (argc, argv); | |
f29de790 JB |
94 | if (first) |
95 | scm_progargs = scm_cons (scm_makfrom0str (first), scm_progargs); | |
0b886892 JB |
96 | } |
97 | ||
0f2d19dd | 98 | |
0f2d19dd | 99 | \f |
36399a6d MD |
100 | /* Hooks |
101 | * | |
102 | * A hook is basically a list of procedures to be called at well defined | |
103 | * points in time. | |
104 | * | |
105 | * Hook name and arity are not full members of this type and therefore | |
106 | * lack accessors. They are added to aid debugging and are not | |
107 | * intended to be used in programs. | |
108 | * | |
109 | */ | |
1330700c | 110 | |
26425129 MD |
111 | long scm_tc16_hook; |
112 | ||
1330700c | 113 | |
36399a6d MD |
114 | static SCM |
115 | make_hook (SCM name, SCM n_args, const char *subr) | |
1330700c | 116 | { |
26425129 | 117 | int n; |
36399a6d MD |
118 | SCM_ASSERT (SCM_FALSEP (name) || (SCM_NIMP (name) && SCM_SYMBOLP (name)), |
119 | name, | |
120 | SCM_ARG1, | |
121 | subr); | |
b90d369e | 122 | if (SCM_UNBNDP (n_args)) |
26425129 | 123 | n = 0; |
b90d369e | 124 | else |
26425129 | 125 | { |
36399a6d | 126 | SCM_ASSERT (SCM_INUMP (n_args), n_args, SCM_ARGn, subr); |
26425129 MD |
127 | n = SCM_INUM (n_args); |
128 | } | |
36399a6d MD |
129 | SCM_ASSERT (n >= 0 && n <= 16, n_args, SCM_OUTOFRANGE, subr); |
130 | SCM_RETURN_NEWSMOB (scm_tc16_hook + (n << 16), SCM_LIST1 (name)); | |
131 | } | |
132 | ||
133 | ||
134 | static int | |
135 | print_hook (SCM hook, SCM port, scm_print_state *pstate) | |
136 | { | |
137 | SCM ls, name; | |
138 | scm_puts ("#<hook ", port); | |
139 | if (SCM_NFALSEP (SCM_HOOK_NAME (hook))) | |
140 | { | |
141 | scm_iprin1 (SCM_HOOK_NAME (hook), port, pstate); | |
142 | scm_putc (' ', port); | |
143 | } | |
144 | scm_intprint (SCM_HOOK_ARITY (hook), 10, port); | |
145 | scm_putc (' ', port); | |
146 | scm_intprint (hook, 16, port); | |
147 | ls = SCM_HOOK_PROCEDURES (hook); | |
148 | while (SCM_NIMP (ls)) | |
149 | { | |
150 | scm_putc (' ', port); | |
151 | name = scm_procedure_name (SCM_CAR (ls)); | |
152 | if (SCM_NFALSEP (name)) | |
153 | scm_iprin1 (name, port, pstate); | |
154 | else | |
155 | scm_putc ('?', port); | |
156 | ls = SCM_CDR (ls); | |
157 | } | |
158 | scm_putc ('>', port); | |
159 | return 1; | |
1330700c MD |
160 | } |
161 | ||
26425129 | 162 | |
1330700c | 163 | SCM |
36399a6d | 164 | scm_create_hook (const char* name, int n_args) |
1330700c | 165 | { |
36399a6d MD |
166 | SCM vcell = scm_sysintern0 (name); |
167 | SCM hook = make_hook (SCM_CAR (vcell), SCM_MAKINUM (n_args), | |
168 | "scm_create_hook"); | |
169 | SCM_SETCDR (vcell, hook); | |
170 | scm_protect_object (vcell); | |
1330700c MD |
171 | return hook; |
172 | } | |
173 | ||
26425129 | 174 | |
36399a6d MD |
175 | /* This function is deprecated. It will be removed in next release. */ |
176 | SCM | |
177 | scm_make_named_hook (const char* name, int n_args) | |
178 | { | |
179 | return scm_create_hook (name, n_args); | |
180 | } | |
181 | ||
182 | ||
1bbd0b84 GB |
183 | GUILE_PROC (scm_make_hook_with_name, "make-hook-with-name", 1, 1, 0, |
184 | (SCM name, SCM n_args), | |
185 | "") | |
186 | #define FUNC_NAME s_scm_make_hook_with_name | |
36399a6d | 187 | { |
1bbd0b84 | 188 | return make_hook (name, n_args, FUNC_NAME); |
36399a6d | 189 | } |
1bbd0b84 | 190 | #undef FUNC_NAME |
36399a6d MD |
191 | |
192 | ||
1bbd0b84 GB |
193 | GUILE_PROC (scm_make_hook, "make-hook", 0, 1, 0, |
194 | (SCM n_args), | |
195 | "") | |
196 | #define FUNC_NAME s_scm_make_hook | |
36399a6d | 197 | { |
1bbd0b84 | 198 | return make_hook (SCM_BOOL_F, n_args, FUNC_NAME); |
36399a6d | 199 | } |
1bbd0b84 | 200 | #undef FUNC_NAME |
36399a6d MD |
201 | |
202 | ||
1bbd0b84 GB |
203 | GUILE_PROC (scm_hook_p, "hook?", 1, 0, 0, |
204 | (SCM x), | |
205 | "") | |
206 | #define FUNC_NAME s_scm_hook_p | |
26425129 | 207 | { |
1bbd0b84 | 208 | return SCM_BOOL(SCM_NIMP (x) && SCM_HOOKP (x)); |
26425129 | 209 | } |
1bbd0b84 | 210 | #undef FUNC_NAME |
26425129 MD |
211 | |
212 | ||
1bbd0b84 GB |
213 | GUILE_PROC (scm_hook_empty_p, "hook-empty?", 1, 0, 0, |
214 | (SCM hook), | |
215 | "") | |
216 | #define FUNC_NAME s_scm_hook_empty_p | |
26425129 | 217 | { |
1bbd0b84 GB |
218 | SCM_VALIDATE_HOOK(1,hook); |
219 | return SCM_BOOL(SCM_NULLP (SCM_HOOK_PROCEDURES (hook))); | |
26425129 | 220 | } |
1bbd0b84 | 221 | #undef FUNC_NAME |
26425129 MD |
222 | |
223 | ||
1bbd0b84 GB |
224 | GUILE_PROC (scm_add_hook_x, "add-hook!", 2, 1, 0, |
225 | (SCM hook, SCM proc, SCM append_p), | |
226 | "") | |
227 | #define FUNC_NAME s_scm_add_hook_x | |
1330700c | 228 | { |
b90d369e MD |
229 | SCM arity, rest; |
230 | int n_args; | |
1bbd0b84 | 231 | SCM_VALIDATE_HOOK(1,hook); |
b90d369e | 232 | SCM_ASSERT (SCM_NFALSEP (arity = scm_i_procedure_arity (proc)), |
1bbd0b84 | 233 | proc, SCM_ARG2, FUNC_NAME); |
26425129 | 234 | n_args = SCM_HOOK_ARITY (hook); |
b90d369e MD |
235 | if (SCM_INUM (SCM_CAR (arity)) > n_args |
236 | || (SCM_FALSEP (SCM_CADDR (arity)) | |
237 | && (SCM_INUM (SCM_CAR (arity)) + SCM_INUM (SCM_CADR (arity)) | |
238 | < n_args))) | |
1bbd0b84 | 239 | scm_misc_error (FUNC_NAME, |
b90d369e | 240 | "This hook requires %s arguments", |
26425129 MD |
241 | SCM_LIST1 (SCM_MAKINUM (SCM_HOOK_ARITY (hook)))); |
242 | rest = scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook)); | |
243 | SCM_SET_HOOK_PROCEDURES (hook, | |
244 | (!SCM_UNBNDP (append_p) && SCM_NFALSEP (append_p) | |
245 | ? scm_append_x (SCM_LIST2 (rest, SCM_LIST1 (proc))) | |
246 | : scm_cons (proc, rest))); | |
1330700c MD |
247 | return SCM_UNSPECIFIED; |
248 | } | |
1bbd0b84 | 249 | #undef FUNC_NAME |
1330700c | 250 | |
26425129 | 251 | |
1bbd0b84 GB |
252 | GUILE_PROC (scm_remove_hook_x, "remove-hook!", 2, 0, 0, |
253 | (SCM hook, SCM proc), | |
254 | "") | |
255 | #define FUNC_NAME s_scm_remove_hook_x | |
1330700c | 256 | { |
1bbd0b84 | 257 | SCM_VALIDATE_HOOK(1,hook); |
26425129 MD |
258 | SCM_SET_HOOK_PROCEDURES (hook, |
259 | scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook))); | |
1330700c MD |
260 | return SCM_UNSPECIFIED; |
261 | } | |
1bbd0b84 | 262 | #undef FUNC_NAME |
1330700c | 263 | |
26425129 | 264 | |
1bbd0b84 GB |
265 | GUILE_PROC (scm_reset_hook_x, "reset-hook!", 1, 0, 0, |
266 | (SCM hook), | |
267 | "") | |
268 | #define FUNC_NAME s_scm_reset_hook_x | |
1330700c | 269 | { |
1bbd0b84 | 270 | SCM_VALIDATE_HOOK(1,hook); |
26425129 | 271 | SCM_SET_HOOK_PROCEDURES (hook, SCM_EOL); |
b90d369e MD |
272 | return SCM_UNSPECIFIED; |
273 | } | |
1bbd0b84 | 274 | #undef FUNC_NAME |
b90d369e | 275 | |
26425129 | 276 | |
1bbd0b84 GB |
277 | GUILE_PROC (scm_run_hook, "run-hook", 1, 0, 1, |
278 | (SCM hook, SCM args), | |
279 | "") | |
280 | #define FUNC_NAME s_scm_run_hook | |
b90d369e | 281 | { |
1bbd0b84 | 282 | SCM_VALIDATE_HOOK(1,hook); |
b90d369e MD |
283 | if (SCM_UNBNDP (args)) |
284 | args = SCM_EOL; | |
26425129 | 285 | if (scm_ilength (args) != SCM_HOOK_ARITY (hook)) |
1bbd0b84 | 286 | scm_misc_error (FUNC_NAME, |
b90d369e | 287 | "This hook requires %s arguments", |
26425129 | 288 | SCM_LIST1 (SCM_MAKINUM (SCM_HOOK_ARITY (hook)))); |
ef1ae563 MD |
289 | scm_c_run_hook (hook, args); |
290 | return SCM_UNSPECIFIED; | |
291 | } | |
1bbd0b84 | 292 | #undef FUNC_NAME |
ef1ae563 | 293 | |
26425129 | 294 | |
ef1ae563 MD |
295 | void |
296 | scm_c_run_hook (SCM hook, SCM args) | |
297 | { | |
26425129 MD |
298 | SCM procs = SCM_HOOK_PROCEDURES (hook); |
299 | while (SCM_NIMP (procs)) | |
300 | { | |
301 | scm_apply (SCM_CAR (procs), args, SCM_EOL); | |
302 | procs = SCM_CDR (procs); | |
303 | } | |
304 | } | |
305 | ||
306 | ||
1bbd0b84 GB |
307 | GUILE_PROC (scm_hook_to_list, "hook->list", 1, 0, 0, |
308 | (SCM hook), | |
309 | "") | |
310 | #define FUNC_NAME s_scm_hook_to_list | |
26425129 | 311 | { |
1bbd0b84 | 312 | SCM_VALIDATE_HOOK(1,hook); |
26425129 | 313 | return scm_list_copy (SCM_HOOK_PROCEDURES (hook)); |
1330700c | 314 | } |
1bbd0b84 | 315 | #undef FUNC_NAME |
1330700c | 316 | |
26425129 | 317 | |
1330700c | 318 | \f |
0f2d19dd | 319 | |
0f2d19dd JB |
320 | void |
321 | scm_init_feature() | |
0f2d19dd | 322 | { |
25d8012c | 323 | scm_loc_features = SCM_CDRLOC (scm_sysintern ("*features*", SCM_EOL)); |
cf7c17e9 | 324 | #ifdef SCM_RECKLESS |
0f2d19dd JB |
325 | scm_add_feature("reckless"); |
326 | #endif | |
327 | #ifndef _Windows | |
328 | scm_add_feature("system"); | |
329 | #endif | |
330 | #ifdef vms | |
331 | scm_add_feature(s_ed); | |
332 | #endif | |
333 | #ifdef SICP | |
334 | scm_add_feature("sicp"); | |
335 | #endif | |
336 | #ifndef GO32 | |
337 | scm_add_feature("char-ready?"); | |
338 | #endif | |
339 | #ifndef CHEAP_CONTINUATIONS | |
340 | scm_add_feature ("full-continuation"); | |
341 | #endif | |
a6cba733 MD |
342 | #ifdef USE_THREADS |
343 | scm_add_feature ("threads"); | |
344 | #endif | |
345 | ||
e2806c10 | 346 | scm_sysintern ("char-code-limit", SCM_MAKINUM (SCM_CHAR_CODE_LIMIT)); |
26425129 MD |
347 | |
348 | scm_tc16_hook = scm_make_smob_type ("hook", 0); | |
349 | scm_set_smob_mark (scm_tc16_hook, scm_markcdr); | |
36399a6d | 350 | scm_set_smob_print (scm_tc16_hook, print_hook); |
26425129 | 351 | |
0f2d19dd JB |
352 | #include "feature.x" |
353 | } |