Commit | Line | Data |
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82c76fd3 | 1 | /* Copyright (C) 1995,1996,1998,2000,2001,2003,2004 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e MV |
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. | |
0f2d19dd | 7 | * |
73be1d9e MV |
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. | |
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 | |
92205699 | 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 16 | */ |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
0f2d19dd JB |
19 | \f |
20 | ||
a0599745 MD |
21 | #include "libguile/_scm.h" |
22 | ||
23 | #include "libguile/alist.h" | |
24 | #include "libguile/eval.h" | |
25 | #include "libguile/procs.h" | |
26 | #include "libguile/gsubr.h" | |
27 | #include "libguile/objects.h" | |
5540e847 | 28 | #include "libguile/smob.h" |
a0599745 MD |
29 | #include "libguile/root.h" |
30 | #include "libguile/vectors.h" | |
82c76fd3 | 31 | #include "libguile/hashtab.h" |
a0599745 MD |
32 | |
33 | #include "libguile/validate.h" | |
34 | #include "libguile/procprop.h" | |
0f2d19dd JB |
35 | \f |
36 | ||
c083a529 | 37 | SCM_GLOBAL_SYMBOL (scm_sym_system_procedure, "system-procedure"); |
67e60655 MD |
38 | SCM_GLOBAL_SYMBOL (scm_sym_arity, "arity"); |
39 | ||
08906709 MD |
40 | SCM |
41 | scm_i_procedure_arity (SCM proc) | |
67e60655 MD |
42 | { |
43 | int a = 0, o = 0, r = 0; | |
08906709 MD |
44 | if (SCM_IMP (proc)) |
45 | return SCM_BOOL_F; | |
67e60655 MD |
46 | loop: |
47 | switch (SCM_TYP7 (proc)) | |
48 | { | |
49 | case scm_tc7_subr_1o: | |
50 | o = 1; | |
51 | case scm_tc7_subr_0: | |
52 | break; | |
53 | case scm_tc7_subr_2o: | |
54 | o = 1; | |
55 | case scm_tc7_subr_1: | |
14b18ed6 | 56 | case scm_tc7_dsubr: |
67e60655 | 57 | case scm_tc7_cxr: |
67e60655 MD |
58 | a += 1; |
59 | break; | |
60 | case scm_tc7_subr_2: | |
61 | a += 2; | |
62 | break; | |
63 | case scm_tc7_subr_3: | |
64 | a += 3; | |
65 | break; | |
66 | case scm_tc7_asubr: | |
67 | case scm_tc7_rpsubr: | |
68 | case scm_tc7_lsubr: | |
69 | r = 1; | |
91517e28 | 70 | break; |
67e60655 MD |
71 | case scm_tc7_lsubr_2: |
72 | a += 2; | |
91517e28 | 73 | r = 1; |
67e60655 | 74 | break; |
5540e847 | 75 | case scm_tc7_smob: |
68b06924 | 76 | if (SCM_SMOB_APPLICABLE_P (proc)) |
362306b9 DH |
77 | { |
78 | int type = SCM_SMOB_DESCRIPTOR (proc).gsubr_type; | |
79 | a += SCM_GSUBR_REQ (type); | |
80 | o = SCM_GSUBR_OPT (type); | |
81 | r = SCM_GSUBR_REST (type); | |
82 | break; | |
83 | } | |
84 | else | |
85 | { | |
5540e847 | 86 | return SCM_BOOL_F; |
362306b9 DH |
87 | } |
88 | case scm_tc7_cclo: | |
bc36d050 | 89 | if (scm_is_eq (SCM_CCLO_SUBR (proc), scm_f_gsubr_apply)) |
67e60655 | 90 | { |
e11e83f3 | 91 | int type = scm_to_int (SCM_GSUBR_TYPE (proc)); |
08906709 | 92 | a += SCM_GSUBR_REQ (type); |
67e60655 MD |
93 | o = SCM_GSUBR_OPT (type); |
94 | r = SCM_GSUBR_REST (type); | |
95 | break; | |
96 | } | |
362306b9 DH |
97 | else |
98 | { | |
99 | proc = SCM_CCLO_SUBR (proc); | |
100 | a -= 1; | |
101 | goto loop; | |
102 | } | |
dec118c8 MD |
103 | case scm_tc7_pws: |
104 | proc = SCM_PROCEDURE (proc); | |
105 | goto loop; | |
67e60655 | 106 | case scm_tcs_closures: |
726d810a | 107 | proc = SCM_CLOSURE_FORMALS (proc); |
d2e53ed6 | 108 | if (scm_is_null (proc)) |
67e60655 | 109 | break; |
d2e53ed6 | 110 | while (scm_is_pair (proc)) |
67e60655 MD |
111 | { |
112 | ++a; | |
113 | proc = SCM_CDR (proc); | |
114 | } | |
d2e53ed6 | 115 | if (!scm_is_null (proc)) |
67e60655 MD |
116 | r = 1; |
117 | break; | |
904a077d | 118 | case scm_tcs_struct: |
815ce8d5 MD |
119 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
120 | { | |
121 | r = 1; | |
122 | break; | |
123 | } | |
124 | else if (!SCM_I_OPERATORP (proc)) | |
08906709 | 125 | return SCM_BOOL_F; |
815ce8d5 MD |
126 | proc = (SCM_I_ENTITYP (proc) |
127 | ? SCM_ENTITY_PROCEDURE (proc) | |
128 | : SCM_OPERATOR_PROCEDURE (proc)); | |
129 | a -= 1; | |
130 | goto loop; | |
08906709 MD |
131 | default: |
132 | return SCM_BOOL_F; | |
67e60655 | 133 | } |
e11e83f3 | 134 | return scm_list_3 (scm_from_int (a), scm_from_int (o), scm_from_bool(r)); |
67e60655 MD |
135 | } |
136 | ||
ece721f0 MV |
137 | /* XXX - instead of using a stand-in value for everything except |
138 | closures, we should find other ways to store the procedure | |
139 | properties for those other kinds of procedures. For example, subrs | |
140 | have their own property slot, which is unused at present. | |
141 | */ | |
142 | ||
0f2d19dd | 143 | static SCM |
1bbd0b84 | 144 | scm_stand_in_scm_proc(SCM proc) |
0f2d19dd | 145 | { |
82c76fd3 MV |
146 | SCM handle, answer; |
147 | handle = scm_hashq_get_handle (scm_stand_in_procs, proc); | |
148 | if (scm_is_false (handle)) | |
0f2d19dd | 149 | { |
1afff620 | 150 | answer = scm_closure (scm_list_2 (SCM_EOL, SCM_BOOL_F), SCM_EOL); |
82c76fd3 | 151 | scm_hashq_set_x (scm_stand_in_procs, proc, answer); |
0f2d19dd JB |
152 | } |
153 | else | |
82c76fd3 | 154 | answer = SCM_CDR (handle); |
0f2d19dd JB |
155 | return answer; |
156 | } | |
157 | ||
3b3b36dd | 158 | SCM_DEFINE (scm_procedure_properties, "procedure-properties", 1, 0, 0, |
1bbd0b84 | 159 | (SCM proc), |
b380b885 | 160 | "Return @var{obj}'s property list.") |
1bbd0b84 | 161 | #define FUNC_NAME s_scm_procedure_properties |
0f2d19dd | 162 | { |
34d19ef6 | 163 | SCM_VALIDATE_PROC (1, proc); |
67e60655 | 164 | return scm_acons (scm_sym_arity, scm_i_procedure_arity (proc), |
0c95b57d | 165 | SCM_PROCPROPS (SCM_CLOSUREP (proc) |
67e60655 MD |
166 | ? proc |
167 | : scm_stand_in_scm_proc (proc))); | |
0f2d19dd | 168 | } |
1bbd0b84 | 169 | #undef FUNC_NAME |
0f2d19dd | 170 | |
3b3b36dd | 171 | SCM_DEFINE (scm_set_procedure_properties_x, "set-procedure-properties!", 2, 0, 0, |
1bbd0b84 | 172 | (SCM proc, SCM new_val), |
b380b885 | 173 | "Set @var{obj}'s property list to @var{alist}.") |
1bbd0b84 | 174 | #define FUNC_NAME s_scm_set_procedure_properties_x |
0f2d19dd | 175 | { |
0c95b57d | 176 | if (!SCM_CLOSUREP (proc)) |
0f2d19dd | 177 | proc = scm_stand_in_scm_proc(proc); |
34d19ef6 | 178 | SCM_VALIDATE_CLOSURE (1, proc); |
a6c64c3c | 179 | SCM_SETPROCPROPS (proc, new_val); |
0f2d19dd JB |
180 | return SCM_UNSPECIFIED; |
181 | } | |
1bbd0b84 | 182 | #undef FUNC_NAME |
0f2d19dd | 183 | |
3b3b36dd | 184 | SCM_DEFINE (scm_procedure_property, "procedure-property", 2, 0, 0, |
1bbd0b84 | 185 | (SCM p, SCM k), |
b380b885 | 186 | "Return the property of @var{obj} with name @var{key}.") |
1bbd0b84 | 187 | #define FUNC_NAME s_scm_procedure_property |
0f2d19dd JB |
188 | { |
189 | SCM assoc; | |
bc36d050 | 190 | if (scm_is_eq (k, scm_sym_arity)) |
08906709 MD |
191 | { |
192 | SCM arity; | |
7888309b | 193 | SCM_ASSERT (scm_is_true (arity = scm_i_procedure_arity (p)), |
1bbd0b84 | 194 | p, SCM_ARG1, FUNC_NAME); |
08906709 MD |
195 | return arity; |
196 | } | |
34d19ef6 | 197 | SCM_VALIDATE_PROC (1, p); |
67e60655 | 198 | assoc = scm_sloppy_assq (k, |
0c95b57d | 199 | SCM_PROCPROPS (SCM_CLOSUREP (p) |
67e60655 MD |
200 | ? p |
201 | : scm_stand_in_scm_proc (p))); | |
0f2d19dd JB |
202 | return (SCM_NIMP (assoc) ? SCM_CDR (assoc) : SCM_BOOL_F); |
203 | } | |
1bbd0b84 | 204 | #undef FUNC_NAME |
0f2d19dd | 205 | |
3b3b36dd | 206 | SCM_DEFINE (scm_set_procedure_property_x, "set-procedure-property!", 3, 0, 0, |
1bbd0b84 | 207 | (SCM p, SCM k, SCM v), |
b380b885 MD |
208 | "In @var{obj}'s property list, set the property named @var{key} to\n" |
209 | "@var{value}.") | |
1bbd0b84 | 210 | #define FUNC_NAME s_scm_set_procedure_property_x |
0f2d19dd JB |
211 | { |
212 | SCM assoc; | |
0c95b57d | 213 | if (!SCM_CLOSUREP (p)) |
0f2d19dd | 214 | p = scm_stand_in_scm_proc(p); |
34d19ef6 | 215 | SCM_VALIDATE_CLOSURE (1, p); |
bc36d050 | 216 | if (scm_is_eq (k, scm_sym_arity)) |
1bbd0b84 | 217 | SCM_MISC_ERROR ("arity is a read-only property", SCM_EOL); |
0f2d19dd JB |
218 | assoc = scm_sloppy_assq (k, SCM_PROCPROPS (p)); |
219 | if (SCM_NIMP (assoc)) | |
220 | SCM_SETCDR (assoc, v); | |
221 | else | |
a6c64c3c | 222 | SCM_SETPROCPROPS (p, scm_acons (k, v, SCM_PROCPROPS (p))); |
0f2d19dd JB |
223 | return SCM_UNSPECIFIED; |
224 | } | |
1bbd0b84 | 225 | #undef FUNC_NAME |
0f2d19dd JB |
226 | |
227 | \f | |
228 | ||
1cc91f1b | 229 | |
0f2d19dd JB |
230 | void |
231 | scm_init_procprop () | |
0f2d19dd | 232 | { |
a0599745 | 233 | #include "libguile/procprop.x" |
0f2d19dd JB |
234 | } |
235 | ||
89e00824 ML |
236 | |
237 | /* | |
238 | Local Variables: | |
239 | c-file-style: "gnu" | |
240 | End: | |
241 | */ |