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fe2400c9 LC |
1 | /* Copyright (C) 1995, 1996, 1998, 2000, 2001, 2003, 2004, 2006, |
2 | * 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. | |
3 | * | |
73be1d9e | 4 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
5 | * modify it under the terms of the GNU Lesser General Public License |
6 | * as published by the Free Software Foundation; either version 3 of | |
7 | * the License, or (at your option) any later version. | |
0f2d19dd | 8 | * |
53befeb7 NJ |
9 | * This library is distributed in the hope that it will be useful, but |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. | |
0f2d19dd | 13 | * |
73be1d9e MV |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
17 | * 02110-1301 USA | |
73be1d9e | 18 | */ |
1bbd0b84 | 19 | |
1bbd0b84 | 20 | |
0f2d19dd | 21 | \f |
dbb605f5 LC |
22 | #ifdef HAVE_CONFIG_H |
23 | # include <config.h> | |
24 | #endif | |
0f2d19dd | 25 | |
3fc7e2c1 AW |
26 | #define SCM_BUILDING_DEPRECATED_CODE |
27 | ||
a0599745 MD |
28 | #include "libguile/_scm.h" |
29 | ||
30 | #include "libguile/alist.h" | |
3fc7e2c1 AW |
31 | #include "libguile/deprecation.h" |
32 | #include "libguile/deprecated.h" | |
a0599745 MD |
33 | #include "libguile/eval.h" |
34 | #include "libguile/procs.h" | |
35 | #include "libguile/gsubr.h" | |
5540e847 | 36 | #include "libguile/smob.h" |
a0599745 MD |
37 | #include "libguile/root.h" |
38 | #include "libguile/vectors.h" | |
82c76fd3 | 39 | #include "libguile/hashtab.h" |
2fb924f6 | 40 | #include "libguile/programs.h" |
a0599745 MD |
41 | |
42 | #include "libguile/validate.h" | |
43 | #include "libguile/procprop.h" | |
0f2d19dd JB |
44 | \f |
45 | ||
c083a529 | 46 | SCM_GLOBAL_SYMBOL (scm_sym_system_procedure, "system-procedure"); |
3fc7e2c1 | 47 | #if (SCM_ENABLE_DEPRECATED == 1) |
67e60655 | 48 | SCM_GLOBAL_SYMBOL (scm_sym_arity, "arity"); |
3fc7e2c1 | 49 | #endif |
fd12a19a | 50 | SCM_GLOBAL_SYMBOL (scm_sym_name, "name"); |
67e60655 | 51 | |
e1bdf9e2 AW |
52 | static SCM overrides; |
53 | static scm_i_pthread_mutex_t overrides_lock = SCM_I_PTHREAD_MUTEX_INITIALIZER; | |
56164a5a | 54 | |
f3cf9421 AW |
55 | static SCM arity_overrides; |
56 | ||
314b8716 AW |
57 | int |
58 | scm_i_procedure_arity (SCM proc, int *req, int *opt, int *rest) | |
67e60655 | 59 | { |
f3cf9421 AW |
60 | SCM o; |
61 | ||
62 | scm_i_pthread_mutex_lock (&overrides_lock); | |
63 | o = scm_hashq_ref (arity_overrides, proc, SCM_BOOL_F); | |
64 | scm_i_pthread_mutex_unlock (&overrides_lock); | |
65 | ||
66 | if (scm_is_true (o)) | |
67 | { | |
68 | *req = scm_to_int (scm_car (o)); | |
69 | *opt = scm_to_int (scm_cadr (o)); | |
70 | *rest = scm_is_true (scm_caddr (o)); | |
71 | return 1; | |
72 | } | |
73 | ||
75c3ed28 | 74 | while (!SCM_PROGRAM_P (proc)) |
67e60655 | 75 | { |
75c3ed28 | 76 | if (SCM_IMP (proc)) |
314b8716 | 77 | return 0; |
75c3ed28 AW |
78 | switch (SCM_TYP7 (proc)) |
79 | { | |
80 | case scm_tc7_smob: | |
81 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
82 | return 0; | |
83 | proc = scm_i_smob_apply_trampoline (proc); | |
84 | break; | |
85 | case scm_tcs_struct: | |
86 | if (!SCM_STRUCT_APPLICABLE_P (proc)) | |
87 | return 0; | |
88 | proc = SCM_STRUCT_PROCEDURE (proc); | |
89 | break; | |
90 | default: | |
91 | return 0; | |
92 | } | |
67e60655 | 93 | } |
f3cf9421 | 94 | |
75c3ed28 | 95 | return scm_i_program_arity (proc, req, opt, rest); |
67e60655 MD |
96 | } |
97 | ||
f3cf9421 AW |
98 | SCM_DEFINE (scm_set_procedure_minimum_arity_x, "set-procedure-minimum-arity!", |
99 | 4, 0, 0, (SCM proc, SCM req, SCM opt, SCM rest), | |
100 | "") | |
101 | #define FUNC_NAME s_scm_set_procedure_minimum_arity_x | |
102 | { | |
103 | int t SCM_UNUSED; | |
104 | ||
105 | SCM_VALIDATE_PROC (1, proc); | |
106 | SCM_VALIDATE_INT_COPY (2, req, t); | |
107 | SCM_VALIDATE_INT_COPY (3, opt, t); | |
108 | SCM_VALIDATE_BOOL (4, rest); | |
109 | ||
110 | scm_i_pthread_mutex_lock (&overrides_lock); | |
111 | scm_hashq_set_x (arity_overrides, proc, scm_list_3 (req, opt, rest)); | |
112 | scm_i_pthread_mutex_unlock (&overrides_lock); | |
113 | return SCM_UNDEFINED; | |
114 | } | |
115 | #undef FUNC_NAME | |
116 | ||
cb2ce548 AW |
117 | SCM_DEFINE (scm_procedure_minimum_arity, "procedure-minimum-arity", 1, 0, 0, |
118 | (SCM proc), | |
119 | "Return the \"minimum arity\" of a procedure.\n\n" | |
120 | "If the procedure has only one arity, that arity is returned\n" | |
121 | "as a list of three values: the number of required arguments,\n" | |
122 | "the number of optional arguments, and a boolean indicating\n" | |
123 | "whether or not the procedure takes rest arguments.\n\n" | |
124 | "For a case-lambda procedure, the arity returned is the one\n" | |
125 | "with the lowest minimum number of arguments, and the highest\n" | |
126 | "maximum number of arguments.\n\n" | |
127 | "If it was not possible to determine the arity of the procedure,\n" | |
128 | "@code{#f} is returned.") | |
129 | #define FUNC_NAME s_scm_procedure_minimum_arity | |
130 | { | |
131 | int req, opt, rest; | |
132 | ||
133 | if (scm_i_procedure_arity (proc, &req, &opt, &rest)) | |
134 | return scm_list_3 (scm_from_int (req), | |
135 | scm_from_int (opt), | |
136 | scm_from_bool (rest)); | |
137 | else | |
138 | return SCM_BOOL_F; | |
139 | } | |
140 | #undef FUNC_NAME | |
141 | ||
3b3b36dd | 142 | SCM_DEFINE (scm_procedure_properties, "procedure-properties", 1, 0, 0, |
1bbd0b84 | 143 | (SCM proc), |
b7e64f8b | 144 | "Return @var{proc}'s property list.") |
1bbd0b84 | 145 | #define FUNC_NAME s_scm_procedure_properties |
0f2d19dd | 146 | { |
314b8716 | 147 | SCM ret; |
56164a5a | 148 | |
34d19ef6 | 149 | SCM_VALIDATE_PROC (1, proc); |
314b8716 | 150 | |
e1bdf9e2 AW |
151 | scm_i_pthread_mutex_lock (&overrides_lock); |
152 | ret = scm_hashq_ref (overrides, proc, SCM_BOOL_F); | |
153 | scm_i_pthread_mutex_unlock (&overrides_lock); | |
314b8716 | 154 | |
e1bdf9e2 AW |
155 | if (scm_is_false (ret)) |
156 | { | |
157 | if (SCM_PROGRAM_P (proc)) | |
07e424b7 | 158 | ret = scm_i_program_properties (proc); |
e1bdf9e2 AW |
159 | else |
160 | ret = SCM_EOL; | |
161 | } | |
162 | ||
3fc7e2c1 AW |
163 | #if (SCM_ENABLE_DEPRECATED == 1) |
164 | ret = scm_acons (scm_sym_arity, scm_procedure_minimum_arity (proc), ret); | |
165 | #endif | |
314b8716 | 166 | |
3fc7e2c1 | 167 | return ret; |
0f2d19dd | 168 | } |
1bbd0b84 | 169 | #undef FUNC_NAME |
0f2d19dd | 170 | |
3b3b36dd | 171 | SCM_DEFINE (scm_set_procedure_properties_x, "set-procedure-properties!", 2, 0, 0, |
56164a5a AW |
172 | (SCM proc, SCM alist), |
173 | "Set @var{proc}'s property list to @var{alist}.") | |
1bbd0b84 | 174 | #define FUNC_NAME s_scm_set_procedure_properties_x |
0f2d19dd | 175 | { |
56164a5a AW |
176 | SCM_VALIDATE_PROC (1, proc); |
177 | ||
3fc7e2c1 | 178 | #if (SCM_ENABLE_DEPRECATED == 1) |
fe2400c9 | 179 | if (scm_is_true (scm_assq (scm_sym_arity, alist))) |
e1bdf9e2 | 180 | SCM_MISC_ERROR ("arity is a read-only property", SCM_EOL); |
3fc7e2c1 | 181 | #endif |
e1bdf9e2 AW |
182 | |
183 | scm_i_pthread_mutex_lock (&overrides_lock); | |
184 | scm_hashq_set_x (overrides, proc, alist); | |
185 | scm_i_pthread_mutex_unlock (&overrides_lock); | |
314b8716 | 186 | |
0f2d19dd JB |
187 | return SCM_UNSPECIFIED; |
188 | } | |
1bbd0b84 | 189 | #undef FUNC_NAME |
0f2d19dd | 190 | |
3b3b36dd | 191 | SCM_DEFINE (scm_procedure_property, "procedure-property", 2, 0, 0, |
56164a5a AW |
192 | (SCM proc, SCM key), |
193 | "Return the property of @var{proc} with name @var{key}.") | |
1bbd0b84 | 194 | #define FUNC_NAME s_scm_procedure_property |
0f2d19dd | 195 | { |
56164a5a AW |
196 | SCM_VALIDATE_PROC (1, proc); |
197 | ||
3fc7e2c1 | 198 | #if (SCM_ENABLE_DEPRECATED == 1) |
56164a5a | 199 | if (scm_is_eq (key, scm_sym_arity)) |
3fc7e2c1 AW |
200 | scm_c_issue_deprecation_warning |
201 | ("Accessing a procedure's arity via `procedure-property' is deprecated.\n" | |
202 | "Use `procedure-minimum-arity instead."); | |
203 | #endif | |
204 | ||
205 | return scm_assq_ref (scm_procedure_properties (proc), key); | |
0f2d19dd | 206 | } |
1bbd0b84 | 207 | #undef FUNC_NAME |
0f2d19dd | 208 | |
3b3b36dd | 209 | SCM_DEFINE (scm_set_procedure_property_x, "set-procedure-property!", 3, 0, 0, |
56164a5a AW |
210 | (SCM proc, SCM key, SCM val), |
211 | "In @var{proc}'s property list, set the property named @var{key} to\n" | |
212 | "@var{val}.") | |
1bbd0b84 | 213 | #define FUNC_NAME s_scm_set_procedure_property_x |
0f2d19dd | 214 | { |
90fa152c | 215 | SCM props; |
56164a5a | 216 | |
e1bdf9e2 | 217 | SCM_VALIDATE_PROC (1, proc); |
3fc7e2c1 AW |
218 | |
219 | #if (SCM_ENABLE_DEPRECATED == 1) | |
56164a5a | 220 | if (scm_is_eq (key, scm_sym_arity)) |
3fc7e2c1 AW |
221 | SCM_MISC_ERROR ("arity is a deprecated read-only property", SCM_EOL); |
222 | #endif | |
c783b082 | 223 | |
e1bdf9e2 | 224 | scm_i_pthread_mutex_lock (&overrides_lock); |
f2ed4473 AW |
225 | props = scm_hashq_ref (overrides, proc, SCM_BOOL_F); |
226 | if (scm_is_false (props)) | |
227 | { | |
228 | if (SCM_PROGRAM_P (proc)) | |
229 | props = scm_i_program_properties (proc); | |
230 | else | |
231 | props = SCM_EOL; | |
232 | } | |
90fa152c | 233 | scm_hashq_set_x (overrides, proc, scm_assq_set_x (props, key, val)); |
e1bdf9e2 | 234 | scm_i_pthread_mutex_unlock (&overrides_lock); |
c783b082 | 235 | |
0f2d19dd JB |
236 | return SCM_UNSPECIFIED; |
237 | } | |
1bbd0b84 | 238 | #undef FUNC_NAME |
0f2d19dd JB |
239 | |
240 | \f | |
241 | ||
1cc91f1b | 242 | |
0f2d19dd JB |
243 | void |
244 | scm_init_procprop () | |
0f2d19dd | 245 | { |
e1bdf9e2 | 246 | overrides = scm_make_weak_key_hash_table (SCM_UNDEFINED); |
f3cf9421 | 247 | arity_overrides = scm_make_weak_key_hash_table (SCM_UNDEFINED); |
a0599745 | 248 | #include "libguile/procprop.x" |
0f2d19dd JB |
249 | } |
250 | ||
89e00824 ML |
251 | |
252 | /* | |
253 | Local Variables: | |
254 | c-file-style: "gnu" | |
255 | End: | |
256 | */ |