Commit | Line | Data |
---|---|---|
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 AW |
111 | #define MAKMEMO(n, args) \ |
112 | (scm_cell (scm_tc16_memoized | ((n) << 16), SCM_UNPACK (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 | ||
182 | static int | |
183 | scm_print_memoized (SCM memoized, SCM port, scm_print_state *pstate) | |
184 | { | |
0607ebbf | 185 | scm_puts_unlocked ("#<memoized ", port); |
b7742c6b | 186 | scm_write (scm_unmemoize_expression (memoized), port); |
0607ebbf | 187 | scm_puts_unlocked (">", port); |
b7742c6b AW |
188 | return 1; |
189 | } | |
190 | ||
b7742c6b | 191 | |
b7742c6b AW |
192 | \f |
193 | ||
194 | ||
b7742c6b | 195 | static int |
cfc28c80 AW |
196 | try_lookup_rib (SCM x, SCM rib) |
197 | { | |
198 | int idx = 0; | |
199 | for (; idx < VECTOR_LENGTH (rib); idx++) | |
200 | if (scm_is_eq (x, VECTOR_REF (rib, idx))) | |
201 | return idx; /* bound */ | |
202 | return -1; | |
203 | } | |
204 | ||
205 | static int | |
206 | lookup_rib (SCM x, SCM rib) | |
207 | { | |
208 | int idx = try_lookup_rib (x, rib); | |
209 | if (idx < 0) | |
210 | abort (); | |
211 | return idx; | |
212 | } | |
213 | ||
214 | static SCM | |
215 | make_pos (int depth, int width) | |
216 | { | |
217 | return scm_cons (SCM_I_MAKINUM (depth), SCM_I_MAKINUM (width)); | |
218 | } | |
219 | ||
220 | static SCM | |
dc3e203e | 221 | lookup (SCM x, SCM env) |
b7742c6b | 222 | { |
cfc28c80 AW |
223 | int d = 0; |
224 | for (; scm_is_pair (env); env = CDR (env), d++) | |
225 | { | |
226 | int w = try_lookup_rib (x, CAR (env)); | |
227 | if (w < 0) | |
228 | continue; | |
229 | return make_pos (d, w); | |
230 | } | |
dc3e203e | 231 | abort (); |
b7742c6b AW |
232 | } |
233 | ||
dc3e203e AW |
234 | /* Abbreviate SCM_EXPANDED_REF. Copied because I'm not sure about symbol pasting */ |
235 | #define REF(x,type,field) \ | |
236 | (scm_struct_ref (x, SCM_I_MAKINUM (SCM_EXPANDED_##type##_##field))) | |
b7742c6b | 237 | |
dc3e203e | 238 | static SCM list_of_guile = SCM_BOOL_F; |
b7742c6b | 239 | |
dc3e203e | 240 | static SCM memoize (SCM exp, SCM env); |
b7742c6b AW |
241 | |
242 | static SCM | |
dc3e203e | 243 | memoize_exps (SCM exps, SCM env) |
b7742c6b | 244 | { |
dc3e203e AW |
245 | SCM ret; |
246 | for (ret = SCM_EOL; scm_is_pair (exps); exps = CDR (exps)) | |
247 | ret = scm_cons (memoize (CAR (exps), env), ret); | |
248 | return scm_reverse_x (ret, SCM_UNDEFINED); | |
7572ee52 | 249 | } |
7572ee52 | 250 | |
7572ee52 | 251 | static SCM |
dc3e203e | 252 | memoize (SCM exp, SCM env) |
b7742c6b | 253 | { |
dc3e203e AW |
254 | if (!SCM_EXPANDED_P (exp)) |
255 | abort (); | |
b7742c6b | 256 | |
dc3e203e | 257 | switch (SCM_EXPANDED_TYPE (exp)) |
b7742c6b | 258 | { |
dc3e203e AW |
259 | case SCM_EXPANDED_VOID: |
260 | return MAKMEMO_QUOTE (SCM_UNSPECIFIED); | |
261 | ||
262 | case SCM_EXPANDED_CONST: | |
263 | return MAKMEMO_QUOTE (REF (exp, CONST, EXP)); | |
b7742c6b | 264 | |
dc3e203e AW |
265 | case SCM_EXPANDED_PRIMITIVE_REF: |
266 | if (scm_is_eq (scm_current_module (), scm_the_root_module ())) | |
267 | return MAKMEMO_TOP_REF (REF (exp, PRIMITIVE_REF, NAME)); | |
268 | else | |
269 | return MAKMEMO_MOD_REF (list_of_guile, REF (exp, PRIMITIVE_REF, NAME), | |
270 | SCM_BOOL_F); | |
271 | ||
272 | case SCM_EXPANDED_LEXICAL_REF: | |
273 | return MAKMEMO_LEX_REF (lookup (REF (exp, LEXICAL_REF, GENSYM), env)); | |
274 | ||
275 | case SCM_EXPANDED_LEXICAL_SET: | |
276 | return MAKMEMO_LEX_SET (lookup (REF (exp, LEXICAL_SET, GENSYM), env), | |
277 | memoize (REF (exp, LEXICAL_SET, EXP), env)); | |
278 | ||
279 | case SCM_EXPANDED_MODULE_REF: | |
280 | return MAKMEMO_MOD_REF (REF (exp, MODULE_REF, MOD), | |
281 | REF (exp, MODULE_REF, NAME), | |
282 | REF (exp, MODULE_REF, PUBLIC)); | |
283 | ||
284 | case SCM_EXPANDED_MODULE_SET: | |
285 | return MAKMEMO_MOD_SET (memoize (REF (exp, MODULE_SET, EXP), env), | |
286 | REF (exp, MODULE_SET, MOD), | |
287 | REF (exp, MODULE_SET, NAME), | |
288 | REF (exp, MODULE_SET, PUBLIC)); | |
289 | ||
290 | case SCM_EXPANDED_TOPLEVEL_REF: | |
291 | return MAKMEMO_TOP_REF (REF (exp, TOPLEVEL_REF, NAME)); | |
292 | ||
293 | case SCM_EXPANDED_TOPLEVEL_SET: | |
294 | return MAKMEMO_TOP_SET (REF (exp, TOPLEVEL_SET, NAME), | |
295 | memoize (REF (exp, TOPLEVEL_SET, EXP), env)); | |
296 | ||
297 | case SCM_EXPANDED_TOPLEVEL_DEFINE: | |
298 | return MAKMEMO_DEFINE (REF (exp, TOPLEVEL_DEFINE, NAME), | |
299 | memoize (REF (exp, TOPLEVEL_DEFINE, EXP), env)); | |
300 | ||
301 | case SCM_EXPANDED_CONDITIONAL: | |
302 | return MAKMEMO_IF (memoize (REF (exp, CONDITIONAL, TEST), env), | |
303 | memoize (REF (exp, CONDITIONAL, CONSEQUENT), env), | |
304 | memoize (REF (exp, CONDITIONAL, ALTERNATE), env)); | |
305 | ||
7081d4f9 | 306 | case SCM_EXPANDED_CALL: |
dc3e203e AW |
307 | { |
308 | SCM proc, args; | |
b7742c6b | 309 | |
7081d4f9 AW |
310 | proc = REF (exp, CALL, PROC); |
311 | args = memoize_exps (REF (exp, CALL, ARGS), env); | |
b7742c6b | 312 | |
dc3e203e AW |
313 | return MAKMEMO_CALL (memoize (proc, env), scm_ilength (args), args); |
314 | } | |
b7742c6b | 315 | |
a881a4ae AW |
316 | case SCM_EXPANDED_PRIMCALL: |
317 | { | |
1773bc7d AW |
318 | SCM name, args; |
319 | int nargs; | |
a881a4ae | 320 | |
1773bc7d | 321 | name = REF (exp, PRIMCALL, NAME); |
a881a4ae | 322 | args = memoize_exps (REF (exp, PRIMCALL, ARGS), env); |
1773bc7d AW |
323 | nargs = scm_ilength (args); |
324 | ||
325 | if (nargs == 3 | |
326 | && scm_is_eq (name, scm_from_latin1_symbol ("call-with-prompt"))) | |
327 | return MAKMEMO_CALL_WITH_PROMPT (CAR (args), | |
328 | CADR (args), | |
329 | CADDR (args)); | |
39caffe7 AW |
330 | else if (nargs == 2 |
331 | && scm_is_eq (name, scm_from_latin1_symbol ("apply"))) | |
332 | return MAKMEMO_APPLY (CAR (args), CADR (args)); | |
bc056057 AW |
333 | else if (nargs == 1 |
334 | && scm_is_eq (name, | |
335 | scm_from_latin1_symbol | |
336 | ("call-with-current-continuation"))) | |
337 | return MAKMEMO_CONT (CAR (args)); | |
0fcc39a0 AW |
338 | else if (nargs == 2 |
339 | && scm_is_eq (name, | |
340 | scm_from_latin1_symbol ("call-with-values"))) | |
341 | return MAKMEMO_CALL_WITH_VALUES (CAR (args), CADR (args)); | |
bb97e4ab AW |
342 | else if (nargs == 2 |
343 | && scm_is_eq (name, scm_from_latin1_symbol ("wind"))) | |
344 | return MAKMEMO_CALL (MAKMEMO_QUOTE (wind), 2, args); | |
345 | else if (nargs == 0 | |
346 | && scm_is_eq (name, scm_from_latin1_symbol ("unwind"))) | |
347 | return MAKMEMO_CALL (MAKMEMO_QUOTE (unwind), 0, SCM_EOL); | |
c32b7c4c AW |
348 | else if (nargs == 2 |
349 | && scm_is_eq (name, scm_from_latin1_symbol ("push-fluid"))) | |
350 | return MAKMEMO_CALL (MAKMEMO_QUOTE (push_fluid), 2, args); | |
351 | else if (nargs == 0 | |
352 | && scm_is_eq (name, scm_from_latin1_symbol ("pop-fluid"))) | |
353 | return MAKMEMO_CALL (MAKMEMO_QUOTE (pop_fluid), 0, SCM_EOL); | |
1773bc7d AW |
354 | else if (scm_is_eq (scm_current_module (), scm_the_root_module ())) |
355 | return MAKMEMO_CALL (MAKMEMO_TOP_REF (name), nargs, args); | |
356 | else | |
357 | return MAKMEMO_CALL (MAKMEMO_MOD_REF (list_of_guile, name, | |
358 | SCM_BOOL_F), | |
359 | nargs, | |
360 | args); | |
a881a4ae AW |
361 | } |
362 | ||
6fc3eae4 AW |
363 | case SCM_EXPANDED_SEQ: |
364 | return MAKMEMO_SEQ (memoize (REF (exp, SEQ, HEAD), env), | |
365 | memoize (REF (exp, SEQ, TAIL), env)); | |
b7742c6b | 366 | |
dc3e203e | 367 | case SCM_EXPANDED_LAMBDA: |
19113f1c | 368 | /* The body will be a lambda-case or #f. */ |
c438cd71 | 369 | { |
27ecfd36 | 370 | SCM meta, body, proc; |
c438cd71 LC |
371 | |
372 | meta = REF (exp, LAMBDA, META); | |
c438cd71 | 373 | |
19113f1c AW |
374 | body = REF (exp, LAMBDA, BODY); |
375 | if (scm_is_false (body)) | |
376 | /* Give a body to case-lambda with no clauses. */ | |
377 | proc = MAKMEMO_LAMBDA | |
378 | (MAKMEMO_CALL | |
379 | (MAKMEMO_MOD_REF (list_of_guile, | |
380 | scm_from_latin1_symbol ("throw"), | |
381 | SCM_BOOL_F), | |
382 | 5, | |
383 | scm_list_5 (MAKMEMO_QUOTE (scm_args_number_key), | |
384 | MAKMEMO_QUOTE (SCM_BOOL_F), | |
385 | MAKMEMO_QUOTE (scm_from_latin1_string | |
386 | ("Wrong number of arguments")), | |
387 | MAKMEMO_QUOTE (SCM_EOL), | |
388 | MAKMEMO_QUOTE (SCM_BOOL_F))), | |
389 | FIXED_ARITY (0), | |
27ecfd36 | 390 | meta); |
19113f1c | 391 | else |
27ecfd36 AW |
392 | { |
393 | proc = memoize (body, env); | |
394 | SCM_SETCAR (SCM_CDR (SCM_MEMOIZED_ARGS (proc)), meta); | |
395 | } | |
c438cd71 LC |
396 | |
397 | return proc; | |
398 | } | |
b7742c6b | 399 | |
dc3e203e AW |
400 | case SCM_EXPANDED_LAMBDA_CASE: |
401 | { | |
402 | SCM req, rest, opt, kw, inits, vars, body, alt; | |
cfc28c80 AW |
403 | SCM walk, minits, arity, rib, new_env; |
404 | int nreq, nopt; | |
dc3e203e AW |
405 | |
406 | req = REF (exp, LAMBDA_CASE, REQ); | |
d61d6686 | 407 | rest = scm_not (scm_not (REF (exp, LAMBDA_CASE, REST))); |
dc3e203e AW |
408 | opt = REF (exp, LAMBDA_CASE, OPT); |
409 | kw = REF (exp, LAMBDA_CASE, KW); | |
410 | inits = REF (exp, LAMBDA_CASE, INITS); | |
411 | vars = REF (exp, LAMBDA_CASE, GENSYMS); | |
412 | body = REF (exp, LAMBDA_CASE, BODY); | |
413 | alt = REF (exp, LAMBDA_CASE, ALTERNATE); | |
414 | ||
415 | nreq = scm_ilength (req); | |
416 | nopt = scm_is_pair (opt) ? scm_ilength (opt) : 0; | |
417 | ||
418 | /* The vars are the gensyms, according to the divine plan. But we need | |
419 | to memoize the inits within their appropriate environment, | |
420 | complicating things. */ | |
cfc28c80 AW |
421 | rib = scm_vector (vars); |
422 | new_env = scm_cons (rib, env); | |
dc3e203e AW |
423 | |
424 | minits = SCM_EOL; | |
cfc28c80 AW |
425 | for (walk = inits; scm_is_pair (walk); walk = CDR (walk)) |
426 | minits = scm_cons (memoize (CAR (walk), new_env), minits); | |
dc3e203e | 427 | minits = scm_reverse_x (minits, SCM_UNDEFINED); |
b7742c6b | 428 | |
632ddbf0 AW |
429 | if (scm_is_true (kw)) |
430 | { | |
431 | /* (aok? (kw name sym) ...) -> (aok? (kw . index) ...) */ | |
432 | SCM aok = CAR (kw), indices = SCM_EOL; | |
433 | for (kw = CDR (kw); scm_is_pair (kw); kw = CDR (kw)) | |
434 | { | |
435 | SCM k; | |
436 | int idx; | |
437 | ||
438 | k = CAR (CAR (kw)); | |
cfc28c80 | 439 | idx = lookup_rib (CADDR (CAR (kw)), rib); |
632ddbf0 AW |
440 | indices = scm_acons (k, SCM_I_MAKINUM (idx), indices); |
441 | } | |
442 | kw = scm_cons (aok, scm_reverse_x (indices, SCM_UNDEFINED)); | |
443 | } | |
444 | ||
dc3e203e AW |
445 | if (scm_is_false (alt) && scm_is_false (kw) && scm_is_false (opt)) |
446 | { | |
447 | if (scm_is_false (rest)) | |
448 | arity = FIXED_ARITY (nreq); | |
449 | else | |
450 | arity = REST_ARITY (nreq, SCM_BOOL_T); | |
451 | } | |
452 | else if (scm_is_true (alt)) | |
453 | arity = FULL_ARITY (nreq, rest, nopt, kw, minits, | |
454 | SCM_MEMOIZED_ARGS (memoize (alt, env))); | |
455 | else | |
456 | arity = FULL_ARITY (nreq, rest, nopt, kw, minits, SCM_BOOL_F); | |
b7742c6b | 457 | |
c438cd71 | 458 | return MAKMEMO_LAMBDA (memoize (body, new_env), arity, |
27ecfd36 | 459 | SCM_BOOL_F /* meta, filled in later */); |
dc3e203e | 460 | } |
b7742c6b | 461 | |
dc3e203e AW |
462 | case SCM_EXPANDED_LET: |
463 | { | |
cfc28c80 AW |
464 | SCM vars, exps, body, varsv, inits, new_env; |
465 | int i; | |
dc3e203e AW |
466 | |
467 | vars = REF (exp, LET, GENSYMS); | |
468 | exps = REF (exp, LET, VALS); | |
469 | body = REF (exp, LET, BODY); | |
470 | ||
cfc28c80 AW |
471 | varsv = scm_vector (vars); |
472 | inits = scm_c_make_vector (VECTOR_LENGTH (varsv), | |
473 | SCM_BOOL_F); | |
474 | new_env = scm_cons (varsv, env); | |
475 | for (i = 0; scm_is_pair (exps); exps = CDR (exps), i++) | |
476 | VECTOR_SET (inits, i, memoize (CAR (exps), env)); | |
477 | ||
478 | return MAKMEMO_LET (inits, memoize (body, new_env)); | |
dc3e203e | 479 | } |
b7742c6b | 480 | |
dc3e203e AW |
481 | case SCM_EXPANDED_LETREC: |
482 | { | |
cfc28c80 | 483 | SCM vars, varsv, exps, expsv, body, undefs, new_env; |
826373a2 | 484 | int i, nvars, in_order_p; |
dc3e203e | 485 | |
f238862e AW |
486 | vars = REF (exp, LETREC, GENSYMS); |
487 | exps = REF (exp, LETREC, VALS); | |
488 | body = REF (exp, LETREC, BODY); | |
826373a2 | 489 | in_order_p = scm_is_true (REF (exp, LETREC, IN_ORDER_P)); |
dc3e203e | 490 | |
cfc28c80 AW |
491 | varsv = scm_vector (vars); |
492 | nvars = VECTOR_LENGTH (varsv); | |
493 | expsv = scm_vector (exps); | |
494 | ||
495 | undefs = scm_c_make_vector (nvars, MAKMEMO_QUOTE (SCM_UNDEFINED)); | |
496 | new_env = scm_cons (varsv, env); | |
b7742c6b | 497 | |
826373a2 AW |
498 | if (in_order_p) |
499 | { | |
cfc28c80 AW |
500 | SCM body_exps = memoize (body, new_env); |
501 | for (i = nvars - 1; i >= 0; i--) | |
502 | { | |
503 | SCM init = memoize (VECTOR_REF (expsv, i), new_env); | |
504 | body_exps = MAKMEMO_SEQ (MAKMEMO_LEX_SET (make_pos (0, i), init), | |
505 | body_exps); | |
506 | } | |
507 | return MAKMEMO_LET (undefs, body_exps); | |
826373a2 AW |
508 | } |
509 | else | |
510 | { | |
cfc28c80 AW |
511 | SCM sets = SCM_BOOL_F, inits = scm_c_make_vector (nvars, SCM_BOOL_F); |
512 | for (i = nvars - 1; i >= 0; i--) | |
826373a2 | 513 | { |
cfc28c80 AW |
514 | SCM init, set; |
515 | ||
516 | init = memoize (VECTOR_REF (expsv, i), new_env); | |
517 | VECTOR_SET (inits, i, init); | |
518 | ||
519 | set = MAKMEMO_LEX_SET (make_pos (1, i), | |
520 | MAKMEMO_LEX_REF (make_pos (0, i))); | |
521 | if (scm_is_false (sets)) | |
522 | sets = set; | |
523 | else | |
524 | sets = MAKMEMO_SEQ (set, sets); | |
826373a2 | 525 | } |
6fc3eae4 | 526 | |
cfc28c80 | 527 | if (scm_is_false (sets)) |
6fc3eae4 AW |
528 | return memoize (body, env); |
529 | ||
6fc3eae4 | 530 | return MAKMEMO_LET (undefs, |
cfc28c80 | 531 | MAKMEMO_SEQ (MAKMEMO_LET (inits, sets), |
6fc3eae4 | 532 | memoize (body, new_env))); |
826373a2 | 533 | } |
dc3e203e | 534 | } |
b7742c6b | 535 | |
b7742c6b | 536 | default: |
dc3e203e | 537 | abort (); |
b7742c6b AW |
538 | } |
539 | } | |
540 | ||
541 | ||
542 | \f | |
543 | ||
544 | SCM_DEFINE (scm_memoize_expression, "memoize-expression", 1, 0, 0, | |
545 | (SCM exp), | |
546 | "Memoize the expression @var{exp}.") | |
547 | #define FUNC_NAME s_scm_memoize_expression | |
548 | { | |
a310a1d1 | 549 | SCM_ASSERT_TYPE (SCM_EXPANDED_P (exp), exp, 1, FUNC_NAME, "expanded"); |
b7742c6b AW |
550 | return memoize (exp, scm_current_module ()); |
551 | } | |
552 | #undef FUNC_NAME | |
553 | ||
2cd72a84 | 554 | |
b7742c6b AW |
555 | \f |
556 | ||
b7742c6b AW |
557 | SCM_SYMBOL (sym_placeholder, "_"); |
558 | ||
559 | static SCM unmemoize (SCM expr); | |
560 | ||
561 | static SCM | |
562 | unmemoize_exprs (SCM exprs) | |
563 | { | |
564 | SCM ret, tail; | |
565 | if (scm_is_null (exprs)) | |
566 | return SCM_EOL; | |
567 | ret = scm_list_1 (unmemoize (CAR (exprs))); | |
568 | tail = ret; | |
569 | for (exprs = CDR (exprs); !scm_is_null (exprs); exprs = CDR (exprs)) | |
570 | { | |
571 | SCM_SETCDR (tail, scm_list_1 (unmemoize (CAR (exprs)))); | |
572 | tail = CDR (tail); | |
573 | } | |
574 | return ret; | |
575 | } | |
576 | ||
577 | static SCM | |
578 | unmemoize_bindings (SCM inits) | |
579 | { | |
cfc28c80 AW |
580 | SCM ret = SCM_EOL; |
581 | int n = scm_c_vector_length (inits); | |
582 | ||
583 | while (n--) | |
584 | ret = scm_cons (unmemoize (scm_c_vector_ref (inits, n)), ret); | |
585 | ||
b7742c6b AW |
586 | return ret; |
587 | } | |
588 | ||
589 | static SCM | |
590 | unmemoize_lexical (SCM n) | |
591 | { | |
cfc28c80 AW |
592 | char buf[32]; |
593 | buf[31] = 0; | |
594 | snprintf (buf, 31, "<%u,%u>", scm_to_uint32 (CAR (n)), | |
595 | scm_to_uint32 (CDR (n))); | |
25d50a05 | 596 | return scm_from_utf8_symbol (buf); |
b7742c6b AW |
597 | } |
598 | ||
599 | static SCM | |
600 | unmemoize (const SCM expr) | |
601 | { | |
602 | SCM args; | |
603 | ||
604 | if (!SCM_MEMOIZED_P (expr)) | |
605 | abort (); | |
606 | ||
607 | args = SCM_MEMOIZED_ARGS (expr); | |
608 | switch (SCM_MEMOIZED_TAG (expr)) | |
609 | { | |
610 | case SCM_M_APPLY: | |
39caffe7 AW |
611 | return scm_cons (scm_from_latin1_symbol ("apply"), |
612 | unmemoize_exprs (args)); | |
6fc3eae4 AW |
613 | case SCM_M_SEQ: |
614 | return scm_list_3 (scm_sym_begin, unmemoize (CAR (args)), | |
615 | unmemoize (CDR (args))); | |
b7742c6b | 616 | case SCM_M_CALL: |
9331f91c | 617 | return scm_cons (unmemoize (CAR (args)), unmemoize_exprs (CDDR (args))); |
b7742c6b | 618 | case SCM_M_CONT: |
bc056057 AW |
619 | return scm_list_2 (scm_from_latin1_symbol |
620 | ("call-with-current_continuation"), | |
621 | unmemoize (args)); | |
b7742c6b | 622 | case SCM_M_CALL_WITH_VALUES: |
0fcc39a0 | 623 | return scm_list_3 (scm_from_latin1_symbol ("call-with-values"), |
b7742c6b AW |
624 | unmemoize (CAR (args)), unmemoize (CDR (args))); |
625 | case SCM_M_DEFINE: | |
626 | return scm_list_3 (scm_sym_define, CAR (args), unmemoize (CDR (args))); | |
627 | case SCM_M_IF: | |
628 | return scm_list_4 (scm_sym_if, unmemoize (scm_car (args)), | |
629 | unmemoize (scm_cadr (args)), unmemoize (scm_cddr (args))); | |
630 | case SCM_M_LAMBDA: | |
c438cd71 LC |
631 | { |
632 | SCM body = CAR (args), spec = CDDR (args); | |
633 | ||
634 | if (scm_is_null (CDR (spec))) | |
635 | return scm_list_3 (scm_sym_lambda, | |
636 | scm_make_list (CAR (spec), sym_placeholder), | |
637 | unmemoize (CAR (args))); | |
638 | else if (scm_is_null (SCM_CDDR (spec))) | |
639 | { | |
640 | SCM formals = scm_make_list (CAR (spec), sym_placeholder); | |
641 | return scm_list_3 (scm_sym_lambda, | |
642 | scm_is_true (CADR (spec)) | |
643 | ? scm_cons_star (sym_placeholder, formals) | |
644 | : formals, | |
645 | unmemoize (CAR (args))); | |
646 | } | |
647 | else | |
648 | { | |
649 | SCM alt, tail; | |
650 | ||
651 | alt = CADDR (CDDDR (spec)); | |
652 | if (scm_is_true (alt)) | |
653 | tail = CDR (unmemoize (alt)); | |
654 | else | |
655 | tail = SCM_EOL; | |
656 | ||
657 | return scm_cons | |
658 | (sym_case_lambda_star, | |
659 | scm_cons (scm_list_2 (scm_list_5 (CAR (spec), | |
660 | CADR (spec), | |
661 | CADDR (spec), | |
662 | CADDDR (spec), | |
663 | unmemoize_exprs (CADR (CDDDR (spec)))), | |
664 | unmemoize (body)), | |
665 | tail)); | |
666 | } | |
667 | } | |
b7742c6b AW |
668 | case SCM_M_LET: |
669 | return scm_list_3 (scm_sym_let, | |
670 | unmemoize_bindings (CAR (args)), | |
671 | unmemoize (CDR (args))); | |
672 | case SCM_M_QUOTE: | |
673 | return scm_list_2 (scm_sym_quote, args); | |
674 | case SCM_M_LEXICAL_REF: | |
675 | return unmemoize_lexical (args); | |
676 | case SCM_M_LEXICAL_SET: | |
677 | return scm_list_3 (scm_sym_set_x, unmemoize_lexical (CAR (args)), | |
678 | unmemoize (CDR (args))); | |
679 | case SCM_M_TOPLEVEL_REF: | |
680 | return args; | |
681 | case SCM_M_TOPLEVEL_SET: | |
682 | return scm_list_3 (scm_sym_set_x, CAR (args), unmemoize (CDR (args))); | |
683 | case SCM_M_MODULE_REF: | |
c08899ff AW |
684 | return SCM_VARIABLEP (args) ? args |
685 | : scm_list_3 (scm_is_true (CDDR (args)) ? scm_sym_at : scm_sym_atat, | |
686 | scm_i_finite_list_copy (CAR (args)), | |
687 | CADR (args)); | |
b7742c6b AW |
688 | case SCM_M_MODULE_SET: |
689 | return scm_list_3 (scm_sym_set_x, | |
c08899ff AW |
690 | SCM_VARIABLEP (CDR (args)) ? CDR (args) |
691 | : scm_list_3 (scm_is_true (CDDDR (args)) | |
692 | ? scm_sym_at : scm_sym_atat, | |
693 | scm_i_finite_list_copy (CADR (args)), | |
694 | CADDR (args)), | |
b7742c6b | 695 | unmemoize (CAR (args))); |
1773bc7d AW |
696 | case SCM_M_CALL_WITH_PROMPT: |
697 | return scm_list_4 (scm_from_latin1_symbol ("call-with-prompt"), | |
747022e4 AW |
698 | unmemoize (CAR (args)), |
699 | unmemoize (CADR (args)), | |
700 | unmemoize (CDDR (args))); | |
b7742c6b AW |
701 | default: |
702 | abort (); | |
703 | } | |
704 | } | |
705 | ||
2cd72a84 AW |
706 | |
707 | \f | |
708 | ||
b7742c6b AW |
709 | SCM_DEFINE (scm_memoized_p, "memoized?", 1, 0, 0, |
710 | (SCM obj), | |
711 | "Return @code{#t} if @var{obj} is memoized.") | |
712 | #define FUNC_NAME s_scm_memoized_p | |
713 | { | |
714 | return scm_from_bool (SCM_MEMOIZED_P (obj)); | |
715 | } | |
716 | #undef FUNC_NAME | |
717 | ||
718 | SCM_DEFINE (scm_unmemoize_expression, "unmemoize-expression", 1, 0, 0, | |
719 | (SCM m), | |
720 | "Unmemoize the memoized expression @var{m}.") | |
721 | #define FUNC_NAME s_scm_unmemoize_expression | |
722 | { | |
723 | SCM_VALIDATE_MEMOIZED (1, m); | |
724 | return unmemoize (m); | |
725 | } | |
726 | #undef FUNC_NAME | |
727 | ||
3149a5b6 AW |
728 | SCM_DEFINE (scm_memoized_expression_typecode, "memoized-expression-typecode", 1, 0, 0, |
729 | (SCM m), | |
730 | "Return the typecode from the memoized expression @var{m}.") | |
731 | #define FUNC_NAME s_scm_memoized_expression_typecode | |
732 | { | |
733 | SCM_VALIDATE_MEMOIZED (1, m); | |
b7ecadca LC |
734 | |
735 | /* The tag is a 16-bit integer so it fits in an inum. */ | |
736 | return SCM_I_MAKINUM (SCM_MEMOIZED_TAG (m)); | |
3149a5b6 AW |
737 | } |
738 | #undef FUNC_NAME | |
739 | ||
740 | SCM_DEFINE (scm_memoized_expression_data, "memoized-expression-data", 1, 0, 0, | |
741 | (SCM m), | |
742 | "Return the data from the memoized expression @var{m}.") | |
743 | #define FUNC_NAME s_scm_memoized_expression_data | |
744 | { | |
745 | SCM_VALIDATE_MEMOIZED (1, m); | |
746 | return SCM_MEMOIZED_ARGS (m); | |
747 | } | |
748 | #undef FUNC_NAME | |
749 | ||
750 | SCM_DEFINE (scm_memoized_typecode, "memoized-typecode", 1, 0, 0, | |
751 | (SCM sym), | |
752 | "Return the memoized typecode corresponding to the symbol @var{sym}.") | |
753 | #define FUNC_NAME s_scm_memoized_typecode | |
754 | { | |
755 | int i; | |
756 | ||
757 | SCM_VALIDATE_SYMBOL (1, sym); | |
758 | ||
759 | for (i = 0; i < sizeof(memoized_tags)/sizeof(const char*); i++) | |
760 | if (strcmp (scm_i_symbol_chars (sym), memoized_tags[i]) == 0) | |
761 | return scm_from_int32 (i); | |
762 | ||
763 | return SCM_BOOL_F; | |
764 | } | |
765 | #undef FUNC_NAME | |
766 | ||
767 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); | |
768 | static void error_unbound_variable (SCM symbol) SCM_NORETURN; | |
769 | static void error_unbound_variable (SCM symbol) | |
770 | { | |
771 | scm_error (scm_unbound_variable_key, NULL, "Unbound variable: ~S", | |
772 | scm_list_1 (symbol), SCM_BOOL_F); | |
773 | } | |
774 | ||
775 | SCM_DEFINE (scm_memoize_variable_access_x, "memoize-variable-access!", 2, 0, 0, | |
776 | (SCM m, SCM mod), | |
777 | "Look up and cache the variable that @var{m} will access, returning the variable.") | |
7230aaf9 | 778 | #define FUNC_NAME s_scm_memoize_variable_access_x |
3149a5b6 AW |
779 | { |
780 | SCM mx; | |
781 | SCM_VALIDATE_MEMOIZED (1, m); | |
782 | mx = SCM_MEMOIZED_ARGS (m); | |
783 | switch (SCM_MEMOIZED_TAG (m)) | |
784 | { | |
785 | case SCM_M_TOPLEVEL_REF: | |
786 | if (SCM_VARIABLEP (mx)) | |
787 | return mx; | |
788 | else | |
789 | { | |
790 | SCM var = scm_module_variable (mod, mx); | |
791 | if (scm_is_false (var) || scm_is_false (scm_variable_bound_p (var))) | |
792 | error_unbound_variable (mx); | |
793 | SCM_SET_SMOB_OBJECT (m, var); | |
794 | return var; | |
795 | } | |
796 | ||
797 | case SCM_M_TOPLEVEL_SET: | |
798 | { | |
799 | SCM var = CAR (mx); | |
800 | if (SCM_VARIABLEP (var)) | |
801 | return var; | |
802 | else | |
803 | { | |
804 | var = scm_module_variable (mod, var); | |
805 | if (scm_is_false (var)) | |
806 | error_unbound_variable (CAR (mx)); | |
807 | SCM_SETCAR (mx, var); | |
808 | return var; | |
809 | } | |
810 | } | |
811 | ||
812 | case SCM_M_MODULE_REF: | |
813 | if (SCM_VARIABLEP (mx)) | |
814 | return mx; | |
815 | else | |
816 | { | |
817 | SCM var; | |
818 | mod = scm_resolve_module (CAR (mx)); | |
819 | if (scm_is_true (CDDR (mx))) | |
820 | mod = scm_module_public_interface (mod); | |
821 | var = scm_module_lookup (mod, CADR (mx)); | |
822 | if (scm_is_false (scm_variable_bound_p (var))) | |
823 | error_unbound_variable (CADR (mx)); | |
824 | SCM_SET_SMOB_OBJECT (m, var); | |
825 | return var; | |
826 | } | |
827 | ||
828 | case SCM_M_MODULE_SET: | |
829 | /* FIXME: not quite threadsafe */ | |
830 | if (SCM_VARIABLEP (CDR (mx))) | |
831 | return CDR (mx); | |
832 | else | |
833 | { | |
834 | SCM var; | |
835 | mod = scm_resolve_module (CADR (mx)); | |
836 | if (scm_is_true (CDDDR (mx))) | |
837 | mod = scm_module_public_interface (mod); | |
838 | var = scm_module_lookup (mod, CADDR (mx)); | |
839 | SCM_SETCDR (mx, var); | |
840 | return var; | |
841 | } | |
842 | ||
843 | default: | |
844 | scm_wrong_type_arg (FUNC_NAME, 1, m); | |
845 | return SCM_BOOL_F; | |
846 | } | |
847 | } | |
848 | #undef FUNC_NAME | |
849 | ||
b7742c6b AW |
850 | |
851 | \f | |
852 | ||
853 | void | |
854 | scm_init_memoize () | |
855 | { | |
856 | scm_tc16_memoized = scm_make_smob_type ("%memoized", 0); | |
b7742c6b AW |
857 | scm_set_smob_print (scm_tc16_memoized, scm_print_memoized); |
858 | ||
859 | #include "libguile/memoize.x" | |
4f692ace | 860 | |
bb97e4ab AW |
861 | wind = scm_c_make_gsubr ("wind", 2, 0, 0, do_wind); |
862 | unwind = scm_c_make_gsubr ("unwind", 0, 0, 0, do_unwind); | |
c32b7c4c AW |
863 | push_fluid = scm_c_make_gsubr ("push-fluid", 2, 0, 0, do_push_fluid); |
864 | pop_fluid = scm_c_make_gsubr ("pop-fluid", 0, 0, 0, do_pop_fluid); | |
bb97e4ab | 865 | |
4a655e50 | 866 | list_of_guile = scm_list_1 (scm_from_latin1_symbol ("guile")); |
b7742c6b AW |
867 | } |
868 | ||
869 | /* | |
870 | Local Variables: | |
871 | c-file-style: "gnu" | |
872 | End: | |
873 | */ |