Commit | Line | Data |
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b7f3516f | 1 | /* Copyright (C) 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 | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
0f2d19dd JB |
41 | \f |
42 | ||
43 | #include <stdio.h> | |
44 | #include "_scm.h" | |
20e6290e | 45 | #include "chars.h" |
bafcafb2 | 46 | #include "genio.h" |
916d65b1 | 47 | #include "eval.h" |
20e6290e JB |
48 | |
49 | #include "struct.h" | |
0f2d19dd | 50 | |
95b88819 GH |
51 | #ifdef HAVE_STRING_H |
52 | #include <string.h> | |
53 | #endif | |
54 | ||
0f2d19dd JB |
55 | \f |
56 | ||
57 | static SCM required_vtable_fields = SCM_BOOL_F; | |
58 | static int struct_num = 0; | |
59 | ||
60 | \f | |
61 | SCM_PROC (s_struct_make_layout, "make-struct-layout", 1, 0, 0, scm_make_struct_layout); | |
1cc91f1b | 62 | |
0f2d19dd JB |
63 | SCM |
64 | scm_make_struct_layout (fields) | |
65 | SCM fields; | |
0f2d19dd JB |
66 | { |
67 | SCM new_sym; | |
68 | SCM_ASSERT (SCM_NIMP (fields) && SCM_ROSTRINGP (fields), | |
69 | fields, SCM_ARG1, s_struct_make_layout); | |
70 | ||
71 | { | |
72 | char * field_desc; | |
73 | int len; | |
74 | int x; | |
75 | ||
76 | len = SCM_ROLENGTH (fields); | |
77 | field_desc = SCM_ROCHARS (fields); | |
78 | SCM_ASSERT (!(len & 1), fields, "odd length field specification", s_struct_make_layout); | |
79 | ||
80 | for (x = 0; x < len; x += 2) | |
81 | { | |
82 | switch (field_desc[x]) | |
83 | { | |
84 | case 'u': | |
85 | case 'p': | |
86 | #if 0 | |
87 | case 'i': | |
88 | case 'd': | |
89 | #endif | |
90 | case 's': | |
91 | break; | |
92 | default: | |
93 | SCM_ASSERT (0, SCM_MAKICHR (field_desc[x]) , "unrecognized field type", s_struct_make_layout); | |
94 | } | |
95 | ||
96 | switch (field_desc[x + 1]) | |
97 | { | |
98 | case 'w': | |
2c36c351 | 99 | SCM_ASSERT (field_desc[x] != 's', SCM_MAKICHR (field_desc[x + 1]), |
0f2d19dd JB |
100 | "self fields not writable", s_struct_make_layout); |
101 | ||
102 | case 'r': | |
103 | case 'o': | |
104 | break; | |
2c36c351 MD |
105 | case 'R': |
106 | case 'W': | |
107 | case 'O': | |
108 | SCM_ASSERT (field_desc[x] != 's', SCM_MAKICHR (field_desc[x + 1]), | |
109 | "self fields not allowed in tail array", | |
110 | s_struct_make_layout); | |
111 | SCM_ASSERT (x == len - 2, SCM_MAKICHR (field_desc[x + 1]), | |
112 | "tail array field must be last field in layout", | |
113 | s_struct_make_layout); | |
114 | break; | |
0f2d19dd JB |
115 | default: |
116 | SCM_ASSERT (0, SCM_MAKICHR (field_desc[x]) , "unrecognized ref specification", s_struct_make_layout); | |
117 | } | |
118 | #if 0 | |
119 | if (field_desc[x] == 'd') | |
120 | { | |
121 | SCM_ASSERT (field_desc[x + 2] == '-', SCM_MAKINUM (x / 2), "missing dash field", s_struct_make_layout); | |
122 | x += 2; | |
123 | goto recheck_ref; | |
124 | } | |
125 | #endif | |
126 | } | |
127 | new_sym = SCM_CAR (scm_intern_obarray (field_desc, len, SCM_BOOL_F)); | |
128 | } | |
129 | return scm_return_first (new_sym, fields); | |
130 | } | |
131 | ||
132 | \f | |
133 | ||
134 | ||
1cc91f1b JB |
135 | |
136 | static void init_struct SCM_P ((SCM handle, int tail_elts, SCM inits)); | |
137 | ||
0f2d19dd JB |
138 | static void |
139 | init_struct (handle, tail_elts, inits) | |
140 | SCM handle; | |
2c36c351 | 141 | int tail_elts; |
0f2d19dd | 142 | SCM inits; |
0f2d19dd JB |
143 | { |
144 | SCM layout; | |
145 | SCM * data; | |
146 | unsigned char * fields_desc; | |
35de7ebe | 147 | unsigned char prot = 0; |
0f2d19dd JB |
148 | int n_fields; |
149 | SCM * mem; | |
2c36c351 MD |
150 | int tailp = 0; |
151 | ||
0f2d19dd JB |
152 | layout = SCM_STRUCT_LAYOUT (handle); |
153 | data = SCM_STRUCT_DATA (handle); | |
2c36c351 | 154 | fields_desc = (unsigned char *) SCM_CHARS (layout) - 2; |
0f2d19dd JB |
155 | n_fields = SCM_LENGTH (layout) / 2; |
156 | mem = SCM_STRUCT_DATA (handle); | |
157 | while (n_fields) | |
158 | { | |
2c36c351 MD |
159 | if (!tailp) |
160 | { | |
161 | fields_desc += 2; | |
162 | prot = fields_desc[1]; | |
163 | if (SCM_LAYOUT_TAILP (prot)) | |
164 | { | |
165 | tailp = 1; | |
166 | prot = prot == 'R' ? 'r' : prot == 'W' ? 'w' : 'o'; | |
167 | *mem++ = tail_elts; | |
168 | n_fields += tail_elts - 1; | |
169 | if (n_fields == 0) | |
170 | break; | |
171 | } | |
172 | } | |
173 | ||
0f2d19dd JB |
174 | switch (*fields_desc) |
175 | { | |
176 | #if 0 | |
177 | case 'i': | |
2c36c351 | 178 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
0f2d19dd JB |
179 | *mem = 0; |
180 | else | |
181 | { | |
182 | *mem = scm_num2long (SCM_CAR (inits), SCM_ARGn, "init_struct"); | |
183 | inits = SCM_CDR (inits); | |
184 | } | |
185 | break; | |
186 | #endif | |
187 | ||
188 | case 'u': | |
2c36c351 | 189 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
0f2d19dd JB |
190 | *mem = 0; |
191 | else | |
192 | { | |
193 | *mem = scm_num2ulong (SCM_CAR (inits), SCM_ARGn, "init_struct"); | |
194 | inits = SCM_CDR (inits); | |
195 | } | |
196 | break; | |
197 | ||
198 | case 'p': | |
2c36c351 | 199 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
916d65b1 | 200 | *mem = SCM_BOOL_F; |
0f2d19dd JB |
201 | else |
202 | { | |
203 | *mem = SCM_CAR (inits); | |
204 | inits = SCM_CDR (inits); | |
205 | } | |
206 | ||
207 | break; | |
208 | ||
209 | #if 0 | |
210 | case 'd': | |
2c36c351 | 211 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
0f2d19dd JB |
212 | *((double *)mem) = 0.0; |
213 | else | |
214 | { | |
215 | *mem = scm_num2dbl (SCM_CAR (inits), "init_struct"); | |
216 | inits = SCM_CDR (inits); | |
217 | } | |
218 | fields_desc += 2; | |
219 | break; | |
220 | #endif | |
221 | ||
222 | case 's': | |
223 | *mem = handle; | |
224 | break; | |
225 | } | |
226 | ||
0f2d19dd JB |
227 | n_fields--; |
228 | mem++; | |
229 | } | |
230 | } | |
231 | ||
232 | ||
233 | SCM_PROC (s_struct_p, "struct?", 1, 0, 0, scm_struct_p); | |
1cc91f1b | 234 | |
0f2d19dd JB |
235 | SCM |
236 | scm_struct_p (x) | |
237 | SCM x; | |
0f2d19dd JB |
238 | { |
239 | return ((SCM_NIMP (x) && SCM_STRUCTP (x)) | |
240 | ? SCM_BOOL_T | |
241 | : SCM_BOOL_F); | |
242 | } | |
243 | ||
244 | SCM_PROC (s_struct_vtable_p, "struct-vtable?", 1, 0, 0, scm_struct_vtable_p); | |
1cc91f1b | 245 | |
0f2d19dd JB |
246 | SCM |
247 | scm_struct_vtable_p (x) | |
248 | SCM x; | |
0f2d19dd JB |
249 | { |
250 | SCM layout; | |
251 | SCM * mem; | |
252 | ||
253 | if (SCM_IMP (x)) | |
254 | return SCM_BOOL_F; | |
255 | ||
256 | if (!SCM_STRUCTP (x)) | |
257 | return SCM_BOOL_F; | |
258 | ||
259 | layout = SCM_STRUCT_LAYOUT (x); | |
260 | ||
261 | if (SCM_LENGTH (layout) < SCM_LENGTH (required_vtable_fields)) | |
262 | return SCM_BOOL_F; | |
263 | ||
264 | if (strncmp (SCM_CHARS (layout), SCM_CHARS (required_vtable_fields), | |
265 | SCM_LENGTH (required_vtable_fields))) | |
266 | return SCM_BOOL_F; | |
267 | ||
268 | mem = SCM_STRUCT_DATA (x); | |
269 | ||
270 | if (mem[1] != 0) | |
271 | return SCM_BOOL_F; | |
272 | ||
273 | if (SCM_IMP (mem[0])) | |
274 | return SCM_BOOL_F; | |
275 | ||
276 | return (SCM_SYMBOLP (mem[0]) | |
277 | ? SCM_BOOL_T | |
278 | : SCM_BOOL_F); | |
279 | } | |
280 | ||
14d1400f JB |
281 | |
282 | /* All struct data must be allocated at an address whose bottom three | |
283 | bits are zero. This is because the tag for a struct lives in the | |
284 | bottom three bits of the struct's car, and the upper bits point to | |
285 | the data of its vtable, which is a struct itself. Thus, if the | |
286 | address of that data doesn't end in three zeros, tagging it will | |
287 | destroy the pointer. | |
288 | ||
289 | This function allocates a block of memory, and returns a pointer at | |
290 | least scm_struct_n_extra_words words into the block. Furthermore, | |
291 | it guarantees that that pointer's least three significant bits are | |
292 | all zero. | |
293 | ||
294 | The argument n_words should be the number of words that should | |
295 | appear after the returned address. (That is, it shouldn't include | |
296 | scm_struct_n_extra_words.) | |
297 | ||
298 | This function initializes the following fields of the struct: | |
299 | ||
300 | scm_struct_i_ptr --- the actual stort of the block of memory; the | |
301 | address you should pass to 'free' to dispose of the block. | |
302 | This field allows us to both guarantee that the returned | |
303 | address is divisible by eight, and allow the GC to free the | |
304 | block. | |
305 | ||
306 | scm_struct_i_n_words --- the number of words allocated to the | |
307 | block, including the extra fields. This is used by the GC. | |
308 | ||
309 | scm_struct_i_tag --- a unique tag assigned to this struct, | |
310 | allocated according to struct_num. | |
311 | ||
312 | Ugh. */ | |
313 | ||
314 | ||
315 | static SCM *alloc_struct SCM_P ((int n_words, char *who)); | |
316 | ||
317 | static SCM * | |
318 | alloc_struct (n_words, who) | |
319 | int n_words; | |
320 | char *who; | |
321 | { | |
322 | int size = sizeof (SCM) * (n_words + scm_struct_n_extra_words) + 7; | |
323 | SCM *block = (SCM *) scm_must_malloc (size, who); | |
324 | ||
325 | /* Adjust the pointer to hide the extra words. */ | |
326 | SCM *p = block + scm_struct_n_extra_words; | |
327 | ||
328 | /* Adjust it even further so it's aligned on an eight-byte boundary. */ | |
329 | p = (SCM *) (((SCM) p + 7) & ~7); | |
330 | ||
331 | /* Initialize a few fields as described above. */ | |
332 | p[scm_struct_i_ptr] = (SCM) block; | |
333 | p[scm_struct_i_n_words] = (SCM) (scm_struct_n_extra_words + n_words); | |
334 | p[scm_struct_i_tag] = struct_num++; | |
335 | ||
336 | return p; | |
337 | } | |
338 | ||
339 | ||
0f2d19dd | 340 | SCM_PROC (s_make_struct, "make-struct", 2, 0, 1, scm_make_struct); |
1cc91f1b | 341 | |
0f2d19dd JB |
342 | SCM |
343 | scm_make_struct (vtable, tail_array_size, init) | |
344 | SCM vtable; | |
345 | SCM tail_array_size; | |
346 | SCM init; | |
0f2d19dd JB |
347 | { |
348 | SCM layout; | |
349 | int basic_size; | |
350 | int tail_elts; | |
351 | SCM * data; | |
352 | SCM handle; | |
353 | ||
354 | SCM_ASSERT ((SCM_BOOL_F != scm_struct_vtable_p (vtable)), | |
355 | vtable, SCM_ARG1, s_make_struct); | |
14d1400f JB |
356 | SCM_ASSERT (SCM_INUMP (tail_array_size), tail_array_size, SCM_ARG2, |
357 | s_make_struct); | |
0f2d19dd | 358 | |
4bfdf158 | 359 | layout = SCM_STRUCT_DATA (vtable)[scm_vtable_index_layout]; |
0f2d19dd JB |
360 | basic_size = SCM_LENGTH (layout) / 2; |
361 | tail_elts = SCM_INUM (tail_array_size); | |
362 | SCM_NEWCELL (handle); | |
363 | SCM_DEFER_INTS; | |
14d1400f | 364 | data = alloc_struct (basic_size + tail_elts, "make-struct"); |
0f2d19dd | 365 | SCM_SETCDR (handle, data); |
35457f1e | 366 | SCM_SETCAR (handle, ((SCM)SCM_STRUCT_DATA (vtable)) + scm_tc3_cons_gloc); |
0f2d19dd JB |
367 | init_struct (handle, tail_elts, init); |
368 | SCM_ALLOW_INTS; | |
369 | return handle; | |
370 | } | |
371 | ||
372 | ||
373 | ||
374 | SCM_PROC (s_make_vtable_vtable, "make-vtable-vtable", 2, 0, 1, scm_make_vtable_vtable); | |
1cc91f1b | 375 | |
0f2d19dd JB |
376 | SCM |
377 | scm_make_vtable_vtable (extra_fields, tail_array_size, init) | |
378 | SCM extra_fields; | |
379 | SCM tail_array_size; | |
380 | SCM init; | |
0f2d19dd JB |
381 | { |
382 | SCM fields; | |
383 | SCM layout; | |
384 | int basic_size; | |
385 | int tail_elts; | |
386 | SCM * data; | |
387 | SCM handle; | |
388 | ||
389 | SCM_ASSERT (SCM_NIMP (extra_fields) && SCM_ROSTRINGP (extra_fields), | |
390 | extra_fields, SCM_ARG1, s_make_vtable_vtable); | |
14d1400f JB |
391 | SCM_ASSERT (SCM_INUMP (tail_array_size), tail_array_size, SCM_ARG2, |
392 | s_make_vtable_vtable); | |
0f2d19dd JB |
393 | |
394 | fields = scm_string_append (scm_listify (required_vtable_fields, | |
395 | extra_fields, | |
396 | SCM_UNDEFINED)); | |
397 | layout = scm_make_struct_layout (fields); | |
398 | basic_size = SCM_LENGTH (layout) / 2; | |
399 | tail_elts = SCM_INUM (tail_array_size); | |
400 | SCM_NEWCELL (handle); | |
401 | SCM_DEFER_INTS; | |
14d1400f | 402 | data = alloc_struct (basic_size + tail_elts, "make-vtable-vtable"); |
0f2d19dd | 403 | SCM_SETCDR (handle, data); |
35457f1e | 404 | SCM_SETCAR (handle, ((SCM)data) + scm_tc3_cons_gloc); |
0f2d19dd JB |
405 | SCM_STRUCT_LAYOUT (handle) = layout; |
406 | init_struct (handle, tail_elts, scm_cons (layout, init)); | |
407 | SCM_ALLOW_INTS; | |
408 | return handle; | |
409 | } | |
410 | ||
411 | \f | |
412 | ||
413 | ||
414 | SCM_PROC (s_struct_ref, "struct-ref", 2, 0, 0, scm_struct_ref); | |
1cc91f1b | 415 | |
0f2d19dd JB |
416 | SCM |
417 | scm_struct_ref (handle, pos) | |
418 | SCM handle; | |
419 | SCM pos; | |
0f2d19dd | 420 | { |
5e840c2e | 421 | SCM answer = SCM_UNDEFINED; |
0f2d19dd JB |
422 | SCM * data; |
423 | SCM layout; | |
424 | int p; | |
425 | int n_fields; | |
426 | unsigned char * fields_desc; | |
427 | unsigned char field_type; | |
428 | ||
429 | ||
430 | SCM_ASSERT (SCM_NIMP (handle) && SCM_STRUCTP (handle), handle, | |
431 | SCM_ARG1, s_struct_ref); | |
432 | SCM_ASSERT (SCM_INUMP (pos), pos, SCM_ARG2, s_struct_ref); | |
433 | ||
434 | layout = SCM_STRUCT_LAYOUT (handle); | |
435 | data = SCM_STRUCT_DATA (handle); | |
436 | p = SCM_INUM (pos); | |
437 | ||
438 | fields_desc = (unsigned char *)SCM_CHARS (layout); | |
bafcafb2 | 439 | n_fields = data[scm_struct_i_n_words] - scm_struct_n_extra_words; |
2c36c351 MD |
440 | |
441 | SCM_ASSERT (p < n_fields, pos, SCM_OUTOFRANGE, s_struct_ref); | |
0f2d19dd | 442 | |
2c36c351 MD |
443 | if (p * 2 < SCM_LENGTH (layout)) |
444 | { | |
445 | unsigned char ref; | |
446 | field_type = fields_desc[p * 2]; | |
447 | ref = fields_desc[p * 2 + 1]; | |
448 | if ((ref != 'r') && (ref != 'w')) | |
449 | { | |
450 | if ((ref == 'R') || (ref == 'W')) | |
451 | field_type = 'u'; | |
452 | else | |
453 | SCM_ASSERT (0, pos, "ref denied", s_struct_ref); | |
454 | } | |
455 | } | |
456 | else if (fields_desc[SCM_LENGTH (layout) - 1] != 'O') | |
457 | field_type = fields_desc[SCM_LENGTH (layout) - 2]; | |
458 | else | |
459 | { | |
460 | SCM_ASSERT (0, pos, "ref denied", s_struct_ref); | |
35de7ebe | 461 | abort (); |
2c36c351 MD |
462 | } |
463 | ||
0f2d19dd JB |
464 | switch (field_type) |
465 | { | |
466 | case 'u': | |
467 | answer = scm_ulong2num (data[p]); | |
468 | break; | |
469 | ||
470 | #if 0 | |
471 | case 'i': | |
472 | answer = scm_long2num (data[p]); | |
473 | break; | |
474 | ||
475 | case 'd': | |
476 | answer = scm_makdbl (*((double *)&(data[p])), 0.0); | |
477 | break; | |
478 | #endif | |
479 | ||
480 | case 's': | |
481 | case 'p': | |
482 | answer = data[p]; | |
483 | break; | |
484 | ||
485 | ||
486 | default: | |
487 | SCM_ASSERT (0, SCM_MAKICHR (field_type), "unrecognized field type", s_struct_ref); | |
488 | break; | |
489 | } | |
490 | ||
491 | return answer; | |
492 | } | |
493 | ||
494 | ||
495 | SCM_PROC (s_struct_set_x, "struct-set!", 3, 0, 0, scm_struct_set_x); | |
1cc91f1b | 496 | |
0f2d19dd JB |
497 | SCM |
498 | scm_struct_set_x (handle, pos, val) | |
499 | SCM handle; | |
500 | SCM pos; | |
501 | SCM val; | |
0f2d19dd JB |
502 | { |
503 | SCM * data; | |
504 | SCM layout; | |
505 | int p; | |
506 | int n_fields; | |
507 | unsigned char * fields_desc; | |
508 | unsigned char field_type; | |
509 | ||
510 | ||
511 | ||
512 | SCM_ASSERT (SCM_NIMP (handle) && SCM_STRUCTP (handle), handle, | |
513 | SCM_ARG1, s_struct_ref); | |
514 | SCM_ASSERT (SCM_INUMP (pos), pos, SCM_ARG2, s_struct_ref); | |
515 | ||
516 | layout = SCM_STRUCT_LAYOUT (handle); | |
517 | data = SCM_STRUCT_DATA (handle); | |
518 | p = SCM_INUM (pos); | |
519 | ||
520 | fields_desc = (unsigned char *)SCM_CHARS (layout); | |
bafcafb2 | 521 | n_fields = data[scm_struct_i_n_words] - scm_struct_n_extra_words; |
0f2d19dd | 522 | |
2c36c351 | 523 | SCM_ASSERT (p < n_fields, pos, SCM_OUTOFRANGE, s_struct_set_x); |
0f2d19dd | 524 | |
2c36c351 MD |
525 | if (p * 2 < SCM_LENGTH (layout)) |
526 | { | |
527 | unsigned char set_x; | |
528 | field_type = fields_desc[p * 2]; | |
529 | set_x = fields_desc [p * 2 + 1]; | |
530 | if (set_x != 'w') | |
531 | SCM_ASSERT (0, pos, "set_x denied", s_struct_set_x); | |
532 | } | |
533 | else if (fields_desc[SCM_LENGTH (layout) - 1] == 'W') | |
534 | field_type = fields_desc[SCM_LENGTH (layout) - 2]; | |
535 | else | |
536 | { | |
537 | SCM_ASSERT (0, pos, "set_x denied", s_struct_ref); | |
35de7ebe | 538 | abort (); |
2c36c351 MD |
539 | } |
540 | ||
0f2d19dd JB |
541 | switch (field_type) |
542 | { | |
543 | case 'u': | |
544 | data[p] = (SCM)scm_num2ulong (val, (char *)SCM_ARG3, s_struct_set_x); | |
545 | break; | |
546 | ||
547 | #if 0 | |
548 | case 'i': | |
549 | data[p] = scm_num2long (val, (char *)SCM_ARG3, s_struct_set_x); | |
550 | break; | |
551 | ||
552 | case 'd': | |
553 | *((double *)&(data[p])) = scm_num2dbl (val, (char *)SCM_ARG3); | |
554 | break; | |
555 | #endif | |
556 | ||
557 | case 'p': | |
558 | data[p] = val; | |
559 | break; | |
560 | ||
561 | case 's': | |
562 | SCM_ASSERT (0, SCM_MAKICHR (field_type), "self fields immutable", s_struct_set_x); | |
563 | break; | |
564 | ||
565 | default: | |
566 | SCM_ASSERT (0, SCM_MAKICHR (field_type), "unrecognized field type", s_struct_set_x); | |
567 | break; | |
568 | } | |
569 | ||
570 | return val; | |
571 | } | |
572 | ||
573 | ||
574 | SCM_PROC (s_struct_vtable, "struct-vtable", 1, 0, 0, scm_struct_vtable); | |
1cc91f1b | 575 | |
0f2d19dd JB |
576 | SCM |
577 | scm_struct_vtable (handle) | |
578 | SCM handle; | |
0f2d19dd JB |
579 | { |
580 | SCM_ASSERT (SCM_NIMP (handle) && SCM_STRUCTP (handle), handle, | |
581 | SCM_ARG1, s_struct_vtable); | |
582 | return SCM_STRUCT_VTABLE (handle); | |
583 | } | |
584 | ||
585 | ||
586 | SCM_PROC (s_struct_vtable_tag, "struct-vtable-tag", 1, 0, 0, scm_struct_vtable_tag); | |
1cc91f1b | 587 | |
0f2d19dd JB |
588 | SCM |
589 | scm_struct_vtable_tag (handle) | |
590 | SCM handle; | |
0f2d19dd JB |
591 | { |
592 | SCM_ASSERT (SCM_NIMP (handle) && (SCM_BOOL_F != scm_struct_vtable_p (handle)), | |
593 | handle, SCM_ARG1, s_struct_vtable_tag); | |
594 | return scm_long2num (SCM_STRUCT_DATA (handle)[-1]); | |
595 | } | |
596 | ||
597 | ||
598 | \f | |
599 | ||
bafcafb2 MV |
600 | void |
601 | scm_print_struct (exp, port, pstate) | |
602 | SCM exp; | |
603 | SCM port; | |
604 | scm_print_state *pstate; | |
605 | { | |
4bfdf158 MD |
606 | if (SCM_NFALSEP (scm_procedure_p (SCM_STRUCT_PRINTER (exp)))) |
607 | scm_printer_apply (SCM_STRUCT_PRINTER (exp), exp, port, pstate); | |
608 | else | |
bafcafb2 | 609 | { |
b7f3516f | 610 | scm_lfwrite ("#<struct ", sizeof ("#<struct ") - 1, port); |
4bfdf158 | 611 | scm_intprint (SCM_STRUCT_VTABLE (exp), 16, port); |
b7f3516f | 612 | scm_putc (':', port); |
916d65b1 | 613 | scm_intprint (exp, 16, port); |
b7f3516f | 614 | scm_putc ('>', port); |
bafcafb2 | 615 | } |
bafcafb2 | 616 | } |
1cc91f1b | 617 | |
0f2d19dd JB |
618 | void |
619 | scm_init_struct () | |
0f2d19dd | 620 | { |
4bfdf158 | 621 | required_vtable_fields = SCM_CAR (scm_intern_obarray ("pruosrpw", sizeof ("pruosrpw") - 1, SCM_BOOL_F)); |
0f2d19dd | 622 | scm_permanent_object (required_vtable_fields); |
4bfdf158 MD |
623 | scm_sysintern ("vtable-index-layout", SCM_MAKINUM (scm_vtable_index_layout)); |
624 | scm_sysintern ("vtable-index-vtable", SCM_MAKINUM (scm_vtable_index_vtable)); | |
625 | scm_sysintern ("vtable-index-printer", SCM_MAKINUM (scm_vtable_index_printer)); | |
626 | scm_sysintern ("vtable-offset-user", SCM_MAKINUM (scm_vtable_offset_user)); | |
0f2d19dd JB |
627 | #include "struct.x" |
628 | } |