1 /* Copyright (C) 1995,1996,1997,1999,2000,2001, 2006, 2008 Free Software Foundation, Inc.
2 *
3 * This library is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU Lesser General Public
5 * License as published by the Free Software Foundation; either
6 * version 2.1 of the License, or (at your option) any later version.
7 *
8 * This library 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 GNU
11 * Lesser General Public License for more details.
12 *
13 * You should have received a copy of the GNU Lesser General Public
14 * License along with this library; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16 */
17
18
19
20 #ifdef HAVE_CONFIG_H
21 # include <config.h>
22 #endif
23
24 #include "libguile/_scm.h"
25
26 #include "libguile/objects.h"
27 #include "libguile/strings.h"
28 #include "libguile/vectors.h"
29 #include "libguile/smob.h"
30 #include "libguile/deprecation.h"
31
32 #include "libguile/validate.h"
33 #include "libguile/procs.h"
34
35
36
37 /* {Procedures}
38 */
39
40 scm_t_subr_entry *scm_subr_table;
41
42 /* libguile contained approx. 700 primitive procedures on 24 Aug 1999. */
43
44 /* Increased to 800 on 2001-05-07 -- Guile now has 779 primitives on
45 startup, 786 with guile-readline. 'martin */
46
47 long scm_subr_table_size = 0;
48 long scm_subr_table_room = 800;
49
50 SCM
scm_c_make_subr(const char * name,long type,SCM (* fcn)())51 scm_c_make_subr (const char *name, long type, SCM (*fcn) ())
52 {
53 register SCM z;
54 long entry;
55
56 if (scm_subr_table_size == scm_subr_table_room)
57 {
58 long new_size = scm_subr_table_room * 3 / 2;
59 void *new_table
60 = scm_realloc ((char *) scm_subr_table,
61 sizeof (scm_t_subr_entry) * new_size);
62 scm_subr_table = new_table;
63 scm_subr_table_room = new_size;
64 }
65
66 entry = scm_subr_table_size;
67 z = scm_cell ((entry << 8) + type, (scm_t_bits) fcn);
68 scm_subr_table[entry].handle = z;
69 scm_subr_table[entry].name = scm_from_locale_symbol (name);
70 scm_subr_table[entry].generic = 0;
71 scm_subr_table[entry].properties = SCM_EOL;
72 scm_subr_table_size++;
73
74 return z;
75 }
76
77 SCM
scm_c_define_subr(const char * name,long type,SCM (* fcn)())78 scm_c_define_subr (const char *name, long type, SCM (*fcn) ())
79 {
80 SCM subr = scm_c_make_subr (name, type, fcn);
81 scm_define (SCM_SUBR_ENTRY(subr).name, subr);
82 return subr;
83 }
84
85 /* This function isn't currently used since subrs are never freed. */
86 /* *fixme* Need mutex here. */
87 void
scm_free_subr_entry(SCM subr)88 scm_free_subr_entry (SCM subr)
89 {
90 long entry = SCM_SUBRNUM (subr);
91 /* Move last entry in table to the free position */
92 scm_subr_table[entry] = scm_subr_table[scm_subr_table_size - 1];
93 SCM_SET_SUBRNUM (scm_subr_table[entry].handle, entry);
94 scm_subr_table_size--;
95 }
96
97 SCM
scm_c_make_subr_with_generic(const char * name,long type,SCM (* fcn)(),SCM * gf)98 scm_c_make_subr_with_generic (const char *name,
99 long type, SCM (*fcn) (), SCM *gf)
100 {
101 SCM subr = scm_c_make_subr (name, type, fcn);
102 SCM_SUBR_ENTRY(subr).generic = gf;
103 return subr;
104 }
105
106 SCM
scm_c_define_subr_with_generic(const char * name,long type,SCM (* fcn)(),SCM * gf)107 scm_c_define_subr_with_generic (const char *name,
108 long type, SCM (*fcn) (), SCM *gf)
109 {
110 SCM subr = scm_c_make_subr_with_generic (name, type, fcn, gf);
111 scm_define (SCM_SUBR_ENTRY(subr).name, subr);
112 return subr;
113 }
114
115 void
scm_mark_subr_table()116 scm_mark_subr_table ()
117 {
118 long i;
119 for (i = 0; i < scm_subr_table_size; ++i)
120 {
121 scm_gc_mark (scm_subr_table[i].name);
122 if (scm_subr_table[i].generic && *scm_subr_table[i].generic)
123 scm_gc_mark (*scm_subr_table[i].generic);
124 if (SCM_NIMP (scm_subr_table[i].properties))
125 scm_gc_mark (scm_subr_table[i].properties);
126 }
127 }
128
129
130 #ifdef CCLO
131 SCM
scm_makcclo(SCM proc,size_t len)132 scm_makcclo (SCM proc, size_t len)
133 {
134 scm_t_bits *base = scm_gc_malloc (len * sizeof (scm_t_bits),
135 "compiled closure");
136 unsigned long i;
137 SCM s;
138
139 for (i = 0; i < len; ++i)
140 base [i] = SCM_UNPACK (SCM_UNSPECIFIED);
141
142 s = scm_cell (SCM_MAKE_CCLO_TAG (len), (scm_t_bits) base);
143 SCM_SET_CCLO_SUBR (s, proc);
144 return s;
145 }
146
147 /* Undocumented debugging procedure */
148 #ifdef GUILE_DEBUG
149 SCM_DEFINE (scm_make_cclo, "make-cclo", 2, 0, 0,
150 (SCM proc, SCM len),
151 "Create a compiled closure for @var{proc}, which reserves\n"
152 "@var{len} objects for its usage.")
153 #define FUNC_NAME s_scm_make_cclo
154 {
155 return scm_makcclo (proc, scm_to_size_t (len));
156 }
157 #undef FUNC_NAME
158 #endif
159 #endif
160
161
162
163 SCM_DEFINE (scm_procedure_p, "procedure?", 1, 0, 0,
164 (SCM obj),
165 "Return @code{#t} if @var{obj} is a procedure.")
166 #define FUNC_NAME s_scm_procedure_p
167 {
168 if (SCM_NIMP (obj))
169 switch (SCM_TYP7 (obj))
170 {
171 case scm_tcs_struct:
172 if (!SCM_I_OPERATORP (obj))
173 break;
174 case scm_tcs_closures:
175 case scm_tcs_subrs:
176 #ifdef CCLO
177 case scm_tc7_cclo:
178 #endif
179 case scm_tc7_pws:
180 return SCM_BOOL_T;
181 case scm_tc7_smob:
182 return scm_from_bool (SCM_SMOB_DESCRIPTOR (obj).apply);
183 default:
184 return SCM_BOOL_F;
185 }
186 return SCM_BOOL_F;
187 }
188 #undef FUNC_NAME
189
190 SCM_DEFINE (scm_closure_p, "closure?", 1, 0, 0,
191 (SCM obj),
192 "Return @code{#t} if @var{obj} is a closure.")
193 #define FUNC_NAME s_scm_closure_p
194 {
195 return scm_from_bool (SCM_CLOSUREP (obj));
196 }
197 #undef FUNC_NAME
198
199 SCM_DEFINE (scm_thunk_p, "thunk?", 1, 0, 0,
200 (SCM obj),
201 "Return @code{#t} if @var{obj} is a thunk.")
202 #define FUNC_NAME s_scm_thunk_p
203 {
204 if (SCM_NIMP (obj))
205 {
206 again:
207 switch (SCM_TYP7 (obj))
208 {
209 case scm_tcs_closures:
210 return scm_from_bool (!scm_is_pair (SCM_CLOSURE_FORMALS (obj)));
211 case scm_tc7_subr_0:
212 case scm_tc7_subr_1o:
213 case scm_tc7_lsubr:
214 case scm_tc7_rpsubr:
215 case scm_tc7_asubr:
216 #ifdef CCLO
217 case scm_tc7_cclo:
218 #endif
219 return SCM_BOOL_T;
220 case scm_tc7_pws:
221 obj = SCM_PROCEDURE (obj);
222 goto again;
223 default:
224 ;
225 }
226 }
227 return SCM_BOOL_F;
228 }
229 #undef FUNC_NAME
230
231 /* Only used internally. */
232 int
scm_subr_p(SCM obj)233 scm_subr_p (SCM obj)
234 {
235 if (SCM_NIMP (obj))
236 switch (SCM_TYP7 (obj))
237 {
238 case scm_tcs_subrs:
239 return 1;
240 default:
241 ;
242 }
243 return 0;
244 }
245
246 SCM_DEFINE (scm_procedure_documentation, "procedure-documentation", 1, 0, 0,
247 (SCM proc),
248 "Return the documentation string associated with @code{proc}. By\n"
249 "convention, if a procedure contains more than one expression and the\n"
250 "first expression is a string constant, that string is assumed to contain\n"
251 "documentation for that procedure.")
252 #define FUNC_NAME s_scm_procedure_documentation
253 {
254 SCM code;
255 SCM_ASSERT (scm_is_true (scm_procedure_p (proc)),
256 proc, SCM_ARG1, FUNC_NAME);
257 switch (SCM_TYP7 (proc))
258 {
259 case scm_tcs_closures:
260 code = SCM_CLOSURE_BODY (proc);
261 if (scm_is_null (SCM_CDR (code)))
262 return SCM_BOOL_F;
263 code = SCM_CAR (code);
264 if (scm_is_string (code))
265 return code;
266 else
267 return SCM_BOOL_F;
268 default:
269 return SCM_BOOL_F;
270 /*
271 case scm_tcs_subrs:
272 #ifdef CCLO
273 case scm_tc7_cclo:
274 #endif
275 */
276 }
277 }
278 #undef FUNC_NAME
279
280
281 /* Procedure-with-setter
282 */
283
284 SCM_DEFINE (scm_procedure_with_setter_p, "procedure-with-setter?", 1, 0, 0,
285 (SCM obj),
286 "Return @code{#t} if @var{obj} is a procedure with an\n"
287 "associated setter procedure.")
288 #define FUNC_NAME s_scm_procedure_with_setter_p
289 {
290 return scm_from_bool(SCM_PROCEDURE_WITH_SETTER_P (obj));
291 }
292 #undef FUNC_NAME
293
294 SCM_DEFINE (scm_make_procedure_with_setter, "make-procedure-with-setter", 2, 0, 0,
295 (SCM procedure, SCM setter),
296 "Create a new procedure which behaves like @var{procedure}, but\n"
297 "with the associated setter @var{setter}.")
298 #define FUNC_NAME s_scm_make_procedure_with_setter
299 {
300 SCM_VALIDATE_PROC (1, procedure);
301 SCM_VALIDATE_PROC (2, setter);
302 return scm_double_cell (scm_tc7_pws,
303 SCM_UNPACK (procedure),
304 SCM_UNPACK (setter), 0);
305 }
306 #undef FUNC_NAME
307
308 SCM_DEFINE (scm_procedure, "procedure", 1, 0, 0,
309 (SCM proc),
310 "Return the procedure of @var{proc}, which must be either a\n"
311 "procedure with setter, or an operator struct.")
312 #define FUNC_NAME s_scm_procedure
313 {
314 SCM_VALIDATE_NIM (1, proc);
315 if (SCM_PROCEDURE_WITH_SETTER_P (proc))
316 return SCM_PROCEDURE (proc);
317 else if (SCM_STRUCTP (proc))
318 {
319 SCM_ASSERT (SCM_I_OPERATORP (proc), proc, SCM_ARG1, FUNC_NAME);
320 return proc;
321 }
322 SCM_WRONG_TYPE_ARG (1, proc);
323 return SCM_BOOL_F; /* not reached */
324 }
325 #undef FUNC_NAME
326
327 SCM_GPROC (s_setter, "setter", 1, 0, 0, scm_setter, g_setter);
328
329 SCM
scm_setter(SCM proc)330 scm_setter (SCM proc)
331 {
332 SCM_GASSERT1 (SCM_NIMP (proc), g_setter, proc, SCM_ARG1, s_setter);
333 if (SCM_PROCEDURE_WITH_SETTER_P (proc))
334 return SCM_SETTER (proc);
335 else if (SCM_STRUCTP (proc))
336 {
337 SCM setter;
338 SCM_GASSERT1 (SCM_I_OPERATORP (proc),
339 g_setter, proc, SCM_ARG1, s_setter);
340 setter = (SCM_I_ENTITYP (proc)
341 ? SCM_ENTITY_SETTER (proc)
342 : SCM_OPERATOR_SETTER (proc));
343 if (SCM_NIMP (setter))
344 return setter;
345 /* fall through */
346 }
347 SCM_WTA_DISPATCH_1 (g_setter, proc, SCM_ARG1, s_setter);
348 return SCM_BOOL_F; /* not reached */
349 }
350
351
352 void
scm_init_subr_table()353 scm_init_subr_table ()
354 {
355 scm_subr_table
356 = ((scm_t_subr_entry *)
357 scm_malloc (sizeof (scm_t_subr_entry) * scm_subr_table_room));
358 }
359
360 void
scm_init_procs()361 scm_init_procs ()
362 {
363 #include "libguile/procs.x"
364 }
365
366 /*
367 Local Variables:
368 c-file-style: "gnu"
369 End:
370 */
371