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d9c393f5 | 1 | /* Copyright (C) 1995,1996,1997,1998, 1999 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
0f2d19dd JB |
45 | \f |
46 | ||
6dbd0af5 MD |
47 | /* This file is read twice in order to produce debugging versions of |
48 | * scm_ceval and scm_apply. These functions, scm_deval and | |
49 | * scm_dapply, are produced when we define the preprocessor macro | |
50 | * DEVAL. The file is divided into sections which are treated | |
51 | * differently with respect to DEVAL. The heads of these sections are | |
52 | * marked with the string "SECTION:". | |
53 | */ | |
54 | ||
55 | ||
56 | /* SECTION: This code is compiled once. | |
0f2d19dd JB |
57 | */ |
58 | ||
59 | #ifndef DEVAL | |
60 | ||
d16332b3 JB |
61 | /* We need this to get the definitions for HAVE_ALLOCA_H, etc. */ |
62 | #include "scmconfig.h" | |
63 | ||
48b96f4b JB |
64 | /* AIX requires this to be the first thing in the file. The #pragma |
65 | directive is indented so pre-ANSI compilers will ignore it, rather | |
66 | than choke on it. */ | |
5862b540 | 67 | #ifndef __GNUC__ |
48b96f4b JB |
68 | # if HAVE_ALLOCA_H |
69 | # include <alloca.h> | |
70 | # else | |
71 | # ifdef _AIX | |
72 | #pragma alloca | |
73 | # else | |
74 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
75 | char *alloca (); | |
76 | # endif | |
77 | # endif | |
78 | # endif | |
79 | #endif | |
80 | ||
0f2d19dd JB |
81 | #include <stdio.h> |
82 | #include "_scm.h" | |
20e6290e | 83 | #include "debug.h" |
20e6290e | 84 | #include "alist.h" |
20e6290e JB |
85 | #include "eq.h" |
86 | #include "continuations.h" | |
87 | #include "throw.h" | |
88 | #include "smob.h" | |
6cb702da | 89 | #include "macros.h" |
20e6290e JB |
90 | #include "procprop.h" |
91 | #include "hashtab.h" | |
ac46ab16 | 92 | #include "hash.h" |
20e6290e JB |
93 | #include "srcprop.h" |
94 | #include "stackchk.h" | |
0c32d76c MD |
95 | #include "objects.h" |
96 | #include "feature.h" | |
185905af | 97 | #include "modules.h" |
20e6290e | 98 | |
1bbd0b84 | 99 | #include "scm_validate.h" |
20e6290e | 100 | #include "eval.h" |
89efbff4 | 101 | |
61364ba6 MD |
102 | SCM (*scm_memoize_method) (SCM, SCM); |
103 | ||
0f2d19dd JB |
104 | \f |
105 | ||
6dbd0af5 MD |
106 | /* The evaluator contains a plethora of EVAL symbols. |
107 | * This is an attempt at explanation. | |
108 | * | |
109 | * The following macros should be used in code which is read twice | |
110 | * (where the choice of evaluator is hard soldered): | |
111 | * | |
112 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
113 | * Originally, it is defined to scm_ceval, but is redefined to | |
114 | * scm_deval during the second pass. | |
115 | * | |
116 | * SIDEVAL corresponds to SCM_CEVAL, but is used in situations where | |
117 | * only side effects of expressions matter. All immediates are | |
118 | * ignored. | |
119 | * | |
6cb702da | 120 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
121 | * immediate. (This macro never calls an evaluator.) |
122 | * | |
123 | * EVALCAR evaluates the car of an expression. | |
124 | * | |
125 | * EVALCELLCAR is like EVALCAR, but is used when it is known that the | |
126 | * car is a lisp cell. | |
127 | * | |
128 | * The following macros should be used in code which is read once | |
129 | * (where the choice of evaluator is dynamic): | |
130 | * | |
6cb702da | 131 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
132 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
133 | * mode. | |
134 | * | |
6cb702da | 135 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
136 | * depending on the debugging mode. |
137 | * | |
138 | * The main motivation for keeping this plethora is efficiency | |
139 | * together with maintainability (=> locality of code). | |
140 | */ | |
141 | ||
6cb702da | 142 | #define SCM_CEVAL scm_ceval |
7d2b68a8 | 143 | #define SIDEVAL(x, env) if (SCM_NIMP (x)) SCM_CEVAL((x), (env)) |
6cb702da | 144 | |
7d2b68a8 MD |
145 | #define EVALCELLCAR(x, env) (SCM_SYMBOLP (SCM_CAR (x)) \ |
146 | ? *scm_lookupcar (x, env, 1) \ | |
147 | : SCM_CEVAL (SCM_CAR (x), env)) | |
0f2d19dd | 148 | |
7d2b68a8 MD |
149 | #define EVALCAR(x, env) (SCM_NCELLP (SCM_CAR (x)) \ |
150 | ? (SCM_IMP (SCM_CAR (x)) \ | |
151 | ? SCM_EVALIM (SCM_CAR (x), env) \ | |
152 | : SCM_GLOC_VAL (SCM_CAR (x))) \ | |
153 | : EVALCELLCAR (x, env)) | |
0f2d19dd | 154 | |
e2806c10 | 155 | #define EXTEND_ENV SCM_EXTEND_ENV |
0f2d19dd JB |
156 | |
157 | #ifdef MEMOIZE_LOCALS | |
1cc91f1b | 158 | |
0f2d19dd | 159 | SCM * |
6e8d25a6 | 160 | scm_ilookup (SCM iloc, SCM env) |
0f2d19dd JB |
161 | { |
162 | register int ir = SCM_IFRAME (iloc); | |
163 | register SCM er = env; | |
164 | for (; 0 != ir; --ir) | |
165 | er = SCM_CDR (er); | |
166 | er = SCM_CAR (er); | |
167 | for (ir = SCM_IDIST (iloc); 0 != ir; --ir) | |
168 | er = SCM_CDR (er); | |
169 | if (SCM_ICDRP (iloc)) | |
a23afe53 MD |
170 | return SCM_CDRLOC (er); |
171 | return SCM_CARLOC (SCM_CDR (er)); | |
0f2d19dd JB |
172 | } |
173 | #endif | |
174 | ||
f8769b1d MV |
175 | #ifdef USE_THREADS |
176 | ||
177 | /* The Lookup Car Race | |
178 | - by Eva Luator | |
179 | ||
180 | Memoization of variables and special forms is done while executing | |
181 | the code for the first time. As long as there is only one thread | |
182 | everything is fine, but as soon as two threads execute the same | |
183 | code concurrently `for the first time' they can come into conflict. | |
184 | ||
185 | This memoization includes rewriting variable references into more | |
186 | efficient forms and expanding macros. Furthermore, macro expansion | |
187 | includes `compiling' special forms like `let', `cond', etc. into | |
188 | tree-code instructions. | |
189 | ||
190 | There shouldn't normally be a problem with memoizing local and | |
191 | global variable references (into ilocs and glocs), because all | |
192 | threads will mutate the code in *exactly* the same way and (if I | |
193 | read the C code correctly) it is not possible to observe a half-way | |
194 | mutated cons cell. The lookup procedure can handle this | |
195 | transparently without any critical sections. | |
196 | ||
197 | It is different with macro expansion, because macro expansion | |
198 | happens outside of the lookup procedure and can't be | |
199 | undone. Therefore it can't cope with it. It has to indicate | |
200 | failure when it detects a lost race and hope that the caller can | |
201 | handle it. Luckily, it turns out that this is the case. | |
202 | ||
203 | An example to illustrate this: Suppose that the follwing form will | |
204 | be memoized concurrently by two threads | |
205 | ||
206 | (let ((x 12)) x) | |
207 | ||
208 | Let's first examine the lookup of X in the body. The first thread | |
209 | decides that it has to find the symbol "x" in the environment and | |
210 | starts to scan it. Then the other thread takes over and actually | |
211 | overtakes the first. It looks up "x" and substitutes an | |
212 | appropriate iloc for it. Now the first thread continues and | |
213 | completes its lookup. It comes to exactly the same conclusions as | |
214 | the second one and could - without much ado - just overwrite the | |
215 | iloc with the same iloc. | |
216 | ||
217 | But let's see what will happen when the race occurs while looking | |
218 | up the symbol "let" at the start of the form. It could happen that | |
219 | the second thread interrupts the lookup of the first thread and not | |
220 | only substitutes a gloc for it but goes right ahead and replaces it | |
221 | with the compiled form (#@let* (x 12) x). Now, when the first | |
222 | thread completes its lookup, it would replace the #@let* with a | |
223 | gloc pointing to the "let" binding, effectively reverting the form | |
224 | to (let (x 12) x). This is wrong. It has to detect that it has | |
225 | lost the race and the evaluator has to reconsider the changed form | |
226 | completely. | |
227 | ||
228 | This race condition could be resolved with some kind of traffic | |
229 | light (like mutexes) around scm_lookupcar, but I think that it is | |
230 | best to avoid them in this case. They would serialize memoization | |
231 | completely and because lookup involves calling arbitrary Scheme | |
232 | code (via the lookup-thunk), threads could be blocked for an | |
233 | arbitrary amount of time or even deadlock. But with the current | |
234 | solution a lot of unnecessary work is potentially done. */ | |
235 | ||
236 | /* SCM_LOOKUPCAR1 is was SCM_LOOKUPCAR used to be but is allowed to | |
237 | return NULL to indicate a failed lookup due to some race conditions | |
238 | between threads. This only happens when VLOC is the first cell of | |
239 | a special form that will eventually be memoized (like `let', etc.) | |
240 | In that case the whole lookup is bogus and the caller has to | |
241 | reconsider the complete special form. | |
242 | ||
243 | SCM_LOOKUPCAR is still there, of course. It just calls | |
244 | SCM_LOOKUPCAR1 and aborts on recieving NULL. So SCM_LOOKUPCAR | |
245 | should only be called when it is known that VLOC is not the first | |
246 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
247 | for NULL. I think I've found the only places where this |
248 | applies. */ | |
f8769b1d MV |
249 | |
250 | #endif /* USE_THREADS */ | |
1cc91f1b | 251 | |
26d5b9b4 MD |
252 | /* scm_lookupcar returns a pointer to this when a variable could not |
253 | be found and it should not throw an error. Never assign to this. | |
254 | */ | |
255 | static scm_cell undef_cell = { SCM_UNDEFINED, SCM_UNDEFINED }; | |
256 | ||
d0b7bad7 | 257 | #ifdef USE_THREADS |
8ecf1f13 | 258 | static SCM * |
26d5b9b4 | 259 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
d0b7bad7 MD |
260 | #else |
261 | SCM * | |
26d5b9b4 | 262 | scm_lookupcar (SCM vloc, SCM genv, int check) |
d0b7bad7 | 263 | #endif |
0f2d19dd JB |
264 | { |
265 | SCM env = genv; | |
e3173f93 JB |
266 | register SCM *al, fl, var = SCM_CAR (vloc); |
267 | #ifdef USE_THREADS | |
268 | register SCM var2 = var; | |
269 | #endif | |
0f2d19dd JB |
270 | #ifdef MEMOIZE_LOCALS |
271 | register SCM iloc = SCM_ILOC00; | |
272 | #endif | |
273 | for (; SCM_NIMP (env); env = SCM_CDR (env)) | |
274 | { | |
275 | if (SCM_BOOL_T == scm_procedure_p (SCM_CAR (env))) | |
276 | break; | |
a23afe53 | 277 | al = SCM_CARLOC (env); |
0f2d19dd JB |
278 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
279 | { | |
280 | if (SCM_NCONSP (fl)) | |
33b97402 | 281 | { |
0f2d19dd JB |
282 | if (fl == var) |
283 | { | |
284 | #ifdef MEMOIZE_LOCALS | |
f8769b1d MV |
285 | #ifdef USE_THREADS |
286 | if (SCM_CAR (vloc) != var) | |
287 | goto race; | |
288 | #endif | |
a23afe53 | 289 | SCM_SETCAR (vloc, iloc + SCM_ICDR); |
0f2d19dd | 290 | #endif |
a23afe53 | 291 | return SCM_CDRLOC (*al); |
0f2d19dd | 292 | } |
33b97402 MD |
293 | else |
294 | break; | |
295 | } | |
a23afe53 | 296 | al = SCM_CDRLOC (*al); |
0f2d19dd JB |
297 | if (SCM_CAR (fl) == var) |
298 | { | |
299 | #ifdef MEMOIZE_LOCALS | |
cf7c17e9 | 300 | #ifndef SCM_RECKLESS /* letrec inits to SCM_UNDEFINED */ |
0f2d19dd JB |
301 | if (SCM_UNBNDP (SCM_CAR (*al))) |
302 | { | |
303 | env = SCM_EOL; | |
304 | goto errout; | |
305 | } | |
f8769b1d MV |
306 | #endif |
307 | #ifdef USE_THREADS | |
308 | if (SCM_CAR (vloc) != var) | |
309 | goto race; | |
0f2d19dd | 310 | #endif |
a23afe53 | 311 | SCM_SETCAR (vloc, iloc); |
0f2d19dd | 312 | #endif |
a23afe53 | 313 | return SCM_CARLOC (*al); |
0f2d19dd JB |
314 | } |
315 | #ifdef MEMOIZE_LOCALS | |
316 | iloc += SCM_IDINC; | |
317 | #endif | |
318 | } | |
319 | #ifdef MEMOIZE_LOCALS | |
320 | iloc = (~SCM_IDSTMSK) & (iloc + SCM_IFRINC); | |
321 | #endif | |
322 | } | |
323 | { | |
324 | SCM top_thunk, vcell; | |
325 | if (SCM_NIMP(env)) | |
326 | { | |
327 | top_thunk = SCM_CAR(env); /* env now refers to a top level env thunk */ | |
328 | env = SCM_CDR (env); | |
329 | } | |
330 | else | |
331 | top_thunk = SCM_BOOL_F; | |
332 | vcell = scm_sym2vcell (var, top_thunk, SCM_BOOL_F); | |
333 | if (vcell == SCM_BOOL_F) | |
334 | goto errout; | |
335 | else | |
336 | var = vcell; | |
337 | } | |
cf7c17e9 | 338 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
339 | if (SCM_NNULLP (env) || SCM_UNBNDP (SCM_CDR (var))) |
340 | { | |
341 | var = SCM_CAR (var); | |
342 | errout: | |
f5bf2977 | 343 | /* scm_everr (vloc, genv,...) */ |
26d5b9b4 MD |
344 | if (check) |
345 | scm_misc_error (NULL, | |
346 | SCM_NULLP (env) | |
347 | ? "Unbound variable: %S" | |
348 | : "Damaged environment: %S", | |
349 | scm_listify (var, SCM_UNDEFINED)); | |
350 | else | |
351 | return SCM_CDRLOC (&undef_cell); | |
0f2d19dd JB |
352 | } |
353 | #endif | |
f8769b1d MV |
354 | #ifdef USE_THREADS |
355 | if (SCM_CAR (vloc) != var2) | |
356 | { | |
357 | /* Some other thread has changed the very cell we are working | |
358 | on. In effect, it must have done our job or messed it up | |
359 | completely. */ | |
360 | race: | |
361 | var = SCM_CAR (vloc); | |
362 | if ((var & 7) == 1) | |
363 | return SCM_GLOC_VAL_LOC (var); | |
364 | #ifdef MEMOIZE_LOCALS | |
365 | if ((var & 127) == (127 & SCM_ILOC00)) | |
366 | return scm_ilookup (var, genv); | |
367 | #endif | |
368 | /* We can't cope with anything else than glocs and ilocs. When | |
369 | a special form has been memoized (i.e. `let' into `#@let') we | |
370 | return NULL and expect the calling function to do the right | |
371 | thing. For the evaluator, this means going back and redoing | |
372 | the dispatch on the car of the form. */ | |
373 | return NULL; | |
374 | } | |
375 | #endif /* USE_THREADS */ | |
376 | ||
a23afe53 | 377 | SCM_SETCAR (vloc, var + 1); |
0f2d19dd | 378 | /* Except wait...what if the var is not a vcell, |
f8769b1d | 379 | * but syntax or something.... */ |
a23afe53 | 380 | return SCM_CDRLOC (var); |
0f2d19dd JB |
381 | } |
382 | ||
f8769b1d MV |
383 | #ifdef USE_THREADS |
384 | SCM * | |
6e8d25a6 | 385 | scm_lookupcar (SCM vloc, SCM genv, int check) |
f8769b1d | 386 | { |
26d5b9b4 | 387 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
388 | if (loc == NULL) |
389 | abort (); | |
390 | return loc; | |
391 | } | |
f8769b1d MV |
392 | #endif |
393 | ||
0f2d19dd | 394 | #define unmemocar scm_unmemocar |
1cc91f1b | 395 | |
0f2d19dd | 396 | SCM |
6e8d25a6 | 397 | scm_unmemocar (SCM form, SCM env) |
0f2d19dd | 398 | { |
6dbd0af5 | 399 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd | 400 | register int ir; |
6dbd0af5 | 401 | #endif |
0f2d19dd JB |
402 | SCM c; |
403 | ||
404 | if (SCM_IMP (form)) | |
405 | return form; | |
406 | c = SCM_CAR (form); | |
407 | if (1 == (c & 7)) | |
a23afe53 | 408 | SCM_SETCAR (form, SCM_CAR (c - 1)); |
0f2d19dd | 409 | #ifdef MEMOIZE_LOCALS |
6dbd0af5 | 410 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd JB |
411 | else if (SCM_ILOCP (c)) |
412 | { | |
413 | for (ir = SCM_IFRAME (c); ir != 0; --ir) | |
414 | env = SCM_CDR (env); | |
415 | env = SCM_CAR (SCM_CAR (env)); | |
416 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
417 | env = SCM_CDR (env); | |
a23afe53 | 418 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); |
0f2d19dd | 419 | } |
6dbd0af5 | 420 | #endif |
0f2d19dd JB |
421 | #endif |
422 | return form; | |
423 | } | |
424 | ||
1cc91f1b | 425 | |
0f2d19dd | 426 | SCM |
6e8d25a6 | 427 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 428 | { |
6cb702da | 429 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
430 | } |
431 | ||
432 | \f | |
433 | /* | |
434 | * The following rewrite expressions and | |
435 | * some memoized forms have different syntax | |
436 | */ | |
437 | ||
3eeba8d4 JB |
438 | const char scm_s_expression[] = "missing or extra expression"; |
439 | const char scm_s_test[] = "bad test"; | |
440 | const char scm_s_body[] = "bad body"; | |
441 | const char scm_s_bindings[] = "bad bindings"; | |
442 | const char scm_s_variable[] = "bad variable"; | |
443 | const char scm_s_clauses[] = "bad or missing clauses"; | |
444 | const char scm_s_formals[] = "bad formals"; | |
0f2d19dd | 445 | |
81123e6d MD |
446 | SCM scm_sym_dot, scm_sym_arrow, scm_sym_else; |
447 | SCM scm_sym_unquote, scm_sym_uq_splicing, scm_sym_apply; | |
448 | ||
449 | SCM scm_f_apply; | |
b8229a3b | 450 | |
6dbd0af5 | 451 | #ifdef DEBUG_EXTENSIONS |
2f0d1375 MD |
452 | SCM scm_sym_enter_frame, scm_sym_apply_frame, scm_sym_exit_frame; |
453 | SCM scm_sym_trace; | |
6dbd0af5 | 454 | #endif |
0f2d19dd JB |
455 | |
456 | #define ASRTSYNTAX(cond_, msg_) if(!(cond_))scm_wta(xorig, (msg_), what); | |
457 | ||
458 | ||
1cc91f1b | 459 | |
e4755e5c | 460 | static void bodycheck SCM_P ((SCM xorig, SCM *bodyloc, const char *what)); |
1cc91f1b | 461 | |
0f2d19dd | 462 | static void |
6e8d25a6 | 463 | bodycheck (SCM xorig, SCM *bodyloc, const char *what) |
0f2d19dd | 464 | { |
6cb702da | 465 | ASRTSYNTAX (scm_ilength (*bodyloc) >= 1, scm_s_expression); |
0f2d19dd JB |
466 | } |
467 | ||
26d5b9b4 MD |
468 | /* Check that the body denoted by XORIG is valid and rewrite it into |
469 | its internal form. The internal form of a body is just the body | |
470 | itself, but prefixed with an ISYM that denotes to what kind of | |
471 | outer construct this body belongs. A lambda body starts with | |
472 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
473 | etc. The one exception is a body that belongs to a letrec that has | |
474 | been formed by rewriting internal defines: it starts with | |
475 | SCM_IM_DEFINE. */ | |
476 | ||
477 | /* XXX - Besides controlling the rewriting of internal defines, the | |
478 | additional ISYM could be used for improved error messages. | |
479 | This is not done yet. */ | |
480 | ||
481 | static SCM | |
6e8d25a6 | 482 | scm_m_body (SCM op, SCM xorig, const char *what) |
26d5b9b4 MD |
483 | { |
484 | ASRTSYNTAX (scm_ilength (xorig) >= 1, scm_s_expression); | |
485 | ||
486 | /* Don't add another ISYM if one is present already. */ | |
487 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
488 | return xorig; | |
489 | ||
490 | /* Retain possible doc string. */ | |
491 | if (SCM_IMP (SCM_CAR(xorig)) || SCM_NCONSP (SCM_CAR (xorig))) | |
492 | { | |
493 | if (SCM_NNULLP (SCM_CDR(xorig))) | |
494 | return scm_cons (SCM_CAR (xorig), | |
495 | scm_m_body (op, SCM_CDR(xorig), what)); | |
496 | return xorig; | |
497 | } | |
498 | ||
499 | return scm_cons2 (op, SCM_CAR (xorig), SCM_CDR(xorig)); | |
500 | } | |
501 | ||
b8229a3b | 502 | SCM_SYNTAX(s_quote,"quote", scm_makmmacro, scm_m_quote); |
2f0d1375 | 503 | SCM_GLOBAL_SYMBOL(scm_sym_quote, s_quote); |
1cc91f1b | 504 | |
0f2d19dd | 505 | SCM |
6e8d25a6 | 506 | scm_m_quote (SCM xorig, SCM env) |
0f2d19dd | 507 | { |
26d5b9b4 MD |
508 | SCM x = scm_copy_tree (SCM_CDR (xorig)); |
509 | ||
6cb702da | 510 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
b8229a3b | 511 | xorig, scm_s_expression, s_quote); |
3a3111a8 | 512 | return scm_cons (SCM_IM_QUOTE, x); |
0f2d19dd JB |
513 | } |
514 | ||
515 | ||
1cc91f1b | 516 | |
b8229a3b | 517 | SCM_SYNTAX(s_begin, "begin", scm_makmmacro, scm_m_begin); |
2f0d1375 | 518 | SCM_GLOBAL_SYMBOL(scm_sym_begin, s_begin); |
b8229a3b | 519 | |
0f2d19dd | 520 | SCM |
6e8d25a6 | 521 | scm_m_begin (SCM xorig, SCM env) |
0f2d19dd | 522 | { |
6cb702da | 523 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 1, |
b8229a3b | 524 | xorig, scm_s_expression, s_begin); |
3a3111a8 | 525 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
0f2d19dd JB |
526 | } |
527 | ||
b8229a3b | 528 | SCM_SYNTAX(s_if, "if", scm_makmmacro, scm_m_if); |
2f0d1375 | 529 | SCM_GLOBAL_SYMBOL(scm_sym_if, s_if); |
1cc91f1b | 530 | |
0f2d19dd | 531 | SCM |
6e8d25a6 | 532 | scm_m_if (SCM xorig, SCM env) |
0f2d19dd JB |
533 | { |
534 | int len = scm_ilength (SCM_CDR (xorig)); | |
6cb702da | 535 | SCM_ASSYNT (len >= 2 && len <= 3, xorig, scm_s_expression, "if"); |
3a3111a8 | 536 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
537 | } |
538 | ||
539 | ||
89efbff4 MD |
540 | /* Will go into the RnRS module when Guile is factorized. |
541 | SCM_SYNTAX(scm_s_set_x,"set!", scm_makmmacro, scm_m_set_x); */ | |
542 | const char scm_s_set_x[] = "set!"; | |
543 | SCM_GLOBAL_SYMBOL(scm_sym_set_x, scm_s_set_x); | |
1cc91f1b | 544 | |
0f2d19dd | 545 | SCM |
6e8d25a6 | 546 | scm_m_set_x (SCM xorig, SCM env) |
0f2d19dd | 547 | { |
6dbd0af5 | 548 | SCM x = SCM_CDR (xorig); |
89efbff4 | 549 | SCM_ASSYNT (2 == scm_ilength (x), xorig, scm_s_expression, scm_s_set_x); |
cabe682c | 550 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (x)), |
89efbff4 | 551 | xorig, scm_s_variable, scm_s_set_x); |
3a3111a8 | 552 | return scm_cons (SCM_IM_SET_X, x); |
0f2d19dd JB |
553 | } |
554 | ||
555 | ||
556 | #if 0 | |
1cc91f1b | 557 | |
0f2d19dd | 558 | SCM |
6e8d25a6 | 559 | scm_m_vref (SCM xorig, SCM env) |
0f2d19dd JB |
560 | { |
561 | SCM x = SCM_CDR (xorig); | |
6cb702da | 562 | SCM_ASSYNT (1 == scm_ilength (x), xorig, scm_s_expression, s_vref); |
0f2d19dd JB |
563 | if (SCM_NIMP(x) && UDSCM_VARIABLEP (SCM_CAR (x))) |
564 | { | |
f5bf2977 | 565 | /* scm_everr (SCM_UNDEFINED, env,..., "global variable reference") */ |
523f5266 GH |
566 | scm_misc_error (NULL, |
567 | "Bad variable: %S", | |
568 | scm_listify (SCM_CAR (SCM_CDR (x)), SCM_UNDEFINED)); | |
0f2d19dd | 569 | } |
6cb702da MD |
570 | SCM_ASSYNT (SCM_NIMP(x) && DEFSCM_VARIABLEP (SCM_CAR (x)), |
571 | xorig, scm_s_variable, s_vref); | |
0f2d19dd JB |
572 | return scm_cons (IM_VREF, x); |
573 | } | |
574 | ||
575 | ||
1cc91f1b | 576 | |
0f2d19dd | 577 | SCM |
6e8d25a6 | 578 | scm_m_vset (SCM xorig, SCM env) |
0f2d19dd JB |
579 | { |
580 | SCM x = SCM_CDR (xorig); | |
6cb702da MD |
581 | SCM_ASSYNT (3 == scm_ilength (x), xorig, scm_s_expression, s_vset); |
582 | SCM_ASSYNT ((DEFSCM_VARIABLEP (SCM_CAR (x)) | |
583 | || UDSCM_VARIABLEP (SCM_CAR (x))), | |
584 | xorig, scm_s_variable, s_vset); | |
0f2d19dd JB |
585 | return scm_cons (IM_VSET, x); |
586 | } | |
587 | #endif | |
588 | ||
589 | ||
b8229a3b | 590 | SCM_SYNTAX(s_and, "and", scm_makmmacro, scm_m_and); |
2f0d1375 | 591 | SCM_GLOBAL_SYMBOL(scm_sym_and, s_and); |
1cc91f1b | 592 | |
0f2d19dd | 593 | SCM |
6e8d25a6 | 594 | scm_m_and (SCM xorig, SCM env) |
0f2d19dd JB |
595 | { |
596 | int len = scm_ilength (SCM_CDR (xorig)); | |
b8229a3b | 597 | SCM_ASSYNT (len >= 0, xorig, scm_s_test, s_and); |
0f2d19dd | 598 | if (len >= 1) |
3a3111a8 | 599 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); |
0f2d19dd JB |
600 | else |
601 | return SCM_BOOL_T; | |
602 | } | |
603 | ||
b8229a3b | 604 | SCM_SYNTAX(s_or,"or", scm_makmmacro, scm_m_or); |
2f0d1375 | 605 | SCM_GLOBAL_SYMBOL(scm_sym_or,s_or); |
1cc91f1b | 606 | |
0f2d19dd | 607 | SCM |
6e8d25a6 | 608 | scm_m_or (SCM xorig, SCM env) |
0f2d19dd JB |
609 | { |
610 | int len = scm_ilength (SCM_CDR (xorig)); | |
b8229a3b | 611 | SCM_ASSYNT (len >= 0, xorig, scm_s_test, s_or); |
0f2d19dd | 612 | if (len >= 1) |
3a3111a8 | 613 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); |
0f2d19dd JB |
614 | else |
615 | return SCM_BOOL_F; | |
616 | } | |
617 | ||
618 | ||
b8229a3b | 619 | SCM_SYNTAX(s_case, "case", scm_makmmacro, scm_m_case); |
2f0d1375 | 620 | SCM_GLOBAL_SYMBOL(scm_sym_case, s_case); |
1cc91f1b | 621 | |
0f2d19dd | 622 | SCM |
6e8d25a6 | 623 | scm_m_case (SCM xorig, SCM env) |
0f2d19dd | 624 | { |
26d5b9b4 | 625 | SCM proc, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
b8229a3b | 626 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_clauses, s_case); |
0f2d19dd JB |
627 | while (SCM_NIMP (x = SCM_CDR (x))) |
628 | { | |
629 | proc = SCM_CAR (x); | |
b8229a3b | 630 | SCM_ASSYNT (scm_ilength (proc) >= 2, xorig, scm_s_clauses, s_case); |
6cb702da | 631 | SCM_ASSYNT (scm_ilength (SCM_CAR (proc)) >= 0 |
2f0d1375 | 632 | || scm_sym_else == SCM_CAR (proc), |
b8229a3b | 633 | xorig, scm_s_clauses, s_case); |
0f2d19dd | 634 | } |
3a3111a8 | 635 | return scm_cons (SCM_IM_CASE, cdrx); |
0f2d19dd JB |
636 | } |
637 | ||
638 | ||
b8229a3b | 639 | SCM_SYNTAX(s_cond, "cond", scm_makmmacro, scm_m_cond); |
2f0d1375 | 640 | SCM_GLOBAL_SYMBOL(scm_sym_cond, s_cond); |
b8229a3b | 641 | |
1cc91f1b | 642 | |
0f2d19dd | 643 | SCM |
6e8d25a6 | 644 | scm_m_cond (SCM xorig, SCM env) |
0f2d19dd | 645 | { |
26d5b9b4 | 646 | SCM arg1, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
0f2d19dd | 647 | int len = scm_ilength (x); |
b8229a3b | 648 | SCM_ASSYNT (len >= 1, xorig, scm_s_clauses, s_cond); |
0f2d19dd JB |
649 | while (SCM_NIMP (x)) |
650 | { | |
651 | arg1 = SCM_CAR (x); | |
652 | len = scm_ilength (arg1); | |
b8229a3b | 653 | SCM_ASSYNT (len >= 1, xorig, scm_s_clauses, s_cond); |
2f0d1375 | 654 | if (scm_sym_else == SCM_CAR (arg1)) |
0f2d19dd | 655 | { |
6cb702da | 656 | SCM_ASSYNT (SCM_NULLP (SCM_CDR (x)) && len >= 2, |
b8229a3b | 657 | xorig, "bad ELSE clause", s_cond); |
a23afe53 | 658 | SCM_SETCAR (arg1, SCM_BOOL_T); |
0f2d19dd | 659 | } |
2f0d1375 | 660 | if (len >= 2 && scm_sym_arrow == SCM_CAR (SCM_CDR (arg1))) |
6cb702da | 661 | SCM_ASSYNT (3 == len && SCM_NIMP (SCM_CAR (SCM_CDR (SCM_CDR (arg1)))), |
b8229a3b | 662 | xorig, "bad recipient", s_cond); |
0f2d19dd JB |
663 | x = SCM_CDR (x); |
664 | } | |
3a3111a8 | 665 | return scm_cons (SCM_IM_COND, cdrx); |
0f2d19dd JB |
666 | } |
667 | ||
b8229a3b | 668 | SCM_SYNTAX(s_lambda, "lambda", scm_makmmacro, scm_m_lambda); |
2f0d1375 | 669 | SCM_GLOBAL_SYMBOL(scm_sym_lambda, s_lambda); |
1cc91f1b | 670 | |
0f2d19dd | 671 | SCM |
6e8d25a6 | 672 | scm_m_lambda (SCM xorig, SCM env) |
0f2d19dd JB |
673 | { |
674 | SCM proc, x = SCM_CDR (xorig); | |
26d5b9b4 | 675 | if (scm_ilength (x) < 2) |
0f2d19dd JB |
676 | goto badforms; |
677 | proc = SCM_CAR (x); | |
33b97402 MD |
678 | if (SCM_NULLP (proc)) |
679 | goto memlambda; | |
26d5b9b4 MD |
680 | if (SCM_IM_LET == proc) /* named let */ |
681 | goto memlambda; | |
33b97402 MD |
682 | if (SCM_IMP (proc)) |
683 | goto badforms; | |
684 | if (SCM_SYMBOLP (proc)) | |
685 | goto memlambda; | |
686 | if (SCM_NCONSP (proc)) | |
687 | goto badforms; | |
688 | while (SCM_NIMP (proc)) | |
0f2d19dd | 689 | { |
33b97402 MD |
690 | if (SCM_NCONSP (proc)) |
691 | { | |
0f2d19dd | 692 | if (!SCM_SYMBOLP (proc)) |
33b97402 MD |
693 | goto badforms; |
694 | else | |
695 | goto memlambda; | |
696 | } | |
0c95b57d | 697 | if (!SCM_SYMBOLP (SCM_CAR (proc))) |
0f2d19dd JB |
698 | goto badforms; |
699 | proc = SCM_CDR (proc); | |
700 | } | |
ff467021 | 701 | if (SCM_NNULLP (proc)) |
26d5b9b4 MD |
702 | { |
703 | badforms: | |
704 | scm_wta (xorig, scm_s_formals, s_lambda); | |
705 | } | |
706 | ||
707 | memlambda: | |
3a3111a8 MD |
708 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), |
709 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd JB |
710 | } |
711 | ||
b8229a3b | 712 | SCM_SYNTAX(s_letstar,"let*", scm_makmmacro, scm_m_letstar); |
2f0d1375 | 713 | SCM_GLOBAL_SYMBOL(scm_sym_letstar,s_letstar); |
0f2d19dd | 714 | |
1cc91f1b | 715 | |
0f2d19dd | 716 | SCM |
6e8d25a6 | 717 | scm_m_letstar (SCM xorig, SCM env) |
0f2d19dd JB |
718 | { |
719 | SCM x = SCM_CDR (xorig), arg1, proc, vars = SCM_EOL, *varloc = &vars; | |
720 | int len = scm_ilength (x); | |
b8229a3b | 721 | SCM_ASSYNT (len >= 2, xorig, scm_s_body, s_letstar); |
0f2d19dd | 722 | proc = SCM_CAR (x); |
b8229a3b | 723 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, s_letstar); |
ff467021 | 724 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
725 | { |
726 | arg1 = SCM_CAR (proc); | |
b8229a3b | 727 | SCM_ASSYNT (2 == scm_ilength (arg1), xorig, scm_s_bindings, s_letstar); |
0c95b57d | 728 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), xorig, scm_s_variable, s_letstar); |
0f2d19dd | 729 | *varloc = scm_cons2 (SCM_CAR (arg1), SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 730 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
0f2d19dd JB |
731 | proc = SCM_CDR (proc); |
732 | } | |
733 | x = scm_cons (vars, SCM_CDR (x)); | |
26d5b9b4 | 734 | |
3a3111a8 MD |
735 | return scm_cons2 (SCM_IM_LETSTAR, SCM_CAR (x), |
736 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); | |
0f2d19dd JB |
737 | } |
738 | ||
739 | /* DO gets the most radically altered syntax | |
740 | (do ((<var1> <init1> <step1>) | |
741 | (<var2> <init2>) | |
742 | ... ) | |
743 | (<test> <return>) | |
744 | <body>) | |
745 | ;; becomes | |
746 | (do_mem (varn ... var2 var1) | |
747 | (<init1> <init2> ... <initn>) | |
748 | (<test> <return>) | |
749 | (<body>) | |
750 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
751 | */ | |
752 | ||
b8229a3b | 753 | SCM_SYNTAX(s_do, "do", scm_makmmacro, scm_m_do); |
2f0d1375 | 754 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 755 | |
0f2d19dd | 756 | SCM |
6e8d25a6 | 757 | scm_m_do (SCM xorig, SCM env) |
0f2d19dd JB |
758 | { |
759 | SCM x = SCM_CDR (xorig), arg1, proc; | |
760 | SCM vars = SCM_EOL, inits = SCM_EOL, steps = SCM_EOL; | |
761 | SCM *initloc = &inits, *steploc = &steps; | |
762 | int len = scm_ilength (x); | |
6cb702da | 763 | SCM_ASSYNT (len >= 2, xorig, scm_s_test, "do"); |
0f2d19dd | 764 | proc = SCM_CAR (x); |
6cb702da | 765 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, "do"); |
ff467021 | 766 | while (SCM_NIMP(proc)) |
0f2d19dd JB |
767 | { |
768 | arg1 = SCM_CAR (proc); | |
769 | len = scm_ilength (arg1); | |
6cb702da | 770 | SCM_ASSYNT (2 == len || 3 == len, xorig, scm_s_bindings, "do"); |
0c95b57d | 771 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), xorig, scm_s_variable, "do"); |
0f2d19dd JB |
772 | /* vars reversed here, inits and steps reversed at evaluation */ |
773 | vars = scm_cons (SCM_CAR (arg1), vars); /* variable */ | |
774 | arg1 = SCM_CDR (arg1); | |
775 | *initloc = scm_cons (SCM_CAR (arg1), SCM_EOL); /* init */ | |
a23afe53 | 776 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
777 | arg1 = SCM_CDR (arg1); |
778 | *steploc = scm_cons (SCM_IMP (arg1) ? SCM_CAR (vars) : SCM_CAR (arg1), SCM_EOL); /* step */ | |
a23afe53 | 779 | steploc = SCM_CDRLOC (*steploc); |
0f2d19dd JB |
780 | proc = SCM_CDR (proc); |
781 | } | |
782 | x = SCM_CDR (x); | |
6cb702da | 783 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, xorig, scm_s_test, "do"); |
0f2d19dd JB |
784 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
785 | x = scm_cons2 (vars, inits, x); | |
a23afe53 | 786 | bodycheck (xorig, SCM_CARLOC (SCM_CDR (SCM_CDR (x))), "do"); |
3a3111a8 | 787 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
788 | } |
789 | ||
6dbd0af5 MD |
790 | /* evalcar is small version of inline EVALCAR when we don't care about |
791 | * speed | |
792 | */ | |
793 | #define evalcar scm_eval_car | |
0f2d19dd | 794 | |
1cc91f1b | 795 | |
1bbd0b84 | 796 | static SCM iqq (SCM form, SCM env, int depth); |
1cc91f1b | 797 | |
b8229a3b | 798 | SCM_SYNTAX(s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
2f0d1375 | 799 | SCM_GLOBAL_SYMBOL(scm_sym_quasiquote, s_quasiquote); |
b8229a3b MS |
800 | |
801 | SCM | |
6e8d25a6 | 802 | scm_m_quasiquote (SCM xorig, SCM env) |
b8229a3b MS |
803 | { |
804 | SCM x = SCM_CDR (xorig); | |
805 | SCM_ASSYNT (scm_ilength (x) == 1, xorig, scm_s_expression, s_quasiquote); | |
806 | return iqq (SCM_CAR (x), env, 1); | |
807 | } | |
808 | ||
809 | ||
0f2d19dd | 810 | static SCM |
1bbd0b84 | 811 | iqq (SCM form,SCM env,int depth) |
0f2d19dd JB |
812 | { |
813 | SCM tmp; | |
814 | int edepth = depth; | |
ff467021 JB |
815 | if (SCM_IMP(form)) |
816 | return form; | |
0f2d19dd JB |
817 | if (SCM_VECTORP (form)) |
818 | { | |
819 | long i = SCM_LENGTH (form); | |
820 | SCM *data = SCM_VELTS (form); | |
821 | tmp = SCM_EOL; | |
822 | for (; --i >= 0;) | |
823 | tmp = scm_cons (data[i], tmp); | |
824 | return scm_vector (iqq (tmp, env, depth)); | |
825 | } | |
ff467021 JB |
826 | if (SCM_NCONSP(form)) |
827 | return form; | |
0f2d19dd | 828 | tmp = SCM_CAR (form); |
2f0d1375 | 829 | if (scm_sym_quasiquote == tmp) |
0f2d19dd JB |
830 | { |
831 | depth++; | |
832 | goto label; | |
833 | } | |
2f0d1375 | 834 | if (scm_sym_unquote == tmp) |
0f2d19dd JB |
835 | { |
836 | --depth; | |
837 | label: | |
838 | form = SCM_CDR (form); | |
0c95b57d GB |
839 | SCM_ASSERT (SCM_ECONSP (form) && SCM_NULLP (SCM_CDR (form)), |
840 | form, SCM_ARG1, s_quasiquote); | |
0f2d19dd JB |
841 | if (0 == depth) |
842 | return evalcar (form, env); | |
843 | return scm_cons2 (tmp, iqq (SCM_CAR (form), env, depth), SCM_EOL); | |
844 | } | |
2f0d1375 | 845 | if (SCM_NIMP (tmp) && (scm_sym_uq_splicing == SCM_CAR (tmp))) |
0f2d19dd JB |
846 | { |
847 | tmp = SCM_CDR (tmp); | |
848 | if (0 == --edepth) | |
849 | return scm_append (scm_cons2 (evalcar (tmp, env), iqq (SCM_CDR (form), env, depth), SCM_EOL)); | |
850 | } | |
851 | return scm_cons (iqq (SCM_CAR (form), env, edepth), iqq (SCM_CDR (form), env, depth)); | |
852 | } | |
853 | ||
854 | /* Here are acros which return values rather than code. */ | |
855 | ||
a570e93a MD |
856 | SCM_SYNTAX (s_delay, "delay", scm_makmmacro, scm_m_delay); |
857 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); | |
1cc91f1b | 858 | |
0f2d19dd | 859 | SCM |
6e8d25a6 | 860 | scm_m_delay (SCM xorig, SCM env) |
0f2d19dd | 861 | { |
6cb702da | 862 | SCM_ASSYNT (scm_ilength (xorig) == 2, xorig, scm_s_expression, s_delay); |
a570e93a | 863 | return scm_cons2 (SCM_IM_DELAY, SCM_EOL, SCM_CDR (xorig)); |
0f2d19dd JB |
864 | } |
865 | ||
1cc91f1b | 866 | |
b8229a3b | 867 | SCM_SYNTAX(s_define, "define", scm_makmmacro, scm_m_define); |
2f0d1375 | 868 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
1cc91f1b | 869 | |
0f2d19dd | 870 | SCM |
6e8d25a6 | 871 | scm_m_define (SCM x, SCM env) |
0f2d19dd JB |
872 | { |
873 | SCM proc, arg1 = x; | |
874 | x = SCM_CDR (x); | |
6cb702da | 875 | /* SCM_ASSYNT(SCM_NULLP(env), x, "bad placement", s_define);*/ |
b8229a3b | 876 | SCM_ASSYNT (scm_ilength (x) >= 2, arg1, scm_s_expression, s_define); |
0f2d19dd JB |
877 | proc = SCM_CAR (x); |
878 | x = SCM_CDR (x); | |
0c95b57d | 879 | while (SCM_CONSP (proc)) |
0f2d19dd | 880 | { /* nested define syntax */ |
2f0d1375 | 881 | x = scm_cons (scm_cons2 (scm_sym_lambda, SCM_CDR (proc), x), SCM_EOL); |
0f2d19dd JB |
882 | proc = SCM_CAR (proc); |
883 | } | |
0c95b57d | 884 | SCM_ASSYNT (SCM_SYMBOLP (proc), |
b8229a3b MS |
885 | arg1, scm_s_variable, s_define); |
886 | SCM_ASSYNT (1 == scm_ilength (x), arg1, scm_s_expression, s_define); | |
0f2d19dd JB |
887 | if (SCM_TOP_LEVEL (env)) |
888 | { | |
889 | x = evalcar (x, env); | |
6dbd0af5 | 890 | #ifdef DEBUG_EXTENSIONS |
80ea260c MD |
891 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x)) |
892 | { | |
893 | arg1 = x; | |
894 | proc: | |
895 | if (SCM_CLOSUREP (arg1) | |
896 | /* Only the first definition determines the name. */ | |
2f0d1375 MD |
897 | && scm_procedure_property (arg1, scm_sym_name) == SCM_BOOL_F) |
898 | scm_set_procedure_property_x (arg1, scm_sym_name, proc); | |
80ea260c MD |
899 | else if (SCM_TYP16 (arg1) == scm_tc16_macro |
900 | && SCM_CDR (arg1) != arg1) | |
901 | { | |
902 | arg1 = SCM_CDR (arg1); | |
903 | goto proc; | |
904 | } | |
905 | } | |
6dbd0af5 | 906 | #endif |
6cb702da | 907 | arg1 = scm_sym2vcell (proc, scm_env_top_level (env), SCM_BOOL_T); |
0f2d19dd | 908 | #if 0 |
cf7c17e9 | 909 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
910 | if (SCM_NIMP (SCM_CDR (arg1)) && ((SCM) SCM_SNAME (SCM_CDR (arg1)) == proc) |
911 | && (SCM_CDR (arg1) != x)) | |
912 | scm_warn ("redefining built-in ", SCM_CHARS (proc)); | |
913 | else | |
914 | #endif | |
915 | if (5 <= scm_verbose && SCM_UNDEFINED != SCM_CDR (arg1)) | |
916 | scm_warn ("redefining ", SCM_CHARS (proc)); | |
0f2d19dd | 917 | #endif |
a23afe53 | 918 | SCM_SETCDR (arg1, x); |
0f2d19dd | 919 | #ifdef SICP |
2f0d1375 | 920 | return scm_cons2 (scm_sym_quote, SCM_CAR (arg1), SCM_EOL); |
0f2d19dd JB |
921 | #else |
922 | return SCM_UNSPECIFIED; | |
923 | #endif | |
924 | } | |
925 | return scm_cons2 (SCM_IM_DEFINE, proc, x); | |
926 | } | |
6dbd0af5 | 927 | |
0f2d19dd JB |
928 | /* end of acros */ |
929 | ||
26d5b9b4 | 930 | static SCM |
6e8d25a6 | 931 | scm_m_letrec1 (SCM op, SCM imm, SCM xorig, SCM env) |
0f2d19dd JB |
932 | { |
933 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
934 | char *what = SCM_CHARS (SCM_CAR (xorig)); | |
935 | SCM x = cdrx, proc, arg1; /* structure traversers */ | |
936 | SCM vars = SCM_EOL, inits = SCM_EOL, *initloc = &inits; | |
937 | ||
0f2d19dd | 938 | proc = SCM_CAR (x); |
6cb702da | 939 | ASRTSYNTAX (scm_ilength (proc) >= 1, scm_s_bindings); |
0f2d19dd JB |
940 | do |
941 | { | |
942 | /* vars scm_list reversed here, inits reversed at evaluation */ | |
943 | arg1 = SCM_CAR (proc); | |
6cb702da | 944 | ASRTSYNTAX (2 == scm_ilength (arg1), scm_s_bindings); |
0c95b57d | 945 | ASRTSYNTAX (SCM_SYMBOLP (SCM_CAR (arg1)), |
26d5b9b4 | 946 | scm_s_variable); |
0f2d19dd JB |
947 | vars = scm_cons (SCM_CAR (arg1), vars); |
948 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); | |
a23afe53 | 949 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd | 950 | } |
ff467021 | 951 | while (SCM_NIMP (proc = SCM_CDR (proc))); |
26d5b9b4 | 952 | |
3a3111a8 MD |
953 | return scm_cons2 (op, vars, |
954 | scm_cons (inits, scm_m_body (imm, SCM_CDR (x), what))); | |
0f2d19dd JB |
955 | } |
956 | ||
26d5b9b4 | 957 | SCM_SYNTAX(s_letrec, "letrec", scm_makmmacro, scm_m_letrec); |
2f0d1375 | 958 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
26d5b9b4 MD |
959 | |
960 | SCM | |
6e8d25a6 | 961 | scm_m_letrec (SCM xorig, SCM env) |
26d5b9b4 MD |
962 | { |
963 | SCM x = SCM_CDR (xorig); | |
964 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, s_letrec); | |
965 | ||
966 | if (SCM_NULLP (SCM_CAR (x))) /* null binding, let* faster */ | |
3a3111a8 MD |
967 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, |
968 | scm_m_body (SCM_IM_LETREC, | |
969 | SCM_CDR (x), | |
970 | s_letrec)), | |
26d5b9b4 MD |
971 | env); |
972 | else | |
973 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LETREC, xorig, env); | |
974 | } | |
1cc91f1b | 975 | |
b8229a3b | 976 | SCM_SYNTAX(s_let, "let", scm_makmmacro, scm_m_let); |
2f0d1375 | 977 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 978 | |
0f2d19dd | 979 | SCM |
6e8d25a6 | 980 | scm_m_let (SCM xorig, SCM env) |
0f2d19dd JB |
981 | { |
982 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
983 | SCM x = cdrx, proc, arg1, name; /* structure traversers */ | |
984 | SCM vars = SCM_EOL, inits = SCM_EOL, *varloc = &vars, *initloc = &inits; | |
985 | ||
b8229a3b | 986 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, s_let); |
0f2d19dd JB |
987 | proc = SCM_CAR (x); |
988 | if (SCM_NULLP (proc) | |
0c95b57d | 989 | || (SCM_CONSP (proc) |
26d5b9b4 MD |
990 | && SCM_CONSP (SCM_CAR (proc)) && SCM_NULLP (SCM_CDR (proc)))) |
991 | { | |
992 | /* null or single binding, let* is faster */ | |
3a3111a8 MD |
993 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), proc, |
994 | scm_m_body (SCM_IM_LET, | |
995 | SCM_CDR (x), | |
996 | s_let)), | |
26d5b9b4 MD |
997 | env); |
998 | } | |
999 | ||
b8229a3b | 1000 | SCM_ASSYNT (SCM_NIMP (proc), xorig, scm_s_bindings, s_let); |
26d5b9b4 MD |
1001 | if (SCM_CONSP (proc)) |
1002 | { | |
1003 | /* plain let, proc is <bindings> */ | |
1004 | return scm_m_letrec1 (SCM_IM_LET, SCM_IM_LET, xorig, env); | |
1005 | } | |
1006 | ||
0f2d19dd | 1007 | if (!SCM_SYMBOLP (proc)) |
b8229a3b | 1008 | scm_wta (xorig, scm_s_bindings, s_let); /* bad let */ |
0f2d19dd JB |
1009 | name = proc; /* named let, build equiv letrec */ |
1010 | x = SCM_CDR (x); | |
b8229a3b | 1011 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, s_let); |
26d5b9b4 | 1012 | proc = SCM_CAR (x); /* bindings list */ |
b8229a3b | 1013 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, s_let); |
ff467021 | 1014 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
1015 | { /* vars and inits both in order */ |
1016 | arg1 = SCM_CAR (proc); | |
b8229a3b | 1017 | SCM_ASSYNT (2 == scm_ilength (arg1), xorig, scm_s_bindings, s_let); |
0c95b57d | 1018 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), |
b8229a3b | 1019 | xorig, scm_s_variable, s_let); |
0f2d19dd | 1020 | *varloc = scm_cons (SCM_CAR (arg1), SCM_EOL); |
a23afe53 | 1021 | varloc = SCM_CDRLOC (*varloc); |
0f2d19dd | 1022 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 1023 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
1024 | proc = SCM_CDR (proc); |
1025 | } | |
26d5b9b4 | 1026 | |
2f0d1375 | 1027 | proc = scm_cons2 (scm_sym_lambda, vars, |
26d5b9b4 | 1028 | scm_m_body (SCM_IM_LET, SCM_CDR (x), "let")); |
2f0d1375 | 1029 | proc = scm_cons2 (scm_sym_let, scm_cons (scm_cons2 (name, proc, SCM_EOL), |
26d5b9b4 MD |
1030 | SCM_EOL), |
1031 | scm_acons (name, inits, SCM_EOL)); | |
1032 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LET, proc, env); | |
0f2d19dd JB |
1033 | } |
1034 | ||
1035 | ||
81123e6d MD |
1036 | SCM_SYNTAX (s_atapply,"@apply", scm_makmmacro, scm_m_apply); |
1037 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); | |
1038 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1cc91f1b | 1039 | |
0f2d19dd | 1040 | SCM |
6e8d25a6 | 1041 | scm_m_apply (SCM xorig, SCM env) |
0f2d19dd | 1042 | { |
6cb702da | 1043 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, |
b8229a3b | 1044 | xorig, scm_s_expression, s_atapply); |
0f2d19dd JB |
1045 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
1046 | } | |
1047 | ||
b8229a3b MS |
1048 | |
1049 | SCM_SYNTAX(s_atcall_cc,"@call-with-current-continuation", scm_makmmacro, scm_m_cont); | |
2f0d1375 | 1050 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc,s_atcall_cc); |
0f2d19dd | 1051 | |
1cc91f1b | 1052 | |
0f2d19dd | 1053 | SCM |
6e8d25a6 | 1054 | scm_m_cont (SCM xorig, SCM env) |
0f2d19dd | 1055 | { |
6cb702da | 1056 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
b8229a3b | 1057 | xorig, scm_s_expression, s_atcall_cc); |
3a3111a8 | 1058 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
0f2d19dd JB |
1059 | } |
1060 | ||
73b64342 MD |
1061 | /* Multi-language support */ |
1062 | ||
1063 | SCM scm_nil; | |
1064 | SCM scm_t; | |
1065 | ||
1066 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_makmmacro, scm_m_nil_cond); | |
1067 | ||
1068 | SCM | |
1069 | scm_m_nil_cond (SCM xorig, SCM env) | |
1070 | { | |
1071 | int len = scm_ilength (SCM_CDR (xorig)); | |
1072 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, xorig, | |
1073 | scm_s_expression, "nil-cond"); | |
1074 | return scm_cons (SCM_IM_NIL_COND, SCM_CDR (xorig)); | |
1075 | } | |
1076 | ||
1077 | SCM_SYNTAX (s_nil_ify, "nil-ify", scm_makmmacro, scm_m_nil_ify); | |
1078 | ||
1079 | SCM | |
1080 | scm_m_nil_ify (SCM xorig, SCM env) | |
1081 | { | |
1082 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1083 | xorig, scm_s_expression, "nil-ify"); | |
1084 | return scm_cons (SCM_IM_NIL_IFY, SCM_CDR (xorig)); | |
1085 | } | |
1086 | ||
1087 | SCM_SYNTAX (s_t_ify, "t-ify", scm_makmmacro, scm_m_t_ify); | |
1088 | ||
1089 | SCM | |
1090 | scm_m_t_ify (SCM xorig, SCM env) | |
1091 | { | |
1092 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1093 | xorig, scm_s_expression, "t-ify"); | |
1094 | return scm_cons (SCM_IM_T_IFY, SCM_CDR (xorig)); | |
1095 | } | |
1096 | ||
1097 | SCM_SYNTAX (s_0_cond, "0-cond", scm_makmmacro, scm_m_0_cond); | |
1098 | ||
1099 | SCM | |
1100 | scm_m_0_cond (SCM xorig, SCM env) | |
1101 | { | |
1102 | int len = scm_ilength (SCM_CDR (xorig)); | |
1103 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, xorig, | |
1104 | scm_s_expression, "0-cond"); | |
1105 | return scm_cons (SCM_IM_0_COND, SCM_CDR (xorig)); | |
1106 | } | |
1107 | ||
1108 | SCM_SYNTAX (s_0_ify, "0-ify", scm_makmmacro, scm_m_0_ify); | |
1109 | ||
1110 | SCM | |
1111 | scm_m_0_ify (SCM xorig, SCM env) | |
1112 | { | |
1113 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1114 | xorig, scm_s_expression, "0-ify"); | |
1115 | return scm_cons (SCM_IM_0_IFY, SCM_CDR (xorig)); | |
1116 | } | |
1117 | ||
1118 | SCM_SYNTAX (s_1_ify, "1-ify", scm_makmmacro, scm_m_1_ify); | |
1119 | ||
1120 | SCM | |
1121 | scm_m_1_ify (SCM xorig, SCM env) | |
1122 | { | |
1123 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1124 | xorig, scm_s_expression, "1-ify"); | |
1125 | return scm_cons (SCM_IM_1_IFY, SCM_CDR (xorig)); | |
1126 | } | |
1127 | ||
1128 | SCM_SYNTAX (s_atfop, "@fop", scm_makmmacro, scm_m_atfop); | |
1129 | ||
1130 | SCM | |
1131 | scm_m_atfop (SCM xorig, SCM env) | |
1132 | { | |
1133 | SCM x = SCM_CDR (xorig), vcell; | |
1134 | SCM_ASSYNT (scm_ilength (x) >= 1, xorig, scm_s_expression, "@fop"); | |
1135 | vcell = scm_symbol_fref (SCM_CAR (x)); | |
0c95b57d | 1136 | SCM_ASSYNT (SCM_CONSP (vcell), x, |
73b64342 MD |
1137 | "Symbol's function definition is void", NULL); |
1138 | SCM_SETCAR (x, vcell + 1); | |
1139 | return x; | |
1140 | } | |
1141 | ||
1142 | SCM_SYNTAX (s_atbind, "@bind", scm_makmmacro, scm_m_atbind); | |
1143 | ||
1144 | SCM | |
1145 | scm_m_atbind (SCM xorig, SCM env) | |
1146 | { | |
1147 | SCM x = SCM_CDR (xorig); | |
1148 | SCM_ASSYNT (scm_ilength (x) > 1, xorig, scm_s_expression, "@bind"); | |
1149 | ||
1150 | if (SCM_IMP (env)) | |
1151 | env = SCM_BOOL_F; | |
1152 | else | |
1153 | { | |
1154 | while (SCM_NIMP (SCM_CDR (env))) | |
1155 | env = SCM_CDR (env); | |
1156 | env = SCM_CAR (env); | |
1157 | if (SCM_CONSP (env)) | |
1158 | env = SCM_BOOL_F; | |
1159 | } | |
1160 | ||
1161 | x = SCM_CAR (x); | |
1162 | while (SCM_NIMP (x)) | |
1163 | { | |
1164 | SCM_SETCAR (x, scm_sym2vcell (SCM_CAR (x), env, SCM_BOOL_T) + 1); | |
1165 | x = SCM_CDR (x); | |
1166 | } | |
1167 | return scm_cons (SCM_IM_BIND, SCM_CDR (xorig)); | |
1168 | } | |
73b64342 | 1169 | |
26d5b9b4 MD |
1170 | SCM |
1171 | scm_m_expand_body (SCM xorig, SCM env) | |
1172 | { | |
1173 | SCM form, x = SCM_CDR (xorig), defs = SCM_EOL; | |
1174 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; | |
1175 | ||
1176 | while (SCM_NIMP (x)) | |
1177 | { | |
1178 | form = SCM_CAR (x); | |
1179 | if (SCM_IMP (form) || SCM_NCONSP (form)) | |
1180 | break; | |
1181 | if (SCM_IMP (SCM_CAR (form))) | |
1182 | break; | |
1183 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1184 | break; | |
1185 | ||
3a3111a8 MD |
1186 | form = scm_macroexp (scm_cons_source (form, |
1187 | SCM_CAR (form), | |
1188 | SCM_CDR (form)), | |
1189 | env); | |
26d5b9b4 MD |
1190 | |
1191 | if (SCM_IM_DEFINE == SCM_CAR (form)) | |
1192 | { | |
1193 | defs = scm_cons (SCM_CDR (form), defs); | |
1194 | x = SCM_CDR(x); | |
1195 | } | |
1196 | else if (SCM_NIMP(defs)) | |
1197 | { | |
1198 | break; | |
1199 | } | |
1200 | else if (SCM_IM_BEGIN == SCM_CAR (form)) | |
1201 | { | |
1202 | x = scm_append (scm_cons2 (SCM_CDR (form), SCM_CDR (x), SCM_EOL)); | |
1203 | } | |
1204 | else | |
1205 | { | |
1206 | x = scm_cons (form, SCM_CDR(x)); | |
1207 | break; | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | SCM_ASSYNT (SCM_NIMP (x), SCM_CDR (xorig), scm_s_body, what); | |
1212 | if (SCM_NIMP (defs)) | |
1213 | { | |
1214 | x = scm_cons (scm_m_letrec1 (SCM_IM_LETREC, | |
1215 | SCM_IM_DEFINE, | |
2f0d1375 | 1216 | scm_cons2 (scm_sym_define, defs, x), |
26d5b9b4 MD |
1217 | env), |
1218 | SCM_EOL); | |
1219 | } | |
1220 | ||
1221 | SCM_DEFER_INTS; | |
1222 | SCM_SETCAR (xorig, SCM_CAR (x)); | |
1223 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
1224 | SCM_ALLOW_INTS; | |
1225 | ||
1226 | return xorig; | |
1227 | } | |
1228 | ||
1229 | SCM | |
1230 | scm_macroexp (SCM x, SCM env) | |
1231 | { | |
1232 | SCM res, proc; | |
1233 | ||
1234 | /* Don't bother to produce error messages here. We get them when we | |
1235 | eventually execute the code for real. */ | |
1236 | ||
1237 | macro_tail: | |
1238 | if (SCM_IMP (SCM_CAR (x)) || !SCM_SYMBOLP (SCM_CAR (x))) | |
1239 | return x; | |
1240 | ||
1241 | #ifdef USE_THREADS | |
1242 | { | |
1243 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1244 | if (proc_ptr == NULL) | |
1245 | { | |
1246 | /* We have lost the race. */ | |
1247 | goto macro_tail; | |
1248 | } | |
1249 | proc = *proc_ptr; | |
1250 | } | |
1251 | #else | |
1252 | proc = *scm_lookupcar (x, env, 0); | |
1253 | #endif | |
1254 | ||
1255 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1256 | special forms and should not be evaluated here. */ | |
1257 | ||
1258 | if (SCM_IMP (proc) | |
1259 | || scm_tc16_macro != SCM_TYP16 (proc) | |
1260 | || (int) (SCM_CAR (proc) >> 16) != 2) | |
1261 | return x; | |
1262 | ||
1263 | unmemocar (x, env); | |
1264 | res = scm_apply (SCM_CDR (proc), x, scm_cons (env, scm_listofnull)); | |
1265 | ||
1266 | if (scm_ilength (res) <= 0) | |
1267 | res = scm_cons2 (SCM_IM_BEGIN, res, SCM_EOL); | |
1268 | ||
26d5b9b4 MD |
1269 | SCM_DEFER_INTS; |
1270 | SCM_SETCAR (x, SCM_CAR (res)); | |
1271 | SCM_SETCDR (x, SCM_CDR (res)); | |
1272 | SCM_ALLOW_INTS; | |
1273 | ||
1274 | goto macro_tail; | |
1275 | } | |
73b64342 | 1276 | |
6dbd0af5 MD |
1277 | /* scm_unmemocopy takes a memoized expression together with its |
1278 | * environment and rewrites it to its original form. Thus, it is the | |
1279 | * inversion of the rewrite rules above. The procedure is not | |
1280 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1281 | * code of a closure, in scm_procedure_source, in display_frame when |
1282 | * generating the source for a stackframe in a backtrace, and in | |
1283 | * display_expression. | |
6dbd0af5 MD |
1284 | */ |
1285 | ||
26d5b9b4 MD |
1286 | /* We should introduce an anti-macro interface so that it is possible |
1287 | * to plug in transformers in both directions from other compilation | |
1288 | * units. unmemocopy could then dispatch to anti-macro transformers. | |
1289 | * (Those transformers could perhaps be written in slightly more | |
1290 | * readable style... :) | |
1291 | */ | |
1292 | ||
6dbd0af5 | 1293 | static SCM |
1bbd0b84 | 1294 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1295 | { |
1296 | SCM ls, z; | |
1297 | #ifdef DEBUG_EXTENSIONS | |
1298 | SCM p; | |
1299 | #endif | |
1300 | if (SCM_NCELLP (x) || SCM_NECONSP (x)) | |
1301 | return x; | |
1302 | #ifdef DEBUG_EXTENSIONS | |
1303 | p = scm_whash_lookup (scm_source_whash, x); | |
1304 | #endif | |
1305 | switch (SCM_TYP7 (x)) | |
1306 | { | |
1307 | case (127 & SCM_IM_AND): | |
2f0d1375 | 1308 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1309 | break; |
1310 | case (127 & SCM_IM_BEGIN): | |
2f0d1375 | 1311 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1312 | break; |
1313 | case (127 & SCM_IM_CASE): | |
2f0d1375 | 1314 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1315 | break; |
1316 | case (127 & SCM_IM_COND): | |
2f0d1375 | 1317 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1318 | break; |
1319 | case (127 & SCM_IM_DO): | |
2f0d1375 | 1320 | ls = scm_cons (scm_sym_do, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1321 | goto transform; |
1322 | case (127 & SCM_IM_IF): | |
2f0d1375 | 1323 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1324 | break; |
1325 | case (127 & SCM_IM_LET): | |
2f0d1375 | 1326 | ls = scm_cons (scm_sym_let, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1327 | goto transform; |
1328 | case (127 & SCM_IM_LETREC): | |
1329 | { | |
1330 | SCM f, v, e, s; | |
2f0d1375 | 1331 | ls = scm_cons (scm_sym_letrec, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1332 | transform: |
1333 | x = SCM_CDR (x); | |
26d5b9b4 | 1334 | /* binding names */ |
6dbd0af5 MD |
1335 | f = v = SCM_CAR (x); |
1336 | x = SCM_CDR (x); | |
e2806c10 | 1337 | z = EXTEND_ENV (f, SCM_EOL, env); |
26d5b9b4 | 1338 | /* inits */ |
6dbd0af5 | 1339 | e = scm_reverse (unmemocopy (SCM_CAR (x), |
2f0d1375 | 1340 | SCM_CAR (ls) == scm_sym_letrec ? z : env)); |
6dbd0af5 | 1341 | env = z; |
26d5b9b4 | 1342 | /* increments */ |
2f0d1375 | 1343 | s = SCM_CAR (ls) == scm_sym_do |
6dbd0af5 MD |
1344 | ? scm_reverse (unmemocopy (SCM_CDR (SCM_CDR (SCM_CDR (x))), env)) |
1345 | : f; | |
26d5b9b4 | 1346 | /* build transformed binding list */ |
6dbd0af5 MD |
1347 | z = SCM_EOL; |
1348 | do | |
1349 | { | |
1350 | z = scm_acons (SCM_CAR (v), | |
1351 | scm_cons (SCM_CAR (e), | |
1352 | SCM_CAR (s) == SCM_CAR (v) | |
1353 | ? SCM_EOL | |
1354 | : scm_cons (SCM_CAR (s), SCM_EOL)), | |
1355 | z); | |
1356 | v = SCM_CDR (v); | |
1357 | e = SCM_CDR (e); | |
1358 | s = SCM_CDR (s); | |
1359 | } | |
ff467021 | 1360 | while (SCM_NIMP (v)); |
a23afe53 MD |
1361 | z = scm_cons (z, SCM_UNSPECIFIED); |
1362 | SCM_SETCDR (ls, z); | |
2f0d1375 | 1363 | if (SCM_CAR (ls) == scm_sym_do) |
6dbd0af5 MD |
1364 | { |
1365 | x = SCM_CDR (x); | |
26d5b9b4 | 1366 | /* test clause */ |
a23afe53 | 1367 | SCM_SETCDR (z, scm_cons (unmemocopy (SCM_CAR (x), env), |
6dbd0af5 | 1368 | SCM_UNSPECIFIED)); |
a23afe53 MD |
1369 | z = SCM_CDR (z); |
1370 | x = (SCM) (SCM_CARLOC (SCM_CDR (x)) - 1); | |
26d5b9b4 MD |
1371 | /* body forms are now to be found in SCM_CDR (x) |
1372 | (this is how *real* code look like! :) */ | |
6dbd0af5 MD |
1373 | } |
1374 | break; | |
1375 | } | |
1376 | case (127 & SCM_IM_LETSTAR): | |
1377 | { | |
1378 | SCM b, y; | |
1379 | x = SCM_CDR (x); | |
1380 | b = SCM_CAR (x); | |
1381 | y = SCM_EOL; | |
1382 | if SCM_IMP (b) | |
1383 | { | |
e2806c10 | 1384 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1385 | goto letstar; |
1386 | } | |
1387 | y = z = scm_acons (SCM_CAR (b), | |
1388 | unmemocar ( | |
1389 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), | |
1390 | SCM_UNSPECIFIED); | |
e2806c10 | 1391 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1392 | b = SCM_CDR (SCM_CDR (b)); |
1393 | if (SCM_IMP (b)) | |
1394 | { | |
1395 | SCM_SETCDR (y, SCM_EOL); | |
2f0d1375 | 1396 | ls = scm_cons (scm_sym_let, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1397 | break; |
1398 | } | |
1399 | do | |
1400 | { | |
a23afe53 MD |
1401 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1402 | unmemocar ( | |
6dbd0af5 | 1403 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), |
a23afe53 MD |
1404 | SCM_UNSPECIFIED)); |
1405 | z = SCM_CDR (z); | |
e2806c10 | 1406 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1407 | b = SCM_CDR (SCM_CDR (b)); |
1408 | } | |
ff467021 | 1409 | while (SCM_NIMP (b)); |
a23afe53 | 1410 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1411 | letstar: |
2f0d1375 | 1412 | ls = scm_cons (scm_sym_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1413 | break; |
1414 | } | |
1415 | case (127 & SCM_IM_OR): | |
2f0d1375 | 1416 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1417 | break; |
1418 | case (127 & SCM_IM_LAMBDA): | |
1419 | x = SCM_CDR (x); | |
2f0d1375 | 1420 | ls = scm_cons (scm_sym_lambda, |
6dbd0af5 | 1421 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED)); |
e2806c10 | 1422 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 MD |
1423 | break; |
1424 | case (127 & SCM_IM_QUOTE): | |
2f0d1375 | 1425 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1426 | break; |
89efbff4 MD |
1427 | case (127 & SCM_IM_SET_X): |
1428 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); | |
6dbd0af5 MD |
1429 | break; |
1430 | case (127 & SCM_IM_DEFINE): | |
1431 | { | |
1432 | SCM n; | |
1433 | x = SCM_CDR (x); | |
2f0d1375 | 1434 | ls = scm_cons (scm_sym_define, |
6dbd0af5 MD |
1435 | z = scm_cons (n = SCM_CAR (x), SCM_UNSPECIFIED)); |
1436 | if (SCM_NNULLP (env)) | |
a23afe53 | 1437 | SCM_SETCAR (SCM_CAR (env), scm_cons (n, SCM_CAR (SCM_CAR (env)))); |
6dbd0af5 MD |
1438 | break; |
1439 | } | |
1440 | case (127 & SCM_MAKISYM (0)): | |
1441 | z = SCM_CAR (x); | |
1442 | if (!SCM_ISYMP (z)) | |
1443 | goto unmemo; | |
ff467021 | 1444 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 MD |
1445 | { |
1446 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2f0d1375 | 1447 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1448 | goto loop; |
1449 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1450 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 1451 | goto loop; |
a570e93a MD |
1452 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
1453 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
1454 | x = SCM_CDR (x); | |
1455 | goto loop; | |
6dbd0af5 | 1456 | default: |
fa888178 | 1457 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1458 | } |
1459 | unmemo: | |
1460 | default: | |
1461 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1462 | SCM_UNSPECIFIED), | |
1463 | env); | |
1464 | } | |
1465 | loop: | |
1466 | while (SCM_CELLP (x = SCM_CDR (x)) && SCM_ECONSP (x)) | |
a23afe53 | 1467 | { |
26d5b9b4 MD |
1468 | if (SCM_IMP (SCM_CAR (x)) && SCM_ISYMP (SCM_CAR (x))) |
1469 | /* skip body markers */ | |
1470 | continue; | |
a23afe53 MD |
1471 | SCM_SETCDR (z, unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), |
1472 | SCM_UNSPECIFIED), | |
1473 | env)); | |
1474 | z = SCM_CDR (z); | |
1475 | } | |
1476 | SCM_SETCDR (z, x); | |
6dbd0af5 MD |
1477 | #ifdef DEBUG_EXTENSIONS |
1478 | if (SCM_NFALSEP (p)) | |
1479 | scm_whash_insert (scm_source_whash, ls, p); | |
1480 | #endif | |
1481 | return ls; | |
1482 | } | |
1483 | ||
1cc91f1b | 1484 | |
6dbd0af5 | 1485 | SCM |
6e8d25a6 | 1486 | scm_unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1487 | { |
1488 | if (SCM_NNULLP (env)) | |
1489 | /* Make a copy of the lowest frame to protect it from | |
1490 | modifications by SCM_IM_DEFINE */ | |
1491 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1492 | else | |
1493 | return unmemocopy (x, env); | |
1494 | } | |
1495 | ||
cf7c17e9 | 1496 | #ifndef SCM_RECKLESS |
1cc91f1b | 1497 | |
0f2d19dd | 1498 | int |
6e8d25a6 | 1499 | scm_badargsp (SCM formals, SCM args) |
0f2d19dd | 1500 | { |
ff467021 | 1501 | while (SCM_NIMP (formals)) |
0f2d19dd | 1502 | { |
ff467021 JB |
1503 | if (SCM_NCONSP (formals)) |
1504 | return 0; | |
1505 | if (SCM_IMP(args)) | |
1506 | return 1; | |
0f2d19dd JB |
1507 | formals = SCM_CDR (formals); |
1508 | args = SCM_CDR (args); | |
1509 | } | |
1510 | return SCM_NNULLP (args) ? 1 : 0; | |
1511 | } | |
1512 | #endif | |
1513 | ||
1514 | ||
1515 | \f | |
6dbd0af5 | 1516 | SCM |
6e8d25a6 | 1517 | scm_eval_args (SCM l, SCM env, SCM proc) |
6dbd0af5 | 1518 | { |
680ed4a8 | 1519 | SCM results = SCM_EOL, *lloc = &results, res; |
6dbd0af5 MD |
1520 | while (SCM_NIMP (l)) |
1521 | { | |
cf7c17e9 | 1522 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1523 | if (SCM_IMP (l)) |
1524 | goto wrongnumargs; | |
1525 | else if (SCM_CONSP (l)) | |
1526 | { | |
1527 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1528 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1529 | else |
1530 | res = EVALCELLCAR (l, env); | |
1531 | } | |
1532 | else if (SCM_TYP3 (l) == 1) | |
1533 | { | |
1534 | if ((res = SCM_GLOC_VAL (SCM_CAR (l))) == 0) | |
1535 | res = SCM_CAR (l); /* struct planted in code */ | |
1536 | } | |
1537 | else | |
1538 | goto wrongnumargs; | |
1539 | #else | |
1540 | res = EVALCAR (l, env); | |
1541 | #endif | |
1542 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1543 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1544 | l = SCM_CDR (l); |
1545 | } | |
cf7c17e9 | 1546 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1547 | if (SCM_NNULLP (l)) |
1548 | { | |
1549 | wrongnumargs: | |
1550 | scm_wrong_num_args (proc); | |
1551 | } | |
1552 | #endif | |
1553 | return results; | |
6dbd0af5 | 1554 | } |
c4ac4d88 | 1555 | |
9de33deb MD |
1556 | SCM |
1557 | scm_eval_body (SCM code, SCM env) | |
1558 | { | |
1559 | SCM next; | |
1560 | again: | |
1561 | next = code; | |
1562 | while (SCM_NNULLP (next = SCM_CDR (next))) | |
1563 | { | |
1564 | if (SCM_IMP (SCM_CAR (code))) | |
1565 | { | |
1566 | if (SCM_ISYMP (SCM_CAR (code))) | |
1567 | { | |
1568 | code = scm_m_expand_body (code, env); | |
1569 | goto again; | |
1570 | } | |
1571 | } | |
1572 | else | |
1573 | SCM_XEVAL (SCM_CAR (code), env); | |
1574 | code = next; | |
1575 | } | |
1576 | return SCM_XEVALCAR (code, env); | |
1577 | } | |
1578 | ||
c4ac4d88 | 1579 | |
0f2d19dd JB |
1580 | #endif /* !DEVAL */ |
1581 | ||
6dbd0af5 MD |
1582 | |
1583 | /* SECTION: This code is specific for the debugging support. One | |
1584 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1585 | * defined. | |
1586 | */ | |
1587 | ||
1588 | #ifndef DEVAL | |
1589 | ||
1590 | #define SCM_APPLY scm_apply | |
1591 | #define PREP_APPLY(proc, args) | |
1592 | #define ENTER_APPLY | |
1593 | #define RETURN(x) return x; | |
b7ff98dd MD |
1594 | #ifdef STACK_CHECKING |
1595 | #ifndef NO_CEVAL_STACK_CHECKING | |
1596 | #define EVAL_STACK_CHECKING | |
1597 | #endif | |
6dbd0af5 MD |
1598 | #endif |
1599 | ||
1600 | #else /* !DEVAL */ | |
1601 | ||
0f2d19dd JB |
1602 | #undef SCM_CEVAL |
1603 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1604 | #undef SCM_APPLY | |
1605 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1606 | #undef PREP_APPLY |
1607 | #define PREP_APPLY(p, l) \ | |
1608 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1609 | #undef ENTER_APPLY | |
1610 | #define ENTER_APPLY \ | |
d3a6bc94 | 1611 | do { \ |
b7ff98dd | 1612 | SCM_SET_ARGSREADY (debug);\ |
b6d75948 | 1613 | if (CHECK_APPLY && SCM_TRAPS_P)\ |
b7ff98dd | 1614 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1615 | {\ |
156dcb09 | 1616 | SCM tmp, tail = SCM_BOOL(SCM_TRACED_FRAME_P (debug)); \ |
c6a4fbce | 1617 | SCM_SET_TRACED_FRAME (debug); \ |
b7ff98dd | 1618 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1619 | {\ |
c0ab1b8d | 1620 | tmp = scm_make_debugobj (&debug);\ |
2f0d1375 | 1621 | scm_ithrow (scm_sym_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
b6d75948 | 1622 | }\ |
6dbd0af5 MD |
1623 | else\ |
1624 | {\ | |
1625 | scm_make_cont (&tmp);\ | |
ca6ef71a | 1626 | if (!setjmp (SCM_JMPBUF (tmp)))\ |
2f0d1375 | 1627 | scm_ithrow (scm_sym_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
6dbd0af5 MD |
1628 | }\ |
1629 | }\ | |
d3a6bc94 | 1630 | } while (0) |
0f2d19dd JB |
1631 | #undef RETURN |
1632 | #define RETURN(e) {proc = (e); goto exit;} | |
b7ff98dd MD |
1633 | #ifdef STACK_CHECKING |
1634 | #ifndef EVAL_STACK_CHECKING | |
1635 | #define EVAL_STACK_CHECKING | |
1636 | #endif | |
6dbd0af5 MD |
1637 | #endif |
1638 | ||
1639 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1640 | * *fixme*: Although efficiency is important here, this state variable | |
1641 | * should probably not be a global. It should be related to the | |
1642 | * current repl. | |
1643 | */ | |
1644 | ||
1cc91f1b | 1645 | |
1bbd0b84 | 1646 | SCM (*scm_ceval_ptr) (SCM x, SCM env); |
0f2d19dd | 1647 | |
1646d37b | 1648 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1649 | * information stack frame. It is accessed very often from the |
1650 | * debugging evaluator, so it should probably not be indirectly | |
1651 | * addressed. Better to save and restore it from the current root at | |
1652 | * any stack swaps. | |
1653 | */ | |
1654 | ||
1646d37b MD |
1655 | #ifndef USE_THREADS |
1656 | scm_debug_frame *scm_last_debug_frame; | |
1657 | #endif | |
6dbd0af5 MD |
1658 | |
1659 | /* scm_debug_eframe_size is the number of slots available for pseudo | |
1660 | * stack frames at each real stack frame. | |
1661 | */ | |
1662 | ||
1663 | int scm_debug_eframe_size; | |
1664 | ||
b7ff98dd | 1665 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 1666 | |
a74145b8 MD |
1667 | int scm_eval_stack; |
1668 | ||
33b97402 | 1669 | scm_option scm_eval_opts[] = { |
a74145b8 | 1670 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
1671 | }; |
1672 | ||
6dbd0af5 | 1673 | scm_option scm_debug_opts[] = { |
b7ff98dd MD |
1674 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1675 | "*Flyweight representation of the stack at traps." }, | |
1676 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1677 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1678 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1679 | "Record procedure names at definition." }, | |
1680 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1681 | "Display backtrace in anti-chronological order." }, | |
274dc5fd | 1682 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, |
4e646a03 MD |
1683 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1684 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1685 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1686 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1687 | "Maximal number of stored backtrace frames." }, | |
1688 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1689 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1690 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
a74145b8 | 1691 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." } |
6dbd0af5 MD |
1692 | }; |
1693 | ||
1694 | scm_option scm_evaluator_trap_table[] = { | |
b6d75948 | 1695 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
1696 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1697 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
1698 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." } | |
6dbd0af5 MD |
1699 | }; |
1700 | ||
a1ec6916 | 1701 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
1bbd0b84 GB |
1702 | (SCM setting), |
1703 | "") | |
1704 | #define FUNC_NAME s_scm_eval_options_interface | |
33b97402 MD |
1705 | { |
1706 | SCM ans; | |
1707 | SCM_DEFER_INTS; | |
1708 | ans = scm_options (setting, | |
1709 | scm_eval_opts, | |
1710 | SCM_N_EVAL_OPTIONS, | |
1bbd0b84 | 1711 | FUNC_NAME); |
a74145b8 | 1712 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
1713 | SCM_ALLOW_INTS; |
1714 | return ans; | |
1715 | } | |
1bbd0b84 | 1716 | #undef FUNC_NAME |
33b97402 | 1717 | |
a1ec6916 | 1718 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
1bbd0b84 GB |
1719 | (SCM setting), |
1720 | "") | |
1721 | #define FUNC_NAME s_scm_evaluator_traps | |
33b97402 MD |
1722 | { |
1723 | SCM ans; | |
1724 | SCM_DEFER_INTS; | |
1725 | ans = scm_options (setting, | |
1726 | scm_evaluator_trap_table, | |
1727 | SCM_N_EVALUATOR_TRAPS, | |
1bbd0b84 | 1728 | FUNC_NAME); |
33b97402 | 1729 | SCM_RESET_DEBUG_MODE; |
bfc69694 | 1730 | SCM_ALLOW_INTS; |
33b97402 MD |
1731 | return ans; |
1732 | } | |
1bbd0b84 | 1733 | #undef FUNC_NAME |
33b97402 | 1734 | |
6dbd0af5 | 1735 | SCM |
6e8d25a6 | 1736 | scm_deval_args (SCM l, SCM env, SCM proc, SCM *lloc) |
0f2d19dd | 1737 | { |
680ed4a8 | 1738 | SCM *results = lloc, res; |
0f2d19dd JB |
1739 | while (SCM_NIMP (l)) |
1740 | { | |
cf7c17e9 | 1741 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1742 | if (SCM_IMP (l)) |
1743 | goto wrongnumargs; | |
1744 | else if (SCM_CONSP (l)) | |
1745 | { | |
1746 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1747 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1748 | else |
1749 | res = EVALCELLCAR (l, env); | |
1750 | } | |
1751 | else if (SCM_TYP3 (l) == 1) | |
1752 | { | |
1753 | if ((res = SCM_GLOC_VAL (SCM_CAR (l))) == 0) | |
1754 | res = SCM_CAR (l); /* struct planted in code */ | |
1755 | } | |
1756 | else | |
1757 | goto wrongnumargs; | |
1758 | #else | |
1759 | res = EVALCAR (l, env); | |
1760 | #endif | |
1761 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1762 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1763 | l = SCM_CDR (l); |
1764 | } | |
cf7c17e9 | 1765 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1766 | if (SCM_NNULLP (l)) |
1767 | { | |
1768 | wrongnumargs: | |
1769 | scm_wrong_num_args (proc); | |
1770 | } | |
1771 | #endif | |
1772 | return *results; | |
0f2d19dd JB |
1773 | } |
1774 | ||
6dbd0af5 MD |
1775 | #endif /* !DEVAL */ |
1776 | ||
1777 | ||
1778 | /* SECTION: Some local definitions for the evaluator. | |
1779 | */ | |
1780 | ||
1781 | #ifndef DEVAL | |
1782 | #ifdef SCM_FLOATS | |
1783 | #define CHECK_EQVISH(A,B) (((A) == (B)) || (SCM_NFALSEP (scm_eqv_p ((A), (B))))) | |
1784 | #else | |
1785 | #define CHECK_EQVISH(A,B) ((A) == (B)) | |
1786 | #endif | |
1787 | #endif /* DEVAL */ | |
1788 | ||
399dedcc | 1789 | #define BUILTIN_RPASUBR /* Handle rpsubrs and asubrs without calling apply */ |
6dbd0af5 MD |
1790 | |
1791 | /* SECTION: This is the evaluator. Like any real monster, it has | |
1792 | * three heads. This code is compiled twice. | |
1793 | */ | |
1794 | ||
0f2d19dd | 1795 | #if 0 |
1cc91f1b | 1796 | |
0f2d19dd | 1797 | SCM |
1bbd0b84 | 1798 | scm_ceval (SCM x, SCM env) |
0f2d19dd JB |
1799 | {} |
1800 | #endif | |
1801 | #if 0 | |
1cc91f1b | 1802 | |
0f2d19dd | 1803 | SCM |
1bbd0b84 | 1804 | scm_deval (SCM x, SCM env) |
0f2d19dd JB |
1805 | {} |
1806 | #endif | |
1807 | ||
6dbd0af5 | 1808 | SCM |
1bbd0b84 | 1809 | SCM_CEVAL (SCM x, SCM env) |
0f2d19dd JB |
1810 | { |
1811 | union | |
1812 | { | |
1813 | SCM *lloc; | |
1814 | SCM arg1; | |
f8769b1d | 1815 | } t; |
6dbd0af5 MD |
1816 | SCM proc, arg2; |
1817 | #ifdef DEVAL | |
c0ab1b8d JB |
1818 | scm_debug_frame debug; |
1819 | scm_debug_info *debug_info_end; | |
1646d37b | 1820 | debug.prev = scm_last_debug_frame; |
6dbd0af5 | 1821 | debug.status = scm_debug_eframe_size; |
04b6c081 MD |
1822 | /* |
1823 | * The debug.vect contains twice as much scm_debug_info frames as the | |
1824 | * user has specified with (debug-set! frames <n>). | |
1825 | * | |
1826 | * Even frames are eval frames, odd frames are apply frames. | |
1827 | */ | |
c0ab1b8d JB |
1828 | debug.vect = (scm_debug_info *) alloca (scm_debug_eframe_size |
1829 | * sizeof (debug.vect[0])); | |
1830 | debug.info = debug.vect; | |
1831 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1832 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1833 | #endif |
b7ff98dd | 1834 | #ifdef EVAL_STACK_CHECKING |
6f13f9cb MD |
1835 | if (scm_stack_checking_enabled_p |
1836 | && SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc)) | |
6dbd0af5 | 1837 | { |
b7ff98dd | 1838 | #ifdef DEVAL |
6dbd0af5 MD |
1839 | debug.info->e.exp = x; |
1840 | debug.info->e.env = env; | |
b7ff98dd | 1841 | #endif |
6dbd0af5 MD |
1842 | scm_report_stack_overflow (); |
1843 | } | |
1844 | #endif | |
1845 | #ifdef DEVAL | |
1846 | goto start; | |
1847 | #endif | |
1848 | loopnoap: | |
1849 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1850 | loop: | |
1851 | #ifdef DEVAL | |
b7ff98dd MD |
1852 | SCM_CLEAR_ARGSREADY (debug); |
1853 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1854 | --debug.info; |
04b6c081 MD |
1855 | /* |
1856 | * In theory, this should be the only place where it is necessary to | |
1857 | * check for space in debug.vect since both eval frames and | |
1858 | * available space are even. | |
1859 | * | |
1860 | * For this to be the case, however, it is necessary that primitive | |
1861 | * special forms which jump back to `loop', `begin' or some similar | |
1862 | * label call PREP_APPLY. A convenient way to do this is to jump to | |
1863 | * `loopnoap' or `cdrxnoap'. | |
1864 | */ | |
c0ab1b8d | 1865 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1866 | { |
b7ff98dd | 1867 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1868 | debug.info -= 2; |
1869 | } | |
1870 | start: | |
1871 | debug.info->e.exp = x; | |
1872 | debug.info->e.env = env; | |
b6d75948 | 1873 | if (CHECK_ENTRY && SCM_TRAPS_P) |
b7ff98dd | 1874 | if (SCM_ENTER_FRAME_P || (SCM_BREAKPOINTS_P && SRCBRKP (x))) |
6dbd0af5 | 1875 | { |
156dcb09 | 1876 | SCM tail = SCM_BOOL(SCM_TAILRECP (debug)); |
b7ff98dd | 1877 | SCM_SET_TAILREC (debug); |
b7ff98dd | 1878 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 1879 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
1880 | else |
1881 | { | |
1882 | scm_make_cont (&t.arg1); | |
ca6ef71a | 1883 | if (setjmp (SCM_JMPBUF (t.arg1))) |
6dbd0af5 MD |
1884 | { |
1885 | x = SCM_THROW_VALUE (t.arg1); | |
1886 | if (SCM_IMP (x)) | |
1887 | { | |
1888 | RETURN (x); | |
1889 | } | |
1890 | else | |
1891 | /* This gives the possibility for the debugger to | |
1892 | modify the source expression before evaluation. */ | |
1893 | goto dispatch; | |
1894 | } | |
1895 | } | |
2f0d1375 | 1896 | scm_ithrow (scm_sym_enter_frame, |
6dbd0af5 MD |
1897 | scm_cons2 (t.arg1, tail, |
1898 | scm_cons (scm_unmemocopy (x, env), SCM_EOL)), | |
1899 | 0); | |
1900 | } | |
6dbd0af5 | 1901 | #endif |
e3173f93 | 1902 | #if defined (USE_THREADS) || defined (DEVAL) |
f8769b1d | 1903 | dispatch: |
e3173f93 | 1904 | #endif |
9cb5124f | 1905 | SCM_TICK; |
0f2d19dd JB |
1906 | switch (SCM_TYP7 (x)) |
1907 | { | |
1908 | case scm_tcs_symbols: | |
1909 | /* Only happens when called at top level. | |
1910 | */ | |
1911 | x = scm_cons (x, SCM_UNDEFINED); | |
1912 | goto retval; | |
1913 | ||
1914 | case (127 & SCM_IM_AND): | |
1915 | x = SCM_CDR (x); | |
1916 | t.arg1 = x; | |
1917 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1918 | if (SCM_FALSEP (EVALCAR (x, env))) | |
1919 | { | |
1920 | RETURN (SCM_BOOL_F); | |
1921 | } | |
1922 | else | |
1923 | x = t.arg1; | |
6dbd0af5 | 1924 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1925 | goto carloop; |
1926 | ||
1927 | case (127 & SCM_IM_BEGIN): | |
6dbd0af5 MD |
1928 | cdrxnoap: |
1929 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
0f2d19dd JB |
1930 | cdrxbegin: |
1931 | x = SCM_CDR (x); | |
1932 | ||
1933 | begin: | |
1934 | t.arg1 = x; | |
1935 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1936 | { | |
26d5b9b4 MD |
1937 | if (SCM_IMP (SCM_CAR (x))) |
1938 | { | |
1939 | if (SCM_ISYMP (SCM_CAR (x))) | |
1940 | { | |
1941 | x = scm_m_expand_body (x, env); | |
1942 | goto begin; | |
1943 | } | |
1944 | } | |
1945 | else | |
1946 | SCM_CEVAL (SCM_CAR (x), env); | |
0f2d19dd JB |
1947 | x = t.arg1; |
1948 | } | |
1949 | ||
1950 | carloop: /* scm_eval car of last form in list */ | |
1951 | if (SCM_NCELLP (SCM_CAR (x))) | |
1952 | { | |
1953 | x = SCM_CAR (x); | |
6cb702da | 1954 | RETURN (SCM_IMP (x) ? SCM_EVALIM (x, env) : SCM_GLOC_VAL (x)) |
0f2d19dd JB |
1955 | } |
1956 | ||
1957 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
1958 | { | |
1959 | retval: | |
26d5b9b4 | 1960 | RETURN (*scm_lookupcar (x, env, 1)) |
0f2d19dd JB |
1961 | } |
1962 | ||
1963 | x = SCM_CAR (x); | |
1964 | goto loop; /* tail recurse */ | |
1965 | ||
1966 | ||
1967 | case (127 & SCM_IM_CASE): | |
1968 | x = SCM_CDR (x); | |
1969 | t.arg1 = EVALCAR (x, env); | |
1970 | while (SCM_NIMP (x = SCM_CDR (x))) | |
1971 | { | |
1972 | proc = SCM_CAR (x); | |
2f0d1375 | 1973 | if (scm_sym_else == SCM_CAR (proc)) |
0f2d19dd JB |
1974 | { |
1975 | x = SCM_CDR (proc); | |
6dbd0af5 | 1976 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1977 | goto begin; |
1978 | } | |
1979 | proc = SCM_CAR (proc); | |
1980 | while (SCM_NIMP (proc)) | |
1981 | { | |
1982 | if (CHECK_EQVISH (SCM_CAR (proc), t.arg1)) | |
1983 | { | |
1984 | x = SCM_CDR (SCM_CAR (x)); | |
6dbd0af5 | 1985 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1986 | goto begin; |
1987 | } | |
1988 | proc = SCM_CDR (proc); | |
1989 | } | |
1990 | } | |
6dbd0af5 | 1991 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
1992 | |
1993 | ||
1994 | case (127 & SCM_IM_COND): | |
1995 | while (SCM_NIMP (x = SCM_CDR (x))) | |
1996 | { | |
1997 | proc = SCM_CAR (x); | |
1998 | t.arg1 = EVALCAR (proc, env); | |
1999 | if (SCM_NFALSEP (t.arg1)) | |
2000 | { | |
2001 | x = SCM_CDR (proc); | |
6dbd0af5 | 2002 | if SCM_NULLP (x) |
0f2d19dd | 2003 | { |
6dbd0af5 | 2004 | RETURN (t.arg1) |
0f2d19dd | 2005 | } |
2f0d1375 | 2006 | if (scm_sym_arrow != SCM_CAR (x)) |
6dbd0af5 MD |
2007 | { |
2008 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2009 | goto begin; | |
2010 | } | |
0f2d19dd JB |
2011 | proc = SCM_CDR (x); |
2012 | proc = EVALCAR (proc, env); | |
2013 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
2014 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
2015 | ENTER_APPLY; | |
0f2d19dd JB |
2016 | goto evap1; |
2017 | } | |
2018 | } | |
6dbd0af5 | 2019 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
2020 | |
2021 | ||
2022 | case (127 & SCM_IM_DO): | |
2023 | x = SCM_CDR (x); | |
2024 | proc = SCM_CAR (SCM_CDR (x)); /* inits */ | |
2025 | t.arg1 = SCM_EOL; /* values */ | |
2026 | while (SCM_NIMP (proc)) | |
2027 | { | |
2028 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2029 | proc = SCM_CDR (proc); | |
2030 | } | |
e2806c10 | 2031 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd JB |
2032 | x = SCM_CDR (SCM_CDR (x)); |
2033 | while (proc = SCM_CAR (x), SCM_FALSEP (EVALCAR (proc, env))) | |
2034 | { | |
f3d2630a | 2035 | for (proc = SCM_CADR (x); SCM_NIMP (proc); proc = SCM_CDR (proc)) |
0f2d19dd JB |
2036 | { |
2037 | t.arg1 = SCM_CAR (proc); /* body */ | |
2038 | SIDEVAL (t.arg1, env); | |
2039 | } | |
f3d2630a MD |
2040 | for (t.arg1 = SCM_EOL, proc = SCM_CDDR (x); |
2041 | SCM_NIMP (proc); | |
2042 | proc = SCM_CDR (proc)) | |
0f2d19dd | 2043 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); /* steps */ |
e2806c10 | 2044 | env = EXTEND_ENV (SCM_CAR (SCM_CAR (env)), t.arg1, SCM_CDR (env)); |
0f2d19dd JB |
2045 | } |
2046 | x = SCM_CDR (proc); | |
2047 | if (SCM_NULLP (x)) | |
6dbd0af5 MD |
2048 | RETURN (SCM_UNSPECIFIED); |
2049 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
0f2d19dd JB |
2050 | goto begin; |
2051 | ||
2052 | ||
2053 | case (127 & SCM_IM_IF): | |
2054 | x = SCM_CDR (x); | |
2055 | if (SCM_NFALSEP (EVALCAR (x, env))) | |
2056 | x = SCM_CDR (x); | |
2057 | else if (SCM_IMP (x = SCM_CDR (SCM_CDR (x)))) | |
2058 | { | |
2059 | RETURN (SCM_UNSPECIFIED); | |
2060 | } | |
6dbd0af5 | 2061 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2062 | goto carloop; |
2063 | ||
2064 | ||
2065 | case (127 & SCM_IM_LET): | |
2066 | x = SCM_CDR (x); | |
2067 | proc = SCM_CAR (SCM_CDR (x)); | |
2068 | t.arg1 = SCM_EOL; | |
2069 | do | |
2070 | { | |
2071 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2072 | } | |
2073 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
e2806c10 | 2074 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd | 2075 | x = SCM_CDR (x); |
6dbd0af5 | 2076 | goto cdrxnoap; |
0f2d19dd JB |
2077 | |
2078 | ||
2079 | case (127 & SCM_IM_LETREC): | |
2080 | x = SCM_CDR (x); | |
e2806c10 | 2081 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd JB |
2082 | x = SCM_CDR (x); |
2083 | proc = SCM_CAR (x); | |
2084 | t.arg1 = SCM_EOL; | |
2085 | do | |
2086 | { | |
2087 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2088 | } | |
2089 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
a23afe53 | 2090 | SCM_SETCDR (SCM_CAR (env), t.arg1); |
6dbd0af5 | 2091 | goto cdrxnoap; |
0f2d19dd JB |
2092 | |
2093 | ||
2094 | case (127 & SCM_IM_LETSTAR): | |
2095 | x = SCM_CDR (x); | |
2096 | proc = SCM_CAR (x); | |
2097 | if (SCM_IMP (proc)) | |
2098 | { | |
e2806c10 | 2099 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 | 2100 | goto cdrxnoap; |
0f2d19dd JB |
2101 | } |
2102 | do | |
2103 | { | |
2104 | t.arg1 = SCM_CAR (proc); | |
2105 | proc = SCM_CDR (proc); | |
e2806c10 | 2106 | env = EXTEND_ENV (t.arg1, EVALCAR (proc, env), env); |
0f2d19dd JB |
2107 | } |
2108 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
6dbd0af5 | 2109 | goto cdrxnoap; |
0f2d19dd JB |
2110 | |
2111 | case (127 & SCM_IM_OR): | |
2112 | x = SCM_CDR (x); | |
2113 | t.arg1 = x; | |
2114 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
2115 | { | |
2116 | x = EVALCAR (x, env); | |
2117 | if (SCM_NFALSEP (x)) | |
2118 | { | |
2119 | RETURN (x); | |
2120 | } | |
2121 | x = t.arg1; | |
2122 | } | |
6dbd0af5 | 2123 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2124 | goto carloop; |
2125 | ||
2126 | ||
2127 | case (127 & SCM_IM_LAMBDA): | |
2128 | RETURN (scm_closure (SCM_CDR (x), env)); | |
2129 | ||
2130 | ||
2131 | case (127 & SCM_IM_QUOTE): | |
2132 | RETURN (SCM_CAR (SCM_CDR (x))); | |
2133 | ||
2134 | ||
89efbff4 | 2135 | case (127 & SCM_IM_SET_X): |
0f2d19dd JB |
2136 | x = SCM_CDR (x); |
2137 | proc = SCM_CAR (x); | |
6dbd0af5 | 2138 | switch (7 & (int) proc) |
0f2d19dd JB |
2139 | { |
2140 | case 0: | |
26d5b9b4 | 2141 | t.lloc = scm_lookupcar (x, env, 1); |
0f2d19dd JB |
2142 | break; |
2143 | case 1: | |
a23afe53 | 2144 | t.lloc = SCM_GLOC_VAL_LOC (proc); |
0f2d19dd JB |
2145 | break; |
2146 | #ifdef MEMOIZE_LOCALS | |
2147 | case 4: | |
2148 | t.lloc = scm_ilookup (proc, env); | |
2149 | break; | |
2150 | #endif | |
2151 | } | |
2152 | x = SCM_CDR (x); | |
2153 | *t.lloc = EVALCAR (x, env); | |
0f2d19dd JB |
2154 | #ifdef SICP |
2155 | RETURN (*t.lloc); | |
2156 | #else | |
2157 | RETURN (SCM_UNSPECIFIED); | |
2158 | #endif | |
2159 | ||
2160 | ||
2161 | case (127 & SCM_IM_DEFINE): /* only for internal defines */ | |
26d5b9b4 MD |
2162 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); |
2163 | ||
0f2d19dd JB |
2164 | /* new syntactic forms go here. */ |
2165 | case (127 & SCM_MAKISYM (0)): | |
2166 | proc = SCM_CAR (x); | |
2167 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
2168 | switch SCM_ISYMNUM (proc) | |
2169 | { | |
2170 | #if 0 | |
2171 | case (SCM_ISYMNUM (IM_VREF)): | |
2172 | { | |
2173 | SCM var; | |
2174 | var = SCM_CAR (SCM_CDR (x)); | |
2175 | RETURN (SCM_CDR(var)); | |
2176 | } | |
2177 | case (SCM_ISYMNUM (IM_VSET)): | |
2178 | SCM_CDR (SCM_CAR ( SCM_CDR (x))) = EVALCAR( SCM_CDR ( SCM_CDR (x)), env); | |
2179 | SCM_CAR (SCM_CAR ( SCM_CDR (x))) = scm_tc16_variable; | |
6dbd0af5 | 2180 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
2181 | #endif |
2182 | ||
2183 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2184 | proc = SCM_CDR (x); | |
2185 | proc = EVALCAR (proc, env); | |
2186 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
2187 | if (SCM_CLOSUREP (proc)) | |
2188 | { | |
1609038c | 2189 | SCM argl, tl; |
6dbd0af5 | 2190 | PREP_APPLY (proc, SCM_EOL); |
0f2d19dd JB |
2191 | t.arg1 = SCM_CDR (SCM_CDR (x)); |
2192 | t.arg1 = EVALCAR (t.arg1, env); | |
6dbd0af5 MD |
2193 | #ifdef DEVAL |
2194 | debug.info->a.args = t.arg1; | |
2195 | #endif | |
cf7c17e9 | 2196 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
2197 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), t.arg1)) |
2198 | goto wrongnumargs; | |
2199 | #endif | |
c79450dd | 2200 | ENTER_APPLY; |
1609038c MD |
2201 | /* Copy argument list */ |
2202 | if (SCM_IMP (t.arg1)) | |
2203 | argl = t.arg1; | |
2204 | else | |
2205 | { | |
2206 | argl = tl = scm_cons (SCM_CAR (t.arg1), SCM_UNSPECIFIED); | |
2207 | while (SCM_NIMP (t.arg1 = SCM_CDR (t.arg1)) | |
2208 | && SCM_CONSP (t.arg1)) | |
2209 | { | |
2210 | SCM_SETCDR (tl, scm_cons (SCM_CAR (t.arg1), | |
2211 | SCM_UNSPECIFIED)); | |
2212 | tl = SCM_CDR (tl); | |
2213 | } | |
2214 | SCM_SETCDR (tl, t.arg1); | |
2215 | } | |
2216 | ||
2217 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), argl, SCM_ENV (proc)); | |
0f2d19dd JB |
2218 | x = SCM_CODE (proc); |
2219 | goto cdrxbegin; | |
2220 | } | |
81123e6d | 2221 | proc = scm_f_apply; |
0f2d19dd JB |
2222 | goto evapply; |
2223 | ||
2224 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2225 | scm_make_cont (&t.arg1); | |
ca6ef71a | 2226 | if (setjmp (SCM_JMPBUF (t.arg1))) |
0f2d19dd JB |
2227 | { |
2228 | SCM val; | |
2229 | val = SCM_THROW_VALUE (t.arg1); | |
a570e93a | 2230 | RETURN (val) |
0f2d19dd JB |
2231 | } |
2232 | proc = SCM_CDR (x); | |
2233 | proc = evalcar (proc, env); | |
2234 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
2235 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
2236 | ENTER_APPLY; | |
0f2d19dd JB |
2237 | goto evap1; |
2238 | ||
a570e93a MD |
2239 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
2240 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))) | |
2241 | ||
89efbff4 | 2242 | case (SCM_ISYMNUM (SCM_IM_DISPATCH)): |
195847fa MD |
2243 | proc = SCM_CADR (x); /* unevaluated operands */ |
2244 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2245 | if (SCM_IMP (proc)) | |
2246 | arg2 = *scm_ilookup (proc, env); | |
2247 | else if (SCM_NCONSP (proc)) | |
2248 | { | |
2249 | if (SCM_NCELLP (proc)) | |
2250 | arg2 = SCM_GLOC_VAL (proc); | |
2251 | else | |
2252 | arg2 = *scm_lookupcar (SCM_CDR (x), env, 1); | |
2253 | } | |
2254 | else | |
2255 | { | |
2256 | arg2 = scm_cons (EVALCAR (proc, env), SCM_EOL); | |
2257 | t.lloc = SCM_CDRLOC (arg2); | |
2258 | while (SCM_NIMP (proc = SCM_CDR (proc))) | |
2259 | { | |
2260 | *t.lloc = scm_cons (EVALCAR (proc, env), SCM_EOL); | |
2261 | t.lloc = SCM_CDRLOC (*t.lloc); | |
2262 | } | |
2263 | } | |
2264 | ||
2265 | type_dispatch: | |
61364ba6 MD |
2266 | /* The type dispatch code is duplicated here |
2267 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
2268 | * cuts down execution time for type dispatch to 50%. | |
2269 | */ | |
2270 | { | |
2271 | int i, n, end, mask; | |
2272 | SCM z = SCM_CDDR (x); | |
2273 | n = SCM_INUM (SCM_CAR (z)); /* maximum number of specializers */ | |
2274 | proc = SCM_CADR (z); | |
2275 | ||
2276 | if (SCM_NIMP (proc)) | |
2277 | { | |
2278 | /* Prepare for linear search */ | |
2279 | mask = -1; | |
2280 | i = 0; | |
2281 | end = SCM_LENGTH (proc); | |
2282 | } | |
2283 | else | |
2284 | { | |
2285 | /* Compute a hash value */ | |
2286 | int hashset = SCM_INUM (proc); | |
2287 | int j = n; | |
2288 | mask = SCM_INUM (SCM_CAR (z = SCM_CDDR (z))); | |
2289 | proc = SCM_CADR (z); | |
2290 | i = 0; | |
2291 | t.arg1 = arg2; | |
2292 | if (SCM_NIMP (t.arg1)) | |
2293 | do | |
2294 | { | |
2295 | i += (SCM_STRUCT_DATA (scm_class_of (SCM_CAR (t.arg1))) | |
2296 | [scm_si_hashsets + hashset]); | |
2297 | t.arg1 = SCM_CDR (t.arg1); | |
2298 | } | |
2299 | while (--j && SCM_NIMP (t.arg1)); | |
2300 | i &= mask; | |
2301 | end = i; | |
2302 | } | |
2303 | ||
2304 | /* Search for match */ | |
2305 | do | |
2306 | { | |
2307 | int j = n; | |
2308 | z = SCM_VELTS (proc)[i]; | |
2309 | t.arg1 = arg2; /* list of arguments */ | |
2310 | if (SCM_NIMP (t.arg1)) | |
2311 | do | |
2312 | { | |
2313 | /* More arguments than specifiers => CLASS != ENV */ | |
2314 | if (scm_class_of (SCM_CAR (t.arg1)) != SCM_CAR (z)) | |
2315 | goto next_method; | |
2316 | t.arg1 = SCM_CDR (t.arg1); | |
2317 | z = SCM_CDR (z); | |
2318 | } | |
2319 | while (--j && SCM_NIMP (t.arg1)); | |
2320 | /* Fewer arguments than specifiers => CAR != ENV */ | |
2321 | if (!(SCM_IMP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z)))) | |
2322 | goto next_method; | |
2323 | apply_cmethod: | |
2324 | env = EXTEND_ENV (SCM_CAR (SCM_CMETHOD_CODE (z)), | |
2325 | arg2, | |
2326 | SCM_CMETHOD_ENV (z)); | |
2327 | x = SCM_CMETHOD_CODE (z); | |
2328 | goto cdrxbegin; | |
2329 | next_method: | |
2330 | i = (i + 1) & mask; | |
2331 | } while (i != end); | |
2332 | ||
2333 | z = scm_memoize_method (x, arg2); | |
2334 | goto apply_cmethod; | |
2335 | } | |
73b64342 | 2336 | |
ca4be6ea MD |
2337 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2338 | x = SCM_CDR (x); | |
2339 | t.arg1 = EVALCAR (x, env); | |
7d2b68a8 | 2340 | RETURN (SCM_STRUCT_DATA (t.arg1)[SCM_INUM (SCM_CADR (x))]) |
ca4be6ea MD |
2341 | |
2342 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): | |
2343 | x = SCM_CDR (x); | |
2344 | t.arg1 = EVALCAR (x, env); | |
2345 | x = SCM_CDR (x); | |
2346 | proc = SCM_CDR (x); | |
1f325865 MD |
2347 | SCM_STRUCT_DATA (t.arg1)[SCM_INUM (SCM_CAR (x))] |
2348 | = EVALCAR (proc, env); | |
5623a9b4 | 2349 | RETURN (SCM_UNSPECIFIED) |
ca4be6ea | 2350 | |
73b64342 MD |
2351 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
2352 | proc = SCM_CDR (x); | |
2353 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2354 | { | |
2355 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
2356 | || t.arg1 == scm_nil)) | |
2357 | { | |
2358 | if (SCM_CAR (x) == SCM_UNSPECIFIED) | |
2359 | RETURN (t.arg1); | |
2360 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2361 | goto carloop; | |
2362 | } | |
2363 | proc = SCM_CDR (x); | |
2364 | } | |
2365 | x = proc; | |
2366 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2367 | goto carloop; | |
2368 | ||
2369 | case (SCM_ISYMNUM (SCM_IM_NIL_IFY)): | |
2370 | x = SCM_CDR (x); | |
2371 | RETURN ((SCM_FALSEP (proc = EVALCAR (x, env)) || SCM_NULLP (proc)) | |
2372 | ? scm_nil | |
2373 | : proc) | |
2374 | ||
2375 | case (SCM_ISYMNUM (SCM_IM_T_IFY)): | |
2376 | x = SCM_CDR (x); | |
2377 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) ? scm_t : scm_nil) | |
2378 | ||
2379 | case (SCM_ISYMNUM (SCM_IM_0_COND)): | |
2380 | proc = SCM_CDR (x); | |
2381 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2382 | { | |
2383 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
2384 | || t.arg1 == SCM_INUM0)) | |
2385 | { | |
2386 | if (SCM_CAR (x) == SCM_UNSPECIFIED) | |
2387 | RETURN (t.arg1); | |
2388 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2389 | goto carloop; | |
2390 | } | |
2391 | proc = SCM_CDR (x); | |
2392 | } | |
2393 | x = proc; | |
2394 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2395 | goto carloop; | |
2396 | ||
2397 | case (SCM_ISYMNUM (SCM_IM_0_IFY)): | |
2398 | x = SCM_CDR (x); | |
2399 | RETURN (SCM_FALSEP (proc = EVALCAR (x, env)) | |
2400 | ? SCM_INUM0 | |
2401 | : proc) | |
2402 | ||
2403 | case (SCM_ISYMNUM (SCM_IM_1_IFY)): | |
2404 | x = SCM_CDR (x); | |
2405 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) | |
2406 | ? SCM_MAKINUM (1) | |
2407 | : SCM_INUM0) | |
2408 | ||
2409 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2410 | x = SCM_CDR (x); | |
2411 | ||
2412 | t.arg1 = SCM_CAR (x); | |
2413 | arg2 = SCM_CDAR (env); | |
2414 | while (SCM_NIMP (arg2)) | |
2415 | { | |
2416 | proc = SCM_GLOC_VAL (SCM_CAR (t.arg1)); | |
2417 | SCM_SETCDR (SCM_CAR (t.arg1) - 1L, SCM_CAR (arg2)); | |
2418 | SCM_SETCAR (arg2, proc); | |
2419 | t.arg1 = SCM_CDR (t.arg1); | |
2420 | arg2 = SCM_CDR (arg2); | |
2421 | } | |
2422 | t.arg1 = SCM_CAR (x); | |
2423 | scm_dynwinds = scm_acons (t.arg1, SCM_CDAR (env), scm_dynwinds); | |
89efbff4 | 2424 | |
73b64342 MD |
2425 | arg2 = x = SCM_CDR (x); |
2426 | while (SCM_NNULLP (arg2 = SCM_CDR (arg2))) | |
2427 | { | |
2428 | SIDEVAL (SCM_CAR (x), env); | |
2429 | x = arg2; | |
2430 | } | |
2431 | proc = EVALCAR (x, env); | |
2432 | ||
2433 | scm_dynwinds = SCM_CDR (scm_dynwinds); | |
2434 | arg2 = SCM_CDAR (env); | |
2435 | while (SCM_NIMP (arg2)) | |
2436 | { | |
2437 | SCM_SETCDR (SCM_CAR (t.arg1) - 1L, SCM_CAR (arg2)); | |
2438 | t.arg1 = SCM_CDR (t.arg1); | |
2439 | arg2 = SCM_CDR (arg2); | |
2440 | } | |
2441 | ||
2442 | RETURN (proc) | |
2443 | ||
0f2d19dd JB |
2444 | default: |
2445 | goto badfun; | |
2446 | } | |
2447 | ||
2448 | default: | |
2449 | proc = x; | |
2450 | badfun: | |
f5bf2977 | 2451 | /* scm_everr (x, env,...) */ |
523f5266 GH |
2452 | scm_misc_error (NULL, |
2453 | "Wrong type to apply: %S", | |
2454 | scm_listify (proc, SCM_UNDEFINED)); | |
0f2d19dd JB |
2455 | case scm_tc7_vector: |
2456 | case scm_tc7_wvect: | |
afe5177e | 2457 | #ifdef HAVE_ARRAYS |
0f2d19dd JB |
2458 | case scm_tc7_bvect: |
2459 | case scm_tc7_byvect: | |
2460 | case scm_tc7_svect: | |
2461 | case scm_tc7_ivect: | |
2462 | case scm_tc7_uvect: | |
2463 | case scm_tc7_fvect: | |
2464 | case scm_tc7_dvect: | |
2465 | case scm_tc7_cvect: | |
5c11cc9d | 2466 | #ifdef HAVE_LONG_LONGS |
0f2d19dd | 2467 | case scm_tc7_llvect: |
afe5177e | 2468 | #endif |
0f2d19dd JB |
2469 | #endif |
2470 | case scm_tc7_string: | |
0f2d19dd | 2471 | case scm_tc7_substring: |
0f2d19dd JB |
2472 | case scm_tc7_smob: |
2473 | case scm_tcs_closures: | |
224822be MD |
2474 | #ifdef CCLO |
2475 | case scm_tc7_cclo: | |
2476 | #endif | |
89efbff4 | 2477 | case scm_tc7_pws: |
0f2d19dd JB |
2478 | case scm_tcs_subrs: |
2479 | RETURN (x); | |
2480 | ||
2481 | #ifdef MEMOIZE_LOCALS | |
2482 | case (127 & SCM_ILOC00): | |
2483 | proc = *scm_ilookup (SCM_CAR (x), env); | |
2484 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2485 | #ifndef SCM_RECKLESS |
2486 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2487 | goto checkargs; |
2488 | #endif | |
2489 | #endif | |
2490 | break; | |
2491 | #endif /* ifdef MEMOIZE_LOCALS */ | |
2492 | ||
2493 | ||
2494 | case scm_tcs_cons_gloc: | |
2495 | proc = SCM_GLOC_VAL (SCM_CAR (x)); | |
aa00bd1e MD |
2496 | if (proc == 0) |
2497 | /* This is a struct implanted in the code, not a gloc. */ | |
2498 | RETURN (x); | |
0f2d19dd | 2499 | SCM_ASRTGO (SCM_NIMP (proc), badfun); |
cf7c17e9 JB |
2500 | #ifndef SCM_RECKLESS |
2501 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2502 | goto checkargs; |
2503 | #endif | |
2504 | #endif | |
2505 | break; | |
2506 | ||
2507 | ||
2508 | case scm_tcs_cons_nimcar: | |
2509 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
2510 | { | |
f8769b1d | 2511 | #ifdef USE_THREADS |
26d5b9b4 | 2512 | t.lloc = scm_lookupcar1 (x, env, 1); |
f8769b1d MV |
2513 | if (t.lloc == NULL) |
2514 | { | |
2515 | /* we have lost the race, start again. */ | |
2516 | goto dispatch; | |
2517 | } | |
2518 | proc = *t.lloc; | |
2519 | #else | |
26d5b9b4 | 2520 | proc = *scm_lookupcar (x, env, 1); |
f8769b1d MV |
2521 | #endif |
2522 | ||
0f2d19dd JB |
2523 | if (SCM_IMP (proc)) |
2524 | { | |
2525 | unmemocar (x, env); | |
2526 | goto badfun; | |
2527 | } | |
2528 | if (scm_tc16_macro == SCM_TYP16 (proc)) | |
2529 | { | |
2530 | unmemocar (x, env); | |
2531 | ||
2532 | handle_a_macro: | |
368bf056 | 2533 | #ifdef DEVAL |
7c354052 MD |
2534 | /* Set a flag during macro expansion so that macro |
2535 | application frames can be deleted from the backtrace. */ | |
2536 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2537 | #endif |
f8769b1d MV |
2538 | t.arg1 = SCM_APPLY (SCM_CDR (proc), x, |
2539 | scm_cons (env, scm_listofnull)); | |
2540 | ||
7c354052 MD |
2541 | #ifdef DEVAL |
2542 | SCM_CLEAR_MACROEXP (debug); | |
2543 | #endif | |
0f2d19dd JB |
2544 | switch ((int) (SCM_CAR (proc) >> 16)) |
2545 | { | |
2546 | case 2: | |
2547 | if (scm_ilength (t.arg1) <= 0) | |
2548 | t.arg1 = scm_cons2 (SCM_IM_BEGIN, t.arg1, SCM_EOL); | |
6dbd0af5 MD |
2549 | #ifdef DEVAL |
2550 | if (!SCM_CLOSUREP (SCM_CDR (proc))) | |
2551 | { | |
f8769b1d | 2552 | |
6dbd0af5 MD |
2553 | #if 0 /* Top-level defines doesn't very often occur in backtraces */ |
2554 | if (scm_m_define == SCM_SUBRF (SCM_CDR (proc)) && SCM_TOP_LEVEL (env)) | |
2555 | /* Prevent memoizing result of define macro */ | |
2556 | { | |
2557 | debug.info->e.exp = scm_cons (SCM_CAR (x), SCM_CDR (x)); | |
2558 | scm_set_source_properties_x (debug.info->e.exp, | |
2559 | scm_source_properties (x)); | |
2560 | } | |
2561 | #endif | |
2562 | SCM_DEFER_INTS; | |
a23afe53 MD |
2563 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2564 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
6dbd0af5 MD |
2565 | SCM_ALLOW_INTS; |
2566 | goto dispatch; | |
2567 | } | |
2568 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
2569 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
2570 | SCM_CAR (x), | |
2571 | SCM_CDR (x)); | |
6dbd0af5 | 2572 | #endif |
0f2d19dd | 2573 | SCM_DEFER_INTS; |
a23afe53 MD |
2574 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2575 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
0f2d19dd | 2576 | SCM_ALLOW_INTS; |
6dbd0af5 | 2577 | goto loopnoap; |
0f2d19dd JB |
2578 | case 1: |
2579 | if (SCM_NIMP (x = t.arg1)) | |
6dbd0af5 | 2580 | goto loopnoap; |
0f2d19dd JB |
2581 | case 0: |
2582 | RETURN (t.arg1); | |
2583 | } | |
2584 | } | |
2585 | } | |
2586 | else | |
2587 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
2588 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2589 | #ifndef SCM_RECKLESS |
2590 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2591 | checkargs: |
2592 | #endif | |
2593 | if (SCM_CLOSUREP (proc)) | |
2594 | { | |
2595 | arg2 = SCM_CAR (SCM_CODE (proc)); | |
2596 | t.arg1 = SCM_CDR (x); | |
2597 | while (SCM_NIMP (arg2)) | |
2598 | { | |
2599 | if (SCM_NCONSP (arg2)) | |
2600 | goto evapply; | |
2601 | if (SCM_IMP (t.arg1)) | |
2602 | goto umwrongnumargs; | |
2603 | arg2 = SCM_CDR (arg2); | |
2604 | t.arg1 = SCM_CDR (t.arg1); | |
2605 | } | |
2606 | if (SCM_NNULLP (t.arg1)) | |
2607 | goto umwrongnumargs; | |
2608 | } | |
2609 | else if (scm_tc16_macro == SCM_TYP16 (proc)) | |
2610 | goto handle_a_macro; | |
2611 | #endif | |
2612 | } | |
2613 | ||
2614 | ||
6dbd0af5 MD |
2615 | evapply: |
2616 | PREP_APPLY (proc, SCM_EOL); | |
2617 | if (SCM_NULLP (SCM_CDR (x))) { | |
2618 | ENTER_APPLY; | |
89efbff4 | 2619 | evap0: |
0f2d19dd JB |
2620 | switch (SCM_TYP7 (proc)) |
2621 | { /* no arguments given */ | |
2622 | case scm_tc7_subr_0: | |
2623 | RETURN (SCM_SUBRF (proc) ()); | |
2624 | case scm_tc7_subr_1o: | |
2625 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2626 | case scm_tc7_lsubr: | |
2627 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2628 | case scm_tc7_rpsubr: | |
2629 | RETURN (SCM_BOOL_T); | |
2630 | case scm_tc7_asubr: | |
2631 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
6dbd0af5 | 2632 | #ifdef CCLO |
0f2d19dd JB |
2633 | case scm_tc7_cclo: |
2634 | t.arg1 = proc; | |
2635 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2636 | #ifdef DEVAL |
2637 | debug.info->a.proc = proc; | |
2638 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2639 | #endif | |
0f2d19dd | 2640 | goto evap1; |
6dbd0af5 | 2641 | #endif |
89efbff4 MD |
2642 | case scm_tc7_pws: |
2643 | proc = SCM_PROCEDURE (proc); | |
2644 | #ifdef DEVAL | |
2645 | debug.info->a.proc = proc; | |
2646 | #endif | |
2647 | goto evap0; | |
0f2d19dd JB |
2648 | case scm_tcs_closures: |
2649 | x = SCM_CODE (proc); | |
e2806c10 | 2650 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, SCM_ENV (proc)); |
0f2d19dd | 2651 | goto cdrxbegin; |
da7f71d7 | 2652 | case scm_tcs_cons_gloc: |
195847fa MD |
2653 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2654 | { | |
2655 | x = SCM_ENTITY_PROCEDURE (proc); | |
2656 | arg2 = SCM_EOL; | |
2657 | goto type_dispatch; | |
2658 | } | |
2659 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2660 | goto badfun; |
2661 | else | |
da7f71d7 | 2662 | { |
195847fa MD |
2663 | t.arg1 = proc; |
2664 | proc = (SCM_I_ENTITYP (proc) | |
2665 | ? SCM_ENTITY_PROCEDURE (proc) | |
2666 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 2667 | #ifdef DEVAL |
195847fa MD |
2668 | debug.info->a.proc = proc; |
2669 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
da7f71d7 | 2670 | #endif |
195847fa MD |
2671 | if (SCM_NIMP (proc)) |
2672 | goto evap1; | |
2673 | else | |
2674 | goto badfun; | |
da7f71d7 | 2675 | } |
0f2d19dd JB |
2676 | case scm_tc7_contin: |
2677 | case scm_tc7_subr_1: | |
2678 | case scm_tc7_subr_2: | |
2679 | case scm_tc7_subr_2o: | |
2680 | case scm_tc7_cxr: | |
2681 | case scm_tc7_subr_3: | |
2682 | case scm_tc7_lsubr_2: | |
2683 | umwrongnumargs: | |
2684 | unmemocar (x, env); | |
2685 | wrongnumargs: | |
f5bf2977 GH |
2686 | /* scm_everr (x, env,...) */ |
2687 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
2688 | default: |
2689 | /* handle macros here */ | |
2690 | goto badfun; | |
2691 | } | |
6dbd0af5 | 2692 | } |
0f2d19dd JB |
2693 | |
2694 | /* must handle macros by here */ | |
2695 | x = SCM_CDR (x); | |
cf7c17e9 | 2696 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2697 | if (SCM_IMP (x)) |
2698 | goto wrongnumargs; | |
680ed4a8 MD |
2699 | else if (SCM_CONSP (x)) |
2700 | { | |
2701 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2702 | t.arg1 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2703 | else |
2704 | t.arg1 = EVALCELLCAR (x, env); | |
2705 | } | |
2706 | else if (SCM_TYP3 (x) == 1) | |
2707 | { | |
2708 | if ((t.arg1 = SCM_GLOC_VAL (SCM_CAR (x))) == 0) | |
2709 | t.arg1 = SCM_CAR (x); /* struct planted in code */ | |
2710 | } | |
2711 | else | |
2712 | goto wrongnumargs; | |
2713 | #else | |
0f2d19dd | 2714 | t.arg1 = EVALCAR (x, env); |
680ed4a8 | 2715 | #endif |
6dbd0af5 MD |
2716 | #ifdef DEVAL |
2717 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2718 | #endif | |
0f2d19dd JB |
2719 | x = SCM_CDR (x); |
2720 | if (SCM_NULLP (x)) | |
2721 | { | |
6dbd0af5 | 2722 | ENTER_APPLY; |
0f2d19dd JB |
2723 | evap1: |
2724 | switch (SCM_TYP7 (proc)) | |
6dbd0af5 | 2725 | { /* have one argument in t.arg1 */ |
0f2d19dd JB |
2726 | case scm_tc7_subr_2o: |
2727 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2728 | case scm_tc7_subr_1: | |
2729 | case scm_tc7_subr_1o: | |
2730 | RETURN (SCM_SUBRF (proc) (t.arg1)); | |
2731 | case scm_tc7_cxr: | |
2732 | #ifdef SCM_FLOATS | |
2733 | if (SCM_SUBRF (proc)) | |
2734 | { | |
2735 | if (SCM_INUMP (t.arg1)) | |
2736 | { | |
2737 | RETURN (scm_makdbl (SCM_DSUBRF (proc) ((double) SCM_INUM (t.arg1)), | |
2738 | 0.0)); | |
2739 | } | |
2740 | SCM_ASRTGO (SCM_NIMP (t.arg1), floerr); | |
2741 | if (SCM_REALP (t.arg1)) | |
2742 | { | |
2743 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (SCM_REALPART (t.arg1)), 0.0)); | |
2744 | } | |
2745 | #ifdef SCM_BIGDIG | |
2746 | if (SCM_BIGP (t.arg1)) | |
2747 | { | |
2748 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (scm_big2dbl (t.arg1)), 0.0)); | |
2749 | } | |
2750 | #endif | |
2751 | floerr: | |
9de33deb MD |
2752 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), t.arg1, |
2753 | SCM_ARG1, SCM_CHARS (SCM_SNAME (proc))); | |
0f2d19dd JB |
2754 | } |
2755 | #endif | |
2756 | proc = (SCM) SCM_SNAME (proc); | |
2757 | { | |
2758 | char *chrs = SCM_CHARS (proc) + SCM_LENGTH (proc) - 1; | |
2759 | while ('c' != *--chrs) | |
2760 | { | |
0c95b57d | 2761 | SCM_ASSERT (SCM_CONSP (t.arg1), |
0f2d19dd JB |
2762 | t.arg1, SCM_ARG1, SCM_CHARS (proc)); |
2763 | t.arg1 = ('a' == *chrs) ? SCM_CAR (t.arg1) : SCM_CDR (t.arg1); | |
2764 | } | |
2765 | RETURN (t.arg1); | |
2766 | } | |
2767 | case scm_tc7_rpsubr: | |
2768 | RETURN (SCM_BOOL_T); | |
2769 | case scm_tc7_asubr: | |
2770 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2771 | case scm_tc7_lsubr: | |
2772 | #ifdef DEVAL | |
6dbd0af5 | 2773 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
0f2d19dd JB |
2774 | #else |
2775 | RETURN (SCM_SUBRF (proc) (scm_cons (t.arg1, SCM_EOL))); | |
2776 | #endif | |
6dbd0af5 | 2777 | #ifdef CCLO |
0f2d19dd JB |
2778 | case scm_tc7_cclo: |
2779 | arg2 = t.arg1; | |
2780 | t.arg1 = proc; | |
2781 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2782 | #ifdef DEVAL |
2783 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); | |
2784 | debug.info->a.proc = proc; | |
2785 | #endif | |
0f2d19dd | 2786 | goto evap2; |
6dbd0af5 | 2787 | #endif |
89efbff4 MD |
2788 | case scm_tc7_pws: |
2789 | proc = SCM_PROCEDURE (proc); | |
2790 | #ifdef DEVAL | |
2791 | debug.info->a.proc = proc; | |
2792 | #endif | |
2793 | goto evap1; | |
0f2d19dd | 2794 | case scm_tcs_closures: |
195847fa | 2795 | /* clos1: */ |
0f2d19dd JB |
2796 | x = SCM_CODE (proc); |
2797 | #ifdef DEVAL | |
e2806c10 | 2798 | env = EXTEND_ENV (SCM_CAR (x), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2799 | #else |
e2806c10 | 2800 | env = EXTEND_ENV (SCM_CAR (x), scm_cons (t.arg1, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd JB |
2801 | #endif |
2802 | goto cdrxbegin; | |
65e41721 MD |
2803 | case scm_tc7_contin: |
2804 | scm_call_continuation (proc, t.arg1); | |
0c32d76c | 2805 | case scm_tcs_cons_gloc: |
f3d2630a MD |
2806 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2807 | { | |
195847fa | 2808 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2809 | #ifdef DEVAL |
2810 | arg2 = debug.info->a.args; | |
2811 | #else | |
2812 | arg2 = scm_cons (t.arg1, SCM_EOL); | |
2813 | #endif | |
f3d2630a MD |
2814 | goto type_dispatch; |
2815 | } | |
2816 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2817 | goto badfun; |
2818 | else | |
0c32d76c | 2819 | { |
195847fa MD |
2820 | arg2 = t.arg1; |
2821 | t.arg1 = proc; | |
2822 | proc = (SCM_I_ENTITYP (proc) | |
2823 | ? SCM_ENTITY_PROCEDURE (proc) | |
2824 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 2825 | #ifdef DEVAL |
195847fa MD |
2826 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); |
2827 | debug.info->a.proc = proc; | |
0c32d76c | 2828 | #endif |
195847fa MD |
2829 | if (SCM_NIMP (proc)) |
2830 | goto evap2; | |
2831 | else | |
2832 | goto badfun; | |
0c32d76c | 2833 | } |
0f2d19dd JB |
2834 | case scm_tc7_subr_2: |
2835 | case scm_tc7_subr_0: | |
2836 | case scm_tc7_subr_3: | |
2837 | case scm_tc7_lsubr_2: | |
2838 | goto wrongnumargs; | |
2839 | default: | |
2840 | goto badfun; | |
2841 | } | |
2842 | } | |
cf7c17e9 | 2843 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2844 | if (SCM_IMP (x)) |
2845 | goto wrongnumargs; | |
680ed4a8 MD |
2846 | else if (SCM_CONSP (x)) |
2847 | { | |
2848 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2849 | arg2 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2850 | else |
2851 | arg2 = EVALCELLCAR (x, env); | |
2852 | } | |
2853 | else if (SCM_TYP3 (x) == 1) | |
2854 | { | |
2855 | if ((arg2 = SCM_GLOC_VAL (SCM_CAR (x))) == 0) | |
2856 | arg2 = SCM_CAR (x); /* struct planted in code */ | |
2857 | } | |
2858 | else | |
2859 | goto wrongnumargs; | |
2860 | #else | |
2861 | arg2 = EVALCAR (x, env); | |
0f2d19dd JB |
2862 | #endif |
2863 | { /* have two or more arguments */ | |
6dbd0af5 MD |
2864 | #ifdef DEVAL |
2865 | debug.info->a.args = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2866 | #endif | |
0f2d19dd JB |
2867 | x = SCM_CDR (x); |
2868 | if (SCM_NULLP (x)) { | |
6dbd0af5 | 2869 | ENTER_APPLY; |
0f2d19dd JB |
2870 | #ifdef CCLO |
2871 | evap2: | |
2872 | #endif | |
6dbd0af5 MD |
2873 | switch (SCM_TYP7 (proc)) |
2874 | { /* have two arguments */ | |
2875 | case scm_tc7_subr_2: | |
2876 | case scm_tc7_subr_2o: | |
2877 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2878 | case scm_tc7_lsubr: | |
0f2d19dd | 2879 | #ifdef DEVAL |
6dbd0af5 MD |
2880 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
2881 | #else | |
2882 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, arg2, SCM_EOL))); | |
0f2d19dd | 2883 | #endif |
6dbd0af5 MD |
2884 | case scm_tc7_lsubr_2: |
2885 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_EOL)); | |
2886 | case scm_tc7_rpsubr: | |
2887 | case scm_tc7_asubr: | |
2888 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2889 | #ifdef CCLO | |
2890 | cclon: | |
2891 | case scm_tc7_cclo: | |
0f2d19dd | 2892 | #ifdef DEVAL |
195847fa MD |
2893 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2894 | scm_cons (proc, debug.info->a.args), | |
2895 | SCM_EOL)); | |
0f2d19dd | 2896 | #else |
195847fa MD |
2897 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2898 | scm_cons2 (proc, t.arg1, | |
2899 | scm_cons (arg2, | |
2900 | scm_eval_args (x, | |
2901 | env, | |
2902 | proc))), | |
2903 | SCM_EOL)); | |
0f2d19dd | 2904 | #endif |
6dbd0af5 MD |
2905 | /* case scm_tc7_cclo: |
2906 | x = scm_cons(arg2, scm_eval_args(x, env)); | |
2907 | arg2 = t.arg1; | |
2908 | t.arg1 = proc; | |
2909 | proc = SCM_CCLO_SUBR(proc); | |
2910 | goto evap3; */ | |
2911 | #endif | |
89efbff4 MD |
2912 | case scm_tc7_pws: |
2913 | proc = SCM_PROCEDURE (proc); | |
2914 | #ifdef DEVAL | |
2915 | debug.info->a.proc = proc; | |
2916 | #endif | |
2917 | goto evap2; | |
0c32d76c | 2918 | case scm_tcs_cons_gloc: |
f3d2630a MD |
2919 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2920 | { | |
195847fa | 2921 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2922 | #ifdef DEVAL |
2923 | arg2 = debug.info->a.args; | |
2924 | #else | |
2925 | arg2 = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2926 | #endif | |
f3d2630a MD |
2927 | goto type_dispatch; |
2928 | } | |
2929 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2930 | goto badfun; |
2931 | else | |
0c32d76c | 2932 | { |
195847fa | 2933 | operatorn: |
0c32d76c | 2934 | #ifdef DEVAL |
195847fa MD |
2935 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
2936 | ? SCM_ENTITY_PROCEDURE (proc) | |
2937 | : SCM_OPERATOR_PROCEDURE (proc), | |
2938 | scm_cons (proc, debug.info->a.args), | |
2939 | SCM_EOL)); | |
2940 | #else | |
2941 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) | |
2942 | ? SCM_ENTITY_PROCEDURE (proc) | |
2943 | : SCM_OPERATOR_PROCEDURE (proc), | |
2944 | scm_cons2 (proc, t.arg1, | |
2945 | scm_cons (arg2, | |
2946 | scm_eval_args (x, | |
2947 | env, | |
2948 | proc))), | |
2949 | SCM_EOL)); | |
2950 | #endif | |
0c32d76c | 2951 | } |
6dbd0af5 MD |
2952 | case scm_tc7_subr_0: |
2953 | case scm_tc7_cxr: | |
2954 | case scm_tc7_subr_1o: | |
2955 | case scm_tc7_subr_1: | |
2956 | case scm_tc7_subr_3: | |
2957 | case scm_tc7_contin: | |
2958 | goto wrongnumargs; | |
2959 | default: | |
2960 | goto badfun; | |
2961 | case scm_tcs_closures: | |
195847fa | 2962 | /* clos2: */ |
0f2d19dd | 2963 | #ifdef DEVAL |
da7f71d7 MD |
2964 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
2965 | debug.info->a.args, | |
2966 | SCM_ENV (proc)); | |
0f2d19dd | 2967 | #else |
da7f71d7 MD |
2968 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
2969 | scm_cons2 (t.arg1, arg2, SCM_EOL), SCM_ENV (proc)); | |
0f2d19dd | 2970 | #endif |
6dbd0af5 MD |
2971 | x = SCM_CODE (proc); |
2972 | goto cdrxbegin; | |
2973 | } | |
0f2d19dd | 2974 | } |
cf7c17e9 | 2975 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
2976 | if (SCM_IMP (x) || SCM_NECONSP (x)) |
2977 | goto wrongnumargs; | |
2978 | #endif | |
0f2d19dd | 2979 | #ifdef DEVAL |
6dbd0af5 | 2980 | debug.info->a.args = scm_cons2 (t.arg1, arg2, |
680ed4a8 MD |
2981 | scm_deval_args (x, env, proc, |
2982 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
0f2d19dd | 2983 | #endif |
6dbd0af5 | 2984 | ENTER_APPLY; |
89efbff4 | 2985 | evap3: |
6dbd0af5 MD |
2986 | switch (SCM_TYP7 (proc)) |
2987 | { /* have 3 or more arguments */ | |
0f2d19dd | 2988 | #ifdef DEVAL |
6dbd0af5 MD |
2989 | case scm_tc7_subr_3: |
2990 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
da7f71d7 MD |
2991 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
2992 | SCM_CADDR (debug.info->a.args))); | |
6dbd0af5 | 2993 | case scm_tc7_asubr: |
399dedcc MD |
2994 | #ifdef BUILTIN_RPASUBR |
2995 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
2996 | arg2 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
2997 | do |
2998 | { | |
2999 | t.arg1 = SCM_SUBRF(proc)(t.arg1, SCM_CAR (arg2)); | |
3000 | arg2 = SCM_CDR (arg2); | |
3001 | } | |
3002 | while (SCM_NIMP (arg2)); | |
399dedcc MD |
3003 | RETURN (t.arg1) |
3004 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3005 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3006 | #ifdef BUILTIN_RPASUBR |
3007 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3008 | RETURN (SCM_BOOL_F) | |
3009 | t.arg1 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
3010 | do |
3011 | { | |
3012 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (t.arg1)))) | |
3013 | RETURN (SCM_BOOL_F) | |
3014 | arg2 = SCM_CAR (t.arg1); | |
3015 | t.arg1 = SCM_CDR (t.arg1); | |
3016 | } | |
3017 | while (SCM_NIMP (t.arg1)); | |
71d3aa6d MD |
3018 | RETURN (SCM_BOOL_T) |
3019 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 MD |
3020 | RETURN (SCM_APPLY (proc, t.arg1, |
3021 | scm_acons (arg2, | |
3022 | SCM_CDR (SCM_CDR (debug.info->a.args)), | |
3023 | SCM_EOL))) | |
71d3aa6d | 3024 | #endif /* BUILTIN_RPASUBR */ |
399dedcc | 3025 | case scm_tc7_lsubr_2: |
da7f71d7 MD |
3026 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3027 | SCM_CDR (SCM_CDR (debug.info->a.args)))) | |
399dedcc MD |
3028 | case scm_tc7_lsubr: |
3029 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) | |
0f2d19dd | 3030 | #ifdef CCLO |
6dbd0af5 MD |
3031 | case scm_tc7_cclo: |
3032 | goto cclon; | |
0f2d19dd | 3033 | #endif |
89efbff4 MD |
3034 | case scm_tc7_pws: |
3035 | proc = SCM_PROCEDURE (proc); | |
3036 | debug.info->a.proc = proc; | |
3037 | goto evap3; | |
6dbd0af5 | 3038 | case scm_tcs_closures: |
b7ff98dd | 3039 | SCM_SET_ARGSREADY (debug); |
e2806c10 | 3040 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
6dbd0af5 MD |
3041 | debug.info->a.args, |
3042 | SCM_ENV (proc)); | |
3043 | x = SCM_CODE (proc); | |
3044 | goto cdrxbegin; | |
3045 | #else /* DEVAL */ | |
3046 | case scm_tc7_subr_3: | |
3047 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
3048 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, EVALCAR (x, env))); | |
3049 | case scm_tc7_asubr: | |
399dedcc | 3050 | #ifdef BUILTIN_RPASUBR |
da7f71d7 MD |
3051 | t.arg1 = SCM_SUBRF (proc) (t.arg1, arg2); |
3052 | do | |
3053 | { | |
3054 | t.arg1 = SCM_SUBRF(proc)(t.arg1, EVALCAR(x, env)); | |
3055 | x = SCM_CDR(x); | |
3056 | } | |
3057 | while (SCM_NIMP (x)); | |
399dedcc MD |
3058 | RETURN (t.arg1) |
3059 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3060 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3061 | #ifdef BUILTIN_RPASUBR |
3062 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3063 | RETURN (SCM_BOOL_F) | |
da7f71d7 MD |
3064 | do |
3065 | { | |
3066 | t.arg1 = EVALCAR (x, env); | |
3067 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, t.arg1))) | |
3068 | RETURN (SCM_BOOL_F) | |
3069 | arg2 = t.arg1; | |
3070 | x = SCM_CDR (x); | |
3071 | } | |
3072 | while (SCM_NIMP (x)); | |
71d3aa6d MD |
3073 | RETURN (SCM_BOOL_T) |
3074 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 | 3075 | RETURN (SCM_APPLY (proc, t.arg1, |
680ed4a8 MD |
3076 | scm_acons (arg2, |
3077 | scm_eval_args (x, env, proc), | |
3078 | SCM_EOL))); | |
71d3aa6d | 3079 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3080 | case scm_tc7_lsubr_2: |
680ed4a8 | 3081 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, scm_eval_args (x, env, proc))); |
6dbd0af5 | 3082 | case scm_tc7_lsubr: |
680ed4a8 MD |
3083 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, |
3084 | arg2, | |
3085 | scm_eval_args (x, env, proc)))); | |
0f2d19dd | 3086 | #ifdef CCLO |
6dbd0af5 MD |
3087 | case scm_tc7_cclo: |
3088 | goto cclon; | |
0f2d19dd | 3089 | #endif |
89efbff4 MD |
3090 | case scm_tc7_pws: |
3091 | proc = SCM_PROCEDURE (proc); | |
3092 | goto evap3; | |
6dbd0af5 MD |
3093 | case scm_tcs_closures: |
3094 | #ifdef DEVAL | |
b7ff98dd | 3095 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 3096 | #endif |
e2806c10 | 3097 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
680ed4a8 MD |
3098 | scm_cons2 (t.arg1, |
3099 | arg2, | |
3100 | scm_eval_args (x, env, proc)), | |
6dbd0af5 MD |
3101 | SCM_ENV (proc)); |
3102 | x = SCM_CODE (proc); | |
3103 | goto cdrxbegin; | |
0f2d19dd | 3104 | #endif /* DEVAL */ |
0c32d76c | 3105 | case scm_tcs_cons_gloc: |
f3d2630a MD |
3106 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3107 | { | |
3108 | #ifdef DEVAL | |
3109 | arg2 = debug.info->a.args; | |
3110 | #else | |
3111 | arg2 = scm_cons2 (t.arg1, arg2, scm_eval_args (x, env, proc)); | |
3112 | #endif | |
195847fa | 3113 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
3114 | goto type_dispatch; |
3115 | } | |
3116 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3117 | goto badfun; |
3118 | else | |
195847fa | 3119 | goto operatorn; |
6dbd0af5 MD |
3120 | case scm_tc7_subr_2: |
3121 | case scm_tc7_subr_1o: | |
3122 | case scm_tc7_subr_2o: | |
3123 | case scm_tc7_subr_0: | |
3124 | case scm_tc7_cxr: | |
3125 | case scm_tc7_subr_1: | |
3126 | case scm_tc7_contin: | |
3127 | goto wrongnumargs; | |
3128 | default: | |
3129 | goto badfun; | |
3130 | } | |
0f2d19dd JB |
3131 | } |
3132 | #ifdef DEVAL | |
6dbd0af5 | 3133 | exit: |
b6d75948 | 3134 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3135 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3136 | { |
b7ff98dd MD |
3137 | SCM_CLEAR_TRACED_FRAME (debug); |
3138 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3139 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3140 | else |
3141 | { | |
3142 | scm_make_cont (&t.arg1); | |
ca6ef71a | 3143 | if (setjmp (SCM_JMPBUF (t.arg1))) |
6dbd0af5 MD |
3144 | { |
3145 | proc = SCM_THROW_VALUE (t.arg1); | |
3146 | goto ret; | |
3147 | } | |
3148 | } | |
2f0d1375 | 3149 | scm_ithrow (scm_sym_exit_frame, scm_cons2 (t.arg1, proc, SCM_EOL), 0); |
6dbd0af5 MD |
3150 | } |
3151 | ret: | |
1646d37b | 3152 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3153 | return proc; |
3154 | #endif | |
3155 | } | |
3156 | ||
6dbd0af5 MD |
3157 | |
3158 | /* SECTION: This code is compiled once. | |
3159 | */ | |
3160 | ||
0f2d19dd JB |
3161 | #ifndef DEVAL |
3162 | ||
82a2622a | 3163 | /* This code processes the arguments to apply: |
b145c172 JB |
3164 | |
3165 | (apply PROC ARG1 ... ARGS) | |
3166 | ||
82a2622a JB |
3167 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3168 | ... arguments onto the front of ARGS, and returns the resulting | |
3169 | list. Note that ARGS is a list; thus, the argument to this | |
3170 | function is a list whose last element is a list. | |
3171 | ||
3172 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3173 | result. apply:nconc2last takes care of building the list of |
3174 | arguments, given (ARG1 ... ARGS). | |
3175 | ||
82a2622a JB |
3176 | Rather than do new consing, apply:nconc2last destroys its argument. |
3177 | On that topic, this code came into my care with the following | |
3178 | beautifully cryptic comment on that topic: "This will only screw | |
3179 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3180 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3181 | |
a1ec6916 | 3182 | SCM_DEFINE(scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
1bbd0b84 GB |
3183 | (SCM lst), |
3184 | "") | |
3185 | #define FUNC_NAME s_scm_nconc2last | |
0f2d19dd JB |
3186 | { |
3187 | SCM *lloc; | |
1bbd0b84 | 3188 | SCM_VALIDATE_LIST(1,lst); |
0f2d19dd JB |
3189 | lloc = &lst; |
3190 | while (SCM_NNULLP (SCM_CDR (*lloc))) | |
a23afe53 | 3191 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 3192 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
3193 | *lloc = SCM_CAR (*lloc); |
3194 | return lst; | |
3195 | } | |
1bbd0b84 | 3196 | #undef FUNC_NAME |
0f2d19dd JB |
3197 | |
3198 | #endif /* !DEVAL */ | |
3199 | ||
6dbd0af5 MD |
3200 | |
3201 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3202 | * It is compiled twice. | |
3203 | */ | |
3204 | ||
0f2d19dd | 3205 | #if 0 |
1cc91f1b | 3206 | |
0f2d19dd | 3207 | SCM |
6e8d25a6 | 3208 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3209 | {} |
3210 | #endif | |
3211 | ||
3212 | #if 0 | |
1cc91f1b | 3213 | |
0f2d19dd | 3214 | SCM |
6e8d25a6 GB |
3215 | scm_dapply (SCM proc, SCM arg1, SCM args) |
3216 | { /* empty */ } | |
0f2d19dd JB |
3217 | #endif |
3218 | ||
1cc91f1b | 3219 | |
82a2622a JB |
3220 | /* Apply a function to a list of arguments. |
3221 | ||
3222 | This function is exported to the Scheme level as taking two | |
3223 | required arguments and a tail argument, as if it were: | |
3224 | (lambda (proc arg1 . args) ...) | |
3225 | Thus, if you just have a list of arguments to pass to a procedure, | |
3226 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3227 | args, pass the first as ARG1, then cons any remaining fixed args | |
3228 | onto the front of your argument list, and pass that as ARGS. */ | |
3229 | ||
0f2d19dd | 3230 | SCM |
1bbd0b84 | 3231 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3232 | { |
3233 | #ifdef DEBUG_EXTENSIONS | |
3234 | #ifdef DEVAL | |
6dbd0af5 | 3235 | scm_debug_frame debug; |
c0ab1b8d | 3236 | scm_debug_info debug_vect_body; |
1646d37b | 3237 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3238 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3239 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3240 | debug.vect[0].a.proc = proc; |
3241 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3242 | scm_last_debug_frame = &debug; |
0f2d19dd | 3243 | #else |
b7ff98dd | 3244 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
3245 | return scm_dapply (proc, arg1, args); |
3246 | #endif | |
3247 | #endif | |
3248 | ||
3249 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3250 | |
3251 | /* If ARGS is the empty list, then we're calling apply with only two | |
3252 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3253 | the case, futz with things so that ARG1 is the first argument to | |
3254 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3255 | rest. |
3256 | ||
3257 | Setting the debug apply frame args this way is pretty messy. | |
3258 | Perhaps we should store arg1 and args directly in the frame as | |
3259 | received, and let scm_frame_arguments unpack them, because that's | |
3260 | a relatively rare operation. This works for now; if the Guile | |
3261 | developer archives are still around, see Mikael's post of | |
3262 | 11-Apr-97. */ | |
0f2d19dd JB |
3263 | if (SCM_NULLP (args)) |
3264 | { | |
3265 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3266 | { |
3267 | arg1 = SCM_UNDEFINED; | |
3268 | #ifdef DEVAL | |
3269 | debug.vect[0].a.args = SCM_EOL; | |
3270 | #endif | |
3271 | } | |
0f2d19dd JB |
3272 | else |
3273 | { | |
30000774 JB |
3274 | #ifdef DEVAL |
3275 | debug.vect[0].a.args = arg1; | |
3276 | #endif | |
0f2d19dd JB |
3277 | args = SCM_CDR (arg1); |
3278 | arg1 = SCM_CAR (arg1); | |
3279 | } | |
3280 | } | |
3281 | else | |
3282 | { | |
0c95b57d | 3283 | /* SCM_ASRTGO(SCM_CONSP(args), wrongnumargs); */ |
0f2d19dd | 3284 | args = scm_nconc2last (args); |
30000774 JB |
3285 | #ifdef DEVAL |
3286 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3287 | #endif | |
0f2d19dd | 3288 | } |
0f2d19dd | 3289 | #ifdef DEVAL |
b6d75948 | 3290 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3291 | { |
3292 | SCM tmp; | |
b7ff98dd | 3293 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3294 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3295 | else |
3296 | { | |
3297 | scm_make_cont (&tmp); | |
ca6ef71a | 3298 | if (setjmp (SCM_JMPBUF (tmp))) |
6dbd0af5 MD |
3299 | goto entap; |
3300 | } | |
2f0d1375 | 3301 | scm_ithrow (scm_sym_enter_frame, scm_cons (tmp, SCM_EOL), 0); |
6dbd0af5 MD |
3302 | } |
3303 | entap: | |
3304 | ENTER_APPLY; | |
3305 | #endif | |
3306 | #ifdef CCLO | |
3307 | tail: | |
0f2d19dd JB |
3308 | #endif |
3309 | switch (SCM_TYP7 (proc)) | |
3310 | { | |
3311 | case scm_tc7_subr_2o: | |
3312 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
3313 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3314 | case scm_tc7_subr_2: | |
269861c7 MD |
3315 | SCM_ASRTGO (SCM_NNULLP (args) && SCM_NULLP (SCM_CDR (args)), |
3316 | wrongnumargs); | |
0f2d19dd JB |
3317 | args = SCM_CAR (args); |
3318 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3319 | case scm_tc7_subr_0: | |
3320 | SCM_ASRTGO (SCM_UNBNDP (arg1), wrongnumargs); | |
3321 | RETURN (SCM_SUBRF (proc) ()) | |
3322 | case scm_tc7_subr_1: | |
3323 | case scm_tc7_subr_1o: | |
3324 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
3325 | RETURN (SCM_SUBRF (proc) (arg1)) | |
3326 | case scm_tc7_cxr: | |
3327 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
3328 | #ifdef SCM_FLOATS | |
3329 | if (SCM_SUBRF (proc)) | |
3330 | { | |
6dbd0af5 MD |
3331 | if (SCM_INUMP (arg1)) |
3332 | { | |
3333 | RETURN (scm_makdbl (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)), 0.0)); | |
3334 | } | |
0f2d19dd | 3335 | SCM_ASRTGO (SCM_NIMP (arg1), floerr); |
6dbd0af5 MD |
3336 | if (SCM_REALP (arg1)) |
3337 | { | |
3338 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (SCM_REALPART (arg1)), 0.0)); | |
3339 | } | |
0f2d19dd | 3340 | #ifdef SCM_BIGDIG |
26d5b9b4 | 3341 | if (SCM_BIGP (arg1)) |
0f2d19dd JB |
3342 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (scm_big2dbl (arg1)), 0.0)) |
3343 | #endif | |
3344 | floerr: | |
9de33deb MD |
3345 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
3346 | SCM_ARG1, SCM_CHARS (SCM_SNAME (proc))); | |
0f2d19dd JB |
3347 | } |
3348 | #endif | |
3349 | proc = (SCM) SCM_SNAME (proc); | |
3350 | { | |
3351 | char *chrs = SCM_CHARS (proc) + SCM_LENGTH (proc) - 1; | |
3352 | while ('c' != *--chrs) | |
3353 | { | |
0c95b57d | 3354 | SCM_ASSERT (SCM_CONSP (arg1), |
0f2d19dd JB |
3355 | arg1, SCM_ARG1, SCM_CHARS (proc)); |
3356 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
3357 | } | |
3358 | RETURN (arg1) | |
3359 | } | |
3360 | case scm_tc7_subr_3: | |
3361 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CAR (SCM_CDR (args)))) | |
3362 | case scm_tc7_lsubr: | |
3363 | #ifdef DEVAL | |
6dbd0af5 | 3364 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)) |
0f2d19dd JB |
3365 | #else |
3366 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))) | |
3367 | #endif | |
3368 | case scm_tc7_lsubr_2: | |
0c95b57d | 3369 | SCM_ASRTGO (SCM_CONSP (args), wrongnumargs); |
0f2d19dd JB |
3370 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))) |
3371 | case scm_tc7_asubr: | |
3372 | if (SCM_NULLP (args)) | |
3373 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)) | |
3374 | while (SCM_NIMP (args)) | |
3375 | { | |
3376 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3377 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
3378 | args = SCM_CDR (args); | |
3379 | } | |
3380 | RETURN (arg1); | |
3381 | case scm_tc7_rpsubr: | |
3382 | if (SCM_NULLP (args)) | |
3383 | RETURN (SCM_BOOL_T); | |
3384 | while (SCM_NIMP (args)) | |
3385 | { | |
3386 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3387 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
3388 | RETURN (SCM_BOOL_F); | |
3389 | arg1 = SCM_CAR (args); | |
3390 | args = SCM_CDR (args); | |
3391 | } | |
3392 | RETURN (SCM_BOOL_T); | |
3393 | case scm_tcs_closures: | |
3394 | #ifdef DEVAL | |
6dbd0af5 | 3395 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
3396 | #else |
3397 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3398 | #endif | |
cf7c17e9 | 3399 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
3400 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), arg1)) |
3401 | goto wrongnumargs; | |
3402 | #endif | |
1609038c MD |
3403 | |
3404 | /* Copy argument list */ | |
3405 | if (SCM_IMP (arg1)) | |
3406 | args = arg1; | |
3407 | else | |
3408 | { | |
3409 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
cabe682c | 3410 | while (arg1 = SCM_CDR (arg1), SCM_CONSP (arg1)) |
1609038c MD |
3411 | { |
3412 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
3413 | SCM_UNSPECIFIED)); | |
3414 | tl = SCM_CDR (tl); | |
3415 | } | |
3416 | SCM_SETCDR (tl, arg1); | |
3417 | } | |
3418 | ||
3419 | args = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), args, SCM_ENV (proc)); | |
2ddb0920 | 3420 | proc = SCM_CDR (SCM_CODE (proc)); |
e791c18f MD |
3421 | again: |
3422 | arg1 = proc; | |
3423 | while (SCM_NNULLP (arg1 = SCM_CDR (arg1))) | |
2ddb0920 MD |
3424 | { |
3425 | if (SCM_IMP (SCM_CAR (proc))) | |
3426 | { | |
3427 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3428 | { | |
3429 | proc = scm_m_expand_body (proc, args); | |
e791c18f | 3430 | goto again; |
2ddb0920 | 3431 | } |
2ddb0920 MD |
3432 | } |
3433 | else | |
e791c18f MD |
3434 | SCM_CEVAL (SCM_CAR (proc), args); |
3435 | proc = arg1; | |
2ddb0920 | 3436 | } |
e791c18f | 3437 | RETURN (EVALCAR (proc, args)); |
0f2d19dd JB |
3438 | case scm_tc7_contin: |
3439 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
3440 | scm_call_continuation (proc, arg1); | |
3441 | #ifdef CCLO | |
3442 | case scm_tc7_cclo: | |
3443 | #ifdef DEVAL | |
6dbd0af5 MD |
3444 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
3445 | arg1 = proc; | |
3446 | proc = SCM_CCLO_SUBR (proc); | |
3447 | debug.vect[0].a.proc = proc; | |
3448 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
3449 | #else |
3450 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
3451 | arg1 = proc; |
3452 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3453 | #endif |
0f2d19dd JB |
3454 | goto tail; |
3455 | #endif | |
89efbff4 MD |
3456 | case scm_tc7_pws: |
3457 | proc = SCM_PROCEDURE (proc); | |
3458 | #ifdef DEVAL | |
3459 | debug.vect[0].a.proc = proc; | |
3460 | #endif | |
3461 | goto tail; | |
0c32d76c | 3462 | case scm_tcs_cons_gloc: |
f3d2630a MD |
3463 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3464 | { | |
3465 | #ifdef DEVAL | |
3466 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3467 | #else | |
3468 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3469 | #endif | |
195847fa | 3470 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a MD |
3471 | } |
3472 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3473 | goto badproc; |
3474 | else | |
da7f71d7 MD |
3475 | { |
3476 | #ifdef DEVAL | |
3477 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3478 | #else | |
3479 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3480 | #endif | |
3481 | arg1 = proc; | |
195847fa MD |
3482 | proc = (SCM_I_ENTITYP (proc) |
3483 | ? SCM_ENTITY_PROCEDURE (proc) | |
3484 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
3485 | #ifdef DEVAL |
3486 | debug.vect[0].a.proc = proc; | |
3487 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3488 | #endif | |
195847fa MD |
3489 | if (SCM_NIMP (proc)) |
3490 | goto tail; | |
3491 | else | |
3492 | goto badproc; | |
da7f71d7 | 3493 | } |
0f2d19dd | 3494 | wrongnumargs: |
f5bf2977 | 3495 | scm_wrong_num_args (proc); |
0f2d19dd JB |
3496 | default: |
3497 | badproc: | |
3498 | scm_wta (proc, (char *) SCM_ARG1, "apply"); | |
3499 | RETURN (arg1); | |
3500 | } | |
3501 | #ifdef DEVAL | |
6dbd0af5 | 3502 | exit: |
b6d75948 | 3503 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3504 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3505 | { |
b7ff98dd MD |
3506 | SCM_CLEAR_TRACED_FRAME (debug); |
3507 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3508 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3509 | else |
3510 | { | |
3511 | scm_make_cont (&arg1); | |
ca6ef71a | 3512 | if (setjmp (SCM_JMPBUF (arg1))) |
6dbd0af5 MD |
3513 | { |
3514 | proc = SCM_THROW_VALUE (arg1); | |
3515 | goto ret; | |
3516 | } | |
3517 | } | |
2f0d1375 | 3518 | scm_ithrow (scm_sym_exit_frame, scm_cons2 (arg1, proc, SCM_EOL), 0); |
6dbd0af5 MD |
3519 | } |
3520 | ret: | |
1646d37b | 3521 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3522 | return proc; |
3523 | #endif | |
3524 | } | |
3525 | ||
6dbd0af5 MD |
3526 | |
3527 | /* SECTION: The rest of this file is only read once. | |
3528 | */ | |
3529 | ||
0f2d19dd JB |
3530 | #ifndef DEVAL |
3531 | ||
d9c393f5 JB |
3532 | /* Typechecking for multi-argument MAP and FOR-EACH. |
3533 | ||
47c3f06d | 3534 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 3535 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 3536 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 3537 | static inline void |
47c3f06d MD |
3538 | check_map_args (SCM argv, |
3539 | long len, | |
3540 | SCM gf, | |
3541 | SCM proc, | |
3542 | SCM args, | |
3543 | const char *who) | |
d9c393f5 | 3544 | { |
47c3f06d | 3545 | SCM *ve = SCM_VELTS (argv); |
d9c393f5 JB |
3546 | int i; |
3547 | ||
47c3f06d | 3548 | for (i = SCM_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 JB |
3549 | { |
3550 | int elt_len = scm_ilength (ve[i]); | |
3551 | ||
3552 | if (elt_len < 0) | |
47c3f06d MD |
3553 | { |
3554 | if (gf) | |
3555 | scm_apply_generic (gf, scm_cons (proc, args)); | |
3556 | else | |
3557 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
3558 | } | |
d9c393f5 JB |
3559 | |
3560 | if (elt_len != len) | |
3561 | scm_out_of_range (who, ve[i]); | |
3562 | } | |
3563 | ||
47c3f06d | 3564 | scm_remember (&argv); |
d9c393f5 JB |
3565 | } |
3566 | ||
3567 | ||
47c3f06d | 3568 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 3569 | |
368bf056 MD |
3570 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3571 | sequentially, starting with the first element(s). This is used in | |
3572 | evalext.c where the Scheme procedure `serial-map', which guarantees | |
3573 | sequential behaviour, is implemented using scm_map. If the | |
3574 | behaviour changes, we need to update `serial-map'. | |
3575 | */ | |
3576 | ||
0f2d19dd | 3577 | SCM |
1bbd0b84 | 3578 | scm_map (SCM proc, SCM arg1, SCM args) |
0f2d19dd | 3579 | { |
d9c393f5 | 3580 | long i, len; |
0f2d19dd JB |
3581 | SCM res = SCM_EOL; |
3582 | SCM *pres = &res; | |
3583 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3584 | ||
3585 | if (SCM_NULLP (arg1)) | |
3586 | return res; | |
d9c393f5 | 3587 | len = scm_ilength (arg1); |
47c3f06d MD |
3588 | SCM_GASSERTn (len >= 0, |
3589 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
0f2d19dd JB |
3590 | if (SCM_NULLP (args)) |
3591 | { | |
3592 | while (SCM_NIMP (arg1)) | |
3593 | { | |
47c3f06d MD |
3594 | SCM_GASSERT2 (SCM_CONSP (arg1), g_map, proc, arg1, SCM_ARG2, s_map); |
3595 | *pres = scm_cons (scm_apply (proc, SCM_CAR (arg1), scm_listofnull), | |
3596 | SCM_EOL); | |
a23afe53 | 3597 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3598 | arg1 = SCM_CDR (arg1); |
3599 | } | |
3600 | return res; | |
3601 | } | |
47c3f06d | 3602 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3603 | ve = SCM_VELTS (args); |
cf7c17e9 | 3604 | #ifndef SCM_RECKLESS |
47c3f06d | 3605 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
3606 | #endif |
3607 | while (1) | |
3608 | { | |
3609 | arg1 = SCM_EOL; | |
3610 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
3611 | { | |
d9c393f5 JB |
3612 | if (SCM_IMP (ve[i])) |
3613 | return res; | |
0f2d19dd JB |
3614 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
3615 | ve[i] = SCM_CDR (ve[i]); | |
3616 | } | |
3617 | *pres = scm_cons (scm_apply (proc, arg1, SCM_EOL), SCM_EOL); | |
a23afe53 | 3618 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3619 | } |
3620 | } | |
3621 | ||
3622 | ||
47c3f06d | 3623 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 3624 | |
0f2d19dd | 3625 | SCM |
1bbd0b84 | 3626 | scm_for_each (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3627 | { |
3628 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
d9c393f5 | 3629 | long i, len; |
0f2d19dd JB |
3630 | if SCM_NULLP (arg1) |
3631 | return SCM_UNSPECIFIED; | |
d9c393f5 | 3632 | len = scm_ilength (arg1); |
47c3f06d MD |
3633 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
3634 | SCM_ARG2, s_for_each); | |
0f2d19dd JB |
3635 | if SCM_NULLP (args) |
3636 | { | |
3637 | while SCM_NIMP (arg1) | |
3638 | { | |
47c3f06d MD |
3639 | SCM_GASSERT2 (SCM_CONSP (arg1), |
3640 | g_for_each, proc, arg1, SCM_ARG2, s_for_each); | |
0f2d19dd JB |
3641 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); |
3642 | arg1 = SCM_CDR (arg1); | |
3643 | } | |
3644 | return SCM_UNSPECIFIED; | |
3645 | } | |
47c3f06d | 3646 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3647 | ve = SCM_VELTS (args); |
cf7c17e9 | 3648 | #ifndef SCM_RECKLESS |
47c3f06d | 3649 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
3650 | #endif |
3651 | while (1) | |
3652 | { | |
3653 | arg1 = SCM_EOL; | |
3654 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
3655 | { | |
3656 | if SCM_IMP | |
3657 | (ve[i]) return SCM_UNSPECIFIED; | |
3658 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3659 | ve[i] = SCM_CDR (ve[i]); | |
3660 | } | |
3661 | scm_apply (proc, arg1, SCM_EOL); | |
3662 | } | |
3663 | } | |
3664 | ||
3665 | ||
1cc91f1b | 3666 | |
0f2d19dd | 3667 | SCM |
6e8d25a6 | 3668 | scm_closure (SCM code, SCM env) |
0f2d19dd JB |
3669 | { |
3670 | register SCM z; | |
3671 | SCM_NEWCELL (z); | |
3672 | SCM_SETCODE (z, code); | |
a23afe53 | 3673 | SCM_SETENV (z, env); |
0f2d19dd JB |
3674 | return z; |
3675 | } | |
3676 | ||
3677 | ||
3678 | long scm_tc16_promise; | |
1cc91f1b | 3679 | |
0f2d19dd | 3680 | SCM |
6e8d25a6 | 3681 | scm_makprom (SCM code) |
0f2d19dd | 3682 | { |
23a62151 | 3683 | SCM_RETURN_NEWSMOB (scm_tc16_promise, code); |
0f2d19dd JB |
3684 | } |
3685 | ||
3686 | ||
1cc91f1b | 3687 | |
0f2d19dd | 3688 | static int |
1bbd0b84 | 3689 | prinprom (SCM exp,SCM port,scm_print_state *pstate) |
0f2d19dd | 3690 | { |
19402679 | 3691 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 3692 | scm_puts ("#<promise ", port); |
19402679 MD |
3693 | SCM_SET_WRITINGP (pstate, 1); |
3694 | scm_iprin1 (SCM_CDR (exp), port, pstate); | |
3695 | SCM_SET_WRITINGP (pstate, writingp); | |
b7f3516f | 3696 | scm_putc ('>', port); |
0f2d19dd JB |
3697 | return !0; |
3698 | } | |
3699 | ||
3700 | ||
a1ec6916 | 3701 | SCM_DEFINE(scm_force, "force", 1, 0, 0, |
1bbd0b84 GB |
3702 | (SCM x), |
3703 | "") | |
3704 | #define FUNC_NAME s_scm_force | |
0f2d19dd | 3705 | { |
1bbd0b84 | 3706 | SCM_VALIDATE_SMOB(1,x,promise); |
0f2d19dd JB |
3707 | if (!((1L << 16) & SCM_CAR (x))) |
3708 | { | |
3709 | SCM ans = scm_apply (SCM_CDR (x), SCM_EOL, SCM_EOL); | |
3710 | if (!((1L << 16) & SCM_CAR (x))) | |
3711 | { | |
3712 | SCM_DEFER_INTS; | |
a23afe53 MD |
3713 | SCM_SETCDR (x, ans); |
3714 | SCM_SETOR_CAR (x, (1L << 16)); | |
0f2d19dd JB |
3715 | SCM_ALLOW_INTS; |
3716 | } | |
3717 | } | |
3718 | return SCM_CDR (x); | |
3719 | } | |
1bbd0b84 | 3720 | #undef FUNC_NAME |
0f2d19dd | 3721 | |
a1ec6916 | 3722 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
1bbd0b84 | 3723 | (SCM x), |
4079f87e GB |
3724 | "Return true if @var{obj} is a promise, i.e. a delayed computation |
3725 | (@pxref{Delayed evaluation,,,r4rs.info,The Revised^4 Report on Scheme}).") | |
1bbd0b84 | 3726 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 3727 | { |
1bbd0b84 | 3728 | return SCM_BOOL(SCM_NIMP (x) && (SCM_TYP16 (x) == scm_tc16_promise)); |
0f2d19dd | 3729 | } |
1bbd0b84 | 3730 | #undef FUNC_NAME |
0f2d19dd | 3731 | |
a1ec6916 | 3732 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 GB |
3733 | (SCM xorig, SCM x, SCM y), |
3734 | "") | |
3735 | #define FUNC_NAME s_scm_cons_source | |
26d5b9b4 MD |
3736 | { |
3737 | SCM p, z; | |
3738 | SCM_NEWCELL (z); | |
3739 | SCM_SETCAR (z, x); | |
3740 | SCM_SETCDR (z, y); | |
3741 | /* Copy source properties possibly associated with xorig. */ | |
3742 | p = scm_whash_lookup (scm_source_whash, xorig); | |
3743 | if (SCM_NIMP (p)) | |
3744 | scm_whash_insert (scm_source_whash, z, p); | |
3745 | return z; | |
3746 | } | |
1bbd0b84 | 3747 | #undef FUNC_NAME |
26d5b9b4 | 3748 | |
a1ec6916 | 3749 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 3750 | (SCM obj), |
4079f87e GB |
3751 | "Recursively copy the data tree that is bound to @var{obj}, and return a |
3752 | pointer to the new data structure. @code{copy-tree} recurses down the | |
3753 | contents of both pairs and vectors (since both cons cells and vector | |
3754 | cells may point to arbitrary objects), and stops recursing when it hits | |
3755 | any other object.") | |
1bbd0b84 | 3756 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
3757 | { |
3758 | SCM ans, tl; | |
26d5b9b4 | 3759 | if (SCM_IMP (obj)) |
ff467021 | 3760 | return obj; |
3910272e MD |
3761 | if (SCM_VECTORP (obj)) |
3762 | { | |
3763 | scm_sizet i = SCM_LENGTH (obj); | |
3764 | ans = scm_make_vector (SCM_MAKINUM (i), SCM_UNSPECIFIED); | |
3765 | while (i--) | |
3766 | SCM_VELTS (ans)[i] = scm_copy_tree (SCM_VELTS (obj)[i]); | |
3767 | return ans; | |
3768 | } | |
ff467021 | 3769 | if (SCM_NCONSP (obj)) |
0f2d19dd JB |
3770 | return obj; |
3771 | /* return scm_cons(scm_copy_tree(SCM_CAR(obj)), scm_copy_tree(SCM_CDR(obj))); */ | |
26d5b9b4 MD |
3772 | ans = tl = scm_cons_source (obj, |
3773 | scm_copy_tree (SCM_CAR (obj)), | |
3774 | SCM_UNSPECIFIED); | |
cabe682c | 3775 | while (obj = SCM_CDR (obj), SCM_CONSP (obj)) |
a23afe53 MD |
3776 | { |
3777 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
3778 | SCM_UNSPECIFIED)); | |
3779 | tl = SCM_CDR (tl); | |
3780 | } | |
3781 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
3782 | return ans; |
3783 | } | |
1bbd0b84 | 3784 | #undef FUNC_NAME |
0f2d19dd | 3785 | |
1cc91f1b | 3786 | |
0f2d19dd | 3787 | SCM |
1bbd0b84 | 3788 | scm_eval_3 (SCM obj, int copyp, SCM env) |
0f2d19dd JB |
3789 | { |
3790 | if (SCM_NIMP (SCM_CDR (scm_system_transformer))) | |
3791 | obj = scm_apply (SCM_CDR (scm_system_transformer), obj, scm_listofnull); | |
3792 | else if (copyp) | |
3793 | obj = scm_copy_tree (obj); | |
6cb702da | 3794 | return SCM_XEVAL (obj, env); |
0f2d19dd JB |
3795 | } |
3796 | ||
a1ec6916 | 3797 | SCM_DEFINE(scm_eval2, "eval2", 2, 0, 0, |
1bbd0b84 | 3798 | (SCM obj, SCM env_thunk), |
4079f87e GB |
3799 | "Evaluate @var{exp}, a Scheme expression, in the environment designated |
3800 | by @var{lookup}, a symbol-lookup function. @code{(eval exp)} is | |
3801 | equivalent to @code{(eval2 exp *top-level-lookup-closure*)}.") | |
1bbd0b84 | 3802 | #define FUNC_NAME s_scm_eval2 |
0f2d19dd | 3803 | { |
6bcb0868 | 3804 | return scm_eval_3 (obj, 1, scm_top_level_env (env_thunk)); |
0f2d19dd | 3805 | } |
1bbd0b84 | 3806 | #undef FUNC_NAME |
0f2d19dd | 3807 | |
a1ec6916 | 3808 | SCM_DEFINE(scm_eval, "eval", 1, 0, 0, |
1bbd0b84 | 3809 | (SCM obj), |
4079f87e GB |
3810 | "Evaluate @var{exp}, a list representing a Scheme expression, in the |
3811 | top-level environment.") | |
1bbd0b84 | 3812 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 3813 | { |
6bcb0868 MD |
3814 | return scm_eval_3 (obj, |
3815 | 1, | |
3816 | scm_top_level_env | |
3817 | (SCM_CDR (scm_top_level_lookup_closure_var))); | |
0f2d19dd | 3818 | } |
1bbd0b84 | 3819 | #undef FUNC_NAME |
0f2d19dd | 3820 | |
1bbd0b84 GB |
3821 | /* |
3822 | SCM_REGISTER_PROC(s_eval_x, "eval!", 1, 0, 0, scm_eval_x); | |
3823 | */ | |
1cc91f1b | 3824 | |
0f2d19dd | 3825 | SCM |
1bbd0b84 | 3826 | scm_eval_x (SCM obj) |
0f2d19dd | 3827 | { |
6bcb0868 MD |
3828 | return scm_eval_3 (obj, |
3829 | 0, | |
3830 | scm_top_level_env | |
3831 | (SCM_CDR (scm_top_level_lookup_closure_var))); | |
0f2d19dd JB |
3832 | } |
3833 | ||
6dbd0af5 MD |
3834 | |
3835 | /* At this point, scm_deval and scm_dapply are generated. | |
3836 | */ | |
3837 | ||
0f2d19dd | 3838 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
3839 | # define DEVAL |
3840 | # include "eval.c" | |
0f2d19dd JB |
3841 | #endif |
3842 | ||
3843 | ||
1cc91f1b | 3844 | |
0f2d19dd JB |
3845 | void |
3846 | scm_init_eval () | |
0f2d19dd | 3847 | { |
33b97402 MD |
3848 | scm_init_opts (scm_evaluator_traps, |
3849 | scm_evaluator_trap_table, | |
3850 | SCM_N_EVALUATOR_TRAPS); | |
3851 | scm_init_opts (scm_eval_options_interface, | |
3852 | scm_eval_opts, | |
3853 | SCM_N_EVAL_OPTIONS); | |
3854 | ||
f99c9c28 MD |
3855 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
3856 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
3857 | scm_set_smob_print (scm_tc16_promise, prinprom); | |
b8229a3b | 3858 | |
81123e6d | 3859 | scm_f_apply = scm_make_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
0f2d19dd | 3860 | scm_system_transformer = scm_sysintern ("scm:eval-transformer", SCM_UNDEFINED); |
2f0d1375 MD |
3861 | scm_sym_dot = SCM_CAR (scm_sysintern (".", SCM_UNDEFINED)); |
3862 | scm_sym_arrow = SCM_CAR (scm_sysintern ("=>", SCM_UNDEFINED)); | |
3863 | scm_sym_else = SCM_CAR (scm_sysintern ("else", SCM_UNDEFINED)); | |
3864 | scm_sym_unquote = SCM_CAR (scm_sysintern ("unquote", SCM_UNDEFINED)); | |
3865 | scm_sym_uq_splicing = SCM_CAR (scm_sysintern ("unquote-splicing", SCM_UNDEFINED)); | |
0f2d19dd | 3866 | |
73b64342 MD |
3867 | scm_nil = scm_sysintern ("nil", SCM_UNDEFINED); |
3868 | SCM_SETCDR (scm_nil, SCM_CAR (scm_nil)); | |
3869 | scm_nil = SCM_CAR (scm_nil); | |
3870 | scm_t = scm_sysintern ("t", SCM_UNDEFINED); | |
3871 | SCM_SETCDR (scm_t, SCM_CAR (scm_t)); | |
3872 | scm_t = SCM_CAR (scm_t); | |
73b64342 | 3873 | |
0f2d19dd | 3874 | /* acros */ |
0f2d19dd JB |
3875 | /* end of acros */ |
3876 | ||
dc19d1d2 JB |
3877 | scm_top_level_lookup_closure_var = |
3878 | scm_sysintern("*top-level-lookup-closure*", SCM_BOOL_F); | |
9b8d3288 | 3879 | scm_can_use_top_level_lookup_closure_var = 1; |
0f2d19dd | 3880 | |
6dbd0af5 | 3881 | #ifdef DEBUG_EXTENSIONS |
2f0d1375 MD |
3882 | scm_sym_enter_frame = SCM_CAR (scm_sysintern ("enter-frame", SCM_UNDEFINED)); |
3883 | scm_sym_apply_frame = SCM_CAR (scm_sysintern ("apply-frame", SCM_UNDEFINED)); | |
3884 | scm_sym_exit_frame = SCM_CAR (scm_sysintern ("exit-frame", SCM_UNDEFINED)); | |
3885 | scm_sym_trace = SCM_CAR (scm_sysintern ("trace", SCM_UNDEFINED)); | |
6dbd0af5 MD |
3886 | #endif |
3887 | ||
0f2d19dd | 3888 | #include "eval.x" |
25eaf21a MD |
3889 | |
3890 | scm_add_feature ("delay"); | |
0f2d19dd | 3891 | } |
0f2d19dd | 3892 | |
6dbd0af5 | 3893 | #endif /* !DEVAL */ |