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7dc6e754 | 1 | /* Copyright (C) 1995,1996,1997,1998 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. */ |
0f2d19dd JB |
41 | \f |
42 | ||
6dbd0af5 MD |
43 | /* This file is read twice in order to produce debugging versions of |
44 | * scm_ceval and scm_apply. These functions, scm_deval and | |
45 | * scm_dapply, are produced when we define the preprocessor macro | |
46 | * DEVAL. The file is divided into sections which are treated | |
47 | * differently with respect to DEVAL. The heads of these sections are | |
48 | * marked with the string "SECTION:". | |
49 | */ | |
50 | ||
51 | ||
52 | /* SECTION: This code is compiled once. | |
0f2d19dd JB |
53 | */ |
54 | ||
55 | #ifndef DEVAL | |
56 | ||
d16332b3 JB |
57 | /* We need this to get the definitions for HAVE_ALLOCA_H, etc. */ |
58 | #include "scmconfig.h" | |
59 | ||
48b96f4b JB |
60 | /* AIX requires this to be the first thing in the file. The #pragma |
61 | directive is indented so pre-ANSI compilers will ignore it, rather | |
62 | than choke on it. */ | |
5862b540 | 63 | #ifndef __GNUC__ |
48b96f4b JB |
64 | # if HAVE_ALLOCA_H |
65 | # include <alloca.h> | |
66 | # else | |
67 | # ifdef _AIX | |
68 | #pragma alloca | |
69 | # else | |
70 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
71 | char *alloca (); | |
72 | # endif | |
73 | # endif | |
74 | # endif | |
75 | #endif | |
76 | ||
0f2d19dd JB |
77 | #include <stdio.h> |
78 | #include "_scm.h" | |
20e6290e | 79 | #include "debug.h" |
20e6290e | 80 | #include "alist.h" |
20e6290e JB |
81 | #include "eq.h" |
82 | #include "continuations.h" | |
83 | #include "throw.h" | |
84 | #include "smob.h" | |
85 | #include "markers.h" | |
6cb702da | 86 | #include "macros.h" |
20e6290e JB |
87 | #include "procprop.h" |
88 | #include "hashtab.h" | |
ac46ab16 | 89 | #include "hash.h" |
20e6290e JB |
90 | #include "srcprop.h" |
91 | #include "stackchk.h" | |
0c32d76c MD |
92 | #include "objects.h" |
93 | #include "feature.h" | |
20e6290e JB |
94 | |
95 | #include "eval.h" | |
0f2d19dd JB |
96 | \f |
97 | ||
6dbd0af5 MD |
98 | /* The evaluator contains a plethora of EVAL symbols. |
99 | * This is an attempt at explanation. | |
100 | * | |
101 | * The following macros should be used in code which is read twice | |
102 | * (where the choice of evaluator is hard soldered): | |
103 | * | |
104 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
105 | * Originally, it is defined to scm_ceval, but is redefined to | |
106 | * scm_deval during the second pass. | |
107 | * | |
108 | * SIDEVAL corresponds to SCM_CEVAL, but is used in situations where | |
109 | * only side effects of expressions matter. All immediates are | |
110 | * ignored. | |
111 | * | |
6cb702da | 112 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
113 | * immediate. (This macro never calls an evaluator.) |
114 | * | |
115 | * EVALCAR evaluates the car of an expression. | |
116 | * | |
117 | * EVALCELLCAR is like EVALCAR, but is used when it is known that the | |
118 | * car is a lisp cell. | |
119 | * | |
120 | * The following macros should be used in code which is read once | |
121 | * (where the choice of evaluator is dynamic): | |
122 | * | |
6cb702da | 123 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
124 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
125 | * mode. | |
126 | * | |
6cb702da | 127 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
128 | * depending on the debugging mode. |
129 | * | |
130 | * The main motivation for keeping this plethora is efficiency | |
131 | * together with maintainability (=> locality of code). | |
132 | */ | |
133 | ||
6cb702da MD |
134 | #define SCM_CEVAL scm_ceval |
135 | #define SIDEVAL(x, env) if SCM_NIMP(x) SCM_CEVAL((x), (env)) | |
136 | ||
0f2d19dd JB |
137 | #define EVALCELLCAR(x, env) (SCM_SYMBOLP (SCM_CAR(x)) \ |
138 | ? *scm_lookupcar(x, env) \ | |
139 | : SCM_CEVAL(SCM_CAR(x), env)) | |
140 | ||
0f2d19dd JB |
141 | #define EVALCAR(x, env) (SCM_NCELLP(SCM_CAR(x))\ |
142 | ? (SCM_IMP(SCM_CAR(x)) \ | |
6cb702da | 143 | ? SCM_EVALIM(SCM_CAR(x), env) \ |
0f2d19dd JB |
144 | : SCM_GLOC_VAL(SCM_CAR(x))) \ |
145 | : EVALCELLCAR(x, env)) | |
0f2d19dd | 146 | |
e2806c10 | 147 | #define EXTEND_ENV SCM_EXTEND_ENV |
0f2d19dd JB |
148 | |
149 | #ifdef MEMOIZE_LOCALS | |
1cc91f1b | 150 | |
0f2d19dd JB |
151 | SCM * |
152 | scm_ilookup (iloc, env) | |
153 | SCM iloc; | |
154 | SCM env; | |
0f2d19dd JB |
155 | { |
156 | register int ir = SCM_IFRAME (iloc); | |
157 | register SCM er = env; | |
158 | for (; 0 != ir; --ir) | |
159 | er = SCM_CDR (er); | |
160 | er = SCM_CAR (er); | |
161 | for (ir = SCM_IDIST (iloc); 0 != ir; --ir) | |
162 | er = SCM_CDR (er); | |
163 | if (SCM_ICDRP (iloc)) | |
a23afe53 MD |
164 | return SCM_CDRLOC (er); |
165 | return SCM_CARLOC (SCM_CDR (er)); | |
0f2d19dd JB |
166 | } |
167 | #endif | |
168 | ||
f8769b1d MV |
169 | #ifdef USE_THREADS |
170 | ||
171 | /* The Lookup Car Race | |
172 | - by Eva Luator | |
173 | ||
174 | Memoization of variables and special forms is done while executing | |
175 | the code for the first time. As long as there is only one thread | |
176 | everything is fine, but as soon as two threads execute the same | |
177 | code concurrently `for the first time' they can come into conflict. | |
178 | ||
179 | This memoization includes rewriting variable references into more | |
180 | efficient forms and expanding macros. Furthermore, macro expansion | |
181 | includes `compiling' special forms like `let', `cond', etc. into | |
182 | tree-code instructions. | |
183 | ||
184 | There shouldn't normally be a problem with memoizing local and | |
185 | global variable references (into ilocs and glocs), because all | |
186 | threads will mutate the code in *exactly* the same way and (if I | |
187 | read the C code correctly) it is not possible to observe a half-way | |
188 | mutated cons cell. The lookup procedure can handle this | |
189 | transparently without any critical sections. | |
190 | ||
191 | It is different with macro expansion, because macro expansion | |
192 | happens outside of the lookup procedure and can't be | |
193 | undone. Therefore it can't cope with it. It has to indicate | |
194 | failure when it detects a lost race and hope that the caller can | |
195 | handle it. Luckily, it turns out that this is the case. | |
196 | ||
197 | An example to illustrate this: Suppose that the follwing form will | |
198 | be memoized concurrently by two threads | |
199 | ||
200 | (let ((x 12)) x) | |
201 | ||
202 | Let's first examine the lookup of X in the body. The first thread | |
203 | decides that it has to find the symbol "x" in the environment and | |
204 | starts to scan it. Then the other thread takes over and actually | |
205 | overtakes the first. It looks up "x" and substitutes an | |
206 | appropriate iloc for it. Now the first thread continues and | |
207 | completes its lookup. It comes to exactly the same conclusions as | |
208 | the second one and could - without much ado - just overwrite the | |
209 | iloc with the same iloc. | |
210 | ||
211 | But let's see what will happen when the race occurs while looking | |
212 | up the symbol "let" at the start of the form. It could happen that | |
213 | the second thread interrupts the lookup of the first thread and not | |
214 | only substitutes a gloc for it but goes right ahead and replaces it | |
215 | with the compiled form (#@let* (x 12) x). Now, when the first | |
216 | thread completes its lookup, it would replace the #@let* with a | |
217 | gloc pointing to the "let" binding, effectively reverting the form | |
218 | to (let (x 12) x). This is wrong. It has to detect that it has | |
219 | lost the race and the evaluator has to reconsider the changed form | |
220 | completely. | |
221 | ||
222 | This race condition could be resolved with some kind of traffic | |
223 | light (like mutexes) around scm_lookupcar, but I think that it is | |
224 | best to avoid them in this case. They would serialize memoization | |
225 | completely and because lookup involves calling arbitrary Scheme | |
226 | code (via the lookup-thunk), threads could be blocked for an | |
227 | arbitrary amount of time or even deadlock. But with the current | |
228 | solution a lot of unnecessary work is potentially done. */ | |
229 | ||
230 | /* SCM_LOOKUPCAR1 is was SCM_LOOKUPCAR used to be but is allowed to | |
231 | return NULL to indicate a failed lookup due to some race conditions | |
232 | between threads. This only happens when VLOC is the first cell of | |
233 | a special form that will eventually be memoized (like `let', etc.) | |
234 | In that case the whole lookup is bogus and the caller has to | |
235 | reconsider the complete special form. | |
236 | ||
237 | SCM_LOOKUPCAR is still there, of course. It just calls | |
238 | SCM_LOOKUPCAR1 and aborts on recieving NULL. So SCM_LOOKUPCAR | |
239 | should only be called when it is known that VLOC is not the first | |
240 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
241 | for NULL. I think I've found the only place where this applies. */ | |
242 | ||
243 | #endif /* USE_THREADS */ | |
1cc91f1b | 244 | |
d0b7bad7 | 245 | #ifdef USE_THREADS |
8ecf1f13 JB |
246 | static SCM * |
247 | scm_lookupcar1 (SCM vloc, SCM genv) | |
d0b7bad7 MD |
248 | #else |
249 | SCM * | |
250 | scm_lookupcar (SCM vloc, SCM genv) | |
251 | #endif | |
0f2d19dd JB |
252 | { |
253 | SCM env = genv; | |
e3173f93 JB |
254 | register SCM *al, fl, var = SCM_CAR (vloc); |
255 | #ifdef USE_THREADS | |
256 | register SCM var2 = var; | |
257 | #endif | |
0f2d19dd JB |
258 | #ifdef MEMOIZE_LOCALS |
259 | register SCM iloc = SCM_ILOC00; | |
260 | #endif | |
261 | for (; SCM_NIMP (env); env = SCM_CDR (env)) | |
262 | { | |
263 | if (SCM_BOOL_T == scm_procedure_p (SCM_CAR (env))) | |
264 | break; | |
a23afe53 | 265 | al = SCM_CARLOC (env); |
0f2d19dd JB |
266 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
267 | { | |
268 | if (SCM_NCONSP (fl)) | |
33b97402 | 269 | { |
0f2d19dd JB |
270 | if (fl == var) |
271 | { | |
272 | #ifdef MEMOIZE_LOCALS | |
f8769b1d MV |
273 | #ifdef USE_THREADS |
274 | if (SCM_CAR (vloc) != var) | |
275 | goto race; | |
276 | #endif | |
a23afe53 | 277 | SCM_SETCAR (vloc, iloc + SCM_ICDR); |
0f2d19dd | 278 | #endif |
a23afe53 | 279 | return SCM_CDRLOC (*al); |
0f2d19dd | 280 | } |
33b97402 MD |
281 | else |
282 | break; | |
283 | } | |
a23afe53 | 284 | al = SCM_CDRLOC (*al); |
0f2d19dd JB |
285 | if (SCM_CAR (fl) == var) |
286 | { | |
287 | #ifdef MEMOIZE_LOCALS | |
cf7c17e9 | 288 | #ifndef SCM_RECKLESS /* letrec inits to SCM_UNDEFINED */ |
0f2d19dd JB |
289 | if (SCM_UNBNDP (SCM_CAR (*al))) |
290 | { | |
291 | env = SCM_EOL; | |
292 | goto errout; | |
293 | } | |
f8769b1d MV |
294 | #endif |
295 | #ifdef USE_THREADS | |
296 | if (SCM_CAR (vloc) != var) | |
297 | goto race; | |
0f2d19dd | 298 | #endif |
a23afe53 | 299 | SCM_SETCAR (vloc, iloc); |
0f2d19dd | 300 | #endif |
a23afe53 | 301 | return SCM_CARLOC (*al); |
0f2d19dd JB |
302 | } |
303 | #ifdef MEMOIZE_LOCALS | |
304 | iloc += SCM_IDINC; | |
305 | #endif | |
306 | } | |
307 | #ifdef MEMOIZE_LOCALS | |
308 | iloc = (~SCM_IDSTMSK) & (iloc + SCM_IFRINC); | |
309 | #endif | |
310 | } | |
311 | { | |
312 | SCM top_thunk, vcell; | |
313 | if (SCM_NIMP(env)) | |
314 | { | |
315 | top_thunk = SCM_CAR(env); /* env now refers to a top level env thunk */ | |
316 | env = SCM_CDR (env); | |
317 | } | |
318 | else | |
319 | top_thunk = SCM_BOOL_F; | |
320 | vcell = scm_sym2vcell (var, top_thunk, SCM_BOOL_F); | |
321 | if (vcell == SCM_BOOL_F) | |
322 | goto errout; | |
323 | else | |
324 | var = vcell; | |
325 | } | |
cf7c17e9 | 326 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
327 | if (SCM_NNULLP (env) || SCM_UNBNDP (SCM_CDR (var))) |
328 | { | |
329 | var = SCM_CAR (var); | |
330 | errout: | |
f5bf2977 | 331 | /* scm_everr (vloc, genv,...) */ |
523f5266 GH |
332 | scm_misc_error (NULL, |
333 | SCM_NULLP (env) | |
334 | ? "Unbound variable: %S" | |
335 | : "Damaged environment: %S", | |
336 | scm_listify (var, SCM_UNDEFINED)); | |
0f2d19dd JB |
337 | } |
338 | #endif | |
f8769b1d MV |
339 | #ifdef USE_THREADS |
340 | if (SCM_CAR (vloc) != var2) | |
341 | { | |
342 | /* Some other thread has changed the very cell we are working | |
343 | on. In effect, it must have done our job or messed it up | |
344 | completely. */ | |
345 | race: | |
346 | var = SCM_CAR (vloc); | |
347 | if ((var & 7) == 1) | |
348 | return SCM_GLOC_VAL_LOC (var); | |
349 | #ifdef MEMOIZE_LOCALS | |
350 | if ((var & 127) == (127 & SCM_ILOC00)) | |
351 | return scm_ilookup (var, genv); | |
352 | #endif | |
353 | /* We can't cope with anything else than glocs and ilocs. When | |
354 | a special form has been memoized (i.e. `let' into `#@let') we | |
355 | return NULL and expect the calling function to do the right | |
356 | thing. For the evaluator, this means going back and redoing | |
357 | the dispatch on the car of the form. */ | |
358 | return NULL; | |
359 | } | |
360 | #endif /* USE_THREADS */ | |
361 | ||
a23afe53 | 362 | SCM_SETCAR (vloc, var + 1); |
0f2d19dd | 363 | /* Except wait...what if the var is not a vcell, |
f8769b1d | 364 | * but syntax or something.... */ |
a23afe53 | 365 | return SCM_CDRLOC (var); |
0f2d19dd JB |
366 | } |
367 | ||
f8769b1d MV |
368 | #ifdef USE_THREADS |
369 | SCM * | |
370 | scm_lookupcar (vloc, genv) | |
371 | SCM vloc; | |
372 | SCM genv; | |
373 | { | |
374 | SCM *loc = scm_lookupcar1 (vloc, genv); | |
375 | if (loc == NULL) | |
376 | abort (); | |
377 | return loc; | |
378 | } | |
f8769b1d MV |
379 | #endif |
380 | ||
0f2d19dd | 381 | #define unmemocar scm_unmemocar |
1cc91f1b | 382 | |
0f2d19dd JB |
383 | SCM |
384 | scm_unmemocar (form, env) | |
385 | SCM form; | |
386 | SCM env; | |
0f2d19dd | 387 | { |
6dbd0af5 | 388 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd | 389 | register int ir; |
6dbd0af5 | 390 | #endif |
0f2d19dd JB |
391 | SCM c; |
392 | ||
393 | if (SCM_IMP (form)) | |
394 | return form; | |
395 | c = SCM_CAR (form); | |
396 | if (1 == (c & 7)) | |
a23afe53 | 397 | SCM_SETCAR (form, SCM_CAR (c - 1)); |
0f2d19dd | 398 | #ifdef MEMOIZE_LOCALS |
6dbd0af5 | 399 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd JB |
400 | else if (SCM_ILOCP (c)) |
401 | { | |
402 | for (ir = SCM_IFRAME (c); ir != 0; --ir) | |
403 | env = SCM_CDR (env); | |
404 | env = SCM_CAR (SCM_CAR (env)); | |
405 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
406 | env = SCM_CDR (env); | |
a23afe53 | 407 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); |
0f2d19dd | 408 | } |
6dbd0af5 | 409 | #endif |
0f2d19dd JB |
410 | #endif |
411 | return form; | |
412 | } | |
413 | ||
1cc91f1b | 414 | |
0f2d19dd JB |
415 | SCM |
416 | scm_eval_car (pair, env) | |
417 | SCM pair; | |
418 | SCM env; | |
0f2d19dd | 419 | { |
6cb702da | 420 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
421 | } |
422 | ||
423 | \f | |
424 | /* | |
425 | * The following rewrite expressions and | |
426 | * some memoized forms have different syntax | |
427 | */ | |
428 | ||
6cb702da MD |
429 | char scm_s_expression[] = "missing or extra expression"; |
430 | char scm_s_test[] = "bad test"; | |
431 | char scm_s_body[] = "bad body"; | |
432 | char scm_s_bindings[] = "bad bindings"; | |
433 | char scm_s_variable[] = "bad variable"; | |
434 | char scm_s_clauses[] = "bad or missing clauses"; | |
435 | char scm_s_formals[] = "bad formals"; | |
0f2d19dd JB |
436 | |
437 | SCM scm_i_dot, scm_i_quote, scm_i_quasiquote, scm_i_lambda, scm_i_let, | |
438 | scm_i_arrow, scm_i_else, scm_i_unquote, scm_i_uq_splicing, scm_i_apply; | |
6dbd0af5 MD |
439 | SCM scm_i_define, scm_i_and, scm_i_begin, scm_i_case, scm_i_cond, |
440 | scm_i_do, scm_i_if, scm_i_let, scm_i_letrec, scm_i_letstar, | |
441 | scm_i_or, scm_i_set, scm_i_atapply, scm_i_atcall_cc; | |
0f2d19dd JB |
442 | static char s_quasiquote[] = "quasiquote"; |
443 | static char s_delay[] = "delay"; | |
6dbd0af5 MD |
444 | #ifdef DEBUG_EXTENSIONS |
445 | SCM scm_i_enter_frame, scm_i_apply_frame, scm_i_exit_frame; | |
446 | SCM scm_i_trace; | |
447 | #endif | |
0f2d19dd JB |
448 | |
449 | #define ASRTSYNTAX(cond_, msg_) if(!(cond_))scm_wta(xorig, (msg_), what); | |
450 | ||
451 | ||
1cc91f1b JB |
452 | |
453 | static void bodycheck SCM_P ((SCM xorig, SCM *bodyloc, char *what)); | |
454 | ||
0f2d19dd JB |
455 | static void |
456 | bodycheck (xorig, bodyloc, what) | |
457 | SCM xorig; | |
458 | SCM *bodyloc; | |
459 | char *what; | |
0f2d19dd | 460 | { |
6cb702da | 461 | ASRTSYNTAX (scm_ilength (*bodyloc) >= 1, scm_s_expression); |
0f2d19dd JB |
462 | } |
463 | ||
464 | ||
1cc91f1b | 465 | |
0f2d19dd JB |
466 | SCM |
467 | scm_m_quote (xorig, env) | |
468 | SCM xorig; | |
469 | SCM env; | |
0f2d19dd | 470 | { |
6cb702da MD |
471 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
472 | xorig, scm_s_expression, "quote"); | |
0f2d19dd JB |
473 | return scm_cons (SCM_IM_QUOTE, SCM_CDR (xorig)); |
474 | } | |
475 | ||
476 | ||
1cc91f1b | 477 | |
0f2d19dd JB |
478 | SCM |
479 | scm_m_begin (xorig, env) | |
480 | SCM xorig; | |
481 | SCM env; | |
0f2d19dd | 482 | { |
6cb702da MD |
483 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 1, |
484 | xorig, scm_s_expression, "begin"); | |
0f2d19dd JB |
485 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
486 | } | |
487 | ||
488 | ||
1cc91f1b | 489 | |
0f2d19dd JB |
490 | SCM |
491 | scm_m_if (xorig, env) | |
492 | SCM xorig; | |
493 | SCM env; | |
0f2d19dd JB |
494 | { |
495 | int len = scm_ilength (SCM_CDR (xorig)); | |
6cb702da | 496 | SCM_ASSYNT (len >= 2 && len <= 3, xorig, scm_s_expression, "if"); |
0f2d19dd JB |
497 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
498 | } | |
499 | ||
500 | ||
1cc91f1b | 501 | |
0f2d19dd JB |
502 | SCM |
503 | scm_m_set (xorig, env) | |
504 | SCM xorig; | |
505 | SCM env; | |
0f2d19dd | 506 | { |
6dbd0af5 | 507 | SCM x = SCM_CDR (xorig); |
6cb702da MD |
508 | SCM_ASSYNT (2 == scm_ilength (x), xorig, scm_s_expression, "set!"); |
509 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (x)) && SCM_SYMBOLP (SCM_CAR (x)), | |
510 | xorig, scm_s_variable, "set!"); | |
0f2d19dd JB |
511 | return scm_cons (SCM_IM_SET, x); |
512 | } | |
513 | ||
514 | ||
515 | #if 0 | |
1cc91f1b | 516 | |
0f2d19dd JB |
517 | SCM |
518 | scm_m_vref (xorig, env) | |
519 | SCM xorig; | |
520 | SCM env; | |
0f2d19dd JB |
521 | { |
522 | SCM x = SCM_CDR (xorig); | |
6cb702da | 523 | SCM_ASSYNT (1 == scm_ilength (x), xorig, scm_s_expression, s_vref); |
0f2d19dd JB |
524 | if (SCM_NIMP(x) && UDSCM_VARIABLEP (SCM_CAR (x))) |
525 | { | |
f5bf2977 | 526 | /* scm_everr (SCM_UNDEFINED, env,..., "global variable reference") */ |
523f5266 GH |
527 | scm_misc_error (NULL, |
528 | "Bad variable: %S", | |
529 | scm_listify (SCM_CAR (SCM_CDR (x)), SCM_UNDEFINED)); | |
0f2d19dd | 530 | } |
6cb702da MD |
531 | SCM_ASSYNT (SCM_NIMP(x) && DEFSCM_VARIABLEP (SCM_CAR (x)), |
532 | xorig, scm_s_variable, s_vref); | |
0f2d19dd JB |
533 | return |
534 | return scm_cons (IM_VREF, x); | |
535 | } | |
536 | ||
537 | ||
1cc91f1b | 538 | |
0f2d19dd JB |
539 | SCM |
540 | scm_m_vset (xorig, env) | |
541 | SCM xorig; | |
542 | SCM env; | |
0f2d19dd JB |
543 | { |
544 | SCM x = SCM_CDR (xorig); | |
6cb702da MD |
545 | SCM_ASSYNT (3 == scm_ilength (x), xorig, scm_s_expression, s_vset); |
546 | SCM_ASSYNT ((DEFSCM_VARIABLEP (SCM_CAR (x)) | |
547 | || UDSCM_VARIABLEP (SCM_CAR (x))), | |
548 | xorig, scm_s_variable, s_vset); | |
0f2d19dd JB |
549 | return scm_cons (IM_VSET, x); |
550 | } | |
551 | #endif | |
552 | ||
553 | ||
1cc91f1b | 554 | |
0f2d19dd JB |
555 | SCM |
556 | scm_m_and (xorig, env) | |
557 | SCM xorig; | |
558 | SCM env; | |
0f2d19dd JB |
559 | { |
560 | int len = scm_ilength (SCM_CDR (xorig)); | |
6cb702da | 561 | SCM_ASSYNT (len >= 0, xorig, scm_s_test, "and"); |
0f2d19dd JB |
562 | if (len >= 1) |
563 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); | |
564 | else | |
565 | return SCM_BOOL_T; | |
566 | } | |
567 | ||
568 | ||
1cc91f1b | 569 | |
0f2d19dd JB |
570 | SCM |
571 | scm_m_or (xorig, env) | |
572 | SCM xorig; | |
573 | SCM env; | |
0f2d19dd JB |
574 | { |
575 | int len = scm_ilength (SCM_CDR (xorig)); | |
6cb702da | 576 | SCM_ASSYNT (len >= 0, xorig, scm_s_test, "or"); |
0f2d19dd JB |
577 | if (len >= 1) |
578 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); | |
579 | else | |
580 | return SCM_BOOL_F; | |
581 | } | |
582 | ||
583 | ||
1cc91f1b | 584 | |
0f2d19dd JB |
585 | SCM |
586 | scm_m_case (xorig, env) | |
587 | SCM xorig; | |
588 | SCM env; | |
0f2d19dd JB |
589 | { |
590 | SCM proc, x = SCM_CDR (xorig); | |
6cb702da | 591 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_clauses, "case"); |
0f2d19dd JB |
592 | while (SCM_NIMP (x = SCM_CDR (x))) |
593 | { | |
594 | proc = SCM_CAR (x); | |
6cb702da MD |
595 | SCM_ASSYNT (scm_ilength (proc) >= 2, xorig, scm_s_clauses, "case"); |
596 | SCM_ASSYNT (scm_ilength (SCM_CAR (proc)) >= 0 | |
597 | || scm_i_else == SCM_CAR (proc), | |
598 | xorig, scm_s_clauses, "case"); | |
0f2d19dd JB |
599 | } |
600 | return scm_cons (SCM_IM_CASE, SCM_CDR (xorig)); | |
601 | } | |
602 | ||
603 | ||
1cc91f1b | 604 | |
0f2d19dd JB |
605 | SCM |
606 | scm_m_cond (xorig, env) | |
607 | SCM xorig; | |
608 | SCM env; | |
0f2d19dd JB |
609 | { |
610 | SCM arg1, x = SCM_CDR (xorig); | |
611 | int len = scm_ilength (x); | |
6cb702da | 612 | SCM_ASSYNT (len >= 1, xorig, scm_s_clauses, "cond"); |
0f2d19dd JB |
613 | while (SCM_NIMP (x)) |
614 | { | |
615 | arg1 = SCM_CAR (x); | |
616 | len = scm_ilength (arg1); | |
6cb702da | 617 | SCM_ASSYNT (len >= 1, xorig, scm_s_clauses, "cond"); |
0f2d19dd JB |
618 | if (scm_i_else == SCM_CAR (arg1)) |
619 | { | |
6cb702da MD |
620 | SCM_ASSYNT (SCM_NULLP (SCM_CDR (x)) && len >= 2, |
621 | xorig, "bad ELSE clause", "cond"); | |
a23afe53 | 622 | SCM_SETCAR (arg1, SCM_BOOL_T); |
0f2d19dd JB |
623 | } |
624 | if (len >= 2 && scm_i_arrow == SCM_CAR (SCM_CDR (arg1))) | |
6cb702da MD |
625 | SCM_ASSYNT (3 == len && SCM_NIMP (SCM_CAR (SCM_CDR (SCM_CDR (arg1)))), |
626 | xorig, "bad recipient", "cond"); | |
0f2d19dd JB |
627 | x = SCM_CDR (x); |
628 | } | |
629 | return scm_cons (SCM_IM_COND, SCM_CDR (xorig)); | |
630 | } | |
631 | ||
632 | ||
1cc91f1b | 633 | |
0f2d19dd JB |
634 | SCM |
635 | scm_m_lambda (xorig, env) | |
636 | SCM xorig; | |
637 | SCM env; | |
0f2d19dd JB |
638 | { |
639 | SCM proc, x = SCM_CDR (xorig); | |
640 | if (scm_ilength (x) < 2) | |
641 | goto badforms; | |
642 | proc = SCM_CAR (x); | |
33b97402 MD |
643 | if (SCM_NULLP (proc)) |
644 | goto memlambda; | |
645 | if (SCM_IMP (proc)) | |
646 | goto badforms; | |
647 | if (SCM_SYMBOLP (proc)) | |
648 | goto memlambda; | |
649 | if (SCM_NCONSP (proc)) | |
650 | goto badforms; | |
651 | while (SCM_NIMP (proc)) | |
0f2d19dd | 652 | { |
33b97402 MD |
653 | if (SCM_NCONSP (proc)) |
654 | { | |
0f2d19dd | 655 | if (!SCM_SYMBOLP (proc)) |
33b97402 MD |
656 | goto badforms; |
657 | else | |
658 | goto memlambda; | |
659 | } | |
0f2d19dd JB |
660 | if (!(SCM_NIMP (SCM_CAR (proc)) && SCM_SYMBOLP (SCM_CAR (proc)))) |
661 | goto badforms; | |
662 | proc = SCM_CDR (proc); | |
663 | } | |
664 | if SCM_NNULLP | |
665 | (proc) | |
6cb702da | 666 | badforms:scm_wta (xorig, scm_s_formals, "lambda"); |
0f2d19dd | 667 | memlambda: |
a23afe53 | 668 | bodycheck (xorig, SCM_CDRLOC (x), "lambda"); |
0f2d19dd JB |
669 | return scm_cons (SCM_IM_LAMBDA, SCM_CDR (xorig)); |
670 | } | |
671 | ||
672 | ||
1cc91f1b | 673 | |
0f2d19dd JB |
674 | SCM |
675 | scm_m_letstar (xorig, env) | |
676 | SCM xorig; | |
677 | SCM env; | |
0f2d19dd JB |
678 | { |
679 | SCM x = SCM_CDR (xorig), arg1, proc, vars = SCM_EOL, *varloc = &vars; | |
680 | int len = scm_ilength (x); | |
6cb702da | 681 | SCM_ASSYNT (len >= 2, xorig, scm_s_body, "let*"); |
0f2d19dd | 682 | proc = SCM_CAR (x); |
6cb702da | 683 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, "let*"); |
6dbd0af5 | 684 | while SCM_NIMP (proc) |
0f2d19dd JB |
685 | { |
686 | arg1 = SCM_CAR (proc); | |
6cb702da MD |
687 | SCM_ASSYNT (2 == scm_ilength (arg1), xorig, scm_s_bindings, "let*"); |
688 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), | |
689 | xorig, scm_s_variable, "let*"); | |
0f2d19dd | 690 | *varloc = scm_cons2 (SCM_CAR (arg1), SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 691 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
0f2d19dd JB |
692 | proc = SCM_CDR (proc); |
693 | } | |
694 | x = scm_cons (vars, SCM_CDR (x)); | |
a23afe53 | 695 | bodycheck (xorig, SCM_CDRLOC (x), "let*"); |
0f2d19dd JB |
696 | return scm_cons (SCM_IM_LETSTAR, x); |
697 | } | |
698 | ||
699 | /* DO gets the most radically altered syntax | |
700 | (do ((<var1> <init1> <step1>) | |
701 | (<var2> <init2>) | |
702 | ... ) | |
703 | (<test> <return>) | |
704 | <body>) | |
705 | ;; becomes | |
706 | (do_mem (varn ... var2 var1) | |
707 | (<init1> <init2> ... <initn>) | |
708 | (<test> <return>) | |
709 | (<body>) | |
710 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
711 | */ | |
712 | ||
713 | ||
1cc91f1b | 714 | |
0f2d19dd JB |
715 | SCM |
716 | scm_m_do (xorig, env) | |
717 | SCM xorig; | |
718 | SCM env; | |
0f2d19dd JB |
719 | { |
720 | SCM x = SCM_CDR (xorig), arg1, proc; | |
721 | SCM vars = SCM_EOL, inits = SCM_EOL, steps = SCM_EOL; | |
722 | SCM *initloc = &inits, *steploc = &steps; | |
723 | int len = scm_ilength (x); | |
6cb702da | 724 | SCM_ASSYNT (len >= 2, xorig, scm_s_test, "do"); |
0f2d19dd | 725 | proc = SCM_CAR (x); |
6cb702da | 726 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, "do"); |
0f2d19dd JB |
727 | while SCM_NIMP |
728 | (proc) | |
729 | { | |
730 | arg1 = SCM_CAR (proc); | |
731 | len = scm_ilength (arg1); | |
6cb702da MD |
732 | SCM_ASSYNT (2 == len || 3 == len, xorig, scm_s_bindings, "do"); |
733 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), | |
734 | xorig, scm_s_variable, "do"); | |
0f2d19dd JB |
735 | /* vars reversed here, inits and steps reversed at evaluation */ |
736 | vars = scm_cons (SCM_CAR (arg1), vars); /* variable */ | |
737 | arg1 = SCM_CDR (arg1); | |
738 | *initloc = scm_cons (SCM_CAR (arg1), SCM_EOL); /* init */ | |
a23afe53 | 739 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
740 | arg1 = SCM_CDR (arg1); |
741 | *steploc = scm_cons (SCM_IMP (arg1) ? SCM_CAR (vars) : SCM_CAR (arg1), SCM_EOL); /* step */ | |
a23afe53 | 742 | steploc = SCM_CDRLOC (*steploc); |
0f2d19dd JB |
743 | proc = SCM_CDR (proc); |
744 | } | |
745 | x = SCM_CDR (x); | |
6cb702da | 746 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, xorig, scm_s_test, "do"); |
0f2d19dd JB |
747 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
748 | x = scm_cons2 (vars, inits, x); | |
a23afe53 | 749 | bodycheck (xorig, SCM_CARLOC (SCM_CDR (SCM_CDR (x))), "do"); |
0f2d19dd JB |
750 | return scm_cons (SCM_IM_DO, x); |
751 | } | |
752 | ||
6dbd0af5 MD |
753 | /* evalcar is small version of inline EVALCAR when we don't care about |
754 | * speed | |
755 | */ | |
756 | #define evalcar scm_eval_car | |
0f2d19dd | 757 | |
1cc91f1b JB |
758 | |
759 | static SCM iqq SCM_P ((SCM form, SCM env, int depth)); | |
760 | ||
0f2d19dd JB |
761 | static SCM |
762 | iqq (form, env, depth) | |
763 | SCM form; | |
764 | SCM env; | |
765 | int depth; | |
0f2d19dd JB |
766 | { |
767 | SCM tmp; | |
768 | int edepth = depth; | |
769 | if SCM_IMP | |
770 | (form) return form; | |
771 | if (SCM_VECTORP (form)) | |
772 | { | |
773 | long i = SCM_LENGTH (form); | |
774 | SCM *data = SCM_VELTS (form); | |
775 | tmp = SCM_EOL; | |
776 | for (; --i >= 0;) | |
777 | tmp = scm_cons (data[i], tmp); | |
778 | return scm_vector (iqq (tmp, env, depth)); | |
779 | } | |
780 | if SCM_NCONSP | |
781 | (form) return form; | |
782 | tmp = SCM_CAR (form); | |
783 | if (scm_i_quasiquote == tmp) | |
784 | { | |
785 | depth++; | |
786 | goto label; | |
787 | } | |
788 | if (scm_i_unquote == tmp) | |
789 | { | |
790 | --depth; | |
791 | label: | |
792 | form = SCM_CDR (form); | |
0f2d19dd JB |
793 | SCM_ASSERT (SCM_NIMP (form) && SCM_ECONSP (form) && SCM_NULLP (SCM_CDR (form)), |
794 | form, SCM_ARG1, s_quasiquote); | |
795 | if (0 == depth) | |
796 | return evalcar (form, env); | |
797 | return scm_cons2 (tmp, iqq (SCM_CAR (form), env, depth), SCM_EOL); | |
798 | } | |
799 | if (SCM_NIMP (tmp) && (scm_i_uq_splicing == SCM_CAR (tmp))) | |
800 | { | |
801 | tmp = SCM_CDR (tmp); | |
802 | if (0 == --edepth) | |
803 | return scm_append (scm_cons2 (evalcar (tmp, env), iqq (SCM_CDR (form), env, depth), SCM_EOL)); | |
804 | } | |
805 | return scm_cons (iqq (SCM_CAR (form), env, edepth), iqq (SCM_CDR (form), env, depth)); | |
806 | } | |
807 | ||
808 | /* Here are acros which return values rather than code. */ | |
809 | ||
1cc91f1b | 810 | |
0f2d19dd JB |
811 | SCM |
812 | scm_m_quasiquote (xorig, env) | |
813 | SCM xorig; | |
814 | SCM env; | |
0f2d19dd JB |
815 | { |
816 | SCM x = SCM_CDR (xorig); | |
6cb702da | 817 | SCM_ASSYNT (scm_ilength (x) == 1, xorig, scm_s_expression, s_quasiquote); |
0f2d19dd JB |
818 | return iqq (SCM_CAR (x), env, 1); |
819 | } | |
820 | ||
1cc91f1b | 821 | |
0f2d19dd JB |
822 | SCM |
823 | scm_m_delay (xorig, env) | |
824 | SCM xorig; | |
825 | SCM env; | |
0f2d19dd | 826 | { |
6cb702da | 827 | SCM_ASSYNT (scm_ilength (xorig) == 2, xorig, scm_s_expression, s_delay); |
0f2d19dd JB |
828 | xorig = SCM_CDR (xorig); |
829 | return scm_makprom (scm_closure (scm_cons2 (SCM_EOL, SCM_CAR (xorig), SCM_CDR (xorig)), | |
830 | env)); | |
831 | } | |
832 | ||
1cc91f1b | 833 | |
6cb702da MD |
834 | SCM |
835 | scm_env_top_level (env) | |
0f2d19dd | 836 | SCM env; |
0f2d19dd JB |
837 | { |
838 | while (SCM_NIMP(env)) | |
839 | { | |
840 | if (SCM_BOOL_T == scm_procedure_p (SCM_CAR(env))) | |
841 | return SCM_CAR(env); | |
842 | env = SCM_CDR (env); | |
843 | } | |
844 | return SCM_BOOL_F; | |
845 | } | |
846 | ||
1cc91f1b | 847 | |
0f2d19dd JB |
848 | SCM |
849 | scm_m_define (x, env) | |
850 | SCM x; | |
851 | SCM env; | |
0f2d19dd JB |
852 | { |
853 | SCM proc, arg1 = x; | |
854 | x = SCM_CDR (x); | |
6cb702da MD |
855 | /* SCM_ASSYNT(SCM_NULLP(env), x, "bad placement", s_define);*/ |
856 | SCM_ASSYNT (scm_ilength (x) >= 2, arg1, scm_s_expression, "define"); | |
0f2d19dd JB |
857 | proc = SCM_CAR (x); |
858 | x = SCM_CDR (x); | |
859 | while (SCM_NIMP (proc) && SCM_CONSP (proc)) | |
860 | { /* nested define syntax */ | |
861 | x = scm_cons (scm_cons2 (scm_i_lambda, SCM_CDR (proc), x), SCM_EOL); | |
862 | proc = SCM_CAR (proc); | |
863 | } | |
6cb702da MD |
864 | SCM_ASSYNT (SCM_NIMP (proc) && SCM_SYMBOLP (proc), |
865 | arg1, scm_s_variable, "define"); | |
866 | SCM_ASSYNT (1 == scm_ilength (x), arg1, scm_s_expression, "define"); | |
0f2d19dd JB |
867 | if (SCM_TOP_LEVEL (env)) |
868 | { | |
869 | x = evalcar (x, env); | |
6dbd0af5 | 870 | #ifdef DEBUG_EXTENSIONS |
80ea260c MD |
871 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x)) |
872 | { | |
873 | arg1 = x; | |
874 | proc: | |
875 | if (SCM_CLOSUREP (arg1) | |
876 | /* Only the first definition determines the name. */ | |
877 | && scm_procedure_property (arg1, scm_i_name) == SCM_BOOL_F) | |
878 | scm_set_procedure_property_x (arg1, scm_i_name, proc); | |
879 | else if (SCM_TYP16 (arg1) == scm_tc16_macro | |
880 | && SCM_CDR (arg1) != arg1) | |
881 | { | |
882 | arg1 = SCM_CDR (arg1); | |
883 | goto proc; | |
884 | } | |
885 | } | |
6dbd0af5 | 886 | #endif |
6cb702da | 887 | arg1 = scm_sym2vcell (proc, scm_env_top_level (env), SCM_BOOL_T); |
0f2d19dd | 888 | #if 0 |
cf7c17e9 | 889 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
890 | if (SCM_NIMP (SCM_CDR (arg1)) && ((SCM) SCM_SNAME (SCM_CDR (arg1)) == proc) |
891 | && (SCM_CDR (arg1) != x)) | |
892 | scm_warn ("redefining built-in ", SCM_CHARS (proc)); | |
893 | else | |
894 | #endif | |
895 | if (5 <= scm_verbose && SCM_UNDEFINED != SCM_CDR (arg1)) | |
896 | scm_warn ("redefining ", SCM_CHARS (proc)); | |
0f2d19dd | 897 | #endif |
a23afe53 | 898 | SCM_SETCDR (arg1, x); |
0f2d19dd JB |
899 | #ifdef SICP |
900 | return scm_cons2 (scm_i_quote, SCM_CAR (arg1), SCM_EOL); | |
901 | #else | |
902 | return SCM_UNSPECIFIED; | |
903 | #endif | |
904 | } | |
905 | return scm_cons2 (SCM_IM_DEFINE, proc, x); | |
906 | } | |
6dbd0af5 | 907 | |
0f2d19dd JB |
908 | /* end of acros */ |
909 | ||
1cc91f1b | 910 | |
0f2d19dd JB |
911 | SCM |
912 | scm_m_letrec (xorig, env) | |
913 | SCM xorig; | |
914 | SCM env; | |
0f2d19dd JB |
915 | { |
916 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
917 | char *what = SCM_CHARS (SCM_CAR (xorig)); | |
918 | SCM x = cdrx, proc, arg1; /* structure traversers */ | |
919 | SCM vars = SCM_EOL, inits = SCM_EOL, *initloc = &inits; | |
920 | ||
6cb702da | 921 | ASRTSYNTAX (scm_ilength (x) >= 2, scm_s_body); |
0f2d19dd JB |
922 | proc = SCM_CAR (x); |
923 | if SCM_NULLP | |
924 | (proc) return scm_m_letstar (xorig, env); /* null binding, let* faster */ | |
6cb702da | 925 | ASRTSYNTAX (scm_ilength (proc) >= 1, scm_s_bindings); |
0f2d19dd JB |
926 | do |
927 | { | |
928 | /* vars scm_list reversed here, inits reversed at evaluation */ | |
929 | arg1 = SCM_CAR (proc); | |
6cb702da MD |
930 | ASRTSYNTAX (2 == scm_ilength (arg1), scm_s_bindings); |
931 | ASRTSYNTAX (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable); | |
0f2d19dd JB |
932 | vars = scm_cons (SCM_CAR (arg1), vars); |
933 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); | |
a23afe53 | 934 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
935 | } |
936 | while SCM_NIMP | |
937 | (proc = SCM_CDR (proc)); | |
938 | cdrx = scm_cons2 (vars, inits, SCM_CDR (x)); | |
a23afe53 | 939 | bodycheck (xorig, SCM_CDRLOC (SCM_CDR (cdrx)), what); |
0f2d19dd JB |
940 | return scm_cons (SCM_IM_LETREC, cdrx); |
941 | } | |
942 | ||
1cc91f1b | 943 | |
0f2d19dd JB |
944 | SCM |
945 | scm_m_let (xorig, env) | |
946 | SCM xorig; | |
947 | SCM env; | |
0f2d19dd JB |
948 | { |
949 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
950 | SCM x = cdrx, proc, arg1, name; /* structure traversers */ | |
951 | SCM vars = SCM_EOL, inits = SCM_EOL, *varloc = &vars, *initloc = &inits; | |
952 | ||
6cb702da | 953 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, "let"); |
0f2d19dd JB |
954 | proc = SCM_CAR (x); |
955 | if (SCM_NULLP (proc) | |
956 | || (SCM_NIMP (proc) && SCM_CONSP (proc) | |
957 | && SCM_NIMP (SCM_CAR (proc)) && SCM_CONSP (SCM_CAR (proc)) && SCM_NULLP (SCM_CDR (proc)))) | |
958 | return scm_m_letstar (xorig, env); /* null or single binding, let* is faster */ | |
6cb702da | 959 | SCM_ASSYNT (SCM_NIMP (proc), xorig, scm_s_bindings, "let"); |
0f2d19dd JB |
960 | if (SCM_CONSP (proc)) /* plain let, proc is <bindings> */ |
961 | return scm_cons (SCM_IM_LET, SCM_CDR (scm_m_letrec (xorig, env))); | |
962 | if (!SCM_SYMBOLP (proc)) | |
6cb702da | 963 | scm_wta (xorig, scm_s_bindings, "let"); /* bad let */ |
0f2d19dd JB |
964 | name = proc; /* named let, build equiv letrec */ |
965 | x = SCM_CDR (x); | |
6cb702da | 966 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, "let"); |
0f2d19dd | 967 | proc = SCM_CAR (x); /* bindings scm_list */ |
6cb702da | 968 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, "let"); |
0f2d19dd JB |
969 | while SCM_NIMP |
970 | (proc) | |
971 | { /* vars and inits both in order */ | |
972 | arg1 = SCM_CAR (proc); | |
6cb702da MD |
973 | SCM_ASSYNT (2 == scm_ilength (arg1), xorig, scm_s_bindings, "let"); |
974 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), | |
975 | xorig, scm_s_variable, "let"); | |
0f2d19dd | 976 | *varloc = scm_cons (SCM_CAR (arg1), SCM_EOL); |
a23afe53 | 977 | varloc = SCM_CDRLOC (*varloc); |
0f2d19dd | 978 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 979 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
980 | proc = SCM_CDR (proc); |
981 | } | |
982 | return | |
983 | scm_m_letrec (scm_cons2 (scm_i_let, | |
984 | scm_cons (scm_cons2 (name, scm_cons2 (scm_i_lambda, vars, SCM_CDR (x)), SCM_EOL), SCM_EOL), | |
985 | scm_acons (name, inits, SCM_EOL)), /* body */ | |
986 | env); | |
987 | } | |
988 | ||
989 | ||
1cc91f1b | 990 | |
0f2d19dd JB |
991 | SCM |
992 | scm_m_apply (xorig, env) | |
993 | SCM xorig; | |
994 | SCM env; | |
0f2d19dd | 995 | { |
6cb702da MD |
996 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, |
997 | xorig, scm_s_expression, "@apply"); | |
0f2d19dd JB |
998 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
999 | } | |
1000 | ||
e2806c10 | 1001 | #define s_atcall_cc (SCM_ISYMCHARS(SCM_IM_CONT)+1) |
0f2d19dd | 1002 | |
1cc91f1b | 1003 | |
0f2d19dd JB |
1004 | SCM |
1005 | scm_m_cont (xorig, env) | |
1006 | SCM xorig; | |
1007 | SCM env; | |
0f2d19dd | 1008 | { |
6cb702da MD |
1009 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
1010 | xorig, scm_s_expression, "@call-with-current-continuation"); | |
0f2d19dd JB |
1011 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
1012 | } | |
1013 | ||
6dbd0af5 MD |
1014 | /* scm_unmemocopy takes a memoized expression together with its |
1015 | * environment and rewrites it to its original form. Thus, it is the | |
1016 | * inversion of the rewrite rules above. The procedure is not | |
1017 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1018 | * code of a closure, in scm_procedure_source, in display_frame when |
1019 | * generating the source for a stackframe in a backtrace, and in | |
1020 | * display_expression. | |
6dbd0af5 MD |
1021 | */ |
1022 | ||
1cc91f1b JB |
1023 | static SCM unmemocopy SCM_P ((SCM x, SCM env)); |
1024 | ||
6dbd0af5 MD |
1025 | static SCM |
1026 | unmemocopy (x, env) | |
1027 | SCM x; | |
1028 | SCM env; | |
6dbd0af5 MD |
1029 | { |
1030 | SCM ls, z; | |
1031 | #ifdef DEBUG_EXTENSIONS | |
1032 | SCM p; | |
1033 | #endif | |
1034 | if (SCM_NCELLP (x) || SCM_NECONSP (x)) | |
1035 | return x; | |
1036 | #ifdef DEBUG_EXTENSIONS | |
1037 | p = scm_whash_lookup (scm_source_whash, x); | |
1038 | #endif | |
1039 | switch (SCM_TYP7 (x)) | |
1040 | { | |
1041 | case (127 & SCM_IM_AND): | |
1042 | ls = z = scm_cons (scm_i_and, SCM_UNSPECIFIED); | |
1043 | break; | |
1044 | case (127 & SCM_IM_BEGIN): | |
1045 | ls = z = scm_cons (scm_i_begin, SCM_UNSPECIFIED); | |
1046 | break; | |
1047 | case (127 & SCM_IM_CASE): | |
1048 | ls = z = scm_cons (scm_i_case, SCM_UNSPECIFIED); | |
1049 | break; | |
1050 | case (127 & SCM_IM_COND): | |
1051 | ls = z = scm_cons (scm_i_cond, SCM_UNSPECIFIED); | |
1052 | break; | |
1053 | case (127 & SCM_IM_DO): | |
1054 | ls = scm_cons (scm_i_do, SCM_UNSPECIFIED); | |
1055 | goto transform; | |
1056 | case (127 & SCM_IM_IF): | |
1057 | ls = z = scm_cons (scm_i_if, SCM_UNSPECIFIED); | |
1058 | break; | |
1059 | case (127 & SCM_IM_LET): | |
1060 | ls = scm_cons (scm_i_let, SCM_UNSPECIFIED); | |
1061 | goto transform; | |
1062 | case (127 & SCM_IM_LETREC): | |
1063 | { | |
1064 | SCM f, v, e, s; | |
1065 | ls = scm_cons (scm_i_letrec, SCM_UNSPECIFIED); | |
1066 | transform: | |
1067 | x = SCM_CDR (x); | |
1068 | f = v = SCM_CAR (x); | |
1069 | x = SCM_CDR (x); | |
e2806c10 | 1070 | z = EXTEND_ENV (f, SCM_EOL, env); |
6dbd0af5 MD |
1071 | e = scm_reverse (unmemocopy (SCM_CAR (x), |
1072 | SCM_CAR (ls) == scm_i_letrec ? z : env)); | |
1073 | env = z; | |
1074 | s = SCM_CAR (ls) == scm_i_do | |
1075 | ? scm_reverse (unmemocopy (SCM_CDR (SCM_CDR (SCM_CDR (x))), env)) | |
1076 | : f; | |
1077 | z = SCM_EOL; | |
1078 | do | |
1079 | { | |
1080 | z = scm_acons (SCM_CAR (v), | |
1081 | scm_cons (SCM_CAR (e), | |
1082 | SCM_CAR (s) == SCM_CAR (v) | |
1083 | ? SCM_EOL | |
1084 | : scm_cons (SCM_CAR (s), SCM_EOL)), | |
1085 | z); | |
1086 | v = SCM_CDR (v); | |
1087 | e = SCM_CDR (e); | |
1088 | s = SCM_CDR (s); | |
1089 | } | |
1090 | while SCM_NIMP (v); | |
a23afe53 MD |
1091 | z = scm_cons (z, SCM_UNSPECIFIED); |
1092 | SCM_SETCDR (ls, z); | |
6dbd0af5 MD |
1093 | if (SCM_CAR (ls) == scm_i_do) |
1094 | { | |
1095 | x = SCM_CDR (x); | |
a23afe53 | 1096 | SCM_SETCDR (z, scm_cons (unmemocopy (SCM_CAR (x), env), |
6dbd0af5 | 1097 | SCM_UNSPECIFIED)); |
a23afe53 MD |
1098 | z = SCM_CDR (z); |
1099 | x = (SCM) (SCM_CARLOC (SCM_CDR (x)) - 1); | |
6dbd0af5 MD |
1100 | } |
1101 | break; | |
1102 | } | |
1103 | case (127 & SCM_IM_LETSTAR): | |
1104 | { | |
1105 | SCM b, y; | |
1106 | x = SCM_CDR (x); | |
1107 | b = SCM_CAR (x); | |
1108 | y = SCM_EOL; | |
1109 | if SCM_IMP (b) | |
1110 | { | |
e2806c10 | 1111 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1112 | goto letstar; |
1113 | } | |
1114 | y = z = scm_acons (SCM_CAR (b), | |
1115 | unmemocar ( | |
1116 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), | |
1117 | SCM_UNSPECIFIED); | |
e2806c10 | 1118 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1119 | b = SCM_CDR (SCM_CDR (b)); |
1120 | if (SCM_IMP (b)) | |
1121 | { | |
1122 | SCM_SETCDR (y, SCM_EOL); | |
1123 | ls = scm_cons (scm_i_let, z = scm_cons (y, SCM_UNSPECIFIED)); | |
1124 | break; | |
1125 | } | |
1126 | do | |
1127 | { | |
a23afe53 MD |
1128 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1129 | unmemocar ( | |
6dbd0af5 | 1130 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), |
a23afe53 MD |
1131 | SCM_UNSPECIFIED)); |
1132 | z = SCM_CDR (z); | |
e2806c10 | 1133 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1134 | b = SCM_CDR (SCM_CDR (b)); |
1135 | } | |
1136 | while SCM_NIMP (b); | |
a23afe53 | 1137 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 MD |
1138 | letstar: |
1139 | ls = scm_cons (scm_i_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); | |
1140 | break; | |
1141 | } | |
1142 | case (127 & SCM_IM_OR): | |
1143 | ls = z = scm_cons (scm_i_or, SCM_UNSPECIFIED); | |
1144 | break; | |
1145 | case (127 & SCM_IM_LAMBDA): | |
1146 | x = SCM_CDR (x); | |
1147 | ls = scm_cons (scm_i_lambda, | |
1148 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED)); | |
e2806c10 | 1149 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 MD |
1150 | break; |
1151 | case (127 & SCM_IM_QUOTE): | |
1152 | ls = z = scm_cons (scm_i_quote, SCM_UNSPECIFIED); | |
1153 | break; | |
1154 | case (127 & SCM_IM_SET): | |
1155 | ls = z = scm_cons (scm_i_set, SCM_UNSPECIFIED); | |
1156 | break; | |
1157 | case (127 & SCM_IM_DEFINE): | |
1158 | { | |
1159 | SCM n; | |
1160 | x = SCM_CDR (x); | |
1161 | ls = scm_cons (scm_i_define, | |
1162 | z = scm_cons (n = SCM_CAR (x), SCM_UNSPECIFIED)); | |
1163 | if (SCM_NNULLP (env)) | |
a23afe53 | 1164 | SCM_SETCAR (SCM_CAR (env), scm_cons (n, SCM_CAR (SCM_CAR (env)))); |
6dbd0af5 MD |
1165 | break; |
1166 | } | |
1167 | case (127 & SCM_MAKISYM (0)): | |
1168 | z = SCM_CAR (x); | |
1169 | if (!SCM_ISYMP (z)) | |
1170 | goto unmemo; | |
1171 | switch SCM_ISYMNUM (z) | |
1172 | { | |
1173 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
1174 | ls = z = scm_cons (scm_i_atapply, SCM_UNSPECIFIED); | |
1175 | goto loop; | |
1176 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
1177 | ls = z = scm_cons (scm_i_atcall_cc, SCM_UNSPECIFIED); | |
1178 | goto loop; | |
1179 | default: | |
fa888178 | 1180 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1181 | } |
1182 | unmemo: | |
1183 | default: | |
1184 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1185 | SCM_UNSPECIFIED), | |
1186 | env); | |
1187 | } | |
1188 | loop: | |
1189 | while (SCM_CELLP (x = SCM_CDR (x)) && SCM_ECONSP (x)) | |
a23afe53 MD |
1190 | { |
1191 | SCM_SETCDR (z, unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1192 | SCM_UNSPECIFIED), | |
1193 | env)); | |
1194 | z = SCM_CDR (z); | |
1195 | } | |
1196 | SCM_SETCDR (z, x); | |
6dbd0af5 MD |
1197 | #ifdef DEBUG_EXTENSIONS |
1198 | if (SCM_NFALSEP (p)) | |
1199 | scm_whash_insert (scm_source_whash, ls, p); | |
1200 | #endif | |
1201 | return ls; | |
1202 | } | |
1203 | ||
1cc91f1b | 1204 | |
6dbd0af5 MD |
1205 | SCM |
1206 | scm_unmemocopy (x, env) | |
1207 | SCM x; | |
1208 | SCM env; | |
6dbd0af5 MD |
1209 | { |
1210 | if (SCM_NNULLP (env)) | |
1211 | /* Make a copy of the lowest frame to protect it from | |
1212 | modifications by SCM_IM_DEFINE */ | |
1213 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1214 | else | |
1215 | return unmemocopy (x, env); | |
1216 | } | |
1217 | ||
cf7c17e9 | 1218 | #ifndef SCM_RECKLESS |
1cc91f1b | 1219 | |
0f2d19dd JB |
1220 | int |
1221 | scm_badargsp (formals, args) | |
1222 | SCM formals; | |
1223 | SCM args; | |
0f2d19dd JB |
1224 | { |
1225 | while SCM_NIMP | |
1226 | (formals) | |
1227 | { | |
1228 | if SCM_NCONSP | |
1229 | (formals) return 0; | |
1230 | if SCM_IMP | |
1231 | (args) return 1; | |
1232 | formals = SCM_CDR (formals); | |
1233 | args = SCM_CDR (args); | |
1234 | } | |
1235 | return SCM_NNULLP (args) ? 1 : 0; | |
1236 | } | |
1237 | #endif | |
1238 | ||
1239 | ||
1240 | \f | |
6dbd0af5 | 1241 | SCM |
680ed4a8 | 1242 | scm_eval_args (l, env, proc) |
6dbd0af5 MD |
1243 | SCM l; |
1244 | SCM env; | |
680ed4a8 | 1245 | SCM proc; |
6dbd0af5 | 1246 | { |
680ed4a8 | 1247 | SCM results = SCM_EOL, *lloc = &results, res; |
6dbd0af5 MD |
1248 | while (SCM_NIMP (l)) |
1249 | { | |
cf7c17e9 | 1250 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1251 | if (SCM_IMP (l)) |
1252 | goto wrongnumargs; | |
1253 | else if (SCM_CONSP (l)) | |
1254 | { | |
1255 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1256 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1257 | else |
1258 | res = EVALCELLCAR (l, env); | |
1259 | } | |
1260 | else if (SCM_TYP3 (l) == 1) | |
1261 | { | |
1262 | if ((res = SCM_GLOC_VAL (SCM_CAR (l))) == 0) | |
1263 | res = SCM_CAR (l); /* struct planted in code */ | |
1264 | } | |
1265 | else | |
1266 | goto wrongnumargs; | |
1267 | #else | |
1268 | res = EVALCAR (l, env); | |
1269 | #endif | |
1270 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1271 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1272 | l = SCM_CDR (l); |
1273 | } | |
cf7c17e9 | 1274 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1275 | if (SCM_NNULLP (l)) |
1276 | { | |
1277 | wrongnumargs: | |
1278 | scm_wrong_num_args (proc); | |
1279 | } | |
1280 | #endif | |
1281 | return results; | |
6dbd0af5 | 1282 | } |
c4ac4d88 JB |
1283 | |
1284 | ||
0f2d19dd JB |
1285 | #endif /* !DEVAL */ |
1286 | ||
6dbd0af5 MD |
1287 | |
1288 | /* SECTION: This code is specific for the debugging support. One | |
1289 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1290 | * defined. | |
1291 | */ | |
1292 | ||
1293 | #ifndef DEVAL | |
1294 | ||
1295 | #define SCM_APPLY scm_apply | |
1296 | #define PREP_APPLY(proc, args) | |
1297 | #define ENTER_APPLY | |
1298 | #define RETURN(x) return x; | |
b7ff98dd MD |
1299 | #ifdef STACK_CHECKING |
1300 | #ifndef NO_CEVAL_STACK_CHECKING | |
1301 | #define EVAL_STACK_CHECKING | |
1302 | #endif | |
6dbd0af5 MD |
1303 | #endif |
1304 | ||
1305 | #else /* !DEVAL */ | |
1306 | ||
0f2d19dd JB |
1307 | #undef SCM_CEVAL |
1308 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1309 | #undef SCM_APPLY | |
1310 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1311 | #undef PREP_APPLY |
1312 | #define PREP_APPLY(p, l) \ | |
1313 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1314 | #undef ENTER_APPLY | |
1315 | #define ENTER_APPLY \ | |
1316 | {\ | |
b7ff98dd | 1317 | SCM_SET_ARGSREADY (debug);\ |
b6d75948 | 1318 | if (CHECK_APPLY && SCM_TRAPS_P)\ |
b7ff98dd | 1319 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1320 | {\ |
b7ff98dd | 1321 | SCM tmp, tail = SCM_TRACED_FRAME_P (debug) ? SCM_BOOL_T : SCM_BOOL_F;\ |
c6a4fbce | 1322 | SCM_SET_TRACED_FRAME (debug); \ |
b7ff98dd | 1323 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1324 | {\ |
c0ab1b8d | 1325 | tmp = scm_make_debugobj (&debug);\ |
6dbd0af5 | 1326 | scm_ithrow (scm_i_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
b6d75948 | 1327 | }\ |
6dbd0af5 MD |
1328 | else\ |
1329 | {\ | |
1330 | scm_make_cont (&tmp);\ | |
ca6ef71a | 1331 | if (!setjmp (SCM_JMPBUF (tmp)))\ |
6dbd0af5 MD |
1332 | scm_ithrow (scm_i_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
1333 | }\ | |
1334 | }\ | |
1335 | } | |
0f2d19dd JB |
1336 | #undef RETURN |
1337 | #define RETURN(e) {proc = (e); goto exit;} | |
b7ff98dd MD |
1338 | #ifdef STACK_CHECKING |
1339 | #ifndef EVAL_STACK_CHECKING | |
1340 | #define EVAL_STACK_CHECKING | |
1341 | #endif | |
6dbd0af5 MD |
1342 | #endif |
1343 | ||
1344 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1345 | * *fixme*: Although efficiency is important here, this state variable | |
1346 | * should probably not be a global. It should be related to the | |
1347 | * current repl. | |
1348 | */ | |
1349 | ||
1cc91f1b JB |
1350 | |
1351 | SCM (*scm_ceval_ptr) SCM_P ((SCM x, SCM env)); | |
0f2d19dd | 1352 | |
1646d37b | 1353 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1354 | * information stack frame. It is accessed very often from the |
1355 | * debugging evaluator, so it should probably not be indirectly | |
1356 | * addressed. Better to save and restore it from the current root at | |
1357 | * any stack swaps. | |
1358 | */ | |
1359 | ||
1646d37b MD |
1360 | #ifndef USE_THREADS |
1361 | scm_debug_frame *scm_last_debug_frame; | |
1362 | #endif | |
6dbd0af5 MD |
1363 | |
1364 | /* scm_debug_eframe_size is the number of slots available for pseudo | |
1365 | * stack frames at each real stack frame. | |
1366 | */ | |
1367 | ||
1368 | int scm_debug_eframe_size; | |
1369 | ||
b7ff98dd | 1370 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 1371 | |
a74145b8 MD |
1372 | int scm_eval_stack; |
1373 | ||
33b97402 | 1374 | scm_option scm_eval_opts[] = { |
a74145b8 | 1375 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
1376 | }; |
1377 | ||
6dbd0af5 | 1378 | scm_option scm_debug_opts[] = { |
b7ff98dd MD |
1379 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1380 | "*Flyweight representation of the stack at traps." }, | |
1381 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1382 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1383 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1384 | "Record procedure names at definition." }, | |
1385 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1386 | "Display backtrace in anti-chronological order." }, | |
4e646a03 MD |
1387 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1388 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1389 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1390 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1391 | "Maximal number of stored backtrace frames." }, | |
1392 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1393 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1394 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
a74145b8 | 1395 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." } |
6dbd0af5 MD |
1396 | }; |
1397 | ||
1398 | scm_option scm_evaluator_trap_table[] = { | |
b6d75948 | 1399 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
1400 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1401 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
1402 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." } | |
6dbd0af5 MD |
1403 | }; |
1404 | ||
33b97402 MD |
1405 | SCM_PROC (s_eval_options_interface, "eval-options-interface", 0, 1, 0, scm_eval_options_interface); |
1406 | ||
1407 | SCM | |
8ecf1f13 | 1408 | scm_eval_options_interface (SCM setting) |
33b97402 MD |
1409 | { |
1410 | SCM ans; | |
1411 | SCM_DEFER_INTS; | |
1412 | ans = scm_options (setting, | |
1413 | scm_eval_opts, | |
1414 | SCM_N_EVAL_OPTIONS, | |
1415 | s_eval_options_interface); | |
a74145b8 | 1416 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
1417 | SCM_ALLOW_INTS; |
1418 | return ans; | |
1419 | } | |
1420 | ||
1421 | SCM_PROC (s_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, scm_evaluator_traps); | |
1422 | ||
1423 | SCM | |
1424 | scm_evaluator_traps (setting) | |
1425 | SCM setting; | |
1426 | { | |
1427 | SCM ans; | |
1428 | SCM_DEFER_INTS; | |
1429 | ans = scm_options (setting, | |
1430 | scm_evaluator_trap_table, | |
1431 | SCM_N_EVALUATOR_TRAPS, | |
1432 | s_evaluator_traps); | |
1433 | SCM_RESET_DEBUG_MODE; | |
1434 | SCM_ALLOW_INTS | |
1435 | return ans; | |
1436 | } | |
1437 | ||
6dbd0af5 | 1438 | SCM |
680ed4a8 MD |
1439 | scm_deval_args (l, env, proc, lloc) |
1440 | SCM l, env, proc, *lloc; | |
0f2d19dd | 1441 | { |
680ed4a8 | 1442 | SCM *results = lloc, res; |
0f2d19dd JB |
1443 | while (SCM_NIMP (l)) |
1444 | { | |
cf7c17e9 | 1445 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1446 | if (SCM_IMP (l)) |
1447 | goto wrongnumargs; | |
1448 | else if (SCM_CONSP (l)) | |
1449 | { | |
1450 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1451 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1452 | else |
1453 | res = EVALCELLCAR (l, env); | |
1454 | } | |
1455 | else if (SCM_TYP3 (l) == 1) | |
1456 | { | |
1457 | if ((res = SCM_GLOC_VAL (SCM_CAR (l))) == 0) | |
1458 | res = SCM_CAR (l); /* struct planted in code */ | |
1459 | } | |
1460 | else | |
1461 | goto wrongnumargs; | |
1462 | #else | |
1463 | res = EVALCAR (l, env); | |
1464 | #endif | |
1465 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1466 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1467 | l = SCM_CDR (l); |
1468 | } | |
cf7c17e9 | 1469 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1470 | if (SCM_NNULLP (l)) |
1471 | { | |
1472 | wrongnumargs: | |
1473 | scm_wrong_num_args (proc); | |
1474 | } | |
1475 | #endif | |
1476 | return *results; | |
0f2d19dd JB |
1477 | } |
1478 | ||
6dbd0af5 MD |
1479 | #endif /* !DEVAL */ |
1480 | ||
1481 | ||
1482 | /* SECTION: Some local definitions for the evaluator. | |
1483 | */ | |
1484 | ||
1485 | #ifndef DEVAL | |
1486 | #ifdef SCM_FLOATS | |
1487 | #define CHECK_EQVISH(A,B) (((A) == (B)) || (SCM_NFALSEP (scm_eqv_p ((A), (B))))) | |
1488 | #else | |
1489 | #define CHECK_EQVISH(A,B) ((A) == (B)) | |
1490 | #endif | |
1491 | #endif /* DEVAL */ | |
1492 | ||
399dedcc | 1493 | #define BUILTIN_RPASUBR /* Handle rpsubrs and asubrs without calling apply */ |
6dbd0af5 MD |
1494 | |
1495 | /* SECTION: This is the evaluator. Like any real monster, it has | |
1496 | * three heads. This code is compiled twice. | |
1497 | */ | |
1498 | ||
0f2d19dd | 1499 | #if 0 |
1cc91f1b | 1500 | |
0f2d19dd JB |
1501 | SCM |
1502 | scm_ceval (x, env) | |
1503 | SCM x; | |
1504 | SCM env; | |
0f2d19dd JB |
1505 | {} |
1506 | #endif | |
1507 | #if 0 | |
1cc91f1b | 1508 | |
0f2d19dd JB |
1509 | SCM |
1510 | scm_deval (x, env) | |
1511 | SCM x; | |
1512 | SCM env; | |
0f2d19dd JB |
1513 | {} |
1514 | #endif | |
1515 | ||
6dbd0af5 | 1516 | SCM |
0f2d19dd JB |
1517 | SCM_CEVAL (x, env) |
1518 | SCM x; | |
1519 | SCM env; | |
1520 | { | |
1521 | union | |
1522 | { | |
1523 | SCM *lloc; | |
1524 | SCM arg1; | |
f8769b1d | 1525 | } t; |
6dbd0af5 MD |
1526 | SCM proc, arg2; |
1527 | #ifdef DEVAL | |
c0ab1b8d JB |
1528 | scm_debug_frame debug; |
1529 | scm_debug_info *debug_info_end; | |
1646d37b | 1530 | debug.prev = scm_last_debug_frame; |
6dbd0af5 | 1531 | debug.status = scm_debug_eframe_size; |
c0ab1b8d JB |
1532 | debug.vect = (scm_debug_info *) alloca (scm_debug_eframe_size |
1533 | * sizeof (debug.vect[0])); | |
1534 | debug.info = debug.vect; | |
1535 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1536 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1537 | #endif |
b7ff98dd MD |
1538 | #ifdef EVAL_STACK_CHECKING |
1539 | if (SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc) | |
1540 | && scm_stack_checking_enabled_p) | |
6dbd0af5 | 1541 | { |
b7ff98dd | 1542 | #ifdef DEVAL |
6dbd0af5 MD |
1543 | debug.info->e.exp = x; |
1544 | debug.info->e.env = env; | |
b7ff98dd | 1545 | #endif |
6dbd0af5 MD |
1546 | scm_report_stack_overflow (); |
1547 | } | |
1548 | #endif | |
1549 | #ifdef DEVAL | |
1550 | goto start; | |
1551 | #endif | |
1552 | loopnoap: | |
1553 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1554 | loop: | |
1555 | #ifdef DEVAL | |
b7ff98dd MD |
1556 | SCM_CLEAR_ARGSREADY (debug); |
1557 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1558 | --debug.info; |
c0ab1b8d | 1559 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1560 | { |
b7ff98dd | 1561 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1562 | debug.info -= 2; |
1563 | } | |
1564 | start: | |
1565 | debug.info->e.exp = x; | |
1566 | debug.info->e.env = env; | |
b6d75948 | 1567 | if (CHECK_ENTRY && SCM_TRAPS_P) |
b7ff98dd | 1568 | if (SCM_ENTER_FRAME_P || (SCM_BREAKPOINTS_P && SRCBRKP (x))) |
6dbd0af5 | 1569 | { |
b7ff98dd MD |
1570 | SCM tail = SCM_TAILRECP (debug) ? SCM_BOOL_T : SCM_BOOL_F; |
1571 | SCM_SET_TAILREC (debug); | |
b7ff98dd | 1572 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 1573 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
1574 | else |
1575 | { | |
1576 | scm_make_cont (&t.arg1); | |
ca6ef71a | 1577 | if (setjmp (SCM_JMPBUF (t.arg1))) |
6dbd0af5 MD |
1578 | { |
1579 | x = SCM_THROW_VALUE (t.arg1); | |
1580 | if (SCM_IMP (x)) | |
1581 | { | |
1582 | RETURN (x); | |
1583 | } | |
1584 | else | |
1585 | /* This gives the possibility for the debugger to | |
1586 | modify the source expression before evaluation. */ | |
1587 | goto dispatch; | |
1588 | } | |
1589 | } | |
1590 | scm_ithrow (scm_i_enter_frame, | |
1591 | scm_cons2 (t.arg1, tail, | |
1592 | scm_cons (scm_unmemocopy (x, env), SCM_EOL)), | |
1593 | 0); | |
1594 | } | |
6dbd0af5 | 1595 | #endif |
e3173f93 | 1596 | #if defined (USE_THREADS) || defined (DEVAL) |
f8769b1d | 1597 | dispatch: |
e3173f93 | 1598 | #endif |
9cb5124f | 1599 | SCM_TICK; |
0f2d19dd JB |
1600 | switch (SCM_TYP7 (x)) |
1601 | { | |
1602 | case scm_tcs_symbols: | |
1603 | /* Only happens when called at top level. | |
1604 | */ | |
1605 | x = scm_cons (x, SCM_UNDEFINED); | |
1606 | goto retval; | |
1607 | ||
1608 | case (127 & SCM_IM_AND): | |
1609 | x = SCM_CDR (x); | |
1610 | t.arg1 = x; | |
1611 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1612 | if (SCM_FALSEP (EVALCAR (x, env))) | |
1613 | { | |
1614 | RETURN (SCM_BOOL_F); | |
1615 | } | |
1616 | else | |
1617 | x = t.arg1; | |
6dbd0af5 | 1618 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1619 | goto carloop; |
1620 | ||
1621 | case (127 & SCM_IM_BEGIN): | |
6dbd0af5 MD |
1622 | cdrxnoap: |
1623 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
0f2d19dd JB |
1624 | cdrxbegin: |
1625 | x = SCM_CDR (x); | |
1626 | ||
1627 | begin: | |
1628 | t.arg1 = x; | |
1629 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1630 | { | |
1631 | SIDEVAL (SCM_CAR (x), env); | |
1632 | x = t.arg1; | |
1633 | } | |
1634 | ||
1635 | carloop: /* scm_eval car of last form in list */ | |
1636 | if (SCM_NCELLP (SCM_CAR (x))) | |
1637 | { | |
1638 | x = SCM_CAR (x); | |
6cb702da | 1639 | RETURN (SCM_IMP (x) ? SCM_EVALIM (x, env) : SCM_GLOC_VAL (x)) |
0f2d19dd JB |
1640 | } |
1641 | ||
1642 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
1643 | { | |
1644 | retval: | |
6dbd0af5 | 1645 | RETURN (*scm_lookupcar (x, env)) |
0f2d19dd JB |
1646 | } |
1647 | ||
1648 | x = SCM_CAR (x); | |
1649 | goto loop; /* tail recurse */ | |
1650 | ||
1651 | ||
1652 | case (127 & SCM_IM_CASE): | |
1653 | x = SCM_CDR (x); | |
1654 | t.arg1 = EVALCAR (x, env); | |
1655 | while (SCM_NIMP (x = SCM_CDR (x))) | |
1656 | { | |
1657 | proc = SCM_CAR (x); | |
1658 | if (scm_i_else == SCM_CAR (proc)) | |
1659 | { | |
1660 | x = SCM_CDR (proc); | |
6dbd0af5 | 1661 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1662 | goto begin; |
1663 | } | |
1664 | proc = SCM_CAR (proc); | |
1665 | while (SCM_NIMP (proc)) | |
1666 | { | |
1667 | if (CHECK_EQVISH (SCM_CAR (proc), t.arg1)) | |
1668 | { | |
1669 | x = SCM_CDR (SCM_CAR (x)); | |
6dbd0af5 | 1670 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1671 | goto begin; |
1672 | } | |
1673 | proc = SCM_CDR (proc); | |
1674 | } | |
1675 | } | |
6dbd0af5 | 1676 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
1677 | |
1678 | ||
1679 | case (127 & SCM_IM_COND): | |
1680 | while (SCM_NIMP (x = SCM_CDR (x))) | |
1681 | { | |
1682 | proc = SCM_CAR (x); | |
1683 | t.arg1 = EVALCAR (proc, env); | |
1684 | if (SCM_NFALSEP (t.arg1)) | |
1685 | { | |
1686 | x = SCM_CDR (proc); | |
6dbd0af5 | 1687 | if SCM_NULLP (x) |
0f2d19dd | 1688 | { |
6dbd0af5 | 1689 | RETURN (t.arg1) |
0f2d19dd JB |
1690 | } |
1691 | if (scm_i_arrow != SCM_CAR (x)) | |
6dbd0af5 MD |
1692 | { |
1693 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1694 | goto begin; | |
1695 | } | |
0f2d19dd JB |
1696 | proc = SCM_CDR (x); |
1697 | proc = EVALCAR (proc, env); | |
1698 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
1699 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
1700 | ENTER_APPLY; | |
0f2d19dd JB |
1701 | goto evap1; |
1702 | } | |
1703 | } | |
6dbd0af5 | 1704 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
1705 | |
1706 | ||
1707 | case (127 & SCM_IM_DO): | |
1708 | x = SCM_CDR (x); | |
1709 | proc = SCM_CAR (SCM_CDR (x)); /* inits */ | |
1710 | t.arg1 = SCM_EOL; /* values */ | |
1711 | while (SCM_NIMP (proc)) | |
1712 | { | |
1713 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
1714 | proc = SCM_CDR (proc); | |
1715 | } | |
e2806c10 | 1716 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd JB |
1717 | x = SCM_CDR (SCM_CDR (x)); |
1718 | while (proc = SCM_CAR (x), SCM_FALSEP (EVALCAR (proc, env))) | |
1719 | { | |
1720 | for (proc = SCM_CAR (SCM_CDR (x)); SCM_NIMP (proc); proc = SCM_CDR (proc)) | |
1721 | { | |
1722 | t.arg1 = SCM_CAR (proc); /* body */ | |
1723 | SIDEVAL (t.arg1, env); | |
1724 | } | |
1725 | for (t.arg1 = SCM_EOL, proc = SCM_CDR (SCM_CDR (x)); SCM_NIMP (proc); proc = SCM_CDR (proc)) | |
1726 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); /* steps */ | |
e2806c10 | 1727 | env = EXTEND_ENV (SCM_CAR (SCM_CAR (env)), t.arg1, SCM_CDR (env)); |
0f2d19dd JB |
1728 | } |
1729 | x = SCM_CDR (proc); | |
1730 | if (SCM_NULLP (x)) | |
6dbd0af5 MD |
1731 | RETURN (SCM_UNSPECIFIED); |
1732 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
0f2d19dd JB |
1733 | goto begin; |
1734 | ||
1735 | ||
1736 | case (127 & SCM_IM_IF): | |
1737 | x = SCM_CDR (x); | |
1738 | if (SCM_NFALSEP (EVALCAR (x, env))) | |
1739 | x = SCM_CDR (x); | |
1740 | else if (SCM_IMP (x = SCM_CDR (SCM_CDR (x)))) | |
1741 | { | |
1742 | RETURN (SCM_UNSPECIFIED); | |
1743 | } | |
6dbd0af5 | 1744 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1745 | goto carloop; |
1746 | ||
1747 | ||
1748 | case (127 & SCM_IM_LET): | |
1749 | x = SCM_CDR (x); | |
1750 | proc = SCM_CAR (SCM_CDR (x)); | |
1751 | t.arg1 = SCM_EOL; | |
1752 | do | |
1753 | { | |
1754 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
1755 | } | |
1756 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
e2806c10 | 1757 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd | 1758 | x = SCM_CDR (x); |
6dbd0af5 | 1759 | goto cdrxnoap; |
0f2d19dd JB |
1760 | |
1761 | ||
1762 | case (127 & SCM_IM_LETREC): | |
1763 | x = SCM_CDR (x); | |
e2806c10 | 1764 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd JB |
1765 | x = SCM_CDR (x); |
1766 | proc = SCM_CAR (x); | |
1767 | t.arg1 = SCM_EOL; | |
1768 | do | |
1769 | { | |
1770 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
1771 | } | |
1772 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
a23afe53 | 1773 | SCM_SETCDR (SCM_CAR (env), t.arg1); |
6dbd0af5 | 1774 | goto cdrxnoap; |
0f2d19dd JB |
1775 | |
1776 | ||
1777 | case (127 & SCM_IM_LETSTAR): | |
1778 | x = SCM_CDR (x); | |
1779 | proc = SCM_CAR (x); | |
1780 | if (SCM_IMP (proc)) | |
1781 | { | |
e2806c10 | 1782 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 | 1783 | goto cdrxnoap; |
0f2d19dd JB |
1784 | } |
1785 | do | |
1786 | { | |
1787 | t.arg1 = SCM_CAR (proc); | |
1788 | proc = SCM_CDR (proc); | |
e2806c10 | 1789 | env = EXTEND_ENV (t.arg1, EVALCAR (proc, env), env); |
0f2d19dd JB |
1790 | } |
1791 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
6dbd0af5 | 1792 | goto cdrxnoap; |
0f2d19dd JB |
1793 | |
1794 | case (127 & SCM_IM_OR): | |
1795 | x = SCM_CDR (x); | |
1796 | t.arg1 = x; | |
1797 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1798 | { | |
1799 | x = EVALCAR (x, env); | |
1800 | if (SCM_NFALSEP (x)) | |
1801 | { | |
1802 | RETURN (x); | |
1803 | } | |
1804 | x = t.arg1; | |
1805 | } | |
6dbd0af5 | 1806 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1807 | goto carloop; |
1808 | ||
1809 | ||
1810 | case (127 & SCM_IM_LAMBDA): | |
1811 | RETURN (scm_closure (SCM_CDR (x), env)); | |
1812 | ||
1813 | ||
1814 | case (127 & SCM_IM_QUOTE): | |
1815 | RETURN (SCM_CAR (SCM_CDR (x))); | |
1816 | ||
1817 | ||
1818 | case (127 & SCM_IM_SET): | |
0f2d19dd JB |
1819 | x = SCM_CDR (x); |
1820 | proc = SCM_CAR (x); | |
6dbd0af5 | 1821 | switch (7 & (int) proc) |
0f2d19dd JB |
1822 | { |
1823 | case 0: | |
1824 | t.lloc = scm_lookupcar (x, env); | |
1825 | break; | |
1826 | case 1: | |
a23afe53 | 1827 | t.lloc = SCM_GLOC_VAL_LOC (proc); |
0f2d19dd JB |
1828 | break; |
1829 | #ifdef MEMOIZE_LOCALS | |
1830 | case 4: | |
1831 | t.lloc = scm_ilookup (proc, env); | |
1832 | break; | |
1833 | #endif | |
1834 | } | |
1835 | x = SCM_CDR (x); | |
1836 | *t.lloc = EVALCAR (x, env); | |
0f2d19dd JB |
1837 | #ifdef SICP |
1838 | RETURN (*t.lloc); | |
1839 | #else | |
1840 | RETURN (SCM_UNSPECIFIED); | |
1841 | #endif | |
1842 | ||
1843 | ||
1844 | case (127 & SCM_IM_DEFINE): /* only for internal defines */ | |
1845 | x = SCM_CDR (x); | |
1846 | proc = SCM_CAR (x); | |
1847 | x = SCM_CDR (x); | |
1848 | x = evalcar (x, env); | |
6dbd0af5 | 1849 | #ifdef DEBUG_EXTENSIONS |
80ea260c MD |
1850 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x)) |
1851 | { | |
1852 | t.arg1 = x; | |
1853 | proc: | |
1854 | if (SCM_CLOSUREP (t.arg1) | |
1855 | /* Only the first definition determines the name. */ | |
1856 | && (scm_procedure_property (t.arg1, scm_i_inner_name) | |
1857 | == SCM_BOOL_F)) | |
1858 | scm_set_procedure_property_x (t.arg1, scm_i_inner_name, proc); | |
1859 | else if (SCM_TYP16 (t.arg1) == scm_tc16_macro | |
1860 | && SCM_CDR (t.arg1) != t.arg1) | |
1861 | { | |
1862 | t.arg1 = SCM_CDR (t.arg1); | |
1863 | goto proc; | |
1864 | } | |
1865 | } | |
6dbd0af5 | 1866 | #endif |
0f2d19dd JB |
1867 | env = SCM_CAR (env); |
1868 | SCM_DEFER_INTS; | |
a23afe53 MD |
1869 | SCM_SETCAR (env, scm_cons (proc, SCM_CAR (env))); |
1870 | SCM_SETCDR (env, scm_cons (x, SCM_CDR (env))); | |
0f2d19dd JB |
1871 | SCM_ALLOW_INTS; |
1872 | RETURN (SCM_UNSPECIFIED); | |
1873 | ||
1874 | ||
0f2d19dd JB |
1875 | /* new syntactic forms go here. */ |
1876 | case (127 & SCM_MAKISYM (0)): | |
1877 | proc = SCM_CAR (x); | |
1878 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
1879 | switch SCM_ISYMNUM (proc) | |
1880 | { | |
1881 | #if 0 | |
1882 | case (SCM_ISYMNUM (IM_VREF)): | |
1883 | { | |
1884 | SCM var; | |
1885 | var = SCM_CAR (SCM_CDR (x)); | |
1886 | RETURN (SCM_CDR(var)); | |
1887 | } | |
1888 | case (SCM_ISYMNUM (IM_VSET)): | |
1889 | SCM_CDR (SCM_CAR ( SCM_CDR (x))) = EVALCAR( SCM_CDR ( SCM_CDR (x)), env); | |
1890 | SCM_CAR (SCM_CAR ( SCM_CDR (x))) = scm_tc16_variable; | |
6dbd0af5 | 1891 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
1892 | #endif |
1893 | ||
1894 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
1895 | proc = SCM_CDR (x); | |
1896 | proc = EVALCAR (proc, env); | |
1897 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
1898 | if (SCM_CLOSUREP (proc)) | |
1899 | { | |
1609038c | 1900 | SCM argl, tl; |
6dbd0af5 | 1901 | PREP_APPLY (proc, SCM_EOL); |
0f2d19dd JB |
1902 | t.arg1 = SCM_CDR (SCM_CDR (x)); |
1903 | t.arg1 = EVALCAR (t.arg1, env); | |
6dbd0af5 MD |
1904 | #ifdef DEVAL |
1905 | debug.info->a.args = t.arg1; | |
1906 | #endif | |
cf7c17e9 | 1907 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
1908 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), t.arg1)) |
1909 | goto wrongnumargs; | |
1910 | #endif | |
1609038c MD |
1911 | /* Copy argument list */ |
1912 | if (SCM_IMP (t.arg1)) | |
1913 | argl = t.arg1; | |
1914 | else | |
1915 | { | |
1916 | argl = tl = scm_cons (SCM_CAR (t.arg1), SCM_UNSPECIFIED); | |
1917 | while (SCM_NIMP (t.arg1 = SCM_CDR (t.arg1)) | |
1918 | && SCM_CONSP (t.arg1)) | |
1919 | { | |
1920 | SCM_SETCDR (tl, scm_cons (SCM_CAR (t.arg1), | |
1921 | SCM_UNSPECIFIED)); | |
1922 | tl = SCM_CDR (tl); | |
1923 | } | |
1924 | SCM_SETCDR (tl, t.arg1); | |
1925 | } | |
1926 | ||
1927 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), argl, SCM_ENV (proc)); | |
0f2d19dd JB |
1928 | x = SCM_CODE (proc); |
1929 | goto cdrxbegin; | |
1930 | } | |
1931 | proc = scm_i_apply; | |
1932 | goto evapply; | |
1933 | ||
1934 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
1935 | scm_make_cont (&t.arg1); | |
ca6ef71a | 1936 | if (setjmp (SCM_JMPBUF (t.arg1))) |
0f2d19dd JB |
1937 | { |
1938 | SCM val; | |
1939 | val = SCM_THROW_VALUE (t.arg1); | |
6dbd0af5 | 1940 | RETURN (val); |
0f2d19dd JB |
1941 | } |
1942 | proc = SCM_CDR (x); | |
1943 | proc = evalcar (proc, env); | |
1944 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
1945 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
1946 | ENTER_APPLY; | |
0f2d19dd JB |
1947 | goto evap1; |
1948 | ||
1949 | default: | |
1950 | goto badfun; | |
1951 | } | |
1952 | ||
1953 | default: | |
1954 | proc = x; | |
1955 | badfun: | |
f5bf2977 | 1956 | /* scm_everr (x, env,...) */ |
523f5266 GH |
1957 | scm_misc_error (NULL, |
1958 | "Wrong type to apply: %S", | |
1959 | scm_listify (proc, SCM_UNDEFINED)); | |
0f2d19dd JB |
1960 | case scm_tc7_vector: |
1961 | case scm_tc7_wvect: | |
1962 | case scm_tc7_bvect: | |
1963 | case scm_tc7_byvect: | |
1964 | case scm_tc7_svect: | |
1965 | case scm_tc7_ivect: | |
1966 | case scm_tc7_uvect: | |
1967 | case scm_tc7_fvect: | |
1968 | case scm_tc7_dvect: | |
1969 | case scm_tc7_cvect: | |
1970 | #ifdef LONGLONGS | |
1971 | case scm_tc7_llvect: | |
1972 | #endif | |
1973 | case scm_tc7_string: | |
0f2d19dd | 1974 | case scm_tc7_substring: |
0f2d19dd JB |
1975 | case scm_tc7_smob: |
1976 | case scm_tcs_closures: | |
224822be MD |
1977 | #ifdef CCLO |
1978 | case scm_tc7_cclo: | |
1979 | #endif | |
0f2d19dd JB |
1980 | case scm_tcs_subrs: |
1981 | RETURN (x); | |
1982 | ||
1983 | #ifdef MEMOIZE_LOCALS | |
1984 | case (127 & SCM_ILOC00): | |
1985 | proc = *scm_ilookup (SCM_CAR (x), env); | |
1986 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
1987 | #ifndef SCM_RECKLESS |
1988 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
1989 | goto checkargs; |
1990 | #endif | |
1991 | #endif | |
1992 | break; | |
1993 | #endif /* ifdef MEMOIZE_LOCALS */ | |
1994 | ||
1995 | ||
1996 | case scm_tcs_cons_gloc: | |
1997 | proc = SCM_GLOC_VAL (SCM_CAR (x)); | |
aa00bd1e MD |
1998 | if (proc == 0) |
1999 | /* This is a struct implanted in the code, not a gloc. */ | |
2000 | RETURN (x); | |
0f2d19dd | 2001 | SCM_ASRTGO (SCM_NIMP (proc), badfun); |
cf7c17e9 JB |
2002 | #ifndef SCM_RECKLESS |
2003 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2004 | goto checkargs; |
2005 | #endif | |
2006 | #endif | |
2007 | break; | |
2008 | ||
2009 | ||
2010 | case scm_tcs_cons_nimcar: | |
2011 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
2012 | { | |
f8769b1d MV |
2013 | #ifdef USE_THREADS |
2014 | t.lloc = scm_lookupcar1 (x, env); | |
2015 | if (t.lloc == NULL) | |
2016 | { | |
2017 | /* we have lost the race, start again. */ | |
2018 | goto dispatch; | |
2019 | } | |
2020 | proc = *t.lloc; | |
2021 | #else | |
0f2d19dd | 2022 | proc = *scm_lookupcar (x, env); |
f8769b1d MV |
2023 | #endif |
2024 | ||
0f2d19dd JB |
2025 | if (SCM_IMP (proc)) |
2026 | { | |
2027 | unmemocar (x, env); | |
2028 | goto badfun; | |
2029 | } | |
2030 | if (scm_tc16_macro == SCM_TYP16 (proc)) | |
2031 | { | |
2032 | unmemocar (x, env); | |
2033 | ||
2034 | handle_a_macro: | |
368bf056 | 2035 | #ifdef DEVAL |
7c354052 MD |
2036 | /* Set a flag during macro expansion so that macro |
2037 | application frames can be deleted from the backtrace. */ | |
2038 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2039 | #endif |
f8769b1d MV |
2040 | t.arg1 = SCM_APPLY (SCM_CDR (proc), x, |
2041 | scm_cons (env, scm_listofnull)); | |
2042 | ||
7c354052 MD |
2043 | #ifdef DEVAL |
2044 | SCM_CLEAR_MACROEXP (debug); | |
2045 | #endif | |
0f2d19dd JB |
2046 | switch ((int) (SCM_CAR (proc) >> 16)) |
2047 | { | |
2048 | case 2: | |
2049 | if (scm_ilength (t.arg1) <= 0) | |
2050 | t.arg1 = scm_cons2 (SCM_IM_BEGIN, t.arg1, SCM_EOL); | |
6dbd0af5 MD |
2051 | #ifdef DEVAL |
2052 | if (!SCM_CLOSUREP (SCM_CDR (proc))) | |
2053 | { | |
f8769b1d | 2054 | |
6dbd0af5 MD |
2055 | #if 0 /* Top-level defines doesn't very often occur in backtraces */ |
2056 | if (scm_m_define == SCM_SUBRF (SCM_CDR (proc)) && SCM_TOP_LEVEL (env)) | |
2057 | /* Prevent memoizing result of define macro */ | |
2058 | { | |
2059 | debug.info->e.exp = scm_cons (SCM_CAR (x), SCM_CDR (x)); | |
2060 | scm_set_source_properties_x (debug.info->e.exp, | |
2061 | scm_source_properties (x)); | |
2062 | } | |
2063 | #endif | |
2064 | SCM_DEFER_INTS; | |
a23afe53 MD |
2065 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2066 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
6dbd0af5 MD |
2067 | SCM_ALLOW_INTS; |
2068 | goto dispatch; | |
2069 | } | |
2070 | /* Prevent memoizing of debug info expression. */ | |
2071 | debug.info->e.exp = scm_cons (SCM_CAR (x), SCM_CDR (x)); | |
2072 | scm_set_source_properties_x (debug.info->e.exp, | |
2073 | scm_source_properties (x)); | |
2074 | #endif | |
0f2d19dd | 2075 | SCM_DEFER_INTS; |
a23afe53 MD |
2076 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2077 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
0f2d19dd | 2078 | SCM_ALLOW_INTS; |
6dbd0af5 | 2079 | goto loopnoap; |
0f2d19dd JB |
2080 | case 1: |
2081 | if (SCM_NIMP (x = t.arg1)) | |
6dbd0af5 | 2082 | goto loopnoap; |
0f2d19dd JB |
2083 | case 0: |
2084 | RETURN (t.arg1); | |
2085 | } | |
2086 | } | |
2087 | } | |
2088 | else | |
2089 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
2090 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2091 | #ifndef SCM_RECKLESS |
2092 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2093 | checkargs: |
2094 | #endif | |
2095 | if (SCM_CLOSUREP (proc)) | |
2096 | { | |
2097 | arg2 = SCM_CAR (SCM_CODE (proc)); | |
2098 | t.arg1 = SCM_CDR (x); | |
2099 | while (SCM_NIMP (arg2)) | |
2100 | { | |
2101 | if (SCM_NCONSP (arg2)) | |
2102 | goto evapply; | |
2103 | if (SCM_IMP (t.arg1)) | |
2104 | goto umwrongnumargs; | |
2105 | arg2 = SCM_CDR (arg2); | |
2106 | t.arg1 = SCM_CDR (t.arg1); | |
2107 | } | |
2108 | if (SCM_NNULLP (t.arg1)) | |
2109 | goto umwrongnumargs; | |
2110 | } | |
2111 | else if (scm_tc16_macro == SCM_TYP16 (proc)) | |
2112 | goto handle_a_macro; | |
2113 | #endif | |
2114 | } | |
2115 | ||
2116 | ||
6dbd0af5 MD |
2117 | evapply: |
2118 | PREP_APPLY (proc, SCM_EOL); | |
2119 | if (SCM_NULLP (SCM_CDR (x))) { | |
2120 | ENTER_APPLY; | |
0f2d19dd JB |
2121 | switch (SCM_TYP7 (proc)) |
2122 | { /* no arguments given */ | |
2123 | case scm_tc7_subr_0: | |
2124 | RETURN (SCM_SUBRF (proc) ()); | |
2125 | case scm_tc7_subr_1o: | |
2126 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2127 | case scm_tc7_lsubr: | |
2128 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2129 | case scm_tc7_rpsubr: | |
2130 | RETURN (SCM_BOOL_T); | |
2131 | case scm_tc7_asubr: | |
2132 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
6dbd0af5 | 2133 | #ifdef CCLO |
0f2d19dd JB |
2134 | case scm_tc7_cclo: |
2135 | t.arg1 = proc; | |
2136 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2137 | #ifdef DEVAL |
2138 | debug.info->a.proc = proc; | |
2139 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2140 | #endif | |
0f2d19dd | 2141 | goto evap1; |
6dbd0af5 | 2142 | #endif |
0f2d19dd JB |
2143 | case scm_tcs_closures: |
2144 | x = SCM_CODE (proc); | |
e2806c10 | 2145 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, SCM_ENV (proc)); |
0f2d19dd | 2146 | goto cdrxbegin; |
da7f71d7 | 2147 | case scm_tcs_cons_gloc: |
9b07e212 MD |
2148 | if (!SCM_I_OPERATORP (proc)) |
2149 | goto badfun; | |
2150 | else | |
da7f71d7 MD |
2151 | { |
2152 | x = (SCM_I_ENTITYP (proc) | |
2153 | ? SCM_ENTITY_PROC_0 (proc) | |
2154 | : SCM_OPERATOR_PROC_0 (proc)); | |
2155 | if (SCM_NIMP (x)) | |
33b97402 MD |
2156 | { |
2157 | if (SCM_TYP7 (x) == scm_tc7_subr_1) | |
2158 | RETURN (SCM_SUBRF (x) (proc)) | |
2159 | else if (SCM_CLOSUREP (x)) | |
2160 | { | |
2161 | t.arg1 = proc; | |
2162 | proc = x; | |
da7f71d7 | 2163 | #ifdef DEVAL |
33b97402 MD |
2164 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); |
2165 | debug.info->a.proc = proc; | |
da7f71d7 | 2166 | #endif |
33b97402 MD |
2167 | goto clos1; |
2168 | } | |
2169 | } | |
da7f71d7 MD |
2170 | /* Fall through. */ |
2171 | } | |
0f2d19dd JB |
2172 | case scm_tc7_contin: |
2173 | case scm_tc7_subr_1: | |
2174 | case scm_tc7_subr_2: | |
2175 | case scm_tc7_subr_2o: | |
2176 | case scm_tc7_cxr: | |
2177 | case scm_tc7_subr_3: | |
2178 | case scm_tc7_lsubr_2: | |
2179 | umwrongnumargs: | |
2180 | unmemocar (x, env); | |
2181 | wrongnumargs: | |
f5bf2977 GH |
2182 | /* scm_everr (x, env,...) */ |
2183 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
2184 | default: |
2185 | /* handle macros here */ | |
2186 | goto badfun; | |
2187 | } | |
6dbd0af5 | 2188 | } |
0f2d19dd JB |
2189 | |
2190 | /* must handle macros by here */ | |
2191 | x = SCM_CDR (x); | |
cf7c17e9 | 2192 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2193 | if (SCM_IMP (x)) |
2194 | goto wrongnumargs; | |
680ed4a8 MD |
2195 | else if (SCM_CONSP (x)) |
2196 | { | |
2197 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2198 | t.arg1 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2199 | else |
2200 | t.arg1 = EVALCELLCAR (x, env); | |
2201 | } | |
2202 | else if (SCM_TYP3 (x) == 1) | |
2203 | { | |
2204 | if ((t.arg1 = SCM_GLOC_VAL (SCM_CAR (x))) == 0) | |
2205 | t.arg1 = SCM_CAR (x); /* struct planted in code */ | |
2206 | } | |
2207 | else | |
2208 | goto wrongnumargs; | |
2209 | #else | |
0f2d19dd | 2210 | t.arg1 = EVALCAR (x, env); |
680ed4a8 | 2211 | #endif |
6dbd0af5 MD |
2212 | #ifdef DEVAL |
2213 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2214 | #endif | |
0f2d19dd JB |
2215 | x = SCM_CDR (x); |
2216 | if (SCM_NULLP (x)) | |
2217 | { | |
6dbd0af5 | 2218 | ENTER_APPLY; |
0f2d19dd JB |
2219 | evap1: |
2220 | switch (SCM_TYP7 (proc)) | |
6dbd0af5 | 2221 | { /* have one argument in t.arg1 */ |
0f2d19dd JB |
2222 | case scm_tc7_subr_2o: |
2223 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2224 | case scm_tc7_subr_1: | |
2225 | case scm_tc7_subr_1o: | |
2226 | RETURN (SCM_SUBRF (proc) (t.arg1)); | |
2227 | case scm_tc7_cxr: | |
2228 | #ifdef SCM_FLOATS | |
2229 | if (SCM_SUBRF (proc)) | |
2230 | { | |
2231 | if (SCM_INUMP (t.arg1)) | |
2232 | { | |
2233 | RETURN (scm_makdbl (SCM_DSUBRF (proc) ((double) SCM_INUM (t.arg1)), | |
2234 | 0.0)); | |
2235 | } | |
2236 | SCM_ASRTGO (SCM_NIMP (t.arg1), floerr); | |
2237 | if (SCM_REALP (t.arg1)) | |
2238 | { | |
2239 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (SCM_REALPART (t.arg1)), 0.0)); | |
2240 | } | |
2241 | #ifdef SCM_BIGDIG | |
2242 | if (SCM_BIGP (t.arg1)) | |
2243 | { | |
2244 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (scm_big2dbl (t.arg1)), 0.0)); | |
2245 | } | |
2246 | #endif | |
2247 | floerr: | |
2248 | scm_wta (t.arg1, (char *) SCM_ARG1, SCM_CHARS (SCM_SNAME (proc))); | |
2249 | } | |
2250 | #endif | |
2251 | proc = (SCM) SCM_SNAME (proc); | |
2252 | { | |
2253 | char *chrs = SCM_CHARS (proc) + SCM_LENGTH (proc) - 1; | |
2254 | while ('c' != *--chrs) | |
2255 | { | |
2256 | SCM_ASSERT (SCM_NIMP (t.arg1) && SCM_CONSP (t.arg1), | |
2257 | t.arg1, SCM_ARG1, SCM_CHARS (proc)); | |
2258 | t.arg1 = ('a' == *chrs) ? SCM_CAR (t.arg1) : SCM_CDR (t.arg1); | |
2259 | } | |
2260 | RETURN (t.arg1); | |
2261 | } | |
2262 | case scm_tc7_rpsubr: | |
2263 | RETURN (SCM_BOOL_T); | |
2264 | case scm_tc7_asubr: | |
2265 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2266 | case scm_tc7_lsubr: | |
2267 | #ifdef DEVAL | |
6dbd0af5 | 2268 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
0f2d19dd JB |
2269 | #else |
2270 | RETURN (SCM_SUBRF (proc) (scm_cons (t.arg1, SCM_EOL))); | |
2271 | #endif | |
6dbd0af5 | 2272 | #ifdef CCLO |
0f2d19dd JB |
2273 | case scm_tc7_cclo: |
2274 | arg2 = t.arg1; | |
2275 | t.arg1 = proc; | |
2276 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2277 | #ifdef DEVAL |
2278 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); | |
2279 | debug.info->a.proc = proc; | |
2280 | #endif | |
0f2d19dd | 2281 | goto evap2; |
6dbd0af5 | 2282 | #endif |
0f2d19dd | 2283 | case scm_tcs_closures: |
da7f71d7 | 2284 | clos1: |
0f2d19dd JB |
2285 | x = SCM_CODE (proc); |
2286 | #ifdef DEVAL | |
e2806c10 | 2287 | env = EXTEND_ENV (SCM_CAR (x), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2288 | #else |
e2806c10 | 2289 | env = EXTEND_ENV (SCM_CAR (x), scm_cons (t.arg1, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd JB |
2290 | #endif |
2291 | goto cdrxbegin; | |
65e41721 MD |
2292 | case scm_tc7_contin: |
2293 | scm_call_continuation (proc, t.arg1); | |
0c32d76c | 2294 | case scm_tcs_cons_gloc: |
9b07e212 MD |
2295 | if (!SCM_I_OPERATORP (proc)) |
2296 | goto badfun; | |
2297 | else | |
0c32d76c | 2298 | { |
da7f71d7 MD |
2299 | x = (SCM_I_ENTITYP (proc) |
2300 | ? SCM_ENTITY_PROC_1 (proc) | |
2301 | : SCM_OPERATOR_PROC_1 (proc)); | |
2302 | if (SCM_NIMP (x)) | |
33b97402 MD |
2303 | { |
2304 | if (SCM_TYP7 (x) == scm_tc7_subr_2) | |
2305 | RETURN (SCM_SUBRF (x) (proc, t.arg1)) | |
2306 | else if (SCM_CLOSUREP (x)) | |
2307 | { | |
2308 | arg2 = t.arg1; | |
2309 | t.arg1 = proc; | |
2310 | proc = x; | |
0c32d76c | 2311 | #ifdef DEVAL |
33b97402 MD |
2312 | debug.info->a.args = scm_cons (t.arg1, |
2313 | debug.info->a.args); | |
2314 | debug.info->a.proc = proc; | |
0c32d76c | 2315 | #endif |
33b97402 MD |
2316 | goto clos2; |
2317 | } | |
2318 | } | |
0c32d76c MD |
2319 | /* Fall through. */ |
2320 | } | |
0f2d19dd JB |
2321 | case scm_tc7_subr_2: |
2322 | case scm_tc7_subr_0: | |
2323 | case scm_tc7_subr_3: | |
2324 | case scm_tc7_lsubr_2: | |
2325 | goto wrongnumargs; | |
2326 | default: | |
2327 | goto badfun; | |
2328 | } | |
2329 | } | |
cf7c17e9 | 2330 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2331 | if (SCM_IMP (x)) |
2332 | goto wrongnumargs; | |
680ed4a8 MD |
2333 | else if (SCM_CONSP (x)) |
2334 | { | |
2335 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2336 | arg2 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2337 | else |
2338 | arg2 = EVALCELLCAR (x, env); | |
2339 | } | |
2340 | else if (SCM_TYP3 (x) == 1) | |
2341 | { | |
2342 | if ((arg2 = SCM_GLOC_VAL (SCM_CAR (x))) == 0) | |
2343 | arg2 = SCM_CAR (x); /* struct planted in code */ | |
2344 | } | |
2345 | else | |
2346 | goto wrongnumargs; | |
2347 | #else | |
2348 | arg2 = EVALCAR (x, env); | |
0f2d19dd JB |
2349 | #endif |
2350 | { /* have two or more arguments */ | |
6dbd0af5 MD |
2351 | #ifdef DEVAL |
2352 | debug.info->a.args = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2353 | #endif | |
0f2d19dd JB |
2354 | x = SCM_CDR (x); |
2355 | if (SCM_NULLP (x)) { | |
6dbd0af5 | 2356 | ENTER_APPLY; |
0f2d19dd JB |
2357 | #ifdef CCLO |
2358 | evap2: | |
2359 | #endif | |
6dbd0af5 MD |
2360 | switch (SCM_TYP7 (proc)) |
2361 | { /* have two arguments */ | |
2362 | case scm_tc7_subr_2: | |
2363 | case scm_tc7_subr_2o: | |
2364 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2365 | case scm_tc7_lsubr: | |
0f2d19dd | 2366 | #ifdef DEVAL |
6dbd0af5 MD |
2367 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
2368 | #else | |
2369 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, arg2, SCM_EOL))); | |
0f2d19dd | 2370 | #endif |
6dbd0af5 MD |
2371 | case scm_tc7_lsubr_2: |
2372 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_EOL)); | |
2373 | case scm_tc7_rpsubr: | |
2374 | case scm_tc7_asubr: | |
2375 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2376 | #ifdef CCLO | |
2377 | cclon: | |
2378 | case scm_tc7_cclo: | |
0f2d19dd | 2379 | #ifdef DEVAL |
6dbd0af5 MD |
2380 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), proc, |
2381 | scm_cons (debug.info->a.args, SCM_EOL))); | |
0f2d19dd | 2382 | #else |
6dbd0af5 MD |
2383 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), proc, |
2384 | scm_cons2 (t.arg1, arg2, | |
680ed4a8 | 2385 | scm_cons (scm_eval_args (x, env, proc), |
da7f71d7 | 2386 | SCM_EOL)))); |
0f2d19dd | 2387 | #endif |
6dbd0af5 MD |
2388 | /* case scm_tc7_cclo: |
2389 | x = scm_cons(arg2, scm_eval_args(x, env)); | |
2390 | arg2 = t.arg1; | |
2391 | t.arg1 = proc; | |
2392 | proc = SCM_CCLO_SUBR(proc); | |
2393 | goto evap3; */ | |
2394 | #endif | |
0c32d76c | 2395 | case scm_tcs_cons_gloc: |
9b07e212 MD |
2396 | if (!SCM_I_OPERATORP (proc)) |
2397 | goto badfun; | |
2398 | else | |
0c32d76c | 2399 | { |
da7f71d7 MD |
2400 | x = (SCM_I_ENTITYP (proc) |
2401 | ? SCM_ENTITY_PROC_2 (proc) | |
2402 | : SCM_OPERATOR_PROC_2 (proc)); | |
2403 | if (SCM_NIMP (x)) | |
33b97402 MD |
2404 | { |
2405 | if (SCM_TYP7 (x) == scm_tc7_subr_3) | |
2406 | RETURN (SCM_SUBRF (x) (proc, t.arg1, arg2)) | |
2407 | else if (SCM_CLOSUREP (x)) | |
2408 | { | |
0c32d76c | 2409 | #ifdef DEVAL |
33b97402 MD |
2410 | SCM_SET_ARGSREADY (debug); |
2411 | debug.info->a.args = scm_cons (proc, | |
2412 | debug.info->a.args); | |
2413 | debug.info->a.proc = x; | |
2414 | #endif | |
2415 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (x)), | |
2416 | scm_cons2 (proc, t.arg1, | |
65e41721 | 2417 | scm_cons (arg2, SCM_EOL)), |
33b97402 MD |
2418 | SCM_ENV (x)); |
2419 | x = SCM_CODE (x); | |
2420 | goto cdrxbegin; | |
2421 | } | |
2422 | } | |
0c32d76c MD |
2423 | /* Fall through. */ |
2424 | } | |
6dbd0af5 MD |
2425 | case scm_tc7_subr_0: |
2426 | case scm_tc7_cxr: | |
2427 | case scm_tc7_subr_1o: | |
2428 | case scm_tc7_subr_1: | |
2429 | case scm_tc7_subr_3: | |
2430 | case scm_tc7_contin: | |
2431 | goto wrongnumargs; | |
2432 | default: | |
2433 | goto badfun; | |
2434 | case scm_tcs_closures: | |
0c32d76c | 2435 | clos2: |
0f2d19dd | 2436 | #ifdef DEVAL |
da7f71d7 MD |
2437 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
2438 | debug.info->a.args, | |
2439 | SCM_ENV (proc)); | |
0f2d19dd | 2440 | #else |
da7f71d7 MD |
2441 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
2442 | scm_cons2 (t.arg1, arg2, SCM_EOL), SCM_ENV (proc)); | |
0f2d19dd | 2443 | #endif |
6dbd0af5 MD |
2444 | x = SCM_CODE (proc); |
2445 | goto cdrxbegin; | |
2446 | } | |
0f2d19dd | 2447 | } |
cf7c17e9 | 2448 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
2449 | if (SCM_IMP (x) || SCM_NECONSP (x)) |
2450 | goto wrongnumargs; | |
2451 | #endif | |
0f2d19dd | 2452 | #ifdef DEVAL |
6dbd0af5 | 2453 | debug.info->a.args = scm_cons2 (t.arg1, arg2, |
680ed4a8 MD |
2454 | scm_deval_args (x, env, proc, |
2455 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
0f2d19dd | 2456 | #endif |
6dbd0af5 MD |
2457 | ENTER_APPLY; |
2458 | switch (SCM_TYP7 (proc)) | |
2459 | { /* have 3 or more arguments */ | |
0f2d19dd | 2460 | #ifdef DEVAL |
6dbd0af5 MD |
2461 | case scm_tc7_subr_3: |
2462 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
da7f71d7 MD |
2463 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
2464 | SCM_CADDR (debug.info->a.args))); | |
6dbd0af5 | 2465 | case scm_tc7_asubr: |
399dedcc MD |
2466 | #ifdef BUILTIN_RPASUBR |
2467 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
2468 | arg2 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
2469 | do |
2470 | { | |
2471 | t.arg1 = SCM_SUBRF(proc)(t.arg1, SCM_CAR (arg2)); | |
2472 | arg2 = SCM_CDR (arg2); | |
2473 | } | |
2474 | while (SCM_NIMP (arg2)); | |
399dedcc MD |
2475 | RETURN (t.arg1) |
2476 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 2477 | case scm_tc7_rpsubr: |
71d3aa6d MD |
2478 | #ifdef BUILTIN_RPASUBR |
2479 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
2480 | RETURN (SCM_BOOL_F) | |
2481 | t.arg1 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
2482 | do |
2483 | { | |
2484 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (t.arg1)))) | |
2485 | RETURN (SCM_BOOL_F) | |
2486 | arg2 = SCM_CAR (t.arg1); | |
2487 | t.arg1 = SCM_CDR (t.arg1); | |
2488 | } | |
2489 | while (SCM_NIMP (t.arg1)); | |
71d3aa6d MD |
2490 | RETURN (SCM_BOOL_T) |
2491 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 MD |
2492 | RETURN (SCM_APPLY (proc, t.arg1, |
2493 | scm_acons (arg2, | |
2494 | SCM_CDR (SCM_CDR (debug.info->a.args)), | |
2495 | SCM_EOL))) | |
71d3aa6d | 2496 | #endif /* BUILTIN_RPASUBR */ |
399dedcc | 2497 | case scm_tc7_lsubr_2: |
da7f71d7 MD |
2498 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
2499 | SCM_CDR (SCM_CDR (debug.info->a.args)))) | |
399dedcc MD |
2500 | case scm_tc7_lsubr: |
2501 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) | |
0f2d19dd | 2502 | #ifdef CCLO |
6dbd0af5 MD |
2503 | case scm_tc7_cclo: |
2504 | goto cclon; | |
0f2d19dd | 2505 | #endif |
6dbd0af5 | 2506 | case scm_tcs_closures: |
b7ff98dd | 2507 | SCM_SET_ARGSREADY (debug); |
e2806c10 | 2508 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
6dbd0af5 MD |
2509 | debug.info->a.args, |
2510 | SCM_ENV (proc)); | |
2511 | x = SCM_CODE (proc); | |
2512 | goto cdrxbegin; | |
2513 | #else /* DEVAL */ | |
2514 | case scm_tc7_subr_3: | |
2515 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
2516 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, EVALCAR (x, env))); | |
2517 | case scm_tc7_asubr: | |
399dedcc | 2518 | #ifdef BUILTIN_RPASUBR |
da7f71d7 MD |
2519 | t.arg1 = SCM_SUBRF (proc) (t.arg1, arg2); |
2520 | do | |
2521 | { | |
2522 | t.arg1 = SCM_SUBRF(proc)(t.arg1, EVALCAR(x, env)); | |
2523 | x = SCM_CDR(x); | |
2524 | } | |
2525 | while (SCM_NIMP (x)); | |
399dedcc MD |
2526 | RETURN (t.arg1) |
2527 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 2528 | case scm_tc7_rpsubr: |
71d3aa6d MD |
2529 | #ifdef BUILTIN_RPASUBR |
2530 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
2531 | RETURN (SCM_BOOL_F) | |
da7f71d7 MD |
2532 | do |
2533 | { | |
2534 | t.arg1 = EVALCAR (x, env); | |
2535 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, t.arg1))) | |
2536 | RETURN (SCM_BOOL_F) | |
2537 | arg2 = t.arg1; | |
2538 | x = SCM_CDR (x); | |
2539 | } | |
2540 | while (SCM_NIMP (x)); | |
71d3aa6d MD |
2541 | RETURN (SCM_BOOL_T) |
2542 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 | 2543 | RETURN (SCM_APPLY (proc, t.arg1, |
680ed4a8 MD |
2544 | scm_acons (arg2, |
2545 | scm_eval_args (x, env, proc), | |
2546 | SCM_EOL))); | |
71d3aa6d | 2547 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 2548 | case scm_tc7_lsubr_2: |
680ed4a8 | 2549 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, scm_eval_args (x, env, proc))); |
6dbd0af5 | 2550 | case scm_tc7_lsubr: |
680ed4a8 MD |
2551 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, |
2552 | arg2, | |
2553 | scm_eval_args (x, env, proc)))); | |
0f2d19dd | 2554 | #ifdef CCLO |
6dbd0af5 MD |
2555 | case scm_tc7_cclo: |
2556 | goto cclon; | |
0f2d19dd | 2557 | #endif |
6dbd0af5 MD |
2558 | case scm_tcs_closures: |
2559 | #ifdef DEVAL | |
b7ff98dd | 2560 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 2561 | #endif |
e2806c10 | 2562 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
680ed4a8 MD |
2563 | scm_cons2 (t.arg1, |
2564 | arg2, | |
2565 | scm_eval_args (x, env, proc)), | |
6dbd0af5 MD |
2566 | SCM_ENV (proc)); |
2567 | x = SCM_CODE (proc); | |
2568 | goto cdrxbegin; | |
0f2d19dd | 2569 | #endif /* DEVAL */ |
0c32d76c | 2570 | case scm_tcs_cons_gloc: |
9b07e212 MD |
2571 | if (!SCM_I_OPERATORP (proc)) |
2572 | goto badfun; | |
2573 | else | |
da7f71d7 MD |
2574 | { |
2575 | SCM p = (SCM_I_ENTITYP (proc) | |
2576 | ? SCM_ENTITY_PROC_3 (proc) | |
2577 | : SCM_OPERATOR_PROC_3 (proc)); | |
2578 | if (SCM_NIMP (p)) | |
33b97402 MD |
2579 | { |
2580 | if (SCM_TYP7 (p) == scm_tc7_lsubr_2) | |
da7f71d7 | 2581 | #ifdef DEVAL |
33b97402 MD |
2582 | RETURN (SCM_SUBRF (p) (proc, t.arg1, |
2583 | scm_cons (arg2, SCM_CDDR (debug.info->a.args)))) | |
da7f71d7 | 2584 | #else |
33b97402 MD |
2585 | RETURN (SCM_SUBRF (p) (proc, t.arg1, |
2586 | scm_cons (arg2, | |
680ed4a8 | 2587 | scm_eval_args (x, env, proc)))) |
da7f71d7 | 2588 | #endif |
33b97402 MD |
2589 | else if (SCM_CLOSUREP (p)) |
2590 | { | |
da7f71d7 | 2591 | #ifdef DEVAL |
33b97402 MD |
2592 | SCM_SET_ARGSREADY (debug); |
2593 | debug.info->a.args = scm_cons (proc, debug.info->a.args); | |
2594 | debug.info->a.proc = p; | |
2595 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (p)), | |
2596 | scm_cons2 (proc, t.arg1, | |
2597 | scm_cons (arg2, | |
2598 | SCM_CDDDR (debug.info->a.args))), | |
2599 | SCM_ENV (p)); | |
da7f71d7 | 2600 | #else |
33b97402 MD |
2601 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (p)), |
2602 | scm_cons2 (proc, t.arg1, | |
2603 | scm_cons (arg2, | |
680ed4a8 | 2604 | scm_eval_args (x, env, proc))), |
33b97402 MD |
2605 | SCM_ENV (p)); |
2606 | #endif | |
2607 | x = SCM_CODE (p); | |
2608 | goto cdrxbegin; | |
2609 | } | |
2610 | } | |
da7f71d7 MD |
2611 | /* Fall through. */ |
2612 | } | |
6dbd0af5 MD |
2613 | case scm_tc7_subr_2: |
2614 | case scm_tc7_subr_1o: | |
2615 | case scm_tc7_subr_2o: | |
2616 | case scm_tc7_subr_0: | |
2617 | case scm_tc7_cxr: | |
2618 | case scm_tc7_subr_1: | |
2619 | case scm_tc7_contin: | |
2620 | goto wrongnumargs; | |
2621 | default: | |
2622 | goto badfun; | |
2623 | } | |
0f2d19dd JB |
2624 | } |
2625 | #ifdef DEVAL | |
6dbd0af5 | 2626 | exit: |
b6d75948 | 2627 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 2628 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 2629 | { |
b7ff98dd MD |
2630 | SCM_CLEAR_TRACED_FRAME (debug); |
2631 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 2632 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
2633 | else |
2634 | { | |
2635 | scm_make_cont (&t.arg1); | |
ca6ef71a | 2636 | if (setjmp (SCM_JMPBUF (t.arg1))) |
6dbd0af5 MD |
2637 | { |
2638 | proc = SCM_THROW_VALUE (t.arg1); | |
2639 | goto ret; | |
2640 | } | |
2641 | } | |
2642 | scm_ithrow (scm_i_exit_frame, scm_cons2 (t.arg1, proc, SCM_EOL), 0); | |
2643 | } | |
2644 | ret: | |
1646d37b | 2645 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
2646 | return proc; |
2647 | #endif | |
2648 | } | |
2649 | ||
6dbd0af5 MD |
2650 | |
2651 | /* SECTION: This code is compiled once. | |
2652 | */ | |
2653 | ||
0f2d19dd JB |
2654 | #ifndef DEVAL |
2655 | ||
82a2622a | 2656 | /* This code processes the arguments to apply: |
b145c172 JB |
2657 | |
2658 | (apply PROC ARG1 ... ARGS) | |
2659 | ||
82a2622a JB |
2660 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
2661 | ... arguments onto the front of ARGS, and returns the resulting | |
2662 | list. Note that ARGS is a list; thus, the argument to this | |
2663 | function is a list whose last element is a list. | |
2664 | ||
2665 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
2666 | result. apply:nconc2last takes care of building the list of |
2667 | arguments, given (ARG1 ... ARGS). | |
2668 | ||
82a2622a JB |
2669 | Rather than do new consing, apply:nconc2last destroys its argument. |
2670 | On that topic, this code came into my care with the following | |
2671 | beautifully cryptic comment on that topic: "This will only screw | |
2672 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
2673 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 2674 | |
0f2d19dd | 2675 | SCM_PROC(s_nconc2last, "apply:nconc2last", 1, 0, 0, scm_nconc2last); |
1cc91f1b | 2676 | |
0f2d19dd JB |
2677 | SCM |
2678 | scm_nconc2last (lst) | |
2679 | SCM lst; | |
0f2d19dd JB |
2680 | { |
2681 | SCM *lloc; | |
b145c172 | 2682 | SCM_ASSERT (scm_ilength (lst) > 0, lst, SCM_ARG1, s_nconc2last); |
0f2d19dd JB |
2683 | lloc = &lst; |
2684 | while (SCM_NNULLP (SCM_CDR (*lloc))) | |
a23afe53 | 2685 | lloc = SCM_CDRLOC (*lloc); |
b145c172 | 2686 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, s_nconc2last); |
0f2d19dd JB |
2687 | *lloc = SCM_CAR (*lloc); |
2688 | return lst; | |
2689 | } | |
2690 | ||
2691 | #endif /* !DEVAL */ | |
2692 | ||
6dbd0af5 MD |
2693 | |
2694 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
2695 | * It is compiled twice. | |
2696 | */ | |
2697 | ||
0f2d19dd | 2698 | #if 0 |
1cc91f1b | 2699 | |
0f2d19dd JB |
2700 | SCM |
2701 | scm_apply (proc, arg1, args) | |
2702 | SCM proc; | |
2703 | SCM arg1; | |
2704 | SCM args; | |
0f2d19dd JB |
2705 | {} |
2706 | #endif | |
2707 | ||
2708 | #if 0 | |
1cc91f1b | 2709 | |
0f2d19dd JB |
2710 | SCM |
2711 | scm_dapply (proc, arg1, args) | |
2712 | SCM proc; | |
2713 | SCM arg1; | |
2714 | SCM args; | |
0f2d19dd JB |
2715 | {} |
2716 | #endif | |
2717 | ||
1cc91f1b | 2718 | |
82a2622a JB |
2719 | /* Apply a function to a list of arguments. |
2720 | ||
2721 | This function is exported to the Scheme level as taking two | |
2722 | required arguments and a tail argument, as if it were: | |
2723 | (lambda (proc arg1 . args) ...) | |
2724 | Thus, if you just have a list of arguments to pass to a procedure, | |
2725 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
2726 | args, pass the first as ARG1, then cons any remaining fixed args | |
2727 | onto the front of your argument list, and pass that as ARGS. */ | |
2728 | ||
0f2d19dd JB |
2729 | SCM |
2730 | SCM_APPLY (proc, arg1, args) | |
2731 | SCM proc; | |
2732 | SCM arg1; | |
2733 | SCM args; | |
0f2d19dd JB |
2734 | { |
2735 | #ifdef DEBUG_EXTENSIONS | |
2736 | #ifdef DEVAL | |
6dbd0af5 | 2737 | scm_debug_frame debug; |
c0ab1b8d | 2738 | scm_debug_info debug_vect_body; |
1646d37b | 2739 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 2740 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 2741 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
2742 | debug.vect[0].a.proc = proc; |
2743 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 2744 | scm_last_debug_frame = &debug; |
0f2d19dd | 2745 | #else |
b7ff98dd | 2746 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
2747 | return scm_dapply (proc, arg1, args); |
2748 | #endif | |
2749 | #endif | |
2750 | ||
2751 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
2752 | |
2753 | /* If ARGS is the empty list, then we're calling apply with only two | |
2754 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
2755 | the case, futz with things so that ARG1 is the first argument to | |
2756 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
2757 | rest. |
2758 | ||
2759 | Setting the debug apply frame args this way is pretty messy. | |
2760 | Perhaps we should store arg1 and args directly in the frame as | |
2761 | received, and let scm_frame_arguments unpack them, because that's | |
2762 | a relatively rare operation. This works for now; if the Guile | |
2763 | developer archives are still around, see Mikael's post of | |
2764 | 11-Apr-97. */ | |
0f2d19dd JB |
2765 | if (SCM_NULLP (args)) |
2766 | { | |
2767 | if (SCM_NULLP (arg1)) | |
30000774 JB |
2768 | { |
2769 | arg1 = SCM_UNDEFINED; | |
2770 | #ifdef DEVAL | |
2771 | debug.vect[0].a.args = SCM_EOL; | |
2772 | #endif | |
2773 | } | |
0f2d19dd JB |
2774 | else |
2775 | { | |
30000774 JB |
2776 | #ifdef DEVAL |
2777 | debug.vect[0].a.args = arg1; | |
2778 | #endif | |
0f2d19dd JB |
2779 | args = SCM_CDR (arg1); |
2780 | arg1 = SCM_CAR (arg1); | |
2781 | } | |
2782 | } | |
2783 | else | |
2784 | { | |
82a2622a | 2785 | /* SCM_ASRTGO(SCM_NIMP(args) && SCM_CONSP(args), wrongnumargs); */ |
0f2d19dd | 2786 | args = scm_nconc2last (args); |
30000774 JB |
2787 | #ifdef DEVAL |
2788 | debug.vect[0].a.args = scm_cons (arg1, args); | |
2789 | #endif | |
0f2d19dd | 2790 | } |
0f2d19dd | 2791 | #ifdef DEVAL |
b6d75948 | 2792 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
2793 | { |
2794 | SCM tmp; | |
b7ff98dd | 2795 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 2796 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
2797 | else |
2798 | { | |
2799 | scm_make_cont (&tmp); | |
ca6ef71a | 2800 | if (setjmp (SCM_JMPBUF (tmp))) |
6dbd0af5 MD |
2801 | goto entap; |
2802 | } | |
2803 | scm_ithrow (scm_i_enter_frame, scm_cons (tmp, SCM_EOL), 0); | |
2804 | } | |
2805 | entap: | |
2806 | ENTER_APPLY; | |
2807 | #endif | |
2808 | #ifdef CCLO | |
2809 | tail: | |
0f2d19dd JB |
2810 | #endif |
2811 | switch (SCM_TYP7 (proc)) | |
2812 | { | |
2813 | case scm_tc7_subr_2o: | |
2814 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
2815 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
2816 | case scm_tc7_subr_2: | |
269861c7 MD |
2817 | SCM_ASRTGO (SCM_NNULLP (args) && SCM_NULLP (SCM_CDR (args)), |
2818 | wrongnumargs); | |
0f2d19dd JB |
2819 | args = SCM_CAR (args); |
2820 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
2821 | case scm_tc7_subr_0: | |
2822 | SCM_ASRTGO (SCM_UNBNDP (arg1), wrongnumargs); | |
2823 | RETURN (SCM_SUBRF (proc) ()) | |
2824 | case scm_tc7_subr_1: | |
2825 | case scm_tc7_subr_1o: | |
2826 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
2827 | RETURN (SCM_SUBRF (proc) (arg1)) | |
2828 | case scm_tc7_cxr: | |
2829 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
2830 | #ifdef SCM_FLOATS | |
2831 | if (SCM_SUBRF (proc)) | |
2832 | { | |
6dbd0af5 MD |
2833 | if (SCM_INUMP (arg1)) |
2834 | { | |
2835 | RETURN (scm_makdbl (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)), 0.0)); | |
2836 | } | |
0f2d19dd | 2837 | SCM_ASRTGO (SCM_NIMP (arg1), floerr); |
6dbd0af5 MD |
2838 | if (SCM_REALP (arg1)) |
2839 | { | |
2840 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (SCM_REALPART (arg1)), 0.0)); | |
2841 | } | |
0f2d19dd JB |
2842 | #ifdef SCM_BIGDIG |
2843 | if SCM_BIGP | |
2844 | (arg1) | |
2845 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (scm_big2dbl (arg1)), 0.0)) | |
2846 | #endif | |
2847 | floerr: | |
2848 | scm_wta (arg1, (char *) SCM_ARG1, SCM_CHARS (SCM_SNAME (proc))); | |
2849 | } | |
2850 | #endif | |
2851 | proc = (SCM) SCM_SNAME (proc); | |
2852 | { | |
2853 | char *chrs = SCM_CHARS (proc) + SCM_LENGTH (proc) - 1; | |
2854 | while ('c' != *--chrs) | |
2855 | { | |
2856 | SCM_ASSERT (SCM_NIMP (arg1) && SCM_CONSP (arg1), | |
2857 | arg1, SCM_ARG1, SCM_CHARS (proc)); | |
2858 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
2859 | } | |
2860 | RETURN (arg1) | |
2861 | } | |
2862 | case scm_tc7_subr_3: | |
2863 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CAR (SCM_CDR (args)))) | |
2864 | case scm_tc7_lsubr: | |
2865 | #ifdef DEVAL | |
6dbd0af5 | 2866 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)) |
0f2d19dd JB |
2867 | #else |
2868 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))) | |
2869 | #endif | |
2870 | case scm_tc7_lsubr_2: | |
2871 | SCM_ASRTGO (SCM_NIMP (args) && SCM_CONSP (args), wrongnumargs); | |
2872 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))) | |
2873 | case scm_tc7_asubr: | |
2874 | if (SCM_NULLP (args)) | |
2875 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)) | |
2876 | while (SCM_NIMP (args)) | |
2877 | { | |
2878 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
2879 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
2880 | args = SCM_CDR (args); | |
2881 | } | |
2882 | RETURN (arg1); | |
2883 | case scm_tc7_rpsubr: | |
2884 | if (SCM_NULLP (args)) | |
2885 | RETURN (SCM_BOOL_T); | |
2886 | while (SCM_NIMP (args)) | |
2887 | { | |
2888 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
2889 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
2890 | RETURN (SCM_BOOL_F); | |
2891 | arg1 = SCM_CAR (args); | |
2892 | args = SCM_CDR (args); | |
2893 | } | |
2894 | RETURN (SCM_BOOL_T); | |
2895 | case scm_tcs_closures: | |
2896 | #ifdef DEVAL | |
6dbd0af5 | 2897 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
2898 | #else |
2899 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
2900 | #endif | |
cf7c17e9 | 2901 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
2902 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), arg1)) |
2903 | goto wrongnumargs; | |
2904 | #endif | |
1609038c MD |
2905 | |
2906 | /* Copy argument list */ | |
2907 | if (SCM_IMP (arg1)) | |
2908 | args = arg1; | |
2909 | else | |
2910 | { | |
2911 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
2912 | while (SCM_NIMP (arg1 = SCM_CDR (arg1)) | |
2913 | && SCM_CONSP (arg1)) | |
2914 | { | |
2915 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
2916 | SCM_UNSPECIFIED)); | |
2917 | tl = SCM_CDR (tl); | |
2918 | } | |
2919 | SCM_SETCDR (tl, arg1); | |
2920 | } | |
2921 | ||
2922 | args = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), args, SCM_ENV (proc)); | |
0f2d19dd JB |
2923 | proc = SCM_CODE (proc); |
2924 | while (SCM_NNULLP (proc = SCM_CDR (proc))) | |
2925 | arg1 = EVALCAR (proc, args); | |
2926 | RETURN (arg1); | |
2927 | case scm_tc7_contin: | |
2928 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
2929 | scm_call_continuation (proc, arg1); | |
2930 | #ifdef CCLO | |
2931 | case scm_tc7_cclo: | |
2932 | #ifdef DEVAL | |
6dbd0af5 MD |
2933 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
2934 | arg1 = proc; | |
2935 | proc = SCM_CCLO_SUBR (proc); | |
2936 | debug.vect[0].a.proc = proc; | |
2937 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
2938 | #else |
2939 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
2940 | arg1 = proc; |
2941 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 2942 | #endif |
0f2d19dd JB |
2943 | goto tail; |
2944 | #endif | |
0c32d76c | 2945 | case scm_tcs_cons_gloc: |
9b07e212 MD |
2946 | if (!SCM_I_OPERATORP (proc)) |
2947 | goto badproc; | |
2948 | else | |
da7f71d7 MD |
2949 | { |
2950 | #ifdef DEVAL | |
2951 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
2952 | #else | |
2953 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
2954 | #endif | |
2955 | arg1 = proc; | |
2956 | proc = (SCM_NULLP (args) | |
2957 | ? (SCM_I_ENTITYP (proc) | |
2958 | ? SCM_ENTITY_PROC_0 (proc) | |
2959 | : SCM_OPERATOR_PROC_0 (proc)) | |
2960 | : SCM_NULLP (SCM_CDR (args)) | |
2961 | ? (SCM_I_ENTITYP (proc) | |
2962 | ? SCM_ENTITY_PROC_1 (proc) | |
2963 | : SCM_OPERATOR_PROC_1 (proc)) | |
2964 | : SCM_NULLP (SCM_CDDR (args)) | |
2965 | ? (SCM_I_ENTITYP (proc) | |
2966 | ? SCM_ENTITY_PROC_2 (proc) | |
2967 | : SCM_OPERATOR_PROC_2 (proc)) | |
2968 | : (SCM_I_ENTITYP (proc) | |
2969 | ? SCM_ENTITY_PROC_3 (proc) | |
2970 | : SCM_OPERATOR_PROC_3 (proc))); | |
2971 | #ifdef DEVAL | |
2972 | debug.vect[0].a.proc = proc; | |
2973 | debug.vect[0].a.args = scm_cons (arg1, args); | |
2974 | #endif | |
2975 | goto tail; | |
2976 | } | |
0f2d19dd | 2977 | wrongnumargs: |
f5bf2977 | 2978 | scm_wrong_num_args (proc); |
0f2d19dd JB |
2979 | default: |
2980 | badproc: | |
2981 | scm_wta (proc, (char *) SCM_ARG1, "apply"); | |
2982 | RETURN (arg1); | |
2983 | } | |
2984 | #ifdef DEVAL | |
6dbd0af5 | 2985 | exit: |
b6d75948 | 2986 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 2987 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 2988 | { |
b7ff98dd MD |
2989 | SCM_CLEAR_TRACED_FRAME (debug); |
2990 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 2991 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
2992 | else |
2993 | { | |
2994 | scm_make_cont (&arg1); | |
ca6ef71a | 2995 | if (setjmp (SCM_JMPBUF (arg1))) |
6dbd0af5 MD |
2996 | { |
2997 | proc = SCM_THROW_VALUE (arg1); | |
2998 | goto ret; | |
2999 | } | |
3000 | } | |
3001 | scm_ithrow (scm_i_exit_frame, scm_cons2 (arg1, proc, SCM_EOL), 0); | |
3002 | } | |
3003 | ret: | |
1646d37b | 3004 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3005 | return proc; |
3006 | #endif | |
3007 | } | |
3008 | ||
6dbd0af5 MD |
3009 | |
3010 | /* SECTION: The rest of this file is only read once. | |
3011 | */ | |
3012 | ||
0f2d19dd JB |
3013 | #ifndef DEVAL |
3014 | ||
6cb702da | 3015 | SCM_PROC (s_map, "map", 2, 0, 1, scm_map); |
1cc91f1b | 3016 | |
368bf056 MD |
3017 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3018 | sequentially, starting with the first element(s). This is used in | |
3019 | evalext.c where the Scheme procedure `serial-map', which guarantees | |
3020 | sequential behaviour, is implemented using scm_map. If the | |
3021 | behaviour changes, we need to update `serial-map'. | |
3022 | */ | |
3023 | ||
0f2d19dd JB |
3024 | SCM |
3025 | scm_map (proc, arg1, args) | |
3026 | SCM proc; | |
3027 | SCM arg1; | |
3028 | SCM args; | |
0f2d19dd JB |
3029 | { |
3030 | long i; | |
3031 | SCM res = SCM_EOL; | |
3032 | SCM *pres = &res; | |
3033 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3034 | ||
3035 | if (SCM_NULLP (arg1)) | |
3036 | return res; | |
3037 | SCM_ASSERT (SCM_NIMP (arg1), arg1, SCM_ARG2, s_map); | |
3038 | if (SCM_NULLP (args)) | |
3039 | { | |
3040 | while (SCM_NIMP (arg1)) | |
3041 | { | |
3042 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG2, s_map); | |
3043 | *pres = scm_cons (scm_apply (proc, SCM_CAR (arg1), scm_listofnull), SCM_EOL); | |
a23afe53 | 3044 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3045 | arg1 = SCM_CDR (arg1); |
3046 | } | |
3047 | return res; | |
3048 | } | |
3049 | args = scm_vector (scm_cons (arg1, args)); | |
3050 | ve = SCM_VELTS (args); | |
cf7c17e9 | 3051 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
3052 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) |
3053 | SCM_ASSERT (SCM_NIMP (ve[i]) && SCM_CONSP (ve[i]), args, SCM_ARG2, s_map); | |
3054 | #endif | |
3055 | while (1) | |
3056 | { | |
3057 | arg1 = SCM_EOL; | |
3058 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
3059 | { | |
3060 | if SCM_IMP | |
3061 | (ve[i]) return res; | |
3062 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3063 | ve[i] = SCM_CDR (ve[i]); | |
3064 | } | |
3065 | *pres = scm_cons (scm_apply (proc, arg1, SCM_EOL), SCM_EOL); | |
a23afe53 | 3066 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3067 | } |
3068 | } | |
3069 | ||
3070 | ||
3071 | SCM_PROC(s_for_each, "for-each", 2, 0, 1, scm_for_each); | |
1cc91f1b | 3072 | |
0f2d19dd JB |
3073 | SCM |
3074 | scm_for_each (proc, arg1, args) | |
3075 | SCM proc; | |
3076 | SCM arg1; | |
3077 | SCM args; | |
0f2d19dd JB |
3078 | { |
3079 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3080 | long i; | |
3081 | if SCM_NULLP (arg1) | |
3082 | return SCM_UNSPECIFIED; | |
3083 | SCM_ASSERT (SCM_NIMP (arg1), arg1, SCM_ARG2, s_for_each); | |
3084 | if SCM_NULLP (args) | |
3085 | { | |
3086 | while SCM_NIMP (arg1) | |
3087 | { | |
3088 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG2, s_for_each); | |
3089 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); | |
3090 | arg1 = SCM_CDR (arg1); | |
3091 | } | |
3092 | return SCM_UNSPECIFIED; | |
3093 | } | |
3094 | args = scm_vector (scm_cons (arg1, args)); | |
3095 | ve = SCM_VELTS (args); | |
cf7c17e9 | 3096 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
3097 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) |
3098 | SCM_ASSERT (SCM_NIMP (ve[i]) && SCM_CONSP (ve[i]), args, SCM_ARG2, s_for_each); | |
3099 | #endif | |
3100 | while (1) | |
3101 | { | |
3102 | arg1 = SCM_EOL; | |
3103 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
3104 | { | |
3105 | if SCM_IMP | |
3106 | (ve[i]) return SCM_UNSPECIFIED; | |
3107 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3108 | ve[i] = SCM_CDR (ve[i]); | |
3109 | } | |
3110 | scm_apply (proc, arg1, SCM_EOL); | |
3111 | } | |
3112 | } | |
3113 | ||
3114 | ||
1cc91f1b | 3115 | |
0f2d19dd JB |
3116 | SCM |
3117 | scm_closure (code, env) | |
3118 | SCM code; | |
3119 | SCM env; | |
0f2d19dd JB |
3120 | { |
3121 | register SCM z; | |
3122 | SCM_NEWCELL (z); | |
3123 | SCM_SETCODE (z, code); | |
a23afe53 | 3124 | SCM_SETENV (z, env); |
0f2d19dd JB |
3125 | return z; |
3126 | } | |
3127 | ||
3128 | ||
3129 | long scm_tc16_promise; | |
1cc91f1b | 3130 | |
0f2d19dd JB |
3131 | SCM |
3132 | scm_makprom (code) | |
3133 | SCM code; | |
0f2d19dd JB |
3134 | { |
3135 | register SCM z; | |
3136 | SCM_NEWCELL (z); | |
f83e2737 | 3137 | SCM_ENTER_A_SECTION; |
a23afe53 MD |
3138 | SCM_SETCDR (z, code); |
3139 | SCM_SETCAR (z, scm_tc16_promise); | |
f83e2737 | 3140 | SCM_EXIT_A_SECTION; |
0f2d19dd JB |
3141 | return z; |
3142 | } | |
3143 | ||
3144 | ||
1cc91f1b JB |
3145 | |
3146 | static int prinprom SCM_P ((SCM exp, SCM port, scm_print_state *pstate)); | |
3147 | ||
0f2d19dd | 3148 | static int |
19402679 | 3149 | prinprom (exp, port, pstate) |
0f2d19dd JB |
3150 | SCM exp; |
3151 | SCM port; | |
19402679 | 3152 | scm_print_state *pstate; |
0f2d19dd | 3153 | { |
19402679 | 3154 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 3155 | scm_puts ("#<promise ", port); |
19402679 MD |
3156 | SCM_SET_WRITINGP (pstate, 1); |
3157 | scm_iprin1 (SCM_CDR (exp), port, pstate); | |
3158 | SCM_SET_WRITINGP (pstate, writingp); | |
b7f3516f | 3159 | scm_putc ('>', port); |
0f2d19dd JB |
3160 | return !0; |
3161 | } | |
3162 | ||
3163 | ||
0f2d19dd | 3164 | SCM_PROC(s_force, "force", 1, 0, 0, scm_force); |
1cc91f1b | 3165 | |
0f2d19dd JB |
3166 | SCM |
3167 | scm_force (x) | |
3168 | SCM x; | |
0f2d19dd | 3169 | { |
eed6e03e JB |
3170 | SCM_ASSERT (SCM_NIMP(x) && SCM_TYP16 (x) == scm_tc16_promise, |
3171 | x, SCM_ARG1, s_force); | |
0f2d19dd JB |
3172 | if (!((1L << 16) & SCM_CAR (x))) |
3173 | { | |
3174 | SCM ans = scm_apply (SCM_CDR (x), SCM_EOL, SCM_EOL); | |
3175 | if (!((1L << 16) & SCM_CAR (x))) | |
3176 | { | |
3177 | SCM_DEFER_INTS; | |
a23afe53 MD |
3178 | SCM_SETCDR (x, ans); |
3179 | SCM_SETOR_CAR (x, (1L << 16)); | |
0f2d19dd JB |
3180 | SCM_ALLOW_INTS; |
3181 | } | |
3182 | } | |
3183 | return SCM_CDR (x); | |
3184 | } | |
3185 | ||
3186 | SCM_PROC (s_promise_p, "promise?", 1, 0, 0, scm_promise_p); | |
1cc91f1b | 3187 | |
0f2d19dd JB |
3188 | SCM |
3189 | scm_promise_p (x) | |
3190 | SCM x; | |
0f2d19dd JB |
3191 | { |
3192 | return ((SCM_NIMP (x) && (SCM_TYP16 (x) == scm_tc16_promise)) | |
3193 | ? SCM_BOOL_T | |
3194 | : SCM_BOOL_F); | |
3195 | } | |
3196 | ||
3197 | SCM_PROC(s_copy_tree, "copy-tree", 1, 0, 0, scm_copy_tree); | |
1cc91f1b | 3198 | |
0f2d19dd JB |
3199 | SCM |
3200 | scm_copy_tree (obj) | |
3201 | SCM obj; | |
0f2d19dd JB |
3202 | { |
3203 | SCM ans, tl; | |
3204 | if SCM_IMP | |
3205 | (obj) return obj; | |
3910272e MD |
3206 | if (SCM_VECTORP (obj)) |
3207 | { | |
3208 | scm_sizet i = SCM_LENGTH (obj); | |
3209 | ans = scm_make_vector (SCM_MAKINUM (i), SCM_UNSPECIFIED); | |
3210 | while (i--) | |
3211 | SCM_VELTS (ans)[i] = scm_copy_tree (SCM_VELTS (obj)[i]); | |
3212 | return ans; | |
3213 | } | |
0f2d19dd JB |
3214 | if SCM_NCONSP (obj) |
3215 | return obj; | |
3216 | /* return scm_cons(scm_copy_tree(SCM_CAR(obj)), scm_copy_tree(SCM_CDR(obj))); */ | |
3217 | ans = tl = scm_cons (scm_copy_tree (SCM_CAR (obj)), SCM_UNSPECIFIED); | |
067affe3 MD |
3218 | { |
3219 | /* Copy source properties possibly associated with head pair. */ | |
3220 | SCM p = scm_whash_lookup (scm_source_whash, obj); | |
3221 | if (SCM_NIMP (p)) | |
3222 | scm_whash_insert (scm_source_whash, ans, p); | |
3223 | } | |
0f2d19dd | 3224 | while (SCM_NIMP (obj = SCM_CDR (obj)) && SCM_CONSP (obj)) |
a23afe53 MD |
3225 | { |
3226 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
3227 | SCM_UNSPECIFIED)); | |
3228 | tl = SCM_CDR (tl); | |
3229 | } | |
3230 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
3231 | return ans; |
3232 | } | |
3233 | ||
1cc91f1b | 3234 | |
0f2d19dd JB |
3235 | SCM |
3236 | scm_eval_3 (obj, copyp, env) | |
3237 | SCM obj; | |
3238 | int copyp; | |
3239 | SCM env; | |
0f2d19dd JB |
3240 | { |
3241 | if (SCM_NIMP (SCM_CDR (scm_system_transformer))) | |
3242 | obj = scm_apply (SCM_CDR (scm_system_transformer), obj, scm_listofnull); | |
3243 | else if (copyp) | |
3244 | obj = scm_copy_tree (obj); | |
6cb702da | 3245 | return SCM_XEVAL (obj, env); |
0f2d19dd JB |
3246 | } |
3247 | ||
1cc91f1b | 3248 | |
0f2d19dd JB |
3249 | SCM |
3250 | scm_top_level_env (thunk) | |
3251 | SCM thunk; | |
0f2d19dd JB |
3252 | { |
3253 | if (SCM_IMP(thunk)) | |
3254 | return SCM_EOL; | |
3255 | else | |
3256 | return scm_cons(thunk, (SCM)SCM_EOL); | |
3257 | } | |
3258 | ||
3259 | SCM_PROC(s_eval2, "eval2", 2, 0, 0, scm_eval2); | |
1cc91f1b | 3260 | |
0f2d19dd JB |
3261 | SCM |
3262 | scm_eval2 (obj, env_thunk) | |
3263 | SCM obj; | |
3264 | SCM env_thunk; | |
0f2d19dd JB |
3265 | { |
3266 | return scm_eval_3 (obj, 1, scm_top_level_env(env_thunk)); | |
3267 | } | |
3268 | ||
3269 | SCM_PROC(s_eval, "eval", 1, 0, 0, scm_eval); | |
1cc91f1b | 3270 | |
0f2d19dd JB |
3271 | SCM |
3272 | scm_eval (obj) | |
3273 | SCM obj; | |
0f2d19dd JB |
3274 | { |
3275 | return | |
dc19d1d2 | 3276 | scm_eval_3(obj, 1, scm_top_level_env(SCM_CDR(scm_top_level_lookup_closure_var))); |
0f2d19dd JB |
3277 | } |
3278 | ||
11f77bfc | 3279 | /* SCM_PROC(s_eval_x, "eval!", 1, 0, 0, scm_eval_x); */ |
1cc91f1b | 3280 | |
0f2d19dd JB |
3281 | SCM |
3282 | scm_eval_x (obj) | |
3283 | SCM obj; | |
0f2d19dd JB |
3284 | { |
3285 | return | |
3286 | scm_eval_3(obj, | |
3287 | 0, | |
dc19d1d2 | 3288 | scm_top_level_env (SCM_CDR (scm_top_level_lookup_closure_var))); |
0f2d19dd JB |
3289 | } |
3290 | ||
7332df66 | 3291 | static scm_smobfuns promsmob = {scm_markcdr, scm_free0, prinprom}; |
0f2d19dd | 3292 | |
6dbd0af5 MD |
3293 | |
3294 | /* At this point, scm_deval and scm_dapply are generated. | |
3295 | */ | |
3296 | ||
0f2d19dd | 3297 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
3298 | # define DEVAL |
3299 | # include "eval.c" | |
0f2d19dd JB |
3300 | #endif |
3301 | ||
3302 | ||
1cc91f1b | 3303 | |
0f2d19dd JB |
3304 | void |
3305 | scm_init_eval () | |
0f2d19dd | 3306 | { |
33b97402 MD |
3307 | scm_init_opts (scm_evaluator_traps, |
3308 | scm_evaluator_trap_table, | |
3309 | SCM_N_EVALUATOR_TRAPS); | |
3310 | scm_init_opts (scm_eval_options_interface, | |
3311 | scm_eval_opts, | |
3312 | SCM_N_EVAL_OPTIONS); | |
3313 | ||
0f2d19dd | 3314 | scm_tc16_promise = scm_newsmob (&promsmob); |
0f2d19dd JB |
3315 | scm_i_apply = scm_make_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
3316 | scm_system_transformer = scm_sysintern ("scm:eval-transformer", SCM_UNDEFINED); | |
3317 | scm_i_dot = SCM_CAR (scm_sysintern (".", SCM_UNDEFINED)); | |
3318 | scm_i_arrow = SCM_CAR (scm_sysintern ("=>", SCM_UNDEFINED)); | |
3319 | scm_i_else = SCM_CAR (scm_sysintern ("else", SCM_UNDEFINED)); | |
3320 | scm_i_unquote = SCM_CAR (scm_sysintern ("unquote", SCM_UNDEFINED)); | |
3321 | scm_i_uq_splicing = SCM_CAR (scm_sysintern ("unquote-splicing", SCM_UNDEFINED)); | |
3322 | ||
3323 | /* acros */ | |
3324 | scm_i_quasiquote = scm_make_synt (s_quasiquote, scm_makacro, scm_m_quasiquote); | |
0f2d19dd JB |
3325 | scm_make_synt (s_delay, scm_makacro, scm_m_delay); |
3326 | /* end of acros */ | |
3327 | ||
dc19d1d2 JB |
3328 | scm_top_level_lookup_closure_var = |
3329 | scm_sysintern("*top-level-lookup-closure*", SCM_BOOL_F); | |
9b8d3288 | 3330 | scm_can_use_top_level_lookup_closure_var = 1; |
0f2d19dd | 3331 | |
6dbd0af5 MD |
3332 | scm_i_and = scm_make_synt ("and", scm_makmmacro, scm_m_and); |
3333 | scm_i_begin = scm_make_synt ("begin", scm_makmmacro, scm_m_begin); | |
3334 | scm_i_case = scm_make_synt ("case", scm_makmmacro, scm_m_case); | |
3335 | scm_i_cond = scm_make_synt ("cond", scm_makmmacro, scm_m_cond); | |
3336 | scm_i_define = scm_make_synt ("define", scm_makmmacro, scm_m_define); | |
3337 | scm_i_do = scm_make_synt ("do", scm_makmmacro, scm_m_do); | |
3338 | scm_i_if = scm_make_synt ("if", scm_makmmacro, scm_m_if); | |
0f2d19dd JB |
3339 | scm_i_lambda = scm_make_synt ("lambda", scm_makmmacro, scm_m_lambda); |
3340 | scm_i_let = scm_make_synt ("let", scm_makmmacro, scm_m_let); | |
6dbd0af5 MD |
3341 | scm_i_letrec = scm_make_synt ("letrec", scm_makmmacro, scm_m_letrec); |
3342 | scm_i_letstar = scm_make_synt ("let*", scm_makmmacro, scm_m_letstar); | |
3343 | scm_i_or = scm_make_synt ("or", scm_makmmacro, scm_m_or); | |
0f2d19dd | 3344 | scm_i_quote = scm_make_synt ("quote", scm_makmmacro, scm_m_quote); |
6dbd0af5 MD |
3345 | scm_i_set = scm_make_synt ("set!", scm_makmmacro, scm_m_set); |
3346 | scm_i_atapply = scm_make_synt ("@apply", scm_makmmacro, scm_m_apply); | |
3347 | scm_i_atcall_cc = scm_make_synt ("@call-with-current-continuation", | |
3348 | scm_makmmacro, scm_m_cont); | |
3349 | ||
6dbd0af5 MD |
3350 | #ifdef DEBUG_EXTENSIONS |
3351 | scm_i_enter_frame = SCM_CAR (scm_sysintern ("enter-frame", SCM_UNDEFINED)); | |
3352 | scm_i_apply_frame = SCM_CAR (scm_sysintern ("apply-frame", SCM_UNDEFINED)); | |
3353 | scm_i_exit_frame = SCM_CAR (scm_sysintern ("exit-frame", SCM_UNDEFINED)); | |
3354 | scm_i_trace = SCM_CAR (scm_sysintern ("trace", SCM_UNDEFINED)); | |
3355 | #endif | |
3356 | ||
0f2d19dd | 3357 | #include "eval.x" |
25eaf21a MD |
3358 | |
3359 | scm_add_feature ("delay"); | |
0f2d19dd | 3360 | } |
0f2d19dd | 3361 | |
6dbd0af5 | 3362 | #endif /* !DEVAL */ |