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80be163f | 1 | /* Copyright (C) 1995,1996,1998,2000,2001,2003,2004, 2006, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
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. | |
0f2d19dd | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
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 | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
0f2d19dd | 20 | \f |
dbb605f5 LC |
21 | #ifdef HAVE_CONFIG_H |
22 | # include <config.h> | |
23 | #endif | |
0f2d19dd | 24 | |
a0599745 MD |
25 | #include "libguile/_scm.h" |
26 | ||
27 | #include "libguile/alist.h" | |
28 | #include "libguile/eval.h" | |
29 | #include "libguile/procs.h" | |
30 | #include "libguile/gsubr.h" | |
5540e847 | 31 | #include "libguile/smob.h" |
a0599745 MD |
32 | #include "libguile/root.h" |
33 | #include "libguile/vectors.h" | |
203a92b6 | 34 | #include "libguile/weak-table.h" |
2fb924f6 | 35 | #include "libguile/programs.h" |
a0599745 MD |
36 | |
37 | #include "libguile/validate.h" | |
38 | #include "libguile/procprop.h" | |
0f2d19dd JB |
39 | \f |
40 | ||
c083a529 | 41 | SCM_GLOBAL_SYMBOL (scm_sym_system_procedure, "system-procedure"); |
fd12a19a | 42 | SCM_GLOBAL_SYMBOL (scm_sym_name, "name"); |
67e60655 | 43 | |
e1bdf9e2 | 44 | static SCM overrides; |
56164a5a | 45 | |
f3cf9421 AW |
46 | static SCM arity_overrides; |
47 | ||
314b8716 AW |
48 | int |
49 | scm_i_procedure_arity (SCM proc, int *req, int *opt, int *rest) | |
67e60655 | 50 | { |
f3cf9421 AW |
51 | SCM o; |
52 | ||
b2208d2e | 53 | o = scm_weak_table_refq (arity_overrides, proc, SCM_BOOL_F); |
f3cf9421 AW |
54 | |
55 | if (scm_is_true (o)) | |
56 | { | |
57 | *req = scm_to_int (scm_car (o)); | |
58 | *opt = scm_to_int (scm_cadr (o)); | |
59 | *rest = scm_is_true (scm_caddr (o)); | |
60 | return 1; | |
61 | } | |
62 | ||
75c3ed28 | 63 | while (!SCM_PROGRAM_P (proc)) |
67e60655 | 64 | { |
8b33752b | 65 | if (SCM_STRUCTP (proc)) |
75c3ed28 | 66 | { |
75c3ed28 AW |
67 | if (!SCM_STRUCT_APPLICABLE_P (proc)) |
68 | return 0; | |
69 | proc = SCM_STRUCT_PROCEDURE (proc); | |
75c3ed28 | 70 | } |
8b33752b AW |
71 | else if (SCM_HAS_TYP7 (proc, scm_tc7_smob)) |
72 | { | |
73 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
74 | return 0; | |
01e909d9 AW |
75 | if (!scm_i_program_arity (SCM_SMOB_DESCRIPTOR (proc).apply_trampoline, |
76 | req, opt, rest)) | |
77 | return 0; | |
78 | ||
79 | /* The trampoline gets the smob too, which users don't | |
80 | see. */ | |
81 | *req -= 1; | |
82 | ||
83 | return 1; | |
8b33752b AW |
84 | } |
85 | else | |
86 | return 0; | |
67e60655 | 87 | } |
f3cf9421 | 88 | |
75c3ed28 | 89 | return scm_i_program_arity (proc, req, opt, rest); |
67e60655 MD |
90 | } |
91 | ||
f3cf9421 AW |
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), | |
94 | "") | |
95 | #define FUNC_NAME s_scm_set_procedure_minimum_arity_x | |
96 | { | |
97 | int t SCM_UNUSED; | |
98 | ||
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); | |
103 | ||
b2208d2e | 104 | scm_weak_table_putq_x (arity_overrides, proc, scm_list_3 (req, opt, rest)); |
f3cf9421 AW |
105 | return SCM_UNDEFINED; |
106 | } | |
107 | #undef FUNC_NAME | |
108 | ||
cb2ce548 AW |
109 | SCM_DEFINE (scm_procedure_minimum_arity, "procedure-minimum-arity", 1, 0, 0, |
110 | (SCM proc), | |
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 | |
122 | { | |
123 | int req, opt, rest; | |
124 | ||
125 | if (scm_i_procedure_arity (proc, &req, &opt, &rest)) | |
126 | return scm_list_3 (scm_from_int (req), | |
127 | scm_from_int (opt), | |
128 | scm_from_bool (rest)); | |
129 | else | |
130 | return SCM_BOOL_F; | |
131 | } | |
132 | #undef FUNC_NAME | |
133 | ||
3b3b36dd | 134 | SCM_DEFINE (scm_procedure_properties, "procedure-properties", 1, 0, 0, |
1bbd0b84 | 135 | (SCM proc), |
b7e64f8b | 136 | "Return @var{proc}'s property list.") |
1bbd0b84 | 137 | #define FUNC_NAME s_scm_procedure_properties |
0f2d19dd | 138 | { |
314b8716 | 139 | SCM ret; |
56164a5a | 140 | |
34d19ef6 | 141 | SCM_VALIDATE_PROC (1, proc); |
314b8716 | 142 | |
203a92b6 | 143 | ret = scm_weak_table_refq (overrides, proc, SCM_BOOL_F); |
314b8716 | 144 | |
e1bdf9e2 AW |
145 | if (scm_is_false (ret)) |
146 | { | |
147 | if (SCM_PROGRAM_P (proc)) | |
07e424b7 | 148 | ret = scm_i_program_properties (proc); |
e1bdf9e2 AW |
149 | else |
150 | ret = SCM_EOL; | |
151 | } | |
152 | ||
3fc7e2c1 | 153 | return ret; |
0f2d19dd | 154 | } |
1bbd0b84 | 155 | #undef FUNC_NAME |
0f2d19dd | 156 | |
3b3b36dd | 157 | SCM_DEFINE (scm_set_procedure_properties_x, "set-procedure-properties!", 2, 0, 0, |
56164a5a AW |
158 | (SCM proc, SCM alist), |
159 | "Set @var{proc}'s property list to @var{alist}.") | |
1bbd0b84 | 160 | #define FUNC_NAME s_scm_set_procedure_properties_x |
0f2d19dd | 161 | { |
56164a5a AW |
162 | SCM_VALIDATE_PROC (1, proc); |
163 | ||
203a92b6 | 164 | scm_weak_table_putq_x (overrides, proc, alist); |
314b8716 | 165 | |
0f2d19dd JB |
166 | return SCM_UNSPECIFIED; |
167 | } | |
1bbd0b84 | 168 | #undef FUNC_NAME |
0f2d19dd | 169 | |
3b3b36dd | 170 | SCM_DEFINE (scm_procedure_property, "procedure-property", 2, 0, 0, |
56164a5a AW |
171 | (SCM proc, SCM key), |
172 | "Return the property of @var{proc} with name @var{key}.") | |
1bbd0b84 | 173 | #define FUNC_NAME s_scm_procedure_property |
0f2d19dd | 174 | { |
56164a5a AW |
175 | SCM_VALIDATE_PROC (1, proc); |
176 | ||
3fc7e2c1 | 177 | return scm_assq_ref (scm_procedure_properties (proc), key); |
0f2d19dd | 178 | } |
1bbd0b84 | 179 | #undef FUNC_NAME |
0f2d19dd | 180 | |
3b3b36dd | 181 | SCM_DEFINE (scm_set_procedure_property_x, "set-procedure-property!", 3, 0, 0, |
56164a5a AW |
182 | (SCM proc, SCM key, SCM val), |
183 | "In @var{proc}'s property list, set the property named @var{key} to\n" | |
184 | "@var{val}.") | |
1bbd0b84 | 185 | #define FUNC_NAME s_scm_set_procedure_property_x |
0f2d19dd | 186 | { |
90fa152c | 187 | SCM props; |
56164a5a | 188 | |
e1bdf9e2 | 189 | SCM_VALIDATE_PROC (1, proc); |
3fc7e2c1 | 190 | |
203a92b6 AW |
191 | scm_i_pthread_mutex_lock (&scm_i_misc_mutex); |
192 | props = scm_weak_table_refq (overrides, proc, SCM_BOOL_F); | |
f2ed4473 AW |
193 | if (scm_is_false (props)) |
194 | { | |
195 | if (SCM_PROGRAM_P (proc)) | |
196 | props = scm_i_program_properties (proc); | |
197 | else | |
198 | props = SCM_EOL; | |
199 | } | |
203a92b6 AW |
200 | scm_weak_table_putq_x (overrides, proc, scm_assq_set_x (props, key, val)); |
201 | scm_i_pthread_mutex_unlock (&scm_i_misc_mutex); | |
c783b082 | 202 | |
0f2d19dd JB |
203 | return SCM_UNSPECIFIED; |
204 | } | |
1bbd0b84 | 205 | #undef FUNC_NAME |
0f2d19dd JB |
206 | |
207 | \f | |
208 | ||
1cc91f1b | 209 | |
0f2d19dd JB |
210 | void |
211 | scm_init_procprop () | |
0f2d19dd | 212 | { |
203a92b6 | 213 | overrides = scm_c_make_weak_table (0, SCM_WEAK_TABLE_KIND_KEY); |
b2208d2e | 214 | arity_overrides = scm_c_make_weak_table (0, SCM_WEAK_TABLE_KIND_KEY); |
a0599745 | 215 | #include "libguile/procprop.x" |
0f2d19dd JB |
216 | } |
217 | ||
89e00824 ML |
218 | |
219 | /* | |
220 | Local Variables: | |
221 | c-file-style: "gnu" | |
222 | End: | |
223 | */ |