Commit | Line | Data |
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c438cd71 | 1 | /* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
aac01de6 | 2 | * 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 |
c438cd71 LC |
3 | * Free Software Foundation, Inc. |
4 | * | |
b7742c6b AW |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public License | |
7 | * as published by the Free Software Foundation; either version 3 of | |
8 | * the License, or (at your option) any later version. | |
9 | * | |
10 | * This library is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * Lesser General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU Lesser General Public | |
16 | * License along with this library; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
18 | * 02110-1301 USA | |
19 | */ | |
20 | ||
21 | \f | |
22 | ||
23 | #ifdef HAVE_CONFIG_H | |
24 | # include <config.h> | |
25 | #endif | |
26 | ||
b7742c6b | 27 | #include "libguile/__scm.h" |
b7742c6b AW |
28 | #include "libguile/_scm.h" |
29 | #include "libguile/continuations.h" | |
30 | #include "libguile/eq.h" | |
dc3e203e | 31 | #include "libguile/expand.h" |
b7742c6b AW |
32 | #include "libguile/list.h" |
33 | #include "libguile/macros.h" | |
34 | #include "libguile/memoize.h" | |
35 | #include "libguile/modules.h" | |
36 | #include "libguile/srcprop.h" | |
37 | #include "libguile/ports.h" | |
38 | #include "libguile/print.h" | |
39 | #include "libguile/strings.h" | |
40 | #include "libguile/throw.h" | |
41 | #include "libguile/validate.h" | |
42 | ||
43 | ||
44 | \f | |
45 | ||
46 | ||
b7742c6b AW |
47 | #define CAR(x) SCM_CAR(x) |
48 | #define CDR(x) SCM_CDR(x) | |
49 | #define CAAR(x) SCM_CAAR(x) | |
50 | #define CADR(x) SCM_CADR(x) | |
51 | #define CDAR(x) SCM_CDAR(x) | |
52 | #define CDDR(x) SCM_CDDR(x) | |
53 | #define CADDR(x) SCM_CADDR(x) | |
54 | #define CDDDR(x) SCM_CDDDR(x) | |
b7ecadca | 55 | #define CADDDR(x) SCM_CADDDR(x) |
b7742c6b | 56 | |
cfc28c80 AW |
57 | #define VECTOR_REF(v, i) (SCM_SIMPLE_VECTOR_REF (v, i)) |
58 | #define VECTOR_SET(v, i, x) (SCM_SIMPLE_VECTOR_SET (v, i, x)) | |
59 | #define VECTOR_LENGTH(v) (SCM_SIMPLE_VECTOR_LENGTH (v)) | |
b7742c6b | 60 | |
dc3e203e | 61 | SCM_SYMBOL (sym_case_lambda_star, "case-lambda*"); |
b7742c6b AW |
62 | |
63 | \f | |
64 | ||
65 | ||
bb97e4ab AW |
66 | /* Primitives not exposed to general Scheme. */ |
67 | static SCM wind; | |
68 | static SCM unwind; | |
c32b7c4c AW |
69 | static SCM push_fluid; |
70 | static SCM pop_fluid; | |
bb97e4ab AW |
71 | |
72 | static SCM | |
73 | do_wind (SCM in, SCM out) | |
74 | { | |
75 | scm_dynstack_push_dynwind (&SCM_I_CURRENT_THREAD->dynstack, in, out); | |
76 | return SCM_UNSPECIFIED; | |
77 | } | |
78 | ||
79 | static SCM | |
80 | do_unwind (void) | |
81 | { | |
82 | scm_dynstack_pop (&SCM_I_CURRENT_THREAD->dynstack); | |
83 | return SCM_UNSPECIFIED; | |
84 | } | |
85 | ||
c32b7c4c AW |
86 | static SCM |
87 | do_push_fluid (SCM fluid, SCM val) | |
88 | { | |
89 | scm_i_thread *thread = SCM_I_CURRENT_THREAD; | |
98eaef1b AW |
90 | scm_dynstack_push_fluid (&thread->dynstack, fluid, val, |
91 | thread->dynamic_state); | |
c32b7c4c AW |
92 | return SCM_UNSPECIFIED; |
93 | } | |
94 | ||
95 | static SCM | |
96 | do_pop_fluid (void) | |
97 | { | |
98 | scm_i_thread *thread = SCM_I_CURRENT_THREAD; | |
98eaef1b | 99 | scm_dynstack_unwind_fluid (&thread->dynstack, thread->dynamic_state); |
c32b7c4c AW |
100 | return SCM_UNSPECIFIED; |
101 | } | |
102 | ||
bb97e4ab AW |
103 | |
104 | \f | |
105 | ||
b7742c6b AW |
106 | /* {Evaluator memoized expressions} |
107 | */ | |
108 | ||
109 | scm_t_bits scm_tc16_memoized; | |
110 | ||
b2b33168 | 111 | #define MAKMEMO(n, args) \ |
0720f70e | 112 | (scm_cons (SCM_I_MAKINUM (n), args)) |
b7742c6b | 113 | |
6fc3eae4 AW |
114 | #define MAKMEMO_SEQ(head,tail) \ |
115 | MAKMEMO (SCM_M_SEQ, scm_cons (head, tail)) | |
b7742c6b AW |
116 | #define MAKMEMO_IF(test, then, else_) \ |
117 | MAKMEMO (SCM_M_IF, scm_cons (test, scm_cons (then, else_))) | |
8f9c5b58 AW |
118 | #define FIXED_ARITY(nreq) \ |
119 | scm_list_1 (SCM_I_MAKINUM (nreq)) | |
120 | #define REST_ARITY(nreq, rest) \ | |
121 | scm_list_2 (SCM_I_MAKINUM (nreq), rest) | |
9658182d AW |
122 | #define FULL_ARITY(nreq, rest, nopt, kw, inits, alt) \ |
123 | scm_list_n (SCM_I_MAKINUM (nreq), rest, SCM_I_MAKINUM (nopt), kw, inits, \ | |
124 | alt, SCM_UNDEFINED) | |
27ecfd36 | 125 | #define MAKMEMO_LAMBDA(body, arity, meta) \ |
c438cd71 | 126 | MAKMEMO (SCM_M_LAMBDA, \ |
27ecfd36 | 127 | scm_cons (body, scm_cons (meta, arity))) |
b7742c6b AW |
128 | #define MAKMEMO_LET(inits, body) \ |
129 | MAKMEMO (SCM_M_LET, scm_cons (inits, body)) | |
130 | #define MAKMEMO_QUOTE(exp) \ | |
131 | MAKMEMO (SCM_M_QUOTE, exp) | |
132 | #define MAKMEMO_DEFINE(var, val) \ | |
133 | MAKMEMO (SCM_M_DEFINE, scm_cons (var, val)) | |
2cd72a84 AW |
134 | #define MAKMEMO_APPLY(proc, args)\ |
135 | MAKMEMO (SCM_M_APPLY, scm_list_2 (proc, args)) | |
b7742c6b AW |
136 | #define MAKMEMO_CONT(proc) \ |
137 | MAKMEMO (SCM_M_CONT, proc) | |
138 | #define MAKMEMO_CALL_WITH_VALUES(prod, cons) \ | |
139 | MAKMEMO (SCM_M_CALL_WITH_VALUES, scm_cons (prod, cons)) | |
9331f91c AW |
140 | #define MAKMEMO_CALL(proc, nargs, args) \ |
141 | MAKMEMO (SCM_M_CALL, scm_cons (proc, scm_cons (SCM_I_MAKINUM (nargs), args))) | |
cfc28c80 AW |
142 | #define MAKMEMO_LEX_REF(pos) \ |
143 | MAKMEMO (SCM_M_LEXICAL_REF, pos) | |
144 | #define MAKMEMO_LEX_SET(pos, val) \ | |
145 | MAKMEMO (SCM_M_LEXICAL_SET, scm_cons (pos, val)) | |
b7742c6b AW |
146 | #define MAKMEMO_TOP_REF(var) \ |
147 | MAKMEMO (SCM_M_TOPLEVEL_REF, var) | |
148 | #define MAKMEMO_TOP_SET(var, val) \ | |
149 | MAKMEMO (SCM_M_TOPLEVEL_SET, scm_cons (var, val)) | |
150 | #define MAKMEMO_MOD_REF(mod, var, public) \ | |
151 | MAKMEMO (SCM_M_MODULE_REF, scm_cons (mod, scm_cons (var, public))) | |
152 | #define MAKMEMO_MOD_SET(val, mod, var, public) \ | |
153 | MAKMEMO (SCM_M_MODULE_SET, scm_cons (val, scm_cons (mod, scm_cons (var, public)))) | |
1773bc7d AW |
154 | #define MAKMEMO_CALL_WITH_PROMPT(tag, thunk, handler) \ |
155 | MAKMEMO (SCM_M_CALL_WITH_PROMPT, scm_cons (tag, scm_cons (thunk, handler))) | |
b7742c6b | 156 | |
2cd72a84 | 157 | |
b7742c6b AW |
158 | \f |
159 | ||
160 | /* This table must agree with the list of M_ constants in memoize.h */ | |
161 | static const char *const memoized_tags[] = | |
162 | { | |
6fc3eae4 | 163 | "seq", |
b7742c6b AW |
164 | "if", |
165 | "lambda", | |
166 | "let", | |
167 | "quote", | |
168 | "define", | |
169 | "apply", | |
3149a5b6 | 170 | "call/cc", |
b7742c6b AW |
171 | "call-with-values", |
172 | "call", | |
173 | "lexical-ref", | |
174 | "lexical-set!", | |
175 | "toplevel-ref", | |
176 | "toplevel-set!", | |
177 | "module-ref", | |
3149a5b6 | 178 | "module-set!", |
1773bc7d | 179 | "call-with-prompt", |
b7742c6b AW |
180 | }; |
181 | ||
b7742c6b | 182 | |
b7742c6b AW |
183 | \f |
184 | ||
185 | ||
b7742c6b | 186 | static int |
cfc28c80 AW |
187 | try_lookup_rib (SCM x, SCM rib) |
188 | { | |
189 | int idx = 0; | |
190 | for (; idx < VECTOR_LENGTH (rib); idx++) | |
191 | if (scm_is_eq (x, VECTOR_REF (rib, idx))) | |
192 | return idx; /* bound */ | |
193 | return -1; | |
194 | } | |
195 | ||
196 | static int | |
197 | lookup_rib (SCM x, SCM rib) | |
198 | { | |
199 | int idx = try_lookup_rib (x, rib); | |
200 | if (idx < 0) | |
201 | abort (); | |
202 | return idx; | |
203 | } | |
204 | ||
205 | static SCM | |
206 | make_pos (int depth, int width) | |
207 | { | |
208 | return scm_cons (SCM_I_MAKINUM (depth), SCM_I_MAKINUM (width)); | |
209 | } | |
210 | ||
211 | static SCM | |
dc3e203e | 212 | lookup (SCM x, SCM env) |
b7742c6b | 213 | { |
cfc28c80 AW |
214 | int d = 0; |
215 | for (; scm_is_pair (env); env = CDR (env), d++) | |
216 | { | |
217 | int w = try_lookup_rib (x, CAR (env)); | |
218 | if (w < 0) | |
219 | continue; | |
220 | return make_pos (d, w); | |
221 | } | |
dc3e203e | 222 | abort (); |
b7742c6b AW |
223 | } |
224 | ||
dc3e203e AW |
225 | /* Abbreviate SCM_EXPANDED_REF. Copied because I'm not sure about symbol pasting */ |
226 | #define REF(x,type,field) \ | |
227 | (scm_struct_ref (x, SCM_I_MAKINUM (SCM_EXPANDED_##type##_##field))) | |
b7742c6b | 228 | |
dc3e203e | 229 | static SCM list_of_guile = SCM_BOOL_F; |
b7742c6b | 230 | |
dc3e203e | 231 | static SCM memoize (SCM exp, SCM env); |
b7742c6b AW |
232 | |
233 | static SCM | |
dc3e203e | 234 | memoize_exps (SCM exps, SCM env) |
b7742c6b | 235 | { |
dc3e203e AW |
236 | SCM ret; |
237 | for (ret = SCM_EOL; scm_is_pair (exps); exps = CDR (exps)) | |
238 | ret = scm_cons (memoize (CAR (exps), env), ret); | |
239 | return scm_reverse_x (ret, SCM_UNDEFINED); | |
7572ee52 | 240 | } |
7572ee52 | 241 | |
7572ee52 | 242 | static SCM |
dc3e203e | 243 | memoize (SCM exp, SCM env) |
b7742c6b | 244 | { |
dc3e203e AW |
245 | if (!SCM_EXPANDED_P (exp)) |
246 | abort (); | |
b7742c6b | 247 | |
dc3e203e | 248 | switch (SCM_EXPANDED_TYPE (exp)) |
b7742c6b | 249 | { |
dc3e203e AW |
250 | case SCM_EXPANDED_VOID: |
251 | return MAKMEMO_QUOTE (SCM_UNSPECIFIED); | |
252 | ||
253 | case SCM_EXPANDED_CONST: | |
254 | return MAKMEMO_QUOTE (REF (exp, CONST, EXP)); | |
b7742c6b | 255 | |
dc3e203e AW |
256 | case SCM_EXPANDED_PRIMITIVE_REF: |
257 | if (scm_is_eq (scm_current_module (), scm_the_root_module ())) | |
258 | return MAKMEMO_TOP_REF (REF (exp, PRIMITIVE_REF, NAME)); | |
259 | else | |
260 | return MAKMEMO_MOD_REF (list_of_guile, REF (exp, PRIMITIVE_REF, NAME), | |
261 | SCM_BOOL_F); | |
262 | ||
263 | case SCM_EXPANDED_LEXICAL_REF: | |
264 | return MAKMEMO_LEX_REF (lookup (REF (exp, LEXICAL_REF, GENSYM), env)); | |
265 | ||
266 | case SCM_EXPANDED_LEXICAL_SET: | |
267 | return MAKMEMO_LEX_SET (lookup (REF (exp, LEXICAL_SET, GENSYM), env), | |
268 | memoize (REF (exp, LEXICAL_SET, EXP), env)); | |
269 | ||
270 | case SCM_EXPANDED_MODULE_REF: | |
271 | return MAKMEMO_MOD_REF (REF (exp, MODULE_REF, MOD), | |
272 | REF (exp, MODULE_REF, NAME), | |
273 | REF (exp, MODULE_REF, PUBLIC)); | |
274 | ||
275 | case SCM_EXPANDED_MODULE_SET: | |
276 | return MAKMEMO_MOD_SET (memoize (REF (exp, MODULE_SET, EXP), env), | |
277 | REF (exp, MODULE_SET, MOD), | |
278 | REF (exp, MODULE_SET, NAME), | |
279 | REF (exp, MODULE_SET, PUBLIC)); | |
280 | ||
281 | case SCM_EXPANDED_TOPLEVEL_REF: | |
282 | return MAKMEMO_TOP_REF (REF (exp, TOPLEVEL_REF, NAME)); | |
283 | ||
284 | case SCM_EXPANDED_TOPLEVEL_SET: | |
285 | return MAKMEMO_TOP_SET (REF (exp, TOPLEVEL_SET, NAME), | |
286 | memoize (REF (exp, TOPLEVEL_SET, EXP), env)); | |
287 | ||
288 | case SCM_EXPANDED_TOPLEVEL_DEFINE: | |
289 | return MAKMEMO_DEFINE (REF (exp, TOPLEVEL_DEFINE, NAME), | |
290 | memoize (REF (exp, TOPLEVEL_DEFINE, EXP), env)); | |
291 | ||
292 | case SCM_EXPANDED_CONDITIONAL: | |
293 | return MAKMEMO_IF (memoize (REF (exp, CONDITIONAL, TEST), env), | |
294 | memoize (REF (exp, CONDITIONAL, CONSEQUENT), env), | |
295 | memoize (REF (exp, CONDITIONAL, ALTERNATE), env)); | |
296 | ||
7081d4f9 | 297 | case SCM_EXPANDED_CALL: |
dc3e203e AW |
298 | { |
299 | SCM proc, args; | |
b7742c6b | 300 | |
7081d4f9 AW |
301 | proc = REF (exp, CALL, PROC); |
302 | args = memoize_exps (REF (exp, CALL, ARGS), env); | |
b7742c6b | 303 | |
dc3e203e AW |
304 | return MAKMEMO_CALL (memoize (proc, env), scm_ilength (args), args); |
305 | } | |
b7742c6b | 306 | |
a881a4ae AW |
307 | case SCM_EXPANDED_PRIMCALL: |
308 | { | |
1773bc7d AW |
309 | SCM name, args; |
310 | int nargs; | |
a881a4ae | 311 | |
1773bc7d | 312 | name = REF (exp, PRIMCALL, NAME); |
a881a4ae | 313 | args = memoize_exps (REF (exp, PRIMCALL, ARGS), env); |
1773bc7d AW |
314 | nargs = scm_ilength (args); |
315 | ||
316 | if (nargs == 3 | |
317 | && scm_is_eq (name, scm_from_latin1_symbol ("call-with-prompt"))) | |
318 | return MAKMEMO_CALL_WITH_PROMPT (CAR (args), | |
319 | CADR (args), | |
320 | CADDR (args)); | |
39caffe7 AW |
321 | else if (nargs == 2 |
322 | && scm_is_eq (name, scm_from_latin1_symbol ("apply"))) | |
323 | return MAKMEMO_APPLY (CAR (args), CADR (args)); | |
bc056057 AW |
324 | else if (nargs == 1 |
325 | && scm_is_eq (name, | |
326 | scm_from_latin1_symbol | |
327 | ("call-with-current-continuation"))) | |
328 | return MAKMEMO_CONT (CAR (args)); | |
0fcc39a0 AW |
329 | else if (nargs == 2 |
330 | && scm_is_eq (name, | |
331 | scm_from_latin1_symbol ("call-with-values"))) | |
332 | return MAKMEMO_CALL_WITH_VALUES (CAR (args), CADR (args)); | |
bb97e4ab AW |
333 | else if (nargs == 2 |
334 | && scm_is_eq (name, scm_from_latin1_symbol ("wind"))) | |
335 | return MAKMEMO_CALL (MAKMEMO_QUOTE (wind), 2, args); | |
336 | else if (nargs == 0 | |
337 | && scm_is_eq (name, scm_from_latin1_symbol ("unwind"))) | |
338 | return MAKMEMO_CALL (MAKMEMO_QUOTE (unwind), 0, SCM_EOL); | |
c32b7c4c AW |
339 | else if (nargs == 2 |
340 | && scm_is_eq (name, scm_from_latin1_symbol ("push-fluid"))) | |
341 | return MAKMEMO_CALL (MAKMEMO_QUOTE (push_fluid), 2, args); | |
342 | else if (nargs == 0 | |
343 | && scm_is_eq (name, scm_from_latin1_symbol ("pop-fluid"))) | |
344 | return MAKMEMO_CALL (MAKMEMO_QUOTE (pop_fluid), 0, SCM_EOL); | |
1773bc7d AW |
345 | else if (scm_is_eq (scm_current_module (), scm_the_root_module ())) |
346 | return MAKMEMO_CALL (MAKMEMO_TOP_REF (name), nargs, args); | |
347 | else | |
348 | return MAKMEMO_CALL (MAKMEMO_MOD_REF (list_of_guile, name, | |
349 | SCM_BOOL_F), | |
350 | nargs, | |
351 | args); | |
a881a4ae AW |
352 | } |
353 | ||
6fc3eae4 AW |
354 | case SCM_EXPANDED_SEQ: |
355 | return MAKMEMO_SEQ (memoize (REF (exp, SEQ, HEAD), env), | |
356 | memoize (REF (exp, SEQ, TAIL), env)); | |
b7742c6b | 357 | |
dc3e203e | 358 | case SCM_EXPANDED_LAMBDA: |
19113f1c | 359 | /* The body will be a lambda-case or #f. */ |
c438cd71 | 360 | { |
27ecfd36 | 361 | SCM meta, body, proc; |
c438cd71 LC |
362 | |
363 | meta = REF (exp, LAMBDA, META); | |
c438cd71 | 364 | |
19113f1c AW |
365 | body = REF (exp, LAMBDA, BODY); |
366 | if (scm_is_false (body)) | |
367 | /* Give a body to case-lambda with no clauses. */ | |
368 | proc = MAKMEMO_LAMBDA | |
369 | (MAKMEMO_CALL | |
370 | (MAKMEMO_MOD_REF (list_of_guile, | |
371 | scm_from_latin1_symbol ("throw"), | |
372 | SCM_BOOL_F), | |
373 | 5, | |
374 | scm_list_5 (MAKMEMO_QUOTE (scm_args_number_key), | |
375 | MAKMEMO_QUOTE (SCM_BOOL_F), | |
376 | MAKMEMO_QUOTE (scm_from_latin1_string | |
377 | ("Wrong number of arguments")), | |
378 | MAKMEMO_QUOTE (SCM_EOL), | |
379 | MAKMEMO_QUOTE (SCM_BOOL_F))), | |
380 | FIXED_ARITY (0), | |
27ecfd36 | 381 | meta); |
19113f1c | 382 | else |
27ecfd36 AW |
383 | { |
384 | proc = memoize (body, env); | |
385 | SCM_SETCAR (SCM_CDR (SCM_MEMOIZED_ARGS (proc)), meta); | |
386 | } | |
c438cd71 LC |
387 | |
388 | return proc; | |
389 | } | |
b7742c6b | 390 | |
dc3e203e AW |
391 | case SCM_EXPANDED_LAMBDA_CASE: |
392 | { | |
393 | SCM req, rest, opt, kw, inits, vars, body, alt; | |
cfc28c80 AW |
394 | SCM walk, minits, arity, rib, new_env; |
395 | int nreq, nopt; | |
dc3e203e AW |
396 | |
397 | req = REF (exp, LAMBDA_CASE, REQ); | |
d61d6686 | 398 | rest = scm_not (scm_not (REF (exp, LAMBDA_CASE, REST))); |
dc3e203e AW |
399 | opt = REF (exp, LAMBDA_CASE, OPT); |
400 | kw = REF (exp, LAMBDA_CASE, KW); | |
401 | inits = REF (exp, LAMBDA_CASE, INITS); | |
402 | vars = REF (exp, LAMBDA_CASE, GENSYMS); | |
403 | body = REF (exp, LAMBDA_CASE, BODY); | |
404 | alt = REF (exp, LAMBDA_CASE, ALTERNATE); | |
405 | ||
406 | nreq = scm_ilength (req); | |
407 | nopt = scm_is_pair (opt) ? scm_ilength (opt) : 0; | |
408 | ||
409 | /* The vars are the gensyms, according to the divine plan. But we need | |
410 | to memoize the inits within their appropriate environment, | |
411 | complicating things. */ | |
cfc28c80 AW |
412 | rib = scm_vector (vars); |
413 | new_env = scm_cons (rib, env); | |
dc3e203e AW |
414 | |
415 | minits = SCM_EOL; | |
cfc28c80 AW |
416 | for (walk = inits; scm_is_pair (walk); walk = CDR (walk)) |
417 | minits = scm_cons (memoize (CAR (walk), new_env), minits); | |
dc3e203e | 418 | minits = scm_reverse_x (minits, SCM_UNDEFINED); |
b7742c6b | 419 | |
632ddbf0 AW |
420 | if (scm_is_true (kw)) |
421 | { | |
422 | /* (aok? (kw name sym) ...) -> (aok? (kw . index) ...) */ | |
423 | SCM aok = CAR (kw), indices = SCM_EOL; | |
424 | for (kw = CDR (kw); scm_is_pair (kw); kw = CDR (kw)) | |
425 | { | |
426 | SCM k; | |
427 | int idx; | |
428 | ||
429 | k = CAR (CAR (kw)); | |
cfc28c80 | 430 | idx = lookup_rib (CADDR (CAR (kw)), rib); |
632ddbf0 AW |
431 | indices = scm_acons (k, SCM_I_MAKINUM (idx), indices); |
432 | } | |
433 | kw = scm_cons (aok, scm_reverse_x (indices, SCM_UNDEFINED)); | |
434 | } | |
435 | ||
dc3e203e AW |
436 | if (scm_is_false (alt) && scm_is_false (kw) && scm_is_false (opt)) |
437 | { | |
438 | if (scm_is_false (rest)) | |
439 | arity = FIXED_ARITY (nreq); | |
440 | else | |
441 | arity = REST_ARITY (nreq, SCM_BOOL_T); | |
442 | } | |
443 | else if (scm_is_true (alt)) | |
444 | arity = FULL_ARITY (nreq, rest, nopt, kw, minits, | |
445 | SCM_MEMOIZED_ARGS (memoize (alt, env))); | |
446 | else | |
447 | arity = FULL_ARITY (nreq, rest, nopt, kw, minits, SCM_BOOL_F); | |
b7742c6b | 448 | |
c438cd71 | 449 | return MAKMEMO_LAMBDA (memoize (body, new_env), arity, |
27ecfd36 | 450 | SCM_BOOL_F /* meta, filled in later */); |
dc3e203e | 451 | } |
b7742c6b | 452 | |
dc3e203e AW |
453 | case SCM_EXPANDED_LET: |
454 | { | |
cfc28c80 AW |
455 | SCM vars, exps, body, varsv, inits, new_env; |
456 | int i; | |
dc3e203e AW |
457 | |
458 | vars = REF (exp, LET, GENSYMS); | |
459 | exps = REF (exp, LET, VALS); | |
460 | body = REF (exp, LET, BODY); | |
461 | ||
cfc28c80 AW |
462 | varsv = scm_vector (vars); |
463 | inits = scm_c_make_vector (VECTOR_LENGTH (varsv), | |
464 | SCM_BOOL_F); | |
465 | new_env = scm_cons (varsv, env); | |
466 | for (i = 0; scm_is_pair (exps); exps = CDR (exps), i++) | |
467 | VECTOR_SET (inits, i, memoize (CAR (exps), env)); | |
468 | ||
469 | return MAKMEMO_LET (inits, memoize (body, new_env)); | |
dc3e203e | 470 | } |
b7742c6b | 471 | |
dc3e203e AW |
472 | case SCM_EXPANDED_LETREC: |
473 | { | |
cfc28c80 | 474 | SCM vars, varsv, exps, expsv, body, undefs, new_env; |
826373a2 | 475 | int i, nvars, in_order_p; |
dc3e203e | 476 | |
f238862e AW |
477 | vars = REF (exp, LETREC, GENSYMS); |
478 | exps = REF (exp, LETREC, VALS); | |
479 | body = REF (exp, LETREC, BODY); | |
826373a2 | 480 | in_order_p = scm_is_true (REF (exp, LETREC, IN_ORDER_P)); |
dc3e203e | 481 | |
cfc28c80 AW |
482 | varsv = scm_vector (vars); |
483 | nvars = VECTOR_LENGTH (varsv); | |
484 | expsv = scm_vector (exps); | |
485 | ||
486 | undefs = scm_c_make_vector (nvars, MAKMEMO_QUOTE (SCM_UNDEFINED)); | |
487 | new_env = scm_cons (varsv, env); | |
b7742c6b | 488 | |
826373a2 AW |
489 | if (in_order_p) |
490 | { | |
cfc28c80 AW |
491 | SCM body_exps = memoize (body, new_env); |
492 | for (i = nvars - 1; i >= 0; i--) | |
493 | { | |
494 | SCM init = memoize (VECTOR_REF (expsv, i), new_env); | |
495 | body_exps = MAKMEMO_SEQ (MAKMEMO_LEX_SET (make_pos (0, i), init), | |
496 | body_exps); | |
497 | } | |
498 | return MAKMEMO_LET (undefs, body_exps); | |
826373a2 AW |
499 | } |
500 | else | |
501 | { | |
cfc28c80 AW |
502 | SCM sets = SCM_BOOL_F, inits = scm_c_make_vector (nvars, SCM_BOOL_F); |
503 | for (i = nvars - 1; i >= 0; i--) | |
826373a2 | 504 | { |
cfc28c80 AW |
505 | SCM init, set; |
506 | ||
507 | init = memoize (VECTOR_REF (expsv, i), new_env); | |
508 | VECTOR_SET (inits, i, init); | |
509 | ||
510 | set = MAKMEMO_LEX_SET (make_pos (1, i), | |
511 | MAKMEMO_LEX_REF (make_pos (0, i))); | |
512 | if (scm_is_false (sets)) | |
513 | sets = set; | |
514 | else | |
515 | sets = MAKMEMO_SEQ (set, sets); | |
826373a2 | 516 | } |
6fc3eae4 | 517 | |
cfc28c80 | 518 | if (scm_is_false (sets)) |
6fc3eae4 AW |
519 | return memoize (body, env); |
520 | ||
6fc3eae4 | 521 | return MAKMEMO_LET (undefs, |
cfc28c80 | 522 | MAKMEMO_SEQ (MAKMEMO_LET (inits, sets), |
6fc3eae4 | 523 | memoize (body, new_env))); |
826373a2 | 524 | } |
dc3e203e | 525 | } |
b7742c6b | 526 | |
b7742c6b | 527 | default: |
dc3e203e | 528 | abort (); |
b7742c6b AW |
529 | } |
530 | } | |
531 | ||
532 | ||
533 | \f | |
534 | ||
535 | SCM_DEFINE (scm_memoize_expression, "memoize-expression", 1, 0, 0, | |
536 | (SCM exp), | |
537 | "Memoize the expression @var{exp}.") | |
538 | #define FUNC_NAME s_scm_memoize_expression | |
539 | { | |
a310a1d1 | 540 | SCM_ASSERT_TYPE (SCM_EXPANDED_P (exp), exp, 1, FUNC_NAME, "expanded"); |
b7742c6b AW |
541 | return memoize (exp, scm_current_module ()); |
542 | } | |
543 | #undef FUNC_NAME | |
544 | ||
2cd72a84 | 545 | |
b7742c6b AW |
546 | \f |
547 | ||
b7742c6b AW |
548 | SCM_SYMBOL (sym_placeholder, "_"); |
549 | ||
550 | static SCM unmemoize (SCM expr); | |
551 | ||
552 | static SCM | |
553 | unmemoize_exprs (SCM exprs) | |
554 | { | |
555 | SCM ret, tail; | |
556 | if (scm_is_null (exprs)) | |
557 | return SCM_EOL; | |
558 | ret = scm_list_1 (unmemoize (CAR (exprs))); | |
559 | tail = ret; | |
560 | for (exprs = CDR (exprs); !scm_is_null (exprs); exprs = CDR (exprs)) | |
561 | { | |
562 | SCM_SETCDR (tail, scm_list_1 (unmemoize (CAR (exprs)))); | |
563 | tail = CDR (tail); | |
564 | } | |
565 | return ret; | |
566 | } | |
567 | ||
568 | static SCM | |
569 | unmemoize_bindings (SCM inits) | |
570 | { | |
cfc28c80 AW |
571 | SCM ret = SCM_EOL; |
572 | int n = scm_c_vector_length (inits); | |
573 | ||
574 | while (n--) | |
575 | ret = scm_cons (unmemoize (scm_c_vector_ref (inits, n)), ret); | |
576 | ||
b7742c6b AW |
577 | return ret; |
578 | } | |
579 | ||
580 | static SCM | |
581 | unmemoize_lexical (SCM n) | |
582 | { | |
cfc28c80 AW |
583 | char buf[32]; |
584 | buf[31] = 0; | |
585 | snprintf (buf, 31, "<%u,%u>", scm_to_uint32 (CAR (n)), | |
586 | scm_to_uint32 (CDR (n))); | |
25d50a05 | 587 | return scm_from_utf8_symbol (buf); |
b7742c6b AW |
588 | } |
589 | ||
590 | static SCM | |
591 | unmemoize (const SCM expr) | |
592 | { | |
593 | SCM args; | |
594 | ||
b7742c6b AW |
595 | args = SCM_MEMOIZED_ARGS (expr); |
596 | switch (SCM_MEMOIZED_TAG (expr)) | |
597 | { | |
598 | case SCM_M_APPLY: | |
39caffe7 AW |
599 | return scm_cons (scm_from_latin1_symbol ("apply"), |
600 | unmemoize_exprs (args)); | |
6fc3eae4 AW |
601 | case SCM_M_SEQ: |
602 | return scm_list_3 (scm_sym_begin, unmemoize (CAR (args)), | |
603 | unmemoize (CDR (args))); | |
b7742c6b | 604 | case SCM_M_CALL: |
9331f91c | 605 | return scm_cons (unmemoize (CAR (args)), unmemoize_exprs (CDDR (args))); |
b7742c6b | 606 | case SCM_M_CONT: |
bc056057 AW |
607 | return scm_list_2 (scm_from_latin1_symbol |
608 | ("call-with-current_continuation"), | |
609 | unmemoize (args)); | |
b7742c6b | 610 | case SCM_M_CALL_WITH_VALUES: |
0fcc39a0 | 611 | return scm_list_3 (scm_from_latin1_symbol ("call-with-values"), |
b7742c6b AW |
612 | unmemoize (CAR (args)), unmemoize (CDR (args))); |
613 | case SCM_M_DEFINE: | |
614 | return scm_list_3 (scm_sym_define, CAR (args), unmemoize (CDR (args))); | |
615 | case SCM_M_IF: | |
616 | return scm_list_4 (scm_sym_if, unmemoize (scm_car (args)), | |
617 | unmemoize (scm_cadr (args)), unmemoize (scm_cddr (args))); | |
618 | case SCM_M_LAMBDA: | |
c438cd71 LC |
619 | { |
620 | SCM body = CAR (args), spec = CDDR (args); | |
621 | ||
622 | if (scm_is_null (CDR (spec))) | |
623 | return scm_list_3 (scm_sym_lambda, | |
624 | scm_make_list (CAR (spec), sym_placeholder), | |
625 | unmemoize (CAR (args))); | |
626 | else if (scm_is_null (SCM_CDDR (spec))) | |
627 | { | |
628 | SCM formals = scm_make_list (CAR (spec), sym_placeholder); | |
629 | return scm_list_3 (scm_sym_lambda, | |
630 | scm_is_true (CADR (spec)) | |
631 | ? scm_cons_star (sym_placeholder, formals) | |
632 | : formals, | |
633 | unmemoize (CAR (args))); | |
634 | } | |
635 | else | |
636 | { | |
637 | SCM alt, tail; | |
638 | ||
639 | alt = CADDR (CDDDR (spec)); | |
640 | if (scm_is_true (alt)) | |
641 | tail = CDR (unmemoize (alt)); | |
642 | else | |
643 | tail = SCM_EOL; | |
644 | ||
645 | return scm_cons | |
646 | (sym_case_lambda_star, | |
647 | scm_cons (scm_list_2 (scm_list_5 (CAR (spec), | |
648 | CADR (spec), | |
649 | CADDR (spec), | |
650 | CADDDR (spec), | |
651 | unmemoize_exprs (CADR (CDDDR (spec)))), | |
652 | unmemoize (body)), | |
653 | tail)); | |
654 | } | |
655 | } | |
b7742c6b AW |
656 | case SCM_M_LET: |
657 | return scm_list_3 (scm_sym_let, | |
658 | unmemoize_bindings (CAR (args)), | |
659 | unmemoize (CDR (args))); | |
660 | case SCM_M_QUOTE: | |
661 | return scm_list_2 (scm_sym_quote, args); | |
662 | case SCM_M_LEXICAL_REF: | |
663 | return unmemoize_lexical (args); | |
664 | case SCM_M_LEXICAL_SET: | |
665 | return scm_list_3 (scm_sym_set_x, unmemoize_lexical (CAR (args)), | |
666 | unmemoize (CDR (args))); | |
667 | case SCM_M_TOPLEVEL_REF: | |
668 | return args; | |
669 | case SCM_M_TOPLEVEL_SET: | |
670 | return scm_list_3 (scm_sym_set_x, CAR (args), unmemoize (CDR (args))); | |
671 | case SCM_M_MODULE_REF: | |
c08899ff AW |
672 | return SCM_VARIABLEP (args) ? args |
673 | : scm_list_3 (scm_is_true (CDDR (args)) ? scm_sym_at : scm_sym_atat, | |
674 | scm_i_finite_list_copy (CAR (args)), | |
675 | CADR (args)); | |
b7742c6b AW |
676 | case SCM_M_MODULE_SET: |
677 | return scm_list_3 (scm_sym_set_x, | |
c08899ff AW |
678 | SCM_VARIABLEP (CDR (args)) ? CDR (args) |
679 | : scm_list_3 (scm_is_true (CDDDR (args)) | |
680 | ? scm_sym_at : scm_sym_atat, | |
681 | scm_i_finite_list_copy (CADR (args)), | |
682 | CADDR (args)), | |
b7742c6b | 683 | unmemoize (CAR (args))); |
1773bc7d AW |
684 | case SCM_M_CALL_WITH_PROMPT: |
685 | return scm_list_4 (scm_from_latin1_symbol ("call-with-prompt"), | |
747022e4 AW |
686 | unmemoize (CAR (args)), |
687 | unmemoize (CADR (args)), | |
688 | unmemoize (CDDR (args))); | |
b7742c6b AW |
689 | default: |
690 | abort (); | |
691 | } | |
692 | } | |
693 | ||
2cd72a84 AW |
694 | |
695 | \f | |
696 | ||
b7742c6b AW |
697 | SCM_DEFINE (scm_unmemoize_expression, "unmemoize-expression", 1, 0, 0, |
698 | (SCM m), | |
699 | "Unmemoize the memoized expression @var{m}.") | |
700 | #define FUNC_NAME s_scm_unmemoize_expression | |
701 | { | |
b7742c6b AW |
702 | return unmemoize (m); |
703 | } | |
704 | #undef FUNC_NAME | |
705 | ||
3149a5b6 AW |
706 | SCM_DEFINE (scm_memoized_typecode, "memoized-typecode", 1, 0, 0, |
707 | (SCM sym), | |
708 | "Return the memoized typecode corresponding to the symbol @var{sym}.") | |
709 | #define FUNC_NAME s_scm_memoized_typecode | |
710 | { | |
711 | int i; | |
712 | ||
713 | SCM_VALIDATE_SYMBOL (1, sym); | |
714 | ||
715 | for (i = 0; i < sizeof(memoized_tags)/sizeof(const char*); i++) | |
716 | if (strcmp (scm_i_symbol_chars (sym), memoized_tags[i]) == 0) | |
717 | return scm_from_int32 (i); | |
718 | ||
719 | return SCM_BOOL_F; | |
720 | } | |
721 | #undef FUNC_NAME | |
722 | ||
723 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); | |
724 | static void error_unbound_variable (SCM symbol) SCM_NORETURN; | |
725 | static void error_unbound_variable (SCM symbol) | |
726 | { | |
727 | scm_error (scm_unbound_variable_key, NULL, "Unbound variable: ~S", | |
728 | scm_list_1 (symbol), SCM_BOOL_F); | |
729 | } | |
730 | ||
731 | SCM_DEFINE (scm_memoize_variable_access_x, "memoize-variable-access!", 2, 0, 0, | |
732 | (SCM m, SCM mod), | |
733 | "Look up and cache the variable that @var{m} will access, returning the variable.") | |
7230aaf9 | 734 | #define FUNC_NAME s_scm_memoize_variable_access_x |
3149a5b6 | 735 | { |
0720f70e AW |
736 | SCM mx = SCM_MEMOIZED_ARGS (m); |
737 | ||
3149a5b6 AW |
738 | switch (SCM_MEMOIZED_TAG (m)) |
739 | { | |
740 | case SCM_M_TOPLEVEL_REF: | |
741 | if (SCM_VARIABLEP (mx)) | |
742 | return mx; | |
743 | else | |
744 | { | |
745 | SCM var = scm_module_variable (mod, mx); | |
746 | if (scm_is_false (var) || scm_is_false (scm_variable_bound_p (var))) | |
747 | error_unbound_variable (mx); | |
0720f70e | 748 | SCM_SETCDR (m, var); |
3149a5b6 AW |
749 | return var; |
750 | } | |
751 | ||
752 | case SCM_M_TOPLEVEL_SET: | |
753 | { | |
754 | SCM var = CAR (mx); | |
755 | if (SCM_VARIABLEP (var)) | |
756 | return var; | |
757 | else | |
758 | { | |
759 | var = scm_module_variable (mod, var); | |
760 | if (scm_is_false (var)) | |
761 | error_unbound_variable (CAR (mx)); | |
762 | SCM_SETCAR (mx, var); | |
763 | return var; | |
764 | } | |
765 | } | |
766 | ||
767 | case SCM_M_MODULE_REF: | |
768 | if (SCM_VARIABLEP (mx)) | |
769 | return mx; | |
770 | else | |
771 | { | |
772 | SCM var; | |
773 | mod = scm_resolve_module (CAR (mx)); | |
774 | if (scm_is_true (CDDR (mx))) | |
775 | mod = scm_module_public_interface (mod); | |
776 | var = scm_module_lookup (mod, CADR (mx)); | |
777 | if (scm_is_false (scm_variable_bound_p (var))) | |
778 | error_unbound_variable (CADR (mx)); | |
0720f70e | 779 | SCM_SETCDR (m, var); |
3149a5b6 AW |
780 | return var; |
781 | } | |
782 | ||
783 | case SCM_M_MODULE_SET: | |
784 | /* FIXME: not quite threadsafe */ | |
785 | if (SCM_VARIABLEP (CDR (mx))) | |
786 | return CDR (mx); | |
787 | else | |
788 | { | |
789 | SCM var; | |
790 | mod = scm_resolve_module (CADR (mx)); | |
791 | if (scm_is_true (CDDDR (mx))) | |
792 | mod = scm_module_public_interface (mod); | |
793 | var = scm_module_lookup (mod, CADDR (mx)); | |
794 | SCM_SETCDR (mx, var); | |
795 | return var; | |
796 | } | |
797 | ||
798 | default: | |
799 | scm_wrong_type_arg (FUNC_NAME, 1, m); | |
800 | return SCM_BOOL_F; | |
801 | } | |
802 | } | |
803 | #undef FUNC_NAME | |
804 | ||
b7742c6b AW |
805 | |
806 | \f | |
807 | ||
808 | void | |
809 | scm_init_memoize () | |
810 | { | |
b7742c6b | 811 | #include "libguile/memoize.x" |
4f692ace | 812 | |
bb97e4ab AW |
813 | wind = scm_c_make_gsubr ("wind", 2, 0, 0, do_wind); |
814 | unwind = scm_c_make_gsubr ("unwind", 0, 0, 0, do_unwind); | |
c32b7c4c AW |
815 | push_fluid = scm_c_make_gsubr ("push-fluid", 2, 0, 0, do_push_fluid); |
816 | pop_fluid = scm_c_make_gsubr ("pop-fluid", 0, 0, 0, do_pop_fluid); | |
bb97e4ab | 817 | |
4a655e50 | 818 | list_of_guile = scm_list_1 (scm_from_latin1_symbol ("guile")); |
b7742c6b AW |
819 | } |
820 | ||
821 | /* | |
822 | Local Variables: | |
823 | c-file-style: "gnu" | |
824 | End: | |
825 | */ |