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9b8d3288 | 1 | /* Copyright (C) 1995,1996,1997 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 | |
15 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
16 | * | |
17 | * As a special exception, the Free Software Foundation gives permission | |
18 | * for additional uses of the text contained in its release of GUILE. | |
19 | * | |
20 | * The exception is that, if you link the GUILE library with other files | |
21 | * to produce an executable, this does not by itself cause the | |
22 | * resulting executable to be covered by the GNU General Public License. | |
23 | * Your use of that executable is in no way restricted on account of | |
24 | * linking the GUILE library code into it. | |
25 | * | |
26 | * This exception does not however invalidate any other reasons why | |
27 | * the executable file might be covered by the GNU General Public License. | |
28 | * | |
29 | * This exception applies only to the code released by the | |
30 | * Free Software Foundation under the name GUILE. If you copy | |
31 | * code from other Free Software Foundation releases into a copy of | |
32 | * GUILE, as the General Public License permits, the exception does | |
33 | * not apply to the code that you add in this way. To avoid misleading | |
34 | * anyone as to the status of such modified files, you must delete | |
35 | * this exception notice from them. | |
36 | * | |
37 | * If you write modifications of your own for GUILE, it is your choice | |
38 | * whether to permit this exception to apply to your modifications. | |
39 | * If you do not wish that, delete this exception notice. | |
40 | */ | |
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 | ||
48b96f4b JB |
57 | /* AIX requires this to be the first thing in the file. The #pragma |
58 | directive is indented so pre-ANSI compilers will ignore it, rather | |
59 | than choke on it. */ | |
5862b540 | 60 | #ifndef __GNUC__ |
48b96f4b JB |
61 | # if HAVE_ALLOCA_H |
62 | # include <alloca.h> | |
63 | # else | |
64 | # ifdef _AIX | |
65 | #pragma alloca | |
66 | # else | |
67 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
68 | char *alloca (); | |
69 | # endif | |
70 | # endif | |
71 | # endif | |
72 | #endif | |
73 | ||
0f2d19dd JB |
74 | #include <stdio.h> |
75 | #include "_scm.h" | |
20e6290e JB |
76 | #include "debug.h" |
77 | #include "append.h" | |
78 | #include "alist.h" | |
79 | #include "sequences.h" | |
80 | #include "eq.h" | |
81 | #include "continuations.h" | |
82 | #include "throw.h" | |
83 | #include "smob.h" | |
84 | #include "markers.h" | |
85 | #include "procprop.h" | |
86 | #include "hashtab.h" | |
ac46ab16 | 87 | #include "hash.h" |
0f2d19dd | 88 | |
20e6290e JB |
89 | #ifdef DEBUG_EXTENSIONS |
90 | #include "debug.h" | |
91 | #endif /* DEBUG_EXTENSIONS */ | |
92 | ||
93 | #include "srcprop.h" | |
94 | #include "stackchk.h" | |
95 | ||
96 | #include "eval.h" | |
0f2d19dd JB |
97 | \f |
98 | ||
6dbd0af5 MD |
99 | /* The evaluator contains a plethora of EVAL symbols. |
100 | * This is an attempt at explanation. | |
101 | * | |
102 | * The following macros should be used in code which is read twice | |
103 | * (where the choice of evaluator is hard soldered): | |
104 | * | |
105 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
106 | * Originally, it is defined to scm_ceval, but is redefined to | |
107 | * scm_deval during the second pass. | |
108 | * | |
109 | * SIDEVAL corresponds to SCM_CEVAL, but is used in situations where | |
110 | * only side effects of expressions matter. All immediates are | |
111 | * ignored. | |
112 | * | |
113 | * EVALIM is used when it is known that the expression is an | |
114 | * immediate. (This macro never calls an evaluator.) | |
115 | * | |
116 | * EVALCAR evaluates the car of an expression. | |
117 | * | |
118 | * EVALCELLCAR is like EVALCAR, but is used when it is known that the | |
119 | * car is a lisp cell. | |
120 | * | |
121 | * The following macros should be used in code which is read once | |
122 | * (where the choice of evaluator is dynamic): | |
123 | * | |
124 | * XEVAL takes care of immediates without calling an evaluator. It | |
125 | * then calls scm_ceval *or* scm_deval, depending on the debugging | |
126 | * mode. | |
127 | * | |
128 | * XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval | |
129 | * depending on the debugging mode. | |
130 | * | |
131 | * The main motivation for keeping this plethora is efficiency | |
132 | * together with maintainability (=> locality of code). | |
133 | */ | |
134 | ||
0f2d19dd JB |
135 | #define EVALCELLCAR(x, env) (SCM_SYMBOLP (SCM_CAR(x)) \ |
136 | ? *scm_lookupcar(x, env) \ | |
137 | : SCM_CEVAL(SCM_CAR(x), env)) | |
138 | ||
139 | #ifdef MEMOIZE_LOCALS | |
6dbd0af5 | 140 | #define EVALIM(x, env) (SCM_ILOCP(x)?*scm_ilookup((x), env):x) |
0f2d19dd | 141 | #else |
6dbd0af5 | 142 | #define EVALIM(x, env) x |
0f2d19dd JB |
143 | #endif |
144 | #define EVALCAR(x, env) (SCM_NCELLP(SCM_CAR(x))\ | |
145 | ? (SCM_IMP(SCM_CAR(x)) \ | |
6dbd0af5 | 146 | ? EVALIM(SCM_CAR(x), env) \ |
0f2d19dd JB |
147 | : SCM_GLOC_VAL(SCM_CAR(x))) \ |
148 | : EVALCELLCAR(x, env)) | |
149 | #ifdef DEBUG_EXTENSIONS | |
150 | #define XEVALCAR(x, env) (SCM_NCELLP(SCM_CAR(x)) \ | |
151 | ? (SCM_IMP(SCM_CAR(x)) \ | |
6dbd0af5 | 152 | ? EVALIM(SCM_CAR(x), env) \ |
0f2d19dd JB |
153 | : SCM_GLOC_VAL(SCM_CAR(x))) \ |
154 | : (SCM_SYMBOLP(SCM_CAR(x)) \ | |
155 | ? *scm_lookupcar(x, env) \ | |
156 | : (*scm_ceval_ptr) (SCM_CAR(x), env))) | |
157 | #else | |
158 | #define XEVALCAR(x, env) EVALCAR(x, env) | |
159 | #endif | |
160 | ||
e2806c10 | 161 | #define EXTEND_ENV SCM_EXTEND_ENV |
0f2d19dd JB |
162 | |
163 | #ifdef MEMOIZE_LOCALS | |
1cc91f1b | 164 | |
0f2d19dd JB |
165 | SCM * |
166 | scm_ilookup (iloc, env) | |
167 | SCM iloc; | |
168 | SCM env; | |
0f2d19dd JB |
169 | { |
170 | register int ir = SCM_IFRAME (iloc); | |
171 | register SCM er = env; | |
172 | for (; 0 != ir; --ir) | |
173 | er = SCM_CDR (er); | |
174 | er = SCM_CAR (er); | |
175 | for (ir = SCM_IDIST (iloc); 0 != ir; --ir) | |
176 | er = SCM_CDR (er); | |
177 | if (SCM_ICDRP (iloc)) | |
a23afe53 MD |
178 | return SCM_CDRLOC (er); |
179 | return SCM_CARLOC (SCM_CDR (er)); | |
0f2d19dd JB |
180 | } |
181 | #endif | |
182 | ||
1cc91f1b | 183 | |
0f2d19dd JB |
184 | SCM * |
185 | scm_lookupcar (vloc, genv) | |
186 | SCM vloc; | |
187 | SCM genv; | |
0f2d19dd JB |
188 | { |
189 | SCM env = genv; | |
190 | register SCM *al, fl, var = SCM_CAR (vloc); | |
191 | #ifdef MEMOIZE_LOCALS | |
192 | register SCM iloc = SCM_ILOC00; | |
193 | #endif | |
194 | for (; SCM_NIMP (env); env = SCM_CDR (env)) | |
195 | { | |
196 | if (SCM_BOOL_T == scm_procedure_p (SCM_CAR (env))) | |
197 | break; | |
a23afe53 | 198 | al = SCM_CARLOC (env); |
0f2d19dd JB |
199 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
200 | { | |
201 | if (SCM_NCONSP (fl)) | |
202 | if (fl == var) | |
203 | { | |
204 | #ifdef MEMOIZE_LOCALS | |
a23afe53 | 205 | SCM_SETCAR (vloc, iloc + SCM_ICDR); |
0f2d19dd | 206 | #endif |
a23afe53 | 207 | return SCM_CDRLOC (*al); |
0f2d19dd JB |
208 | } |
209 | else | |
210 | break; | |
a23afe53 | 211 | al = SCM_CDRLOC (*al); |
0f2d19dd JB |
212 | if (SCM_CAR (fl) == var) |
213 | { | |
214 | #ifdef MEMOIZE_LOCALS | |
215 | #ifndef RECKLESS /* letrec inits to SCM_UNDEFINED */ | |
216 | if (SCM_UNBNDP (SCM_CAR (*al))) | |
217 | { | |
218 | env = SCM_EOL; | |
219 | goto errout; | |
220 | } | |
221 | #endif | |
a23afe53 | 222 | SCM_SETCAR (vloc, iloc); |
0f2d19dd | 223 | #endif |
a23afe53 | 224 | return SCM_CARLOC (*al); |
0f2d19dd JB |
225 | } |
226 | #ifdef MEMOIZE_LOCALS | |
227 | iloc += SCM_IDINC; | |
228 | #endif | |
229 | } | |
230 | #ifdef MEMOIZE_LOCALS | |
231 | iloc = (~SCM_IDSTMSK) & (iloc + SCM_IFRINC); | |
232 | #endif | |
233 | } | |
234 | { | |
235 | SCM top_thunk, vcell; | |
236 | if (SCM_NIMP(env)) | |
237 | { | |
238 | top_thunk = SCM_CAR(env); /* env now refers to a top level env thunk */ | |
239 | env = SCM_CDR (env); | |
240 | } | |
241 | else | |
242 | top_thunk = SCM_BOOL_F; | |
243 | vcell = scm_sym2vcell (var, top_thunk, SCM_BOOL_F); | |
244 | if (vcell == SCM_BOOL_F) | |
245 | goto errout; | |
246 | else | |
247 | var = vcell; | |
248 | } | |
249 | #ifndef RECKLESS | |
250 | if (SCM_NNULLP (env) || SCM_UNBNDP (SCM_CDR (var))) | |
251 | { | |
252 | var = SCM_CAR (var); | |
253 | errout: | |
f5bf2977 | 254 | /* scm_everr (vloc, genv,...) */ |
523f5266 GH |
255 | scm_misc_error (NULL, |
256 | SCM_NULLP (env) | |
257 | ? "Unbound variable: %S" | |
258 | : "Damaged environment: %S", | |
259 | scm_listify (var, SCM_UNDEFINED)); | |
0f2d19dd JB |
260 | } |
261 | #endif | |
a23afe53 | 262 | SCM_SETCAR (vloc, var + 1); |
0f2d19dd JB |
263 | /* Except wait...what if the var is not a vcell, |
264 | * but syntax or something.... | |
265 | */ | |
a23afe53 | 266 | return SCM_CDRLOC (var); |
0f2d19dd JB |
267 | } |
268 | ||
269 | #define unmemocar scm_unmemocar | |
1cc91f1b | 270 | |
0f2d19dd JB |
271 | SCM |
272 | scm_unmemocar (form, env) | |
273 | SCM form; | |
274 | SCM env; | |
0f2d19dd | 275 | { |
6dbd0af5 | 276 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd | 277 | register int ir; |
6dbd0af5 | 278 | #endif |
0f2d19dd JB |
279 | SCM c; |
280 | ||
281 | if (SCM_IMP (form)) | |
282 | return form; | |
283 | c = SCM_CAR (form); | |
284 | if (1 == (c & 7)) | |
a23afe53 | 285 | SCM_SETCAR (form, SCM_CAR (c - 1)); |
0f2d19dd | 286 | #ifdef MEMOIZE_LOCALS |
6dbd0af5 | 287 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd JB |
288 | else if (SCM_ILOCP (c)) |
289 | { | |
290 | for (ir = SCM_IFRAME (c); ir != 0; --ir) | |
291 | env = SCM_CDR (env); | |
292 | env = SCM_CAR (SCM_CAR (env)); | |
293 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
294 | env = SCM_CDR (env); | |
a23afe53 | 295 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); |
0f2d19dd | 296 | } |
6dbd0af5 | 297 | #endif |
0f2d19dd JB |
298 | #endif |
299 | return form; | |
300 | } | |
301 | ||
1cc91f1b | 302 | |
0f2d19dd JB |
303 | SCM |
304 | scm_eval_car (pair, env) | |
305 | SCM pair; | |
306 | SCM env; | |
0f2d19dd | 307 | { |
6dbd0af5 | 308 | return XEVALCAR (pair, env); |
0f2d19dd JB |
309 | } |
310 | ||
311 | \f | |
312 | /* | |
313 | * The following rewrite expressions and | |
314 | * some memoized forms have different syntax | |
315 | */ | |
316 | ||
317 | static char s_expression[] = "missing or extra expression"; | |
318 | static char s_test[] = "bad test"; | |
319 | static char s_body[] = "bad body"; | |
320 | static char s_bindings[] = "bad bindings"; | |
321 | static char s_variable[] = "bad variable"; | |
322 | static char s_clauses[] = "bad or missing clauses"; | |
323 | static char s_formals[] = "bad formals"; | |
324 | #define ASSYNT(_cond, _arg, _pos, _subr) if(!(_cond))scm_wta(_arg, (char *)_pos, _subr); | |
325 | ||
326 | SCM scm_i_dot, scm_i_quote, scm_i_quasiquote, scm_i_lambda, scm_i_let, | |
327 | scm_i_arrow, scm_i_else, scm_i_unquote, scm_i_uq_splicing, scm_i_apply; | |
6dbd0af5 MD |
328 | SCM scm_i_define, scm_i_and, scm_i_begin, scm_i_case, scm_i_cond, |
329 | scm_i_do, scm_i_if, scm_i_let, scm_i_letrec, scm_i_letstar, | |
330 | scm_i_or, scm_i_set, scm_i_atapply, scm_i_atcall_cc; | |
0f2d19dd JB |
331 | static char s_quasiquote[] = "quasiquote"; |
332 | static char s_delay[] = "delay"; | |
6dbd0af5 MD |
333 | static char s_undefine[] = "undefine"; |
334 | #ifdef DEBUG_EXTENSIONS | |
335 | SCM scm_i_enter_frame, scm_i_apply_frame, scm_i_exit_frame; | |
336 | SCM scm_i_trace; | |
337 | #endif | |
0f2d19dd JB |
338 | |
339 | #define ASRTSYNTAX(cond_, msg_) if(!(cond_))scm_wta(xorig, (msg_), what); | |
340 | ||
341 | ||
1cc91f1b JB |
342 | |
343 | static void bodycheck SCM_P ((SCM xorig, SCM *bodyloc, char *what)); | |
344 | ||
0f2d19dd JB |
345 | static void |
346 | bodycheck (xorig, bodyloc, what) | |
347 | SCM xorig; | |
348 | SCM *bodyloc; | |
349 | char *what; | |
0f2d19dd JB |
350 | { |
351 | ASRTSYNTAX (scm_ilength (*bodyloc) >= 1, s_expression); | |
352 | } | |
353 | ||
354 | ||
1cc91f1b | 355 | |
0f2d19dd JB |
356 | SCM |
357 | scm_m_quote (xorig, env) | |
358 | SCM xorig; | |
359 | SCM env; | |
0f2d19dd JB |
360 | { |
361 | ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, xorig, s_expression, "quote"); | |
362 | return scm_cons (SCM_IM_QUOTE, SCM_CDR (xorig)); | |
363 | } | |
364 | ||
365 | ||
1cc91f1b | 366 | |
0f2d19dd JB |
367 | SCM |
368 | scm_m_begin (xorig, env) | |
369 | SCM xorig; | |
370 | SCM env; | |
0f2d19dd JB |
371 | { |
372 | ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 1, xorig, s_expression, "begin"); | |
373 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); | |
374 | } | |
375 | ||
376 | ||
1cc91f1b | 377 | |
0f2d19dd JB |
378 | SCM |
379 | scm_m_if (xorig, env) | |
380 | SCM xorig; | |
381 | SCM env; | |
0f2d19dd JB |
382 | { |
383 | int len = scm_ilength (SCM_CDR (xorig)); | |
384 | ASSYNT (len >= 2 && len <= 3, xorig, s_expression, "if"); | |
385 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); | |
386 | } | |
387 | ||
388 | ||
1cc91f1b | 389 | |
0f2d19dd JB |
390 | SCM |
391 | scm_m_set (xorig, env) | |
392 | SCM xorig; | |
393 | SCM env; | |
0f2d19dd | 394 | { |
6dbd0af5 MD |
395 | SCM x = SCM_CDR (xorig); |
396 | ASSYNT (2 == scm_ilength (x), xorig, s_expression, "set!"); | |
397 | ASSYNT (SCM_NIMP (SCM_CAR (x)) && SCM_SYMBOLP (SCM_CAR (x)), | |
398 | xorig, s_variable, "set!"); | |
0f2d19dd JB |
399 | return scm_cons (SCM_IM_SET, x); |
400 | } | |
401 | ||
402 | ||
403 | #if 0 | |
1cc91f1b | 404 | |
0f2d19dd JB |
405 | SCM |
406 | scm_m_vref (xorig, env) | |
407 | SCM xorig; | |
408 | SCM env; | |
0f2d19dd JB |
409 | { |
410 | SCM x = SCM_CDR (xorig); | |
411 | ASSYNT (1 == scm_ilength (x), xorig, s_expression, s_vref); | |
412 | if (SCM_NIMP(x) && UDSCM_VARIABLEP (SCM_CAR (x))) | |
413 | { | |
f5bf2977 | 414 | /* scm_everr (SCM_UNDEFINED, env,..., "global variable reference") */ |
523f5266 GH |
415 | scm_misc_error (NULL, |
416 | "Bad variable: %S", | |
417 | scm_listify (SCM_CAR (SCM_CDR (x)), SCM_UNDEFINED)); | |
0f2d19dd JB |
418 | } |
419 | ASSYNT (SCM_NIMP(x) && DEFSCM_VARIABLEP (SCM_CAR (x)), | |
420 | xorig, s_variable, s_vref); | |
421 | return | |
422 | return scm_cons (IM_VREF, x); | |
423 | } | |
424 | ||
425 | ||
1cc91f1b | 426 | |
0f2d19dd JB |
427 | SCM |
428 | scm_m_vset (xorig, env) | |
429 | SCM xorig; | |
430 | SCM env; | |
0f2d19dd JB |
431 | { |
432 | SCM x = SCM_CDR (xorig); | |
433 | ASSYNT (3 == scm_ilength (x), xorig, s_expression, s_vset); | |
434 | ASSYNT (( DEFSCM_VARIABLEP (SCM_CAR (x)) | |
435 | || UDSCM_VARIABLEP (SCM_CAR (x))), | |
436 | xorig, s_variable, s_vset); | |
437 | return scm_cons (IM_VSET, x); | |
438 | } | |
439 | #endif | |
440 | ||
441 | ||
1cc91f1b | 442 | |
0f2d19dd JB |
443 | SCM |
444 | scm_m_and (xorig, env) | |
445 | SCM xorig; | |
446 | SCM env; | |
0f2d19dd JB |
447 | { |
448 | int len = scm_ilength (SCM_CDR (xorig)); | |
449 | ASSYNT (len >= 0, xorig, s_test, "and"); | |
450 | if (len >= 1) | |
451 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); | |
452 | else | |
453 | return SCM_BOOL_T; | |
454 | } | |
455 | ||
456 | ||
1cc91f1b | 457 | |
0f2d19dd JB |
458 | SCM |
459 | scm_m_or (xorig, env) | |
460 | SCM xorig; | |
461 | SCM env; | |
0f2d19dd JB |
462 | { |
463 | int len = scm_ilength (SCM_CDR (xorig)); | |
464 | ASSYNT (len >= 0, xorig, s_test, "or"); | |
465 | if (len >= 1) | |
466 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); | |
467 | else | |
468 | return SCM_BOOL_F; | |
469 | } | |
470 | ||
471 | ||
1cc91f1b | 472 | |
0f2d19dd JB |
473 | SCM |
474 | scm_m_case (xorig, env) | |
475 | SCM xorig; | |
476 | SCM env; | |
0f2d19dd JB |
477 | { |
478 | SCM proc, x = SCM_CDR (xorig); | |
479 | ASSYNT (scm_ilength (x) >= 2, xorig, s_clauses, "case"); | |
480 | while (SCM_NIMP (x = SCM_CDR (x))) | |
481 | { | |
482 | proc = SCM_CAR (x); | |
483 | ASSYNT (scm_ilength (proc) >= 2, xorig, s_clauses, "case"); | |
484 | ASSYNT (scm_ilength (SCM_CAR (proc)) >= 0 || scm_i_else == SCM_CAR (proc), | |
485 | xorig, s_clauses, "case"); | |
486 | } | |
487 | return scm_cons (SCM_IM_CASE, SCM_CDR (xorig)); | |
488 | } | |
489 | ||
490 | ||
1cc91f1b | 491 | |
0f2d19dd JB |
492 | SCM |
493 | scm_m_cond (xorig, env) | |
494 | SCM xorig; | |
495 | SCM env; | |
0f2d19dd JB |
496 | { |
497 | SCM arg1, x = SCM_CDR (xorig); | |
498 | int len = scm_ilength (x); | |
499 | ASSYNT (len >= 1, xorig, s_clauses, "cond"); | |
500 | while (SCM_NIMP (x)) | |
501 | { | |
502 | arg1 = SCM_CAR (x); | |
503 | len = scm_ilength (arg1); | |
504 | ASSYNT (len >= 1, xorig, s_clauses, "cond"); | |
505 | if (scm_i_else == SCM_CAR (arg1)) | |
506 | { | |
507 | ASSYNT (SCM_NULLP (SCM_CDR (x)) && len >= 2, xorig, "bad ELSE clause", "cond"); | |
a23afe53 | 508 | SCM_SETCAR (arg1, SCM_BOOL_T); |
0f2d19dd JB |
509 | } |
510 | if (len >= 2 && scm_i_arrow == SCM_CAR (SCM_CDR (arg1))) | |
511 | ASSYNT (3 == len && SCM_NIMP (SCM_CAR (SCM_CDR (SCM_CDR (arg1)))), | |
512 | xorig, "bad recipient", "cond"); | |
513 | x = SCM_CDR (x); | |
514 | } | |
515 | return scm_cons (SCM_IM_COND, SCM_CDR (xorig)); | |
516 | } | |
517 | ||
518 | ||
1cc91f1b | 519 | |
0f2d19dd JB |
520 | SCM |
521 | scm_m_lambda (xorig, env) | |
522 | SCM xorig; | |
523 | SCM env; | |
0f2d19dd JB |
524 | { |
525 | SCM proc, x = SCM_CDR (xorig); | |
526 | if (scm_ilength (x) < 2) | |
527 | goto badforms; | |
528 | proc = SCM_CAR (x); | |
529 | if SCM_NULLP | |
530 | (proc) goto memlambda; | |
531 | if SCM_IMP | |
532 | (proc) goto badforms; | |
533 | if SCM_SYMBOLP | |
534 | (proc) goto memlambda; | |
535 | if SCM_NCONSP | |
536 | (proc) goto badforms; | |
537 | while SCM_NIMP | |
538 | (proc) | |
539 | { | |
540 | if SCM_NCONSP | |
541 | (proc) | |
542 | if (!SCM_SYMBOLP (proc)) | |
543 | goto badforms; | |
544 | else | |
545 | goto memlambda; | |
546 | if (!(SCM_NIMP (SCM_CAR (proc)) && SCM_SYMBOLP (SCM_CAR (proc)))) | |
547 | goto badforms; | |
548 | proc = SCM_CDR (proc); | |
549 | } | |
550 | if SCM_NNULLP | |
551 | (proc) | |
552 | badforms:scm_wta (xorig, s_formals, "lambda"); | |
553 | memlambda: | |
a23afe53 | 554 | bodycheck (xorig, SCM_CDRLOC (x), "lambda"); |
0f2d19dd JB |
555 | return scm_cons (SCM_IM_LAMBDA, SCM_CDR (xorig)); |
556 | } | |
557 | ||
558 | ||
1cc91f1b | 559 | |
0f2d19dd JB |
560 | SCM |
561 | scm_m_letstar (xorig, env) | |
562 | SCM xorig; | |
563 | SCM env; | |
0f2d19dd JB |
564 | { |
565 | SCM x = SCM_CDR (xorig), arg1, proc, vars = SCM_EOL, *varloc = &vars; | |
566 | int len = scm_ilength (x); | |
567 | ASSYNT (len >= 2, xorig, s_body, "let*"); | |
568 | proc = SCM_CAR (x); | |
569 | ASSYNT (scm_ilength (proc) >= 0, xorig, s_bindings, "let*"); | |
6dbd0af5 | 570 | while SCM_NIMP (proc) |
0f2d19dd JB |
571 | { |
572 | arg1 = SCM_CAR (proc); | |
573 | ASSYNT (2 == scm_ilength (arg1), xorig, s_bindings, "let*"); | |
574 | ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), xorig, s_variable, "let*"); | |
575 | *varloc = scm_cons2 (SCM_CAR (arg1), SCM_CAR (SCM_CDR (arg1)), SCM_EOL); | |
a23afe53 | 576 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
0f2d19dd JB |
577 | proc = SCM_CDR (proc); |
578 | } | |
579 | x = scm_cons (vars, SCM_CDR (x)); | |
a23afe53 | 580 | bodycheck (xorig, SCM_CDRLOC (x), "let*"); |
0f2d19dd JB |
581 | return scm_cons (SCM_IM_LETSTAR, x); |
582 | } | |
583 | ||
584 | /* DO gets the most radically altered syntax | |
585 | (do ((<var1> <init1> <step1>) | |
586 | (<var2> <init2>) | |
587 | ... ) | |
588 | (<test> <return>) | |
589 | <body>) | |
590 | ;; becomes | |
591 | (do_mem (varn ... var2 var1) | |
592 | (<init1> <init2> ... <initn>) | |
593 | (<test> <return>) | |
594 | (<body>) | |
595 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
596 | */ | |
597 | ||
598 | ||
1cc91f1b | 599 | |
0f2d19dd JB |
600 | SCM |
601 | scm_m_do (xorig, env) | |
602 | SCM xorig; | |
603 | SCM env; | |
0f2d19dd JB |
604 | { |
605 | SCM x = SCM_CDR (xorig), arg1, proc; | |
606 | SCM vars = SCM_EOL, inits = SCM_EOL, steps = SCM_EOL; | |
607 | SCM *initloc = &inits, *steploc = &steps; | |
608 | int len = scm_ilength (x); | |
609 | ASSYNT (len >= 2, xorig, s_test, "do"); | |
610 | proc = SCM_CAR (x); | |
611 | ASSYNT (scm_ilength (proc) >= 0, xorig, s_bindings, "do"); | |
612 | while SCM_NIMP | |
613 | (proc) | |
614 | { | |
615 | arg1 = SCM_CAR (proc); | |
616 | len = scm_ilength (arg1); | |
617 | ASSYNT (2 == len || 3 == len, xorig, s_bindings, "do"); | |
618 | ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), xorig, s_variable, "do"); | |
619 | /* vars reversed here, inits and steps reversed at evaluation */ | |
620 | vars = scm_cons (SCM_CAR (arg1), vars); /* variable */ | |
621 | arg1 = SCM_CDR (arg1); | |
622 | *initloc = scm_cons (SCM_CAR (arg1), SCM_EOL); /* init */ | |
a23afe53 | 623 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
624 | arg1 = SCM_CDR (arg1); |
625 | *steploc = scm_cons (SCM_IMP (arg1) ? SCM_CAR (vars) : SCM_CAR (arg1), SCM_EOL); /* step */ | |
a23afe53 | 626 | steploc = SCM_CDRLOC (*steploc); |
0f2d19dd JB |
627 | proc = SCM_CDR (proc); |
628 | } | |
629 | x = SCM_CDR (x); | |
630 | ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, xorig, s_test, "do"); | |
631 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); | |
632 | x = scm_cons2 (vars, inits, x); | |
a23afe53 | 633 | bodycheck (xorig, SCM_CARLOC (SCM_CDR (SCM_CDR (x))), "do"); |
0f2d19dd JB |
634 | return scm_cons (SCM_IM_DO, x); |
635 | } | |
636 | ||
6dbd0af5 MD |
637 | /* evalcar is small version of inline EVALCAR when we don't care about |
638 | * speed | |
639 | */ | |
640 | #define evalcar scm_eval_car | |
0f2d19dd | 641 | |
1cc91f1b JB |
642 | |
643 | static SCM iqq SCM_P ((SCM form, SCM env, int depth)); | |
644 | ||
0f2d19dd JB |
645 | static SCM |
646 | iqq (form, env, depth) | |
647 | SCM form; | |
648 | SCM env; | |
649 | int depth; | |
0f2d19dd JB |
650 | { |
651 | SCM tmp; | |
652 | int edepth = depth; | |
653 | if SCM_IMP | |
654 | (form) return form; | |
655 | if (SCM_VECTORP (form)) | |
656 | { | |
657 | long i = SCM_LENGTH (form); | |
658 | SCM *data = SCM_VELTS (form); | |
659 | tmp = SCM_EOL; | |
660 | for (; --i >= 0;) | |
661 | tmp = scm_cons (data[i], tmp); | |
662 | return scm_vector (iqq (tmp, env, depth)); | |
663 | } | |
664 | if SCM_NCONSP | |
665 | (form) return form; | |
666 | tmp = SCM_CAR (form); | |
667 | if (scm_i_quasiquote == tmp) | |
668 | { | |
669 | depth++; | |
670 | goto label; | |
671 | } | |
672 | if (scm_i_unquote == tmp) | |
673 | { | |
674 | --depth; | |
675 | label: | |
676 | form = SCM_CDR (form); | |
0f2d19dd JB |
677 | SCM_ASSERT (SCM_NIMP (form) && SCM_ECONSP (form) && SCM_NULLP (SCM_CDR (form)), |
678 | form, SCM_ARG1, s_quasiquote); | |
679 | if (0 == depth) | |
680 | return evalcar (form, env); | |
681 | return scm_cons2 (tmp, iqq (SCM_CAR (form), env, depth), SCM_EOL); | |
682 | } | |
683 | if (SCM_NIMP (tmp) && (scm_i_uq_splicing == SCM_CAR (tmp))) | |
684 | { | |
685 | tmp = SCM_CDR (tmp); | |
686 | if (0 == --edepth) | |
687 | return scm_append (scm_cons2 (evalcar (tmp, env), iqq (SCM_CDR (form), env, depth), SCM_EOL)); | |
688 | } | |
689 | return scm_cons (iqq (SCM_CAR (form), env, edepth), iqq (SCM_CDR (form), env, depth)); | |
690 | } | |
691 | ||
692 | /* Here are acros which return values rather than code. */ | |
693 | ||
1cc91f1b | 694 | |
0f2d19dd JB |
695 | SCM |
696 | scm_m_quasiquote (xorig, env) | |
697 | SCM xorig; | |
698 | SCM env; | |
0f2d19dd JB |
699 | { |
700 | SCM x = SCM_CDR (xorig); | |
701 | ASSYNT (scm_ilength (x) == 1, xorig, s_expression, s_quasiquote); | |
702 | return iqq (SCM_CAR (x), env, 1); | |
703 | } | |
704 | ||
1cc91f1b | 705 | |
0f2d19dd JB |
706 | SCM |
707 | scm_m_delay (xorig, env) | |
708 | SCM xorig; | |
709 | SCM env; | |
0f2d19dd JB |
710 | { |
711 | ASSYNT (scm_ilength (xorig) == 2, xorig, s_expression, s_delay); | |
712 | xorig = SCM_CDR (xorig); | |
713 | return scm_makprom (scm_closure (scm_cons2 (SCM_EOL, SCM_CAR (xorig), SCM_CDR (xorig)), | |
714 | env)); | |
715 | } | |
716 | ||
1cc91f1b JB |
717 | |
718 | static SCM env_top_level SCM_P ((SCM env)); | |
719 | ||
0f2d19dd JB |
720 | static SCM |
721 | env_top_level (env) | |
722 | SCM env; | |
0f2d19dd JB |
723 | { |
724 | while (SCM_NIMP(env)) | |
725 | { | |
726 | if (SCM_BOOL_T == scm_procedure_p (SCM_CAR(env))) | |
727 | return SCM_CAR(env); | |
728 | env = SCM_CDR (env); | |
729 | } | |
730 | return SCM_BOOL_F; | |
731 | } | |
732 | ||
1cc91f1b | 733 | |
0f2d19dd JB |
734 | SCM |
735 | scm_m_define (x, env) | |
736 | SCM x; | |
737 | SCM env; | |
0f2d19dd JB |
738 | { |
739 | SCM proc, arg1 = x; | |
740 | x = SCM_CDR (x); | |
741 | /* ASSYNT(SCM_NULLP(env), x, "bad placement", s_define);*/ | |
742 | ASSYNT (scm_ilength (x) >= 2, arg1, s_expression, "define"); | |
743 | proc = SCM_CAR (x); | |
744 | x = SCM_CDR (x); | |
745 | while (SCM_NIMP (proc) && SCM_CONSP (proc)) | |
746 | { /* nested define syntax */ | |
747 | x = scm_cons (scm_cons2 (scm_i_lambda, SCM_CDR (proc), x), SCM_EOL); | |
748 | proc = SCM_CAR (proc); | |
749 | } | |
750 | ASSYNT (SCM_NIMP (proc) && SCM_SYMBOLP (proc), arg1, s_variable, "define"); | |
751 | ASSYNT (1 == scm_ilength (x), arg1, s_expression, "define"); | |
752 | if (SCM_TOP_LEVEL (env)) | |
753 | { | |
754 | x = evalcar (x, env); | |
6dbd0af5 | 755 | #ifdef DEBUG_EXTENSIONS |
70ad4226 | 756 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x) && SCM_CLOSUREP (x)) |
6dbd0af5 MD |
757 | scm_set_procedure_property_x (x, scm_i_name, proc); |
758 | #endif | |
0f2d19dd JB |
759 | arg1 = scm_sym2vcell (proc, env_top_level (env), SCM_BOOL_T); |
760 | #if 0 | |
761 | #ifndef RECKLESS | |
762 | if (SCM_NIMP (SCM_CDR (arg1)) && ((SCM) SCM_SNAME (SCM_CDR (arg1)) == proc) | |
763 | && (SCM_CDR (arg1) != x)) | |
764 | scm_warn ("redefining built-in ", SCM_CHARS (proc)); | |
765 | else | |
766 | #endif | |
767 | if (5 <= scm_verbose && SCM_UNDEFINED != SCM_CDR (arg1)) | |
768 | scm_warn ("redefining ", SCM_CHARS (proc)); | |
0f2d19dd | 769 | #endif |
a23afe53 | 770 | SCM_SETCDR (arg1, x); |
0f2d19dd JB |
771 | #ifdef SICP |
772 | return scm_cons2 (scm_i_quote, SCM_CAR (arg1), SCM_EOL); | |
773 | #else | |
774 | return SCM_UNSPECIFIED; | |
775 | #endif | |
776 | } | |
777 | return scm_cons2 (SCM_IM_DEFINE, proc, x); | |
778 | } | |
6dbd0af5 MD |
779 | |
780 | SCM | |
781 | scm_m_undefine (x, env) | |
782 | SCM x, env; | |
783 | { | |
784 | SCM arg1 = x; | |
785 | x = SCM_CDR (x); | |
786 | ASSYNT (SCM_TOP_LEVEL (env), arg1, "bad placement ", s_undefine); | |
787 | ASSYNT (SCM_NIMP (x) && SCM_CONSP (x) && SCM_CDR (x) == SCM_EOL, | |
788 | arg1, s_expression, s_undefine); | |
789 | x = SCM_CAR (x); | |
790 | ASSYNT (SCM_NIMP (x) && SCM_SYMBOLP (x), arg1, s_variable, s_undefine); | |
791 | arg1 = scm_sym2vcell (x, env_top_level (env), SCM_BOOL_F); | |
792 | ASSYNT (SCM_NFALSEP (arg1) && !SCM_UNBNDP (SCM_CDR (arg1)), | |
793 | x, "variable already unbound ", s_undefine); | |
794 | #if 0 | |
795 | #ifndef RECKLESS | |
796 | if (SCM_NIMP (SCM_CDR (arg1)) && ((SCM) SCM_SNAME (SCM_CDR (arg1)) == x)) | |
797 | scm_warn ("undefining built-in ", SCM_CHARS (x)); | |
798 | else | |
799 | #endif | |
800 | if (5 <= scm_verbose && SCM_UNDEFINED != SCM_CDR (arg1)) | |
801 | scm_warn ("redefining ", SCM_CHARS (x)); | |
802 | #endif | |
a23afe53 | 803 | SCM_SETCDR (arg1, SCM_UNDEFINED); |
6dbd0af5 MD |
804 | #ifdef SICP |
805 | return SCM_CAR (arg1); | |
806 | #else | |
807 | return SCM_UNSPECIFIED; | |
808 | #endif | |
809 | } | |
810 | ||
0f2d19dd JB |
811 | /* end of acros */ |
812 | ||
1cc91f1b | 813 | |
0f2d19dd JB |
814 | SCM |
815 | scm_m_letrec (xorig, env) | |
816 | SCM xorig; | |
817 | SCM env; | |
0f2d19dd JB |
818 | { |
819 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
820 | char *what = SCM_CHARS (SCM_CAR (xorig)); | |
821 | SCM x = cdrx, proc, arg1; /* structure traversers */ | |
822 | SCM vars = SCM_EOL, inits = SCM_EOL, *initloc = &inits; | |
823 | ||
824 | ASRTSYNTAX (scm_ilength (x) >= 2, s_body); | |
825 | proc = SCM_CAR (x); | |
826 | if SCM_NULLP | |
827 | (proc) return scm_m_letstar (xorig, env); /* null binding, let* faster */ | |
828 | ASRTSYNTAX (scm_ilength (proc) >= 1, s_bindings); | |
829 | do | |
830 | { | |
831 | /* vars scm_list reversed here, inits reversed at evaluation */ | |
832 | arg1 = SCM_CAR (proc); | |
833 | ASRTSYNTAX (2 == scm_ilength (arg1), s_bindings); | |
834 | ASRTSYNTAX (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), s_variable); | |
835 | vars = scm_cons (SCM_CAR (arg1), vars); | |
836 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); | |
a23afe53 | 837 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
838 | } |
839 | while SCM_NIMP | |
840 | (proc = SCM_CDR (proc)); | |
841 | cdrx = scm_cons2 (vars, inits, SCM_CDR (x)); | |
a23afe53 | 842 | bodycheck (xorig, SCM_CDRLOC (SCM_CDR (cdrx)), what); |
0f2d19dd JB |
843 | return scm_cons (SCM_IM_LETREC, cdrx); |
844 | } | |
845 | ||
1cc91f1b | 846 | |
0f2d19dd JB |
847 | SCM |
848 | scm_m_let (xorig, env) | |
849 | SCM xorig; | |
850 | SCM env; | |
0f2d19dd JB |
851 | { |
852 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
853 | SCM x = cdrx, proc, arg1, name; /* structure traversers */ | |
854 | SCM vars = SCM_EOL, inits = SCM_EOL, *varloc = &vars, *initloc = &inits; | |
855 | ||
856 | ASSYNT (scm_ilength (x) >= 2, xorig, s_body, "let"); | |
857 | proc = SCM_CAR (x); | |
858 | if (SCM_NULLP (proc) | |
859 | || (SCM_NIMP (proc) && SCM_CONSP (proc) | |
860 | && SCM_NIMP (SCM_CAR (proc)) && SCM_CONSP (SCM_CAR (proc)) && SCM_NULLP (SCM_CDR (proc)))) | |
861 | return scm_m_letstar (xorig, env); /* null or single binding, let* is faster */ | |
862 | ASSYNT (SCM_NIMP (proc), xorig, s_bindings, "let"); | |
863 | if (SCM_CONSP (proc)) /* plain let, proc is <bindings> */ | |
864 | return scm_cons (SCM_IM_LET, SCM_CDR (scm_m_letrec (xorig, env))); | |
865 | if (!SCM_SYMBOLP (proc)) | |
866 | scm_wta (xorig, s_bindings, "let"); /* bad let */ | |
867 | name = proc; /* named let, build equiv letrec */ | |
868 | x = SCM_CDR (x); | |
869 | ASSYNT (scm_ilength (x) >= 2, xorig, s_body, "let"); | |
870 | proc = SCM_CAR (x); /* bindings scm_list */ | |
871 | ASSYNT (scm_ilength (proc) >= 0, xorig, s_bindings, "let"); | |
872 | while SCM_NIMP | |
873 | (proc) | |
874 | { /* vars and inits both in order */ | |
875 | arg1 = SCM_CAR (proc); | |
876 | ASSYNT (2 == scm_ilength (arg1), xorig, s_bindings, "let"); | |
877 | ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), xorig, s_variable, "let"); | |
878 | *varloc = scm_cons (SCM_CAR (arg1), SCM_EOL); | |
a23afe53 | 879 | varloc = SCM_CDRLOC (*varloc); |
0f2d19dd | 880 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 881 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
882 | proc = SCM_CDR (proc); |
883 | } | |
884 | return | |
885 | scm_m_letrec (scm_cons2 (scm_i_let, | |
886 | scm_cons (scm_cons2 (name, scm_cons2 (scm_i_lambda, vars, SCM_CDR (x)), SCM_EOL), SCM_EOL), | |
887 | scm_acons (name, inits, SCM_EOL)), /* body */ | |
888 | env); | |
889 | } | |
890 | ||
891 | ||
1cc91f1b | 892 | |
0f2d19dd JB |
893 | SCM |
894 | scm_m_apply (xorig, env) | |
895 | SCM xorig; | |
896 | SCM env; | |
0f2d19dd JB |
897 | { |
898 | ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, xorig, s_expression, "@apply"); | |
899 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); | |
900 | } | |
901 | ||
e2806c10 | 902 | #define s_atcall_cc (SCM_ISYMCHARS(SCM_IM_CONT)+1) |
0f2d19dd | 903 | |
1cc91f1b | 904 | |
0f2d19dd JB |
905 | SCM |
906 | scm_m_cont (xorig, env) | |
907 | SCM xorig; | |
908 | SCM env; | |
0f2d19dd JB |
909 | { |
910 | ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, xorig, s_expression, "@call-with-current-continuation"); | |
911 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); | |
912 | } | |
913 | ||
6dbd0af5 MD |
914 | /* scm_unmemocopy takes a memoized expression together with its |
915 | * environment and rewrites it to its original form. Thus, it is the | |
916 | * inversion of the rewrite rules above. The procedure is not | |
917 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
918 | * code of a closure, in scm_procedure_source, in display_frame when |
919 | * generating the source for a stackframe in a backtrace, and in | |
920 | * display_expression. | |
6dbd0af5 MD |
921 | */ |
922 | ||
1cc91f1b JB |
923 | static SCM unmemocopy SCM_P ((SCM x, SCM env)); |
924 | ||
6dbd0af5 MD |
925 | static SCM |
926 | unmemocopy (x, env) | |
927 | SCM x; | |
928 | SCM env; | |
6dbd0af5 MD |
929 | { |
930 | SCM ls, z; | |
931 | #ifdef DEBUG_EXTENSIONS | |
932 | SCM p; | |
933 | #endif | |
934 | if (SCM_NCELLP (x) || SCM_NECONSP (x)) | |
935 | return x; | |
936 | #ifdef DEBUG_EXTENSIONS | |
937 | p = scm_whash_lookup (scm_source_whash, x); | |
938 | #endif | |
939 | switch (SCM_TYP7 (x)) | |
940 | { | |
941 | case (127 & SCM_IM_AND): | |
942 | ls = z = scm_cons (scm_i_and, SCM_UNSPECIFIED); | |
943 | break; | |
944 | case (127 & SCM_IM_BEGIN): | |
945 | ls = z = scm_cons (scm_i_begin, SCM_UNSPECIFIED); | |
946 | break; | |
947 | case (127 & SCM_IM_CASE): | |
948 | ls = z = scm_cons (scm_i_case, SCM_UNSPECIFIED); | |
949 | break; | |
950 | case (127 & SCM_IM_COND): | |
951 | ls = z = scm_cons (scm_i_cond, SCM_UNSPECIFIED); | |
952 | break; | |
953 | case (127 & SCM_IM_DO): | |
954 | ls = scm_cons (scm_i_do, SCM_UNSPECIFIED); | |
955 | goto transform; | |
956 | case (127 & SCM_IM_IF): | |
957 | ls = z = scm_cons (scm_i_if, SCM_UNSPECIFIED); | |
958 | break; | |
959 | case (127 & SCM_IM_LET): | |
960 | ls = scm_cons (scm_i_let, SCM_UNSPECIFIED); | |
961 | goto transform; | |
962 | case (127 & SCM_IM_LETREC): | |
963 | { | |
964 | SCM f, v, e, s; | |
965 | ls = scm_cons (scm_i_letrec, SCM_UNSPECIFIED); | |
966 | transform: | |
967 | x = SCM_CDR (x); | |
968 | f = v = SCM_CAR (x); | |
969 | x = SCM_CDR (x); | |
e2806c10 | 970 | z = EXTEND_ENV (f, SCM_EOL, env); |
6dbd0af5 MD |
971 | e = scm_reverse (unmemocopy (SCM_CAR (x), |
972 | SCM_CAR (ls) == scm_i_letrec ? z : env)); | |
973 | env = z; | |
974 | s = SCM_CAR (ls) == scm_i_do | |
975 | ? scm_reverse (unmemocopy (SCM_CDR (SCM_CDR (SCM_CDR (x))), env)) | |
976 | : f; | |
977 | z = SCM_EOL; | |
978 | do | |
979 | { | |
980 | z = scm_acons (SCM_CAR (v), | |
981 | scm_cons (SCM_CAR (e), | |
982 | SCM_CAR (s) == SCM_CAR (v) | |
983 | ? SCM_EOL | |
984 | : scm_cons (SCM_CAR (s), SCM_EOL)), | |
985 | z); | |
986 | v = SCM_CDR (v); | |
987 | e = SCM_CDR (e); | |
988 | s = SCM_CDR (s); | |
989 | } | |
990 | while SCM_NIMP (v); | |
a23afe53 MD |
991 | z = scm_cons (z, SCM_UNSPECIFIED); |
992 | SCM_SETCDR (ls, z); | |
6dbd0af5 MD |
993 | if (SCM_CAR (ls) == scm_i_do) |
994 | { | |
995 | x = SCM_CDR (x); | |
a23afe53 | 996 | SCM_SETCDR (z, scm_cons (unmemocopy (SCM_CAR (x), env), |
6dbd0af5 | 997 | SCM_UNSPECIFIED)); |
a23afe53 MD |
998 | z = SCM_CDR (z); |
999 | x = (SCM) (SCM_CARLOC (SCM_CDR (x)) - 1); | |
6dbd0af5 MD |
1000 | } |
1001 | break; | |
1002 | } | |
1003 | case (127 & SCM_IM_LETSTAR): | |
1004 | { | |
1005 | SCM b, y; | |
1006 | x = SCM_CDR (x); | |
1007 | b = SCM_CAR (x); | |
1008 | y = SCM_EOL; | |
1009 | if SCM_IMP (b) | |
1010 | { | |
e2806c10 | 1011 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1012 | goto letstar; |
1013 | } | |
1014 | y = z = scm_acons (SCM_CAR (b), | |
1015 | unmemocar ( | |
1016 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), | |
1017 | SCM_UNSPECIFIED); | |
e2806c10 | 1018 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1019 | b = SCM_CDR (SCM_CDR (b)); |
1020 | if (SCM_IMP (b)) | |
1021 | { | |
1022 | SCM_SETCDR (y, SCM_EOL); | |
1023 | ls = scm_cons (scm_i_let, z = scm_cons (y, SCM_UNSPECIFIED)); | |
1024 | break; | |
1025 | } | |
1026 | do | |
1027 | { | |
a23afe53 MD |
1028 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1029 | unmemocar ( | |
6dbd0af5 | 1030 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), |
a23afe53 MD |
1031 | SCM_UNSPECIFIED)); |
1032 | z = SCM_CDR (z); | |
e2806c10 | 1033 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1034 | b = SCM_CDR (SCM_CDR (b)); |
1035 | } | |
1036 | while SCM_NIMP (b); | |
a23afe53 | 1037 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 MD |
1038 | letstar: |
1039 | ls = scm_cons (scm_i_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); | |
1040 | break; | |
1041 | } | |
1042 | case (127 & SCM_IM_OR): | |
1043 | ls = z = scm_cons (scm_i_or, SCM_UNSPECIFIED); | |
1044 | break; | |
1045 | case (127 & SCM_IM_LAMBDA): | |
1046 | x = SCM_CDR (x); | |
1047 | ls = scm_cons (scm_i_lambda, | |
1048 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED)); | |
e2806c10 | 1049 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 MD |
1050 | break; |
1051 | case (127 & SCM_IM_QUOTE): | |
1052 | ls = z = scm_cons (scm_i_quote, SCM_UNSPECIFIED); | |
1053 | break; | |
1054 | case (127 & SCM_IM_SET): | |
1055 | ls = z = scm_cons (scm_i_set, SCM_UNSPECIFIED); | |
1056 | break; | |
1057 | case (127 & SCM_IM_DEFINE): | |
1058 | { | |
1059 | SCM n; | |
1060 | x = SCM_CDR (x); | |
1061 | ls = scm_cons (scm_i_define, | |
1062 | z = scm_cons (n = SCM_CAR (x), SCM_UNSPECIFIED)); | |
1063 | if (SCM_NNULLP (env)) | |
a23afe53 | 1064 | SCM_SETCAR (SCM_CAR (env), scm_cons (n, SCM_CAR (SCM_CAR (env)))); |
6dbd0af5 MD |
1065 | break; |
1066 | } | |
1067 | case (127 & SCM_MAKISYM (0)): | |
1068 | z = SCM_CAR (x); | |
1069 | if (!SCM_ISYMP (z)) | |
1070 | goto unmemo; | |
1071 | switch SCM_ISYMNUM (z) | |
1072 | { | |
1073 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
1074 | ls = z = scm_cons (scm_i_atapply, SCM_UNSPECIFIED); | |
1075 | goto loop; | |
1076 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
1077 | ls = z = scm_cons (scm_i_atcall_cc, SCM_UNSPECIFIED); | |
1078 | goto loop; | |
1079 | default: | |
fa888178 | 1080 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1081 | } |
1082 | unmemo: | |
1083 | default: | |
1084 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1085 | SCM_UNSPECIFIED), | |
1086 | env); | |
1087 | } | |
1088 | loop: | |
1089 | while (SCM_CELLP (x = SCM_CDR (x)) && SCM_ECONSP (x)) | |
a23afe53 MD |
1090 | { |
1091 | SCM_SETCDR (z, unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1092 | SCM_UNSPECIFIED), | |
1093 | env)); | |
1094 | z = SCM_CDR (z); | |
1095 | } | |
1096 | SCM_SETCDR (z, x); | |
6dbd0af5 MD |
1097 | #ifdef DEBUG_EXTENSIONS |
1098 | if (SCM_NFALSEP (p)) | |
1099 | scm_whash_insert (scm_source_whash, ls, p); | |
1100 | #endif | |
1101 | return ls; | |
1102 | } | |
1103 | ||
1cc91f1b | 1104 | |
6dbd0af5 MD |
1105 | SCM |
1106 | scm_unmemocopy (x, env) | |
1107 | SCM x; | |
1108 | SCM env; | |
6dbd0af5 MD |
1109 | { |
1110 | if (SCM_NNULLP (env)) | |
1111 | /* Make a copy of the lowest frame to protect it from | |
1112 | modifications by SCM_IM_DEFINE */ | |
1113 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1114 | else | |
1115 | return unmemocopy (x, env); | |
1116 | } | |
1117 | ||
0f2d19dd | 1118 | #ifndef RECKLESS |
1cc91f1b | 1119 | |
0f2d19dd JB |
1120 | int |
1121 | scm_badargsp (formals, args) | |
1122 | SCM formals; | |
1123 | SCM args; | |
0f2d19dd JB |
1124 | { |
1125 | while SCM_NIMP | |
1126 | (formals) | |
1127 | { | |
1128 | if SCM_NCONSP | |
1129 | (formals) return 0; | |
1130 | if SCM_IMP | |
1131 | (args) return 1; | |
1132 | formals = SCM_CDR (formals); | |
1133 | args = SCM_CDR (args); | |
1134 | } | |
1135 | return SCM_NNULLP (args) ? 1 : 0; | |
1136 | } | |
1137 | #endif | |
1138 | ||
1139 | ||
1140 | \f | |
1141 | long scm_tc16_macro; | |
1142 | ||
1cc91f1b | 1143 | |
6dbd0af5 MD |
1144 | SCM |
1145 | scm_eval_args (l, env) | |
1146 | SCM l; | |
1147 | SCM env; | |
6dbd0af5 MD |
1148 | { |
1149 | SCM res = SCM_EOL, *lloc = &res; | |
1150 | while (SCM_NIMP (l)) | |
1151 | { | |
1152 | *lloc = scm_cons (EVALCAR (l, env), SCM_EOL); | |
a23afe53 | 1153 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1154 | l = SCM_CDR (l); |
1155 | } | |
1156 | return res; | |
1157 | } | |
c4ac4d88 JB |
1158 | |
1159 | ||
1160 | /* The SCM_CEVAL and SCM_APPLY functions use this function instead of | |
1161 | calling setjmp directly, to make sure that local variables don't | |
1162 | have their values clobbered by a longjmp. | |
1163 | ||
1164 | According to Harbison & Steele, "Automatic variables local to the | |
1165 | function containing setjmp are guaranteed to have their correct | |
1166 | value in ANSI C only if they have a volatile-qualified type or if | |
1167 | their values were not changed between the original call to setjmp | |
1168 | and the corresponding longjmp call." | |
1169 | ||
1170 | SCM_CEVAL and SCM_APPLY are too complex for me to see how to meet | |
1171 | the second condition, and making x and env volatile would be a | |
1172 | speed problem, so we'll just trivially meet the first, by having no | |
1173 | "automatic variables local to the function containing setjmp." */ | |
30000774 JB |
1174 | |
1175 | /* Actually, this entire approach is bogus, because setjmp ends up | |
1176 | capturing the stack frame of the wrapper function, which then | |
1177 | returns, rendering the jump buffer invalid. Duh. Gotta find a | |
1178 | better way... -JimB */ | |
c75e83b7 | 1179 | #define safe_setjmp(x) setjmp (x) |
c4ac4d88 | 1180 | static int |
c75e83b7 | 1181 | unsafe_setjmp (jmp_buf env) |
c4ac4d88 JB |
1182 | { |
1183 | /* I think ANSI requires us to write the function this way, instead | |
1184 | of just saying "return setjmp (env)". Maybe I'm being silly. | |
1185 | See Harbison & Steele, third edition, p. 353. */ | |
1186 | int val; | |
1187 | val = setjmp (env); | |
1188 | return val; | |
1189 | } | |
1190 | ||
1191 | ||
0f2d19dd JB |
1192 | #endif /* !DEVAL */ |
1193 | ||
6dbd0af5 MD |
1194 | |
1195 | /* SECTION: This code is specific for the debugging support. One | |
1196 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1197 | * defined. | |
1198 | */ | |
1199 | ||
1200 | #ifndef DEVAL | |
1201 | ||
1202 | #define SCM_APPLY scm_apply | |
1203 | #define PREP_APPLY(proc, args) | |
1204 | #define ENTER_APPLY | |
1205 | #define RETURN(x) return x; | |
b7ff98dd MD |
1206 | #ifdef STACK_CHECKING |
1207 | #ifndef NO_CEVAL_STACK_CHECKING | |
1208 | #define EVAL_STACK_CHECKING | |
1209 | #endif | |
6dbd0af5 MD |
1210 | #endif |
1211 | ||
1212 | #else /* !DEVAL */ | |
1213 | ||
0f2d19dd JB |
1214 | #undef SCM_CEVAL |
1215 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1216 | #undef SCM_APPLY | |
1217 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1218 | #undef PREP_APPLY |
1219 | #define PREP_APPLY(p, l) \ | |
1220 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1221 | #undef ENTER_APPLY | |
1222 | #define ENTER_APPLY \ | |
1223 | {\ | |
b7ff98dd | 1224 | SCM_SET_ARGSREADY (debug);\ |
6dbd0af5 | 1225 | if (CHECK_APPLY)\ |
b7ff98dd | 1226 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1227 | {\ |
b7ff98dd | 1228 | SCM tmp, tail = SCM_TRACED_FRAME_P (debug) ? SCM_BOOL_T : SCM_BOOL_F;\ |
c6a4fbce MD |
1229 | SCM_SET_TRACED_FRAME (debug); \ |
1230 | SCM_APPLY_FRAME_P = 0; \ | |
1231 | SCM_TRACE_P = 0; \ | |
1232 | SCM_RESET_DEBUG_MODE; \ | |
b7ff98dd | 1233 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1234 | {\ |
c0ab1b8d | 1235 | tmp = scm_make_debugobj (&debug);\ |
6dbd0af5 MD |
1236 | scm_ithrow (scm_i_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
1237 | }\ | |
1238 | else\ | |
1239 | {\ | |
1240 | scm_make_cont (&tmp);\ | |
c4ac4d88 | 1241 | if (!safe_setjmp (SCM_JMPBUF (tmp)))\ |
6dbd0af5 MD |
1242 | scm_ithrow (scm_i_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
1243 | }\ | |
1244 | }\ | |
1245 | } | |
0f2d19dd JB |
1246 | #undef RETURN |
1247 | #define RETURN(e) {proc = (e); goto exit;} | |
b7ff98dd MD |
1248 | #ifdef STACK_CHECKING |
1249 | #ifndef EVAL_STACK_CHECKING | |
1250 | #define EVAL_STACK_CHECKING | |
1251 | #endif | |
6dbd0af5 MD |
1252 | #endif |
1253 | ||
1254 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1255 | * *fixme*: Although efficiency is important here, this state variable | |
1256 | * should probably not be a global. It should be related to the | |
1257 | * current repl. | |
1258 | */ | |
1259 | ||
1cc91f1b JB |
1260 | |
1261 | SCM (*scm_ceval_ptr) SCM_P ((SCM x, SCM env)); | |
0f2d19dd | 1262 | |
1646d37b | 1263 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1264 | * information stack frame. It is accessed very often from the |
1265 | * debugging evaluator, so it should probably not be indirectly | |
1266 | * addressed. Better to save and restore it from the current root at | |
1267 | * any stack swaps. | |
1268 | */ | |
1269 | ||
1646d37b MD |
1270 | #ifndef USE_THREADS |
1271 | scm_debug_frame *scm_last_debug_frame; | |
1272 | #endif | |
6dbd0af5 MD |
1273 | |
1274 | /* scm_debug_eframe_size is the number of slots available for pseudo | |
1275 | * stack frames at each real stack frame. | |
1276 | */ | |
1277 | ||
1278 | int scm_debug_eframe_size; | |
1279 | ||
b7ff98dd | 1280 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 MD |
1281 | |
1282 | scm_option scm_debug_opts[] = { | |
b7ff98dd MD |
1283 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1284 | "*Flyweight representation of the stack at traps." }, | |
1285 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1286 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1287 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1288 | "Record procedure names at definition." }, | |
1289 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1290 | "Display backtrace in anti-chronological order." }, | |
4e646a03 MD |
1291 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1292 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1293 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1294 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1295 | "Maximal number of stored backtrace frames." }, | |
1296 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1297 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1298 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
b7ff98dd | 1299 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (0 = no check)." } |
6dbd0af5 MD |
1300 | }; |
1301 | ||
1302 | scm_option scm_evaluator_trap_table[] = { | |
b7ff98dd MD |
1303 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1304 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
1305 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." } | |
6dbd0af5 MD |
1306 | }; |
1307 | ||
1308 | SCM | |
1309 | scm_deval_args (l, env, lloc) | |
1310 | SCM l, env, *lloc; | |
0f2d19dd | 1311 | { |
6dbd0af5 | 1312 | SCM *res = lloc; |
0f2d19dd JB |
1313 | while (SCM_NIMP (l)) |
1314 | { | |
1315 | *lloc = scm_cons (EVALCAR (l, env), SCM_EOL); | |
a23afe53 | 1316 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1317 | l = SCM_CDR (l); |
1318 | } | |
6dbd0af5 | 1319 | return *res; |
0f2d19dd JB |
1320 | } |
1321 | ||
6dbd0af5 MD |
1322 | #endif /* !DEVAL */ |
1323 | ||
1324 | ||
1325 | /* SECTION: Some local definitions for the evaluator. | |
1326 | */ | |
1327 | ||
1328 | #ifndef DEVAL | |
1329 | #ifdef SCM_FLOATS | |
1330 | #define CHECK_EQVISH(A,B) (((A) == (B)) || (SCM_NFALSEP (scm_eqv_p ((A), (B))))) | |
1331 | #else | |
1332 | #define CHECK_EQVISH(A,B) ((A) == (B)) | |
1333 | #endif | |
1334 | #endif /* DEVAL */ | |
1335 | ||
399dedcc | 1336 | #define BUILTIN_RPASUBR /* Handle rpsubrs and asubrs without calling apply */ |
6dbd0af5 MD |
1337 | |
1338 | /* SECTION: This is the evaluator. Like any real monster, it has | |
1339 | * three heads. This code is compiled twice. | |
1340 | */ | |
1341 | ||
0f2d19dd | 1342 | #if 0 |
1cc91f1b | 1343 | |
0f2d19dd JB |
1344 | SCM |
1345 | scm_ceval (x, env) | |
1346 | SCM x; | |
1347 | SCM env; | |
0f2d19dd JB |
1348 | {} |
1349 | #endif | |
1350 | #if 0 | |
1cc91f1b | 1351 | |
0f2d19dd JB |
1352 | SCM |
1353 | scm_deval (x, env) | |
1354 | SCM x; | |
1355 | SCM env; | |
0f2d19dd JB |
1356 | {} |
1357 | #endif | |
1358 | ||
1cc91f1b | 1359 | |
6dbd0af5 | 1360 | SCM |
0f2d19dd JB |
1361 | SCM_CEVAL (x, env) |
1362 | SCM x; | |
1363 | SCM env; | |
1364 | { | |
1365 | union | |
1366 | { | |
1367 | SCM *lloc; | |
1368 | SCM arg1; | |
1369 | } t; | |
6dbd0af5 MD |
1370 | SCM proc, arg2; |
1371 | #ifdef DEVAL | |
c0ab1b8d JB |
1372 | scm_debug_frame debug; |
1373 | scm_debug_info *debug_info_end; | |
1646d37b | 1374 | debug.prev = scm_last_debug_frame; |
6dbd0af5 | 1375 | debug.status = scm_debug_eframe_size; |
c0ab1b8d JB |
1376 | debug.vect = (scm_debug_info *) alloca (scm_debug_eframe_size |
1377 | * sizeof (debug.vect[0])); | |
1378 | debug.info = debug.vect; | |
1379 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1380 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1381 | #endif |
b7ff98dd MD |
1382 | #ifdef EVAL_STACK_CHECKING |
1383 | if (SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc) | |
1384 | && scm_stack_checking_enabled_p) | |
6dbd0af5 | 1385 | { |
b7ff98dd | 1386 | #ifdef DEVAL |
6dbd0af5 MD |
1387 | debug.info->e.exp = x; |
1388 | debug.info->e.env = env; | |
b7ff98dd | 1389 | #endif |
6dbd0af5 MD |
1390 | scm_report_stack_overflow (); |
1391 | } | |
1392 | #endif | |
1393 | #ifdef DEVAL | |
1394 | goto start; | |
1395 | #endif | |
1396 | loopnoap: | |
1397 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1398 | loop: | |
1399 | #ifdef DEVAL | |
b7ff98dd MD |
1400 | SCM_CLEAR_ARGSREADY (debug); |
1401 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1402 | --debug.info; |
c0ab1b8d | 1403 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1404 | { |
b7ff98dd | 1405 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1406 | debug.info -= 2; |
1407 | } | |
1408 | start: | |
1409 | debug.info->e.exp = x; | |
1410 | debug.info->e.env = env; | |
1411 | if (CHECK_ENTRY) | |
b7ff98dd | 1412 | if (SCM_ENTER_FRAME_P || (SCM_BREAKPOINTS_P && SRCBRKP (x))) |
6dbd0af5 | 1413 | { |
b7ff98dd MD |
1414 | SCM tail = SCM_TAILRECP (debug) ? SCM_BOOL_T : SCM_BOOL_F; |
1415 | SCM_SET_TAILREC (debug); | |
1416 | SCM_ENTER_FRAME_P = 0; | |
1417 | SCM_RESET_DEBUG_MODE; | |
1418 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 1419 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
1420 | else |
1421 | { | |
1422 | scm_make_cont (&t.arg1); | |
c4ac4d88 | 1423 | if (safe_setjmp (SCM_JMPBUF (t.arg1))) |
6dbd0af5 MD |
1424 | { |
1425 | x = SCM_THROW_VALUE (t.arg1); | |
1426 | if (SCM_IMP (x)) | |
1427 | { | |
1428 | RETURN (x); | |
1429 | } | |
1430 | else | |
1431 | /* This gives the possibility for the debugger to | |
1432 | modify the source expression before evaluation. */ | |
1433 | goto dispatch; | |
1434 | } | |
1435 | } | |
1436 | scm_ithrow (scm_i_enter_frame, | |
1437 | scm_cons2 (t.arg1, tail, | |
1438 | scm_cons (scm_unmemocopy (x, env), SCM_EOL)), | |
1439 | 0); | |
1440 | } | |
1441 | dispatch: | |
1442 | #endif | |
0f2d19dd | 1443 | SCM_ASYNC_TICK; |
0f2d19dd JB |
1444 | switch (SCM_TYP7 (x)) |
1445 | { | |
1446 | case scm_tcs_symbols: | |
1447 | /* Only happens when called at top level. | |
1448 | */ | |
1449 | x = scm_cons (x, SCM_UNDEFINED); | |
1450 | goto retval; | |
1451 | ||
1452 | case (127 & SCM_IM_AND): | |
1453 | x = SCM_CDR (x); | |
1454 | t.arg1 = x; | |
1455 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1456 | if (SCM_FALSEP (EVALCAR (x, env))) | |
1457 | { | |
1458 | RETURN (SCM_BOOL_F); | |
1459 | } | |
1460 | else | |
1461 | x = t.arg1; | |
6dbd0af5 | 1462 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1463 | goto carloop; |
1464 | ||
1465 | case (127 & SCM_IM_BEGIN): | |
6dbd0af5 MD |
1466 | cdrxnoap: |
1467 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
0f2d19dd JB |
1468 | cdrxbegin: |
1469 | x = SCM_CDR (x); | |
1470 | ||
1471 | begin: | |
1472 | t.arg1 = x; | |
1473 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1474 | { | |
1475 | SIDEVAL (SCM_CAR (x), env); | |
1476 | x = t.arg1; | |
1477 | } | |
1478 | ||
1479 | carloop: /* scm_eval car of last form in list */ | |
1480 | if (SCM_NCELLP (SCM_CAR (x))) | |
1481 | { | |
1482 | x = SCM_CAR (x); | |
6dbd0af5 | 1483 | RETURN (SCM_IMP (x) ? EVALIM (x, env) : SCM_GLOC_VAL (x)) |
0f2d19dd JB |
1484 | } |
1485 | ||
1486 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
1487 | { | |
1488 | retval: | |
6dbd0af5 | 1489 | RETURN (*scm_lookupcar (x, env)) |
0f2d19dd JB |
1490 | } |
1491 | ||
1492 | x = SCM_CAR (x); | |
1493 | goto loop; /* tail recurse */ | |
1494 | ||
1495 | ||
1496 | case (127 & SCM_IM_CASE): | |
1497 | x = SCM_CDR (x); | |
1498 | t.arg1 = EVALCAR (x, env); | |
1499 | while (SCM_NIMP (x = SCM_CDR (x))) | |
1500 | { | |
1501 | proc = SCM_CAR (x); | |
1502 | if (scm_i_else == SCM_CAR (proc)) | |
1503 | { | |
1504 | x = SCM_CDR (proc); | |
6dbd0af5 | 1505 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1506 | goto begin; |
1507 | } | |
1508 | proc = SCM_CAR (proc); | |
1509 | while (SCM_NIMP (proc)) | |
1510 | { | |
1511 | if (CHECK_EQVISH (SCM_CAR (proc), t.arg1)) | |
1512 | { | |
1513 | x = SCM_CDR (SCM_CAR (x)); | |
6dbd0af5 | 1514 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1515 | goto begin; |
1516 | } | |
1517 | proc = SCM_CDR (proc); | |
1518 | } | |
1519 | } | |
6dbd0af5 | 1520 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
1521 | |
1522 | ||
1523 | case (127 & SCM_IM_COND): | |
1524 | while (SCM_NIMP (x = SCM_CDR (x))) | |
1525 | { | |
1526 | proc = SCM_CAR (x); | |
1527 | t.arg1 = EVALCAR (proc, env); | |
1528 | if (SCM_NFALSEP (t.arg1)) | |
1529 | { | |
1530 | x = SCM_CDR (proc); | |
6dbd0af5 | 1531 | if SCM_NULLP (x) |
0f2d19dd | 1532 | { |
6dbd0af5 | 1533 | RETURN (t.arg1) |
0f2d19dd JB |
1534 | } |
1535 | if (scm_i_arrow != SCM_CAR (x)) | |
6dbd0af5 MD |
1536 | { |
1537 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1538 | goto begin; | |
1539 | } | |
0f2d19dd JB |
1540 | proc = SCM_CDR (x); |
1541 | proc = EVALCAR (proc, env); | |
1542 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
1543 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
1544 | ENTER_APPLY; | |
0f2d19dd JB |
1545 | goto evap1; |
1546 | } | |
1547 | } | |
6dbd0af5 | 1548 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
1549 | |
1550 | ||
1551 | case (127 & SCM_IM_DO): | |
1552 | x = SCM_CDR (x); | |
1553 | proc = SCM_CAR (SCM_CDR (x)); /* inits */ | |
1554 | t.arg1 = SCM_EOL; /* values */ | |
1555 | while (SCM_NIMP (proc)) | |
1556 | { | |
1557 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
1558 | proc = SCM_CDR (proc); | |
1559 | } | |
e2806c10 | 1560 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd JB |
1561 | x = SCM_CDR (SCM_CDR (x)); |
1562 | while (proc = SCM_CAR (x), SCM_FALSEP (EVALCAR (proc, env))) | |
1563 | { | |
1564 | for (proc = SCM_CAR (SCM_CDR (x)); SCM_NIMP (proc); proc = SCM_CDR (proc)) | |
1565 | { | |
1566 | t.arg1 = SCM_CAR (proc); /* body */ | |
1567 | SIDEVAL (t.arg1, env); | |
1568 | } | |
1569 | for (t.arg1 = SCM_EOL, proc = SCM_CDR (SCM_CDR (x)); SCM_NIMP (proc); proc = SCM_CDR (proc)) | |
1570 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); /* steps */ | |
e2806c10 | 1571 | env = EXTEND_ENV (SCM_CAR (SCM_CAR (env)), t.arg1, SCM_CDR (env)); |
0f2d19dd JB |
1572 | } |
1573 | x = SCM_CDR (proc); | |
1574 | if (SCM_NULLP (x)) | |
6dbd0af5 MD |
1575 | RETURN (SCM_UNSPECIFIED); |
1576 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
0f2d19dd JB |
1577 | goto begin; |
1578 | ||
1579 | ||
1580 | case (127 & SCM_IM_IF): | |
1581 | x = SCM_CDR (x); | |
1582 | if (SCM_NFALSEP (EVALCAR (x, env))) | |
1583 | x = SCM_CDR (x); | |
1584 | else if (SCM_IMP (x = SCM_CDR (SCM_CDR (x)))) | |
1585 | { | |
1586 | RETURN (SCM_UNSPECIFIED); | |
1587 | } | |
6dbd0af5 | 1588 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1589 | goto carloop; |
1590 | ||
1591 | ||
1592 | case (127 & SCM_IM_LET): | |
1593 | x = SCM_CDR (x); | |
1594 | proc = SCM_CAR (SCM_CDR (x)); | |
1595 | t.arg1 = SCM_EOL; | |
1596 | do | |
1597 | { | |
1598 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
1599 | } | |
1600 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
e2806c10 | 1601 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd | 1602 | x = SCM_CDR (x); |
6dbd0af5 | 1603 | goto cdrxnoap; |
0f2d19dd JB |
1604 | |
1605 | ||
1606 | case (127 & SCM_IM_LETREC): | |
1607 | x = SCM_CDR (x); | |
e2806c10 | 1608 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd JB |
1609 | x = SCM_CDR (x); |
1610 | proc = SCM_CAR (x); | |
1611 | t.arg1 = SCM_EOL; | |
1612 | do | |
1613 | { | |
1614 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
1615 | } | |
1616 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
a23afe53 | 1617 | SCM_SETCDR (SCM_CAR (env), t.arg1); |
6dbd0af5 | 1618 | goto cdrxnoap; |
0f2d19dd JB |
1619 | |
1620 | ||
1621 | case (127 & SCM_IM_LETSTAR): | |
1622 | x = SCM_CDR (x); | |
1623 | proc = SCM_CAR (x); | |
1624 | if (SCM_IMP (proc)) | |
1625 | { | |
e2806c10 | 1626 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 | 1627 | goto cdrxnoap; |
0f2d19dd JB |
1628 | } |
1629 | do | |
1630 | { | |
1631 | t.arg1 = SCM_CAR (proc); | |
1632 | proc = SCM_CDR (proc); | |
e2806c10 | 1633 | env = EXTEND_ENV (t.arg1, EVALCAR (proc, env), env); |
0f2d19dd JB |
1634 | } |
1635 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
6dbd0af5 | 1636 | goto cdrxnoap; |
0f2d19dd JB |
1637 | |
1638 | case (127 & SCM_IM_OR): | |
1639 | x = SCM_CDR (x); | |
1640 | t.arg1 = x; | |
1641 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1642 | { | |
1643 | x = EVALCAR (x, env); | |
1644 | if (SCM_NFALSEP (x)) | |
1645 | { | |
1646 | RETURN (x); | |
1647 | } | |
1648 | x = t.arg1; | |
1649 | } | |
6dbd0af5 | 1650 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1651 | goto carloop; |
1652 | ||
1653 | ||
1654 | case (127 & SCM_IM_LAMBDA): | |
1655 | RETURN (scm_closure (SCM_CDR (x), env)); | |
1656 | ||
1657 | ||
1658 | case (127 & SCM_IM_QUOTE): | |
1659 | RETURN (SCM_CAR (SCM_CDR (x))); | |
1660 | ||
1661 | ||
1662 | case (127 & SCM_IM_SET): | |
0f2d19dd JB |
1663 | x = SCM_CDR (x); |
1664 | proc = SCM_CAR (x); | |
6dbd0af5 | 1665 | switch (7 & (int) proc) |
0f2d19dd JB |
1666 | { |
1667 | case 0: | |
1668 | t.lloc = scm_lookupcar (x, env); | |
1669 | break; | |
1670 | case 1: | |
a23afe53 | 1671 | t.lloc = SCM_GLOC_VAL_LOC (proc); |
0f2d19dd JB |
1672 | break; |
1673 | #ifdef MEMOIZE_LOCALS | |
1674 | case 4: | |
1675 | t.lloc = scm_ilookup (proc, env); | |
1676 | break; | |
1677 | #endif | |
1678 | } | |
1679 | x = SCM_CDR (x); | |
1680 | *t.lloc = EVALCAR (x, env); | |
0f2d19dd JB |
1681 | #ifdef SICP |
1682 | RETURN (*t.lloc); | |
1683 | #else | |
1684 | RETURN (SCM_UNSPECIFIED); | |
1685 | #endif | |
1686 | ||
1687 | ||
1688 | case (127 & SCM_IM_DEFINE): /* only for internal defines */ | |
1689 | x = SCM_CDR (x); | |
1690 | proc = SCM_CAR (x); | |
1691 | x = SCM_CDR (x); | |
1692 | x = evalcar (x, env); | |
6dbd0af5 | 1693 | #ifdef DEBUG_EXTENSIONS |
b7ff98dd | 1694 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x) && SCM_CLOSUREP (x)) |
6dbd0af5 MD |
1695 | scm_set_procedure_property_x (x, scm_i_name, proc); |
1696 | #endif | |
0f2d19dd JB |
1697 | env = SCM_CAR (env); |
1698 | SCM_DEFER_INTS; | |
a23afe53 MD |
1699 | SCM_SETCAR (env, scm_cons (proc, SCM_CAR (env))); |
1700 | SCM_SETCDR (env, scm_cons (x, SCM_CDR (env))); | |
0f2d19dd JB |
1701 | SCM_ALLOW_INTS; |
1702 | RETURN (SCM_UNSPECIFIED); | |
1703 | ||
1704 | ||
0f2d19dd JB |
1705 | /* new syntactic forms go here. */ |
1706 | case (127 & SCM_MAKISYM (0)): | |
1707 | proc = SCM_CAR (x); | |
1708 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
1709 | switch SCM_ISYMNUM (proc) | |
1710 | { | |
1711 | #if 0 | |
1712 | case (SCM_ISYMNUM (IM_VREF)): | |
1713 | { | |
1714 | SCM var; | |
1715 | var = SCM_CAR (SCM_CDR (x)); | |
1716 | RETURN (SCM_CDR(var)); | |
1717 | } | |
1718 | case (SCM_ISYMNUM (IM_VSET)): | |
1719 | SCM_CDR (SCM_CAR ( SCM_CDR (x))) = EVALCAR( SCM_CDR ( SCM_CDR (x)), env); | |
1720 | SCM_CAR (SCM_CAR ( SCM_CDR (x))) = scm_tc16_variable; | |
6dbd0af5 | 1721 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
1722 | #endif |
1723 | ||
1724 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
1725 | proc = SCM_CDR (x); | |
1726 | proc = EVALCAR (proc, env); | |
1727 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
1728 | if (SCM_CLOSUREP (proc)) | |
1729 | { | |
6dbd0af5 | 1730 | PREP_APPLY (proc, SCM_EOL); |
0f2d19dd JB |
1731 | t.arg1 = SCM_CDR (SCM_CDR (x)); |
1732 | t.arg1 = EVALCAR (t.arg1, env); | |
6dbd0af5 MD |
1733 | #ifdef DEVAL |
1734 | debug.info->a.args = t.arg1; | |
1735 | #endif | |
0f2d19dd JB |
1736 | #ifndef RECKLESS |
1737 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), t.arg1)) | |
1738 | goto wrongnumargs; | |
1739 | #endif | |
e2806c10 | 1740 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), t.arg1, SCM_ENV (proc)); |
0f2d19dd JB |
1741 | x = SCM_CODE (proc); |
1742 | goto cdrxbegin; | |
1743 | } | |
1744 | proc = scm_i_apply; | |
1745 | goto evapply; | |
1746 | ||
1747 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
1748 | scm_make_cont (&t.arg1); | |
c4ac4d88 | 1749 | if (safe_setjmp (SCM_JMPBUF (t.arg1))) |
0f2d19dd JB |
1750 | { |
1751 | SCM val; | |
1752 | val = SCM_THROW_VALUE (t.arg1); | |
6dbd0af5 | 1753 | RETURN (val); |
0f2d19dd JB |
1754 | } |
1755 | proc = SCM_CDR (x); | |
1756 | proc = evalcar (proc, env); | |
1757 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
1758 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
1759 | ENTER_APPLY; | |
0f2d19dd JB |
1760 | goto evap1; |
1761 | ||
1762 | default: | |
1763 | goto badfun; | |
1764 | } | |
1765 | ||
1766 | default: | |
1767 | proc = x; | |
1768 | badfun: | |
f5bf2977 | 1769 | /* scm_everr (x, env,...) */ |
523f5266 GH |
1770 | scm_misc_error (NULL, |
1771 | "Wrong type to apply: %S", | |
1772 | scm_listify (proc, SCM_UNDEFINED)); | |
0f2d19dd JB |
1773 | case scm_tc7_vector: |
1774 | case scm_tc7_wvect: | |
1775 | case scm_tc7_bvect: | |
1776 | case scm_tc7_byvect: | |
1777 | case scm_tc7_svect: | |
1778 | case scm_tc7_ivect: | |
1779 | case scm_tc7_uvect: | |
1780 | case scm_tc7_fvect: | |
1781 | case scm_tc7_dvect: | |
1782 | case scm_tc7_cvect: | |
1783 | #ifdef LONGLONGS | |
1784 | case scm_tc7_llvect: | |
1785 | #endif | |
1786 | case scm_tc7_string: | |
1787 | case scm_tc7_mb_string: | |
1788 | case scm_tc7_substring: | |
1789 | case scm_tc7_mb_substring: | |
1790 | case scm_tc7_smob: | |
1791 | case scm_tcs_closures: | |
1792 | case scm_tcs_subrs: | |
1793 | RETURN (x); | |
1794 | ||
1795 | #ifdef MEMOIZE_LOCALS | |
1796 | case (127 & SCM_ILOC00): | |
1797 | proc = *scm_ilookup (SCM_CAR (x), env); | |
1798 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
1799 | #ifndef RECKLESS | |
1800 | #ifdef CAUTIOUS | |
1801 | goto checkargs; | |
1802 | #endif | |
1803 | #endif | |
1804 | break; | |
1805 | #endif /* ifdef MEMOIZE_LOCALS */ | |
1806 | ||
1807 | ||
1808 | case scm_tcs_cons_gloc: | |
1809 | proc = SCM_GLOC_VAL (SCM_CAR (x)); | |
1810 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
1811 | #ifndef RECKLESS | |
1812 | #ifdef CAUTIOUS | |
1813 | goto checkargs; | |
1814 | #endif | |
1815 | #endif | |
1816 | break; | |
1817 | ||
1818 | ||
1819 | case scm_tcs_cons_nimcar: | |
1820 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
1821 | { | |
1822 | proc = *scm_lookupcar (x, env); | |
1823 | if (SCM_IMP (proc)) | |
1824 | { | |
1825 | unmemocar (x, env); | |
1826 | goto badfun; | |
1827 | } | |
1828 | if (scm_tc16_macro == SCM_TYP16 (proc)) | |
1829 | { | |
1830 | unmemocar (x, env); | |
1831 | ||
1832 | handle_a_macro: | |
1833 | t.arg1 = SCM_APPLY (SCM_CDR (proc), x, scm_cons (env, scm_listofnull)); | |
1834 | switch ((int) (SCM_CAR (proc) >> 16)) | |
1835 | { | |
1836 | case 2: | |
1837 | if (scm_ilength (t.arg1) <= 0) | |
1838 | t.arg1 = scm_cons2 (SCM_IM_BEGIN, t.arg1, SCM_EOL); | |
6dbd0af5 MD |
1839 | #ifdef DEVAL |
1840 | if (!SCM_CLOSUREP (SCM_CDR (proc))) | |
1841 | { | |
1842 | #if 0 /* Top-level defines doesn't very often occur in backtraces */ | |
1843 | if (scm_m_define == SCM_SUBRF (SCM_CDR (proc)) && SCM_TOP_LEVEL (env)) | |
1844 | /* Prevent memoizing result of define macro */ | |
1845 | { | |
1846 | debug.info->e.exp = scm_cons (SCM_CAR (x), SCM_CDR (x)); | |
1847 | scm_set_source_properties_x (debug.info->e.exp, | |
1848 | scm_source_properties (x)); | |
1849 | } | |
1850 | #endif | |
1851 | SCM_DEFER_INTS; | |
a23afe53 MD |
1852 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
1853 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
6dbd0af5 MD |
1854 | SCM_ALLOW_INTS; |
1855 | goto dispatch; | |
1856 | } | |
1857 | /* Prevent memoizing of debug info expression. */ | |
1858 | debug.info->e.exp = scm_cons (SCM_CAR (x), SCM_CDR (x)); | |
1859 | scm_set_source_properties_x (debug.info->e.exp, | |
1860 | scm_source_properties (x)); | |
1861 | #endif | |
0f2d19dd | 1862 | SCM_DEFER_INTS; |
a23afe53 MD |
1863 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
1864 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
0f2d19dd | 1865 | SCM_ALLOW_INTS; |
6dbd0af5 | 1866 | goto loopnoap; |
0f2d19dd JB |
1867 | case 1: |
1868 | if (SCM_NIMP (x = t.arg1)) | |
6dbd0af5 | 1869 | goto loopnoap; |
0f2d19dd JB |
1870 | case 0: |
1871 | RETURN (t.arg1); | |
1872 | } | |
1873 | } | |
1874 | } | |
1875 | else | |
1876 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
1877 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
1878 | #ifndef RECKLESS | |
1879 | #ifdef CAUTIOUS | |
1880 | checkargs: | |
1881 | #endif | |
1882 | if (SCM_CLOSUREP (proc)) | |
1883 | { | |
1884 | arg2 = SCM_CAR (SCM_CODE (proc)); | |
1885 | t.arg1 = SCM_CDR (x); | |
1886 | while (SCM_NIMP (arg2)) | |
1887 | { | |
1888 | if (SCM_NCONSP (arg2)) | |
1889 | goto evapply; | |
1890 | if (SCM_IMP (t.arg1)) | |
1891 | goto umwrongnumargs; | |
1892 | arg2 = SCM_CDR (arg2); | |
1893 | t.arg1 = SCM_CDR (t.arg1); | |
1894 | } | |
1895 | if (SCM_NNULLP (t.arg1)) | |
1896 | goto umwrongnumargs; | |
1897 | } | |
1898 | else if (scm_tc16_macro == SCM_TYP16 (proc)) | |
1899 | goto handle_a_macro; | |
1900 | #endif | |
1901 | } | |
1902 | ||
1903 | ||
6dbd0af5 MD |
1904 | evapply: |
1905 | PREP_APPLY (proc, SCM_EOL); | |
1906 | if (SCM_NULLP (SCM_CDR (x))) { | |
1907 | ENTER_APPLY; | |
0f2d19dd JB |
1908 | switch (SCM_TYP7 (proc)) |
1909 | { /* no arguments given */ | |
1910 | case scm_tc7_subr_0: | |
1911 | RETURN (SCM_SUBRF (proc) ()); | |
1912 | case scm_tc7_subr_1o: | |
1913 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
1914 | case scm_tc7_lsubr: | |
1915 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
1916 | case scm_tc7_rpsubr: | |
1917 | RETURN (SCM_BOOL_T); | |
1918 | case scm_tc7_asubr: | |
1919 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
6dbd0af5 | 1920 | #ifdef CCLO |
0f2d19dd JB |
1921 | case scm_tc7_cclo: |
1922 | t.arg1 = proc; | |
1923 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
1924 | #ifdef DEVAL |
1925 | debug.info->a.proc = proc; | |
1926 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
1927 | #endif | |
0f2d19dd | 1928 | goto evap1; |
6dbd0af5 | 1929 | #endif |
0f2d19dd JB |
1930 | case scm_tcs_closures: |
1931 | x = SCM_CODE (proc); | |
e2806c10 | 1932 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, SCM_ENV (proc)); |
0f2d19dd JB |
1933 | goto cdrxbegin; |
1934 | case scm_tc7_contin: | |
1935 | case scm_tc7_subr_1: | |
1936 | case scm_tc7_subr_2: | |
1937 | case scm_tc7_subr_2o: | |
1938 | case scm_tc7_cxr: | |
1939 | case scm_tc7_subr_3: | |
1940 | case scm_tc7_lsubr_2: | |
1941 | umwrongnumargs: | |
1942 | unmemocar (x, env); | |
1943 | wrongnumargs: | |
f5bf2977 GH |
1944 | /* scm_everr (x, env,...) */ |
1945 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
1946 | default: |
1947 | /* handle macros here */ | |
1948 | goto badfun; | |
1949 | } | |
6dbd0af5 | 1950 | } |
0f2d19dd JB |
1951 | |
1952 | /* must handle macros by here */ | |
1953 | x = SCM_CDR (x); | |
1954 | #ifdef CAUTIOUS | |
1955 | if (SCM_IMP (x)) | |
1956 | goto wrongnumargs; | |
1957 | #endif | |
1958 | t.arg1 = EVALCAR (x, env); | |
6dbd0af5 MD |
1959 | #ifdef DEVAL |
1960 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
1961 | #endif | |
0f2d19dd JB |
1962 | x = SCM_CDR (x); |
1963 | if (SCM_NULLP (x)) | |
1964 | { | |
6dbd0af5 | 1965 | ENTER_APPLY; |
0f2d19dd JB |
1966 | evap1: |
1967 | switch (SCM_TYP7 (proc)) | |
6dbd0af5 | 1968 | { /* have one argument in t.arg1 */ |
0f2d19dd JB |
1969 | case scm_tc7_subr_2o: |
1970 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
1971 | case scm_tc7_subr_1: | |
1972 | case scm_tc7_subr_1o: | |
1973 | RETURN (SCM_SUBRF (proc) (t.arg1)); | |
1974 | case scm_tc7_cxr: | |
1975 | #ifdef SCM_FLOATS | |
1976 | if (SCM_SUBRF (proc)) | |
1977 | { | |
1978 | if (SCM_INUMP (t.arg1)) | |
1979 | { | |
1980 | RETURN (scm_makdbl (SCM_DSUBRF (proc) ((double) SCM_INUM (t.arg1)), | |
1981 | 0.0)); | |
1982 | } | |
1983 | SCM_ASRTGO (SCM_NIMP (t.arg1), floerr); | |
1984 | if (SCM_REALP (t.arg1)) | |
1985 | { | |
1986 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (SCM_REALPART (t.arg1)), 0.0)); | |
1987 | } | |
1988 | #ifdef SCM_BIGDIG | |
1989 | if (SCM_BIGP (t.arg1)) | |
1990 | { | |
1991 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (scm_big2dbl (t.arg1)), 0.0)); | |
1992 | } | |
1993 | #endif | |
1994 | floerr: | |
1995 | scm_wta (t.arg1, (char *) SCM_ARG1, SCM_CHARS (SCM_SNAME (proc))); | |
1996 | } | |
1997 | #endif | |
1998 | proc = (SCM) SCM_SNAME (proc); | |
1999 | { | |
2000 | char *chrs = SCM_CHARS (proc) + SCM_LENGTH (proc) - 1; | |
2001 | while ('c' != *--chrs) | |
2002 | { | |
2003 | SCM_ASSERT (SCM_NIMP (t.arg1) && SCM_CONSP (t.arg1), | |
2004 | t.arg1, SCM_ARG1, SCM_CHARS (proc)); | |
2005 | t.arg1 = ('a' == *chrs) ? SCM_CAR (t.arg1) : SCM_CDR (t.arg1); | |
2006 | } | |
2007 | RETURN (t.arg1); | |
2008 | } | |
2009 | case scm_tc7_rpsubr: | |
2010 | RETURN (SCM_BOOL_T); | |
2011 | case scm_tc7_asubr: | |
2012 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2013 | case scm_tc7_lsubr: | |
2014 | #ifdef DEVAL | |
6dbd0af5 | 2015 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
0f2d19dd JB |
2016 | #else |
2017 | RETURN (SCM_SUBRF (proc) (scm_cons (t.arg1, SCM_EOL))); | |
2018 | #endif | |
6dbd0af5 | 2019 | #ifdef CCLO |
0f2d19dd JB |
2020 | case scm_tc7_cclo: |
2021 | arg2 = t.arg1; | |
2022 | t.arg1 = proc; | |
2023 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2024 | #ifdef DEVAL |
2025 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); | |
2026 | debug.info->a.proc = proc; | |
2027 | #endif | |
0f2d19dd | 2028 | goto evap2; |
6dbd0af5 | 2029 | #endif |
0f2d19dd JB |
2030 | case scm_tcs_closures: |
2031 | x = SCM_CODE (proc); | |
2032 | #ifdef DEVAL | |
e2806c10 | 2033 | env = EXTEND_ENV (SCM_CAR (x), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2034 | #else |
e2806c10 | 2035 | env = EXTEND_ENV (SCM_CAR (x), scm_cons (t.arg1, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd JB |
2036 | #endif |
2037 | goto cdrxbegin; | |
2038 | case scm_tc7_contin: | |
2039 | scm_call_continuation (proc, t.arg1); | |
2040 | case scm_tc7_subr_2: | |
2041 | case scm_tc7_subr_0: | |
2042 | case scm_tc7_subr_3: | |
2043 | case scm_tc7_lsubr_2: | |
2044 | goto wrongnumargs; | |
2045 | default: | |
2046 | goto badfun; | |
2047 | } | |
2048 | } | |
2049 | #ifdef CAUTIOUS | |
2050 | if (SCM_IMP (x)) | |
2051 | goto wrongnumargs; | |
2052 | #endif | |
2053 | { /* have two or more arguments */ | |
2054 | arg2 = EVALCAR (x, env); | |
6dbd0af5 MD |
2055 | #ifdef DEVAL |
2056 | debug.info->a.args = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2057 | #endif | |
0f2d19dd JB |
2058 | x = SCM_CDR (x); |
2059 | if (SCM_NULLP (x)) { | |
6dbd0af5 | 2060 | ENTER_APPLY; |
0f2d19dd JB |
2061 | #ifdef CCLO |
2062 | evap2: | |
2063 | #endif | |
6dbd0af5 MD |
2064 | switch (SCM_TYP7 (proc)) |
2065 | { /* have two arguments */ | |
2066 | case scm_tc7_subr_2: | |
2067 | case scm_tc7_subr_2o: | |
2068 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2069 | case scm_tc7_lsubr: | |
0f2d19dd | 2070 | #ifdef DEVAL |
6dbd0af5 MD |
2071 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
2072 | #else | |
2073 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, arg2, SCM_EOL))); | |
0f2d19dd | 2074 | #endif |
6dbd0af5 MD |
2075 | case scm_tc7_lsubr_2: |
2076 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_EOL)); | |
2077 | case scm_tc7_rpsubr: | |
2078 | case scm_tc7_asubr: | |
2079 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2080 | #ifdef CCLO | |
2081 | cclon: | |
2082 | case scm_tc7_cclo: | |
0f2d19dd | 2083 | #ifdef DEVAL |
6dbd0af5 MD |
2084 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), proc, |
2085 | scm_cons (debug.info->a.args, SCM_EOL))); | |
0f2d19dd | 2086 | #else |
6dbd0af5 MD |
2087 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), proc, |
2088 | scm_cons2 (t.arg1, arg2, | |
2089 | scm_cons (scm_eval_args (x, env), SCM_EOL)))); | |
0f2d19dd | 2090 | #endif |
6dbd0af5 MD |
2091 | /* case scm_tc7_cclo: |
2092 | x = scm_cons(arg2, scm_eval_args(x, env)); | |
2093 | arg2 = t.arg1; | |
2094 | t.arg1 = proc; | |
2095 | proc = SCM_CCLO_SUBR(proc); | |
2096 | goto evap3; */ | |
2097 | #endif | |
2098 | case scm_tc7_subr_0: | |
2099 | case scm_tc7_cxr: | |
2100 | case scm_tc7_subr_1o: | |
2101 | case scm_tc7_subr_1: | |
2102 | case scm_tc7_subr_3: | |
2103 | case scm_tc7_contin: | |
2104 | goto wrongnumargs; | |
2105 | default: | |
2106 | goto badfun; | |
2107 | case scm_tcs_closures: | |
0f2d19dd | 2108 | #ifdef DEVAL |
e2806c10 | 2109 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2110 | #else |
e2806c10 | 2111 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), scm_cons2 (t.arg1, arg2, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd | 2112 | #endif |
6dbd0af5 MD |
2113 | x = SCM_CODE (proc); |
2114 | goto cdrxbegin; | |
2115 | } | |
0f2d19dd JB |
2116 | } |
2117 | #ifdef DEVAL | |
6dbd0af5 | 2118 | debug.info->a.args = scm_cons2 (t.arg1, arg2, |
a23afe53 | 2119 | scm_deval_args (x, env, SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); |
0f2d19dd | 2120 | #endif |
6dbd0af5 MD |
2121 | ENTER_APPLY; |
2122 | switch (SCM_TYP7 (proc)) | |
2123 | { /* have 3 or more arguments */ | |
0f2d19dd | 2124 | #ifdef DEVAL |
6dbd0af5 MD |
2125 | case scm_tc7_subr_3: |
2126 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
2127 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_CAR (SCM_CDR (SCM_CDR (debug.info->a.args))))); | |
2128 | case scm_tc7_asubr: | |
399dedcc MD |
2129 | #ifdef BUILTIN_RPASUBR |
2130 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
2131 | arg2 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
2132 | do { | |
2133 | t.arg1 = SCM_SUBRF(proc)(t.arg1, SCM_CAR (arg2)); | |
2134 | arg2 = SCM_CDR (arg2); | |
2135 | } while (SCM_NIMP (arg2)); | |
2136 | RETURN (t.arg1) | |
2137 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 2138 | case scm_tc7_rpsubr: |
71d3aa6d MD |
2139 | #ifdef BUILTIN_RPASUBR |
2140 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
2141 | RETURN (SCM_BOOL_F) | |
2142 | t.arg1 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
2143 | do { | |
2144 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (t.arg1)))) | |
2145 | RETURN (SCM_BOOL_F) | |
2146 | arg2 = SCM_CAR (t.arg1); | |
2147 | t.arg1 = SCM_CDR (t.arg1); | |
2148 | } while (SCM_NIMP (t.arg1)); | |
2149 | RETURN (SCM_BOOL_T) | |
2150 | #else /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 2151 | RETURN (SCM_APPLY (proc, t.arg1, scm_acons (arg2, SCM_CDR (SCM_CDR (debug.info->a.args)), SCM_EOL))) |
71d3aa6d | 2152 | #endif /* BUILTIN_RPASUBR */ |
399dedcc MD |
2153 | case scm_tc7_lsubr_2: |
2154 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_CDR (SCM_CDR (debug.info->a.args)))) | |
2155 | case scm_tc7_lsubr: | |
2156 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) | |
0f2d19dd | 2157 | #ifdef CCLO |
6dbd0af5 MD |
2158 | case scm_tc7_cclo: |
2159 | goto cclon; | |
0f2d19dd | 2160 | #endif |
6dbd0af5 | 2161 | case scm_tcs_closures: |
b7ff98dd | 2162 | SCM_SET_ARGSREADY (debug); |
e2806c10 | 2163 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
6dbd0af5 MD |
2164 | debug.info->a.args, |
2165 | SCM_ENV (proc)); | |
2166 | x = SCM_CODE (proc); | |
2167 | goto cdrxbegin; | |
2168 | #else /* DEVAL */ | |
2169 | case scm_tc7_subr_3: | |
2170 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
2171 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, EVALCAR (x, env))); | |
2172 | case scm_tc7_asubr: | |
399dedcc MD |
2173 | #ifdef BUILTIN_RPASUBR |
2174 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
2175 | do { | |
2176 | t.arg1 = SCM_SUBRF(proc)(t.arg1, EVALCAR(x, env)); | |
2177 | x = SCM_CDR(x); | |
2178 | } while (SCM_NIMP (x)); | |
2179 | RETURN (t.arg1) | |
2180 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 2181 | case scm_tc7_rpsubr: |
71d3aa6d MD |
2182 | #ifdef BUILTIN_RPASUBR |
2183 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
2184 | RETURN (SCM_BOOL_F) | |
2185 | do { | |
2186 | t.arg1 = EVALCAR (x, env); | |
2187 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, t.arg1))) | |
2188 | RETURN (SCM_BOOL_F) | |
2189 | arg2 = t.arg1; | |
2190 | x = SCM_CDR (x); | |
2191 | } while (SCM_NIMP (x)); | |
2192 | RETURN (SCM_BOOL_T) | |
2193 | #else /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 2194 | RETURN (SCM_APPLY (proc, t.arg1, scm_acons (arg2, scm_eval_args (x, env), SCM_EOL))); |
71d3aa6d | 2195 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 MD |
2196 | case scm_tc7_lsubr_2: |
2197 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, scm_eval_args (x, env))); | |
2198 | case scm_tc7_lsubr: | |
2199 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, arg2, scm_eval_args (x, env)))); | |
0f2d19dd | 2200 | #ifdef CCLO |
6dbd0af5 MD |
2201 | case scm_tc7_cclo: |
2202 | goto cclon; | |
0f2d19dd | 2203 | #endif |
6dbd0af5 MD |
2204 | case scm_tcs_closures: |
2205 | #ifdef DEVAL | |
b7ff98dd | 2206 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 2207 | #endif |
e2806c10 | 2208 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
6dbd0af5 MD |
2209 | scm_cons2 (t.arg1, arg2, scm_eval_args (x, env)), |
2210 | SCM_ENV (proc)); | |
2211 | x = SCM_CODE (proc); | |
2212 | goto cdrxbegin; | |
0f2d19dd | 2213 | #endif /* DEVAL */ |
6dbd0af5 MD |
2214 | case scm_tc7_subr_2: |
2215 | case scm_tc7_subr_1o: | |
2216 | case scm_tc7_subr_2o: | |
2217 | case scm_tc7_subr_0: | |
2218 | case scm_tc7_cxr: | |
2219 | case scm_tc7_subr_1: | |
2220 | case scm_tc7_contin: | |
2221 | goto wrongnumargs; | |
2222 | default: | |
2223 | goto badfun; | |
2224 | } | |
0f2d19dd JB |
2225 | } |
2226 | #ifdef DEVAL | |
6dbd0af5 MD |
2227 | exit: |
2228 | if (CHECK_EXIT) | |
b7ff98dd | 2229 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 2230 | { |
b7ff98dd | 2231 | SCM_EXIT_FRAME_P = 0; |
c6a4fbce | 2232 | SCM_TRACE_P = 0; |
b7ff98dd MD |
2233 | SCM_RESET_DEBUG_MODE; |
2234 | SCM_CLEAR_TRACED_FRAME (debug); | |
2235 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 2236 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
2237 | else |
2238 | { | |
2239 | scm_make_cont (&t.arg1); | |
c4ac4d88 | 2240 | if (safe_setjmp (SCM_JMPBUF (t.arg1))) |
6dbd0af5 MD |
2241 | { |
2242 | proc = SCM_THROW_VALUE (t.arg1); | |
2243 | goto ret; | |
2244 | } | |
2245 | } | |
2246 | scm_ithrow (scm_i_exit_frame, scm_cons2 (t.arg1, proc, SCM_EOL), 0); | |
2247 | } | |
2248 | ret: | |
1646d37b | 2249 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
2250 | return proc; |
2251 | #endif | |
2252 | } | |
2253 | ||
6dbd0af5 MD |
2254 | |
2255 | /* SECTION: This code is compiled once. | |
2256 | */ | |
2257 | ||
0f2d19dd JB |
2258 | #ifndef DEVAL |
2259 | ||
2260 | SCM_PROC(s_procedure_documentation, "procedure-documentation", 1, 0, 0, scm_procedure_documentation); | |
1cc91f1b | 2261 | |
0f2d19dd JB |
2262 | SCM |
2263 | scm_procedure_documentation (proc) | |
2264 | SCM proc; | |
0f2d19dd JB |
2265 | { |
2266 | SCM code; | |
2267 | SCM_ASSERT (SCM_BOOL_T == scm_procedure_p (proc) && SCM_NIMP (proc) && SCM_TYP7 (proc) != scm_tc7_contin, | |
2268 | proc, SCM_ARG1, s_procedure_documentation); | |
2269 | switch (SCM_TYP7 (proc)) | |
2270 | { | |
2271 | case scm_tcs_closures: | |
2272 | code = SCM_CDR (SCM_CODE (proc)); | |
2273 | if (SCM_IMP (SCM_CDR (code))) | |
2274 | return SCM_BOOL_F; | |
2275 | code = SCM_CAR (code); | |
2276 | if (SCM_IMP (code)) | |
2277 | return SCM_BOOL_F; | |
2278 | if (SCM_STRINGP (code)) | |
2279 | return code; | |
2280 | default: | |
2281 | return SCM_BOOL_F; | |
2282 | /* | |
2283 | case scm_tcs_subrs: | |
2284 | #ifdef CCLO | |
2285 | case scm_tc7_cclo: | |
2286 | #endif | |
2287 | */ | |
2288 | } | |
2289 | } | |
2290 | ||
82a2622a | 2291 | /* This code processes the arguments to apply: |
b145c172 JB |
2292 | |
2293 | (apply PROC ARG1 ... ARGS) | |
2294 | ||
82a2622a JB |
2295 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
2296 | ... arguments onto the front of ARGS, and returns the resulting | |
2297 | list. Note that ARGS is a list; thus, the argument to this | |
2298 | function is a list whose last element is a list. | |
2299 | ||
2300 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
2301 | result. apply:nconc2last takes care of building the list of |
2302 | arguments, given (ARG1 ... ARGS). | |
2303 | ||
82a2622a JB |
2304 | Rather than do new consing, apply:nconc2last destroys its argument. |
2305 | On that topic, this code came into my care with the following | |
2306 | beautifully cryptic comment on that topic: "This will only screw | |
2307 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
2308 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 2309 | |
0f2d19dd | 2310 | SCM_PROC(s_nconc2last, "apply:nconc2last", 1, 0, 0, scm_nconc2last); |
1cc91f1b | 2311 | |
0f2d19dd JB |
2312 | SCM |
2313 | scm_nconc2last (lst) | |
2314 | SCM lst; | |
0f2d19dd JB |
2315 | { |
2316 | SCM *lloc; | |
b145c172 | 2317 | SCM_ASSERT (scm_ilength (lst) > 0, lst, SCM_ARG1, s_nconc2last); |
0f2d19dd JB |
2318 | lloc = &lst; |
2319 | while (SCM_NNULLP (SCM_CDR (*lloc))) | |
a23afe53 | 2320 | lloc = SCM_CDRLOC (*lloc); |
b145c172 | 2321 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, s_nconc2last); |
0f2d19dd JB |
2322 | *lloc = SCM_CAR (*lloc); |
2323 | return lst; | |
2324 | } | |
2325 | ||
2326 | #endif /* !DEVAL */ | |
2327 | ||
6dbd0af5 MD |
2328 | |
2329 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
2330 | * It is compiled twice. | |
2331 | */ | |
2332 | ||
0f2d19dd | 2333 | #if 0 |
1cc91f1b | 2334 | |
0f2d19dd JB |
2335 | SCM |
2336 | scm_apply (proc, arg1, args) | |
2337 | SCM proc; | |
2338 | SCM arg1; | |
2339 | SCM args; | |
0f2d19dd JB |
2340 | {} |
2341 | #endif | |
2342 | ||
2343 | #if 0 | |
1cc91f1b | 2344 | |
0f2d19dd JB |
2345 | SCM |
2346 | scm_dapply (proc, arg1, args) | |
2347 | SCM proc; | |
2348 | SCM arg1; | |
2349 | SCM args; | |
0f2d19dd JB |
2350 | {} |
2351 | #endif | |
2352 | ||
1cc91f1b | 2353 | |
82a2622a JB |
2354 | /* Apply a function to a list of arguments. |
2355 | ||
2356 | This function is exported to the Scheme level as taking two | |
2357 | required arguments and a tail argument, as if it were: | |
2358 | (lambda (proc arg1 . args) ...) | |
2359 | Thus, if you just have a list of arguments to pass to a procedure, | |
2360 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
2361 | args, pass the first as ARG1, then cons any remaining fixed args | |
2362 | onto the front of your argument list, and pass that as ARGS. */ | |
2363 | ||
0f2d19dd JB |
2364 | SCM |
2365 | SCM_APPLY (proc, arg1, args) | |
2366 | SCM proc; | |
2367 | SCM arg1; | |
2368 | SCM args; | |
0f2d19dd JB |
2369 | { |
2370 | #ifdef DEBUG_EXTENSIONS | |
2371 | #ifdef DEVAL | |
6dbd0af5 | 2372 | scm_debug_frame debug; |
c0ab1b8d | 2373 | scm_debug_info debug_vect_body; |
1646d37b | 2374 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 2375 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 2376 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
2377 | debug.vect[0].a.proc = proc; |
2378 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 2379 | scm_last_debug_frame = &debug; |
0f2d19dd | 2380 | #else |
b7ff98dd | 2381 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
2382 | return scm_dapply (proc, arg1, args); |
2383 | #endif | |
2384 | #endif | |
2385 | ||
2386 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
2387 | |
2388 | /* If ARGS is the empty list, then we're calling apply with only two | |
2389 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
2390 | the case, futz with things so that ARG1 is the first argument to | |
2391 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
2392 | rest. |
2393 | ||
2394 | Setting the debug apply frame args this way is pretty messy. | |
2395 | Perhaps we should store arg1 and args directly in the frame as | |
2396 | received, and let scm_frame_arguments unpack them, because that's | |
2397 | a relatively rare operation. This works for now; if the Guile | |
2398 | developer archives are still around, see Mikael's post of | |
2399 | 11-Apr-97. */ | |
0f2d19dd JB |
2400 | if (SCM_NULLP (args)) |
2401 | { | |
2402 | if (SCM_NULLP (arg1)) | |
30000774 JB |
2403 | { |
2404 | arg1 = SCM_UNDEFINED; | |
2405 | #ifdef DEVAL | |
2406 | debug.vect[0].a.args = SCM_EOL; | |
2407 | #endif | |
2408 | } | |
0f2d19dd JB |
2409 | else |
2410 | { | |
30000774 JB |
2411 | #ifdef DEVAL |
2412 | debug.vect[0].a.args = arg1; | |
2413 | #endif | |
0f2d19dd JB |
2414 | args = SCM_CDR (arg1); |
2415 | arg1 = SCM_CAR (arg1); | |
2416 | } | |
2417 | } | |
2418 | else | |
2419 | { | |
82a2622a | 2420 | /* SCM_ASRTGO(SCM_NIMP(args) && SCM_CONSP(args), wrongnumargs); */ |
0f2d19dd | 2421 | args = scm_nconc2last (args); |
30000774 JB |
2422 | #ifdef DEVAL |
2423 | debug.vect[0].a.args = scm_cons (arg1, args); | |
2424 | #endif | |
0f2d19dd | 2425 | } |
0f2d19dd | 2426 | #ifdef DEVAL |
b7ff98dd | 2427 | if (SCM_ENTER_FRAME_P) |
6dbd0af5 MD |
2428 | { |
2429 | SCM tmp; | |
b7ff98dd MD |
2430 | SCM_ENTER_FRAME_P = 0; |
2431 | SCM_RESET_DEBUG_MODE; | |
2432 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 2433 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
2434 | else |
2435 | { | |
2436 | scm_make_cont (&tmp); | |
c4ac4d88 | 2437 | if (safe_setjmp (SCM_JMPBUF (tmp))) |
6dbd0af5 MD |
2438 | goto entap; |
2439 | } | |
2440 | scm_ithrow (scm_i_enter_frame, scm_cons (tmp, SCM_EOL), 0); | |
2441 | } | |
2442 | entap: | |
2443 | ENTER_APPLY; | |
2444 | #endif | |
2445 | #ifdef CCLO | |
2446 | tail: | |
0f2d19dd JB |
2447 | #endif |
2448 | switch (SCM_TYP7 (proc)) | |
2449 | { | |
2450 | case scm_tc7_subr_2o: | |
2451 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
2452 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
2453 | case scm_tc7_subr_2: | |
2454 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (args)), wrongnumargs); | |
2455 | args = SCM_CAR (args); | |
2456 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
2457 | case scm_tc7_subr_0: | |
2458 | SCM_ASRTGO (SCM_UNBNDP (arg1), wrongnumargs); | |
2459 | RETURN (SCM_SUBRF (proc) ()) | |
2460 | case scm_tc7_subr_1: | |
2461 | case scm_tc7_subr_1o: | |
2462 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
2463 | RETURN (SCM_SUBRF (proc) (arg1)) | |
2464 | case scm_tc7_cxr: | |
2465 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
2466 | #ifdef SCM_FLOATS | |
2467 | if (SCM_SUBRF (proc)) | |
2468 | { | |
6dbd0af5 MD |
2469 | if (SCM_INUMP (arg1)) |
2470 | { | |
2471 | RETURN (scm_makdbl (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)), 0.0)); | |
2472 | } | |
0f2d19dd | 2473 | SCM_ASRTGO (SCM_NIMP (arg1), floerr); |
6dbd0af5 MD |
2474 | if (SCM_REALP (arg1)) |
2475 | { | |
2476 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (SCM_REALPART (arg1)), 0.0)); | |
2477 | } | |
0f2d19dd JB |
2478 | #ifdef SCM_BIGDIG |
2479 | if SCM_BIGP | |
2480 | (arg1) | |
2481 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (scm_big2dbl (arg1)), 0.0)) | |
2482 | #endif | |
2483 | floerr: | |
2484 | scm_wta (arg1, (char *) SCM_ARG1, SCM_CHARS (SCM_SNAME (proc))); | |
2485 | } | |
2486 | #endif | |
2487 | proc = (SCM) SCM_SNAME (proc); | |
2488 | { | |
2489 | char *chrs = SCM_CHARS (proc) + SCM_LENGTH (proc) - 1; | |
2490 | while ('c' != *--chrs) | |
2491 | { | |
2492 | SCM_ASSERT (SCM_NIMP (arg1) && SCM_CONSP (arg1), | |
2493 | arg1, SCM_ARG1, SCM_CHARS (proc)); | |
2494 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
2495 | } | |
2496 | RETURN (arg1) | |
2497 | } | |
2498 | case scm_tc7_subr_3: | |
2499 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CAR (SCM_CDR (args)))) | |
2500 | case scm_tc7_lsubr: | |
2501 | #ifdef DEVAL | |
6dbd0af5 | 2502 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)) |
0f2d19dd JB |
2503 | #else |
2504 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))) | |
2505 | #endif | |
2506 | case scm_tc7_lsubr_2: | |
2507 | SCM_ASRTGO (SCM_NIMP (args) && SCM_CONSP (args), wrongnumargs); | |
2508 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))) | |
2509 | case scm_tc7_asubr: | |
2510 | if (SCM_NULLP (args)) | |
2511 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)) | |
2512 | while (SCM_NIMP (args)) | |
2513 | { | |
2514 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
2515 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
2516 | args = SCM_CDR (args); | |
2517 | } | |
2518 | RETURN (arg1); | |
2519 | case scm_tc7_rpsubr: | |
2520 | if (SCM_NULLP (args)) | |
2521 | RETURN (SCM_BOOL_T); | |
2522 | while (SCM_NIMP (args)) | |
2523 | { | |
2524 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
2525 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
2526 | RETURN (SCM_BOOL_F); | |
2527 | arg1 = SCM_CAR (args); | |
2528 | args = SCM_CDR (args); | |
2529 | } | |
2530 | RETURN (SCM_BOOL_T); | |
2531 | case scm_tcs_closures: | |
2532 | #ifdef DEVAL | |
6dbd0af5 | 2533 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
2534 | #else |
2535 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
2536 | #endif | |
2537 | #ifndef RECKLESS | |
2538 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), arg1)) | |
2539 | goto wrongnumargs; | |
2540 | #endif | |
e2806c10 | 2541 | args = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), arg1, SCM_ENV (proc)); |
0f2d19dd JB |
2542 | proc = SCM_CODE (proc); |
2543 | while (SCM_NNULLP (proc = SCM_CDR (proc))) | |
2544 | arg1 = EVALCAR (proc, args); | |
2545 | RETURN (arg1); | |
2546 | case scm_tc7_contin: | |
2547 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
2548 | scm_call_continuation (proc, arg1); | |
2549 | #ifdef CCLO | |
2550 | case scm_tc7_cclo: | |
2551 | #ifdef DEVAL | |
6dbd0af5 MD |
2552 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
2553 | arg1 = proc; | |
2554 | proc = SCM_CCLO_SUBR (proc); | |
2555 | debug.vect[0].a.proc = proc; | |
2556 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
2557 | #else |
2558 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
2559 | arg1 = proc; |
2560 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 2561 | #endif |
0f2d19dd JB |
2562 | goto tail; |
2563 | #endif | |
2564 | wrongnumargs: | |
f5bf2977 | 2565 | scm_wrong_num_args (proc); |
0f2d19dd JB |
2566 | default: |
2567 | badproc: | |
2568 | scm_wta (proc, (char *) SCM_ARG1, "apply"); | |
2569 | RETURN (arg1); | |
2570 | } | |
2571 | #ifdef DEVAL | |
6dbd0af5 MD |
2572 | exit: |
2573 | if (CHECK_EXIT) | |
b7ff98dd | 2574 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 2575 | { |
b7ff98dd MD |
2576 | SCM_EXIT_FRAME_P = 0; |
2577 | SCM_RESET_DEBUG_MODE; | |
2578 | SCM_CLEAR_TRACED_FRAME (debug); | |
2579 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 2580 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
2581 | else |
2582 | { | |
2583 | scm_make_cont (&arg1); | |
c4ac4d88 | 2584 | if (safe_setjmp (SCM_JMPBUF (arg1))) |
6dbd0af5 MD |
2585 | { |
2586 | proc = SCM_THROW_VALUE (arg1); | |
2587 | goto ret; | |
2588 | } | |
2589 | } | |
2590 | scm_ithrow (scm_i_exit_frame, scm_cons2 (arg1, proc, SCM_EOL), 0); | |
2591 | } | |
2592 | ret: | |
1646d37b | 2593 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
2594 | return proc; |
2595 | #endif | |
2596 | } | |
2597 | ||
6dbd0af5 MD |
2598 | |
2599 | /* SECTION: The rest of this file is only read once. | |
2600 | */ | |
2601 | ||
0f2d19dd JB |
2602 | #ifndef DEVAL |
2603 | ||
2604 | SCM_PROC(s_map, "map", 2, 0, 1, scm_map); | |
1cc91f1b | 2605 | |
0f2d19dd JB |
2606 | SCM |
2607 | scm_map (proc, arg1, args) | |
2608 | SCM proc; | |
2609 | SCM arg1; | |
2610 | SCM args; | |
0f2d19dd JB |
2611 | { |
2612 | long i; | |
2613 | SCM res = SCM_EOL; | |
2614 | SCM *pres = &res; | |
2615 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
2616 | ||
2617 | if (SCM_NULLP (arg1)) | |
2618 | return res; | |
2619 | SCM_ASSERT (SCM_NIMP (arg1), arg1, SCM_ARG2, s_map); | |
2620 | if (SCM_NULLP (args)) | |
2621 | { | |
2622 | while (SCM_NIMP (arg1)) | |
2623 | { | |
2624 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG2, s_map); | |
2625 | *pres = scm_cons (scm_apply (proc, SCM_CAR (arg1), scm_listofnull), SCM_EOL); | |
a23afe53 | 2626 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
2627 | arg1 = SCM_CDR (arg1); |
2628 | } | |
2629 | return res; | |
2630 | } | |
2631 | args = scm_vector (scm_cons (arg1, args)); | |
2632 | ve = SCM_VELTS (args); | |
2633 | #ifndef RECKLESS | |
2634 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
2635 | SCM_ASSERT (SCM_NIMP (ve[i]) && SCM_CONSP (ve[i]), args, SCM_ARG2, s_map); | |
2636 | #endif | |
2637 | while (1) | |
2638 | { | |
2639 | arg1 = SCM_EOL; | |
2640 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
2641 | { | |
2642 | if SCM_IMP | |
2643 | (ve[i]) return res; | |
2644 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
2645 | ve[i] = SCM_CDR (ve[i]); | |
2646 | } | |
2647 | *pres = scm_cons (scm_apply (proc, arg1, SCM_EOL), SCM_EOL); | |
a23afe53 | 2648 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
2649 | } |
2650 | } | |
2651 | ||
2652 | ||
2653 | SCM_PROC(s_for_each, "for-each", 2, 0, 1, scm_for_each); | |
1cc91f1b | 2654 | |
0f2d19dd JB |
2655 | SCM |
2656 | scm_for_each (proc, arg1, args) | |
2657 | SCM proc; | |
2658 | SCM arg1; | |
2659 | SCM args; | |
0f2d19dd JB |
2660 | { |
2661 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
2662 | long i; | |
2663 | if SCM_NULLP (arg1) | |
2664 | return SCM_UNSPECIFIED; | |
2665 | SCM_ASSERT (SCM_NIMP (arg1), arg1, SCM_ARG2, s_for_each); | |
2666 | if SCM_NULLP (args) | |
2667 | { | |
2668 | while SCM_NIMP (arg1) | |
2669 | { | |
2670 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG2, s_for_each); | |
2671 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); | |
2672 | arg1 = SCM_CDR (arg1); | |
2673 | } | |
2674 | return SCM_UNSPECIFIED; | |
2675 | } | |
2676 | args = scm_vector (scm_cons (arg1, args)); | |
2677 | ve = SCM_VELTS (args); | |
2678 | #ifndef RECKLESS | |
2679 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
2680 | SCM_ASSERT (SCM_NIMP (ve[i]) && SCM_CONSP (ve[i]), args, SCM_ARG2, s_for_each); | |
2681 | #endif | |
2682 | while (1) | |
2683 | { | |
2684 | arg1 = SCM_EOL; | |
2685 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
2686 | { | |
2687 | if SCM_IMP | |
2688 | (ve[i]) return SCM_UNSPECIFIED; | |
2689 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
2690 | ve[i] = SCM_CDR (ve[i]); | |
2691 | } | |
2692 | scm_apply (proc, arg1, SCM_EOL); | |
2693 | } | |
2694 | } | |
2695 | ||
2696 | ||
1cc91f1b | 2697 | |
0f2d19dd JB |
2698 | SCM |
2699 | scm_closure (code, env) | |
2700 | SCM code; | |
2701 | SCM env; | |
0f2d19dd JB |
2702 | { |
2703 | register SCM z; | |
2704 | SCM_NEWCELL (z); | |
2705 | SCM_SETCODE (z, code); | |
a23afe53 | 2706 | SCM_SETENV (z, env); |
0f2d19dd JB |
2707 | return z; |
2708 | } | |
2709 | ||
2710 | ||
2711 | long scm_tc16_promise; | |
1cc91f1b | 2712 | |
0f2d19dd JB |
2713 | SCM |
2714 | scm_makprom (code) | |
2715 | SCM code; | |
0f2d19dd JB |
2716 | { |
2717 | register SCM z; | |
2718 | SCM_NEWCELL (z); | |
a23afe53 MD |
2719 | SCM_SETCDR (z, code); |
2720 | SCM_SETCAR (z, scm_tc16_promise); | |
0f2d19dd JB |
2721 | return z; |
2722 | } | |
2723 | ||
2724 | ||
1cc91f1b JB |
2725 | |
2726 | static int prinprom SCM_P ((SCM exp, SCM port, scm_print_state *pstate)); | |
2727 | ||
0f2d19dd | 2728 | static int |
19402679 | 2729 | prinprom (exp, port, pstate) |
0f2d19dd JB |
2730 | SCM exp; |
2731 | SCM port; | |
19402679 | 2732 | scm_print_state *pstate; |
0f2d19dd | 2733 | { |
19402679 | 2734 | int writingp = SCM_WRITINGP (pstate); |
0f2d19dd | 2735 | scm_gen_puts (scm_regular_string, "#<promise ", port); |
19402679 MD |
2736 | SCM_SET_WRITINGP (pstate, 1); |
2737 | scm_iprin1 (SCM_CDR (exp), port, pstate); | |
2738 | SCM_SET_WRITINGP (pstate, writingp); | |
0f2d19dd JB |
2739 | scm_gen_putc ('>', port); |
2740 | return !0; | |
2741 | } | |
2742 | ||
2743 | ||
2744 | SCM_PROC(s_makacro, "procedure->syntax", 1, 0, 0, scm_makacro); | |
1cc91f1b | 2745 | |
0f2d19dd JB |
2746 | SCM |
2747 | scm_makacro (code) | |
2748 | SCM code; | |
0f2d19dd JB |
2749 | { |
2750 | register SCM z; | |
2751 | SCM_NEWCELL (z); | |
a23afe53 MD |
2752 | SCM_SETCDR (z, code); |
2753 | SCM_SETCAR (z, scm_tc16_macro); | |
0f2d19dd JB |
2754 | return z; |
2755 | } | |
2756 | ||
2757 | ||
2758 | SCM_PROC(s_makmacro, "procedure->macro", 1, 0, 0, scm_makmacro); | |
1cc91f1b | 2759 | |
0f2d19dd JB |
2760 | SCM |
2761 | scm_makmacro (code) | |
2762 | SCM code; | |
0f2d19dd JB |
2763 | { |
2764 | register SCM z; | |
2765 | SCM_NEWCELL (z); | |
a23afe53 MD |
2766 | SCM_SETCDR (z, code); |
2767 | SCM_SETCAR (z, scm_tc16_macro | (1L << 16)); | |
0f2d19dd JB |
2768 | return z; |
2769 | } | |
2770 | ||
2771 | ||
2772 | SCM_PROC(s_makmmacro, "procedure->memoizing-macro", 1, 0, 0, scm_makmmacro); | |
1cc91f1b | 2773 | |
0f2d19dd JB |
2774 | SCM |
2775 | scm_makmmacro (code) | |
2776 | SCM code; | |
0f2d19dd JB |
2777 | { |
2778 | register SCM z; | |
2779 | SCM_NEWCELL (z); | |
a23afe53 MD |
2780 | SCM_SETCDR (z, code); |
2781 | SCM_SETCAR (z, scm_tc16_macro | (2L << 16)); | |
0f2d19dd JB |
2782 | return z; |
2783 | } | |
2784 | ||
2785 | ||
1cc91f1b JB |
2786 | |
2787 | static int prinmacro SCM_P ((SCM exp, SCM port, scm_print_state *pstate)); | |
2788 | ||
0f2d19dd | 2789 | static int |
19402679 | 2790 | prinmacro (exp, port, pstate) |
0f2d19dd JB |
2791 | SCM exp; |
2792 | SCM port; | |
19402679 | 2793 | scm_print_state *pstate; |
0f2d19dd | 2794 | { |
19402679 | 2795 | int writingp = SCM_WRITINGP (pstate); |
0f2d19dd JB |
2796 | if (SCM_CAR (exp) & (3L << 16)) |
2797 | scm_gen_puts (scm_regular_string, "#<macro", port); | |
2798 | else | |
2799 | scm_gen_puts (scm_regular_string, "#<syntax", port); | |
2800 | if (SCM_CAR (exp) & (2L << 16)) | |
2801 | scm_gen_putc ('!', port); | |
2802 | scm_gen_putc (' ', port); | |
19402679 MD |
2803 | SCM_SET_WRITINGP (pstate, 1); |
2804 | scm_iprin1 (SCM_CDR (exp), port, pstate); | |
2805 | SCM_SET_WRITINGP (pstate, writingp); | |
0f2d19dd JB |
2806 | scm_gen_putc ('>', port); |
2807 | return !0; | |
2808 | } | |
2809 | ||
2810 | SCM_PROC(s_force, "force", 1, 0, 0, scm_force); | |
1cc91f1b | 2811 | |
0f2d19dd JB |
2812 | SCM |
2813 | scm_force (x) | |
2814 | SCM x; | |
0f2d19dd JB |
2815 | { |
2816 | SCM_ASSERT ((SCM_TYP16 (x) == scm_tc16_promise), x, SCM_ARG1, s_force); | |
2817 | if (!((1L << 16) & SCM_CAR (x))) | |
2818 | { | |
2819 | SCM ans = scm_apply (SCM_CDR (x), SCM_EOL, SCM_EOL); | |
2820 | if (!((1L << 16) & SCM_CAR (x))) | |
2821 | { | |
2822 | SCM_DEFER_INTS; | |
a23afe53 MD |
2823 | SCM_SETCDR (x, ans); |
2824 | SCM_SETOR_CAR (x, (1L << 16)); | |
0f2d19dd JB |
2825 | SCM_ALLOW_INTS; |
2826 | } | |
2827 | } | |
2828 | return SCM_CDR (x); | |
2829 | } | |
2830 | ||
2831 | SCM_PROC (s_promise_p, "promise?", 1, 0, 0, scm_promise_p); | |
1cc91f1b | 2832 | |
0f2d19dd JB |
2833 | SCM |
2834 | scm_promise_p (x) | |
2835 | SCM x; | |
0f2d19dd JB |
2836 | { |
2837 | return ((SCM_NIMP (x) && (SCM_TYP16 (x) == scm_tc16_promise)) | |
2838 | ? SCM_BOOL_T | |
2839 | : SCM_BOOL_F); | |
2840 | } | |
2841 | ||
2842 | SCM_PROC(s_copy_tree, "copy-tree", 1, 0, 0, scm_copy_tree); | |
1cc91f1b | 2843 | |
0f2d19dd JB |
2844 | SCM |
2845 | scm_copy_tree (obj) | |
2846 | SCM obj; | |
0f2d19dd JB |
2847 | { |
2848 | SCM ans, tl; | |
2849 | if SCM_IMP | |
2850 | (obj) return obj; | |
2851 | if (SCM_VECTORP (obj)) | |
2852 | { | |
2853 | scm_sizet i = SCM_LENGTH (obj); | |
2854 | ans = scm_make_vector (SCM_MAKINUM (i), SCM_UNSPECIFIED, SCM_UNDEFINED); | |
2855 | while (i--) | |
2856 | SCM_VELTS (ans)[i] = scm_copy_tree (SCM_VELTS (obj)[i]); | |
2857 | return ans; | |
2858 | } | |
2859 | if SCM_NCONSP (obj) | |
2860 | return obj; | |
2861 | /* return scm_cons(scm_copy_tree(SCM_CAR(obj)), scm_copy_tree(SCM_CDR(obj))); */ | |
2862 | ans = tl = scm_cons (scm_copy_tree (SCM_CAR (obj)), SCM_UNSPECIFIED); | |
2863 | while (SCM_NIMP (obj = SCM_CDR (obj)) && SCM_CONSP (obj)) | |
a23afe53 MD |
2864 | { |
2865 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
2866 | SCM_UNSPECIFIED)); | |
2867 | tl = SCM_CDR (tl); | |
2868 | } | |
2869 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
2870 | return ans; |
2871 | } | |
2872 | ||
1cc91f1b | 2873 | |
0f2d19dd JB |
2874 | SCM |
2875 | scm_eval_3 (obj, copyp, env) | |
2876 | SCM obj; | |
2877 | int copyp; | |
2878 | SCM env; | |
0f2d19dd JB |
2879 | { |
2880 | if (SCM_NIMP (SCM_CDR (scm_system_transformer))) | |
2881 | obj = scm_apply (SCM_CDR (scm_system_transformer), obj, scm_listofnull); | |
2882 | else if (copyp) | |
2883 | obj = scm_copy_tree (obj); | |
6dbd0af5 | 2884 | return XEVAL (obj, env); |
0f2d19dd JB |
2885 | } |
2886 | ||
1cc91f1b | 2887 | |
0f2d19dd JB |
2888 | SCM |
2889 | scm_top_level_env (thunk) | |
2890 | SCM thunk; | |
0f2d19dd JB |
2891 | { |
2892 | if (SCM_IMP(thunk)) | |
2893 | return SCM_EOL; | |
2894 | else | |
2895 | return scm_cons(thunk, (SCM)SCM_EOL); | |
2896 | } | |
2897 | ||
2898 | SCM_PROC(s_eval2, "eval2", 2, 0, 0, scm_eval2); | |
1cc91f1b | 2899 | |
0f2d19dd JB |
2900 | SCM |
2901 | scm_eval2 (obj, env_thunk) | |
2902 | SCM obj; | |
2903 | SCM env_thunk; | |
0f2d19dd JB |
2904 | { |
2905 | return scm_eval_3 (obj, 1, scm_top_level_env(env_thunk)); | |
2906 | } | |
2907 | ||
2908 | SCM_PROC(s_eval, "eval", 1, 0, 0, scm_eval); | |
1cc91f1b | 2909 | |
0f2d19dd JB |
2910 | SCM |
2911 | scm_eval (obj) | |
2912 | SCM obj; | |
0f2d19dd JB |
2913 | { |
2914 | return | |
dc19d1d2 | 2915 | scm_eval_3(obj, 1, scm_top_level_env(SCM_CDR(scm_top_level_lookup_closure_var))); |
0f2d19dd JB |
2916 | } |
2917 | ||
11f77bfc | 2918 | /* SCM_PROC(s_eval_x, "eval!", 1, 0, 0, scm_eval_x); */ |
1cc91f1b | 2919 | |
0f2d19dd JB |
2920 | SCM |
2921 | scm_eval_x (obj) | |
2922 | SCM obj; | |
0f2d19dd JB |
2923 | { |
2924 | return | |
2925 | scm_eval_3(obj, | |
2926 | 0, | |
dc19d1d2 | 2927 | scm_top_level_env (SCM_CDR (scm_top_level_lookup_closure_var))); |
0f2d19dd JB |
2928 | } |
2929 | ||
2930 | SCM_PROC (s_macro_eval_x, "macro-eval!", 2, 0, 0, scm_macro_eval_x); | |
1cc91f1b | 2931 | |
0f2d19dd JB |
2932 | SCM |
2933 | scm_macro_eval_x (exp, env) | |
2934 | SCM exp; | |
2935 | SCM env; | |
0f2d19dd JB |
2936 | { |
2937 | return scm_eval_3 (exp, 0, env); | |
2938 | } | |
2939 | ||
1cc91f1b | 2940 | |
ee33f8fa MV |
2941 | SCM_PROC (s_definedp, "defined?", 1, 0, 0, scm_definedp); |
2942 | ||
0f2d19dd | 2943 | SCM |
ee33f8fa MV |
2944 | scm_definedp (sym) |
2945 | SCM sym; | |
0f2d19dd | 2946 | { |
ee33f8fa MV |
2947 | SCM vcell; |
2948 | ||
2949 | if (SCM_ISYMP (sym)) | |
0f2d19dd | 2950 | return SCM_BOOL_T; |
ee33f8fa MV |
2951 | |
2952 | SCM_ASSERT (SCM_NIMP (sym) && SCM_SYMBOLP (sym), sym, SCM_ARG1, s_definedp); | |
2953 | ||
2954 | vcell = scm_sym2vcell(sym, | |
0aa1e432 | 2955 | SCM_CDR (scm_top_level_lookup_closure_var), |
ee33f8fa MV |
2956 | SCM_BOOL_F); |
2957 | return (vcell == SCM_BOOL_F || SCM_UNBNDP(SCM_CDR(vcell))) ? | |
2958 | SCM_BOOL_F : SCM_BOOL_T; | |
0f2d19dd JB |
2959 | } |
2960 | ||
2961 | static scm_smobfuns promsmob = | |
2962 | {scm_markcdr, scm_free0, prinprom}; | |
2963 | ||
2964 | static scm_smobfuns macrosmob = | |
2965 | {scm_markcdr, scm_free0, prinmacro}; | |
2966 | ||
1cc91f1b | 2967 | |
0f2d19dd JB |
2968 | SCM |
2969 | scm_make_synt (name, macroizer, fcn) | |
2970 | char *name; | |
2971 | SCM (*macroizer) (); | |
2972 | SCM (*fcn) (); | |
0f2d19dd JB |
2973 | { |
2974 | SCM symcell = scm_sysintern (name, SCM_UNDEFINED); | |
2975 | long tmp = ((((SCM_CELLPTR) (SCM_CAR (symcell))) - scm_heap_org) << 8); | |
2976 | register SCM z; | |
2977 | if ((tmp >> 8) != ((SCM_CELLPTR) (SCM_CAR (symcell)) - scm_heap_org)) | |
2978 | tmp = 0; | |
2979 | SCM_NEWCELL (z); | |
2980 | SCM_SUBRF (z) = fcn; | |
a23afe53 MD |
2981 | SCM_SETCAR (z, tmp + scm_tc7_subr_2); |
2982 | SCM_SETCDR (symcell, macroizer (z)); | |
0f2d19dd JB |
2983 | return SCM_CAR (symcell); |
2984 | } | |
2985 | ||
6dbd0af5 MD |
2986 | |
2987 | /* At this point, scm_deval and scm_dapply are generated. | |
2988 | */ | |
2989 | ||
0f2d19dd | 2990 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
2991 | # define DEVAL |
2992 | # include "eval.c" | |
0f2d19dd JB |
2993 | #endif |
2994 | ||
2995 | ||
1cc91f1b | 2996 | |
0f2d19dd JB |
2997 | void |
2998 | scm_init_eval () | |
0f2d19dd | 2999 | { |
0f2d19dd JB |
3000 | scm_tc16_promise = scm_newsmob (&promsmob); |
3001 | scm_tc16_macro = scm_newsmob (¯osmob); | |
3002 | scm_i_apply = scm_make_subr ("apply", scm_tc7_lsubr_2, scm_apply); | |
3003 | scm_system_transformer = scm_sysintern ("scm:eval-transformer", SCM_UNDEFINED); | |
3004 | scm_i_dot = SCM_CAR (scm_sysintern (".", SCM_UNDEFINED)); | |
3005 | scm_i_arrow = SCM_CAR (scm_sysintern ("=>", SCM_UNDEFINED)); | |
3006 | scm_i_else = SCM_CAR (scm_sysintern ("else", SCM_UNDEFINED)); | |
3007 | scm_i_unquote = SCM_CAR (scm_sysintern ("unquote", SCM_UNDEFINED)); | |
3008 | scm_i_uq_splicing = SCM_CAR (scm_sysintern ("unquote-splicing", SCM_UNDEFINED)); | |
3009 | ||
3010 | /* acros */ | |
3011 | scm_i_quasiquote = scm_make_synt (s_quasiquote, scm_makacro, scm_m_quasiquote); | |
6dbd0af5 | 3012 | scm_make_synt (s_undefine, scm_makacro, scm_m_undefine); |
0f2d19dd JB |
3013 | scm_make_synt (s_delay, scm_makacro, scm_m_delay); |
3014 | /* end of acros */ | |
3015 | ||
dc19d1d2 JB |
3016 | scm_top_level_lookup_closure_var = |
3017 | scm_sysintern("*top-level-lookup-closure*", SCM_BOOL_F); | |
9b8d3288 | 3018 | scm_can_use_top_level_lookup_closure_var = 1; |
0f2d19dd | 3019 | |
6dbd0af5 MD |
3020 | scm_i_and = scm_make_synt ("and", scm_makmmacro, scm_m_and); |
3021 | scm_i_begin = scm_make_synt ("begin", scm_makmmacro, scm_m_begin); | |
3022 | scm_i_case = scm_make_synt ("case", scm_makmmacro, scm_m_case); | |
3023 | scm_i_cond = scm_make_synt ("cond", scm_makmmacro, scm_m_cond); | |
3024 | scm_i_define = scm_make_synt ("define", scm_makmmacro, scm_m_define); | |
3025 | scm_i_do = scm_make_synt ("do", scm_makmmacro, scm_m_do); | |
3026 | scm_i_if = scm_make_synt ("if", scm_makmmacro, scm_m_if); | |
0f2d19dd JB |
3027 | scm_i_lambda = scm_make_synt ("lambda", scm_makmmacro, scm_m_lambda); |
3028 | scm_i_let = scm_make_synt ("let", scm_makmmacro, scm_m_let); | |
6dbd0af5 MD |
3029 | scm_i_letrec = scm_make_synt ("letrec", scm_makmmacro, scm_m_letrec); |
3030 | scm_i_letstar = scm_make_synt ("let*", scm_makmmacro, scm_m_letstar); | |
3031 | scm_i_or = scm_make_synt ("or", scm_makmmacro, scm_m_or); | |
0f2d19dd | 3032 | scm_i_quote = scm_make_synt ("quote", scm_makmmacro, scm_m_quote); |
6dbd0af5 MD |
3033 | scm_i_set = scm_make_synt ("set!", scm_makmmacro, scm_m_set); |
3034 | scm_i_atapply = scm_make_synt ("@apply", scm_makmmacro, scm_m_apply); | |
3035 | scm_i_atcall_cc = scm_make_synt ("@call-with-current-continuation", | |
3036 | scm_makmmacro, scm_m_cont); | |
3037 | ||
6dbd0af5 MD |
3038 | #ifdef DEBUG_EXTENSIONS |
3039 | scm_i_enter_frame = SCM_CAR (scm_sysintern ("enter-frame", SCM_UNDEFINED)); | |
3040 | scm_i_apply_frame = SCM_CAR (scm_sysintern ("apply-frame", SCM_UNDEFINED)); | |
3041 | scm_i_exit_frame = SCM_CAR (scm_sysintern ("exit-frame", SCM_UNDEFINED)); | |
3042 | scm_i_trace = SCM_CAR (scm_sysintern ("trace", SCM_UNDEFINED)); | |
3043 | #endif | |
3044 | ||
0f2d19dd JB |
3045 | #include "eval.x" |
3046 | } | |
0f2d19dd | 3047 | |
6dbd0af5 | 3048 | #endif /* !DEVAL */ |