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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" |
f04d8caf | 51 | #include "ports.h" |
b90d369e | 52 | #include "procprop.h" |
26425129 | 53 | #include "smob.h" |
7ab3fdd5 | 54 | #include "strings.h" |
1330700c | 55 | |
b6791b2e | 56 | #include "validate.h" |
20e6290e JB |
57 | #include "feature.h" |
58 | ||
95b88819 GH |
59 | #ifdef HAVE_STRING_H |
60 | #include <string.h> | |
61 | #endif | |
0f2d19dd JB |
62 | \f |
63 | ||
f072db0c | 64 | static SCM *scm_loc_features; |
0f2d19dd | 65 | |
0f2d19dd | 66 | void |
6e8d25a6 | 67 | scm_add_feature (const char *str) |
0f2d19dd | 68 | { |
b90d369e MD |
69 | *scm_loc_features = scm_cons (SCM_CAR (scm_intern (str, strlen (str))), |
70 | *scm_loc_features); | |
0f2d19dd JB |
71 | } |
72 | ||
73 | ||
74 | \f | |
0b886892 | 75 | |
3b3b36dd | 76 | SCM_DEFINE (scm_program_arguments, "program-arguments", 0, 0, 0, |
1bbd0b84 GB |
77 | (), |
78 | "") | |
79 | #define FUNC_NAME s_scm_program_arguments | |
0f2d19dd JB |
80 | { |
81 | return scm_progargs; | |
82 | } | |
1bbd0b84 | 83 | #undef FUNC_NAME |
0f2d19dd | 84 | |
f29de790 JB |
85 | /* Set the value returned by program-arguments, given ARGC and ARGV. |
86 | ||
87 | If FIRST is non-zero, make it the first element; we do this in | |
88 | situations where other code (like getopt) has parsed out a few | |
89 | arguments, but we still want the script name to be the first | |
90 | element. */ | |
0b886892 | 91 | void |
1bbd0b84 | 92 | scm_set_program_arguments (int argc, char **argv, char *first) |
0b886892 JB |
93 | { |
94 | scm_progargs = scm_makfromstrs (argc, argv); | |
f29de790 JB |
95 | if (first) |
96 | scm_progargs = scm_cons (scm_makfrom0str (first), scm_progargs); | |
0b886892 JB |
97 | } |
98 | ||
0f2d19dd | 99 | |
0f2d19dd | 100 | \f |
36399a6d MD |
101 | /* Hooks |
102 | * | |
103 | * A hook is basically a list of procedures to be called at well defined | |
104 | * points in time. | |
105 | * | |
106 | * Hook name and arity are not full members of this type and therefore | |
107 | * lack accessors. They are added to aid debugging and are not | |
108 | * intended to be used in programs. | |
109 | * | |
110 | */ | |
1330700c | 111 | |
26425129 MD |
112 | long scm_tc16_hook; |
113 | ||
1330700c | 114 | |
36399a6d MD |
115 | static SCM |
116 | make_hook (SCM name, SCM n_args, const char *subr) | |
1330700c | 117 | { |
26425129 | 118 | int n; |
0c95b57d | 119 | SCM_ASSERT (SCM_FALSEP (name) || (SCM_SYMBOLP (name)), |
36399a6d MD |
120 | name, |
121 | SCM_ARG1, | |
122 | subr); | |
b90d369e | 123 | if (SCM_UNBNDP (n_args)) |
26425129 | 124 | n = 0; |
b90d369e | 125 | else |
26425129 | 126 | { |
36399a6d | 127 | SCM_ASSERT (SCM_INUMP (n_args), n_args, SCM_ARGn, subr); |
26425129 MD |
128 | n = SCM_INUM (n_args); |
129 | } | |
36399a6d MD |
130 | SCM_ASSERT (n >= 0 && n <= 16, n_args, SCM_OUTOFRANGE, subr); |
131 | SCM_RETURN_NEWSMOB (scm_tc16_hook + (n << 16), SCM_LIST1 (name)); | |
132 | } | |
133 | ||
134 | ||
135 | static int | |
136 | print_hook (SCM hook, SCM port, scm_print_state *pstate) | |
137 | { | |
138 | SCM ls, name; | |
139 | scm_puts ("#<hook ", port); | |
140 | if (SCM_NFALSEP (SCM_HOOK_NAME (hook))) | |
141 | { | |
142 | scm_iprin1 (SCM_HOOK_NAME (hook), port, pstate); | |
143 | scm_putc (' ', port); | |
144 | } | |
145 | scm_intprint (SCM_HOOK_ARITY (hook), 10, port); | |
146 | scm_putc (' ', port); | |
c209c88e | 147 | scm_intprint ((int)hook, 16, port); |
36399a6d MD |
148 | ls = SCM_HOOK_PROCEDURES (hook); |
149 | while (SCM_NIMP (ls)) | |
150 | { | |
151 | scm_putc (' ', port); | |
152 | name = scm_procedure_name (SCM_CAR (ls)); | |
153 | if (SCM_NFALSEP (name)) | |
154 | scm_iprin1 (name, port, pstate); | |
155 | else | |
156 | scm_putc ('?', port); | |
157 | ls = SCM_CDR (ls); | |
158 | } | |
159 | scm_putc ('>', port); | |
160 | return 1; | |
1330700c MD |
161 | } |
162 | ||
26425129 | 163 | |
1330700c | 164 | SCM |
36399a6d | 165 | scm_create_hook (const char* name, int n_args) |
1330700c | 166 | { |
36399a6d MD |
167 | SCM vcell = scm_sysintern0 (name); |
168 | SCM hook = make_hook (SCM_CAR (vcell), SCM_MAKINUM (n_args), | |
169 | "scm_create_hook"); | |
170 | SCM_SETCDR (vcell, hook); | |
171 | scm_protect_object (vcell); | |
1330700c MD |
172 | return hook; |
173 | } | |
174 | ||
26425129 | 175 | |
36399a6d MD |
176 | /* This function is deprecated. It will be removed in next release. */ |
177 | SCM | |
178 | scm_make_named_hook (const char* name, int n_args) | |
179 | { | |
180 | return scm_create_hook (name, n_args); | |
181 | } | |
182 | ||
183 | ||
a1ec6916 | 184 | SCM_DEFINE (scm_make_hook_with_name, "make-hook-with-name", 1, 1, 0, |
1bbd0b84 GB |
185 | (SCM name, SCM n_args), |
186 | "") | |
187 | #define FUNC_NAME s_scm_make_hook_with_name | |
36399a6d | 188 | { |
1bbd0b84 | 189 | return make_hook (name, n_args, FUNC_NAME); |
36399a6d | 190 | } |
1bbd0b84 | 191 | #undef FUNC_NAME |
36399a6d MD |
192 | |
193 | ||
a1ec6916 | 194 | SCM_DEFINE (scm_make_hook, "make-hook", 0, 1, 0, |
1bbd0b84 GB |
195 | (SCM n_args), |
196 | "") | |
197 | #define FUNC_NAME s_scm_make_hook | |
36399a6d | 198 | { |
1bbd0b84 | 199 | return make_hook (SCM_BOOL_F, n_args, FUNC_NAME); |
36399a6d | 200 | } |
1bbd0b84 | 201 | #undef FUNC_NAME |
36399a6d MD |
202 | |
203 | ||
a1ec6916 | 204 | SCM_DEFINE (scm_hook_p, "hook?", 1, 0, 0, |
1bbd0b84 GB |
205 | (SCM x), |
206 | "") | |
207 | #define FUNC_NAME s_scm_hook_p | |
26425129 | 208 | { |
0c95b57d | 209 | return SCM_BOOL(SCM_HOOKP (x)); |
26425129 | 210 | } |
1bbd0b84 | 211 | #undef FUNC_NAME |
26425129 MD |
212 | |
213 | ||
a1ec6916 | 214 | SCM_DEFINE (scm_hook_empty_p, "hook-empty?", 1, 0, 0, |
1bbd0b84 GB |
215 | (SCM hook), |
216 | "") | |
217 | #define FUNC_NAME s_scm_hook_empty_p | |
26425129 | 218 | { |
3b3b36dd | 219 | SCM_VALIDATE_HOOK (1,hook); |
1bbd0b84 | 220 | return SCM_BOOL(SCM_NULLP (SCM_HOOK_PROCEDURES (hook))); |
26425129 | 221 | } |
1bbd0b84 | 222 | #undef FUNC_NAME |
26425129 MD |
223 | |
224 | ||
a1ec6916 | 225 | SCM_DEFINE (scm_add_hook_x, "add-hook!", 2, 1, 0, |
1bbd0b84 GB |
226 | (SCM hook, SCM proc, SCM append_p), |
227 | "") | |
228 | #define FUNC_NAME s_scm_add_hook_x | |
1330700c | 229 | { |
b90d369e MD |
230 | SCM arity, rest; |
231 | int n_args; | |
3b3b36dd | 232 | SCM_VALIDATE_HOOK (1,hook); |
b90d369e | 233 | SCM_ASSERT (SCM_NFALSEP (arity = scm_i_procedure_arity (proc)), |
1bbd0b84 | 234 | proc, SCM_ARG2, FUNC_NAME); |
26425129 | 235 | n_args = SCM_HOOK_ARITY (hook); |
b90d369e MD |
236 | if (SCM_INUM (SCM_CAR (arity)) > n_args |
237 | || (SCM_FALSEP (SCM_CADDR (arity)) | |
238 | && (SCM_INUM (SCM_CAR (arity)) + SCM_INUM (SCM_CADR (arity)) | |
239 | < n_args))) | |
1834aa1b | 240 | scm_wrong_type_arg (FUNC_NAME, 2, proc); |
26425129 MD |
241 | rest = scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook)); |
242 | SCM_SET_HOOK_PROCEDURES (hook, | |
243 | (!SCM_UNBNDP (append_p) && SCM_NFALSEP (append_p) | |
244 | ? scm_append_x (SCM_LIST2 (rest, SCM_LIST1 (proc))) | |
245 | : scm_cons (proc, rest))); | |
1330700c MD |
246 | return SCM_UNSPECIFIED; |
247 | } | |
1bbd0b84 | 248 | #undef FUNC_NAME |
1330700c | 249 | |
26425129 | 250 | |
a1ec6916 | 251 | SCM_DEFINE (scm_remove_hook_x, "remove-hook!", 2, 0, 0, |
1bbd0b84 GB |
252 | (SCM hook, SCM proc), |
253 | "") | |
254 | #define FUNC_NAME s_scm_remove_hook_x | |
1330700c | 255 | { |
3b3b36dd | 256 | SCM_VALIDATE_HOOK (1,hook); |
26425129 MD |
257 | SCM_SET_HOOK_PROCEDURES (hook, |
258 | scm_delq_x (proc, SCM_HOOK_PROCEDURES (hook))); | |
1330700c MD |
259 | return SCM_UNSPECIFIED; |
260 | } | |
1bbd0b84 | 261 | #undef FUNC_NAME |
1330700c | 262 | |
26425129 | 263 | |
a1ec6916 | 264 | SCM_DEFINE (scm_reset_hook_x, "reset-hook!", 1, 0, 0, |
1bbd0b84 GB |
265 | (SCM hook), |
266 | "") | |
267 | #define FUNC_NAME s_scm_reset_hook_x | |
1330700c | 268 | { |
3b3b36dd | 269 | SCM_VALIDATE_HOOK (1,hook); |
26425129 | 270 | SCM_SET_HOOK_PROCEDURES (hook, SCM_EOL); |
b90d369e MD |
271 | return SCM_UNSPECIFIED; |
272 | } | |
1bbd0b84 | 273 | #undef FUNC_NAME |
b90d369e | 274 | |
26425129 | 275 | |
a1ec6916 | 276 | SCM_DEFINE (scm_run_hook, "run-hook", 1, 0, 1, |
1bbd0b84 GB |
277 | (SCM hook, SCM args), |
278 | "") | |
279 | #define FUNC_NAME s_scm_run_hook | |
b90d369e | 280 | { |
3b3b36dd | 281 | SCM_VALIDATE_HOOK (1,hook); |
b90d369e MD |
282 | if (SCM_UNBNDP (args)) |
283 | args = SCM_EOL; | |
26425129 | 284 | if (scm_ilength (args) != SCM_HOOK_ARITY (hook)) |
5d2d2ffc | 285 | SCM_MISC_ERROR ("Hook ~S requires ~A arguments", |
70d63753 | 286 | SCM_LIST2 (hook,SCM_MAKINUM (SCM_HOOK_ARITY (hook)))); |
ef1ae563 MD |
287 | scm_c_run_hook (hook, args); |
288 | return SCM_UNSPECIFIED; | |
289 | } | |
1bbd0b84 | 290 | #undef FUNC_NAME |
ef1ae563 | 291 | |
26425129 | 292 | |
ef1ae563 MD |
293 | void |
294 | scm_c_run_hook (SCM hook, SCM args) | |
295 | { | |
26425129 MD |
296 | SCM procs = SCM_HOOK_PROCEDURES (hook); |
297 | while (SCM_NIMP (procs)) | |
298 | { | |
299 | scm_apply (SCM_CAR (procs), args, SCM_EOL); | |
300 | procs = SCM_CDR (procs); | |
301 | } | |
302 | } | |
303 | ||
304 | ||
a1ec6916 | 305 | SCM_DEFINE (scm_hook_to_list, "hook->list", 1, 0, 0, |
1bbd0b84 | 306 | (SCM hook), |
717050c8 | 307 | "") |
1bbd0b84 | 308 | #define FUNC_NAME s_scm_hook_to_list |
26425129 | 309 | { |
3b3b36dd | 310 | SCM_VALIDATE_HOOK (1,hook); |
26425129 | 311 | return scm_list_copy (SCM_HOOK_PROCEDURES (hook)); |
1330700c | 312 | } |
1bbd0b84 | 313 | #undef FUNC_NAME |
1330700c | 314 | |
26425129 | 315 | |
1330700c | 316 | \f |
0f2d19dd | 317 | |
0f2d19dd JB |
318 | void |
319 | scm_init_feature() | |
0f2d19dd | 320 | { |
25d8012c | 321 | scm_loc_features = SCM_CDRLOC (scm_sysintern ("*features*", SCM_EOL)); |
cf7c17e9 | 322 | #ifdef SCM_RECKLESS |
0f2d19dd JB |
323 | scm_add_feature("reckless"); |
324 | #endif | |
325 | #ifndef _Windows | |
326 | scm_add_feature("system"); | |
327 | #endif | |
328 | #ifdef vms | |
329 | scm_add_feature(s_ed); | |
330 | #endif | |
331 | #ifdef SICP | |
332 | scm_add_feature("sicp"); | |
333 | #endif | |
334 | #ifndef GO32 | |
335 | scm_add_feature("char-ready?"); | |
336 | #endif | |
337 | #ifndef CHEAP_CONTINUATIONS | |
338 | scm_add_feature ("full-continuation"); | |
339 | #endif | |
a6cba733 MD |
340 | #ifdef USE_THREADS |
341 | scm_add_feature ("threads"); | |
342 | #endif | |
343 | ||
e2806c10 | 344 | scm_sysintern ("char-code-limit", SCM_MAKINUM (SCM_CHAR_CODE_LIMIT)); |
26425129 MD |
345 | |
346 | scm_tc16_hook = scm_make_smob_type ("hook", 0); | |
347 | scm_set_smob_mark (scm_tc16_hook, scm_markcdr); | |
36399a6d | 348 | scm_set_smob_print (scm_tc16_hook, print_hook); |
26425129 | 349 | |
0f2d19dd JB |
350 | #include "feature.x" |
351 | } |