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726d810a | 1 | /* Copyright (C) 1995,1996,1998,2000,2001 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program 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 | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 | 41 | |
1bbd0b84 | 42 | |
0f2d19dd JB |
43 | \f |
44 | ||
a0599745 MD |
45 | #include "libguile/_scm.h" |
46 | ||
47 | #include "libguile/alist.h" | |
48 | #include "libguile/eval.h" | |
49 | #include "libguile/procs.h" | |
50 | #include "libguile/gsubr.h" | |
51 | #include "libguile/objects.h" | |
5540e847 | 52 | #include "libguile/smob.h" |
a0599745 MD |
53 | #include "libguile/root.h" |
54 | #include "libguile/vectors.h" | |
55 | ||
56 | #include "libguile/validate.h" | |
57 | #include "libguile/procprop.h" | |
0f2d19dd JB |
58 | \f |
59 | ||
c083a529 | 60 | SCM_GLOBAL_SYMBOL (scm_sym_system_procedure, "system-procedure"); |
67e60655 MD |
61 | SCM_GLOBAL_SYMBOL (scm_sym_arity, "arity"); |
62 | ||
08906709 MD |
63 | SCM |
64 | scm_i_procedure_arity (SCM proc) | |
67e60655 MD |
65 | { |
66 | int a = 0, o = 0, r = 0; | |
08906709 MD |
67 | if (SCM_IMP (proc)) |
68 | return SCM_BOOL_F; | |
67e60655 MD |
69 | loop: |
70 | switch (SCM_TYP7 (proc)) | |
71 | { | |
72 | case scm_tc7_subr_1o: | |
73 | o = 1; | |
74 | case scm_tc7_subr_0: | |
75 | break; | |
76 | case scm_tc7_subr_2o: | |
77 | o = 1; | |
78 | case scm_tc7_subr_1: | |
79 | case scm_tc7_cxr: | |
67e60655 MD |
80 | a += 1; |
81 | break; | |
82 | case scm_tc7_subr_2: | |
83 | a += 2; | |
84 | break; | |
85 | case scm_tc7_subr_3: | |
86 | a += 3; | |
87 | break; | |
88 | case scm_tc7_asubr: | |
89 | case scm_tc7_rpsubr: | |
90 | case scm_tc7_lsubr: | |
91 | r = 1; | |
91517e28 | 92 | break; |
67e60655 MD |
93 | case scm_tc7_lsubr_2: |
94 | a += 2; | |
91517e28 | 95 | r = 1; |
67e60655 | 96 | break; |
5540e847 | 97 | case scm_tc7_smob: |
68b06924 | 98 | if (SCM_SMOB_APPLICABLE_P (proc)) |
362306b9 DH |
99 | { |
100 | int type = SCM_SMOB_DESCRIPTOR (proc).gsubr_type; | |
101 | a += SCM_GSUBR_REQ (type); | |
102 | o = SCM_GSUBR_OPT (type); | |
103 | r = SCM_GSUBR_REST (type); | |
104 | break; | |
105 | } | |
106 | else | |
107 | { | |
5540e847 | 108 | return SCM_BOOL_F; |
362306b9 DH |
109 | } |
110 | case scm_tc7_cclo: | |
111 | if (SCM_EQ_P (SCM_CCLO_SUBR (proc), scm_f_gsubr_apply)) | |
67e60655 | 112 | { |
362306b9 | 113 | int type = SCM_INUM (SCM_GSUBR_TYPE (proc)); |
08906709 | 114 | a += SCM_GSUBR_REQ (type); |
67e60655 MD |
115 | o = SCM_GSUBR_OPT (type); |
116 | r = SCM_GSUBR_REST (type); | |
117 | break; | |
118 | } | |
362306b9 DH |
119 | else |
120 | { | |
121 | proc = SCM_CCLO_SUBR (proc); | |
122 | a -= 1; | |
123 | goto loop; | |
124 | } | |
dec118c8 MD |
125 | case scm_tc7_pws: |
126 | proc = SCM_PROCEDURE (proc); | |
127 | goto loop; | |
67e60655 | 128 | case scm_tcs_closures: |
726d810a DH |
129 | proc = SCM_CLOSURE_FORMALS (proc); |
130 | if (SCM_NULLP (proc)) | |
67e60655 | 131 | break; |
0c95b57d | 132 | while (SCM_CONSP (proc)) |
67e60655 MD |
133 | { |
134 | ++a; | |
135 | proc = SCM_CDR (proc); | |
136 | } | |
726d810a | 137 | if (!SCM_NULLP (proc)) |
67e60655 MD |
138 | r = 1; |
139 | break; | |
904a077d | 140 | case scm_tcs_struct: |
815ce8d5 MD |
141 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
142 | { | |
143 | r = 1; | |
144 | break; | |
145 | } | |
146 | else if (!SCM_I_OPERATORP (proc)) | |
08906709 | 147 | return SCM_BOOL_F; |
815ce8d5 MD |
148 | proc = (SCM_I_ENTITYP (proc) |
149 | ? SCM_ENTITY_PROCEDURE (proc) | |
150 | : SCM_OPERATOR_PROCEDURE (proc)); | |
151 | a -= 1; | |
152 | goto loop; | |
08906709 MD |
153 | default: |
154 | return SCM_BOOL_F; | |
67e60655 | 155 | } |
1afff620 | 156 | return scm_list_3 (SCM_MAKINUM (a), SCM_MAKINUM (o), SCM_BOOL(r)); |
67e60655 MD |
157 | } |
158 | ||
0f2d19dd | 159 | static SCM |
1bbd0b84 | 160 | scm_stand_in_scm_proc(SCM proc) |
0f2d19dd JB |
161 | { |
162 | SCM answer; | |
163 | answer = scm_assoc (proc, scm_stand_in_procs); | |
54778cd3 | 164 | if (SCM_FALSEP (answer)) |
0f2d19dd | 165 | { |
1afff620 | 166 | answer = scm_closure (scm_list_2 (SCM_EOL, SCM_BOOL_F), SCM_EOL); |
e0c08f17 | 167 | scm_stand_in_procs = scm_acons (proc, answer, scm_stand_in_procs); |
0f2d19dd JB |
168 | } |
169 | else | |
170 | answer = SCM_CDR (answer); | |
171 | return answer; | |
172 | } | |
173 | ||
3b3b36dd | 174 | SCM_DEFINE (scm_procedure_properties, "procedure-properties", 1, 0, 0, |
1bbd0b84 | 175 | (SCM proc), |
b380b885 | 176 | "Return @var{obj}'s property list.") |
1bbd0b84 | 177 | #define FUNC_NAME s_scm_procedure_properties |
0f2d19dd | 178 | { |
3b3b36dd | 179 | SCM_VALIDATE_PROC (1,proc); |
67e60655 | 180 | return scm_acons (scm_sym_arity, scm_i_procedure_arity (proc), |
0c95b57d | 181 | SCM_PROCPROPS (SCM_CLOSUREP (proc) |
67e60655 MD |
182 | ? proc |
183 | : scm_stand_in_scm_proc (proc))); | |
0f2d19dd | 184 | } |
1bbd0b84 | 185 | #undef FUNC_NAME |
0f2d19dd | 186 | |
3b3b36dd | 187 | SCM_DEFINE (scm_set_procedure_properties_x, "set-procedure-properties!", 2, 0, 0, |
1bbd0b84 | 188 | (SCM proc, SCM new_val), |
b380b885 | 189 | "Set @var{obj}'s property list to @var{alist}.") |
1bbd0b84 | 190 | #define FUNC_NAME s_scm_set_procedure_properties_x |
0f2d19dd | 191 | { |
0c95b57d | 192 | if (!SCM_CLOSUREP (proc)) |
0f2d19dd | 193 | proc = scm_stand_in_scm_proc(proc); |
3b3b36dd | 194 | SCM_VALIDATE_CLOSURE (1,proc); |
a6c64c3c | 195 | SCM_SETPROCPROPS (proc, new_val); |
0f2d19dd JB |
196 | return SCM_UNSPECIFIED; |
197 | } | |
1bbd0b84 | 198 | #undef FUNC_NAME |
0f2d19dd | 199 | |
3b3b36dd | 200 | SCM_DEFINE (scm_procedure_property, "procedure-property", 2, 0, 0, |
1bbd0b84 | 201 | (SCM p, SCM k), |
b380b885 | 202 | "Return the property of @var{obj} with name @var{key}.") |
1bbd0b84 | 203 | #define FUNC_NAME s_scm_procedure_property |
0f2d19dd JB |
204 | { |
205 | SCM assoc; | |
54778cd3 | 206 | if (SCM_EQ_P (k, scm_sym_arity)) |
08906709 MD |
207 | { |
208 | SCM arity; | |
209 | SCM_ASSERT (SCM_NFALSEP (arity = scm_i_procedure_arity (p)), | |
1bbd0b84 | 210 | p, SCM_ARG1, FUNC_NAME); |
08906709 MD |
211 | return arity; |
212 | } | |
3b3b36dd | 213 | SCM_VALIDATE_PROC (1,p); |
67e60655 | 214 | assoc = scm_sloppy_assq (k, |
0c95b57d | 215 | SCM_PROCPROPS (SCM_CLOSUREP (p) |
67e60655 MD |
216 | ? p |
217 | : scm_stand_in_scm_proc (p))); | |
0f2d19dd JB |
218 | return (SCM_NIMP (assoc) ? SCM_CDR (assoc) : SCM_BOOL_F); |
219 | } | |
1bbd0b84 | 220 | #undef FUNC_NAME |
0f2d19dd | 221 | |
3b3b36dd | 222 | SCM_DEFINE (scm_set_procedure_property_x, "set-procedure-property!", 3, 0, 0, |
1bbd0b84 | 223 | (SCM p, SCM k, SCM v), |
b380b885 MD |
224 | "In @var{obj}'s property list, set the property named @var{key} to\n" |
225 | "@var{value}.") | |
1bbd0b84 | 226 | #define FUNC_NAME s_scm_set_procedure_property_x |
0f2d19dd JB |
227 | { |
228 | SCM assoc; | |
0c95b57d | 229 | if (!SCM_CLOSUREP (p)) |
0f2d19dd | 230 | p = scm_stand_in_scm_proc(p); |
3b3b36dd | 231 | SCM_VALIDATE_CLOSURE (1,p); |
54778cd3 | 232 | if (SCM_EQ_P (k, scm_sym_arity)) |
1bbd0b84 | 233 | SCM_MISC_ERROR ("arity is a read-only property", SCM_EOL); |
0f2d19dd JB |
234 | assoc = scm_sloppy_assq (k, SCM_PROCPROPS (p)); |
235 | if (SCM_NIMP (assoc)) | |
236 | SCM_SETCDR (assoc, v); | |
237 | else | |
a6c64c3c | 238 | SCM_SETPROCPROPS (p, scm_acons (k, v, SCM_PROCPROPS (p))); |
0f2d19dd JB |
239 | return SCM_UNSPECIFIED; |
240 | } | |
1bbd0b84 | 241 | #undef FUNC_NAME |
0f2d19dd JB |
242 | |
243 | \f | |
244 | ||
1cc91f1b | 245 | |
0f2d19dd JB |
246 | void |
247 | scm_init_procprop () | |
0f2d19dd | 248 | { |
8dc9439f | 249 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 250 | #include "libguile/procprop.x" |
8dc9439f | 251 | #endif |
0f2d19dd JB |
252 | } |
253 | ||
89e00824 ML |
254 | |
255 | /* | |
256 | Local Variables: | |
257 | c-file-style: "gnu" | |
258 | End: | |
259 | */ |