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 AW |
56 | |
57 | ||
dc3e203e | 58 | SCM_SYMBOL (sym_case_lambda_star, "case-lambda*"); |
b7742c6b AW |
59 | |
60 | \f | |
61 | ||
62 | ||
63 | /* {Evaluator memoized expressions} | |
64 | */ | |
65 | ||
66 | scm_t_bits scm_tc16_memoized; | |
67 | ||
b2b33168 AW |
68 | #define MAKMEMO(n, args) \ |
69 | (scm_cell (scm_tc16_memoized | ((n) << 16), SCM_UNPACK (args))) | |
b7742c6b AW |
70 | |
71 | #define MAKMEMO_BEGIN(exps) \ | |
72 | MAKMEMO (SCM_M_BEGIN, exps) | |
73 | #define MAKMEMO_IF(test, then, else_) \ | |
74 | MAKMEMO (SCM_M_IF, scm_cons (test, scm_cons (then, else_))) | |
8f9c5b58 AW |
75 | #define FIXED_ARITY(nreq) \ |
76 | scm_list_1 (SCM_I_MAKINUM (nreq)) | |
77 | #define REST_ARITY(nreq, rest) \ | |
78 | scm_list_2 (SCM_I_MAKINUM (nreq), rest) | |
9658182d AW |
79 | #define FULL_ARITY(nreq, rest, nopt, kw, inits, alt) \ |
80 | scm_list_n (SCM_I_MAKINUM (nreq), rest, SCM_I_MAKINUM (nopt), kw, inits, \ | |
81 | alt, SCM_UNDEFINED) | |
c438cd71 LC |
82 | #define MAKMEMO_LAMBDA(body, arity, docstring) \ |
83 | MAKMEMO (SCM_M_LAMBDA, \ | |
84 | scm_cons (body, scm_cons (docstring, arity))) | |
b7742c6b AW |
85 | #define MAKMEMO_LET(inits, body) \ |
86 | MAKMEMO (SCM_M_LET, scm_cons (inits, body)) | |
87 | #define MAKMEMO_QUOTE(exp) \ | |
88 | MAKMEMO (SCM_M_QUOTE, exp) | |
89 | #define MAKMEMO_DEFINE(var, val) \ | |
90 | MAKMEMO (SCM_M_DEFINE, scm_cons (var, val)) | |
d69531e2 AW |
91 | #define MAKMEMO_DYNWIND(in, expr, out) \ |
92 | MAKMEMO (SCM_M_DYNWIND, scm_cons (in, scm_cons (expr, out))) | |
bb0229b5 AW |
93 | #define MAKMEMO_WITH_FLUIDS(fluids, vals, expr) \ |
94 | MAKMEMO (SCM_M_WITH_FLUIDS, scm_cons (fluids, scm_cons (vals, expr))) | |
2cd72a84 AW |
95 | #define MAKMEMO_APPLY(proc, args)\ |
96 | MAKMEMO (SCM_M_APPLY, scm_list_2 (proc, args)) | |
b7742c6b AW |
97 | #define MAKMEMO_CONT(proc) \ |
98 | MAKMEMO (SCM_M_CONT, proc) | |
99 | #define MAKMEMO_CALL_WITH_VALUES(prod, cons) \ | |
100 | MAKMEMO (SCM_M_CALL_WITH_VALUES, scm_cons (prod, cons)) | |
9331f91c AW |
101 | #define MAKMEMO_CALL(proc, nargs, args) \ |
102 | MAKMEMO (SCM_M_CALL, scm_cons (proc, scm_cons (SCM_I_MAKINUM (nargs), args))) | |
b7742c6b AW |
103 | #define MAKMEMO_LEX_REF(n) \ |
104 | MAKMEMO (SCM_M_LEXICAL_REF, SCM_I_MAKINUM (n)) | |
105 | #define MAKMEMO_LEX_SET(n, val) \ | |
106 | MAKMEMO (SCM_M_LEXICAL_SET, scm_cons (SCM_I_MAKINUM (n), val)) | |
107 | #define MAKMEMO_TOP_REF(var) \ | |
108 | MAKMEMO (SCM_M_TOPLEVEL_REF, var) | |
109 | #define MAKMEMO_TOP_SET(var, val) \ | |
110 | MAKMEMO (SCM_M_TOPLEVEL_SET, scm_cons (var, val)) | |
111 | #define MAKMEMO_MOD_REF(mod, var, public) \ | |
112 | MAKMEMO (SCM_M_MODULE_REF, scm_cons (mod, scm_cons (var, public))) | |
113 | #define MAKMEMO_MOD_SET(val, mod, var, public) \ | |
114 | MAKMEMO (SCM_M_MODULE_SET, scm_cons (val, scm_cons (mod, scm_cons (var, public)))) | |
747022e4 AW |
115 | #define MAKMEMO_PROMPT(tag, exp, handler) \ |
116 | MAKMEMO (SCM_M_PROMPT, scm_cons (tag, scm_cons (exp, handler))) | |
b7742c6b | 117 | |
2cd72a84 AW |
118 | |
119 | /* Primitives for the evaluator */ | |
120 | scm_t_bits scm_tc16_memoizer; | |
121 | #define SCM_MEMOIZER_P(x) (SCM_SMOB_PREDICATE (scm_tc16_memoizer, (x))) | |
122 | #define SCM_MEMOIZER(M) (SCM_SMOB_OBJECT_1 (M)) | |
123 | ||
b7742c6b AW |
124 | \f |
125 | ||
126 | /* This table must agree with the list of M_ constants in memoize.h */ | |
127 | static const char *const memoized_tags[] = | |
128 | { | |
129 | "begin", | |
130 | "if", | |
131 | "lambda", | |
132 | "let", | |
133 | "quote", | |
134 | "define", | |
d69531e2 | 135 | "dynwind", |
bb0229b5 | 136 | "with-fluids", |
b7742c6b | 137 | "apply", |
3149a5b6 | 138 | "call/cc", |
b7742c6b AW |
139 | "call-with-values", |
140 | "call", | |
141 | "lexical-ref", | |
142 | "lexical-set!", | |
143 | "toplevel-ref", | |
144 | "toplevel-set!", | |
145 | "module-ref", | |
3149a5b6 | 146 | "module-set!", |
747022e4 | 147 | "prompt", |
b7742c6b AW |
148 | }; |
149 | ||
150 | static int | |
151 | scm_print_memoized (SCM memoized, SCM port, scm_print_state *pstate) | |
152 | { | |
153 | scm_puts ("#<memoized ", port); | |
154 | scm_write (scm_unmemoize_expression (memoized), port); | |
155 | scm_puts (">", port); | |
156 | return 1; | |
157 | } | |
158 | ||
b7742c6b | 159 | |
b7742c6b AW |
160 | \f |
161 | ||
162 | ||
b7742c6b | 163 | static int |
dc3e203e | 164 | lookup (SCM x, SCM env) |
b7742c6b AW |
165 | { |
166 | int i = 0; | |
167 | for (; scm_is_pair (env); env = CDR (env), i++) | |
168 | if (scm_is_eq (x, CAR (env))) | |
169 | return i; /* bound */ | |
dc3e203e | 170 | abort (); |
b7742c6b AW |
171 | } |
172 | ||
b7742c6b | 173 | |
dc3e203e AW |
174 | /* Abbreviate SCM_EXPANDED_REF. Copied because I'm not sure about symbol pasting */ |
175 | #define REF(x,type,field) \ | |
176 | (scm_struct_ref (x, SCM_I_MAKINUM (SCM_EXPANDED_##type##_##field))) | |
b7742c6b | 177 | |
dc3e203e | 178 | static SCM list_of_guile = SCM_BOOL_F; |
b7742c6b | 179 | |
dc3e203e | 180 | static SCM memoize (SCM exp, SCM env); |
b7742c6b AW |
181 | |
182 | static SCM | |
dc3e203e | 183 | memoize_exps (SCM exps, SCM env) |
b7742c6b | 184 | { |
dc3e203e AW |
185 | SCM ret; |
186 | for (ret = SCM_EOL; scm_is_pair (exps); exps = CDR (exps)) | |
187 | ret = scm_cons (memoize (CAR (exps), env), ret); | |
188 | return scm_reverse_x (ret, SCM_UNDEFINED); | |
7572ee52 | 189 | } |
7572ee52 | 190 | |
7572ee52 | 191 | static SCM |
dc3e203e | 192 | memoize (SCM exp, SCM env) |
b7742c6b | 193 | { |
dc3e203e AW |
194 | if (!SCM_EXPANDED_P (exp)) |
195 | abort (); | |
b7742c6b | 196 | |
dc3e203e | 197 | switch (SCM_EXPANDED_TYPE (exp)) |
b7742c6b | 198 | { |
dc3e203e AW |
199 | case SCM_EXPANDED_VOID: |
200 | return MAKMEMO_QUOTE (SCM_UNSPECIFIED); | |
201 | ||
202 | case SCM_EXPANDED_CONST: | |
203 | return MAKMEMO_QUOTE (REF (exp, CONST, EXP)); | |
b7742c6b | 204 | |
dc3e203e AW |
205 | case SCM_EXPANDED_PRIMITIVE_REF: |
206 | if (scm_is_eq (scm_current_module (), scm_the_root_module ())) | |
207 | return MAKMEMO_TOP_REF (REF (exp, PRIMITIVE_REF, NAME)); | |
208 | else | |
209 | return MAKMEMO_MOD_REF (list_of_guile, REF (exp, PRIMITIVE_REF, NAME), | |
210 | SCM_BOOL_F); | |
211 | ||
212 | case SCM_EXPANDED_LEXICAL_REF: | |
213 | return MAKMEMO_LEX_REF (lookup (REF (exp, LEXICAL_REF, GENSYM), env)); | |
214 | ||
215 | case SCM_EXPANDED_LEXICAL_SET: | |
216 | return MAKMEMO_LEX_SET (lookup (REF (exp, LEXICAL_SET, GENSYM), env), | |
217 | memoize (REF (exp, LEXICAL_SET, EXP), env)); | |
218 | ||
219 | case SCM_EXPANDED_MODULE_REF: | |
220 | return MAKMEMO_MOD_REF (REF (exp, MODULE_REF, MOD), | |
221 | REF (exp, MODULE_REF, NAME), | |
222 | REF (exp, MODULE_REF, PUBLIC)); | |
223 | ||
224 | case SCM_EXPANDED_MODULE_SET: | |
225 | return MAKMEMO_MOD_SET (memoize (REF (exp, MODULE_SET, EXP), env), | |
226 | REF (exp, MODULE_SET, MOD), | |
227 | REF (exp, MODULE_SET, NAME), | |
228 | REF (exp, MODULE_SET, PUBLIC)); | |
229 | ||
230 | case SCM_EXPANDED_TOPLEVEL_REF: | |
231 | return MAKMEMO_TOP_REF (REF (exp, TOPLEVEL_REF, NAME)); | |
232 | ||
233 | case SCM_EXPANDED_TOPLEVEL_SET: | |
234 | return MAKMEMO_TOP_SET (REF (exp, TOPLEVEL_SET, NAME), | |
235 | memoize (REF (exp, TOPLEVEL_SET, EXP), env)); | |
236 | ||
237 | case SCM_EXPANDED_TOPLEVEL_DEFINE: | |
238 | return MAKMEMO_DEFINE (REF (exp, TOPLEVEL_DEFINE, NAME), | |
239 | memoize (REF (exp, TOPLEVEL_DEFINE, EXP), env)); | |
240 | ||
241 | case SCM_EXPANDED_CONDITIONAL: | |
242 | return MAKMEMO_IF (memoize (REF (exp, CONDITIONAL, TEST), env), | |
243 | memoize (REF (exp, CONDITIONAL, CONSEQUENT), env), | |
244 | memoize (REF (exp, CONDITIONAL, ALTERNATE), env)); | |
245 | ||
246 | case SCM_EXPANDED_APPLICATION: | |
247 | { | |
248 | SCM proc, args; | |
b7742c6b | 249 | |
dc3e203e | 250 | proc = REF (exp, APPLICATION, PROC); |
e1ca9100 | 251 | args = memoize_exps (REF (exp, APPLICATION, ARGS), env); |
b7742c6b | 252 | |
dc3e203e AW |
253 | if (SCM_EXPANDED_TYPE (proc) == SCM_EXPANDED_TOPLEVEL_REF) |
254 | { | |
255 | SCM var = scm_module_variable (scm_current_module (), | |
256 | REF (proc, TOPLEVEL_REF, NAME)); | |
257 | if (SCM_VARIABLEP (var)) | |
258 | { | |
259 | SCM val = SCM_VARIABLE_REF (var); | |
260 | if (SCM_MEMOIZER_P (val)) | |
261 | return scm_apply (SCM_SMOB_OBJECT_1 (val), args, SCM_EOL); | |
262 | } | |
263 | } | |
264 | /* otherwise we all fall down here */ | |
265 | return MAKMEMO_CALL (memoize (proc, env), scm_ilength (args), args); | |
266 | } | |
b7742c6b | 267 | |
dc3e203e AW |
268 | case SCM_EXPANDED_SEQUENCE: |
269 | return MAKMEMO_BEGIN (memoize_exps (REF (exp, SEQUENCE, EXPS), env)); | |
b7742c6b | 270 | |
dc3e203e | 271 | case SCM_EXPANDED_LAMBDA: |
19113f1c | 272 | /* The body will be a lambda-case or #f. */ |
c438cd71 | 273 | { |
19113f1c | 274 | SCM meta, docstring, body, proc; |
c438cd71 LC |
275 | |
276 | meta = REF (exp, LAMBDA, META); | |
277 | docstring = scm_assoc_ref (meta, scm_sym_documentation); | |
278 | ||
19113f1c AW |
279 | body = REF (exp, LAMBDA, BODY); |
280 | if (scm_is_false (body)) | |
281 | /* Give a body to case-lambda with no clauses. */ | |
282 | proc = MAKMEMO_LAMBDA | |
283 | (MAKMEMO_CALL | |
284 | (MAKMEMO_MOD_REF (list_of_guile, | |
285 | scm_from_latin1_symbol ("throw"), | |
286 | SCM_BOOL_F), | |
287 | 5, | |
288 | scm_list_5 (MAKMEMO_QUOTE (scm_args_number_key), | |
289 | MAKMEMO_QUOTE (SCM_BOOL_F), | |
290 | MAKMEMO_QUOTE (scm_from_latin1_string | |
291 | ("Wrong number of arguments")), | |
292 | MAKMEMO_QUOTE (SCM_EOL), | |
293 | MAKMEMO_QUOTE (SCM_BOOL_F))), | |
294 | FIXED_ARITY (0), | |
295 | SCM_BOOL_F /* docstring */); | |
296 | else | |
297 | proc = memoize (body, env); | |
298 | ||
c438cd71 LC |
299 | if (scm_is_string (docstring)) |
300 | { | |
301 | SCM args = SCM_MEMOIZED_ARGS (proc); | |
302 | SCM_SETCAR (SCM_CDR (args), docstring); | |
303 | } | |
304 | ||
305 | return proc; | |
306 | } | |
b7742c6b | 307 | |
dc3e203e AW |
308 | case SCM_EXPANDED_LAMBDA_CASE: |
309 | { | |
310 | SCM req, rest, opt, kw, inits, vars, body, alt; | |
311 | SCM walk, minits, arity, new_env; | |
632ddbf0 | 312 | int nreq, nopt, ntotal; |
dc3e203e AW |
313 | |
314 | req = REF (exp, LAMBDA_CASE, REQ); | |
d61d6686 | 315 | rest = scm_not (scm_not (REF (exp, LAMBDA_CASE, REST))); |
dc3e203e AW |
316 | opt = REF (exp, LAMBDA_CASE, OPT); |
317 | kw = REF (exp, LAMBDA_CASE, KW); | |
318 | inits = REF (exp, LAMBDA_CASE, INITS); | |
319 | vars = REF (exp, LAMBDA_CASE, GENSYMS); | |
320 | body = REF (exp, LAMBDA_CASE, BODY); | |
321 | alt = REF (exp, LAMBDA_CASE, ALTERNATE); | |
322 | ||
323 | nreq = scm_ilength (req); | |
324 | nopt = scm_is_pair (opt) ? scm_ilength (opt) : 0; | |
632ddbf0 | 325 | ntotal = scm_ilength (vars); |
dc3e203e AW |
326 | |
327 | /* The vars are the gensyms, according to the divine plan. But we need | |
328 | to memoize the inits within their appropriate environment, | |
329 | complicating things. */ | |
330 | new_env = env; | |
331 | for (walk = req; scm_is_pair (walk); | |
332 | walk = CDR (walk), vars = CDR (vars)) | |
333 | new_env = scm_cons (CAR (vars), new_env); | |
334 | ||
335 | minits = SCM_EOL; | |
336 | for (walk = opt; scm_is_pair (walk); | |
337 | walk = CDR (walk), vars = CDR (vars), inits = CDR (inits)) | |
338 | { | |
339 | minits = scm_cons (memoize (CAR (inits), new_env), minits); | |
340 | new_env = scm_cons (CAR (vars), new_env); | |
341 | } | |
b7742c6b | 342 | |
dc3e203e AW |
343 | if (scm_is_true (rest)) |
344 | { | |
345 | new_env = scm_cons (CAR (vars), new_env); | |
346 | vars = CDR (vars); | |
347 | } | |
b7742c6b | 348 | |
dc3e203e AW |
349 | for (; scm_is_pair (inits); vars = CDR (vars), inits = CDR (inits)) |
350 | { | |
351 | minits = scm_cons (memoize (CAR (inits), new_env), minits); | |
352 | new_env = scm_cons (CAR (vars), new_env); | |
353 | } | |
354 | if (!scm_is_null (vars)) | |
355 | abort (); | |
b7742c6b | 356 | |
dc3e203e | 357 | minits = scm_reverse_x (minits, SCM_UNDEFINED); |
b7742c6b | 358 | |
632ddbf0 AW |
359 | if (scm_is_true (kw)) |
360 | { | |
361 | /* (aok? (kw name sym) ...) -> (aok? (kw . index) ...) */ | |
362 | SCM aok = CAR (kw), indices = SCM_EOL; | |
363 | for (kw = CDR (kw); scm_is_pair (kw); kw = CDR (kw)) | |
364 | { | |
365 | SCM k; | |
366 | int idx; | |
367 | ||
368 | k = CAR (CAR (kw)); | |
369 | idx = ntotal - 1 - lookup (CADDR (CAR (kw)), new_env); | |
370 | indices = scm_acons (k, SCM_I_MAKINUM (idx), indices); | |
371 | } | |
372 | kw = scm_cons (aok, scm_reverse_x (indices, SCM_UNDEFINED)); | |
373 | } | |
374 | ||
dc3e203e AW |
375 | if (scm_is_false (alt) && scm_is_false (kw) && scm_is_false (opt)) |
376 | { | |
377 | if (scm_is_false (rest)) | |
378 | arity = FIXED_ARITY (nreq); | |
379 | else | |
380 | arity = REST_ARITY (nreq, SCM_BOOL_T); | |
381 | } | |
382 | else if (scm_is_true (alt)) | |
383 | arity = FULL_ARITY (nreq, rest, nopt, kw, minits, | |
384 | SCM_MEMOIZED_ARGS (memoize (alt, env))); | |
385 | else | |
386 | arity = FULL_ARITY (nreq, rest, nopt, kw, minits, SCM_BOOL_F); | |
b7742c6b | 387 | |
c438cd71 LC |
388 | return MAKMEMO_LAMBDA (memoize (body, new_env), arity, |
389 | SCM_BOOL_F /* docstring */); | |
dc3e203e | 390 | } |
b7742c6b | 391 | |
dc3e203e AW |
392 | case SCM_EXPANDED_LET: |
393 | { | |
394 | SCM vars, exps, body, inits, new_env; | |
395 | ||
396 | vars = REF (exp, LET, GENSYMS); | |
397 | exps = REF (exp, LET, VALS); | |
398 | body = REF (exp, LET, BODY); | |
399 | ||
400 | inits = SCM_EOL; | |
401 | new_env = env; | |
402 | for (; scm_is_pair (vars); vars = CDR (vars), exps = CDR (exps)) | |
403 | { | |
404 | new_env = scm_cons (CAR (vars), new_env); | |
405 | inits = scm_cons (memoize (CAR (exps), env), inits); | |
406 | } | |
b7742c6b | 407 | |
dc3e203e AW |
408 | return MAKMEMO_LET (scm_reverse_x (inits, SCM_UNDEFINED), |
409 | memoize (body, new_env)); | |
410 | } | |
b7742c6b | 411 | |
dc3e203e AW |
412 | case SCM_EXPANDED_LETREC: |
413 | { | |
826373a2 AW |
414 | SCM vars, exps, body, undefs, new_env; |
415 | int i, nvars, in_order_p; | |
dc3e203e | 416 | |
f238862e AW |
417 | vars = REF (exp, LETREC, GENSYMS); |
418 | exps = REF (exp, LETREC, VALS); | |
419 | body = REF (exp, LETREC, BODY); | |
826373a2 | 420 | in_order_p = scm_is_true (REF (exp, LETREC, IN_ORDER_P)); |
dc3e203e | 421 | nvars = i = scm_ilength (vars); |
826373a2 | 422 | undefs = SCM_EOL; |
dc3e203e AW |
423 | new_env = env; |
424 | ||
826373a2 | 425 | for (; scm_is_pair (vars); vars = CDR (vars)) |
dc3e203e AW |
426 | { |
427 | new_env = scm_cons (CAR (vars), new_env); | |
428 | undefs = scm_cons (MAKMEMO_QUOTE (SCM_UNDEFINED), undefs); | |
dc3e203e | 429 | } |
b7742c6b | 430 | |
826373a2 AW |
431 | if (in_order_p) |
432 | { | |
433 | SCM body_exps = SCM_EOL; | |
434 | for (; scm_is_pair (exps); exps = CDR (exps), i--) | |
435 | body_exps = scm_cons (MAKMEMO_LEX_SET (i-1, | |
436 | memoize (CAR (exps), new_env)), | |
437 | body_exps); | |
438 | body_exps = scm_cons (memoize (body, new_env), body_exps); | |
439 | body_exps = scm_reverse_x (body_exps, SCM_UNDEFINED); | |
440 | return MAKMEMO_LET (undefs, MAKMEMO_BEGIN (body_exps)); | |
441 | } | |
442 | else | |
443 | { | |
444 | SCM sets = SCM_EOL, inits = SCM_EOL; | |
445 | for (; scm_is_pair (exps); exps = CDR (exps), i--) | |
446 | { | |
447 | sets = scm_cons (MAKMEMO_LEX_SET ((i-1) + nvars, | |
448 | MAKMEMO_LEX_REF (i-1)), | |
449 | sets); | |
450 | inits = scm_cons (memoize (CAR (exps), new_env), inits); | |
451 | } | |
452 | inits = scm_reverse_x (inits, SCM_UNDEFINED); | |
453 | return MAKMEMO_LET | |
454 | (undefs, | |
455 | MAKMEMO_BEGIN (scm_list_2 (MAKMEMO_LET (inits, MAKMEMO_BEGIN (sets)), | |
456 | memoize (body, new_env)))); | |
457 | } | |
dc3e203e | 458 | } |
b7742c6b | 459 | |
dc3e203e AW |
460 | case SCM_EXPANDED_DYNLET: |
461 | return MAKMEMO_WITH_FLUIDS (memoize_exps (REF (exp, DYNLET, FLUIDS), env), | |
462 | memoize_exps (REF (exp, DYNLET, VALS), env), | |
463 | memoize (REF (exp, DYNLET, BODY), env)); | |
b7742c6b | 464 | |
b7742c6b | 465 | default: |
dc3e203e | 466 | abort (); |
b7742c6b AW |
467 | } |
468 | } | |
469 | ||
470 | ||
471 | \f | |
472 | ||
473 | SCM_DEFINE (scm_memoize_expression, "memoize-expression", 1, 0, 0, | |
474 | (SCM exp), | |
475 | "Memoize the expression @var{exp}.") | |
476 | #define FUNC_NAME s_scm_memoize_expression | |
477 | { | |
a310a1d1 | 478 | SCM_ASSERT_TYPE (SCM_EXPANDED_P (exp), exp, 1, FUNC_NAME, "expanded"); |
b7742c6b AW |
479 | return memoize (exp, scm_current_module ()); |
480 | } | |
481 | #undef FUNC_NAME | |
482 | ||
2cd72a84 | 483 | |
b7742c6b AW |
484 | \f |
485 | ||
2cd72a84 AW |
486 | #define SCM_MAKE_MEMOIZER(STR, MEMOIZER, N) \ |
487 | (scm_cell (scm_tc16_memoizer, \ | |
b2b33168 | 488 | SCM_UNPACK (scm_c_make_gsubr (STR, N, 0, 0, MEMOIZER)))) |
2cd72a84 AW |
489 | #define SCM_DEFINE_MEMOIZER(STR, MEMOIZER, N) \ |
490 | SCM_SNARF_INIT(scm_c_define (STR, SCM_MAKE_MEMOIZER (STR, MEMOIZER, N))) | |
491 | ||
efa360af AW |
492 | #define SCM_MAKE_REST_MEMOIZER(STR, MEMOIZER, N) \ |
493 | (scm_cell (scm_tc16_memoizer, \ | |
b2b33168 | 494 | SCM_UNPACK ((scm_c_make_gsubr (STR, N, 0, 1, MEMOIZER))))) |
efa360af AW |
495 | #define SCM_DEFINE_REST_MEMOIZER(STR, MEMOIZER, N) \ |
496 | SCM_SNARF_INIT(scm_c_define (STR, SCM_MAKE_REST_MEMOIZER (STR, MEMOIZER, N))) | |
497 | ||
498 | static SCM m_apply (SCM proc, SCM arg, SCM rest); | |
2cd72a84 AW |
499 | static SCM m_call_cc (SCM proc); |
500 | static SCM m_call_values (SCM prod, SCM cons); | |
501 | static SCM m_dynamic_wind (SCM pre, SCM exp, SCM post); | |
502 | static SCM m_prompt (SCM tag, SCM exp, SCM handler); | |
503 | ||
efa360af | 504 | SCM_DEFINE_REST_MEMOIZER ("@apply", m_apply, 2); |
2cd72a84 AW |
505 | SCM_DEFINE_MEMOIZER ("@call-with-current-continuation", m_call_cc, 1); |
506 | SCM_DEFINE_MEMOIZER ("@call-with-values", m_call_values, 2); | |
507 | SCM_DEFINE_MEMOIZER ("@dynamic-wind", m_dynamic_wind, 3); | |
508 | SCM_DEFINE_MEMOIZER ("@prompt", m_prompt, 3); | |
509 | ||
510 | ||
511 | \f | |
512 | ||
efa360af | 513 | static SCM m_apply (SCM proc, SCM arg, SCM rest) |
2cd72a84 AW |
514 | #define FUNC_NAME "@apply" |
515 | { | |
efa360af AW |
516 | long len; |
517 | ||
2cd72a84 | 518 | SCM_VALIDATE_MEMOIZED (1, proc); |
efa360af AW |
519 | SCM_VALIDATE_MEMOIZED (2, arg); |
520 | len = scm_ilength (rest); | |
521 | if (len < 0) | |
522 | abort (); | |
523 | else if (len == 0) | |
524 | return MAKMEMO_APPLY (proc, arg); | |
525 | else | |
526 | { | |
527 | SCM tail; | |
528 | ||
529 | rest = scm_reverse (rest); | |
530 | tail = scm_car (rest); | |
531 | rest = scm_cdr (rest); | |
532 | len--; | |
533 | ||
534 | while (scm_is_pair (rest)) | |
535 | { | |
4a655e50 AW |
536 | tail = MAKMEMO_CALL (MAKMEMO_MOD_REF (scm_list_1 (scm_from_latin1_symbol ("guile")), |
537 | scm_from_latin1_symbol ("cons"), | |
efa360af AW |
538 | SCM_BOOL_F), |
539 | 2, | |
540 | scm_list_2 (scm_car (rest), tail)); | |
541 | rest = scm_cdr (rest); | |
542 | } | |
543 | return MAKMEMO_APPLY (proc, tail); | |
544 | } | |
2cd72a84 AW |
545 | } |
546 | #undef FUNC_NAME | |
547 | ||
548 | static SCM m_call_cc (SCM proc) | |
549 | #define FUNC_NAME "@call-with-current-continuation" | |
550 | { | |
551 | SCM_VALIDATE_MEMOIZED (1, proc); | |
552 | return MAKMEMO_CONT (proc); | |
553 | } | |
554 | #undef FUNC_NAME | |
555 | ||
556 | static SCM m_call_values (SCM prod, SCM cons) | |
557 | #define FUNC_NAME "@call-with-values" | |
558 | { | |
559 | SCM_VALIDATE_MEMOIZED (1, prod); | |
560 | SCM_VALIDATE_MEMOIZED (2, cons); | |
561 | return MAKMEMO_CALL_WITH_VALUES (prod, cons); | |
562 | } | |
563 | #undef FUNC_NAME | |
564 | ||
565 | static SCM m_dynamic_wind (SCM in, SCM expr, SCM out) | |
566 | #define FUNC_NAME "memoize-dynwind" | |
567 | { | |
568 | SCM_VALIDATE_MEMOIZED (1, in); | |
569 | SCM_VALIDATE_MEMOIZED (2, expr); | |
570 | SCM_VALIDATE_MEMOIZED (3, out); | |
571 | return MAKMEMO_DYNWIND (in, expr, out); | |
572 | } | |
573 | #undef FUNC_NAME | |
574 | ||
575 | static SCM m_prompt (SCM tag, SCM exp, SCM handler) | |
576 | #define FUNC_NAME "@prompt" | |
577 | { | |
578 | SCM_VALIDATE_MEMOIZED (1, tag); | |
579 | SCM_VALIDATE_MEMOIZED (2, exp); | |
580 | SCM_VALIDATE_MEMOIZED (3, handler); | |
581 | return MAKMEMO_PROMPT (tag, exp, handler); | |
582 | } | |
583 | #undef FUNC_NAME | |
584 | ||
2cd72a84 AW |
585 | |
586 | \f | |
b7742c6b AW |
587 | |
588 | SCM_SYMBOL (sym_placeholder, "_"); | |
589 | ||
590 | static SCM unmemoize (SCM expr); | |
591 | ||
592 | static SCM | |
593 | unmemoize_exprs (SCM exprs) | |
594 | { | |
595 | SCM ret, tail; | |
596 | if (scm_is_null (exprs)) | |
597 | return SCM_EOL; | |
598 | ret = scm_list_1 (unmemoize (CAR (exprs))); | |
599 | tail = ret; | |
600 | for (exprs = CDR (exprs); !scm_is_null (exprs); exprs = CDR (exprs)) | |
601 | { | |
602 | SCM_SETCDR (tail, scm_list_1 (unmemoize (CAR (exprs)))); | |
603 | tail = CDR (tail); | |
604 | } | |
605 | return ret; | |
606 | } | |
607 | ||
608 | static SCM | |
609 | unmemoize_bindings (SCM inits) | |
610 | { | |
611 | SCM ret, tail; | |
612 | if (scm_is_null (inits)) | |
613 | return SCM_EOL; | |
614 | ret = scm_list_1 (scm_list_2 (sym_placeholder, unmemoize (CAR (inits)))); | |
615 | tail = ret; | |
616 | for (inits = CDR (inits); !scm_is_null (inits); inits = CDR (inits)) | |
617 | { | |
618 | SCM_SETCDR (tail, scm_list_1 (scm_list_2 (sym_placeholder, | |
619 | unmemoize (CAR (inits))))); | |
620 | tail = CDR (tail); | |
621 | } | |
622 | return ret; | |
623 | } | |
624 | ||
625 | static SCM | |
626 | unmemoize_lexical (SCM n) | |
627 | { | |
628 | char buf[16]; | |
629 | buf[15] = 0; | |
630 | snprintf (buf, 15, "<%u>", scm_to_uint32 (n)); | |
631 | return scm_from_locale_symbol (buf); | |
632 | } | |
633 | ||
634 | static SCM | |
635 | unmemoize (const SCM expr) | |
636 | { | |
637 | SCM args; | |
638 | ||
639 | if (!SCM_MEMOIZED_P (expr)) | |
640 | abort (); | |
641 | ||
642 | args = SCM_MEMOIZED_ARGS (expr); | |
643 | switch (SCM_MEMOIZED_TAG (expr)) | |
644 | { | |
645 | case SCM_M_APPLY: | |
646 | return scm_cons (scm_sym_atapply, unmemoize_exprs (args)); | |
647 | case SCM_M_BEGIN: | |
648 | return scm_cons (scm_sym_begin, unmemoize_exprs (args)); | |
649 | case SCM_M_CALL: | |
9331f91c | 650 | return scm_cons (unmemoize (CAR (args)), unmemoize_exprs (CDDR (args))); |
b7742c6b AW |
651 | case SCM_M_CONT: |
652 | return scm_list_2 (scm_sym_atcall_cc, unmemoize (args)); | |
653 | case SCM_M_CALL_WITH_VALUES: | |
654 | return scm_list_3 (scm_sym_at_call_with_values, | |
655 | unmemoize (CAR (args)), unmemoize (CDR (args))); | |
656 | case SCM_M_DEFINE: | |
657 | return scm_list_3 (scm_sym_define, CAR (args), unmemoize (CDR (args))); | |
d69531e2 AW |
658 | case SCM_M_DYNWIND: |
659 | return scm_list_4 (scm_sym_at_dynamic_wind, | |
660 | unmemoize (CAR (args)), | |
661 | unmemoize (CADR (args)), | |
662 | unmemoize (CDDR (args))); | |
bb0229b5 AW |
663 | case SCM_M_WITH_FLUIDS: |
664 | { | |
665 | SCM binds = SCM_EOL, fluids, vals; | |
666 | for (fluids = CAR (args), vals = CADR (args); scm_is_pair (fluids); | |
667 | fluids = CDR (fluids), vals = CDR (vals)) | |
668 | binds = scm_cons (scm_list_2 (unmemoize (CAR (fluids)), | |
669 | unmemoize (CAR (vals))), | |
670 | binds); | |
671 | return scm_list_3 (scm_sym_with_fluids, | |
672 | scm_reverse_x (binds, SCM_UNDEFINED), | |
673 | unmemoize (CDDR (args))); | |
674 | } | |
b7742c6b AW |
675 | case SCM_M_IF: |
676 | return scm_list_4 (scm_sym_if, unmemoize (scm_car (args)), | |
677 | unmemoize (scm_cadr (args)), unmemoize (scm_cddr (args))); | |
678 | case SCM_M_LAMBDA: | |
c438cd71 LC |
679 | { |
680 | SCM body = CAR (args), spec = CDDR (args); | |
681 | ||
682 | if (scm_is_null (CDR (spec))) | |
683 | return scm_list_3 (scm_sym_lambda, | |
684 | scm_make_list (CAR (spec), sym_placeholder), | |
685 | unmemoize (CAR (args))); | |
686 | else if (scm_is_null (SCM_CDDR (spec))) | |
687 | { | |
688 | SCM formals = scm_make_list (CAR (spec), sym_placeholder); | |
689 | return scm_list_3 (scm_sym_lambda, | |
690 | scm_is_true (CADR (spec)) | |
691 | ? scm_cons_star (sym_placeholder, formals) | |
692 | : formals, | |
693 | unmemoize (CAR (args))); | |
694 | } | |
695 | else | |
696 | { | |
697 | SCM alt, tail; | |
698 | ||
699 | alt = CADDR (CDDDR (spec)); | |
700 | if (scm_is_true (alt)) | |
701 | tail = CDR (unmemoize (alt)); | |
702 | else | |
703 | tail = SCM_EOL; | |
704 | ||
705 | return scm_cons | |
706 | (sym_case_lambda_star, | |
707 | scm_cons (scm_list_2 (scm_list_5 (CAR (spec), | |
708 | CADR (spec), | |
709 | CADDR (spec), | |
710 | CADDDR (spec), | |
711 | unmemoize_exprs (CADR (CDDDR (spec)))), | |
712 | unmemoize (body)), | |
713 | tail)); | |
714 | } | |
715 | } | |
b7742c6b AW |
716 | case SCM_M_LET: |
717 | return scm_list_3 (scm_sym_let, | |
718 | unmemoize_bindings (CAR (args)), | |
719 | unmemoize (CDR (args))); | |
720 | case SCM_M_QUOTE: | |
721 | return scm_list_2 (scm_sym_quote, args); | |
722 | case SCM_M_LEXICAL_REF: | |
723 | return unmemoize_lexical (args); | |
724 | case SCM_M_LEXICAL_SET: | |
725 | return scm_list_3 (scm_sym_set_x, unmemoize_lexical (CAR (args)), | |
726 | unmemoize (CDR (args))); | |
727 | case SCM_M_TOPLEVEL_REF: | |
728 | return args; | |
729 | case SCM_M_TOPLEVEL_SET: | |
730 | return scm_list_3 (scm_sym_set_x, CAR (args), unmemoize (CDR (args))); | |
731 | case SCM_M_MODULE_REF: | |
c08899ff AW |
732 | return SCM_VARIABLEP (args) ? args |
733 | : scm_list_3 (scm_is_true (CDDR (args)) ? scm_sym_at : scm_sym_atat, | |
734 | scm_i_finite_list_copy (CAR (args)), | |
735 | CADR (args)); | |
b7742c6b AW |
736 | case SCM_M_MODULE_SET: |
737 | return scm_list_3 (scm_sym_set_x, | |
c08899ff AW |
738 | SCM_VARIABLEP (CDR (args)) ? CDR (args) |
739 | : scm_list_3 (scm_is_true (CDDDR (args)) | |
740 | ? scm_sym_at : scm_sym_atat, | |
741 | scm_i_finite_list_copy (CADR (args)), | |
742 | CADDR (args)), | |
b7742c6b | 743 | unmemoize (CAR (args))); |
747022e4 AW |
744 | case SCM_M_PROMPT: |
745 | return scm_list_4 (scm_sym_at_prompt, | |
746 | unmemoize (CAR (args)), | |
747 | unmemoize (CADR (args)), | |
748 | unmemoize (CDDR (args))); | |
b7742c6b AW |
749 | default: |
750 | abort (); | |
751 | } | |
752 | } | |
753 | ||
2cd72a84 AW |
754 | |
755 | \f | |
756 | ||
b7742c6b AW |
757 | SCM_DEFINE (scm_memoized_p, "memoized?", 1, 0, 0, |
758 | (SCM obj), | |
759 | "Return @code{#t} if @var{obj} is memoized.") | |
760 | #define FUNC_NAME s_scm_memoized_p | |
761 | { | |
762 | return scm_from_bool (SCM_MEMOIZED_P (obj)); | |
763 | } | |
764 | #undef FUNC_NAME | |
765 | ||
766 | SCM_DEFINE (scm_unmemoize_expression, "unmemoize-expression", 1, 0, 0, | |
767 | (SCM m), | |
768 | "Unmemoize the memoized expression @var{m}.") | |
769 | #define FUNC_NAME s_scm_unmemoize_expression | |
770 | { | |
771 | SCM_VALIDATE_MEMOIZED (1, m); | |
772 | return unmemoize (m); | |
773 | } | |
774 | #undef FUNC_NAME | |
775 | ||
3149a5b6 AW |
776 | SCM_DEFINE (scm_memoized_expression_typecode, "memoized-expression-typecode", 1, 0, 0, |
777 | (SCM m), | |
778 | "Return the typecode from the memoized expression @var{m}.") | |
779 | #define FUNC_NAME s_scm_memoized_expression_typecode | |
780 | { | |
781 | SCM_VALIDATE_MEMOIZED (1, m); | |
b7ecadca LC |
782 | |
783 | /* The tag is a 16-bit integer so it fits in an inum. */ | |
784 | return SCM_I_MAKINUM (SCM_MEMOIZED_TAG (m)); | |
3149a5b6 AW |
785 | } |
786 | #undef FUNC_NAME | |
787 | ||
788 | SCM_DEFINE (scm_memoized_expression_data, "memoized-expression-data", 1, 0, 0, | |
789 | (SCM m), | |
790 | "Return the data from the memoized expression @var{m}.") | |
791 | #define FUNC_NAME s_scm_memoized_expression_data | |
792 | { | |
793 | SCM_VALIDATE_MEMOIZED (1, m); | |
794 | return SCM_MEMOIZED_ARGS (m); | |
795 | } | |
796 | #undef FUNC_NAME | |
797 | ||
798 | SCM_DEFINE (scm_memoized_typecode, "memoized-typecode", 1, 0, 0, | |
799 | (SCM sym), | |
800 | "Return the memoized typecode corresponding to the symbol @var{sym}.") | |
801 | #define FUNC_NAME s_scm_memoized_typecode | |
802 | { | |
803 | int i; | |
804 | ||
805 | SCM_VALIDATE_SYMBOL (1, sym); | |
806 | ||
807 | for (i = 0; i < sizeof(memoized_tags)/sizeof(const char*); i++) | |
808 | if (strcmp (scm_i_symbol_chars (sym), memoized_tags[i]) == 0) | |
809 | return scm_from_int32 (i); | |
810 | ||
811 | return SCM_BOOL_F; | |
812 | } | |
813 | #undef FUNC_NAME | |
814 | ||
815 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); | |
816 | static void error_unbound_variable (SCM symbol) SCM_NORETURN; | |
817 | static void error_unbound_variable (SCM symbol) | |
818 | { | |
819 | scm_error (scm_unbound_variable_key, NULL, "Unbound variable: ~S", | |
820 | scm_list_1 (symbol), SCM_BOOL_F); | |
821 | } | |
822 | ||
823 | SCM_DEFINE (scm_memoize_variable_access_x, "memoize-variable-access!", 2, 0, 0, | |
824 | (SCM m, SCM mod), | |
825 | "Look up and cache the variable that @var{m} will access, returning the variable.") | |
7230aaf9 | 826 | #define FUNC_NAME s_scm_memoize_variable_access_x |
3149a5b6 AW |
827 | { |
828 | SCM mx; | |
829 | SCM_VALIDATE_MEMOIZED (1, m); | |
830 | mx = SCM_MEMOIZED_ARGS (m); | |
831 | switch (SCM_MEMOIZED_TAG (m)) | |
832 | { | |
833 | case SCM_M_TOPLEVEL_REF: | |
834 | if (SCM_VARIABLEP (mx)) | |
835 | return mx; | |
836 | else | |
837 | { | |
838 | SCM var = scm_module_variable (mod, mx); | |
839 | if (scm_is_false (var) || scm_is_false (scm_variable_bound_p (var))) | |
840 | error_unbound_variable (mx); | |
841 | SCM_SET_SMOB_OBJECT (m, var); | |
842 | return var; | |
843 | } | |
844 | ||
845 | case SCM_M_TOPLEVEL_SET: | |
846 | { | |
847 | SCM var = CAR (mx); | |
848 | if (SCM_VARIABLEP (var)) | |
849 | return var; | |
850 | else | |
851 | { | |
852 | var = scm_module_variable (mod, var); | |
853 | if (scm_is_false (var)) | |
854 | error_unbound_variable (CAR (mx)); | |
855 | SCM_SETCAR (mx, var); | |
856 | return var; | |
857 | } | |
858 | } | |
859 | ||
860 | case SCM_M_MODULE_REF: | |
861 | if (SCM_VARIABLEP (mx)) | |
862 | return mx; | |
863 | else | |
864 | { | |
865 | SCM var; | |
866 | mod = scm_resolve_module (CAR (mx)); | |
867 | if (scm_is_true (CDDR (mx))) | |
868 | mod = scm_module_public_interface (mod); | |
869 | var = scm_module_lookup (mod, CADR (mx)); | |
870 | if (scm_is_false (scm_variable_bound_p (var))) | |
871 | error_unbound_variable (CADR (mx)); | |
872 | SCM_SET_SMOB_OBJECT (m, var); | |
873 | return var; | |
874 | } | |
875 | ||
876 | case SCM_M_MODULE_SET: | |
877 | /* FIXME: not quite threadsafe */ | |
878 | if (SCM_VARIABLEP (CDR (mx))) | |
879 | return CDR (mx); | |
880 | else | |
881 | { | |
882 | SCM var; | |
883 | mod = scm_resolve_module (CADR (mx)); | |
884 | if (scm_is_true (CDDDR (mx))) | |
885 | mod = scm_module_public_interface (mod); | |
886 | var = scm_module_lookup (mod, CADDR (mx)); | |
887 | SCM_SETCDR (mx, var); | |
888 | return var; | |
889 | } | |
890 | ||
891 | default: | |
892 | scm_wrong_type_arg (FUNC_NAME, 1, m); | |
893 | return SCM_BOOL_F; | |
894 | } | |
895 | } | |
896 | #undef FUNC_NAME | |
897 | ||
b7742c6b AW |
898 | |
899 | \f | |
900 | ||
901 | void | |
902 | scm_init_memoize () | |
903 | { | |
904 | scm_tc16_memoized = scm_make_smob_type ("%memoized", 0); | |
b7742c6b AW |
905 | scm_set_smob_print (scm_tc16_memoized, scm_print_memoized); |
906 | ||
2cd72a84 AW |
907 | scm_tc16_memoizer = scm_make_smob_type ("memoizer", 0); |
908 | ||
b7742c6b | 909 | #include "libguile/memoize.x" |
4f692ace | 910 | |
4a655e50 | 911 | list_of_guile = scm_list_1 (scm_from_latin1_symbol ("guile")); |
b7742c6b AW |
912 | } |
913 | ||
914 | /* | |
915 | Local Variables: | |
916 | c-file-style: "gnu" | |
917 | End: | |
918 | */ |