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