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4a655e50 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011 |
b7742c6b AW |
2 | * Free Software Foundation, Inc. |
3 | * | |
4 | * This library is free software; you can redistribute it and/or | |
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. | |
8 | * | |
9 | * This library is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * Lesser General Public License for more details. | |
13 | * | |
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 | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301 USA | |
18 | */ | |
19 | ||
20 | \f | |
21 | ||
22 | #ifdef HAVE_CONFIG_H | |
23 | # include <config.h> | |
24 | #endif | |
25 | ||
b7742c6b | 26 | #include "libguile/__scm.h" |
b7742c6b AW |
27 | #include "libguile/_scm.h" |
28 | #include "libguile/continuations.h" | |
29 | #include "libguile/eq.h" | |
dc3e203e | 30 | #include "libguile/expand.h" |
b7742c6b AW |
31 | #include "libguile/list.h" |
32 | #include "libguile/macros.h" | |
33 | #include "libguile/memoize.h" | |
34 | #include "libguile/modules.h" | |
35 | #include "libguile/srcprop.h" | |
36 | #include "libguile/ports.h" | |
37 | #include "libguile/print.h" | |
38 | #include "libguile/strings.h" | |
39 | #include "libguile/throw.h" | |
40 | #include "libguile/validate.h" | |
41 | ||
42 | ||
43 | \f | |
44 | ||
45 | ||
b7742c6b AW |
46 | #define CAR(x) SCM_CAR(x) |
47 | #define CDR(x) SCM_CDR(x) | |
48 | #define CAAR(x) SCM_CAAR(x) | |
49 | #define CADR(x) SCM_CADR(x) | |
50 | #define CDAR(x) SCM_CDAR(x) | |
51 | #define CDDR(x) SCM_CDDR(x) | |
52 | #define CADDR(x) SCM_CADDR(x) | |
53 | #define CDDDR(x) SCM_CDDDR(x) | |
b7ecadca | 54 | #define CADDDR(x) SCM_CADDDR(x) |
b7742c6b AW |
55 | |
56 | ||
dc3e203e | 57 | SCM_SYMBOL (sym_case_lambda_star, "case-lambda*"); |
b7742c6b AW |
58 | |
59 | \f | |
60 | ||
61 | ||
62 | /* {Evaluator memoized expressions} | |
63 | */ | |
64 | ||
65 | scm_t_bits scm_tc16_memoized; | |
66 | ||
b2b33168 AW |
67 | #define MAKMEMO(n, args) \ |
68 | (scm_cell (scm_tc16_memoized | ((n) << 16), SCM_UNPACK (args))) | |
b7742c6b | 69 | |
6fc3eae4 AW |
70 | #define MAKMEMO_SEQ(head,tail) \ |
71 | MAKMEMO (SCM_M_SEQ, scm_cons (head, tail)) | |
b7742c6b AW |
72 | #define MAKMEMO_IF(test, then, else_) \ |
73 | MAKMEMO (SCM_M_IF, scm_cons (test, scm_cons (then, else_))) | |
8f9c5b58 AW |
74 | #define FIXED_ARITY(nreq) \ |
75 | scm_list_1 (SCM_I_MAKINUM (nreq)) | |
76 | #define REST_ARITY(nreq, rest) \ | |
77 | scm_list_2 (SCM_I_MAKINUM (nreq), rest) | |
9658182d AW |
78 | #define FULL_ARITY(nreq, rest, nopt, kw, inits, alt) \ |
79 | scm_list_n (SCM_I_MAKINUM (nreq), rest, SCM_I_MAKINUM (nopt), kw, inits, \ | |
80 | alt, SCM_UNDEFINED) | |
8f9c5b58 AW |
81 | #define MAKMEMO_LAMBDA(body, arity) \ |
82 | MAKMEMO (SCM_M_LAMBDA, (scm_cons (body, arity))) | |
b7742c6b AW |
83 | #define MAKMEMO_LET(inits, body) \ |
84 | MAKMEMO (SCM_M_LET, scm_cons (inits, body)) | |
85 | #define MAKMEMO_QUOTE(exp) \ | |
86 | MAKMEMO (SCM_M_QUOTE, exp) | |
87 | #define MAKMEMO_DEFINE(var, val) \ | |
88 | MAKMEMO (SCM_M_DEFINE, scm_cons (var, val)) | |
d69531e2 AW |
89 | #define MAKMEMO_DYNWIND(in, expr, out) \ |
90 | MAKMEMO (SCM_M_DYNWIND, scm_cons (in, scm_cons (expr, out))) | |
bb0229b5 AW |
91 | #define MAKMEMO_WITH_FLUIDS(fluids, vals, expr) \ |
92 | MAKMEMO (SCM_M_WITH_FLUIDS, scm_cons (fluids, scm_cons (vals, expr))) | |
2cd72a84 AW |
93 | #define MAKMEMO_APPLY(proc, args)\ |
94 | MAKMEMO (SCM_M_APPLY, scm_list_2 (proc, args)) | |
b7742c6b AW |
95 | #define MAKMEMO_CONT(proc) \ |
96 | MAKMEMO (SCM_M_CONT, proc) | |
97 | #define MAKMEMO_CALL_WITH_VALUES(prod, cons) \ | |
98 | MAKMEMO (SCM_M_CALL_WITH_VALUES, scm_cons (prod, cons)) | |
9331f91c AW |
99 | #define MAKMEMO_CALL(proc, nargs, args) \ |
100 | MAKMEMO (SCM_M_CALL, scm_cons (proc, scm_cons (SCM_I_MAKINUM (nargs), args))) | |
b7742c6b AW |
101 | #define MAKMEMO_LEX_REF(n) \ |
102 | MAKMEMO (SCM_M_LEXICAL_REF, SCM_I_MAKINUM (n)) | |
103 | #define MAKMEMO_LEX_SET(n, val) \ | |
104 | MAKMEMO (SCM_M_LEXICAL_SET, scm_cons (SCM_I_MAKINUM (n), val)) | |
105 | #define MAKMEMO_TOP_REF(var) \ | |
106 | MAKMEMO (SCM_M_TOPLEVEL_REF, var) | |
107 | #define MAKMEMO_TOP_SET(var, val) \ | |
108 | MAKMEMO (SCM_M_TOPLEVEL_SET, scm_cons (var, val)) | |
109 | #define MAKMEMO_MOD_REF(mod, var, public) \ | |
110 | MAKMEMO (SCM_M_MODULE_REF, scm_cons (mod, scm_cons (var, public))) | |
111 | #define MAKMEMO_MOD_SET(val, mod, var, public) \ | |
112 | MAKMEMO (SCM_M_MODULE_SET, scm_cons (val, scm_cons (mod, scm_cons (var, public)))) | |
747022e4 AW |
113 | #define MAKMEMO_PROMPT(tag, exp, handler) \ |
114 | MAKMEMO (SCM_M_PROMPT, scm_cons (tag, scm_cons (exp, handler))) | |
b7742c6b | 115 | |
2cd72a84 AW |
116 | |
117 | /* Primitives for the evaluator */ | |
118 | scm_t_bits scm_tc16_memoizer; | |
119 | #define SCM_MEMOIZER_P(x) (SCM_SMOB_PREDICATE (scm_tc16_memoizer, (x))) | |
120 | #define SCM_MEMOIZER(M) (SCM_SMOB_OBJECT_1 (M)) | |
121 | ||
b7742c6b AW |
122 | \f |
123 | ||
124 | /* This table must agree with the list of M_ constants in memoize.h */ | |
125 | static const char *const memoized_tags[] = | |
126 | { | |
6fc3eae4 | 127 | "seq", |
b7742c6b AW |
128 | "if", |
129 | "lambda", | |
130 | "let", | |
131 | "quote", | |
132 | "define", | |
d69531e2 | 133 | "dynwind", |
bb0229b5 | 134 | "with-fluids", |
b7742c6b | 135 | "apply", |
3149a5b6 | 136 | "call/cc", |
b7742c6b AW |
137 | "call-with-values", |
138 | "call", | |
139 | "lexical-ref", | |
140 | "lexical-set!", | |
141 | "toplevel-ref", | |
142 | "toplevel-set!", | |
143 | "module-ref", | |
3149a5b6 | 144 | "module-set!", |
747022e4 | 145 | "prompt", |
b7742c6b AW |
146 | }; |
147 | ||
148 | static int | |
149 | scm_print_memoized (SCM memoized, SCM port, scm_print_state *pstate) | |
150 | { | |
151 | scm_puts ("#<memoized ", port); | |
152 | scm_write (scm_unmemoize_expression (memoized), port); | |
153 | scm_puts (">", port); | |
154 | return 1; | |
155 | } | |
156 | ||
b7742c6b | 157 | |
b7742c6b AW |
158 | \f |
159 | ||
160 | ||
b7742c6b | 161 | static int |
dc3e203e | 162 | lookup (SCM x, SCM env) |
b7742c6b AW |
163 | { |
164 | int i = 0; | |
165 | for (; scm_is_pair (env); env = CDR (env), i++) | |
166 | if (scm_is_eq (x, CAR (env))) | |
167 | return i; /* bound */ | |
dc3e203e | 168 | abort (); |
b7742c6b AW |
169 | } |
170 | ||
b7742c6b | 171 | |
dc3e203e AW |
172 | /* Abbreviate SCM_EXPANDED_REF. Copied because I'm not sure about symbol pasting */ |
173 | #define REF(x,type,field) \ | |
174 | (scm_struct_ref (x, SCM_I_MAKINUM (SCM_EXPANDED_##type##_##field))) | |
b7742c6b | 175 | |
dc3e203e | 176 | static SCM list_of_guile = SCM_BOOL_F; |
b7742c6b | 177 | |
dc3e203e | 178 | static SCM memoize (SCM exp, SCM env); |
b7742c6b AW |
179 | |
180 | static SCM | |
dc3e203e | 181 | memoize_exps (SCM exps, SCM env) |
b7742c6b | 182 | { |
dc3e203e AW |
183 | SCM ret; |
184 | for (ret = SCM_EOL; scm_is_pair (exps); exps = CDR (exps)) | |
185 | ret = scm_cons (memoize (CAR (exps), env), ret); | |
186 | return scm_reverse_x (ret, SCM_UNDEFINED); | |
7572ee52 | 187 | } |
7572ee52 | 188 | |
7572ee52 | 189 | static SCM |
dc3e203e | 190 | memoize (SCM exp, SCM env) |
b7742c6b | 191 | { |
dc3e203e AW |
192 | if (!SCM_EXPANDED_P (exp)) |
193 | abort (); | |
b7742c6b | 194 | |
dc3e203e | 195 | switch (SCM_EXPANDED_TYPE (exp)) |
b7742c6b | 196 | { |
dc3e203e AW |
197 | case SCM_EXPANDED_VOID: |
198 | return MAKMEMO_QUOTE (SCM_UNSPECIFIED); | |
199 | ||
200 | case SCM_EXPANDED_CONST: | |
201 | return MAKMEMO_QUOTE (REF (exp, CONST, EXP)); | |
b7742c6b | 202 | |
dc3e203e AW |
203 | case SCM_EXPANDED_PRIMITIVE_REF: |
204 | if (scm_is_eq (scm_current_module (), scm_the_root_module ())) | |
205 | return MAKMEMO_TOP_REF (REF (exp, PRIMITIVE_REF, NAME)); | |
206 | else | |
207 | return MAKMEMO_MOD_REF (list_of_guile, REF (exp, PRIMITIVE_REF, NAME), | |
208 | SCM_BOOL_F); | |
209 | ||
210 | case SCM_EXPANDED_LEXICAL_REF: | |
211 | return MAKMEMO_LEX_REF (lookup (REF (exp, LEXICAL_REF, GENSYM), env)); | |
212 | ||
213 | case SCM_EXPANDED_LEXICAL_SET: | |
214 | return MAKMEMO_LEX_SET (lookup (REF (exp, LEXICAL_SET, GENSYM), env), | |
215 | memoize (REF (exp, LEXICAL_SET, EXP), env)); | |
216 | ||
217 | case SCM_EXPANDED_MODULE_REF: | |
218 | return MAKMEMO_MOD_REF (REF (exp, MODULE_REF, MOD), | |
219 | REF (exp, MODULE_REF, NAME), | |
220 | REF (exp, MODULE_REF, PUBLIC)); | |
221 | ||
222 | case SCM_EXPANDED_MODULE_SET: | |
223 | return MAKMEMO_MOD_SET (memoize (REF (exp, MODULE_SET, EXP), env), | |
224 | REF (exp, MODULE_SET, MOD), | |
225 | REF (exp, MODULE_SET, NAME), | |
226 | REF (exp, MODULE_SET, PUBLIC)); | |
227 | ||
228 | case SCM_EXPANDED_TOPLEVEL_REF: | |
229 | return MAKMEMO_TOP_REF (REF (exp, TOPLEVEL_REF, NAME)); | |
230 | ||
231 | case SCM_EXPANDED_TOPLEVEL_SET: | |
232 | return MAKMEMO_TOP_SET (REF (exp, TOPLEVEL_SET, NAME), | |
233 | memoize (REF (exp, TOPLEVEL_SET, EXP), env)); | |
234 | ||
235 | case SCM_EXPANDED_TOPLEVEL_DEFINE: | |
236 | return MAKMEMO_DEFINE (REF (exp, TOPLEVEL_DEFINE, NAME), | |
237 | memoize (REF (exp, TOPLEVEL_DEFINE, EXP), env)); | |
238 | ||
239 | case SCM_EXPANDED_CONDITIONAL: | |
240 | return MAKMEMO_IF (memoize (REF (exp, CONDITIONAL, TEST), env), | |
241 | memoize (REF (exp, CONDITIONAL, CONSEQUENT), env), | |
242 | memoize (REF (exp, CONDITIONAL, ALTERNATE), env)); | |
243 | ||
7081d4f9 | 244 | case SCM_EXPANDED_CALL: |
dc3e203e AW |
245 | { |
246 | SCM proc, args; | |
b7742c6b | 247 | |
7081d4f9 AW |
248 | proc = REF (exp, CALL, PROC); |
249 | args = memoize_exps (REF (exp, CALL, ARGS), env); | |
b7742c6b | 250 | |
dc3e203e AW |
251 | if (SCM_EXPANDED_TYPE (proc) == SCM_EXPANDED_TOPLEVEL_REF) |
252 | { | |
253 | SCM var = scm_module_variable (scm_current_module (), | |
254 | REF (proc, TOPLEVEL_REF, NAME)); | |
255 | if (SCM_VARIABLEP (var)) | |
256 | { | |
257 | SCM val = SCM_VARIABLE_REF (var); | |
258 | if (SCM_MEMOIZER_P (val)) | |
259 | return scm_apply (SCM_SMOB_OBJECT_1 (val), args, SCM_EOL); | |
260 | } | |
261 | } | |
262 | /* otherwise we all fall down here */ | |
263 | return MAKMEMO_CALL (memoize (proc, env), scm_ilength (args), args); | |
264 | } | |
b7742c6b | 265 | |
a881a4ae AW |
266 | case SCM_EXPANDED_PRIMCALL: |
267 | { | |
268 | SCM proc, args; | |
269 | ||
270 | if (scm_is_eq (scm_current_module (), scm_the_root_module ())) | |
271 | proc = MAKMEMO_TOP_REF (REF (exp, PRIMCALL, NAME)); | |
272 | else | |
273 | proc = MAKMEMO_MOD_REF (list_of_guile, REF (exp, PRIMCALL, NAME), | |
274 | SCM_BOOL_F); | |
275 | args = memoize_exps (REF (exp, PRIMCALL, ARGS), env); | |
276 | ||
277 | return MAKMEMO_CALL (proc, scm_ilength (args), args); | |
278 | } | |
279 | ||
6fc3eae4 AW |
280 | case SCM_EXPANDED_SEQ: |
281 | return MAKMEMO_SEQ (memoize (REF (exp, SEQ, HEAD), env), | |
282 | memoize (REF (exp, SEQ, TAIL), env)); | |
b7742c6b | 283 | |
dc3e203e AW |
284 | case SCM_EXPANDED_LAMBDA: |
285 | /* The body will be a lambda-case. */ | |
286 | return memoize (REF (exp, LAMBDA, BODY), env); | |
b7742c6b | 287 | |
dc3e203e AW |
288 | case SCM_EXPANDED_LAMBDA_CASE: |
289 | { | |
290 | SCM req, rest, opt, kw, inits, vars, body, alt; | |
291 | SCM walk, minits, arity, new_env; | |
632ddbf0 | 292 | int nreq, nopt, ntotal; |
dc3e203e AW |
293 | |
294 | req = REF (exp, LAMBDA_CASE, REQ); | |
295 | rest = REF (exp, LAMBDA_CASE, REST); | |
296 | opt = REF (exp, LAMBDA_CASE, OPT); | |
297 | kw = REF (exp, LAMBDA_CASE, KW); | |
298 | inits = REF (exp, LAMBDA_CASE, INITS); | |
299 | vars = REF (exp, LAMBDA_CASE, GENSYMS); | |
300 | body = REF (exp, LAMBDA_CASE, BODY); | |
301 | alt = REF (exp, LAMBDA_CASE, ALTERNATE); | |
302 | ||
303 | nreq = scm_ilength (req); | |
304 | nopt = scm_is_pair (opt) ? scm_ilength (opt) : 0; | |
632ddbf0 | 305 | ntotal = scm_ilength (vars); |
dc3e203e AW |
306 | |
307 | /* The vars are the gensyms, according to the divine plan. But we need | |
308 | to memoize the inits within their appropriate environment, | |
309 | complicating things. */ | |
310 | new_env = env; | |
311 | for (walk = req; scm_is_pair (walk); | |
312 | walk = CDR (walk), vars = CDR (vars)) | |
313 | new_env = scm_cons (CAR (vars), new_env); | |
314 | ||
315 | minits = SCM_EOL; | |
316 | for (walk = opt; scm_is_pair (walk); | |
317 | walk = CDR (walk), vars = CDR (vars), inits = CDR (inits)) | |
318 | { | |
319 | minits = scm_cons (memoize (CAR (inits), new_env), minits); | |
320 | new_env = scm_cons (CAR (vars), new_env); | |
321 | } | |
b7742c6b | 322 | |
dc3e203e AW |
323 | if (scm_is_true (rest)) |
324 | { | |
325 | new_env = scm_cons (CAR (vars), new_env); | |
326 | vars = CDR (vars); | |
327 | } | |
b7742c6b | 328 | |
dc3e203e AW |
329 | for (; scm_is_pair (inits); vars = CDR (vars), inits = CDR (inits)) |
330 | { | |
331 | minits = scm_cons (memoize (CAR (inits), new_env), minits); | |
332 | new_env = scm_cons (CAR (vars), new_env); | |
333 | } | |
334 | if (!scm_is_null (vars)) | |
335 | abort (); | |
b7742c6b | 336 | |
dc3e203e | 337 | minits = scm_reverse_x (minits, SCM_UNDEFINED); |
b7742c6b | 338 | |
632ddbf0 AW |
339 | if (scm_is_true (kw)) |
340 | { | |
341 | /* (aok? (kw name sym) ...) -> (aok? (kw . index) ...) */ | |
342 | SCM aok = CAR (kw), indices = SCM_EOL; | |
343 | for (kw = CDR (kw); scm_is_pair (kw); kw = CDR (kw)) | |
344 | { | |
345 | SCM k; | |
346 | int idx; | |
347 | ||
348 | k = CAR (CAR (kw)); | |
349 | idx = ntotal - 1 - lookup (CADDR (CAR (kw)), new_env); | |
350 | indices = scm_acons (k, SCM_I_MAKINUM (idx), indices); | |
351 | } | |
352 | kw = scm_cons (aok, scm_reverse_x (indices, SCM_UNDEFINED)); | |
353 | } | |
354 | ||
dc3e203e AW |
355 | if (scm_is_false (alt) && scm_is_false (kw) && scm_is_false (opt)) |
356 | { | |
357 | if (scm_is_false (rest)) | |
358 | arity = FIXED_ARITY (nreq); | |
359 | else | |
360 | arity = REST_ARITY (nreq, SCM_BOOL_T); | |
361 | } | |
362 | else if (scm_is_true (alt)) | |
363 | arity = FULL_ARITY (nreq, rest, nopt, kw, minits, | |
364 | SCM_MEMOIZED_ARGS (memoize (alt, env))); | |
365 | else | |
366 | arity = FULL_ARITY (nreq, rest, nopt, kw, minits, SCM_BOOL_F); | |
b7742c6b | 367 | |
dc3e203e AW |
368 | return MAKMEMO_LAMBDA (memoize (body, new_env), arity); |
369 | } | |
b7742c6b | 370 | |
dc3e203e AW |
371 | case SCM_EXPANDED_LET: |
372 | { | |
373 | SCM vars, exps, body, inits, new_env; | |
374 | ||
375 | vars = REF (exp, LET, GENSYMS); | |
376 | exps = REF (exp, LET, VALS); | |
377 | body = REF (exp, LET, BODY); | |
378 | ||
379 | inits = SCM_EOL; | |
380 | new_env = env; | |
381 | for (; scm_is_pair (vars); vars = CDR (vars), exps = CDR (exps)) | |
382 | { | |
383 | new_env = scm_cons (CAR (vars), new_env); | |
384 | inits = scm_cons (memoize (CAR (exps), env), inits); | |
385 | } | |
b7742c6b | 386 | |
dc3e203e AW |
387 | return MAKMEMO_LET (scm_reverse_x (inits, SCM_UNDEFINED), |
388 | memoize (body, new_env)); | |
389 | } | |
b7742c6b | 390 | |
dc3e203e AW |
391 | case SCM_EXPANDED_LETREC: |
392 | { | |
826373a2 AW |
393 | SCM vars, exps, body, undefs, new_env; |
394 | int i, nvars, in_order_p; | |
dc3e203e | 395 | |
f238862e AW |
396 | vars = REF (exp, LETREC, GENSYMS); |
397 | exps = REF (exp, LETREC, VALS); | |
398 | body = REF (exp, LETREC, BODY); | |
826373a2 | 399 | in_order_p = scm_is_true (REF (exp, LETREC, IN_ORDER_P)); |
dc3e203e | 400 | nvars = i = scm_ilength (vars); |
826373a2 | 401 | undefs = SCM_EOL; |
dc3e203e AW |
402 | new_env = env; |
403 | ||
826373a2 | 404 | for (; scm_is_pair (vars); vars = CDR (vars)) |
dc3e203e AW |
405 | { |
406 | new_env = scm_cons (CAR (vars), new_env); | |
407 | undefs = scm_cons (MAKMEMO_QUOTE (SCM_UNDEFINED), undefs); | |
dc3e203e | 408 | } |
b7742c6b | 409 | |
826373a2 AW |
410 | if (in_order_p) |
411 | { | |
6fc3eae4 | 412 | SCM body_exps = SCM_EOL, seq; |
826373a2 AW |
413 | for (; scm_is_pair (exps); exps = CDR (exps), i--) |
414 | body_exps = scm_cons (MAKMEMO_LEX_SET (i-1, | |
415 | memoize (CAR (exps), new_env)), | |
416 | body_exps); | |
6fc3eae4 AW |
417 | |
418 | seq = memoize (body, new_env); | |
419 | for (; scm_is_pair (body_exps); body_exps = CDR (body_exps)) | |
420 | seq = MAKMEMO_SEQ (CAR (body_exps), seq); | |
421 | ||
422 | return MAKMEMO_LET (undefs, seq); | |
826373a2 AW |
423 | } |
424 | else | |
425 | { | |
6fc3eae4 | 426 | SCM sets = SCM_EOL, inits = SCM_EOL, set_seq; |
826373a2 AW |
427 | for (; scm_is_pair (exps); exps = CDR (exps), i--) |
428 | { | |
429 | sets = scm_cons (MAKMEMO_LEX_SET ((i-1) + nvars, | |
430 | MAKMEMO_LEX_REF (i-1)), | |
431 | sets); | |
432 | inits = scm_cons (memoize (CAR (exps), new_env), inits); | |
433 | } | |
434 | inits = scm_reverse_x (inits, SCM_UNDEFINED); | |
6fc3eae4 AW |
435 | |
436 | sets = scm_reverse_x (sets, SCM_UNDEFINED); | |
437 | if (scm_is_null (sets)) | |
438 | return memoize (body, env); | |
439 | ||
440 | for (set_seq = CAR (sets), sets = CDR (sets); scm_is_pair (sets); | |
441 | sets = CDR (sets)) | |
442 | set_seq = MAKMEMO_SEQ (CAR (sets), set_seq); | |
443 | ||
444 | return MAKMEMO_LET (undefs, | |
445 | MAKMEMO_SEQ (MAKMEMO_LET (inits, set_seq), | |
446 | memoize (body, new_env))); | |
826373a2 | 447 | } |
dc3e203e | 448 | } |
b7742c6b | 449 | |
dc3e203e AW |
450 | case SCM_EXPANDED_DYNLET: |
451 | return MAKMEMO_WITH_FLUIDS (memoize_exps (REF (exp, DYNLET, FLUIDS), env), | |
452 | memoize_exps (REF (exp, DYNLET, VALS), env), | |
453 | memoize (REF (exp, DYNLET, BODY), env)); | |
b7742c6b | 454 | |
b7742c6b | 455 | default: |
dc3e203e | 456 | abort (); |
b7742c6b AW |
457 | } |
458 | } | |
459 | ||
460 | ||
461 | \f | |
462 | ||
463 | SCM_DEFINE (scm_memoize_expression, "memoize-expression", 1, 0, 0, | |
464 | (SCM exp), | |
465 | "Memoize the expression @var{exp}.") | |
466 | #define FUNC_NAME s_scm_memoize_expression | |
467 | { | |
a310a1d1 | 468 | SCM_ASSERT_TYPE (SCM_EXPANDED_P (exp), exp, 1, FUNC_NAME, "expanded"); |
b7742c6b AW |
469 | return memoize (exp, scm_current_module ()); |
470 | } | |
471 | #undef FUNC_NAME | |
472 | ||
2cd72a84 | 473 | |
b7742c6b AW |
474 | \f |
475 | ||
2cd72a84 AW |
476 | #define SCM_MAKE_MEMOIZER(STR, MEMOIZER, N) \ |
477 | (scm_cell (scm_tc16_memoizer, \ | |
b2b33168 | 478 | SCM_UNPACK (scm_c_make_gsubr (STR, N, 0, 0, MEMOIZER)))) |
2cd72a84 AW |
479 | #define SCM_DEFINE_MEMOIZER(STR, MEMOIZER, N) \ |
480 | SCM_SNARF_INIT(scm_c_define (STR, SCM_MAKE_MEMOIZER (STR, MEMOIZER, N))) | |
481 | ||
efa360af AW |
482 | #define SCM_MAKE_REST_MEMOIZER(STR, MEMOIZER, N) \ |
483 | (scm_cell (scm_tc16_memoizer, \ | |
b2b33168 | 484 | SCM_UNPACK ((scm_c_make_gsubr (STR, N, 0, 1, MEMOIZER))))) |
efa360af AW |
485 | #define SCM_DEFINE_REST_MEMOIZER(STR, MEMOIZER, N) \ |
486 | SCM_SNARF_INIT(scm_c_define (STR, SCM_MAKE_REST_MEMOIZER (STR, MEMOIZER, N))) | |
487 | ||
488 | static SCM m_apply (SCM proc, SCM arg, SCM rest); | |
2cd72a84 AW |
489 | static SCM m_call_cc (SCM proc); |
490 | static SCM m_call_values (SCM prod, SCM cons); | |
491 | static SCM m_dynamic_wind (SCM pre, SCM exp, SCM post); | |
492 | static SCM m_prompt (SCM tag, SCM exp, SCM handler); | |
493 | ||
efa360af | 494 | SCM_DEFINE_REST_MEMOIZER ("@apply", m_apply, 2); |
2cd72a84 AW |
495 | SCM_DEFINE_MEMOIZER ("@call-with-current-continuation", m_call_cc, 1); |
496 | SCM_DEFINE_MEMOIZER ("@call-with-values", m_call_values, 2); | |
497 | SCM_DEFINE_MEMOIZER ("@dynamic-wind", m_dynamic_wind, 3); | |
498 | SCM_DEFINE_MEMOIZER ("@prompt", m_prompt, 3); | |
499 | ||
500 | ||
501 | \f | |
502 | ||
efa360af | 503 | static SCM m_apply (SCM proc, SCM arg, SCM rest) |
2cd72a84 AW |
504 | #define FUNC_NAME "@apply" |
505 | { | |
efa360af AW |
506 | long len; |
507 | ||
2cd72a84 | 508 | SCM_VALIDATE_MEMOIZED (1, proc); |
efa360af AW |
509 | SCM_VALIDATE_MEMOIZED (2, arg); |
510 | len = scm_ilength (rest); | |
511 | if (len < 0) | |
512 | abort (); | |
513 | else if (len == 0) | |
514 | return MAKMEMO_APPLY (proc, arg); | |
515 | else | |
516 | { | |
517 | SCM tail; | |
518 | ||
519 | rest = scm_reverse (rest); | |
520 | tail = scm_car (rest); | |
521 | rest = scm_cdr (rest); | |
522 | len--; | |
523 | ||
524 | while (scm_is_pair (rest)) | |
525 | { | |
4a655e50 AW |
526 | tail = MAKMEMO_CALL (MAKMEMO_MOD_REF (scm_list_1 (scm_from_latin1_symbol ("guile")), |
527 | scm_from_latin1_symbol ("cons"), | |
efa360af AW |
528 | SCM_BOOL_F), |
529 | 2, | |
530 | scm_list_2 (scm_car (rest), tail)); | |
531 | rest = scm_cdr (rest); | |
532 | } | |
533 | return MAKMEMO_APPLY (proc, tail); | |
534 | } | |
2cd72a84 AW |
535 | } |
536 | #undef FUNC_NAME | |
537 | ||
538 | static SCM m_call_cc (SCM proc) | |
539 | #define FUNC_NAME "@call-with-current-continuation" | |
540 | { | |
541 | SCM_VALIDATE_MEMOIZED (1, proc); | |
542 | return MAKMEMO_CONT (proc); | |
543 | } | |
544 | #undef FUNC_NAME | |
545 | ||
546 | static SCM m_call_values (SCM prod, SCM cons) | |
547 | #define FUNC_NAME "@call-with-values" | |
548 | { | |
549 | SCM_VALIDATE_MEMOIZED (1, prod); | |
550 | SCM_VALIDATE_MEMOIZED (2, cons); | |
551 | return MAKMEMO_CALL_WITH_VALUES (prod, cons); | |
552 | } | |
553 | #undef FUNC_NAME | |
554 | ||
555 | static SCM m_dynamic_wind (SCM in, SCM expr, SCM out) | |
556 | #define FUNC_NAME "memoize-dynwind" | |
557 | { | |
558 | SCM_VALIDATE_MEMOIZED (1, in); | |
559 | SCM_VALIDATE_MEMOIZED (2, expr); | |
560 | SCM_VALIDATE_MEMOIZED (3, out); | |
561 | return MAKMEMO_DYNWIND (in, expr, out); | |
562 | } | |
563 | #undef FUNC_NAME | |
564 | ||
565 | static SCM m_prompt (SCM tag, SCM exp, SCM handler) | |
566 | #define FUNC_NAME "@prompt" | |
567 | { | |
568 | SCM_VALIDATE_MEMOIZED (1, tag); | |
569 | SCM_VALIDATE_MEMOIZED (2, exp); | |
570 | SCM_VALIDATE_MEMOIZED (3, handler); | |
571 | return MAKMEMO_PROMPT (tag, exp, handler); | |
572 | } | |
573 | #undef FUNC_NAME | |
574 | ||
2cd72a84 AW |
575 | |
576 | \f | |
b7742c6b AW |
577 | |
578 | SCM_SYMBOL (sym_placeholder, "_"); | |
579 | ||
580 | static SCM unmemoize (SCM expr); | |
581 | ||
582 | static SCM | |
583 | unmemoize_exprs (SCM exprs) | |
584 | { | |
585 | SCM ret, tail; | |
586 | if (scm_is_null (exprs)) | |
587 | return SCM_EOL; | |
588 | ret = scm_list_1 (unmemoize (CAR (exprs))); | |
589 | tail = ret; | |
590 | for (exprs = CDR (exprs); !scm_is_null (exprs); exprs = CDR (exprs)) | |
591 | { | |
592 | SCM_SETCDR (tail, scm_list_1 (unmemoize (CAR (exprs)))); | |
593 | tail = CDR (tail); | |
594 | } | |
595 | return ret; | |
596 | } | |
597 | ||
598 | static SCM | |
599 | unmemoize_bindings (SCM inits) | |
600 | { | |
601 | SCM ret, tail; | |
602 | if (scm_is_null (inits)) | |
603 | return SCM_EOL; | |
604 | ret = scm_list_1 (scm_list_2 (sym_placeholder, unmemoize (CAR (inits)))); | |
605 | tail = ret; | |
606 | for (inits = CDR (inits); !scm_is_null (inits); inits = CDR (inits)) | |
607 | { | |
608 | SCM_SETCDR (tail, scm_list_1 (scm_list_2 (sym_placeholder, | |
609 | unmemoize (CAR (inits))))); | |
610 | tail = CDR (tail); | |
611 | } | |
612 | return ret; | |
613 | } | |
614 | ||
615 | static SCM | |
616 | unmemoize_lexical (SCM n) | |
617 | { | |
618 | char buf[16]; | |
619 | buf[15] = 0; | |
620 | snprintf (buf, 15, "<%u>", scm_to_uint32 (n)); | |
25d50a05 | 621 | return scm_from_utf8_symbol (buf); |
b7742c6b AW |
622 | } |
623 | ||
624 | static SCM | |
625 | unmemoize (const SCM expr) | |
626 | { | |
627 | SCM args; | |
628 | ||
629 | if (!SCM_MEMOIZED_P (expr)) | |
630 | abort (); | |
631 | ||
632 | args = SCM_MEMOIZED_ARGS (expr); | |
633 | switch (SCM_MEMOIZED_TAG (expr)) | |
634 | { | |
635 | case SCM_M_APPLY: | |
636 | return scm_cons (scm_sym_atapply, unmemoize_exprs (args)); | |
6fc3eae4 AW |
637 | case SCM_M_SEQ: |
638 | return scm_list_3 (scm_sym_begin, unmemoize (CAR (args)), | |
639 | unmemoize (CDR (args))); | |
b7742c6b | 640 | case SCM_M_CALL: |
9331f91c | 641 | return scm_cons (unmemoize (CAR (args)), unmemoize_exprs (CDDR (args))); |
b7742c6b AW |
642 | case SCM_M_CONT: |
643 | return scm_list_2 (scm_sym_atcall_cc, unmemoize (args)); | |
644 | case SCM_M_CALL_WITH_VALUES: | |
645 | return scm_list_3 (scm_sym_at_call_with_values, | |
646 | unmemoize (CAR (args)), unmemoize (CDR (args))); | |
647 | case SCM_M_DEFINE: | |
648 | return scm_list_3 (scm_sym_define, CAR (args), unmemoize (CDR (args))); | |
d69531e2 AW |
649 | case SCM_M_DYNWIND: |
650 | return scm_list_4 (scm_sym_at_dynamic_wind, | |
651 | unmemoize (CAR (args)), | |
652 | unmemoize (CADR (args)), | |
653 | unmemoize (CDDR (args))); | |
bb0229b5 AW |
654 | case SCM_M_WITH_FLUIDS: |
655 | { | |
656 | SCM binds = SCM_EOL, fluids, vals; | |
657 | for (fluids = CAR (args), vals = CADR (args); scm_is_pair (fluids); | |
658 | fluids = CDR (fluids), vals = CDR (vals)) | |
659 | binds = scm_cons (scm_list_2 (unmemoize (CAR (fluids)), | |
660 | unmemoize (CAR (vals))), | |
661 | binds); | |
662 | return scm_list_3 (scm_sym_with_fluids, | |
663 | scm_reverse_x (binds, SCM_UNDEFINED), | |
664 | unmemoize (CDDR (args))); | |
665 | } | |
b7742c6b AW |
666 | case SCM_M_IF: |
667 | return scm_list_4 (scm_sym_if, unmemoize (scm_car (args)), | |
668 | unmemoize (scm_cadr (args)), unmemoize (scm_cddr (args))); | |
669 | case SCM_M_LAMBDA: | |
8f9c5b58 AW |
670 | if (scm_is_null (CDDR (args))) |
671 | return scm_list_3 (scm_sym_lambda, | |
672 | scm_make_list (CADR (args), sym_placeholder), | |
673 | unmemoize (CAR (args))); | |
674 | else if (scm_is_null (CDDDR (args))) | |
675 | { | |
676 | SCM formals = scm_make_list (CADR (args), sym_placeholder); | |
677 | return scm_list_3 (scm_sym_lambda, | |
678 | scm_is_true (CADDR (args)) | |
679 | ? scm_cons_star (sym_placeholder, formals) | |
680 | : formals, | |
681 | unmemoize (CAR (args))); | |
682 | } | |
683 | else | |
9658182d | 684 | { |
7572ee52 | 685 | SCM body = CAR (args), spec = CDR (args), alt, tail; |
9658182d AW |
686 | |
687 | alt = CADDR (CDDDR (spec)); | |
688 | if (scm_is_true (alt)) | |
7572ee52 AW |
689 | tail = CDR (unmemoize (alt)); |
690 | else | |
691 | tail = SCM_EOL; | |
9658182d | 692 | |
7572ee52 AW |
693 | return scm_cons |
694 | (sym_case_lambda_star, | |
695 | scm_cons (scm_list_2 (scm_list_5 (CAR (spec), | |
696 | CADR (spec), | |
697 | CADDR (spec), | |
698 | CADDDR (spec), | |
699 | unmemoize_exprs (CADR (CDDDR (spec)))), | |
700 | unmemoize (body)), | |
701 | tail)); | |
9658182d | 702 | } |
b7742c6b AW |
703 | case SCM_M_LET: |
704 | return scm_list_3 (scm_sym_let, | |
705 | unmemoize_bindings (CAR (args)), | |
706 | unmemoize (CDR (args))); | |
707 | case SCM_M_QUOTE: | |
708 | return scm_list_2 (scm_sym_quote, args); | |
709 | case SCM_M_LEXICAL_REF: | |
710 | return unmemoize_lexical (args); | |
711 | case SCM_M_LEXICAL_SET: | |
712 | return scm_list_3 (scm_sym_set_x, unmemoize_lexical (CAR (args)), | |
713 | unmemoize (CDR (args))); | |
714 | case SCM_M_TOPLEVEL_REF: | |
715 | return args; | |
716 | case SCM_M_TOPLEVEL_SET: | |
717 | return scm_list_3 (scm_sym_set_x, CAR (args), unmemoize (CDR (args))); | |
718 | case SCM_M_MODULE_REF: | |
c08899ff AW |
719 | return SCM_VARIABLEP (args) ? args |
720 | : scm_list_3 (scm_is_true (CDDR (args)) ? scm_sym_at : scm_sym_atat, | |
721 | scm_i_finite_list_copy (CAR (args)), | |
722 | CADR (args)); | |
b7742c6b AW |
723 | case SCM_M_MODULE_SET: |
724 | return scm_list_3 (scm_sym_set_x, | |
c08899ff AW |
725 | SCM_VARIABLEP (CDR (args)) ? CDR (args) |
726 | : scm_list_3 (scm_is_true (CDDDR (args)) | |
727 | ? scm_sym_at : scm_sym_atat, | |
728 | scm_i_finite_list_copy (CADR (args)), | |
729 | CADDR (args)), | |
b7742c6b | 730 | unmemoize (CAR (args))); |
747022e4 AW |
731 | case SCM_M_PROMPT: |
732 | return scm_list_4 (scm_sym_at_prompt, | |
733 | unmemoize (CAR (args)), | |
734 | unmemoize (CADR (args)), | |
735 | unmemoize (CDDR (args))); | |
b7742c6b AW |
736 | default: |
737 | abort (); | |
738 | } | |
739 | } | |
740 | ||
2cd72a84 AW |
741 | |
742 | \f | |
743 | ||
b7742c6b AW |
744 | SCM_DEFINE (scm_memoized_p, "memoized?", 1, 0, 0, |
745 | (SCM obj), | |
746 | "Return @code{#t} if @var{obj} is memoized.") | |
747 | #define FUNC_NAME s_scm_memoized_p | |
748 | { | |
749 | return scm_from_bool (SCM_MEMOIZED_P (obj)); | |
750 | } | |
751 | #undef FUNC_NAME | |
752 | ||
753 | SCM_DEFINE (scm_unmemoize_expression, "unmemoize-expression", 1, 0, 0, | |
754 | (SCM m), | |
755 | "Unmemoize the memoized expression @var{m}.") | |
756 | #define FUNC_NAME s_scm_unmemoize_expression | |
757 | { | |
758 | SCM_VALIDATE_MEMOIZED (1, m); | |
759 | return unmemoize (m); | |
760 | } | |
761 | #undef FUNC_NAME | |
762 | ||
3149a5b6 AW |
763 | SCM_DEFINE (scm_memoized_expression_typecode, "memoized-expression-typecode", 1, 0, 0, |
764 | (SCM m), | |
765 | "Return the typecode from the memoized expression @var{m}.") | |
766 | #define FUNC_NAME s_scm_memoized_expression_typecode | |
767 | { | |
768 | SCM_VALIDATE_MEMOIZED (1, m); | |
b7ecadca LC |
769 | |
770 | /* The tag is a 16-bit integer so it fits in an inum. */ | |
771 | return SCM_I_MAKINUM (SCM_MEMOIZED_TAG (m)); | |
3149a5b6 AW |
772 | } |
773 | #undef FUNC_NAME | |
774 | ||
775 | SCM_DEFINE (scm_memoized_expression_data, "memoized-expression-data", 1, 0, 0, | |
776 | (SCM m), | |
777 | "Return the data from the memoized expression @var{m}.") | |
778 | #define FUNC_NAME s_scm_memoized_expression_data | |
779 | { | |
780 | SCM_VALIDATE_MEMOIZED (1, m); | |
781 | return SCM_MEMOIZED_ARGS (m); | |
782 | } | |
783 | #undef FUNC_NAME | |
784 | ||
785 | SCM_DEFINE (scm_memoized_typecode, "memoized-typecode", 1, 0, 0, | |
786 | (SCM sym), | |
787 | "Return the memoized typecode corresponding to the symbol @var{sym}.") | |
788 | #define FUNC_NAME s_scm_memoized_typecode | |
789 | { | |
790 | int i; | |
791 | ||
792 | SCM_VALIDATE_SYMBOL (1, sym); | |
793 | ||
794 | for (i = 0; i < sizeof(memoized_tags)/sizeof(const char*); i++) | |
795 | if (strcmp (scm_i_symbol_chars (sym), memoized_tags[i]) == 0) | |
796 | return scm_from_int32 (i); | |
797 | ||
798 | return SCM_BOOL_F; | |
799 | } | |
800 | #undef FUNC_NAME | |
801 | ||
802 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); | |
803 | static void error_unbound_variable (SCM symbol) SCM_NORETURN; | |
804 | static void error_unbound_variable (SCM symbol) | |
805 | { | |
806 | scm_error (scm_unbound_variable_key, NULL, "Unbound variable: ~S", | |
807 | scm_list_1 (symbol), SCM_BOOL_F); | |
808 | } | |
809 | ||
810 | SCM_DEFINE (scm_memoize_variable_access_x, "memoize-variable-access!", 2, 0, 0, | |
811 | (SCM m, SCM mod), | |
812 | "Look up and cache the variable that @var{m} will access, returning the variable.") | |
7230aaf9 | 813 | #define FUNC_NAME s_scm_memoize_variable_access_x |
3149a5b6 AW |
814 | { |
815 | SCM mx; | |
816 | SCM_VALIDATE_MEMOIZED (1, m); | |
817 | mx = SCM_MEMOIZED_ARGS (m); | |
818 | switch (SCM_MEMOIZED_TAG (m)) | |
819 | { | |
820 | case SCM_M_TOPLEVEL_REF: | |
821 | if (SCM_VARIABLEP (mx)) | |
822 | return mx; | |
823 | else | |
824 | { | |
825 | SCM var = scm_module_variable (mod, mx); | |
826 | if (scm_is_false (var) || scm_is_false (scm_variable_bound_p (var))) | |
827 | error_unbound_variable (mx); | |
828 | SCM_SET_SMOB_OBJECT (m, var); | |
829 | return var; | |
830 | } | |
831 | ||
832 | case SCM_M_TOPLEVEL_SET: | |
833 | { | |
834 | SCM var = CAR (mx); | |
835 | if (SCM_VARIABLEP (var)) | |
836 | return var; | |
837 | else | |
838 | { | |
839 | var = scm_module_variable (mod, var); | |
840 | if (scm_is_false (var)) | |
841 | error_unbound_variable (CAR (mx)); | |
842 | SCM_SETCAR (mx, var); | |
843 | return var; | |
844 | } | |
845 | } | |
846 | ||
847 | case SCM_M_MODULE_REF: | |
848 | if (SCM_VARIABLEP (mx)) | |
849 | return mx; | |
850 | else | |
851 | { | |
852 | SCM var; | |
853 | mod = scm_resolve_module (CAR (mx)); | |
854 | if (scm_is_true (CDDR (mx))) | |
855 | mod = scm_module_public_interface (mod); | |
856 | var = scm_module_lookup (mod, CADR (mx)); | |
857 | if (scm_is_false (scm_variable_bound_p (var))) | |
858 | error_unbound_variable (CADR (mx)); | |
859 | SCM_SET_SMOB_OBJECT (m, var); | |
860 | return var; | |
861 | } | |
862 | ||
863 | case SCM_M_MODULE_SET: | |
864 | /* FIXME: not quite threadsafe */ | |
865 | if (SCM_VARIABLEP (CDR (mx))) | |
866 | return CDR (mx); | |
867 | else | |
868 | { | |
869 | SCM var; | |
870 | mod = scm_resolve_module (CADR (mx)); | |
871 | if (scm_is_true (CDDDR (mx))) | |
872 | mod = scm_module_public_interface (mod); | |
873 | var = scm_module_lookup (mod, CADDR (mx)); | |
874 | SCM_SETCDR (mx, var); | |
875 | return var; | |
876 | } | |
877 | ||
878 | default: | |
879 | scm_wrong_type_arg (FUNC_NAME, 1, m); | |
880 | return SCM_BOOL_F; | |
881 | } | |
882 | } | |
883 | #undef FUNC_NAME | |
884 | ||
b7742c6b AW |
885 | |
886 | \f | |
887 | ||
888 | void | |
889 | scm_init_memoize () | |
890 | { | |
891 | scm_tc16_memoized = scm_make_smob_type ("%memoized", 0); | |
892 | scm_set_smob_mark (scm_tc16_memoized, scm_markcdr); | |
893 | scm_set_smob_print (scm_tc16_memoized, scm_print_memoized); | |
894 | ||
2cd72a84 AW |
895 | scm_tc16_memoizer = scm_make_smob_type ("memoizer", 0); |
896 | ||
b7742c6b | 897 | #include "libguile/memoize.x" |
4f692ace | 898 | |
4a655e50 | 899 | list_of_guile = scm_list_1 (scm_from_latin1_symbol ("guile")); |
b7742c6b AW |
900 | } |
901 | ||
902 | /* | |
903 | Local Variables: | |
904 | c-file-style: "gnu" | |
905 | End: | |
906 | */ |