Commit | Line | Data |
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c438cd71 | 1 | /* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
eb037656 | 2 | * 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 |
c438cd71 LC |
3 | * Free Software Foundation, Inc. |
4 | * | |
b7742c6b AW |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public License | |
7 | * as published by the Free Software Foundation; either version 3 of | |
8 | * the License, or (at your option) any later version. | |
9 | * | |
10 | * This library is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * Lesser General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU Lesser General Public | |
16 | * License along with this library; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
18 | * 02110-1301 USA | |
19 | */ | |
20 | ||
21 | \f | |
22 | ||
23 | #ifdef HAVE_CONFIG_H | |
24 | # include <config.h> | |
25 | #endif | |
26 | ||
b7742c6b | 27 | #include "libguile/__scm.h" |
b7742c6b AW |
28 | #include "libguile/_scm.h" |
29 | #include "libguile/continuations.h" | |
30 | #include "libguile/eq.h" | |
dc3e203e | 31 | #include "libguile/expand.h" |
b7742c6b AW |
32 | #include "libguile/list.h" |
33 | #include "libguile/macros.h" | |
34 | #include "libguile/memoize.h" | |
35 | #include "libguile/modules.h" | |
36 | #include "libguile/srcprop.h" | |
37 | #include "libguile/ports.h" | |
38 | #include "libguile/print.h" | |
39 | #include "libguile/strings.h" | |
40 | #include "libguile/throw.h" | |
41 | #include "libguile/validate.h" | |
42 | ||
43 | ||
44 | \f | |
45 | ||
46 | ||
b7742c6b AW |
47 | #define CAR(x) SCM_CAR(x) |
48 | #define CDR(x) SCM_CDR(x) | |
49 | #define CAAR(x) SCM_CAAR(x) | |
50 | #define CADR(x) SCM_CADR(x) | |
51 | #define CDAR(x) SCM_CDAR(x) | |
52 | #define CDDR(x) SCM_CDDR(x) | |
53 | #define CADDR(x) SCM_CADDR(x) | |
54 | #define CDDDR(x) SCM_CDDDR(x) | |
b7ecadca | 55 | #define CADDDR(x) SCM_CADDDR(x) |
b7742c6b | 56 | |
cfc28c80 AW |
57 | #define VECTOR_REF(v, i) (SCM_SIMPLE_VECTOR_REF (v, i)) |
58 | #define VECTOR_SET(v, i, x) (SCM_SIMPLE_VECTOR_SET (v, i, x)) | |
59 | #define VECTOR_LENGTH(v) (SCM_SIMPLE_VECTOR_LENGTH (v)) | |
b7742c6b | 60 | |
dc3e203e | 61 | SCM_SYMBOL (sym_case_lambda_star, "case-lambda*"); |
b7742c6b AW |
62 | |
63 | \f | |
64 | ||
65 | ||
bb97e4ab AW |
66 | /* Primitives not exposed to general Scheme. */ |
67 | static SCM wind; | |
68 | static SCM unwind; | |
c32b7c4c AW |
69 | static SCM push_fluid; |
70 | static SCM pop_fluid; | |
bb97e4ab AW |
71 | |
72 | static SCM | |
73 | do_wind (SCM in, SCM out) | |
74 | { | |
75 | scm_dynstack_push_dynwind (&SCM_I_CURRENT_THREAD->dynstack, in, out); | |
76 | return SCM_UNSPECIFIED; | |
77 | } | |
78 | ||
79 | static SCM | |
80 | do_unwind (void) | |
81 | { | |
82 | scm_dynstack_pop (&SCM_I_CURRENT_THREAD->dynstack); | |
83 | return SCM_UNSPECIFIED; | |
84 | } | |
85 | ||
c32b7c4c AW |
86 | static SCM |
87 | do_push_fluid (SCM fluid, SCM val) | |
88 | { | |
89 | scm_i_thread *thread = SCM_I_CURRENT_THREAD; | |
98eaef1b AW |
90 | scm_dynstack_push_fluid (&thread->dynstack, fluid, val, |
91 | thread->dynamic_state); | |
c32b7c4c AW |
92 | return SCM_UNSPECIFIED; |
93 | } | |
94 | ||
95 | static SCM | |
96 | do_pop_fluid (void) | |
97 | { | |
98 | scm_i_thread *thread = SCM_I_CURRENT_THREAD; | |
98eaef1b | 99 | scm_dynstack_unwind_fluid (&thread->dynstack, thread->dynamic_state); |
c32b7c4c AW |
100 | return SCM_UNSPECIFIED; |
101 | } | |
102 | ||
bb97e4ab AW |
103 | |
104 | \f | |
105 | ||
b7742c6b AW |
106 | /* {Evaluator memoized expressions} |
107 | */ | |
108 | ||
109 | scm_t_bits scm_tc16_memoized; | |
110 | ||
b2b33168 | 111 | #define MAKMEMO(n, args) \ |
0720f70e | 112 | (scm_cons (SCM_I_MAKINUM (n), args)) |
b7742c6b | 113 | |
6fc3eae4 AW |
114 | #define MAKMEMO_SEQ(head,tail) \ |
115 | MAKMEMO (SCM_M_SEQ, scm_cons (head, tail)) | |
b7742c6b AW |
116 | #define MAKMEMO_IF(test, then, else_) \ |
117 | MAKMEMO (SCM_M_IF, scm_cons (test, scm_cons (then, else_))) | |
8f9c5b58 AW |
118 | #define FIXED_ARITY(nreq) \ |
119 | scm_list_1 (SCM_I_MAKINUM (nreq)) | |
120 | #define REST_ARITY(nreq, rest) \ | |
121 | scm_list_2 (SCM_I_MAKINUM (nreq), rest) | |
cfdc8416 AW |
122 | #define FULL_ARITY(nreq, rest, nopt, kw, ninits, unbound, alt) \ |
123 | scm_list_n (SCM_I_MAKINUM (nreq), rest, SCM_I_MAKINUM (nopt), kw, \ | |
124 | SCM_I_MAKINUM (ninits), unbound, 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))) |
a3cae847 AW |
128 | #define MAKMEMO_CAPTURE_ENV(vars, body) \ |
129 | MAKMEMO (SCM_M_CAPTURE_ENV, scm_cons (vars, body)) | |
b7742c6b AW |
130 | #define MAKMEMO_LET(inits, body) \ |
131 | MAKMEMO (SCM_M_LET, scm_cons (inits, body)) | |
132 | #define MAKMEMO_QUOTE(exp) \ | |
133 | MAKMEMO (SCM_M_QUOTE, exp) | |
ef47c422 AW |
134 | #define MAKMEMO_CAPTURE_MODULE(exp) \ |
135 | MAKMEMO (SCM_M_CAPTURE_MODULE, exp) | |
2cd72a84 AW |
136 | #define MAKMEMO_APPLY(proc, args)\ |
137 | MAKMEMO (SCM_M_APPLY, scm_list_2 (proc, args)) | |
b7742c6b AW |
138 | #define MAKMEMO_CONT(proc) \ |
139 | MAKMEMO (SCM_M_CONT, proc) | |
140 | #define MAKMEMO_CALL_WITH_VALUES(prod, cons) \ | |
141 | MAKMEMO (SCM_M_CALL_WITH_VALUES, scm_cons (prod, cons)) | |
eb037656 AW |
142 | #define MAKMEMO_CALL(proc, args) \ |
143 | MAKMEMO (SCM_M_CALL, scm_cons (proc, args)) | |
cfc28c80 AW |
144 | #define MAKMEMO_LEX_REF(pos) \ |
145 | MAKMEMO (SCM_M_LEXICAL_REF, pos) | |
146 | #define MAKMEMO_LEX_SET(pos, val) \ | |
147 | MAKMEMO (SCM_M_LEXICAL_SET, scm_cons (pos, val)) | |
e6a42e67 AW |
148 | #define MAKMEMO_BOX_REF(box) \ |
149 | MAKMEMO (SCM_M_BOX_REF, box) | |
150 | #define MAKMEMO_BOX_SET(box, val) \ | |
151 | MAKMEMO (SCM_M_BOX_SET, scm_cons (box, val)) | |
152 | #define MAKMEMO_TOP_BOX(mode, var) \ | |
153 | MAKMEMO (SCM_M_RESOLVE, scm_cons (SCM_I_MAKINUM (mode), var)) | |
154 | #define MAKMEMO_MOD_BOX(mode, mod, var, public) \ | |
155 | MAKMEMO (SCM_M_RESOLVE, \ | |
156 | scm_cons (SCM_I_MAKINUM (mode), \ | |
157 | scm_cons (mod, scm_cons (var, public)))) | |
1773bc7d AW |
158 | #define MAKMEMO_CALL_WITH_PROMPT(tag, thunk, handler) \ |
159 | MAKMEMO (SCM_M_CALL_WITH_PROMPT, scm_cons (tag, scm_cons (thunk, handler))) | |
b7742c6b | 160 | |
2cd72a84 | 161 | |
b7742c6b AW |
162 | \f |
163 | ||
164 | /* This table must agree with the list of M_ constants in memoize.h */ | |
165 | static const char *const memoized_tags[] = | |
166 | { | |
6fc3eae4 | 167 | "seq", |
b7742c6b AW |
168 | "if", |
169 | "lambda", | |
99fb07e1 | 170 | "capture-env", |
b7742c6b AW |
171 | "let", |
172 | "quote", | |
ef47c422 | 173 | "capture-module", |
b7742c6b | 174 | "apply", |
3149a5b6 | 175 | "call/cc", |
b7742c6b AW |
176 | "call-with-values", |
177 | "call", | |
178 | "lexical-ref", | |
179 | "lexical-set!", | |
e6a42e67 AW |
180 | "box-ref", |
181 | "box-set!", | |
182 | "resolve", | |
1773bc7d | 183 | "call-with-prompt", |
b7742c6b AW |
184 | }; |
185 | ||
b7742c6b | 186 | |
b7742c6b AW |
187 | \f |
188 | ||
189 | ||
a3cae847 AW |
190 | /* Memoization-time environments mirror the structure of eval-time |
191 | environments. Each link in the chain at memoization-time corresponds | |
192 | to a link at eval-time. | |
193 | ||
194 | env := module | (link, env) | |
195 | module := #f | #t | |
196 | link := flat-link . nested-link | |
197 | flat-link := (#t . ((var . pos) ...)) | |
198 | nested-link := (#f . #(var ...)) | |
199 | ||
200 | A module of #f indicates that the current module has not yet been | |
201 | captured. Memoizing a capture-module expression will capture the | |
202 | module. | |
203 | ||
204 | Flat environments copy the values for a set of free variables into a | |
205 | flat environment, via the capture-env expression. During memoization | |
206 | a flat link collects the values of free variables, along with their | |
207 | resolved outer locations. We are able to copy values because the | |
208 | incoming expression has already been assignment-converted. Flat | |
209 | environments prevent closures from hanging on to too much memory. | |
210 | ||
211 | Nested environments have a rib of "let" bindings, and link to an | |
212 | outer environment. | |
213 | */ | |
214 | ||
b7742c6b | 215 | static int |
cfc28c80 AW |
216 | try_lookup_rib (SCM x, SCM rib) |
217 | { | |
218 | int idx = 0; | |
219 | for (; idx < VECTOR_LENGTH (rib); idx++) | |
220 | if (scm_is_eq (x, VECTOR_REF (rib, idx))) | |
221 | return idx; /* bound */ | |
222 | return -1; | |
223 | } | |
224 | ||
225 | static int | |
226 | lookup_rib (SCM x, SCM rib) | |
227 | { | |
228 | int idx = try_lookup_rib (x, rib); | |
229 | if (idx < 0) | |
230 | abort (); | |
231 | return idx; | |
232 | } | |
233 | ||
234 | static SCM | |
235 | make_pos (int depth, int width) | |
236 | { | |
237 | return scm_cons (SCM_I_MAKINUM (depth), SCM_I_MAKINUM (width)); | |
238 | } | |
239 | ||
a3cae847 AW |
240 | static SCM |
241 | push_nested_link (SCM vars, SCM env) | |
242 | { | |
243 | return scm_acons (SCM_BOOL_F, vars, env); | |
244 | } | |
245 | ||
246 | static SCM | |
247 | push_flat_link (SCM env) | |
248 | { | |
249 | return scm_acons (SCM_BOOL_T, SCM_EOL, env); | |
250 | } | |
251 | ||
252 | static int | |
253 | env_link_is_flat (SCM env_link) | |
254 | { | |
255 | return scm_is_true (CAR (env_link)); | |
256 | } | |
257 | ||
258 | static SCM | |
259 | env_link_vars (SCM env_link) | |
260 | { | |
261 | return CDR (env_link); | |
262 | } | |
263 | ||
264 | static void | |
265 | env_link_add_flat_var (SCM env_link, SCM var, SCM pos) | |
266 | { | |
267 | SCM vars = env_link_vars (env_link); | |
268 | if (scm_is_false (scm_assq (var, vars))) | |
269 | scm_set_cdr_x (env_link, scm_acons (var, pos, vars)); | |
270 | } | |
271 | ||
cfc28c80 | 272 | static SCM |
dc3e203e | 273 | lookup (SCM x, SCM env) |
b7742c6b | 274 | { |
cfc28c80 AW |
275 | int d = 0; |
276 | for (; scm_is_pair (env); env = CDR (env), d++) | |
277 | { | |
a3cae847 AW |
278 | SCM link = CAR (env); |
279 | if (env_link_is_flat (link)) | |
280 | { | |
281 | int w; | |
282 | SCM vars; | |
283 | ||
284 | for (vars = env_link_vars (link), w = scm_ilength (vars) - 1; | |
285 | scm_is_pair (vars); | |
286 | vars = CDR (vars), w--) | |
287 | if (scm_is_eq (x, (CAAR (vars)))) | |
288 | return make_pos (d, w); | |
289 | ||
290 | env_link_add_flat_var (link, x, lookup (x, CDR (env))); | |
291 | return make_pos (d, scm_ilength (env_link_vars (link)) - 1); | |
292 | } | |
293 | else | |
294 | { | |
295 | int w = try_lookup_rib (x, env_link_vars (link)); | |
296 | if (w < 0) | |
297 | continue; | |
298 | return make_pos (d, w); | |
299 | } | |
cfc28c80 | 300 | } |
dc3e203e | 301 | abort (); |
b7742c6b AW |
302 | } |
303 | ||
a3cae847 AW |
304 | static SCM |
305 | capture_flat_env (SCM lambda, SCM env) | |
306 | { | |
307 | int nenv; | |
308 | SCM vars, link, locs; | |
309 | ||
310 | link = CAR (env); | |
311 | vars = env_link_vars (link); | |
312 | nenv = scm_ilength (vars); | |
313 | locs = scm_c_make_vector (nenv, SCM_BOOL_F); | |
314 | ||
315 | for (; scm_is_pair (vars); vars = CDR (vars)) | |
316 | scm_c_vector_set_x (locs, --nenv, CDAR (vars)); | |
317 | ||
318 | return MAKMEMO_CAPTURE_ENV (locs, lambda); | |
319 | } | |
320 | ||
dc3e203e AW |
321 | /* Abbreviate SCM_EXPANDED_REF. Copied because I'm not sure about symbol pasting */ |
322 | #define REF(x,type,field) \ | |
323 | (scm_struct_ref (x, SCM_I_MAKINUM (SCM_EXPANDED_##type##_##field))) | |
b7742c6b | 324 | |
dc3e203e | 325 | static SCM list_of_guile = SCM_BOOL_F; |
b7742c6b | 326 | |
dc3e203e | 327 | static SCM memoize (SCM exp, SCM env); |
b7742c6b AW |
328 | |
329 | static SCM | |
dc3e203e | 330 | memoize_exps (SCM exps, SCM env) |
b7742c6b | 331 | { |
dc3e203e AW |
332 | SCM ret; |
333 | for (ret = SCM_EOL; scm_is_pair (exps); exps = CDR (exps)) | |
334 | ret = scm_cons (memoize (CAR (exps), env), ret); | |
335 | return scm_reverse_x (ret, SCM_UNDEFINED); | |
7572ee52 | 336 | } |
7572ee52 | 337 | |
ef47c422 AW |
338 | static SCM |
339 | capture_env (SCM env) | |
340 | { | |
341 | if (scm_is_false (env)) | |
342 | return SCM_BOOL_T; | |
343 | return env; | |
344 | } | |
345 | ||
346 | static SCM | |
347 | maybe_makmemo_capture_module (SCM exp, SCM env) | |
348 | { | |
349 | if (scm_is_false (env)) | |
350 | return MAKMEMO_CAPTURE_MODULE (exp); | |
351 | return exp; | |
352 | } | |
353 | ||
7572ee52 | 354 | static SCM |
dc3e203e | 355 | memoize (SCM exp, SCM env) |
b7742c6b | 356 | { |
dc3e203e AW |
357 | if (!SCM_EXPANDED_P (exp)) |
358 | abort (); | |
b7742c6b | 359 | |
dc3e203e | 360 | switch (SCM_EXPANDED_TYPE (exp)) |
b7742c6b | 361 | { |
dc3e203e AW |
362 | case SCM_EXPANDED_VOID: |
363 | return MAKMEMO_QUOTE (SCM_UNSPECIFIED); | |
364 | ||
365 | case SCM_EXPANDED_CONST: | |
366 | return MAKMEMO_QUOTE (REF (exp, CONST, EXP)); | |
b7742c6b | 367 | |
dc3e203e AW |
368 | case SCM_EXPANDED_PRIMITIVE_REF: |
369 | if (scm_is_eq (scm_current_module (), scm_the_root_module ())) | |
ef47c422 | 370 | return maybe_makmemo_capture_module |
e6a42e67 AW |
371 | (MAKMEMO_BOX_REF (MAKMEMO_TOP_BOX (SCM_EXPANDED_TOPLEVEL_REF, |
372 | REF (exp, PRIMITIVE_REF, NAME))), | |
ef47c422 | 373 | env); |
dc3e203e | 374 | else |
e6a42e67 AW |
375 | return MAKMEMO_BOX_REF (MAKMEMO_MOD_BOX (SCM_EXPANDED_MODULE_REF, |
376 | list_of_guile, | |
377 | REF (exp, PRIMITIVE_REF, NAME), | |
378 | SCM_BOOL_F)); | |
dc3e203e AW |
379 | |
380 | case SCM_EXPANDED_LEXICAL_REF: | |
381 | return MAKMEMO_LEX_REF (lookup (REF (exp, LEXICAL_REF, GENSYM), env)); | |
382 | ||
383 | case SCM_EXPANDED_LEXICAL_SET: | |
384 | return MAKMEMO_LEX_SET (lookup (REF (exp, LEXICAL_SET, GENSYM), env), | |
385 | memoize (REF (exp, LEXICAL_SET, EXP), env)); | |
386 | ||
387 | case SCM_EXPANDED_MODULE_REF: | |
e6a42e67 AW |
388 | return MAKMEMO_BOX_REF (MAKMEMO_MOD_BOX |
389 | (SCM_EXPANDED_MODULE_REF, | |
390 | REF (exp, MODULE_REF, MOD), | |
391 | REF (exp, MODULE_REF, NAME), | |
392 | REF (exp, MODULE_REF, PUBLIC))); | |
dc3e203e AW |
393 | |
394 | case SCM_EXPANDED_MODULE_SET: | |
e6a42e67 AW |
395 | return MAKMEMO_BOX_SET (MAKMEMO_MOD_BOX |
396 | (SCM_EXPANDED_MODULE_SET, | |
397 | REF (exp, MODULE_SET, MOD), | |
398 | REF (exp, MODULE_SET, NAME), | |
399 | REF (exp, MODULE_SET, PUBLIC)), | |
400 | memoize (REF (exp, MODULE_SET, EXP), env)); | |
dc3e203e AW |
401 | |
402 | case SCM_EXPANDED_TOPLEVEL_REF: | |
ef47c422 | 403 | return maybe_makmemo_capture_module |
e6a42e67 AW |
404 | (MAKMEMO_BOX_REF (MAKMEMO_TOP_BOX (SCM_EXPANDED_TOPLEVEL_REF, |
405 | REF (exp, TOPLEVEL_REF, NAME))), | |
406 | env); | |
dc3e203e AW |
407 | |
408 | case SCM_EXPANDED_TOPLEVEL_SET: | |
ef47c422 | 409 | return maybe_makmemo_capture_module |
e6a42e67 AW |
410 | (MAKMEMO_BOX_SET (MAKMEMO_TOP_BOX (SCM_EXPANDED_TOPLEVEL_SET, |
411 | REF (exp, TOPLEVEL_SET, NAME)), | |
ef47c422 AW |
412 | memoize (REF (exp, TOPLEVEL_SET, EXP), |
413 | capture_env (env))), | |
414 | env); | |
dc3e203e AW |
415 | |
416 | case SCM_EXPANDED_TOPLEVEL_DEFINE: | |
e6a42e67 AW |
417 | return maybe_makmemo_capture_module |
418 | (MAKMEMO_BOX_SET (MAKMEMO_TOP_BOX (SCM_EXPANDED_TOPLEVEL_DEFINE, | |
419 | REF (exp, TOPLEVEL_DEFINE, NAME)), | |
420 | memoize (REF (exp, TOPLEVEL_DEFINE, EXP), | |
421 | capture_env (env))), | |
422 | env); | |
dc3e203e AW |
423 | |
424 | case SCM_EXPANDED_CONDITIONAL: | |
425 | return MAKMEMO_IF (memoize (REF (exp, CONDITIONAL, TEST), env), | |
426 | memoize (REF (exp, CONDITIONAL, CONSEQUENT), env), | |
427 | memoize (REF (exp, CONDITIONAL, ALTERNATE), env)); | |
428 | ||
7081d4f9 | 429 | case SCM_EXPANDED_CALL: |
dc3e203e AW |
430 | { |
431 | SCM proc, args; | |
b7742c6b | 432 | |
7081d4f9 AW |
433 | proc = REF (exp, CALL, PROC); |
434 | args = memoize_exps (REF (exp, CALL, ARGS), env); | |
b7742c6b | 435 | |
eb037656 | 436 | return MAKMEMO_CALL (memoize (proc, env), args); |
dc3e203e | 437 | } |
b7742c6b | 438 | |
a881a4ae AW |
439 | case SCM_EXPANDED_PRIMCALL: |
440 | { | |
1773bc7d AW |
441 | SCM name, args; |
442 | int nargs; | |
a881a4ae | 443 | |
1773bc7d | 444 | name = REF (exp, PRIMCALL, NAME); |
a881a4ae | 445 | args = memoize_exps (REF (exp, PRIMCALL, ARGS), env); |
1773bc7d AW |
446 | nargs = scm_ilength (args); |
447 | ||
448 | if (nargs == 3 | |
449 | && scm_is_eq (name, scm_from_latin1_symbol ("call-with-prompt"))) | |
450 | return MAKMEMO_CALL_WITH_PROMPT (CAR (args), | |
451 | CADR (args), | |
452 | CADDR (args)); | |
39caffe7 AW |
453 | else if (nargs == 2 |
454 | && scm_is_eq (name, scm_from_latin1_symbol ("apply"))) | |
455 | return MAKMEMO_APPLY (CAR (args), CADR (args)); | |
bc056057 AW |
456 | else if (nargs == 1 |
457 | && scm_is_eq (name, | |
458 | scm_from_latin1_symbol | |
459 | ("call-with-current-continuation"))) | |
460 | return MAKMEMO_CONT (CAR (args)); | |
0fcc39a0 AW |
461 | else if (nargs == 2 |
462 | && scm_is_eq (name, | |
463 | scm_from_latin1_symbol ("call-with-values"))) | |
464 | return MAKMEMO_CALL_WITH_VALUES (CAR (args), CADR (args)); | |
e6a42e67 AW |
465 | else if (nargs == 1 |
466 | && scm_is_eq (name, | |
467 | scm_from_latin1_symbol ("variable-ref"))) | |
468 | return MAKMEMO_BOX_REF (CAR (args)); | |
469 | else if (nargs == 2 | |
470 | && scm_is_eq (name, | |
471 | scm_from_latin1_symbol ("variable-set!"))) | |
472 | return MAKMEMO_BOX_SET (CAR (args), CADR (args)); | |
bb97e4ab AW |
473 | else if (nargs == 2 |
474 | && scm_is_eq (name, scm_from_latin1_symbol ("wind"))) | |
eb037656 | 475 | return MAKMEMO_CALL (MAKMEMO_QUOTE (wind), args); |
bb97e4ab AW |
476 | else if (nargs == 0 |
477 | && scm_is_eq (name, scm_from_latin1_symbol ("unwind"))) | |
eb037656 | 478 | return MAKMEMO_CALL (MAKMEMO_QUOTE (unwind), SCM_EOL); |
c32b7c4c AW |
479 | else if (nargs == 2 |
480 | && scm_is_eq (name, scm_from_latin1_symbol ("push-fluid"))) | |
eb037656 | 481 | return MAKMEMO_CALL (MAKMEMO_QUOTE (push_fluid), args); |
c32b7c4c AW |
482 | else if (nargs == 0 |
483 | && scm_is_eq (name, scm_from_latin1_symbol ("pop-fluid"))) | |
eb037656 | 484 | return MAKMEMO_CALL (MAKMEMO_QUOTE (pop_fluid), SCM_EOL); |
1773bc7d | 485 | else if (scm_is_eq (scm_current_module (), scm_the_root_module ())) |
ef47c422 | 486 | return MAKMEMO_CALL (maybe_makmemo_capture_module |
e6a42e67 AW |
487 | (MAKMEMO_BOX_REF |
488 | (MAKMEMO_TOP_BOX (SCM_EXPANDED_TOPLEVEL_REF, | |
489 | name)), | |
490 | env), | |
eb037656 | 491 | args); |
1773bc7d | 492 | else |
e6a42e67 AW |
493 | return MAKMEMO_CALL (MAKMEMO_BOX_REF |
494 | (MAKMEMO_MOD_BOX (SCM_EXPANDED_MODULE_REF, | |
495 | list_of_guile, | |
496 | name, | |
497 | SCM_BOOL_F)), | |
1773bc7d | 498 | args); |
a881a4ae AW |
499 | } |
500 | ||
6fc3eae4 AW |
501 | case SCM_EXPANDED_SEQ: |
502 | return MAKMEMO_SEQ (memoize (REF (exp, SEQ, HEAD), env), | |
503 | memoize (REF (exp, SEQ, TAIL), env)); | |
b7742c6b | 504 | |
dc3e203e | 505 | case SCM_EXPANDED_LAMBDA: |
e6a42e67 | 506 | /* The body will be a lambda-case. */ |
c438cd71 | 507 | { |
a3cae847 | 508 | SCM meta, body, proc, new_env; |
c438cd71 LC |
509 | |
510 | meta = REF (exp, LAMBDA, META); | |
19113f1c | 511 | body = REF (exp, LAMBDA, BODY); |
a3cae847 | 512 | new_env = push_flat_link (capture_env (env)); |
e6a42e67 AW |
513 | proc = memoize (body, new_env); |
514 | SCM_SETCAR (SCM_CDR (SCM_MEMOIZED_ARGS (proc)), meta); | |
c438cd71 | 515 | |
a3cae847 AW |
516 | return maybe_makmemo_capture_module (capture_flat_env (proc, new_env), |
517 | env); | |
c438cd71 | 518 | } |
b7742c6b | 519 | |
dc3e203e AW |
520 | case SCM_EXPANDED_LAMBDA_CASE: |
521 | { | |
522 | SCM req, rest, opt, kw, inits, vars, body, alt; | |
a3cae847 | 523 | SCM unbound, arity, rib, new_env; |
cfdc8416 | 524 | int nreq, nopt, ninits; |
dc3e203e AW |
525 | |
526 | req = REF (exp, LAMBDA_CASE, REQ); | |
d61d6686 | 527 | rest = scm_not (scm_not (REF (exp, LAMBDA_CASE, REST))); |
dc3e203e AW |
528 | opt = REF (exp, LAMBDA_CASE, OPT); |
529 | kw = REF (exp, LAMBDA_CASE, KW); | |
530 | inits = REF (exp, LAMBDA_CASE, INITS); | |
531 | vars = REF (exp, LAMBDA_CASE, GENSYMS); | |
532 | body = REF (exp, LAMBDA_CASE, BODY); | |
533 | alt = REF (exp, LAMBDA_CASE, ALTERNATE); | |
534 | ||
535 | nreq = scm_ilength (req); | |
536 | nopt = scm_is_pair (opt) ? scm_ilength (opt) : 0; | |
cfdc8416 AW |
537 | ninits = scm_ilength (inits); |
538 | /* This relies on assignment conversion turning inits into a | |
539 | sequence of CONST expressions whose values are a unique | |
540 | "unbound" token. */ | |
541 | unbound = ninits ? REF (CAR (inits), CONST, EXP) : SCM_BOOL_F; | |
cfc28c80 | 542 | rib = scm_vector (vars); |
a3cae847 | 543 | new_env = push_nested_link (rib, env); |
b7742c6b | 544 | |
632ddbf0 AW |
545 | if (scm_is_true (kw)) |
546 | { | |
547 | /* (aok? (kw name sym) ...) -> (aok? (kw . index) ...) */ | |
548 | SCM aok = CAR (kw), indices = SCM_EOL; | |
549 | for (kw = CDR (kw); scm_is_pair (kw); kw = CDR (kw)) | |
550 | { | |
551 | SCM k; | |
552 | int idx; | |
553 | ||
554 | k = CAR (CAR (kw)); | |
cfc28c80 | 555 | idx = lookup_rib (CADDR (CAR (kw)), rib); |
632ddbf0 AW |
556 | indices = scm_acons (k, SCM_I_MAKINUM (idx), indices); |
557 | } | |
558 | kw = scm_cons (aok, scm_reverse_x (indices, SCM_UNDEFINED)); | |
559 | } | |
560 | ||
dc3e203e AW |
561 | if (scm_is_false (alt) && scm_is_false (kw) && scm_is_false (opt)) |
562 | { | |
563 | if (scm_is_false (rest)) | |
564 | arity = FIXED_ARITY (nreq); | |
565 | else | |
566 | arity = REST_ARITY (nreq, SCM_BOOL_T); | |
567 | } | |
568 | else if (scm_is_true (alt)) | |
cfdc8416 | 569 | arity = FULL_ARITY (nreq, rest, nopt, kw, ninits, unbound, |
dc3e203e AW |
570 | SCM_MEMOIZED_ARGS (memoize (alt, env))); |
571 | else | |
cfdc8416 AW |
572 | arity = FULL_ARITY (nreq, rest, nopt, kw, ninits, unbound, |
573 | SCM_BOOL_F); | |
b7742c6b | 574 | |
a3cae847 | 575 | return MAKMEMO_LAMBDA (memoize (body, new_env), arity, |
95de4f52 | 576 | SCM_EOL /* meta, filled in later */); |
dc3e203e | 577 | } |
b7742c6b | 578 | |
dc3e203e AW |
579 | case SCM_EXPANDED_LET: |
580 | { | |
cfc28c80 AW |
581 | SCM vars, exps, body, varsv, inits, new_env; |
582 | int i; | |
dc3e203e AW |
583 | |
584 | vars = REF (exp, LET, GENSYMS); | |
585 | exps = REF (exp, LET, VALS); | |
586 | body = REF (exp, LET, BODY); | |
587 | ||
cfc28c80 AW |
588 | varsv = scm_vector (vars); |
589 | inits = scm_c_make_vector (VECTOR_LENGTH (varsv), | |
590 | SCM_BOOL_F); | |
a3cae847 | 591 | new_env = push_nested_link (varsv, capture_env (env)); |
cfc28c80 AW |
592 | for (i = 0; scm_is_pair (exps); exps = CDR (exps), i++) |
593 | VECTOR_SET (inits, i, memoize (CAR (exps), env)); | |
594 | ||
ef47c422 AW |
595 | return maybe_makmemo_capture_module |
596 | (MAKMEMO_LET (inits, memoize (body, new_env)), env); | |
dc3e203e | 597 | } |
b7742c6b | 598 | |
b7742c6b | 599 | default: |
dc3e203e | 600 | abort (); |
b7742c6b AW |
601 | } |
602 | } | |
603 | ||
604 | ||
605 | \f | |
606 | ||
607 | SCM_DEFINE (scm_memoize_expression, "memoize-expression", 1, 0, 0, | |
608 | (SCM exp), | |
609 | "Memoize the expression @var{exp}.") | |
610 | #define FUNC_NAME s_scm_memoize_expression | |
611 | { | |
a310a1d1 | 612 | SCM_ASSERT_TYPE (SCM_EXPANDED_P (exp), exp, 1, FUNC_NAME, "expanded"); |
7974c579 | 613 | return memoize (scm_convert_assignment (exp), SCM_BOOL_F); |
b7742c6b AW |
614 | } |
615 | #undef FUNC_NAME | |
616 | ||
2cd72a84 | 617 | |
b7742c6b AW |
618 | \f |
619 | ||
b7742c6b AW |
620 | SCM_SYMBOL (sym_placeholder, "_"); |
621 | ||
622 | static SCM unmemoize (SCM expr); | |
623 | ||
624 | static SCM | |
625 | unmemoize_exprs (SCM exprs) | |
626 | { | |
627 | SCM ret, tail; | |
628 | if (scm_is_null (exprs)) | |
629 | return SCM_EOL; | |
630 | ret = scm_list_1 (unmemoize (CAR (exprs))); | |
631 | tail = ret; | |
632 | for (exprs = CDR (exprs); !scm_is_null (exprs); exprs = CDR (exprs)) | |
633 | { | |
634 | SCM_SETCDR (tail, scm_list_1 (unmemoize (CAR (exprs)))); | |
635 | tail = CDR (tail); | |
636 | } | |
637 | return ret; | |
638 | } | |
639 | ||
640 | static SCM | |
641 | unmemoize_bindings (SCM inits) | |
642 | { | |
cfc28c80 AW |
643 | SCM ret = SCM_EOL; |
644 | int n = scm_c_vector_length (inits); | |
645 | ||
646 | while (n--) | |
647 | ret = scm_cons (unmemoize (scm_c_vector_ref (inits, n)), ret); | |
648 | ||
b7742c6b AW |
649 | return ret; |
650 | } | |
651 | ||
652 | static SCM | |
653 | unmemoize_lexical (SCM n) | |
654 | { | |
cfc28c80 AW |
655 | char buf[32]; |
656 | buf[31] = 0; | |
657 | snprintf (buf, 31, "<%u,%u>", scm_to_uint32 (CAR (n)), | |
658 | scm_to_uint32 (CDR (n))); | |
25d50a05 | 659 | return scm_from_utf8_symbol (buf); |
b7742c6b AW |
660 | } |
661 | ||
662 | static SCM | |
663 | unmemoize (const SCM expr) | |
664 | { | |
665 | SCM args; | |
666 | ||
b7742c6b AW |
667 | args = SCM_MEMOIZED_ARGS (expr); |
668 | switch (SCM_MEMOIZED_TAG (expr)) | |
669 | { | |
670 | case SCM_M_APPLY: | |
39caffe7 AW |
671 | return scm_cons (scm_from_latin1_symbol ("apply"), |
672 | unmemoize_exprs (args)); | |
6fc3eae4 AW |
673 | case SCM_M_SEQ: |
674 | return scm_list_3 (scm_sym_begin, unmemoize (CAR (args)), | |
675 | unmemoize (CDR (args))); | |
b7742c6b | 676 | case SCM_M_CALL: |
eb037656 | 677 | return unmemoize_exprs (args); |
b7742c6b | 678 | case SCM_M_CONT: |
bc056057 AW |
679 | return scm_list_2 (scm_from_latin1_symbol |
680 | ("call-with-current_continuation"), | |
681 | unmemoize (args)); | |
b7742c6b | 682 | case SCM_M_CALL_WITH_VALUES: |
0fcc39a0 | 683 | return scm_list_3 (scm_from_latin1_symbol ("call-with-values"), |
b7742c6b | 684 | unmemoize (CAR (args)), unmemoize (CDR (args))); |
ef47c422 AW |
685 | case SCM_M_CAPTURE_MODULE: |
686 | return scm_list_2 (scm_from_latin1_symbol ("capture-module"), | |
687 | unmemoize (args)); | |
b7742c6b AW |
688 | case SCM_M_IF: |
689 | return scm_list_4 (scm_sym_if, unmemoize (scm_car (args)), | |
690 | unmemoize (scm_cadr (args)), unmemoize (scm_cddr (args))); | |
691 | case SCM_M_LAMBDA: | |
c438cd71 LC |
692 | { |
693 | SCM body = CAR (args), spec = CDDR (args); | |
694 | ||
695 | if (scm_is_null (CDR (spec))) | |
696 | return scm_list_3 (scm_sym_lambda, | |
697 | scm_make_list (CAR (spec), sym_placeholder), | |
698 | unmemoize (CAR (args))); | |
699 | else if (scm_is_null (SCM_CDDR (spec))) | |
700 | { | |
701 | SCM formals = scm_make_list (CAR (spec), sym_placeholder); | |
702 | return scm_list_3 (scm_sym_lambda, | |
703 | scm_is_true (CADR (spec)) | |
704 | ? scm_cons_star (sym_placeholder, formals) | |
705 | : formals, | |
706 | unmemoize (CAR (args))); | |
707 | } | |
708 | else | |
709 | { | |
710 | SCM alt, tail; | |
711 | ||
cfdc8416 | 712 | alt = CADDDR (CDDDR (spec)); |
c438cd71 LC |
713 | if (scm_is_true (alt)) |
714 | tail = CDR (unmemoize (alt)); | |
715 | else | |
716 | tail = SCM_EOL; | |
717 | ||
718 | return scm_cons | |
719 | (sym_case_lambda_star, | |
720 | scm_cons (scm_list_2 (scm_list_5 (CAR (spec), | |
721 | CADR (spec), | |
722 | CADDR (spec), | |
723 | CADDDR (spec), | |
cfdc8416 | 724 | CADR (CDDDR (spec))), |
c438cd71 LC |
725 | unmemoize (body)), |
726 | tail)); | |
727 | } | |
728 | } | |
99fb07e1 AW |
729 | case SCM_M_CAPTURE_ENV: |
730 | return scm_list_3 (scm_from_latin1_symbol ("capture-env"), | |
731 | CAR (args), | |
732 | unmemoize (CDR (args))); | |
b7742c6b AW |
733 | case SCM_M_LET: |
734 | return scm_list_3 (scm_sym_let, | |
735 | unmemoize_bindings (CAR (args)), | |
736 | unmemoize (CDR (args))); | |
737 | case SCM_M_QUOTE: | |
738 | return scm_list_2 (scm_sym_quote, args); | |
739 | case SCM_M_LEXICAL_REF: | |
740 | return unmemoize_lexical (args); | |
741 | case SCM_M_LEXICAL_SET: | |
742 | return scm_list_3 (scm_sym_set_x, unmemoize_lexical (CAR (args)), | |
743 | unmemoize (CDR (args))); | |
e6a42e67 AW |
744 | case SCM_M_BOX_REF: |
745 | return scm_list_2 (scm_from_latin1_symbol ("variable-ref"), | |
746 | unmemoize (args)); | |
747 | case SCM_M_BOX_SET: | |
748 | return scm_list_3 (scm_from_latin1_symbol ("variable-set!"), | |
749 | unmemoize (CAR (args)), | |
750 | unmemoize (CDR (args))); | |
751 | case SCM_M_RESOLVE: | |
5bfc0653 AW |
752 | if (SCM_VARIABLEP (args)) |
753 | return args; | |
754 | else if (scm_is_symbol (CDR (args))) | |
755 | return CDR (args); | |
756 | else | |
757 | return scm_list_3 | |
758 | (scm_is_true (CDDDR (args)) ? scm_sym_at : scm_sym_atat, | |
759 | scm_i_finite_list_copy (CADR (args)), | |
760 | CADDR (args)); | |
1773bc7d AW |
761 | case SCM_M_CALL_WITH_PROMPT: |
762 | return scm_list_4 (scm_from_latin1_symbol ("call-with-prompt"), | |
747022e4 AW |
763 | unmemoize (CAR (args)), |
764 | unmemoize (CADR (args)), | |
765 | unmemoize (CDDR (args))); | |
b7742c6b AW |
766 | default: |
767 | abort (); | |
768 | } | |
769 | } | |
770 | ||
2cd72a84 AW |
771 | |
772 | \f | |
773 | ||
b7742c6b AW |
774 | SCM_DEFINE (scm_unmemoize_expression, "unmemoize-expression", 1, 0, 0, |
775 | (SCM m), | |
776 | "Unmemoize the memoized expression @var{m}.") | |
777 | #define FUNC_NAME s_scm_unmemoize_expression | |
778 | { | |
b7742c6b AW |
779 | return unmemoize (m); |
780 | } | |
781 | #undef FUNC_NAME | |
782 | ||
3149a5b6 AW |
783 | SCM_DEFINE (scm_memoized_typecode, "memoized-typecode", 1, 0, 0, |
784 | (SCM sym), | |
785 | "Return the memoized typecode corresponding to the symbol @var{sym}.") | |
786 | #define FUNC_NAME s_scm_memoized_typecode | |
787 | { | |
788 | int i; | |
789 | ||
790 | SCM_VALIDATE_SYMBOL (1, sym); | |
791 | ||
792 | for (i = 0; i < sizeof(memoized_tags)/sizeof(const char*); i++) | |
793 | if (strcmp (scm_i_symbol_chars (sym), memoized_tags[i]) == 0) | |
794 | return scm_from_int32 (i); | |
795 | ||
796 | return SCM_BOOL_F; | |
797 | } | |
798 | #undef FUNC_NAME | |
799 | ||
800 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); | |
801 | static void error_unbound_variable (SCM symbol) SCM_NORETURN; | |
802 | static void error_unbound_variable (SCM symbol) | |
803 | { | |
804 | scm_error (scm_unbound_variable_key, NULL, "Unbound variable: ~S", | |
805 | scm_list_1 (symbol), SCM_BOOL_F); | |
806 | } | |
807 | ||
e6a42e67 AW |
808 | SCM_DEFINE (scm_sys_resolve_variable, "%resolve-variable", 2, 0, 0, |
809 | (SCM loc, SCM mod), | |
810 | "Look up and return the variable for @var{loc}.") | |
811 | #define FUNC_NAME s_scm_sys_resolve_variable | |
3149a5b6 | 812 | { |
e6a42e67 | 813 | int mode; |
0720f70e | 814 | |
ef47c422 AW |
815 | if (scm_is_false (mod)) |
816 | mod = scm_the_root_module (); | |
817 | ||
e6a42e67 AW |
818 | mode = scm_to_int (scm_car (loc)); |
819 | loc = scm_cdr (loc); | |
3149a5b6 | 820 | |
e6a42e67 AW |
821 | switch (mode) |
822 | { | |
823 | case SCM_EXPANDED_TOPLEVEL_REF: | |
824 | case SCM_EXPANDED_TOPLEVEL_SET: | |
3149a5b6 | 825 | { |
e6a42e67 AW |
826 | SCM var = scm_module_variable (mod, loc); |
827 | if (scm_is_false (var) | |
828 | || (mode == SCM_EXPANDED_TOPLEVEL_REF | |
829 | && scm_is_false (scm_variable_bound_p (var)))) | |
830 | error_unbound_variable (loc); | |
831 | return var; | |
3149a5b6 AW |
832 | } |
833 | ||
e6a42e67 AW |
834 | case SCM_EXPANDED_TOPLEVEL_DEFINE: |
835 | { | |
836 | return scm_module_ensure_local_variable (mod, loc); | |
837 | } | |
3149a5b6 | 838 | |
e6a42e67 AW |
839 | case SCM_EXPANDED_MODULE_REF: |
840 | case SCM_EXPANDED_MODULE_SET: | |
841 | { | |
842 | SCM var; | |
843 | mod = scm_resolve_module (scm_car (loc)); | |
844 | if (scm_is_true (scm_cddr (loc))) | |
845 | mod = scm_module_public_interface (mod); | |
846 | var = scm_module_lookup (mod, scm_cadr (loc)); | |
847 | if (mode == SCM_EXPANDED_MODULE_SET | |
848 | && scm_is_false (scm_variable_bound_p (var))) | |
849 | error_unbound_variable (scm_cadr (loc)); | |
850 | return var; | |
851 | } | |
3149a5b6 AW |
852 | |
853 | default: | |
e6a42e67 | 854 | scm_wrong_type_arg (FUNC_NAME, 1, loc); |
3149a5b6 AW |
855 | return SCM_BOOL_F; |
856 | } | |
857 | } | |
858 | #undef FUNC_NAME | |
859 | ||
b7742c6b AW |
860 | |
861 | \f | |
862 | ||
863 | void | |
864 | scm_init_memoize () | |
865 | { | |
b7742c6b | 866 | #include "libguile/memoize.x" |
4f692ace | 867 | |
bb97e4ab AW |
868 | wind = scm_c_make_gsubr ("wind", 2, 0, 0, do_wind); |
869 | unwind = scm_c_make_gsubr ("unwind", 0, 0, 0, do_unwind); | |
c32b7c4c AW |
870 | push_fluid = scm_c_make_gsubr ("push-fluid", 2, 0, 0, do_push_fluid); |
871 | pop_fluid = scm_c_make_gsubr ("pop-fluid", 0, 0, 0, do_pop_fluid); | |
bb97e4ab | 872 | |
4a655e50 | 873 | list_of_guile = scm_list_1 (scm_from_latin1_symbol ("guile")); |
b7742c6b AW |
874 | } |
875 | ||
876 | /* | |
877 | Local Variables: | |
878 | c-file-style: "gnu" | |
879 | End: | |
880 | */ |