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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 | ||
3eeba8d4 JB |
429 | const char scm_s_expression[] = "missing or extra expression"; |
430 | const char scm_s_test[] = "bad test"; | |
431 | const char scm_s_body[] = "bad body"; | |
432 | const char scm_s_bindings[] = "bad bindings"; | |
433 | const char scm_s_variable[] = "bad variable"; | |
434 | const char scm_s_clauses[] = "bad or missing clauses"; | |
435 | const char scm_s_formals[] = "bad formals"; | |
0f2d19dd | 436 | |
b8229a3b MS |
437 | SCM scm_i_dot, scm_i_arrow, scm_i_else, scm_i_unquote, scm_i_uq_splicing, scm_i_apply; |
438 | ||
6dbd0af5 MD |
439 | #ifdef DEBUG_EXTENSIONS |
440 | SCM scm_i_enter_frame, scm_i_apply_frame, scm_i_exit_frame; | |
441 | SCM scm_i_trace; | |
442 | #endif | |
0f2d19dd JB |
443 | |
444 | #define ASRTSYNTAX(cond_, msg_) if(!(cond_))scm_wta(xorig, (msg_), what); | |
445 | ||
446 | ||
1cc91f1b JB |
447 | |
448 | static void bodycheck SCM_P ((SCM xorig, SCM *bodyloc, char *what)); | |
449 | ||
0f2d19dd JB |
450 | static void |
451 | bodycheck (xorig, bodyloc, what) | |
452 | SCM xorig; | |
453 | SCM *bodyloc; | |
454 | char *what; | |
0f2d19dd | 455 | { |
6cb702da | 456 | ASRTSYNTAX (scm_ilength (*bodyloc) >= 1, scm_s_expression); |
0f2d19dd JB |
457 | } |
458 | ||
b8229a3b MS |
459 | SCM_SYNTAX(s_quote,"quote", scm_makmmacro, scm_m_quote); |
460 | SCM_GLOBAL_SYMBOL(scm_i_quote,s_quote); | |
1cc91f1b | 461 | |
0f2d19dd JB |
462 | SCM |
463 | scm_m_quote (xorig, env) | |
464 | SCM xorig; | |
465 | SCM env; | |
0f2d19dd | 466 | { |
6cb702da | 467 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
b8229a3b | 468 | xorig, scm_s_expression, s_quote); |
0f2d19dd JB |
469 | return scm_cons (SCM_IM_QUOTE, SCM_CDR (xorig)); |
470 | } | |
471 | ||
472 | ||
1cc91f1b | 473 | |
b8229a3b MS |
474 | SCM_SYNTAX(s_begin, "begin", scm_makmmacro, scm_m_begin); |
475 | SCM_SYMBOL(scm_i_begin, s_begin); | |
476 | ||
0f2d19dd JB |
477 | SCM |
478 | scm_m_begin (xorig, env) | |
479 | SCM xorig; | |
480 | SCM env; | |
0f2d19dd | 481 | { |
6cb702da | 482 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 1, |
b8229a3b | 483 | xorig, scm_s_expression, s_begin); |
0f2d19dd JB |
484 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
485 | } | |
486 | ||
b8229a3b MS |
487 | SCM_SYNTAX(s_if, "if", scm_makmmacro, scm_m_if); |
488 | SCM_SYMBOL(scm_i_if, s_if); | |
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 | ||
b8229a3b MS |
501 | SCM_SYNTAX(s_set,"set!", scm_makmmacro, scm_m_set); |
502 | SCM_SYMBOL(scm_i_set,s_set); | |
1cc91f1b | 503 | |
0f2d19dd JB |
504 | SCM |
505 | scm_m_set (xorig, env) | |
506 | SCM xorig; | |
507 | SCM env; | |
0f2d19dd | 508 | { |
6dbd0af5 | 509 | SCM x = SCM_CDR (xorig); |
b8229a3b | 510 | SCM_ASSYNT (2 == scm_ilength (x), xorig, scm_s_expression, s_set); |
6cb702da | 511 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (x)) && SCM_SYMBOLP (SCM_CAR (x)), |
b8229a3b | 512 | xorig, scm_s_variable, s_set); |
0f2d19dd JB |
513 | return scm_cons (SCM_IM_SET, x); |
514 | } | |
515 | ||
516 | ||
517 | #if 0 | |
1cc91f1b | 518 | |
0f2d19dd JB |
519 | SCM |
520 | scm_m_vref (xorig, env) | |
521 | SCM xorig; | |
522 | SCM env; | |
0f2d19dd JB |
523 | { |
524 | SCM x = SCM_CDR (xorig); | |
6cb702da | 525 | SCM_ASSYNT (1 == scm_ilength (x), xorig, scm_s_expression, s_vref); |
0f2d19dd JB |
526 | if (SCM_NIMP(x) && UDSCM_VARIABLEP (SCM_CAR (x))) |
527 | { | |
f5bf2977 | 528 | /* scm_everr (SCM_UNDEFINED, env,..., "global variable reference") */ |
523f5266 GH |
529 | scm_misc_error (NULL, |
530 | "Bad variable: %S", | |
531 | scm_listify (SCM_CAR (SCM_CDR (x)), SCM_UNDEFINED)); | |
0f2d19dd | 532 | } |
6cb702da MD |
533 | SCM_ASSYNT (SCM_NIMP(x) && DEFSCM_VARIABLEP (SCM_CAR (x)), |
534 | xorig, scm_s_variable, s_vref); | |
0f2d19dd JB |
535 | return |
536 | return scm_cons (IM_VREF, x); | |
537 | } | |
538 | ||
539 | ||
1cc91f1b | 540 | |
0f2d19dd JB |
541 | SCM |
542 | scm_m_vset (xorig, env) | |
543 | SCM xorig; | |
544 | SCM env; | |
0f2d19dd JB |
545 | { |
546 | SCM x = SCM_CDR (xorig); | |
6cb702da MD |
547 | SCM_ASSYNT (3 == scm_ilength (x), xorig, scm_s_expression, s_vset); |
548 | SCM_ASSYNT ((DEFSCM_VARIABLEP (SCM_CAR (x)) | |
549 | || UDSCM_VARIABLEP (SCM_CAR (x))), | |
550 | xorig, scm_s_variable, s_vset); | |
0f2d19dd JB |
551 | return scm_cons (IM_VSET, x); |
552 | } | |
553 | #endif | |
554 | ||
555 | ||
b8229a3b MS |
556 | SCM_SYNTAX(s_and, "and", scm_makmmacro, scm_m_and); |
557 | SCM_GLOBAL_SYMBOL(scm_i_and, s_and); | |
1cc91f1b | 558 | |
0f2d19dd JB |
559 | SCM |
560 | scm_m_and (xorig, env) | |
561 | SCM xorig; | |
562 | SCM env; | |
0f2d19dd JB |
563 | { |
564 | int len = scm_ilength (SCM_CDR (xorig)); | |
b8229a3b | 565 | SCM_ASSYNT (len >= 0, xorig, scm_s_test, s_and); |
0f2d19dd JB |
566 | if (len >= 1) |
567 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); | |
568 | else | |
569 | return SCM_BOOL_T; | |
570 | } | |
571 | ||
b8229a3b MS |
572 | SCM_SYNTAX(s_or,"or", scm_makmmacro, scm_m_or); |
573 | SCM_SYMBOL(scm_i_or,s_or); | |
1cc91f1b | 574 | |
0f2d19dd JB |
575 | SCM |
576 | scm_m_or (xorig, env) | |
577 | SCM xorig; | |
578 | SCM env; | |
0f2d19dd JB |
579 | { |
580 | int len = scm_ilength (SCM_CDR (xorig)); | |
b8229a3b | 581 | SCM_ASSYNT (len >= 0, xorig, scm_s_test, s_or); |
0f2d19dd JB |
582 | if (len >= 1) |
583 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); | |
584 | else | |
585 | return SCM_BOOL_F; | |
586 | } | |
587 | ||
588 | ||
b8229a3b MS |
589 | SCM_SYNTAX(s_case, "case", scm_makmmacro, scm_m_case); |
590 | SCM_SYMBOL(scm_i_case, s_case); | |
1cc91f1b | 591 | |
0f2d19dd JB |
592 | SCM |
593 | scm_m_case (xorig, env) | |
594 | SCM xorig; | |
595 | SCM env; | |
0f2d19dd JB |
596 | { |
597 | SCM proc, x = SCM_CDR (xorig); | |
b8229a3b | 598 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_clauses, s_case); |
0f2d19dd JB |
599 | while (SCM_NIMP (x = SCM_CDR (x))) |
600 | { | |
601 | proc = SCM_CAR (x); | |
b8229a3b | 602 | SCM_ASSYNT (scm_ilength (proc) >= 2, xorig, scm_s_clauses, s_case); |
6cb702da MD |
603 | SCM_ASSYNT (scm_ilength (SCM_CAR (proc)) >= 0 |
604 | || scm_i_else == SCM_CAR (proc), | |
b8229a3b | 605 | xorig, scm_s_clauses, s_case); |
0f2d19dd JB |
606 | } |
607 | return scm_cons (SCM_IM_CASE, SCM_CDR (xorig)); | |
608 | } | |
609 | ||
610 | ||
b8229a3b MS |
611 | SCM_SYNTAX(s_cond, "cond", scm_makmmacro, scm_m_cond); |
612 | SCM_SYMBOL(scm_i_cond, s_cond); | |
613 | ||
1cc91f1b | 614 | |
0f2d19dd JB |
615 | SCM |
616 | scm_m_cond (xorig, env) | |
617 | SCM xorig; | |
618 | SCM env; | |
0f2d19dd JB |
619 | { |
620 | SCM arg1, x = SCM_CDR (xorig); | |
621 | int len = scm_ilength (x); | |
b8229a3b | 622 | SCM_ASSYNT (len >= 1, xorig, scm_s_clauses, s_cond); |
0f2d19dd JB |
623 | while (SCM_NIMP (x)) |
624 | { | |
625 | arg1 = SCM_CAR (x); | |
626 | len = scm_ilength (arg1); | |
b8229a3b | 627 | SCM_ASSYNT (len >= 1, xorig, scm_s_clauses, s_cond); |
0f2d19dd JB |
628 | if (scm_i_else == SCM_CAR (arg1)) |
629 | { | |
6cb702da | 630 | SCM_ASSYNT (SCM_NULLP (SCM_CDR (x)) && len >= 2, |
b8229a3b | 631 | xorig, "bad ELSE clause", s_cond); |
a23afe53 | 632 | SCM_SETCAR (arg1, SCM_BOOL_T); |
0f2d19dd JB |
633 | } |
634 | if (len >= 2 && scm_i_arrow == SCM_CAR (SCM_CDR (arg1))) | |
6cb702da | 635 | SCM_ASSYNT (3 == len && SCM_NIMP (SCM_CAR (SCM_CDR (SCM_CDR (arg1)))), |
b8229a3b | 636 | xorig, "bad recipient", s_cond); |
0f2d19dd JB |
637 | x = SCM_CDR (x); |
638 | } | |
639 | return scm_cons (SCM_IM_COND, SCM_CDR (xorig)); | |
640 | } | |
641 | ||
b8229a3b MS |
642 | SCM_SYNTAX(s_lambda, "lambda", scm_makmmacro, scm_m_lambda); |
643 | SCM_GLOBAL_SYMBOL(scm_i_lambda, s_lambda); | |
1cc91f1b | 644 | |
0f2d19dd JB |
645 | SCM |
646 | scm_m_lambda (xorig, env) | |
647 | SCM xorig; | |
648 | SCM env; | |
0f2d19dd JB |
649 | { |
650 | SCM proc, x = SCM_CDR (xorig); | |
651 | if (scm_ilength (x) < 2) | |
652 | goto badforms; | |
653 | proc = SCM_CAR (x); | |
33b97402 MD |
654 | if (SCM_NULLP (proc)) |
655 | goto memlambda; | |
656 | if (SCM_IMP (proc)) | |
657 | goto badforms; | |
658 | if (SCM_SYMBOLP (proc)) | |
659 | goto memlambda; | |
660 | if (SCM_NCONSP (proc)) | |
661 | goto badforms; | |
662 | while (SCM_NIMP (proc)) | |
0f2d19dd | 663 | { |
33b97402 MD |
664 | if (SCM_NCONSP (proc)) |
665 | { | |
0f2d19dd | 666 | if (!SCM_SYMBOLP (proc)) |
33b97402 MD |
667 | goto badforms; |
668 | else | |
669 | goto memlambda; | |
670 | } | |
0f2d19dd JB |
671 | if (!(SCM_NIMP (SCM_CAR (proc)) && SCM_SYMBOLP (SCM_CAR (proc)))) |
672 | goto badforms; | |
673 | proc = SCM_CDR (proc); | |
674 | } | |
675 | if SCM_NNULLP | |
676 | (proc) | |
6cb702da | 677 | badforms:scm_wta (xorig, scm_s_formals, "lambda"); |
0f2d19dd | 678 | memlambda: |
a23afe53 | 679 | bodycheck (xorig, SCM_CDRLOC (x), "lambda"); |
0f2d19dd JB |
680 | return scm_cons (SCM_IM_LAMBDA, SCM_CDR (xorig)); |
681 | } | |
682 | ||
b8229a3b MS |
683 | SCM_SYNTAX(s_letstar,"let*", scm_makmmacro, scm_m_letstar); |
684 | SCM_SYMBOL(scm_i_letstar,s_letstar); | |
0f2d19dd | 685 | |
1cc91f1b | 686 | |
0f2d19dd JB |
687 | SCM |
688 | scm_m_letstar (xorig, env) | |
689 | SCM xorig; | |
690 | SCM env; | |
0f2d19dd JB |
691 | { |
692 | SCM x = SCM_CDR (xorig), arg1, proc, vars = SCM_EOL, *varloc = &vars; | |
693 | int len = scm_ilength (x); | |
b8229a3b | 694 | SCM_ASSYNT (len >= 2, xorig, scm_s_body, s_letstar); |
0f2d19dd | 695 | proc = SCM_CAR (x); |
b8229a3b | 696 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, s_letstar); |
6dbd0af5 | 697 | while SCM_NIMP (proc) |
0f2d19dd JB |
698 | { |
699 | arg1 = SCM_CAR (proc); | |
b8229a3b | 700 | SCM_ASSYNT (2 == scm_ilength (arg1), xorig, scm_s_bindings, s_letstar); |
6cb702da | 701 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), |
b8229a3b | 702 | xorig, scm_s_variable, s_letstar); |
0f2d19dd | 703 | *varloc = scm_cons2 (SCM_CAR (arg1), SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 704 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
0f2d19dd JB |
705 | proc = SCM_CDR (proc); |
706 | } | |
707 | x = scm_cons (vars, SCM_CDR (x)); | |
b8229a3b | 708 | bodycheck (xorig, SCM_CDRLOC (x), s_letstar); |
0f2d19dd JB |
709 | return scm_cons (SCM_IM_LETSTAR, x); |
710 | } | |
711 | ||
712 | /* DO gets the most radically altered syntax | |
713 | (do ((<var1> <init1> <step1>) | |
714 | (<var2> <init2>) | |
715 | ... ) | |
716 | (<test> <return>) | |
717 | <body>) | |
718 | ;; becomes | |
719 | (do_mem (varn ... var2 var1) | |
720 | (<init1> <init2> ... <initn>) | |
721 | (<test> <return>) | |
722 | (<body>) | |
723 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
724 | */ | |
725 | ||
b8229a3b MS |
726 | SCM_SYNTAX(s_do, "do", scm_makmmacro, scm_m_do); |
727 | SCM_SYMBOL(scm_i_do, s_do); | |
1cc91f1b | 728 | |
0f2d19dd JB |
729 | SCM |
730 | scm_m_do (xorig, env) | |
731 | SCM xorig; | |
732 | SCM env; | |
0f2d19dd JB |
733 | { |
734 | SCM x = SCM_CDR (xorig), arg1, proc; | |
735 | SCM vars = SCM_EOL, inits = SCM_EOL, steps = SCM_EOL; | |
736 | SCM *initloc = &inits, *steploc = &steps; | |
737 | int len = scm_ilength (x); | |
6cb702da | 738 | SCM_ASSYNT (len >= 2, xorig, scm_s_test, "do"); |
0f2d19dd | 739 | proc = SCM_CAR (x); |
6cb702da | 740 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, "do"); |
0f2d19dd JB |
741 | while SCM_NIMP |
742 | (proc) | |
743 | { | |
744 | arg1 = SCM_CAR (proc); | |
745 | len = scm_ilength (arg1); | |
6cb702da MD |
746 | SCM_ASSYNT (2 == len || 3 == len, xorig, scm_s_bindings, "do"); |
747 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), | |
748 | xorig, scm_s_variable, "do"); | |
0f2d19dd JB |
749 | /* vars reversed here, inits and steps reversed at evaluation */ |
750 | vars = scm_cons (SCM_CAR (arg1), vars); /* variable */ | |
751 | arg1 = SCM_CDR (arg1); | |
752 | *initloc = scm_cons (SCM_CAR (arg1), SCM_EOL); /* init */ | |
a23afe53 | 753 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
754 | arg1 = SCM_CDR (arg1); |
755 | *steploc = scm_cons (SCM_IMP (arg1) ? SCM_CAR (vars) : SCM_CAR (arg1), SCM_EOL); /* step */ | |
a23afe53 | 756 | steploc = SCM_CDRLOC (*steploc); |
0f2d19dd JB |
757 | proc = SCM_CDR (proc); |
758 | } | |
759 | x = SCM_CDR (x); | |
6cb702da | 760 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, xorig, scm_s_test, "do"); |
0f2d19dd JB |
761 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
762 | x = scm_cons2 (vars, inits, x); | |
a23afe53 | 763 | bodycheck (xorig, SCM_CARLOC (SCM_CDR (SCM_CDR (x))), "do"); |
0f2d19dd JB |
764 | return scm_cons (SCM_IM_DO, x); |
765 | } | |
766 | ||
6dbd0af5 MD |
767 | /* evalcar is small version of inline EVALCAR when we don't care about |
768 | * speed | |
769 | */ | |
770 | #define evalcar scm_eval_car | |
0f2d19dd | 771 | |
1cc91f1b JB |
772 | |
773 | static SCM iqq SCM_P ((SCM form, SCM env, int depth)); | |
774 | ||
b8229a3b MS |
775 | SCM_SYNTAX(s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
776 | SCM_GLOBAL_SYMBOL(scm_i_quasiquote, s_quasiquote); | |
777 | ||
778 | SCM | |
779 | scm_m_quasiquote (xorig, env) | |
780 | SCM xorig; | |
781 | SCM env; | |
782 | { | |
783 | SCM x = SCM_CDR (xorig); | |
784 | SCM_ASSYNT (scm_ilength (x) == 1, xorig, scm_s_expression, s_quasiquote); | |
785 | return iqq (SCM_CAR (x), env, 1); | |
786 | } | |
787 | ||
788 | ||
0f2d19dd JB |
789 | static SCM |
790 | iqq (form, env, depth) | |
791 | SCM form; | |
792 | SCM env; | |
793 | int depth; | |
0f2d19dd JB |
794 | { |
795 | SCM tmp; | |
796 | int edepth = depth; | |
797 | if SCM_IMP | |
798 | (form) return form; | |
799 | if (SCM_VECTORP (form)) | |
800 | { | |
801 | long i = SCM_LENGTH (form); | |
802 | SCM *data = SCM_VELTS (form); | |
803 | tmp = SCM_EOL; | |
804 | for (; --i >= 0;) | |
805 | tmp = scm_cons (data[i], tmp); | |
806 | return scm_vector (iqq (tmp, env, depth)); | |
807 | } | |
808 | if SCM_NCONSP | |
809 | (form) return form; | |
810 | tmp = SCM_CAR (form); | |
811 | if (scm_i_quasiquote == tmp) | |
812 | { | |
813 | depth++; | |
814 | goto label; | |
815 | } | |
816 | if (scm_i_unquote == tmp) | |
817 | { | |
818 | --depth; | |
819 | label: | |
820 | form = SCM_CDR (form); | |
0f2d19dd JB |
821 | SCM_ASSERT (SCM_NIMP (form) && SCM_ECONSP (form) && SCM_NULLP (SCM_CDR (form)), |
822 | form, SCM_ARG1, s_quasiquote); | |
823 | if (0 == depth) | |
824 | return evalcar (form, env); | |
825 | return scm_cons2 (tmp, iqq (SCM_CAR (form), env, depth), SCM_EOL); | |
826 | } | |
827 | if (SCM_NIMP (tmp) && (scm_i_uq_splicing == SCM_CAR (tmp))) | |
828 | { | |
829 | tmp = SCM_CDR (tmp); | |
830 | if (0 == --edepth) | |
831 | return scm_append (scm_cons2 (evalcar (tmp, env), iqq (SCM_CDR (form), env, depth), SCM_EOL)); | |
832 | } | |
833 | return scm_cons (iqq (SCM_CAR (form), env, edepth), iqq (SCM_CDR (form), env, depth)); | |
834 | } | |
835 | ||
836 | /* Here are acros which return values rather than code. */ | |
837 | ||
b8229a3b | 838 | SCM_SYNTAX(s_delay, "delay", scm_makacro, scm_m_delay); |
1cc91f1b | 839 | |
0f2d19dd JB |
840 | SCM |
841 | scm_m_delay (xorig, env) | |
842 | SCM xorig; | |
843 | SCM env; | |
0f2d19dd | 844 | { |
6cb702da | 845 | SCM_ASSYNT (scm_ilength (xorig) == 2, xorig, scm_s_expression, s_delay); |
0f2d19dd JB |
846 | xorig = SCM_CDR (xorig); |
847 | return scm_makprom (scm_closure (scm_cons2 (SCM_EOL, SCM_CAR (xorig), SCM_CDR (xorig)), | |
848 | env)); | |
849 | } | |
850 | ||
1cc91f1b | 851 | |
6cb702da MD |
852 | SCM |
853 | scm_env_top_level (env) | |
0f2d19dd | 854 | SCM env; |
0f2d19dd JB |
855 | { |
856 | while (SCM_NIMP(env)) | |
857 | { | |
858 | if (SCM_BOOL_T == scm_procedure_p (SCM_CAR(env))) | |
859 | return SCM_CAR(env); | |
860 | env = SCM_CDR (env); | |
861 | } | |
862 | return SCM_BOOL_F; | |
863 | } | |
864 | ||
b8229a3b MS |
865 | SCM_SYNTAX(s_define, "define", scm_makmmacro, scm_m_define); |
866 | SCM_SYMBOL(scm_i_define, s_define); | |
1cc91f1b | 867 | |
0f2d19dd JB |
868 | SCM |
869 | scm_m_define (x, env) | |
870 | SCM x; | |
871 | SCM env; | |
0f2d19dd JB |
872 | { |
873 | SCM proc, arg1 = x; | |
874 | x = SCM_CDR (x); | |
6cb702da | 875 | /* SCM_ASSYNT(SCM_NULLP(env), x, "bad placement", s_define);*/ |
b8229a3b | 876 | SCM_ASSYNT (scm_ilength (x) >= 2, arg1, scm_s_expression, s_define); |
0f2d19dd JB |
877 | proc = SCM_CAR (x); |
878 | x = SCM_CDR (x); | |
879 | while (SCM_NIMP (proc) && SCM_CONSP (proc)) | |
880 | { /* nested define syntax */ | |
881 | x = scm_cons (scm_cons2 (scm_i_lambda, SCM_CDR (proc), x), SCM_EOL); | |
882 | proc = SCM_CAR (proc); | |
883 | } | |
6cb702da | 884 | SCM_ASSYNT (SCM_NIMP (proc) && SCM_SYMBOLP (proc), |
b8229a3b MS |
885 | arg1, scm_s_variable, s_define); |
886 | SCM_ASSYNT (1 == scm_ilength (x), arg1, scm_s_expression, s_define); | |
0f2d19dd JB |
887 | if (SCM_TOP_LEVEL (env)) |
888 | { | |
889 | x = evalcar (x, env); | |
6dbd0af5 | 890 | #ifdef DEBUG_EXTENSIONS |
80ea260c MD |
891 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x)) |
892 | { | |
893 | arg1 = x; | |
894 | proc: | |
895 | if (SCM_CLOSUREP (arg1) | |
896 | /* Only the first definition determines the name. */ | |
897 | && scm_procedure_property (arg1, scm_i_name) == SCM_BOOL_F) | |
898 | scm_set_procedure_property_x (arg1, scm_i_name, proc); | |
899 | else if (SCM_TYP16 (arg1) == scm_tc16_macro | |
900 | && SCM_CDR (arg1) != arg1) | |
901 | { | |
902 | arg1 = SCM_CDR (arg1); | |
903 | goto proc; | |
904 | } | |
905 | } | |
6dbd0af5 | 906 | #endif |
6cb702da | 907 | arg1 = scm_sym2vcell (proc, scm_env_top_level (env), SCM_BOOL_T); |
0f2d19dd | 908 | #if 0 |
cf7c17e9 | 909 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
910 | if (SCM_NIMP (SCM_CDR (arg1)) && ((SCM) SCM_SNAME (SCM_CDR (arg1)) == proc) |
911 | && (SCM_CDR (arg1) != x)) | |
912 | scm_warn ("redefining built-in ", SCM_CHARS (proc)); | |
913 | else | |
914 | #endif | |
915 | if (5 <= scm_verbose && SCM_UNDEFINED != SCM_CDR (arg1)) | |
916 | scm_warn ("redefining ", SCM_CHARS (proc)); | |
0f2d19dd | 917 | #endif |
a23afe53 | 918 | SCM_SETCDR (arg1, x); |
0f2d19dd JB |
919 | #ifdef SICP |
920 | return scm_cons2 (scm_i_quote, SCM_CAR (arg1), SCM_EOL); | |
921 | #else | |
922 | return SCM_UNSPECIFIED; | |
923 | #endif | |
924 | } | |
925 | return scm_cons2 (SCM_IM_DEFINE, proc, x); | |
926 | } | |
6dbd0af5 | 927 | |
0f2d19dd JB |
928 | /* end of acros */ |
929 | ||
b8229a3b MS |
930 | SCM_SYNTAX(s_letrec, "letrec", scm_makmmacro, scm_m_letrec); |
931 | SCM_SYMBOL(scm_i_letrec, s_letrec); | |
1cc91f1b | 932 | |
0f2d19dd JB |
933 | SCM |
934 | scm_m_letrec (xorig, env) | |
935 | SCM xorig; | |
936 | SCM env; | |
0f2d19dd JB |
937 | { |
938 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
939 | char *what = SCM_CHARS (SCM_CAR (xorig)); | |
940 | SCM x = cdrx, proc, arg1; /* structure traversers */ | |
941 | SCM vars = SCM_EOL, inits = SCM_EOL, *initloc = &inits; | |
942 | ||
6cb702da | 943 | ASRTSYNTAX (scm_ilength (x) >= 2, scm_s_body); |
0f2d19dd JB |
944 | proc = SCM_CAR (x); |
945 | if SCM_NULLP | |
946 | (proc) return scm_m_letstar (xorig, env); /* null binding, let* faster */ | |
6cb702da | 947 | ASRTSYNTAX (scm_ilength (proc) >= 1, scm_s_bindings); |
0f2d19dd JB |
948 | do |
949 | { | |
950 | /* vars scm_list reversed here, inits reversed at evaluation */ | |
951 | arg1 = SCM_CAR (proc); | |
6cb702da MD |
952 | ASRTSYNTAX (2 == scm_ilength (arg1), scm_s_bindings); |
953 | ASRTSYNTAX (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable); | |
0f2d19dd JB |
954 | vars = scm_cons (SCM_CAR (arg1), vars); |
955 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); | |
a23afe53 | 956 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
957 | } |
958 | while SCM_NIMP | |
959 | (proc = SCM_CDR (proc)); | |
960 | cdrx = scm_cons2 (vars, inits, SCM_CDR (x)); | |
a23afe53 | 961 | bodycheck (xorig, SCM_CDRLOC (SCM_CDR (cdrx)), what); |
0f2d19dd JB |
962 | return scm_cons (SCM_IM_LETREC, cdrx); |
963 | } | |
964 | ||
1cc91f1b | 965 | |
b8229a3b MS |
966 | SCM_SYNTAX(s_let, "let", scm_makmmacro, scm_m_let); |
967 | SCM_SYMBOL(scm_i_let, s_let); | |
968 | ||
0f2d19dd JB |
969 | SCM |
970 | scm_m_let (xorig, env) | |
971 | SCM xorig; | |
972 | SCM env; | |
0f2d19dd JB |
973 | { |
974 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
975 | SCM x = cdrx, proc, arg1, name; /* structure traversers */ | |
976 | SCM vars = SCM_EOL, inits = SCM_EOL, *varloc = &vars, *initloc = &inits; | |
977 | ||
b8229a3b | 978 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, s_let); |
0f2d19dd JB |
979 | proc = SCM_CAR (x); |
980 | if (SCM_NULLP (proc) | |
981 | || (SCM_NIMP (proc) && SCM_CONSP (proc) | |
982 | && SCM_NIMP (SCM_CAR (proc)) && SCM_CONSP (SCM_CAR (proc)) && SCM_NULLP (SCM_CDR (proc)))) | |
983 | return scm_m_letstar (xorig, env); /* null or single binding, let* is faster */ | |
b8229a3b | 984 | SCM_ASSYNT (SCM_NIMP (proc), xorig, scm_s_bindings, s_let); |
0f2d19dd JB |
985 | if (SCM_CONSP (proc)) /* plain let, proc is <bindings> */ |
986 | return scm_cons (SCM_IM_LET, SCM_CDR (scm_m_letrec (xorig, env))); | |
987 | if (!SCM_SYMBOLP (proc)) | |
b8229a3b | 988 | scm_wta (xorig, scm_s_bindings, s_let); /* bad let */ |
0f2d19dd JB |
989 | name = proc; /* named let, build equiv letrec */ |
990 | x = SCM_CDR (x); | |
b8229a3b | 991 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, s_let); |
0f2d19dd | 992 | proc = SCM_CAR (x); /* bindings scm_list */ |
b8229a3b | 993 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, s_let); |
0f2d19dd JB |
994 | while SCM_NIMP |
995 | (proc) | |
996 | { /* vars and inits both in order */ | |
997 | arg1 = SCM_CAR (proc); | |
b8229a3b | 998 | SCM_ASSYNT (2 == scm_ilength (arg1), xorig, scm_s_bindings, s_let); |
6cb702da | 999 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), |
b8229a3b | 1000 | xorig, scm_s_variable, s_let); |
0f2d19dd | 1001 | *varloc = scm_cons (SCM_CAR (arg1), SCM_EOL); |
a23afe53 | 1002 | varloc = SCM_CDRLOC (*varloc); |
0f2d19dd | 1003 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 1004 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
1005 | proc = SCM_CDR (proc); |
1006 | } | |
1007 | return | |
1008 | scm_m_letrec (scm_cons2 (scm_i_let, | |
1009 | scm_cons (scm_cons2 (name, scm_cons2 (scm_i_lambda, vars, SCM_CDR (x)), SCM_EOL), SCM_EOL), | |
1010 | scm_acons (name, inits, SCM_EOL)), /* body */ | |
1011 | env); | |
1012 | } | |
1013 | ||
1014 | ||
b8229a3b MS |
1015 | SCM_SYNTAX(s_atapply,"@apply", scm_makmmacro, scm_m_apply); |
1016 | SCM_SYMBOL(scm_i_atapply, s_atapply); | |
1cc91f1b | 1017 | |
0f2d19dd JB |
1018 | SCM |
1019 | scm_m_apply (xorig, env) | |
1020 | SCM xorig; | |
1021 | SCM env; | |
0f2d19dd | 1022 | { |
6cb702da | 1023 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, |
b8229a3b | 1024 | xorig, scm_s_expression, s_atapply); |
0f2d19dd JB |
1025 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
1026 | } | |
1027 | ||
b8229a3b MS |
1028 | |
1029 | SCM_SYNTAX(s_atcall_cc,"@call-with-current-continuation", scm_makmmacro, scm_m_cont); | |
1030 | SCM_SYMBOL(scm_i_atcall_cc,s_atcall_cc); | |
0f2d19dd | 1031 | |
1cc91f1b | 1032 | |
0f2d19dd JB |
1033 | SCM |
1034 | scm_m_cont (xorig, env) | |
1035 | SCM xorig; | |
1036 | SCM env; | |
0f2d19dd | 1037 | { |
6cb702da | 1038 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
b8229a3b | 1039 | xorig, scm_s_expression, s_atcall_cc); |
0f2d19dd JB |
1040 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
1041 | } | |
1042 | ||
6dbd0af5 MD |
1043 | /* scm_unmemocopy takes a memoized expression together with its |
1044 | * environment and rewrites it to its original form. Thus, it is the | |
1045 | * inversion of the rewrite rules above. The procedure is not | |
1046 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1047 | * code of a closure, in scm_procedure_source, in display_frame when |
1048 | * generating the source for a stackframe in a backtrace, and in | |
1049 | * display_expression. | |
6dbd0af5 MD |
1050 | */ |
1051 | ||
1cc91f1b JB |
1052 | static SCM unmemocopy SCM_P ((SCM x, SCM env)); |
1053 | ||
6dbd0af5 MD |
1054 | static SCM |
1055 | unmemocopy (x, env) | |
1056 | SCM x; | |
1057 | SCM env; | |
6dbd0af5 MD |
1058 | { |
1059 | SCM ls, z; | |
1060 | #ifdef DEBUG_EXTENSIONS | |
1061 | SCM p; | |
1062 | #endif | |
1063 | if (SCM_NCELLP (x) || SCM_NECONSP (x)) | |
1064 | return x; | |
1065 | #ifdef DEBUG_EXTENSIONS | |
1066 | p = scm_whash_lookup (scm_source_whash, x); | |
1067 | #endif | |
1068 | switch (SCM_TYP7 (x)) | |
1069 | { | |
1070 | case (127 & SCM_IM_AND): | |
1071 | ls = z = scm_cons (scm_i_and, SCM_UNSPECIFIED); | |
1072 | break; | |
1073 | case (127 & SCM_IM_BEGIN): | |
1074 | ls = z = scm_cons (scm_i_begin, SCM_UNSPECIFIED); | |
1075 | break; | |
1076 | case (127 & SCM_IM_CASE): | |
1077 | ls = z = scm_cons (scm_i_case, SCM_UNSPECIFIED); | |
1078 | break; | |
1079 | case (127 & SCM_IM_COND): | |
1080 | ls = z = scm_cons (scm_i_cond, SCM_UNSPECIFIED); | |
1081 | break; | |
1082 | case (127 & SCM_IM_DO): | |
1083 | ls = scm_cons (scm_i_do, SCM_UNSPECIFIED); | |
1084 | goto transform; | |
1085 | case (127 & SCM_IM_IF): | |
1086 | ls = z = scm_cons (scm_i_if, SCM_UNSPECIFIED); | |
1087 | break; | |
1088 | case (127 & SCM_IM_LET): | |
1089 | ls = scm_cons (scm_i_let, SCM_UNSPECIFIED); | |
1090 | goto transform; | |
1091 | case (127 & SCM_IM_LETREC): | |
1092 | { | |
1093 | SCM f, v, e, s; | |
1094 | ls = scm_cons (scm_i_letrec, SCM_UNSPECIFIED); | |
1095 | transform: | |
1096 | x = SCM_CDR (x); | |
1097 | f = v = SCM_CAR (x); | |
1098 | x = SCM_CDR (x); | |
e2806c10 | 1099 | z = EXTEND_ENV (f, SCM_EOL, env); |
6dbd0af5 MD |
1100 | e = scm_reverse (unmemocopy (SCM_CAR (x), |
1101 | SCM_CAR (ls) == scm_i_letrec ? z : env)); | |
1102 | env = z; | |
1103 | s = SCM_CAR (ls) == scm_i_do | |
1104 | ? scm_reverse (unmemocopy (SCM_CDR (SCM_CDR (SCM_CDR (x))), env)) | |
1105 | : f; | |
1106 | z = SCM_EOL; | |
1107 | do | |
1108 | { | |
1109 | z = scm_acons (SCM_CAR (v), | |
1110 | scm_cons (SCM_CAR (e), | |
1111 | SCM_CAR (s) == SCM_CAR (v) | |
1112 | ? SCM_EOL | |
1113 | : scm_cons (SCM_CAR (s), SCM_EOL)), | |
1114 | z); | |
1115 | v = SCM_CDR (v); | |
1116 | e = SCM_CDR (e); | |
1117 | s = SCM_CDR (s); | |
1118 | } | |
1119 | while SCM_NIMP (v); | |
a23afe53 MD |
1120 | z = scm_cons (z, SCM_UNSPECIFIED); |
1121 | SCM_SETCDR (ls, z); | |
6dbd0af5 MD |
1122 | if (SCM_CAR (ls) == scm_i_do) |
1123 | { | |
1124 | x = SCM_CDR (x); | |
a23afe53 | 1125 | SCM_SETCDR (z, scm_cons (unmemocopy (SCM_CAR (x), env), |
6dbd0af5 | 1126 | SCM_UNSPECIFIED)); |
a23afe53 MD |
1127 | z = SCM_CDR (z); |
1128 | x = (SCM) (SCM_CARLOC (SCM_CDR (x)) - 1); | |
6dbd0af5 MD |
1129 | } |
1130 | break; | |
1131 | } | |
1132 | case (127 & SCM_IM_LETSTAR): | |
1133 | { | |
1134 | SCM b, y; | |
1135 | x = SCM_CDR (x); | |
1136 | b = SCM_CAR (x); | |
1137 | y = SCM_EOL; | |
1138 | if SCM_IMP (b) | |
1139 | { | |
e2806c10 | 1140 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1141 | goto letstar; |
1142 | } | |
1143 | y = z = scm_acons (SCM_CAR (b), | |
1144 | unmemocar ( | |
1145 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), | |
1146 | SCM_UNSPECIFIED); | |
e2806c10 | 1147 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1148 | b = SCM_CDR (SCM_CDR (b)); |
1149 | if (SCM_IMP (b)) | |
1150 | { | |
1151 | SCM_SETCDR (y, SCM_EOL); | |
1152 | ls = scm_cons (scm_i_let, z = scm_cons (y, SCM_UNSPECIFIED)); | |
1153 | break; | |
1154 | } | |
1155 | do | |
1156 | { | |
a23afe53 MD |
1157 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1158 | unmemocar ( | |
6dbd0af5 | 1159 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), |
a23afe53 MD |
1160 | SCM_UNSPECIFIED)); |
1161 | z = SCM_CDR (z); | |
e2806c10 | 1162 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1163 | b = SCM_CDR (SCM_CDR (b)); |
1164 | } | |
1165 | while SCM_NIMP (b); | |
a23afe53 | 1166 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 MD |
1167 | letstar: |
1168 | ls = scm_cons (scm_i_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); | |
1169 | break; | |
1170 | } | |
1171 | case (127 & SCM_IM_OR): | |
1172 | ls = z = scm_cons (scm_i_or, SCM_UNSPECIFIED); | |
1173 | break; | |
1174 | case (127 & SCM_IM_LAMBDA): | |
1175 | x = SCM_CDR (x); | |
1176 | ls = scm_cons (scm_i_lambda, | |
1177 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED)); | |
e2806c10 | 1178 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 MD |
1179 | break; |
1180 | case (127 & SCM_IM_QUOTE): | |
1181 | ls = z = scm_cons (scm_i_quote, SCM_UNSPECIFIED); | |
1182 | break; | |
1183 | case (127 & SCM_IM_SET): | |
1184 | ls = z = scm_cons (scm_i_set, SCM_UNSPECIFIED); | |
1185 | break; | |
1186 | case (127 & SCM_IM_DEFINE): | |
1187 | { | |
1188 | SCM n; | |
1189 | x = SCM_CDR (x); | |
1190 | ls = scm_cons (scm_i_define, | |
1191 | z = scm_cons (n = SCM_CAR (x), SCM_UNSPECIFIED)); | |
1192 | if (SCM_NNULLP (env)) | |
a23afe53 | 1193 | SCM_SETCAR (SCM_CAR (env), scm_cons (n, SCM_CAR (SCM_CAR (env)))); |
6dbd0af5 MD |
1194 | break; |
1195 | } | |
1196 | case (127 & SCM_MAKISYM (0)): | |
1197 | z = SCM_CAR (x); | |
1198 | if (!SCM_ISYMP (z)) | |
1199 | goto unmemo; | |
1200 | switch SCM_ISYMNUM (z) | |
1201 | { | |
1202 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
1203 | ls = z = scm_cons (scm_i_atapply, SCM_UNSPECIFIED); | |
1204 | goto loop; | |
1205 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
1206 | ls = z = scm_cons (scm_i_atcall_cc, SCM_UNSPECIFIED); | |
1207 | goto loop; | |
1208 | default: | |
fa888178 | 1209 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1210 | } |
1211 | unmemo: | |
1212 | default: | |
1213 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1214 | SCM_UNSPECIFIED), | |
1215 | env); | |
1216 | } | |
1217 | loop: | |
1218 | while (SCM_CELLP (x = SCM_CDR (x)) && SCM_ECONSP (x)) | |
a23afe53 MD |
1219 | { |
1220 | SCM_SETCDR (z, unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1221 | SCM_UNSPECIFIED), | |
1222 | env)); | |
1223 | z = SCM_CDR (z); | |
1224 | } | |
1225 | SCM_SETCDR (z, x); | |
6dbd0af5 MD |
1226 | #ifdef DEBUG_EXTENSIONS |
1227 | if (SCM_NFALSEP (p)) | |
1228 | scm_whash_insert (scm_source_whash, ls, p); | |
1229 | #endif | |
1230 | return ls; | |
1231 | } | |
1232 | ||
1cc91f1b | 1233 | |
6dbd0af5 MD |
1234 | SCM |
1235 | scm_unmemocopy (x, env) | |
1236 | SCM x; | |
1237 | SCM env; | |
6dbd0af5 MD |
1238 | { |
1239 | if (SCM_NNULLP (env)) | |
1240 | /* Make a copy of the lowest frame to protect it from | |
1241 | modifications by SCM_IM_DEFINE */ | |
1242 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1243 | else | |
1244 | return unmemocopy (x, env); | |
1245 | } | |
1246 | ||
cf7c17e9 | 1247 | #ifndef SCM_RECKLESS |
1cc91f1b | 1248 | |
0f2d19dd JB |
1249 | int |
1250 | scm_badargsp (formals, args) | |
1251 | SCM formals; | |
1252 | SCM args; | |
0f2d19dd JB |
1253 | { |
1254 | while SCM_NIMP | |
1255 | (formals) | |
1256 | { | |
1257 | if SCM_NCONSP | |
1258 | (formals) return 0; | |
1259 | if SCM_IMP | |
1260 | (args) return 1; | |
1261 | formals = SCM_CDR (formals); | |
1262 | args = SCM_CDR (args); | |
1263 | } | |
1264 | return SCM_NNULLP (args) ? 1 : 0; | |
1265 | } | |
1266 | #endif | |
1267 | ||
1268 | ||
1269 | \f | |
6dbd0af5 | 1270 | SCM |
680ed4a8 | 1271 | scm_eval_args (l, env, proc) |
6dbd0af5 MD |
1272 | SCM l; |
1273 | SCM env; | |
680ed4a8 | 1274 | SCM proc; |
6dbd0af5 | 1275 | { |
680ed4a8 | 1276 | SCM results = SCM_EOL, *lloc = &results, res; |
6dbd0af5 MD |
1277 | while (SCM_NIMP (l)) |
1278 | { | |
cf7c17e9 | 1279 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1280 | if (SCM_IMP (l)) |
1281 | goto wrongnumargs; | |
1282 | else if (SCM_CONSP (l)) | |
1283 | { | |
1284 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1285 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1286 | else |
1287 | res = EVALCELLCAR (l, env); | |
1288 | } | |
1289 | else if (SCM_TYP3 (l) == 1) | |
1290 | { | |
1291 | if ((res = SCM_GLOC_VAL (SCM_CAR (l))) == 0) | |
1292 | res = SCM_CAR (l); /* struct planted in code */ | |
1293 | } | |
1294 | else | |
1295 | goto wrongnumargs; | |
1296 | #else | |
1297 | res = EVALCAR (l, env); | |
1298 | #endif | |
1299 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1300 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1301 | l = SCM_CDR (l); |
1302 | } | |
cf7c17e9 | 1303 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1304 | if (SCM_NNULLP (l)) |
1305 | { | |
1306 | wrongnumargs: | |
1307 | scm_wrong_num_args (proc); | |
1308 | } | |
1309 | #endif | |
1310 | return results; | |
6dbd0af5 | 1311 | } |
c4ac4d88 JB |
1312 | |
1313 | ||
0f2d19dd JB |
1314 | #endif /* !DEVAL */ |
1315 | ||
6dbd0af5 MD |
1316 | |
1317 | /* SECTION: This code is specific for the debugging support. One | |
1318 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1319 | * defined. | |
1320 | */ | |
1321 | ||
1322 | #ifndef DEVAL | |
1323 | ||
1324 | #define SCM_APPLY scm_apply | |
1325 | #define PREP_APPLY(proc, args) | |
1326 | #define ENTER_APPLY | |
1327 | #define RETURN(x) return x; | |
b7ff98dd MD |
1328 | #ifdef STACK_CHECKING |
1329 | #ifndef NO_CEVAL_STACK_CHECKING | |
1330 | #define EVAL_STACK_CHECKING | |
1331 | #endif | |
6dbd0af5 MD |
1332 | #endif |
1333 | ||
1334 | #else /* !DEVAL */ | |
1335 | ||
0f2d19dd JB |
1336 | #undef SCM_CEVAL |
1337 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1338 | #undef SCM_APPLY | |
1339 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1340 | #undef PREP_APPLY |
1341 | #define PREP_APPLY(p, l) \ | |
1342 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1343 | #undef ENTER_APPLY | |
1344 | #define ENTER_APPLY \ | |
1345 | {\ | |
b7ff98dd | 1346 | SCM_SET_ARGSREADY (debug);\ |
b6d75948 | 1347 | if (CHECK_APPLY && SCM_TRAPS_P)\ |
b7ff98dd | 1348 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1349 | {\ |
b7ff98dd | 1350 | SCM tmp, tail = SCM_TRACED_FRAME_P (debug) ? SCM_BOOL_T : SCM_BOOL_F;\ |
c6a4fbce | 1351 | SCM_SET_TRACED_FRAME (debug); \ |
b7ff98dd | 1352 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1353 | {\ |
c0ab1b8d | 1354 | tmp = scm_make_debugobj (&debug);\ |
6dbd0af5 | 1355 | scm_ithrow (scm_i_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
b6d75948 | 1356 | }\ |
6dbd0af5 MD |
1357 | else\ |
1358 | {\ | |
1359 | scm_make_cont (&tmp);\ | |
ca6ef71a | 1360 | if (!setjmp (SCM_JMPBUF (tmp)))\ |
6dbd0af5 MD |
1361 | scm_ithrow (scm_i_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
1362 | }\ | |
1363 | }\ | |
1364 | } | |
0f2d19dd JB |
1365 | #undef RETURN |
1366 | #define RETURN(e) {proc = (e); goto exit;} | |
b7ff98dd MD |
1367 | #ifdef STACK_CHECKING |
1368 | #ifndef EVAL_STACK_CHECKING | |
1369 | #define EVAL_STACK_CHECKING | |
1370 | #endif | |
6dbd0af5 MD |
1371 | #endif |
1372 | ||
1373 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1374 | * *fixme*: Although efficiency is important here, this state variable | |
1375 | * should probably not be a global. It should be related to the | |
1376 | * current repl. | |
1377 | */ | |
1378 | ||
1cc91f1b JB |
1379 | |
1380 | SCM (*scm_ceval_ptr) SCM_P ((SCM x, SCM env)); | |
0f2d19dd | 1381 | |
1646d37b | 1382 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1383 | * information stack frame. It is accessed very often from the |
1384 | * debugging evaluator, so it should probably not be indirectly | |
1385 | * addressed. Better to save and restore it from the current root at | |
1386 | * any stack swaps. | |
1387 | */ | |
1388 | ||
1646d37b MD |
1389 | #ifndef USE_THREADS |
1390 | scm_debug_frame *scm_last_debug_frame; | |
1391 | #endif | |
6dbd0af5 MD |
1392 | |
1393 | /* scm_debug_eframe_size is the number of slots available for pseudo | |
1394 | * stack frames at each real stack frame. | |
1395 | */ | |
1396 | ||
1397 | int scm_debug_eframe_size; | |
1398 | ||
b7ff98dd | 1399 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 1400 | |
a74145b8 MD |
1401 | int scm_eval_stack; |
1402 | ||
33b97402 | 1403 | scm_option scm_eval_opts[] = { |
a74145b8 | 1404 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
1405 | }; |
1406 | ||
6dbd0af5 | 1407 | scm_option scm_debug_opts[] = { |
b7ff98dd MD |
1408 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1409 | "*Flyweight representation of the stack at traps." }, | |
1410 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1411 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1412 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1413 | "Record procedure names at definition." }, | |
1414 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1415 | "Display backtrace in anti-chronological order." }, | |
4e646a03 MD |
1416 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1417 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1418 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1419 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1420 | "Maximal number of stored backtrace frames." }, | |
1421 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1422 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1423 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
a74145b8 | 1424 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." } |
6dbd0af5 MD |
1425 | }; |
1426 | ||
1427 | scm_option scm_evaluator_trap_table[] = { | |
b6d75948 | 1428 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
1429 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1430 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
1431 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." } | |
6dbd0af5 MD |
1432 | }; |
1433 | ||
33b97402 MD |
1434 | SCM_PROC (s_eval_options_interface, "eval-options-interface", 0, 1, 0, scm_eval_options_interface); |
1435 | ||
1436 | SCM | |
8ecf1f13 | 1437 | scm_eval_options_interface (SCM setting) |
33b97402 MD |
1438 | { |
1439 | SCM ans; | |
1440 | SCM_DEFER_INTS; | |
1441 | ans = scm_options (setting, | |
1442 | scm_eval_opts, | |
1443 | SCM_N_EVAL_OPTIONS, | |
1444 | s_eval_options_interface); | |
a74145b8 | 1445 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
1446 | SCM_ALLOW_INTS; |
1447 | return ans; | |
1448 | } | |
1449 | ||
1450 | SCM_PROC (s_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, scm_evaluator_traps); | |
1451 | ||
1452 | SCM | |
1453 | scm_evaluator_traps (setting) | |
1454 | SCM setting; | |
1455 | { | |
1456 | SCM ans; | |
1457 | SCM_DEFER_INTS; | |
1458 | ans = scm_options (setting, | |
1459 | scm_evaluator_trap_table, | |
1460 | SCM_N_EVALUATOR_TRAPS, | |
1461 | s_evaluator_traps); | |
1462 | SCM_RESET_DEBUG_MODE; | |
1463 | SCM_ALLOW_INTS | |
1464 | return ans; | |
1465 | } | |
1466 | ||
6dbd0af5 | 1467 | SCM |
680ed4a8 MD |
1468 | scm_deval_args (l, env, proc, lloc) |
1469 | SCM l, env, proc, *lloc; | |
0f2d19dd | 1470 | { |
680ed4a8 | 1471 | SCM *results = lloc, res; |
0f2d19dd JB |
1472 | while (SCM_NIMP (l)) |
1473 | { | |
cf7c17e9 | 1474 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1475 | if (SCM_IMP (l)) |
1476 | goto wrongnumargs; | |
1477 | else if (SCM_CONSP (l)) | |
1478 | { | |
1479 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1480 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1481 | else |
1482 | res = EVALCELLCAR (l, env); | |
1483 | } | |
1484 | else if (SCM_TYP3 (l) == 1) | |
1485 | { | |
1486 | if ((res = SCM_GLOC_VAL (SCM_CAR (l))) == 0) | |
1487 | res = SCM_CAR (l); /* struct planted in code */ | |
1488 | } | |
1489 | else | |
1490 | goto wrongnumargs; | |
1491 | #else | |
1492 | res = EVALCAR (l, env); | |
1493 | #endif | |
1494 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1495 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1496 | l = SCM_CDR (l); |
1497 | } | |
cf7c17e9 | 1498 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1499 | if (SCM_NNULLP (l)) |
1500 | { | |
1501 | wrongnumargs: | |
1502 | scm_wrong_num_args (proc); | |
1503 | } | |
1504 | #endif | |
1505 | return *results; | |
0f2d19dd JB |
1506 | } |
1507 | ||
6dbd0af5 MD |
1508 | #endif /* !DEVAL */ |
1509 | ||
1510 | ||
1511 | /* SECTION: Some local definitions for the evaluator. | |
1512 | */ | |
1513 | ||
1514 | #ifndef DEVAL | |
1515 | #ifdef SCM_FLOATS | |
1516 | #define CHECK_EQVISH(A,B) (((A) == (B)) || (SCM_NFALSEP (scm_eqv_p ((A), (B))))) | |
1517 | #else | |
1518 | #define CHECK_EQVISH(A,B) ((A) == (B)) | |
1519 | #endif | |
1520 | #endif /* DEVAL */ | |
1521 | ||
399dedcc | 1522 | #define BUILTIN_RPASUBR /* Handle rpsubrs and asubrs without calling apply */ |
6dbd0af5 MD |
1523 | |
1524 | /* SECTION: This is the evaluator. Like any real monster, it has | |
1525 | * three heads. This code is compiled twice. | |
1526 | */ | |
1527 | ||
0f2d19dd | 1528 | #if 0 |
1cc91f1b | 1529 | |
0f2d19dd JB |
1530 | SCM |
1531 | scm_ceval (x, env) | |
1532 | SCM x; | |
1533 | SCM env; | |
0f2d19dd JB |
1534 | {} |
1535 | #endif | |
1536 | #if 0 | |
1cc91f1b | 1537 | |
0f2d19dd JB |
1538 | SCM |
1539 | scm_deval (x, env) | |
1540 | SCM x; | |
1541 | SCM env; | |
0f2d19dd JB |
1542 | {} |
1543 | #endif | |
1544 | ||
6dbd0af5 | 1545 | SCM |
0f2d19dd JB |
1546 | SCM_CEVAL (x, env) |
1547 | SCM x; | |
1548 | SCM env; | |
1549 | { | |
1550 | union | |
1551 | { | |
1552 | SCM *lloc; | |
1553 | SCM arg1; | |
f8769b1d | 1554 | } t; |
6dbd0af5 MD |
1555 | SCM proc, arg2; |
1556 | #ifdef DEVAL | |
c0ab1b8d JB |
1557 | scm_debug_frame debug; |
1558 | scm_debug_info *debug_info_end; | |
1646d37b | 1559 | debug.prev = scm_last_debug_frame; |
6dbd0af5 | 1560 | debug.status = scm_debug_eframe_size; |
c0ab1b8d JB |
1561 | debug.vect = (scm_debug_info *) alloca (scm_debug_eframe_size |
1562 | * sizeof (debug.vect[0])); | |
1563 | debug.info = debug.vect; | |
1564 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1565 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1566 | #endif |
b7ff98dd MD |
1567 | #ifdef EVAL_STACK_CHECKING |
1568 | if (SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc) | |
1569 | && scm_stack_checking_enabled_p) | |
6dbd0af5 | 1570 | { |
b7ff98dd | 1571 | #ifdef DEVAL |
6dbd0af5 MD |
1572 | debug.info->e.exp = x; |
1573 | debug.info->e.env = env; | |
b7ff98dd | 1574 | #endif |
6dbd0af5 MD |
1575 | scm_report_stack_overflow (); |
1576 | } | |
1577 | #endif | |
1578 | #ifdef DEVAL | |
1579 | goto start; | |
1580 | #endif | |
1581 | loopnoap: | |
1582 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1583 | loop: | |
1584 | #ifdef DEVAL | |
b7ff98dd MD |
1585 | SCM_CLEAR_ARGSREADY (debug); |
1586 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1587 | --debug.info; |
c0ab1b8d | 1588 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1589 | { |
b7ff98dd | 1590 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1591 | debug.info -= 2; |
1592 | } | |
1593 | start: | |
1594 | debug.info->e.exp = x; | |
1595 | debug.info->e.env = env; | |
b6d75948 | 1596 | if (CHECK_ENTRY && SCM_TRAPS_P) |
b7ff98dd | 1597 | if (SCM_ENTER_FRAME_P || (SCM_BREAKPOINTS_P && SRCBRKP (x))) |
6dbd0af5 | 1598 | { |
b7ff98dd MD |
1599 | SCM tail = SCM_TAILRECP (debug) ? SCM_BOOL_T : SCM_BOOL_F; |
1600 | SCM_SET_TAILREC (debug); | |
b7ff98dd | 1601 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 1602 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
1603 | else |
1604 | { | |
1605 | scm_make_cont (&t.arg1); | |
ca6ef71a | 1606 | if (setjmp (SCM_JMPBUF (t.arg1))) |
6dbd0af5 MD |
1607 | { |
1608 | x = SCM_THROW_VALUE (t.arg1); | |
1609 | if (SCM_IMP (x)) | |
1610 | { | |
1611 | RETURN (x); | |
1612 | } | |
1613 | else | |
1614 | /* This gives the possibility for the debugger to | |
1615 | modify the source expression before evaluation. */ | |
1616 | goto dispatch; | |
1617 | } | |
1618 | } | |
1619 | scm_ithrow (scm_i_enter_frame, | |
1620 | scm_cons2 (t.arg1, tail, | |
1621 | scm_cons (scm_unmemocopy (x, env), SCM_EOL)), | |
1622 | 0); | |
1623 | } | |
6dbd0af5 | 1624 | #endif |
e3173f93 | 1625 | #if defined (USE_THREADS) || defined (DEVAL) |
f8769b1d | 1626 | dispatch: |
e3173f93 | 1627 | #endif |
9cb5124f | 1628 | SCM_TICK; |
0f2d19dd JB |
1629 | switch (SCM_TYP7 (x)) |
1630 | { | |
1631 | case scm_tcs_symbols: | |
1632 | /* Only happens when called at top level. | |
1633 | */ | |
1634 | x = scm_cons (x, SCM_UNDEFINED); | |
1635 | goto retval; | |
1636 | ||
1637 | case (127 & SCM_IM_AND): | |
1638 | x = SCM_CDR (x); | |
1639 | t.arg1 = x; | |
1640 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1641 | if (SCM_FALSEP (EVALCAR (x, env))) | |
1642 | { | |
1643 | RETURN (SCM_BOOL_F); | |
1644 | } | |
1645 | else | |
1646 | x = t.arg1; | |
6dbd0af5 | 1647 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1648 | goto carloop; |
1649 | ||
1650 | case (127 & SCM_IM_BEGIN): | |
6dbd0af5 MD |
1651 | cdrxnoap: |
1652 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
0f2d19dd JB |
1653 | cdrxbegin: |
1654 | x = SCM_CDR (x); | |
1655 | ||
1656 | begin: | |
1657 | t.arg1 = x; | |
1658 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1659 | { | |
1660 | SIDEVAL (SCM_CAR (x), env); | |
1661 | x = t.arg1; | |
1662 | } | |
1663 | ||
1664 | carloop: /* scm_eval car of last form in list */ | |
1665 | if (SCM_NCELLP (SCM_CAR (x))) | |
1666 | { | |
1667 | x = SCM_CAR (x); | |
6cb702da | 1668 | RETURN (SCM_IMP (x) ? SCM_EVALIM (x, env) : SCM_GLOC_VAL (x)) |
0f2d19dd JB |
1669 | } |
1670 | ||
1671 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
1672 | { | |
1673 | retval: | |
6dbd0af5 | 1674 | RETURN (*scm_lookupcar (x, env)) |
0f2d19dd JB |
1675 | } |
1676 | ||
1677 | x = SCM_CAR (x); | |
1678 | goto loop; /* tail recurse */ | |
1679 | ||
1680 | ||
1681 | case (127 & SCM_IM_CASE): | |
1682 | x = SCM_CDR (x); | |
1683 | t.arg1 = EVALCAR (x, env); | |
1684 | while (SCM_NIMP (x = SCM_CDR (x))) | |
1685 | { | |
1686 | proc = SCM_CAR (x); | |
1687 | if (scm_i_else == SCM_CAR (proc)) | |
1688 | { | |
1689 | x = SCM_CDR (proc); | |
6dbd0af5 | 1690 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1691 | goto begin; |
1692 | } | |
1693 | proc = SCM_CAR (proc); | |
1694 | while (SCM_NIMP (proc)) | |
1695 | { | |
1696 | if (CHECK_EQVISH (SCM_CAR (proc), t.arg1)) | |
1697 | { | |
1698 | x = SCM_CDR (SCM_CAR (x)); | |
6dbd0af5 | 1699 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1700 | goto begin; |
1701 | } | |
1702 | proc = SCM_CDR (proc); | |
1703 | } | |
1704 | } | |
6dbd0af5 | 1705 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
1706 | |
1707 | ||
1708 | case (127 & SCM_IM_COND): | |
1709 | while (SCM_NIMP (x = SCM_CDR (x))) | |
1710 | { | |
1711 | proc = SCM_CAR (x); | |
1712 | t.arg1 = EVALCAR (proc, env); | |
1713 | if (SCM_NFALSEP (t.arg1)) | |
1714 | { | |
1715 | x = SCM_CDR (proc); | |
6dbd0af5 | 1716 | if SCM_NULLP (x) |
0f2d19dd | 1717 | { |
6dbd0af5 | 1718 | RETURN (t.arg1) |
0f2d19dd JB |
1719 | } |
1720 | if (scm_i_arrow != SCM_CAR (x)) | |
6dbd0af5 MD |
1721 | { |
1722 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1723 | goto begin; | |
1724 | } | |
0f2d19dd JB |
1725 | proc = SCM_CDR (x); |
1726 | proc = EVALCAR (proc, env); | |
1727 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
1728 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
1729 | ENTER_APPLY; | |
0f2d19dd JB |
1730 | goto evap1; |
1731 | } | |
1732 | } | |
6dbd0af5 | 1733 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
1734 | |
1735 | ||
1736 | case (127 & SCM_IM_DO): | |
1737 | x = SCM_CDR (x); | |
1738 | proc = SCM_CAR (SCM_CDR (x)); /* inits */ | |
1739 | t.arg1 = SCM_EOL; /* values */ | |
1740 | while (SCM_NIMP (proc)) | |
1741 | { | |
1742 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
1743 | proc = SCM_CDR (proc); | |
1744 | } | |
e2806c10 | 1745 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd JB |
1746 | x = SCM_CDR (SCM_CDR (x)); |
1747 | while (proc = SCM_CAR (x), SCM_FALSEP (EVALCAR (proc, env))) | |
1748 | { | |
1749 | for (proc = SCM_CAR (SCM_CDR (x)); SCM_NIMP (proc); proc = SCM_CDR (proc)) | |
1750 | { | |
1751 | t.arg1 = SCM_CAR (proc); /* body */ | |
1752 | SIDEVAL (t.arg1, env); | |
1753 | } | |
1754 | for (t.arg1 = SCM_EOL, proc = SCM_CDR (SCM_CDR (x)); SCM_NIMP (proc); proc = SCM_CDR (proc)) | |
1755 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); /* steps */ | |
e2806c10 | 1756 | env = EXTEND_ENV (SCM_CAR (SCM_CAR (env)), t.arg1, SCM_CDR (env)); |
0f2d19dd JB |
1757 | } |
1758 | x = SCM_CDR (proc); | |
1759 | if (SCM_NULLP (x)) | |
6dbd0af5 MD |
1760 | RETURN (SCM_UNSPECIFIED); |
1761 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
0f2d19dd JB |
1762 | goto begin; |
1763 | ||
1764 | ||
1765 | case (127 & SCM_IM_IF): | |
1766 | x = SCM_CDR (x); | |
1767 | if (SCM_NFALSEP (EVALCAR (x, env))) | |
1768 | x = SCM_CDR (x); | |
1769 | else if (SCM_IMP (x = SCM_CDR (SCM_CDR (x)))) | |
1770 | { | |
1771 | RETURN (SCM_UNSPECIFIED); | |
1772 | } | |
6dbd0af5 | 1773 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1774 | goto carloop; |
1775 | ||
1776 | ||
1777 | case (127 & SCM_IM_LET): | |
1778 | x = SCM_CDR (x); | |
1779 | proc = SCM_CAR (SCM_CDR (x)); | |
1780 | t.arg1 = SCM_EOL; | |
1781 | do | |
1782 | { | |
1783 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
1784 | } | |
1785 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
e2806c10 | 1786 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd | 1787 | x = SCM_CDR (x); |
6dbd0af5 | 1788 | goto cdrxnoap; |
0f2d19dd JB |
1789 | |
1790 | ||
1791 | case (127 & SCM_IM_LETREC): | |
1792 | x = SCM_CDR (x); | |
e2806c10 | 1793 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd JB |
1794 | x = SCM_CDR (x); |
1795 | proc = SCM_CAR (x); | |
1796 | t.arg1 = SCM_EOL; | |
1797 | do | |
1798 | { | |
1799 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
1800 | } | |
1801 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
a23afe53 | 1802 | SCM_SETCDR (SCM_CAR (env), t.arg1); |
6dbd0af5 | 1803 | goto cdrxnoap; |
0f2d19dd JB |
1804 | |
1805 | ||
1806 | case (127 & SCM_IM_LETSTAR): | |
1807 | x = SCM_CDR (x); | |
1808 | proc = SCM_CAR (x); | |
1809 | if (SCM_IMP (proc)) | |
1810 | { | |
e2806c10 | 1811 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 | 1812 | goto cdrxnoap; |
0f2d19dd JB |
1813 | } |
1814 | do | |
1815 | { | |
1816 | t.arg1 = SCM_CAR (proc); | |
1817 | proc = SCM_CDR (proc); | |
e2806c10 | 1818 | env = EXTEND_ENV (t.arg1, EVALCAR (proc, env), env); |
0f2d19dd JB |
1819 | } |
1820 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
6dbd0af5 | 1821 | goto cdrxnoap; |
0f2d19dd JB |
1822 | |
1823 | case (127 & SCM_IM_OR): | |
1824 | x = SCM_CDR (x); | |
1825 | t.arg1 = x; | |
1826 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1827 | { | |
1828 | x = EVALCAR (x, env); | |
1829 | if (SCM_NFALSEP (x)) | |
1830 | { | |
1831 | RETURN (x); | |
1832 | } | |
1833 | x = t.arg1; | |
1834 | } | |
6dbd0af5 | 1835 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1836 | goto carloop; |
1837 | ||
1838 | ||
1839 | case (127 & SCM_IM_LAMBDA): | |
1840 | RETURN (scm_closure (SCM_CDR (x), env)); | |
1841 | ||
1842 | ||
1843 | case (127 & SCM_IM_QUOTE): | |
1844 | RETURN (SCM_CAR (SCM_CDR (x))); | |
1845 | ||
1846 | ||
1847 | case (127 & SCM_IM_SET): | |
0f2d19dd JB |
1848 | x = SCM_CDR (x); |
1849 | proc = SCM_CAR (x); | |
6dbd0af5 | 1850 | switch (7 & (int) proc) |
0f2d19dd JB |
1851 | { |
1852 | case 0: | |
1853 | t.lloc = scm_lookupcar (x, env); | |
1854 | break; | |
1855 | case 1: | |
a23afe53 | 1856 | t.lloc = SCM_GLOC_VAL_LOC (proc); |
0f2d19dd JB |
1857 | break; |
1858 | #ifdef MEMOIZE_LOCALS | |
1859 | case 4: | |
1860 | t.lloc = scm_ilookup (proc, env); | |
1861 | break; | |
1862 | #endif | |
1863 | } | |
1864 | x = SCM_CDR (x); | |
1865 | *t.lloc = EVALCAR (x, env); | |
0f2d19dd JB |
1866 | #ifdef SICP |
1867 | RETURN (*t.lloc); | |
1868 | #else | |
1869 | RETURN (SCM_UNSPECIFIED); | |
1870 | #endif | |
1871 | ||
1872 | ||
1873 | case (127 & SCM_IM_DEFINE): /* only for internal defines */ | |
1874 | x = SCM_CDR (x); | |
1875 | proc = SCM_CAR (x); | |
1876 | x = SCM_CDR (x); | |
1877 | x = evalcar (x, env); | |
6dbd0af5 | 1878 | #ifdef DEBUG_EXTENSIONS |
80ea260c MD |
1879 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x)) |
1880 | { | |
1881 | t.arg1 = x; | |
1882 | proc: | |
1883 | if (SCM_CLOSUREP (t.arg1) | |
1884 | /* Only the first definition determines the name. */ | |
1885 | && (scm_procedure_property (t.arg1, scm_i_inner_name) | |
1886 | == SCM_BOOL_F)) | |
1887 | scm_set_procedure_property_x (t.arg1, scm_i_inner_name, proc); | |
1888 | else if (SCM_TYP16 (t.arg1) == scm_tc16_macro | |
1889 | && SCM_CDR (t.arg1) != t.arg1) | |
1890 | { | |
1891 | t.arg1 = SCM_CDR (t.arg1); | |
1892 | goto proc; | |
1893 | } | |
1894 | } | |
6dbd0af5 | 1895 | #endif |
0f2d19dd JB |
1896 | env = SCM_CAR (env); |
1897 | SCM_DEFER_INTS; | |
a23afe53 MD |
1898 | SCM_SETCAR (env, scm_cons (proc, SCM_CAR (env))); |
1899 | SCM_SETCDR (env, scm_cons (x, SCM_CDR (env))); | |
0f2d19dd JB |
1900 | SCM_ALLOW_INTS; |
1901 | RETURN (SCM_UNSPECIFIED); | |
1902 | ||
1903 | ||
0f2d19dd JB |
1904 | /* new syntactic forms go here. */ |
1905 | case (127 & SCM_MAKISYM (0)): | |
1906 | proc = SCM_CAR (x); | |
1907 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
1908 | switch SCM_ISYMNUM (proc) | |
1909 | { | |
1910 | #if 0 | |
1911 | case (SCM_ISYMNUM (IM_VREF)): | |
1912 | { | |
1913 | SCM var; | |
1914 | var = SCM_CAR (SCM_CDR (x)); | |
1915 | RETURN (SCM_CDR(var)); | |
1916 | } | |
1917 | case (SCM_ISYMNUM (IM_VSET)): | |
1918 | SCM_CDR (SCM_CAR ( SCM_CDR (x))) = EVALCAR( SCM_CDR ( SCM_CDR (x)), env); | |
1919 | SCM_CAR (SCM_CAR ( SCM_CDR (x))) = scm_tc16_variable; | |
6dbd0af5 | 1920 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
1921 | #endif |
1922 | ||
1923 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
1924 | proc = SCM_CDR (x); | |
1925 | proc = EVALCAR (proc, env); | |
1926 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
1927 | if (SCM_CLOSUREP (proc)) | |
1928 | { | |
1609038c | 1929 | SCM argl, tl; |
6dbd0af5 | 1930 | PREP_APPLY (proc, SCM_EOL); |
0f2d19dd JB |
1931 | t.arg1 = SCM_CDR (SCM_CDR (x)); |
1932 | t.arg1 = EVALCAR (t.arg1, env); | |
6dbd0af5 MD |
1933 | #ifdef DEVAL |
1934 | debug.info->a.args = t.arg1; | |
1935 | #endif | |
cf7c17e9 | 1936 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
1937 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), t.arg1)) |
1938 | goto wrongnumargs; | |
1939 | #endif | |
c79450dd | 1940 | ENTER_APPLY; |
1609038c MD |
1941 | /* Copy argument list */ |
1942 | if (SCM_IMP (t.arg1)) | |
1943 | argl = t.arg1; | |
1944 | else | |
1945 | { | |
1946 | argl = tl = scm_cons (SCM_CAR (t.arg1), SCM_UNSPECIFIED); | |
1947 | while (SCM_NIMP (t.arg1 = SCM_CDR (t.arg1)) | |
1948 | && SCM_CONSP (t.arg1)) | |
1949 | { | |
1950 | SCM_SETCDR (tl, scm_cons (SCM_CAR (t.arg1), | |
1951 | SCM_UNSPECIFIED)); | |
1952 | tl = SCM_CDR (tl); | |
1953 | } | |
1954 | SCM_SETCDR (tl, t.arg1); | |
1955 | } | |
1956 | ||
1957 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), argl, SCM_ENV (proc)); | |
0f2d19dd JB |
1958 | x = SCM_CODE (proc); |
1959 | goto cdrxbegin; | |
1960 | } | |
1961 | proc = scm_i_apply; | |
1962 | goto evapply; | |
1963 | ||
1964 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
1965 | scm_make_cont (&t.arg1); | |
ca6ef71a | 1966 | if (setjmp (SCM_JMPBUF (t.arg1))) |
0f2d19dd JB |
1967 | { |
1968 | SCM val; | |
1969 | val = SCM_THROW_VALUE (t.arg1); | |
6dbd0af5 | 1970 | RETURN (val); |
0f2d19dd JB |
1971 | } |
1972 | proc = SCM_CDR (x); | |
1973 | proc = evalcar (proc, env); | |
1974 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
1975 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
1976 | ENTER_APPLY; | |
0f2d19dd JB |
1977 | goto evap1; |
1978 | ||
1979 | default: | |
1980 | goto badfun; | |
1981 | } | |
1982 | ||
1983 | default: | |
1984 | proc = x; | |
1985 | badfun: | |
f5bf2977 | 1986 | /* scm_everr (x, env,...) */ |
523f5266 GH |
1987 | scm_misc_error (NULL, |
1988 | "Wrong type to apply: %S", | |
1989 | scm_listify (proc, SCM_UNDEFINED)); | |
0f2d19dd JB |
1990 | case scm_tc7_vector: |
1991 | case scm_tc7_wvect: | |
1992 | case scm_tc7_bvect: | |
1993 | case scm_tc7_byvect: | |
1994 | case scm_tc7_svect: | |
1995 | case scm_tc7_ivect: | |
1996 | case scm_tc7_uvect: | |
1997 | case scm_tc7_fvect: | |
1998 | case scm_tc7_dvect: | |
1999 | case scm_tc7_cvect: | |
2000 | #ifdef LONGLONGS | |
2001 | case scm_tc7_llvect: | |
2002 | #endif | |
2003 | case scm_tc7_string: | |
0f2d19dd | 2004 | case scm_tc7_substring: |
0f2d19dd JB |
2005 | case scm_tc7_smob: |
2006 | case scm_tcs_closures: | |
224822be MD |
2007 | #ifdef CCLO |
2008 | case scm_tc7_cclo: | |
2009 | #endif | |
0f2d19dd JB |
2010 | case scm_tcs_subrs: |
2011 | RETURN (x); | |
2012 | ||
2013 | #ifdef MEMOIZE_LOCALS | |
2014 | case (127 & SCM_ILOC00): | |
2015 | proc = *scm_ilookup (SCM_CAR (x), env); | |
2016 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2017 | #ifndef SCM_RECKLESS |
2018 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2019 | goto checkargs; |
2020 | #endif | |
2021 | #endif | |
2022 | break; | |
2023 | #endif /* ifdef MEMOIZE_LOCALS */ | |
2024 | ||
2025 | ||
2026 | case scm_tcs_cons_gloc: | |
2027 | proc = SCM_GLOC_VAL (SCM_CAR (x)); | |
aa00bd1e MD |
2028 | if (proc == 0) |
2029 | /* This is a struct implanted in the code, not a gloc. */ | |
2030 | RETURN (x); | |
0f2d19dd | 2031 | SCM_ASRTGO (SCM_NIMP (proc), badfun); |
cf7c17e9 JB |
2032 | #ifndef SCM_RECKLESS |
2033 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2034 | goto checkargs; |
2035 | #endif | |
2036 | #endif | |
2037 | break; | |
2038 | ||
2039 | ||
2040 | case scm_tcs_cons_nimcar: | |
2041 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
2042 | { | |
f8769b1d MV |
2043 | #ifdef USE_THREADS |
2044 | t.lloc = scm_lookupcar1 (x, env); | |
2045 | if (t.lloc == NULL) | |
2046 | { | |
2047 | /* we have lost the race, start again. */ | |
2048 | goto dispatch; | |
2049 | } | |
2050 | proc = *t.lloc; | |
2051 | #else | |
0f2d19dd | 2052 | proc = *scm_lookupcar (x, env); |
f8769b1d MV |
2053 | #endif |
2054 | ||
0f2d19dd JB |
2055 | if (SCM_IMP (proc)) |
2056 | { | |
2057 | unmemocar (x, env); | |
2058 | goto badfun; | |
2059 | } | |
2060 | if (scm_tc16_macro == SCM_TYP16 (proc)) | |
2061 | { | |
2062 | unmemocar (x, env); | |
2063 | ||
2064 | handle_a_macro: | |
368bf056 | 2065 | #ifdef DEVAL |
7c354052 MD |
2066 | /* Set a flag during macro expansion so that macro |
2067 | application frames can be deleted from the backtrace. */ | |
2068 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2069 | #endif |
f8769b1d MV |
2070 | t.arg1 = SCM_APPLY (SCM_CDR (proc), x, |
2071 | scm_cons (env, scm_listofnull)); | |
2072 | ||
7c354052 MD |
2073 | #ifdef DEVAL |
2074 | SCM_CLEAR_MACROEXP (debug); | |
2075 | #endif | |
0f2d19dd JB |
2076 | switch ((int) (SCM_CAR (proc) >> 16)) |
2077 | { | |
2078 | case 2: | |
2079 | if (scm_ilength (t.arg1) <= 0) | |
2080 | t.arg1 = scm_cons2 (SCM_IM_BEGIN, t.arg1, SCM_EOL); | |
6dbd0af5 MD |
2081 | #ifdef DEVAL |
2082 | if (!SCM_CLOSUREP (SCM_CDR (proc))) | |
2083 | { | |
f8769b1d | 2084 | |
6dbd0af5 MD |
2085 | #if 0 /* Top-level defines doesn't very often occur in backtraces */ |
2086 | if (scm_m_define == SCM_SUBRF (SCM_CDR (proc)) && SCM_TOP_LEVEL (env)) | |
2087 | /* Prevent memoizing result of define macro */ | |
2088 | { | |
2089 | debug.info->e.exp = scm_cons (SCM_CAR (x), SCM_CDR (x)); | |
2090 | scm_set_source_properties_x (debug.info->e.exp, | |
2091 | scm_source_properties (x)); | |
2092 | } | |
2093 | #endif | |
2094 | SCM_DEFER_INTS; | |
a23afe53 MD |
2095 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2096 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
6dbd0af5 MD |
2097 | SCM_ALLOW_INTS; |
2098 | goto dispatch; | |
2099 | } | |
2100 | /* Prevent memoizing of debug info expression. */ | |
2101 | debug.info->e.exp = scm_cons (SCM_CAR (x), SCM_CDR (x)); | |
2102 | scm_set_source_properties_x (debug.info->e.exp, | |
2103 | scm_source_properties (x)); | |
2104 | #endif | |
0f2d19dd | 2105 | SCM_DEFER_INTS; |
a23afe53 MD |
2106 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2107 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
0f2d19dd | 2108 | SCM_ALLOW_INTS; |
6dbd0af5 | 2109 | goto loopnoap; |
0f2d19dd JB |
2110 | case 1: |
2111 | if (SCM_NIMP (x = t.arg1)) | |
6dbd0af5 | 2112 | goto loopnoap; |
0f2d19dd JB |
2113 | case 0: |
2114 | RETURN (t.arg1); | |
2115 | } | |
2116 | } | |
2117 | } | |
2118 | else | |
2119 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
2120 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2121 | #ifndef SCM_RECKLESS |
2122 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2123 | checkargs: |
2124 | #endif | |
2125 | if (SCM_CLOSUREP (proc)) | |
2126 | { | |
2127 | arg2 = SCM_CAR (SCM_CODE (proc)); | |
2128 | t.arg1 = SCM_CDR (x); | |
2129 | while (SCM_NIMP (arg2)) | |
2130 | { | |
2131 | if (SCM_NCONSP (arg2)) | |
2132 | goto evapply; | |
2133 | if (SCM_IMP (t.arg1)) | |
2134 | goto umwrongnumargs; | |
2135 | arg2 = SCM_CDR (arg2); | |
2136 | t.arg1 = SCM_CDR (t.arg1); | |
2137 | } | |
2138 | if (SCM_NNULLP (t.arg1)) | |
2139 | goto umwrongnumargs; | |
2140 | } | |
2141 | else if (scm_tc16_macro == SCM_TYP16 (proc)) | |
2142 | goto handle_a_macro; | |
2143 | #endif | |
2144 | } | |
2145 | ||
2146 | ||
6dbd0af5 MD |
2147 | evapply: |
2148 | PREP_APPLY (proc, SCM_EOL); | |
2149 | if (SCM_NULLP (SCM_CDR (x))) { | |
2150 | ENTER_APPLY; | |
0f2d19dd JB |
2151 | switch (SCM_TYP7 (proc)) |
2152 | { /* no arguments given */ | |
2153 | case scm_tc7_subr_0: | |
2154 | RETURN (SCM_SUBRF (proc) ()); | |
2155 | case scm_tc7_subr_1o: | |
2156 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2157 | case scm_tc7_lsubr: | |
2158 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2159 | case scm_tc7_rpsubr: | |
2160 | RETURN (SCM_BOOL_T); | |
2161 | case scm_tc7_asubr: | |
2162 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
6dbd0af5 | 2163 | #ifdef CCLO |
0f2d19dd JB |
2164 | case scm_tc7_cclo: |
2165 | t.arg1 = proc; | |
2166 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2167 | #ifdef DEVAL |
2168 | debug.info->a.proc = proc; | |
2169 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2170 | #endif | |
0f2d19dd | 2171 | goto evap1; |
6dbd0af5 | 2172 | #endif |
0f2d19dd JB |
2173 | case scm_tcs_closures: |
2174 | x = SCM_CODE (proc); | |
e2806c10 | 2175 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, SCM_ENV (proc)); |
0f2d19dd | 2176 | goto cdrxbegin; |
da7f71d7 | 2177 | case scm_tcs_cons_gloc: |
9b07e212 MD |
2178 | if (!SCM_I_OPERATORP (proc)) |
2179 | goto badfun; | |
2180 | else | |
da7f71d7 MD |
2181 | { |
2182 | x = (SCM_I_ENTITYP (proc) | |
2183 | ? SCM_ENTITY_PROC_0 (proc) | |
2184 | : SCM_OPERATOR_PROC_0 (proc)); | |
2185 | if (SCM_NIMP (x)) | |
33b97402 MD |
2186 | { |
2187 | if (SCM_TYP7 (x) == scm_tc7_subr_1) | |
2188 | RETURN (SCM_SUBRF (x) (proc)) | |
2189 | else if (SCM_CLOSUREP (x)) | |
2190 | { | |
2191 | t.arg1 = proc; | |
2192 | proc = x; | |
da7f71d7 | 2193 | #ifdef DEVAL |
33b97402 MD |
2194 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); |
2195 | debug.info->a.proc = proc; | |
da7f71d7 | 2196 | #endif |
33b97402 MD |
2197 | goto clos1; |
2198 | } | |
2199 | } | |
da7f71d7 MD |
2200 | /* Fall through. */ |
2201 | } | |
0f2d19dd JB |
2202 | case scm_tc7_contin: |
2203 | case scm_tc7_subr_1: | |
2204 | case scm_tc7_subr_2: | |
2205 | case scm_tc7_subr_2o: | |
2206 | case scm_tc7_cxr: | |
2207 | case scm_tc7_subr_3: | |
2208 | case scm_tc7_lsubr_2: | |
2209 | umwrongnumargs: | |
2210 | unmemocar (x, env); | |
2211 | wrongnumargs: | |
f5bf2977 GH |
2212 | /* scm_everr (x, env,...) */ |
2213 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
2214 | default: |
2215 | /* handle macros here */ | |
2216 | goto badfun; | |
2217 | } | |
6dbd0af5 | 2218 | } |
0f2d19dd JB |
2219 | |
2220 | /* must handle macros by here */ | |
2221 | x = SCM_CDR (x); | |
cf7c17e9 | 2222 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2223 | if (SCM_IMP (x)) |
2224 | goto wrongnumargs; | |
680ed4a8 MD |
2225 | else if (SCM_CONSP (x)) |
2226 | { | |
2227 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2228 | t.arg1 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2229 | else |
2230 | t.arg1 = EVALCELLCAR (x, env); | |
2231 | } | |
2232 | else if (SCM_TYP3 (x) == 1) | |
2233 | { | |
2234 | if ((t.arg1 = SCM_GLOC_VAL (SCM_CAR (x))) == 0) | |
2235 | t.arg1 = SCM_CAR (x); /* struct planted in code */ | |
2236 | } | |
2237 | else | |
2238 | goto wrongnumargs; | |
2239 | #else | |
0f2d19dd | 2240 | t.arg1 = EVALCAR (x, env); |
680ed4a8 | 2241 | #endif |
6dbd0af5 MD |
2242 | #ifdef DEVAL |
2243 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2244 | #endif | |
0f2d19dd JB |
2245 | x = SCM_CDR (x); |
2246 | if (SCM_NULLP (x)) | |
2247 | { | |
6dbd0af5 | 2248 | ENTER_APPLY; |
0f2d19dd JB |
2249 | evap1: |
2250 | switch (SCM_TYP7 (proc)) | |
6dbd0af5 | 2251 | { /* have one argument in t.arg1 */ |
0f2d19dd JB |
2252 | case scm_tc7_subr_2o: |
2253 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2254 | case scm_tc7_subr_1: | |
2255 | case scm_tc7_subr_1o: | |
2256 | RETURN (SCM_SUBRF (proc) (t.arg1)); | |
2257 | case scm_tc7_cxr: | |
2258 | #ifdef SCM_FLOATS | |
2259 | if (SCM_SUBRF (proc)) | |
2260 | { | |
2261 | if (SCM_INUMP (t.arg1)) | |
2262 | { | |
2263 | RETURN (scm_makdbl (SCM_DSUBRF (proc) ((double) SCM_INUM (t.arg1)), | |
2264 | 0.0)); | |
2265 | } | |
2266 | SCM_ASRTGO (SCM_NIMP (t.arg1), floerr); | |
2267 | if (SCM_REALP (t.arg1)) | |
2268 | { | |
2269 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (SCM_REALPART (t.arg1)), 0.0)); | |
2270 | } | |
2271 | #ifdef SCM_BIGDIG | |
2272 | if (SCM_BIGP (t.arg1)) | |
2273 | { | |
2274 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (scm_big2dbl (t.arg1)), 0.0)); | |
2275 | } | |
2276 | #endif | |
2277 | floerr: | |
2278 | scm_wta (t.arg1, (char *) SCM_ARG1, SCM_CHARS (SCM_SNAME (proc))); | |
2279 | } | |
2280 | #endif | |
2281 | proc = (SCM) SCM_SNAME (proc); | |
2282 | { | |
2283 | char *chrs = SCM_CHARS (proc) + SCM_LENGTH (proc) - 1; | |
2284 | while ('c' != *--chrs) | |
2285 | { | |
2286 | SCM_ASSERT (SCM_NIMP (t.arg1) && SCM_CONSP (t.arg1), | |
2287 | t.arg1, SCM_ARG1, SCM_CHARS (proc)); | |
2288 | t.arg1 = ('a' == *chrs) ? SCM_CAR (t.arg1) : SCM_CDR (t.arg1); | |
2289 | } | |
2290 | RETURN (t.arg1); | |
2291 | } | |
2292 | case scm_tc7_rpsubr: | |
2293 | RETURN (SCM_BOOL_T); | |
2294 | case scm_tc7_asubr: | |
2295 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2296 | case scm_tc7_lsubr: | |
2297 | #ifdef DEVAL | |
6dbd0af5 | 2298 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
0f2d19dd JB |
2299 | #else |
2300 | RETURN (SCM_SUBRF (proc) (scm_cons (t.arg1, SCM_EOL))); | |
2301 | #endif | |
6dbd0af5 | 2302 | #ifdef CCLO |
0f2d19dd JB |
2303 | case scm_tc7_cclo: |
2304 | arg2 = t.arg1; | |
2305 | t.arg1 = proc; | |
2306 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2307 | #ifdef DEVAL |
2308 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); | |
2309 | debug.info->a.proc = proc; | |
2310 | #endif | |
0f2d19dd | 2311 | goto evap2; |
6dbd0af5 | 2312 | #endif |
0f2d19dd | 2313 | case scm_tcs_closures: |
da7f71d7 | 2314 | clos1: |
0f2d19dd JB |
2315 | x = SCM_CODE (proc); |
2316 | #ifdef DEVAL | |
e2806c10 | 2317 | env = EXTEND_ENV (SCM_CAR (x), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2318 | #else |
e2806c10 | 2319 | env = EXTEND_ENV (SCM_CAR (x), scm_cons (t.arg1, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd JB |
2320 | #endif |
2321 | goto cdrxbegin; | |
65e41721 MD |
2322 | case scm_tc7_contin: |
2323 | scm_call_continuation (proc, t.arg1); | |
0c32d76c | 2324 | case scm_tcs_cons_gloc: |
9b07e212 MD |
2325 | if (!SCM_I_OPERATORP (proc)) |
2326 | goto badfun; | |
2327 | else | |
0c32d76c | 2328 | { |
da7f71d7 MD |
2329 | x = (SCM_I_ENTITYP (proc) |
2330 | ? SCM_ENTITY_PROC_1 (proc) | |
2331 | : SCM_OPERATOR_PROC_1 (proc)); | |
2332 | if (SCM_NIMP (x)) | |
33b97402 MD |
2333 | { |
2334 | if (SCM_TYP7 (x) == scm_tc7_subr_2) | |
2335 | RETURN (SCM_SUBRF (x) (proc, t.arg1)) | |
2336 | else if (SCM_CLOSUREP (x)) | |
2337 | { | |
2338 | arg2 = t.arg1; | |
2339 | t.arg1 = proc; | |
2340 | proc = x; | |
0c32d76c | 2341 | #ifdef DEVAL |
33b97402 MD |
2342 | debug.info->a.args = scm_cons (t.arg1, |
2343 | debug.info->a.args); | |
2344 | debug.info->a.proc = proc; | |
0c32d76c | 2345 | #endif |
33b97402 MD |
2346 | goto clos2; |
2347 | } | |
2348 | } | |
0c32d76c MD |
2349 | /* Fall through. */ |
2350 | } | |
0f2d19dd JB |
2351 | case scm_tc7_subr_2: |
2352 | case scm_tc7_subr_0: | |
2353 | case scm_tc7_subr_3: | |
2354 | case scm_tc7_lsubr_2: | |
2355 | goto wrongnumargs; | |
2356 | default: | |
2357 | goto badfun; | |
2358 | } | |
2359 | } | |
cf7c17e9 | 2360 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2361 | if (SCM_IMP (x)) |
2362 | goto wrongnumargs; | |
680ed4a8 MD |
2363 | else if (SCM_CONSP (x)) |
2364 | { | |
2365 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2366 | arg2 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2367 | else |
2368 | arg2 = EVALCELLCAR (x, env); | |
2369 | } | |
2370 | else if (SCM_TYP3 (x) == 1) | |
2371 | { | |
2372 | if ((arg2 = SCM_GLOC_VAL (SCM_CAR (x))) == 0) | |
2373 | arg2 = SCM_CAR (x); /* struct planted in code */ | |
2374 | } | |
2375 | else | |
2376 | goto wrongnumargs; | |
2377 | #else | |
2378 | arg2 = EVALCAR (x, env); | |
0f2d19dd JB |
2379 | #endif |
2380 | { /* have two or more arguments */ | |
6dbd0af5 MD |
2381 | #ifdef DEVAL |
2382 | debug.info->a.args = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2383 | #endif | |
0f2d19dd JB |
2384 | x = SCM_CDR (x); |
2385 | if (SCM_NULLP (x)) { | |
6dbd0af5 | 2386 | ENTER_APPLY; |
0f2d19dd JB |
2387 | #ifdef CCLO |
2388 | evap2: | |
2389 | #endif | |
6dbd0af5 MD |
2390 | switch (SCM_TYP7 (proc)) |
2391 | { /* have two arguments */ | |
2392 | case scm_tc7_subr_2: | |
2393 | case scm_tc7_subr_2o: | |
2394 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2395 | case scm_tc7_lsubr: | |
0f2d19dd | 2396 | #ifdef DEVAL |
6dbd0af5 MD |
2397 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
2398 | #else | |
2399 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, arg2, SCM_EOL))); | |
0f2d19dd | 2400 | #endif |
6dbd0af5 MD |
2401 | case scm_tc7_lsubr_2: |
2402 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_EOL)); | |
2403 | case scm_tc7_rpsubr: | |
2404 | case scm_tc7_asubr: | |
2405 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2406 | #ifdef CCLO | |
2407 | cclon: | |
2408 | case scm_tc7_cclo: | |
0f2d19dd | 2409 | #ifdef DEVAL |
6dbd0af5 MD |
2410 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), proc, |
2411 | scm_cons (debug.info->a.args, SCM_EOL))); | |
0f2d19dd | 2412 | #else |
6dbd0af5 MD |
2413 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), proc, |
2414 | scm_cons2 (t.arg1, arg2, | |
680ed4a8 | 2415 | scm_cons (scm_eval_args (x, env, proc), |
da7f71d7 | 2416 | SCM_EOL)))); |
0f2d19dd | 2417 | #endif |
6dbd0af5 MD |
2418 | /* case scm_tc7_cclo: |
2419 | x = scm_cons(arg2, scm_eval_args(x, env)); | |
2420 | arg2 = t.arg1; | |
2421 | t.arg1 = proc; | |
2422 | proc = SCM_CCLO_SUBR(proc); | |
2423 | goto evap3; */ | |
2424 | #endif | |
0c32d76c | 2425 | case scm_tcs_cons_gloc: |
9b07e212 MD |
2426 | if (!SCM_I_OPERATORP (proc)) |
2427 | goto badfun; | |
2428 | else | |
0c32d76c | 2429 | { |
da7f71d7 MD |
2430 | x = (SCM_I_ENTITYP (proc) |
2431 | ? SCM_ENTITY_PROC_2 (proc) | |
2432 | : SCM_OPERATOR_PROC_2 (proc)); | |
2433 | if (SCM_NIMP (x)) | |
33b97402 MD |
2434 | { |
2435 | if (SCM_TYP7 (x) == scm_tc7_subr_3) | |
2436 | RETURN (SCM_SUBRF (x) (proc, t.arg1, arg2)) | |
2437 | else if (SCM_CLOSUREP (x)) | |
2438 | { | |
0c32d76c | 2439 | #ifdef DEVAL |
33b97402 MD |
2440 | SCM_SET_ARGSREADY (debug); |
2441 | debug.info->a.args = scm_cons (proc, | |
2442 | debug.info->a.args); | |
2443 | debug.info->a.proc = x; | |
2444 | #endif | |
2445 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (x)), | |
2446 | scm_cons2 (proc, t.arg1, | |
65e41721 | 2447 | scm_cons (arg2, SCM_EOL)), |
33b97402 MD |
2448 | SCM_ENV (x)); |
2449 | x = SCM_CODE (x); | |
2450 | goto cdrxbegin; | |
2451 | } | |
2452 | } | |
0c32d76c MD |
2453 | /* Fall through. */ |
2454 | } | |
6dbd0af5 MD |
2455 | case scm_tc7_subr_0: |
2456 | case scm_tc7_cxr: | |
2457 | case scm_tc7_subr_1o: | |
2458 | case scm_tc7_subr_1: | |
2459 | case scm_tc7_subr_3: | |
2460 | case scm_tc7_contin: | |
2461 | goto wrongnumargs; | |
2462 | default: | |
2463 | goto badfun; | |
2464 | case scm_tcs_closures: | |
0c32d76c | 2465 | clos2: |
0f2d19dd | 2466 | #ifdef DEVAL |
da7f71d7 MD |
2467 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
2468 | debug.info->a.args, | |
2469 | SCM_ENV (proc)); | |
0f2d19dd | 2470 | #else |
da7f71d7 MD |
2471 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
2472 | scm_cons2 (t.arg1, arg2, SCM_EOL), SCM_ENV (proc)); | |
0f2d19dd | 2473 | #endif |
6dbd0af5 MD |
2474 | x = SCM_CODE (proc); |
2475 | goto cdrxbegin; | |
2476 | } | |
0f2d19dd | 2477 | } |
cf7c17e9 | 2478 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
2479 | if (SCM_IMP (x) || SCM_NECONSP (x)) |
2480 | goto wrongnumargs; | |
2481 | #endif | |
0f2d19dd | 2482 | #ifdef DEVAL |
6dbd0af5 | 2483 | debug.info->a.args = scm_cons2 (t.arg1, arg2, |
680ed4a8 MD |
2484 | scm_deval_args (x, env, proc, |
2485 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
0f2d19dd | 2486 | #endif |
6dbd0af5 MD |
2487 | ENTER_APPLY; |
2488 | switch (SCM_TYP7 (proc)) | |
2489 | { /* have 3 or more arguments */ | |
0f2d19dd | 2490 | #ifdef DEVAL |
6dbd0af5 MD |
2491 | case scm_tc7_subr_3: |
2492 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
da7f71d7 MD |
2493 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
2494 | SCM_CADDR (debug.info->a.args))); | |
6dbd0af5 | 2495 | case scm_tc7_asubr: |
399dedcc MD |
2496 | #ifdef BUILTIN_RPASUBR |
2497 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
2498 | arg2 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
2499 | do |
2500 | { | |
2501 | t.arg1 = SCM_SUBRF(proc)(t.arg1, SCM_CAR (arg2)); | |
2502 | arg2 = SCM_CDR (arg2); | |
2503 | } | |
2504 | while (SCM_NIMP (arg2)); | |
399dedcc MD |
2505 | RETURN (t.arg1) |
2506 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 2507 | case scm_tc7_rpsubr: |
71d3aa6d MD |
2508 | #ifdef BUILTIN_RPASUBR |
2509 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
2510 | RETURN (SCM_BOOL_F) | |
2511 | t.arg1 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
2512 | do |
2513 | { | |
2514 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (t.arg1)))) | |
2515 | RETURN (SCM_BOOL_F) | |
2516 | arg2 = SCM_CAR (t.arg1); | |
2517 | t.arg1 = SCM_CDR (t.arg1); | |
2518 | } | |
2519 | while (SCM_NIMP (t.arg1)); | |
71d3aa6d MD |
2520 | RETURN (SCM_BOOL_T) |
2521 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 MD |
2522 | RETURN (SCM_APPLY (proc, t.arg1, |
2523 | scm_acons (arg2, | |
2524 | SCM_CDR (SCM_CDR (debug.info->a.args)), | |
2525 | SCM_EOL))) | |
71d3aa6d | 2526 | #endif /* BUILTIN_RPASUBR */ |
399dedcc | 2527 | case scm_tc7_lsubr_2: |
da7f71d7 MD |
2528 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
2529 | SCM_CDR (SCM_CDR (debug.info->a.args)))) | |
399dedcc MD |
2530 | case scm_tc7_lsubr: |
2531 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) | |
0f2d19dd | 2532 | #ifdef CCLO |
6dbd0af5 MD |
2533 | case scm_tc7_cclo: |
2534 | goto cclon; | |
0f2d19dd | 2535 | #endif |
6dbd0af5 | 2536 | case scm_tcs_closures: |
b7ff98dd | 2537 | SCM_SET_ARGSREADY (debug); |
e2806c10 | 2538 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
6dbd0af5 MD |
2539 | debug.info->a.args, |
2540 | SCM_ENV (proc)); | |
2541 | x = SCM_CODE (proc); | |
2542 | goto cdrxbegin; | |
2543 | #else /* DEVAL */ | |
2544 | case scm_tc7_subr_3: | |
2545 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
2546 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, EVALCAR (x, env))); | |
2547 | case scm_tc7_asubr: | |
399dedcc | 2548 | #ifdef BUILTIN_RPASUBR |
da7f71d7 MD |
2549 | t.arg1 = SCM_SUBRF (proc) (t.arg1, arg2); |
2550 | do | |
2551 | { | |
2552 | t.arg1 = SCM_SUBRF(proc)(t.arg1, EVALCAR(x, env)); | |
2553 | x = SCM_CDR(x); | |
2554 | } | |
2555 | while (SCM_NIMP (x)); | |
399dedcc MD |
2556 | RETURN (t.arg1) |
2557 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 2558 | case scm_tc7_rpsubr: |
71d3aa6d MD |
2559 | #ifdef BUILTIN_RPASUBR |
2560 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
2561 | RETURN (SCM_BOOL_F) | |
da7f71d7 MD |
2562 | do |
2563 | { | |
2564 | t.arg1 = EVALCAR (x, env); | |
2565 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, t.arg1))) | |
2566 | RETURN (SCM_BOOL_F) | |
2567 | arg2 = t.arg1; | |
2568 | x = SCM_CDR (x); | |
2569 | } | |
2570 | while (SCM_NIMP (x)); | |
71d3aa6d MD |
2571 | RETURN (SCM_BOOL_T) |
2572 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 | 2573 | RETURN (SCM_APPLY (proc, t.arg1, |
680ed4a8 MD |
2574 | scm_acons (arg2, |
2575 | scm_eval_args (x, env, proc), | |
2576 | SCM_EOL))); | |
71d3aa6d | 2577 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 2578 | case scm_tc7_lsubr_2: |
680ed4a8 | 2579 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, scm_eval_args (x, env, proc))); |
6dbd0af5 | 2580 | case scm_tc7_lsubr: |
680ed4a8 MD |
2581 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, |
2582 | arg2, | |
2583 | scm_eval_args (x, env, proc)))); | |
0f2d19dd | 2584 | #ifdef CCLO |
6dbd0af5 MD |
2585 | case scm_tc7_cclo: |
2586 | goto cclon; | |
0f2d19dd | 2587 | #endif |
6dbd0af5 MD |
2588 | case scm_tcs_closures: |
2589 | #ifdef DEVAL | |
b7ff98dd | 2590 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 2591 | #endif |
e2806c10 | 2592 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
680ed4a8 MD |
2593 | scm_cons2 (t.arg1, |
2594 | arg2, | |
2595 | scm_eval_args (x, env, proc)), | |
6dbd0af5 MD |
2596 | SCM_ENV (proc)); |
2597 | x = SCM_CODE (proc); | |
2598 | goto cdrxbegin; | |
0f2d19dd | 2599 | #endif /* DEVAL */ |
0c32d76c | 2600 | case scm_tcs_cons_gloc: |
9b07e212 MD |
2601 | if (!SCM_I_OPERATORP (proc)) |
2602 | goto badfun; | |
2603 | else | |
da7f71d7 MD |
2604 | { |
2605 | SCM p = (SCM_I_ENTITYP (proc) | |
2606 | ? SCM_ENTITY_PROC_3 (proc) | |
2607 | : SCM_OPERATOR_PROC_3 (proc)); | |
2608 | if (SCM_NIMP (p)) | |
33b97402 MD |
2609 | { |
2610 | if (SCM_TYP7 (p) == scm_tc7_lsubr_2) | |
da7f71d7 | 2611 | #ifdef DEVAL |
33b97402 MD |
2612 | RETURN (SCM_SUBRF (p) (proc, t.arg1, |
2613 | scm_cons (arg2, SCM_CDDR (debug.info->a.args)))) | |
da7f71d7 | 2614 | #else |
33b97402 MD |
2615 | RETURN (SCM_SUBRF (p) (proc, t.arg1, |
2616 | scm_cons (arg2, | |
680ed4a8 | 2617 | scm_eval_args (x, env, proc)))) |
da7f71d7 | 2618 | #endif |
33b97402 MD |
2619 | else if (SCM_CLOSUREP (p)) |
2620 | { | |
da7f71d7 | 2621 | #ifdef DEVAL |
33b97402 MD |
2622 | SCM_SET_ARGSREADY (debug); |
2623 | debug.info->a.args = scm_cons (proc, debug.info->a.args); | |
2624 | debug.info->a.proc = p; | |
2625 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (p)), | |
2626 | scm_cons2 (proc, t.arg1, | |
2627 | scm_cons (arg2, | |
2628 | SCM_CDDDR (debug.info->a.args))), | |
2629 | SCM_ENV (p)); | |
da7f71d7 | 2630 | #else |
33b97402 MD |
2631 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (p)), |
2632 | scm_cons2 (proc, t.arg1, | |
2633 | scm_cons (arg2, | |
680ed4a8 | 2634 | scm_eval_args (x, env, proc))), |
33b97402 MD |
2635 | SCM_ENV (p)); |
2636 | #endif | |
2637 | x = SCM_CODE (p); | |
2638 | goto cdrxbegin; | |
2639 | } | |
2640 | } | |
da7f71d7 MD |
2641 | /* Fall through. */ |
2642 | } | |
6dbd0af5 MD |
2643 | case scm_tc7_subr_2: |
2644 | case scm_tc7_subr_1o: | |
2645 | case scm_tc7_subr_2o: | |
2646 | case scm_tc7_subr_0: | |
2647 | case scm_tc7_cxr: | |
2648 | case scm_tc7_subr_1: | |
2649 | case scm_tc7_contin: | |
2650 | goto wrongnumargs; | |
2651 | default: | |
2652 | goto badfun; | |
2653 | } | |
0f2d19dd JB |
2654 | } |
2655 | #ifdef DEVAL | |
6dbd0af5 | 2656 | exit: |
b6d75948 | 2657 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 2658 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 2659 | { |
b7ff98dd MD |
2660 | SCM_CLEAR_TRACED_FRAME (debug); |
2661 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 2662 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
2663 | else |
2664 | { | |
2665 | scm_make_cont (&t.arg1); | |
ca6ef71a | 2666 | if (setjmp (SCM_JMPBUF (t.arg1))) |
6dbd0af5 MD |
2667 | { |
2668 | proc = SCM_THROW_VALUE (t.arg1); | |
2669 | goto ret; | |
2670 | } | |
2671 | } | |
2672 | scm_ithrow (scm_i_exit_frame, scm_cons2 (t.arg1, proc, SCM_EOL), 0); | |
2673 | } | |
2674 | ret: | |
1646d37b | 2675 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
2676 | return proc; |
2677 | #endif | |
2678 | } | |
2679 | ||
6dbd0af5 MD |
2680 | |
2681 | /* SECTION: This code is compiled once. | |
2682 | */ | |
2683 | ||
0f2d19dd JB |
2684 | #ifndef DEVAL |
2685 | ||
82a2622a | 2686 | /* This code processes the arguments to apply: |
b145c172 JB |
2687 | |
2688 | (apply PROC ARG1 ... ARGS) | |
2689 | ||
82a2622a JB |
2690 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
2691 | ... arguments onto the front of ARGS, and returns the resulting | |
2692 | list. Note that ARGS is a list; thus, the argument to this | |
2693 | function is a list whose last element is a list. | |
2694 | ||
2695 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
2696 | result. apply:nconc2last takes care of building the list of |
2697 | arguments, given (ARG1 ... ARGS). | |
2698 | ||
82a2622a JB |
2699 | Rather than do new consing, apply:nconc2last destroys its argument. |
2700 | On that topic, this code came into my care with the following | |
2701 | beautifully cryptic comment on that topic: "This will only screw | |
2702 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
2703 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 2704 | |
0f2d19dd | 2705 | SCM_PROC(s_nconc2last, "apply:nconc2last", 1, 0, 0, scm_nconc2last); |
1cc91f1b | 2706 | |
0f2d19dd JB |
2707 | SCM |
2708 | scm_nconc2last (lst) | |
2709 | SCM lst; | |
0f2d19dd JB |
2710 | { |
2711 | SCM *lloc; | |
b145c172 | 2712 | SCM_ASSERT (scm_ilength (lst) > 0, lst, SCM_ARG1, s_nconc2last); |
0f2d19dd JB |
2713 | lloc = &lst; |
2714 | while (SCM_NNULLP (SCM_CDR (*lloc))) | |
a23afe53 | 2715 | lloc = SCM_CDRLOC (*lloc); |
b145c172 | 2716 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, s_nconc2last); |
0f2d19dd JB |
2717 | *lloc = SCM_CAR (*lloc); |
2718 | return lst; | |
2719 | } | |
2720 | ||
2721 | #endif /* !DEVAL */ | |
2722 | ||
6dbd0af5 MD |
2723 | |
2724 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
2725 | * It is compiled twice. | |
2726 | */ | |
2727 | ||
0f2d19dd | 2728 | #if 0 |
1cc91f1b | 2729 | |
0f2d19dd JB |
2730 | SCM |
2731 | scm_apply (proc, arg1, args) | |
2732 | SCM proc; | |
2733 | SCM arg1; | |
2734 | SCM args; | |
0f2d19dd JB |
2735 | {} |
2736 | #endif | |
2737 | ||
2738 | #if 0 | |
1cc91f1b | 2739 | |
0f2d19dd JB |
2740 | SCM |
2741 | scm_dapply (proc, arg1, args) | |
2742 | SCM proc; | |
2743 | SCM arg1; | |
2744 | SCM args; | |
0f2d19dd JB |
2745 | {} |
2746 | #endif | |
2747 | ||
1cc91f1b | 2748 | |
82a2622a JB |
2749 | /* Apply a function to a list of arguments. |
2750 | ||
2751 | This function is exported to the Scheme level as taking two | |
2752 | required arguments and a tail argument, as if it were: | |
2753 | (lambda (proc arg1 . args) ...) | |
2754 | Thus, if you just have a list of arguments to pass to a procedure, | |
2755 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
2756 | args, pass the first as ARG1, then cons any remaining fixed args | |
2757 | onto the front of your argument list, and pass that as ARGS. */ | |
2758 | ||
0f2d19dd JB |
2759 | SCM |
2760 | SCM_APPLY (proc, arg1, args) | |
2761 | SCM proc; | |
2762 | SCM arg1; | |
2763 | SCM args; | |
0f2d19dd JB |
2764 | { |
2765 | #ifdef DEBUG_EXTENSIONS | |
2766 | #ifdef DEVAL | |
6dbd0af5 | 2767 | scm_debug_frame debug; |
c0ab1b8d | 2768 | scm_debug_info debug_vect_body; |
1646d37b | 2769 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 2770 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 2771 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
2772 | debug.vect[0].a.proc = proc; |
2773 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 2774 | scm_last_debug_frame = &debug; |
0f2d19dd | 2775 | #else |
b7ff98dd | 2776 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
2777 | return scm_dapply (proc, arg1, args); |
2778 | #endif | |
2779 | #endif | |
2780 | ||
2781 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
2782 | |
2783 | /* If ARGS is the empty list, then we're calling apply with only two | |
2784 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
2785 | the case, futz with things so that ARG1 is the first argument to | |
2786 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
2787 | rest. |
2788 | ||
2789 | Setting the debug apply frame args this way is pretty messy. | |
2790 | Perhaps we should store arg1 and args directly in the frame as | |
2791 | received, and let scm_frame_arguments unpack them, because that's | |
2792 | a relatively rare operation. This works for now; if the Guile | |
2793 | developer archives are still around, see Mikael's post of | |
2794 | 11-Apr-97. */ | |
0f2d19dd JB |
2795 | if (SCM_NULLP (args)) |
2796 | { | |
2797 | if (SCM_NULLP (arg1)) | |
30000774 JB |
2798 | { |
2799 | arg1 = SCM_UNDEFINED; | |
2800 | #ifdef DEVAL | |
2801 | debug.vect[0].a.args = SCM_EOL; | |
2802 | #endif | |
2803 | } | |
0f2d19dd JB |
2804 | else |
2805 | { | |
30000774 JB |
2806 | #ifdef DEVAL |
2807 | debug.vect[0].a.args = arg1; | |
2808 | #endif | |
0f2d19dd JB |
2809 | args = SCM_CDR (arg1); |
2810 | arg1 = SCM_CAR (arg1); | |
2811 | } | |
2812 | } | |
2813 | else | |
2814 | { | |
82a2622a | 2815 | /* SCM_ASRTGO(SCM_NIMP(args) && SCM_CONSP(args), wrongnumargs); */ |
0f2d19dd | 2816 | args = scm_nconc2last (args); |
30000774 JB |
2817 | #ifdef DEVAL |
2818 | debug.vect[0].a.args = scm_cons (arg1, args); | |
2819 | #endif | |
0f2d19dd | 2820 | } |
0f2d19dd | 2821 | #ifdef DEVAL |
b6d75948 | 2822 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
2823 | { |
2824 | SCM tmp; | |
b7ff98dd | 2825 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 2826 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
2827 | else |
2828 | { | |
2829 | scm_make_cont (&tmp); | |
ca6ef71a | 2830 | if (setjmp (SCM_JMPBUF (tmp))) |
6dbd0af5 MD |
2831 | goto entap; |
2832 | } | |
2833 | scm_ithrow (scm_i_enter_frame, scm_cons (tmp, SCM_EOL), 0); | |
2834 | } | |
2835 | entap: | |
2836 | ENTER_APPLY; | |
2837 | #endif | |
2838 | #ifdef CCLO | |
2839 | tail: | |
0f2d19dd JB |
2840 | #endif |
2841 | switch (SCM_TYP7 (proc)) | |
2842 | { | |
2843 | case scm_tc7_subr_2o: | |
2844 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
2845 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
2846 | case scm_tc7_subr_2: | |
269861c7 MD |
2847 | SCM_ASRTGO (SCM_NNULLP (args) && SCM_NULLP (SCM_CDR (args)), |
2848 | wrongnumargs); | |
0f2d19dd JB |
2849 | args = SCM_CAR (args); |
2850 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
2851 | case scm_tc7_subr_0: | |
2852 | SCM_ASRTGO (SCM_UNBNDP (arg1), wrongnumargs); | |
2853 | RETURN (SCM_SUBRF (proc) ()) | |
2854 | case scm_tc7_subr_1: | |
2855 | case scm_tc7_subr_1o: | |
2856 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
2857 | RETURN (SCM_SUBRF (proc) (arg1)) | |
2858 | case scm_tc7_cxr: | |
2859 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
2860 | #ifdef SCM_FLOATS | |
2861 | if (SCM_SUBRF (proc)) | |
2862 | { | |
6dbd0af5 MD |
2863 | if (SCM_INUMP (arg1)) |
2864 | { | |
2865 | RETURN (scm_makdbl (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)), 0.0)); | |
2866 | } | |
0f2d19dd | 2867 | SCM_ASRTGO (SCM_NIMP (arg1), floerr); |
6dbd0af5 MD |
2868 | if (SCM_REALP (arg1)) |
2869 | { | |
2870 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (SCM_REALPART (arg1)), 0.0)); | |
2871 | } | |
0f2d19dd JB |
2872 | #ifdef SCM_BIGDIG |
2873 | if SCM_BIGP | |
2874 | (arg1) | |
2875 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (scm_big2dbl (arg1)), 0.0)) | |
2876 | #endif | |
2877 | floerr: | |
2878 | scm_wta (arg1, (char *) SCM_ARG1, SCM_CHARS (SCM_SNAME (proc))); | |
2879 | } | |
2880 | #endif | |
2881 | proc = (SCM) SCM_SNAME (proc); | |
2882 | { | |
2883 | char *chrs = SCM_CHARS (proc) + SCM_LENGTH (proc) - 1; | |
2884 | while ('c' != *--chrs) | |
2885 | { | |
2886 | SCM_ASSERT (SCM_NIMP (arg1) && SCM_CONSP (arg1), | |
2887 | arg1, SCM_ARG1, SCM_CHARS (proc)); | |
2888 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
2889 | } | |
2890 | RETURN (arg1) | |
2891 | } | |
2892 | case scm_tc7_subr_3: | |
2893 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CAR (SCM_CDR (args)))) | |
2894 | case scm_tc7_lsubr: | |
2895 | #ifdef DEVAL | |
6dbd0af5 | 2896 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)) |
0f2d19dd JB |
2897 | #else |
2898 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))) | |
2899 | #endif | |
2900 | case scm_tc7_lsubr_2: | |
2901 | SCM_ASRTGO (SCM_NIMP (args) && SCM_CONSP (args), wrongnumargs); | |
2902 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))) | |
2903 | case scm_tc7_asubr: | |
2904 | if (SCM_NULLP (args)) | |
2905 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)) | |
2906 | while (SCM_NIMP (args)) | |
2907 | { | |
2908 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
2909 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
2910 | args = SCM_CDR (args); | |
2911 | } | |
2912 | RETURN (arg1); | |
2913 | case scm_tc7_rpsubr: | |
2914 | if (SCM_NULLP (args)) | |
2915 | RETURN (SCM_BOOL_T); | |
2916 | while (SCM_NIMP (args)) | |
2917 | { | |
2918 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
2919 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
2920 | RETURN (SCM_BOOL_F); | |
2921 | arg1 = SCM_CAR (args); | |
2922 | args = SCM_CDR (args); | |
2923 | } | |
2924 | RETURN (SCM_BOOL_T); | |
2925 | case scm_tcs_closures: | |
2926 | #ifdef DEVAL | |
6dbd0af5 | 2927 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
2928 | #else |
2929 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
2930 | #endif | |
cf7c17e9 | 2931 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
2932 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), arg1)) |
2933 | goto wrongnumargs; | |
2934 | #endif | |
1609038c MD |
2935 | |
2936 | /* Copy argument list */ | |
2937 | if (SCM_IMP (arg1)) | |
2938 | args = arg1; | |
2939 | else | |
2940 | { | |
2941 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
2942 | while (SCM_NIMP (arg1 = SCM_CDR (arg1)) | |
2943 | && SCM_CONSP (arg1)) | |
2944 | { | |
2945 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
2946 | SCM_UNSPECIFIED)); | |
2947 | tl = SCM_CDR (tl); | |
2948 | } | |
2949 | SCM_SETCDR (tl, arg1); | |
2950 | } | |
2951 | ||
2952 | args = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), args, SCM_ENV (proc)); | |
0f2d19dd JB |
2953 | proc = SCM_CODE (proc); |
2954 | while (SCM_NNULLP (proc = SCM_CDR (proc))) | |
2955 | arg1 = EVALCAR (proc, args); | |
2956 | RETURN (arg1); | |
2957 | case scm_tc7_contin: | |
2958 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
2959 | scm_call_continuation (proc, arg1); | |
2960 | #ifdef CCLO | |
2961 | case scm_tc7_cclo: | |
2962 | #ifdef DEVAL | |
6dbd0af5 MD |
2963 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
2964 | arg1 = proc; | |
2965 | proc = SCM_CCLO_SUBR (proc); | |
2966 | debug.vect[0].a.proc = proc; | |
2967 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
2968 | #else |
2969 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
2970 | arg1 = proc; |
2971 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 2972 | #endif |
0f2d19dd JB |
2973 | goto tail; |
2974 | #endif | |
0c32d76c | 2975 | case scm_tcs_cons_gloc: |
9b07e212 MD |
2976 | if (!SCM_I_OPERATORP (proc)) |
2977 | goto badproc; | |
2978 | else | |
da7f71d7 MD |
2979 | { |
2980 | #ifdef DEVAL | |
2981 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
2982 | #else | |
2983 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
2984 | #endif | |
2985 | arg1 = proc; | |
2986 | proc = (SCM_NULLP (args) | |
2987 | ? (SCM_I_ENTITYP (proc) | |
2988 | ? SCM_ENTITY_PROC_0 (proc) | |
2989 | : SCM_OPERATOR_PROC_0 (proc)) | |
2990 | : SCM_NULLP (SCM_CDR (args)) | |
2991 | ? (SCM_I_ENTITYP (proc) | |
2992 | ? SCM_ENTITY_PROC_1 (proc) | |
2993 | : SCM_OPERATOR_PROC_1 (proc)) | |
2994 | : SCM_NULLP (SCM_CDDR (args)) | |
2995 | ? (SCM_I_ENTITYP (proc) | |
2996 | ? SCM_ENTITY_PROC_2 (proc) | |
2997 | : SCM_OPERATOR_PROC_2 (proc)) | |
2998 | : (SCM_I_ENTITYP (proc) | |
2999 | ? SCM_ENTITY_PROC_3 (proc) | |
3000 | : SCM_OPERATOR_PROC_3 (proc))); | |
3001 | #ifdef DEVAL | |
3002 | debug.vect[0].a.proc = proc; | |
3003 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3004 | #endif | |
3005 | goto tail; | |
3006 | } | |
0f2d19dd | 3007 | wrongnumargs: |
f5bf2977 | 3008 | scm_wrong_num_args (proc); |
0f2d19dd JB |
3009 | default: |
3010 | badproc: | |
3011 | scm_wta (proc, (char *) SCM_ARG1, "apply"); | |
3012 | RETURN (arg1); | |
3013 | } | |
3014 | #ifdef DEVAL | |
6dbd0af5 | 3015 | exit: |
b6d75948 | 3016 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3017 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3018 | { |
b7ff98dd MD |
3019 | SCM_CLEAR_TRACED_FRAME (debug); |
3020 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3021 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3022 | else |
3023 | { | |
3024 | scm_make_cont (&arg1); | |
ca6ef71a | 3025 | if (setjmp (SCM_JMPBUF (arg1))) |
6dbd0af5 MD |
3026 | { |
3027 | proc = SCM_THROW_VALUE (arg1); | |
3028 | goto ret; | |
3029 | } | |
3030 | } | |
3031 | scm_ithrow (scm_i_exit_frame, scm_cons2 (arg1, proc, SCM_EOL), 0); | |
3032 | } | |
3033 | ret: | |
1646d37b | 3034 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3035 | return proc; |
3036 | #endif | |
3037 | } | |
3038 | ||
6dbd0af5 MD |
3039 | |
3040 | /* SECTION: The rest of this file is only read once. | |
3041 | */ | |
3042 | ||
0f2d19dd JB |
3043 | #ifndef DEVAL |
3044 | ||
6cb702da | 3045 | SCM_PROC (s_map, "map", 2, 0, 1, scm_map); |
1cc91f1b | 3046 | |
368bf056 MD |
3047 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3048 | sequentially, starting with the first element(s). This is used in | |
3049 | evalext.c where the Scheme procedure `serial-map', which guarantees | |
3050 | sequential behaviour, is implemented using scm_map. If the | |
3051 | behaviour changes, we need to update `serial-map'. | |
3052 | */ | |
3053 | ||
0f2d19dd JB |
3054 | SCM |
3055 | scm_map (proc, arg1, args) | |
3056 | SCM proc; | |
3057 | SCM arg1; | |
3058 | SCM args; | |
0f2d19dd JB |
3059 | { |
3060 | long i; | |
3061 | SCM res = SCM_EOL; | |
3062 | SCM *pres = &res; | |
3063 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3064 | ||
3065 | if (SCM_NULLP (arg1)) | |
3066 | return res; | |
3067 | SCM_ASSERT (SCM_NIMP (arg1), arg1, SCM_ARG2, s_map); | |
3068 | if (SCM_NULLP (args)) | |
3069 | { | |
3070 | while (SCM_NIMP (arg1)) | |
3071 | { | |
3072 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG2, s_map); | |
3073 | *pres = scm_cons (scm_apply (proc, SCM_CAR (arg1), scm_listofnull), SCM_EOL); | |
a23afe53 | 3074 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3075 | arg1 = SCM_CDR (arg1); |
3076 | } | |
3077 | return res; | |
3078 | } | |
3079 | args = scm_vector (scm_cons (arg1, args)); | |
3080 | ve = SCM_VELTS (args); | |
cf7c17e9 | 3081 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
3082 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) |
3083 | SCM_ASSERT (SCM_NIMP (ve[i]) && SCM_CONSP (ve[i]), args, SCM_ARG2, s_map); | |
3084 | #endif | |
3085 | while (1) | |
3086 | { | |
3087 | arg1 = SCM_EOL; | |
3088 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
3089 | { | |
3090 | if SCM_IMP | |
3091 | (ve[i]) return res; | |
3092 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3093 | ve[i] = SCM_CDR (ve[i]); | |
3094 | } | |
3095 | *pres = scm_cons (scm_apply (proc, arg1, SCM_EOL), SCM_EOL); | |
a23afe53 | 3096 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3097 | } |
3098 | } | |
3099 | ||
3100 | ||
3101 | SCM_PROC(s_for_each, "for-each", 2, 0, 1, scm_for_each); | |
1cc91f1b | 3102 | |
0f2d19dd JB |
3103 | SCM |
3104 | scm_for_each (proc, arg1, args) | |
3105 | SCM proc; | |
3106 | SCM arg1; | |
3107 | SCM args; | |
0f2d19dd JB |
3108 | { |
3109 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3110 | long i; | |
3111 | if SCM_NULLP (arg1) | |
3112 | return SCM_UNSPECIFIED; | |
3113 | SCM_ASSERT (SCM_NIMP (arg1), arg1, SCM_ARG2, s_for_each); | |
3114 | if SCM_NULLP (args) | |
3115 | { | |
3116 | while SCM_NIMP (arg1) | |
3117 | { | |
3118 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG2, s_for_each); | |
3119 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); | |
3120 | arg1 = SCM_CDR (arg1); | |
3121 | } | |
3122 | return SCM_UNSPECIFIED; | |
3123 | } | |
3124 | args = scm_vector (scm_cons (arg1, args)); | |
3125 | ve = SCM_VELTS (args); | |
cf7c17e9 | 3126 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
3127 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) |
3128 | SCM_ASSERT (SCM_NIMP (ve[i]) && SCM_CONSP (ve[i]), args, SCM_ARG2, s_for_each); | |
3129 | #endif | |
3130 | while (1) | |
3131 | { | |
3132 | arg1 = SCM_EOL; | |
3133 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
3134 | { | |
3135 | if SCM_IMP | |
3136 | (ve[i]) return SCM_UNSPECIFIED; | |
3137 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3138 | ve[i] = SCM_CDR (ve[i]); | |
3139 | } | |
3140 | scm_apply (proc, arg1, SCM_EOL); | |
3141 | } | |
3142 | } | |
3143 | ||
3144 | ||
1cc91f1b | 3145 | |
0f2d19dd JB |
3146 | SCM |
3147 | scm_closure (code, env) | |
3148 | SCM code; | |
3149 | SCM env; | |
0f2d19dd JB |
3150 | { |
3151 | register SCM z; | |
3152 | SCM_NEWCELL (z); | |
3153 | SCM_SETCODE (z, code); | |
a23afe53 | 3154 | SCM_SETENV (z, env); |
0f2d19dd JB |
3155 | return z; |
3156 | } | |
3157 | ||
3158 | ||
3159 | long scm_tc16_promise; | |
1cc91f1b | 3160 | |
0f2d19dd JB |
3161 | SCM |
3162 | scm_makprom (code) | |
3163 | SCM code; | |
0f2d19dd JB |
3164 | { |
3165 | register SCM z; | |
3166 | SCM_NEWCELL (z); | |
f83e2737 | 3167 | SCM_ENTER_A_SECTION; |
a23afe53 MD |
3168 | SCM_SETCDR (z, code); |
3169 | SCM_SETCAR (z, scm_tc16_promise); | |
f83e2737 | 3170 | SCM_EXIT_A_SECTION; |
0f2d19dd JB |
3171 | return z; |
3172 | } | |
3173 | ||
3174 | ||
1cc91f1b JB |
3175 | |
3176 | static int prinprom SCM_P ((SCM exp, SCM port, scm_print_state *pstate)); | |
3177 | ||
0f2d19dd | 3178 | static int |
19402679 | 3179 | prinprom (exp, port, pstate) |
0f2d19dd JB |
3180 | SCM exp; |
3181 | SCM port; | |
19402679 | 3182 | scm_print_state *pstate; |
0f2d19dd | 3183 | { |
19402679 | 3184 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 3185 | scm_puts ("#<promise ", port); |
19402679 MD |
3186 | SCM_SET_WRITINGP (pstate, 1); |
3187 | scm_iprin1 (SCM_CDR (exp), port, pstate); | |
3188 | SCM_SET_WRITINGP (pstate, writingp); | |
b7f3516f | 3189 | scm_putc ('>', port); |
0f2d19dd JB |
3190 | return !0; |
3191 | } | |
3192 | ||
3193 | ||
0f2d19dd | 3194 | SCM_PROC(s_force, "force", 1, 0, 0, scm_force); |
1cc91f1b | 3195 | |
0f2d19dd JB |
3196 | SCM |
3197 | scm_force (x) | |
3198 | SCM x; | |
0f2d19dd | 3199 | { |
eed6e03e JB |
3200 | SCM_ASSERT (SCM_NIMP(x) && SCM_TYP16 (x) == scm_tc16_promise, |
3201 | x, SCM_ARG1, s_force); | |
0f2d19dd JB |
3202 | if (!((1L << 16) & SCM_CAR (x))) |
3203 | { | |
3204 | SCM ans = scm_apply (SCM_CDR (x), SCM_EOL, SCM_EOL); | |
3205 | if (!((1L << 16) & SCM_CAR (x))) | |
3206 | { | |
3207 | SCM_DEFER_INTS; | |
a23afe53 MD |
3208 | SCM_SETCDR (x, ans); |
3209 | SCM_SETOR_CAR (x, (1L << 16)); | |
0f2d19dd JB |
3210 | SCM_ALLOW_INTS; |
3211 | } | |
3212 | } | |
3213 | return SCM_CDR (x); | |
3214 | } | |
3215 | ||
3216 | SCM_PROC (s_promise_p, "promise?", 1, 0, 0, scm_promise_p); | |
1cc91f1b | 3217 | |
0f2d19dd JB |
3218 | SCM |
3219 | scm_promise_p (x) | |
3220 | SCM x; | |
0f2d19dd JB |
3221 | { |
3222 | return ((SCM_NIMP (x) && (SCM_TYP16 (x) == scm_tc16_promise)) | |
3223 | ? SCM_BOOL_T | |
3224 | : SCM_BOOL_F); | |
3225 | } | |
3226 | ||
3227 | SCM_PROC(s_copy_tree, "copy-tree", 1, 0, 0, scm_copy_tree); | |
1cc91f1b | 3228 | |
0f2d19dd JB |
3229 | SCM |
3230 | scm_copy_tree (obj) | |
3231 | SCM obj; | |
0f2d19dd JB |
3232 | { |
3233 | SCM ans, tl; | |
3234 | if SCM_IMP | |
3235 | (obj) return obj; | |
3910272e MD |
3236 | if (SCM_VECTORP (obj)) |
3237 | { | |
3238 | scm_sizet i = SCM_LENGTH (obj); | |
3239 | ans = scm_make_vector (SCM_MAKINUM (i), SCM_UNSPECIFIED); | |
3240 | while (i--) | |
3241 | SCM_VELTS (ans)[i] = scm_copy_tree (SCM_VELTS (obj)[i]); | |
3242 | return ans; | |
3243 | } | |
0f2d19dd JB |
3244 | if SCM_NCONSP (obj) |
3245 | return obj; | |
3246 | /* return scm_cons(scm_copy_tree(SCM_CAR(obj)), scm_copy_tree(SCM_CDR(obj))); */ | |
3247 | ans = tl = scm_cons (scm_copy_tree (SCM_CAR (obj)), SCM_UNSPECIFIED); | |
067affe3 MD |
3248 | { |
3249 | /* Copy source properties possibly associated with head pair. */ | |
3250 | SCM p = scm_whash_lookup (scm_source_whash, obj); | |
3251 | if (SCM_NIMP (p)) | |
3252 | scm_whash_insert (scm_source_whash, ans, p); | |
3253 | } | |
0f2d19dd | 3254 | while (SCM_NIMP (obj = SCM_CDR (obj)) && SCM_CONSP (obj)) |
a23afe53 MD |
3255 | { |
3256 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
3257 | SCM_UNSPECIFIED)); | |
3258 | tl = SCM_CDR (tl); | |
3259 | } | |
3260 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
3261 | return ans; |
3262 | } | |
3263 | ||
1cc91f1b | 3264 | |
0f2d19dd JB |
3265 | SCM |
3266 | scm_eval_3 (obj, copyp, env) | |
3267 | SCM obj; | |
3268 | int copyp; | |
3269 | SCM env; | |
0f2d19dd JB |
3270 | { |
3271 | if (SCM_NIMP (SCM_CDR (scm_system_transformer))) | |
3272 | obj = scm_apply (SCM_CDR (scm_system_transformer), obj, scm_listofnull); | |
3273 | else if (copyp) | |
3274 | obj = scm_copy_tree (obj); | |
6cb702da | 3275 | return SCM_XEVAL (obj, env); |
0f2d19dd JB |
3276 | } |
3277 | ||
1cc91f1b | 3278 | |
0f2d19dd JB |
3279 | SCM |
3280 | scm_top_level_env (thunk) | |
3281 | SCM thunk; | |
0f2d19dd JB |
3282 | { |
3283 | if (SCM_IMP(thunk)) | |
3284 | return SCM_EOL; | |
3285 | else | |
3286 | return scm_cons(thunk, (SCM)SCM_EOL); | |
3287 | } | |
3288 | ||
3289 | SCM_PROC(s_eval2, "eval2", 2, 0, 0, scm_eval2); | |
1cc91f1b | 3290 | |
0f2d19dd JB |
3291 | SCM |
3292 | scm_eval2 (obj, env_thunk) | |
3293 | SCM obj; | |
3294 | SCM env_thunk; | |
0f2d19dd JB |
3295 | { |
3296 | return scm_eval_3 (obj, 1, scm_top_level_env(env_thunk)); | |
3297 | } | |
3298 | ||
3299 | SCM_PROC(s_eval, "eval", 1, 0, 0, scm_eval); | |
1cc91f1b | 3300 | |
0f2d19dd JB |
3301 | SCM |
3302 | scm_eval (obj) | |
3303 | SCM obj; | |
0f2d19dd JB |
3304 | { |
3305 | return | |
dc19d1d2 | 3306 | scm_eval_3(obj, 1, scm_top_level_env(SCM_CDR(scm_top_level_lookup_closure_var))); |
0f2d19dd JB |
3307 | } |
3308 | ||
11f77bfc | 3309 | /* SCM_PROC(s_eval_x, "eval!", 1, 0, 0, scm_eval_x); */ |
1cc91f1b | 3310 | |
0f2d19dd JB |
3311 | SCM |
3312 | scm_eval_x (obj) | |
3313 | SCM obj; | |
0f2d19dd JB |
3314 | { |
3315 | return | |
3316 | scm_eval_3(obj, | |
3317 | 0, | |
dc19d1d2 | 3318 | scm_top_level_env (SCM_CDR (scm_top_level_lookup_closure_var))); |
0f2d19dd JB |
3319 | } |
3320 | ||
3eeba8d4 | 3321 | static const scm_smobfuns promsmob = {scm_markcdr, scm_free0, prinprom}; |
0f2d19dd | 3322 | |
6dbd0af5 MD |
3323 | |
3324 | /* At this point, scm_deval and scm_dapply are generated. | |
3325 | */ | |
3326 | ||
0f2d19dd | 3327 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
3328 | # define DEVAL |
3329 | # include "eval.c" | |
0f2d19dd JB |
3330 | #endif |
3331 | ||
3332 | ||
1cc91f1b | 3333 | |
0f2d19dd JB |
3334 | void |
3335 | scm_init_eval () | |
0f2d19dd | 3336 | { |
33b97402 MD |
3337 | scm_init_opts (scm_evaluator_traps, |
3338 | scm_evaluator_trap_table, | |
3339 | SCM_N_EVALUATOR_TRAPS); | |
3340 | scm_init_opts (scm_eval_options_interface, | |
3341 | scm_eval_opts, | |
3342 | SCM_N_EVAL_OPTIONS); | |
3343 | ||
0f2d19dd | 3344 | scm_tc16_promise = scm_newsmob (&promsmob); |
b8229a3b | 3345 | |
0f2d19dd JB |
3346 | scm_i_apply = scm_make_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
3347 | scm_system_transformer = scm_sysintern ("scm:eval-transformer", SCM_UNDEFINED); | |
3348 | scm_i_dot = SCM_CAR (scm_sysintern (".", SCM_UNDEFINED)); | |
3349 | scm_i_arrow = SCM_CAR (scm_sysintern ("=>", SCM_UNDEFINED)); | |
3350 | scm_i_else = SCM_CAR (scm_sysintern ("else", SCM_UNDEFINED)); | |
3351 | scm_i_unquote = SCM_CAR (scm_sysintern ("unquote", SCM_UNDEFINED)); | |
3352 | scm_i_uq_splicing = SCM_CAR (scm_sysintern ("unquote-splicing", SCM_UNDEFINED)); | |
3353 | ||
3354 | /* acros */ | |
0f2d19dd JB |
3355 | /* end of acros */ |
3356 | ||
dc19d1d2 JB |
3357 | scm_top_level_lookup_closure_var = |
3358 | scm_sysintern("*top-level-lookup-closure*", SCM_BOOL_F); | |
9b8d3288 | 3359 | scm_can_use_top_level_lookup_closure_var = 1; |
0f2d19dd | 3360 | |
6dbd0af5 MD |
3361 | #ifdef DEBUG_EXTENSIONS |
3362 | scm_i_enter_frame = SCM_CAR (scm_sysintern ("enter-frame", SCM_UNDEFINED)); | |
3363 | scm_i_apply_frame = SCM_CAR (scm_sysintern ("apply-frame", SCM_UNDEFINED)); | |
3364 | scm_i_exit_frame = SCM_CAR (scm_sysintern ("exit-frame", SCM_UNDEFINED)); | |
3365 | scm_i_trace = SCM_CAR (scm_sysintern ("trace", SCM_UNDEFINED)); | |
3366 | #endif | |
3367 | ||
0f2d19dd | 3368 | #include "eval.x" |
25eaf21a MD |
3369 | |
3370 | scm_add_feature ("delay"); | |
0f2d19dd | 3371 | } |
0f2d19dd | 3372 | |
6dbd0af5 | 3373 | #endif /* !DEVAL */ |