1 /* Copyright (C) 1995,1996,1998,2000,2001,2003,2004, 2006, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
3 * This library is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU Lesser General Public License
5 * as published by the Free Software Foundation; either version 3 of
6 * the License, or (at your option) any later version.
8 * This library is distributed in the hope that it will be useful, but
9 * 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.
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
25 #include "libguile/_scm.h"
27 #include "libguile/alist.h"
28 #include "libguile/eval.h"
29 #include "libguile/procs.h"
30 #include "libguile/gsubr.h"
31 #include "libguile/smob.h"
32 #include "libguile/root.h"
33 #include "libguile/vectors.h"
34 #include "libguile/weak-table.h"
35 #include "libguile/programs.h"
37 #include "libguile/validate.h"
38 #include "libguile/procprop.h"
41 SCM_GLOBAL_SYMBOL (scm_sym_system_procedure
, "system-procedure");
42 SCM_GLOBAL_SYMBOL (scm_sym_name
, "name");
46 static SCM arity_overrides
;
49 scm_i_procedure_arity (SCM proc
, int *req
, int *opt
, int *rest
)
53 o
= scm_weak_table_refq (arity_overrides
, proc
, SCM_BOOL_F
);
57 *req
= scm_to_int (scm_car (o
));
58 *opt
= scm_to_int (scm_cadr (o
));
59 *rest
= scm_is_true (scm_caddr (o
));
63 while (!SCM_PROGRAM_P (proc
) && !SCM_RTL_PROGRAM_P (proc
))
65 if (SCM_STRUCTP (proc
))
67 if (!SCM_STRUCT_APPLICABLE_P (proc
))
69 proc
= SCM_STRUCT_PROCEDURE (proc
);
71 else if (SCM_HAS_TYP7 (proc
, scm_tc7_smob
))
73 if (!SCM_SMOB_APPLICABLE_P (proc
))
75 if (!scm_i_program_arity (SCM_SMOB_DESCRIPTOR (proc
).apply_trampoline
,
79 /* The trampoline gets the smob too, which users don't
89 return scm_i_program_arity (proc
, req
, opt
, rest
);
92 SCM_DEFINE (scm_set_procedure_minimum_arity_x
, "set-procedure-minimum-arity!",
93 4, 0, 0, (SCM proc
, SCM req
, SCM opt
, SCM rest
),
95 #define FUNC_NAME s_scm_set_procedure_minimum_arity_x
99 SCM_VALIDATE_PROC (1, proc
);
100 SCM_VALIDATE_INT_COPY (2, req
, t
);
101 SCM_VALIDATE_INT_COPY (3, opt
, t
);
102 SCM_VALIDATE_BOOL (4, rest
);
104 scm_weak_table_putq_x (arity_overrides
, proc
, scm_list_3 (req
, opt
, rest
));
105 return SCM_UNDEFINED
;
109 SCM_DEFINE (scm_procedure_minimum_arity
, "procedure-minimum-arity", 1, 0, 0,
111 "Return the \"minimum arity\" of a procedure.\n\n"
112 "If the procedure has only one arity, that arity is returned\n"
113 "as a list of three values: the number of required arguments,\n"
114 "the number of optional arguments, and a boolean indicating\n"
115 "whether or not the procedure takes rest arguments.\n\n"
116 "For a case-lambda procedure, the arity returned is the one\n"
117 "with the lowest minimum number of arguments, and the highest\n"
118 "maximum number of arguments.\n\n"
119 "If it was not possible to determine the arity of the procedure,\n"
120 "@code{#f} is returned.")
121 #define FUNC_NAME s_scm_procedure_minimum_arity
125 if (scm_i_procedure_arity (proc
, &req
, &opt
, &rest
))
126 return scm_list_3 (scm_from_int (req
),
128 scm_from_bool (rest
));
134 SCM_DEFINE (scm_procedure_properties
, "procedure-properties", 1, 0, 0,
136 "Return @var{proc}'s property list.")
137 #define FUNC_NAME s_scm_procedure_properties
141 SCM_VALIDATE_PROC (1, proc
);
143 user_props
= scm_weak_table_refq (overrides
, proc
, SCM_BOOL_F
);
145 if (scm_is_pair (user_props
) && scm_is_true (scm_car (user_props
)))
146 return scm_cdr (user_props
);
148 if (SCM_PROGRAM_P (proc
))
149 ret
= scm_i_program_properties (proc
);
150 else if (SCM_RTL_PROGRAM_P (proc
))
151 ret
= scm_i_rtl_program_properties (proc
);
155 if (scm_is_pair (user_props
))
156 for (user_props
= scm_cdr (user_props
);
157 scm_is_pair (user_props
);
158 user_props
= scm_cdr (user_props
))
159 ret
= scm_assq_set_x (ret
, scm_caar (user_props
), scm_cdar (user_props
));
165 SCM_DEFINE (scm_set_procedure_properties_x
, "set-procedure-properties!", 2, 0, 0,
166 (SCM proc
, SCM alist
),
167 "Set @var{proc}'s property list to @var{alist}.")
168 #define FUNC_NAME s_scm_set_procedure_properties_x
170 SCM_VALIDATE_PROC (1, proc
);
172 scm_weak_table_putq_x (overrides
, proc
, scm_cons (SCM_BOOL_T
, alist
));
174 return SCM_UNSPECIFIED
;
178 SCM_DEFINE (scm_procedure_property
, "procedure-property", 2, 0, 0,
180 "Return the property of @var{proc} with name @var{key}.")
181 #define FUNC_NAME s_scm_procedure_property
185 SCM_VALIDATE_PROC (1, proc
);
187 if (scm_is_eq (key
, scm_sym_name
))
188 return scm_procedure_name (proc
);
189 if (scm_is_eq (key
, scm_sym_documentation
))
190 return scm_procedure_documentation (proc
);
192 user_props
= scm_weak_table_refq (overrides
, proc
, SCM_BOOL_F
);
193 if (scm_is_true (user_props
))
195 SCM pair
= scm_assq (key
, scm_cdr (user_props
));
196 if (scm_is_pair (pair
))
197 return scm_cdr (pair
);
198 if (scm_is_true (scm_car (user_props
)))
202 return scm_assq_ref (scm_procedure_properties (proc
), key
);
206 SCM_DEFINE (scm_set_procedure_property_x
, "set-procedure-property!", 3, 0, 0,
207 (SCM proc
, SCM key
, SCM val
),
208 "In @var{proc}'s property list, set the property named @var{key} to\n"
210 #define FUNC_NAME s_scm_set_procedure_property_x
212 SCM user_props
, override_p
;
214 SCM_VALIDATE_PROC (1, proc
);
216 scm_i_pthread_mutex_lock (&scm_i_misc_mutex
);
217 user_props
= scm_weak_table_refq (overrides
, proc
, SCM_BOOL_F
);
218 if (scm_is_false (user_props
))
220 override_p
= SCM_BOOL_F
;
221 user_props
= SCM_EOL
;
225 override_p
= scm_car (user_props
);
226 user_props
= scm_cdr (user_props
);
228 scm_weak_table_putq_x (overrides
, proc
,
229 scm_cons (override_p
,
230 scm_assq_set_x (user_props
, key
, val
)));
231 scm_i_pthread_mutex_unlock (&scm_i_misc_mutex
);
233 return SCM_UNSPECIFIED
;
240 SCM_SYMBOL (scm_sym_source
, "source");
243 SCM_DEFINE (scm_procedure_name
, "procedure-name", 1, 0, 0,
245 "Return the name of the procedure @var{proc}")
246 #define FUNC_NAME s_scm_procedure_name
250 SCM_VALIDATE_PROC (1, proc
);
252 user_props
= scm_weak_table_refq (overrides
, proc
, SCM_BOOL_F
);
253 if (scm_is_true (user_props
))
255 SCM pair
= scm_assq (scm_sym_name
, scm_cdr (user_props
));
256 if (scm_is_pair (pair
))
257 return scm_cdr (pair
);
258 if (scm_is_true (scm_car (user_props
)))
262 if (SCM_RTL_PROGRAM_P (proc
))
263 return scm_i_rtl_program_name (proc
);
264 else if (SCM_PROGRAM_P (proc
))
265 return scm_assq_ref (scm_i_program_properties (proc
), scm_sym_name
);
266 else if (SCM_STRUCTP (proc
) && SCM_STRUCT_APPLICABLE_P (proc
))
267 return scm_procedure_name (SCM_STRUCT_PROCEDURE (proc
));
274 SCM_GLOBAL_SYMBOL (scm_sym_documentation
, "documentation");
276 SCM_DEFINE (scm_procedure_documentation
, "procedure-documentation", 1, 0, 0,
278 "Return the documentation string associated with @code{proc}. By\n"
279 "convention, if a procedure contains more than one expression and the\n"
280 "first expression is a string constant, that string is assumed to contain\n"
281 "documentation for that procedure.")
282 #define FUNC_NAME s_scm_procedure_documentation
286 SCM_VALIDATE_PROC (1, proc
);
288 while (SCM_STRUCTP (proc
) && SCM_STRUCT_APPLICABLE_P (proc
))
289 proc
= SCM_STRUCT_PROCEDURE (proc
);
291 user_props
= scm_weak_table_refq (overrides
, proc
, SCM_BOOL_F
);
292 if (scm_is_true (user_props
))
294 SCM pair
= scm_assq (scm_sym_documentation
, scm_cdr (user_props
));
295 if (scm_is_pair (pair
))
296 return scm_cdr (pair
);
297 if (scm_is_true (scm_car (user_props
)))
301 if (SCM_RTL_PROGRAM_P (proc
))
302 return scm_i_rtl_program_documentation (proc
);
303 else if (SCM_PROGRAM_P (proc
))
304 return scm_assq_ref (scm_i_program_properties (proc
),
305 scm_sym_documentation
);
312 SCM_DEFINE (scm_procedure_source
, "procedure-source", 1, 0, 0,
314 "Return the source of the procedure @var{proc}.")
315 #define FUNC_NAME s_scm_procedure_source
318 SCM_VALIDATE_PROC (1, proc
);
322 src
= scm_procedure_property (proc
, scm_sym_source
);
323 if (scm_is_true (src
))
326 if (SCM_STRUCTP (proc
) && SCM_STRUCT_APPLICABLE_P (proc
)
327 && SCM_HEAP_OBJECT_P ((proc
= SCM_STRUCT_PROCEDURE (proc
))))
342 overrides
= scm_c_make_weak_table (0, SCM_WEAK_TABLE_KIND_KEY
);
343 arity_overrides
= scm_c_make_weak_table (0, SCM_WEAK_TABLE_KIND_KEY
);
344 #include "libguile/procprop.x"