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0f2d19dd JB |
1 | /* Copyright (C) 1996 Free Software Foundation, Inc. |
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 | ||
43 | #include <stdio.h> | |
44 | #include "_scm.h" | |
20e6290e JB |
45 | #include "chars.h" |
46 | ||
47 | #include "struct.h" | |
0f2d19dd | 48 | |
95b88819 GH |
49 | #ifdef HAVE_STRING_H |
50 | #include <string.h> | |
51 | #endif | |
52 | ||
0f2d19dd JB |
53 | \f |
54 | ||
55 | static SCM required_vtable_fields = SCM_BOOL_F; | |
56 | static int struct_num = 0; | |
57 | ||
58 | \f | |
59 | SCM_PROC (s_struct_make_layout, "make-struct-layout", 1, 0, 0, scm_make_struct_layout); | |
1cc91f1b | 60 | |
0f2d19dd JB |
61 | SCM |
62 | scm_make_struct_layout (fields) | |
63 | SCM fields; | |
0f2d19dd JB |
64 | { |
65 | SCM new_sym; | |
66 | SCM_ASSERT (SCM_NIMP (fields) && SCM_ROSTRINGP (fields), | |
67 | fields, SCM_ARG1, s_struct_make_layout); | |
68 | ||
69 | { | |
70 | char * field_desc; | |
71 | int len; | |
72 | int x; | |
73 | ||
74 | len = SCM_ROLENGTH (fields); | |
75 | field_desc = SCM_ROCHARS (fields); | |
76 | SCM_ASSERT (!(len & 1), fields, "odd length field specification", s_struct_make_layout); | |
77 | ||
78 | for (x = 0; x < len; x += 2) | |
79 | { | |
80 | switch (field_desc[x]) | |
81 | { | |
82 | case 'u': | |
83 | case 'p': | |
84 | #if 0 | |
85 | case 'i': | |
86 | case 'd': | |
87 | #endif | |
88 | case 's': | |
89 | break; | |
90 | default: | |
91 | SCM_ASSERT (0, SCM_MAKICHR (field_desc[x]) , "unrecognized field type", s_struct_make_layout); | |
92 | } | |
93 | ||
94 | switch (field_desc[x + 1]) | |
95 | { | |
96 | case 'w': | |
2c36c351 | 97 | SCM_ASSERT (field_desc[x] != 's', SCM_MAKICHR (field_desc[x + 1]), |
0f2d19dd JB |
98 | "self fields not writable", s_struct_make_layout); |
99 | ||
100 | case 'r': | |
101 | case 'o': | |
102 | break; | |
2c36c351 MD |
103 | case 'R': |
104 | case 'W': | |
105 | case 'O': | |
106 | SCM_ASSERT (field_desc[x] != 's', SCM_MAKICHR (field_desc[x + 1]), | |
107 | "self fields not allowed in tail array", | |
108 | s_struct_make_layout); | |
109 | SCM_ASSERT (x == len - 2, SCM_MAKICHR (field_desc[x + 1]), | |
110 | "tail array field must be last field in layout", | |
111 | s_struct_make_layout); | |
112 | break; | |
0f2d19dd JB |
113 | default: |
114 | SCM_ASSERT (0, SCM_MAKICHR (field_desc[x]) , "unrecognized ref specification", s_struct_make_layout); | |
115 | } | |
116 | #if 0 | |
117 | if (field_desc[x] == 'd') | |
118 | { | |
119 | SCM_ASSERT (field_desc[x + 2] == '-', SCM_MAKINUM (x / 2), "missing dash field", s_struct_make_layout); | |
120 | x += 2; | |
121 | goto recheck_ref; | |
122 | } | |
123 | #endif | |
124 | } | |
125 | new_sym = SCM_CAR (scm_intern_obarray (field_desc, len, SCM_BOOL_F)); | |
126 | } | |
127 | return scm_return_first (new_sym, fields); | |
128 | } | |
129 | ||
130 | \f | |
131 | ||
132 | ||
1cc91f1b JB |
133 | |
134 | static void init_struct SCM_P ((SCM handle, int tail_elts, SCM inits)); | |
135 | ||
0f2d19dd JB |
136 | static void |
137 | init_struct (handle, tail_elts, inits) | |
138 | SCM handle; | |
2c36c351 | 139 | int tail_elts; |
0f2d19dd | 140 | SCM inits; |
0f2d19dd JB |
141 | { |
142 | SCM layout; | |
143 | SCM * data; | |
144 | unsigned char * fields_desc; | |
35de7ebe | 145 | unsigned char prot = 0; |
0f2d19dd JB |
146 | int n_fields; |
147 | SCM * mem; | |
2c36c351 MD |
148 | int tailp = 0; |
149 | ||
0f2d19dd JB |
150 | layout = SCM_STRUCT_LAYOUT (handle); |
151 | data = SCM_STRUCT_DATA (handle); | |
2c36c351 | 152 | fields_desc = (unsigned char *) SCM_CHARS (layout) - 2; |
0f2d19dd JB |
153 | n_fields = SCM_LENGTH (layout) / 2; |
154 | mem = SCM_STRUCT_DATA (handle); | |
155 | while (n_fields) | |
156 | { | |
2c36c351 MD |
157 | if (!tailp) |
158 | { | |
159 | fields_desc += 2; | |
160 | prot = fields_desc[1]; | |
161 | if (SCM_LAYOUT_TAILP (prot)) | |
162 | { | |
163 | tailp = 1; | |
164 | prot = prot == 'R' ? 'r' : prot == 'W' ? 'w' : 'o'; | |
165 | *mem++ = tail_elts; | |
166 | n_fields += tail_elts - 1; | |
167 | if (n_fields == 0) | |
168 | break; | |
169 | } | |
170 | } | |
171 | ||
0f2d19dd JB |
172 | switch (*fields_desc) |
173 | { | |
174 | #if 0 | |
175 | case 'i': | |
2c36c351 | 176 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
0f2d19dd JB |
177 | *mem = 0; |
178 | else | |
179 | { | |
180 | *mem = scm_num2long (SCM_CAR (inits), SCM_ARGn, "init_struct"); | |
181 | inits = SCM_CDR (inits); | |
182 | } | |
183 | break; | |
184 | #endif | |
185 | ||
186 | case 'u': | |
2c36c351 | 187 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
0f2d19dd JB |
188 | *mem = 0; |
189 | else | |
190 | { | |
191 | *mem = scm_num2ulong (SCM_CAR (inits), SCM_ARGn, "init_struct"); | |
192 | inits = SCM_CDR (inits); | |
193 | } | |
194 | break; | |
195 | ||
196 | case 'p': | |
2c36c351 | 197 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
0f2d19dd JB |
198 | *mem = SCM_EOL; |
199 | else | |
200 | { | |
201 | *mem = SCM_CAR (inits); | |
202 | inits = SCM_CDR (inits); | |
203 | } | |
204 | ||
205 | break; | |
206 | ||
207 | #if 0 | |
208 | case 'd': | |
2c36c351 | 209 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
0f2d19dd JB |
210 | *((double *)mem) = 0.0; |
211 | else | |
212 | { | |
213 | *mem = scm_num2dbl (SCM_CAR (inits), "init_struct"); | |
214 | inits = SCM_CDR (inits); | |
215 | } | |
216 | fields_desc += 2; | |
217 | break; | |
218 | #endif | |
219 | ||
220 | case 's': | |
221 | *mem = handle; | |
222 | break; | |
223 | } | |
224 | ||
0f2d19dd JB |
225 | n_fields--; |
226 | mem++; | |
227 | } | |
228 | } | |
229 | ||
230 | ||
231 | SCM_PROC (s_struct_p, "struct?", 1, 0, 0, scm_struct_p); | |
1cc91f1b | 232 | |
0f2d19dd JB |
233 | SCM |
234 | scm_struct_p (x) | |
235 | SCM x; | |
0f2d19dd JB |
236 | { |
237 | return ((SCM_NIMP (x) && SCM_STRUCTP (x)) | |
238 | ? SCM_BOOL_T | |
239 | : SCM_BOOL_F); | |
240 | } | |
241 | ||
242 | SCM_PROC (s_struct_vtable_p, "struct-vtable?", 1, 0, 0, scm_struct_vtable_p); | |
1cc91f1b | 243 | |
0f2d19dd JB |
244 | SCM |
245 | scm_struct_vtable_p (x) | |
246 | SCM x; | |
0f2d19dd JB |
247 | { |
248 | SCM layout; | |
249 | SCM * mem; | |
250 | ||
251 | if (SCM_IMP (x)) | |
252 | return SCM_BOOL_F; | |
253 | ||
254 | if (!SCM_STRUCTP (x)) | |
255 | return SCM_BOOL_F; | |
256 | ||
257 | layout = SCM_STRUCT_LAYOUT (x); | |
258 | ||
259 | if (SCM_LENGTH (layout) < SCM_LENGTH (required_vtable_fields)) | |
260 | return SCM_BOOL_F; | |
261 | ||
262 | if (strncmp (SCM_CHARS (layout), SCM_CHARS (required_vtable_fields), | |
263 | SCM_LENGTH (required_vtable_fields))) | |
264 | return SCM_BOOL_F; | |
265 | ||
266 | mem = SCM_STRUCT_DATA (x); | |
267 | ||
268 | if (mem[1] != 0) | |
269 | return SCM_BOOL_F; | |
270 | ||
271 | if (SCM_IMP (mem[0])) | |
272 | return SCM_BOOL_F; | |
273 | ||
274 | return (SCM_SYMBOLP (mem[0]) | |
275 | ? SCM_BOOL_T | |
276 | : SCM_BOOL_F); | |
277 | } | |
278 | ||
14d1400f JB |
279 | |
280 | /* All struct data must be allocated at an address whose bottom three | |
281 | bits are zero. This is because the tag for a struct lives in the | |
282 | bottom three bits of the struct's car, and the upper bits point to | |
283 | the data of its vtable, which is a struct itself. Thus, if the | |
284 | address of that data doesn't end in three zeros, tagging it will | |
285 | destroy the pointer. | |
286 | ||
287 | This function allocates a block of memory, and returns a pointer at | |
288 | least scm_struct_n_extra_words words into the block. Furthermore, | |
289 | it guarantees that that pointer's least three significant bits are | |
290 | all zero. | |
291 | ||
292 | The argument n_words should be the number of words that should | |
293 | appear after the returned address. (That is, it shouldn't include | |
294 | scm_struct_n_extra_words.) | |
295 | ||
296 | This function initializes the following fields of the struct: | |
297 | ||
298 | scm_struct_i_ptr --- the actual stort of the block of memory; the | |
299 | address you should pass to 'free' to dispose of the block. | |
300 | This field allows us to both guarantee that the returned | |
301 | address is divisible by eight, and allow the GC to free the | |
302 | block. | |
303 | ||
304 | scm_struct_i_n_words --- the number of words allocated to the | |
305 | block, including the extra fields. This is used by the GC. | |
306 | ||
307 | scm_struct_i_tag --- a unique tag assigned to this struct, | |
308 | allocated according to struct_num. | |
309 | ||
310 | Ugh. */ | |
311 | ||
312 | ||
313 | static SCM *alloc_struct SCM_P ((int n_words, char *who)); | |
314 | ||
315 | static SCM * | |
316 | alloc_struct (n_words, who) | |
317 | int n_words; | |
318 | char *who; | |
319 | { | |
320 | int size = sizeof (SCM) * (n_words + scm_struct_n_extra_words) + 7; | |
321 | SCM *block = (SCM *) scm_must_malloc (size, who); | |
322 | ||
323 | /* Adjust the pointer to hide the extra words. */ | |
324 | SCM *p = block + scm_struct_n_extra_words; | |
325 | ||
326 | /* Adjust it even further so it's aligned on an eight-byte boundary. */ | |
327 | p = (SCM *) (((SCM) p + 7) & ~7); | |
328 | ||
329 | /* Initialize a few fields as described above. */ | |
330 | p[scm_struct_i_ptr] = (SCM) block; | |
331 | p[scm_struct_i_n_words] = (SCM) (scm_struct_n_extra_words + n_words); | |
332 | p[scm_struct_i_tag] = struct_num++; | |
333 | ||
334 | return p; | |
335 | } | |
336 | ||
337 | ||
0f2d19dd | 338 | SCM_PROC (s_make_struct, "make-struct", 2, 0, 1, scm_make_struct); |
1cc91f1b | 339 | |
0f2d19dd JB |
340 | SCM |
341 | scm_make_struct (vtable, tail_array_size, init) | |
342 | SCM vtable; | |
343 | SCM tail_array_size; | |
344 | SCM init; | |
0f2d19dd JB |
345 | { |
346 | SCM layout; | |
347 | int basic_size; | |
348 | int tail_elts; | |
349 | SCM * data; | |
350 | SCM handle; | |
351 | ||
352 | SCM_ASSERT ((SCM_BOOL_F != scm_struct_vtable_p (vtable)), | |
353 | vtable, SCM_ARG1, s_make_struct); | |
14d1400f JB |
354 | SCM_ASSERT (SCM_INUMP (tail_array_size), tail_array_size, SCM_ARG2, |
355 | s_make_struct); | |
0f2d19dd JB |
356 | |
357 | layout = SCM_STRUCT_DATA (vtable)[scm_struct_i_layout]; | |
358 | basic_size = SCM_LENGTH (layout) / 2; | |
359 | tail_elts = SCM_INUM (tail_array_size); | |
360 | SCM_NEWCELL (handle); | |
361 | SCM_DEFER_INTS; | |
14d1400f | 362 | data = alloc_struct (basic_size + tail_elts, "make-struct"); |
0f2d19dd | 363 | SCM_SETCDR (handle, data); |
35457f1e | 364 | SCM_SETCAR (handle, ((SCM)SCM_STRUCT_DATA (vtable)) + scm_tc3_cons_gloc); |
0f2d19dd JB |
365 | init_struct (handle, tail_elts, init); |
366 | SCM_ALLOW_INTS; | |
367 | return handle; | |
368 | } | |
369 | ||
370 | ||
371 | ||
372 | SCM_PROC (s_make_vtable_vtable, "make-vtable-vtable", 2, 0, 1, scm_make_vtable_vtable); | |
1cc91f1b | 373 | |
0f2d19dd JB |
374 | SCM |
375 | scm_make_vtable_vtable (extra_fields, tail_array_size, init) | |
376 | SCM extra_fields; | |
377 | SCM tail_array_size; | |
378 | SCM init; | |
0f2d19dd JB |
379 | { |
380 | SCM fields; | |
381 | SCM layout; | |
382 | int basic_size; | |
383 | int tail_elts; | |
384 | SCM * data; | |
385 | SCM handle; | |
386 | ||
387 | SCM_ASSERT (SCM_NIMP (extra_fields) && SCM_ROSTRINGP (extra_fields), | |
388 | extra_fields, SCM_ARG1, s_make_vtable_vtable); | |
14d1400f JB |
389 | SCM_ASSERT (SCM_INUMP (tail_array_size), tail_array_size, SCM_ARG2, |
390 | s_make_vtable_vtable); | |
0f2d19dd JB |
391 | |
392 | fields = scm_string_append (scm_listify (required_vtable_fields, | |
393 | extra_fields, | |
394 | SCM_UNDEFINED)); | |
395 | layout = scm_make_struct_layout (fields); | |
396 | basic_size = SCM_LENGTH (layout) / 2; | |
397 | tail_elts = SCM_INUM (tail_array_size); | |
398 | SCM_NEWCELL (handle); | |
399 | SCM_DEFER_INTS; | |
14d1400f | 400 | data = alloc_struct (basic_size + tail_elts, "make-vtable-vtable"); |
0f2d19dd | 401 | SCM_SETCDR (handle, data); |
35457f1e | 402 | SCM_SETCAR (handle, ((SCM)data) + scm_tc3_cons_gloc); |
0f2d19dd JB |
403 | SCM_STRUCT_LAYOUT (handle) = layout; |
404 | init_struct (handle, tail_elts, scm_cons (layout, init)); | |
405 | SCM_ALLOW_INTS; | |
406 | return handle; | |
407 | } | |
408 | ||
409 | \f | |
410 | ||
411 | ||
412 | SCM_PROC (s_struct_ref, "struct-ref", 2, 0, 0, scm_struct_ref); | |
1cc91f1b | 413 | |
0f2d19dd JB |
414 | SCM |
415 | scm_struct_ref (handle, pos) | |
416 | SCM handle; | |
417 | SCM pos; | |
0f2d19dd | 418 | { |
5e840c2e | 419 | SCM answer = SCM_UNDEFINED; |
0f2d19dd JB |
420 | SCM * data; |
421 | SCM layout; | |
422 | int p; | |
423 | int n_fields; | |
424 | unsigned char * fields_desc; | |
425 | unsigned char field_type; | |
426 | ||
427 | ||
428 | SCM_ASSERT (SCM_NIMP (handle) && SCM_STRUCTP (handle), handle, | |
429 | SCM_ARG1, s_struct_ref); | |
430 | SCM_ASSERT (SCM_INUMP (pos), pos, SCM_ARG2, s_struct_ref); | |
431 | ||
432 | layout = SCM_STRUCT_LAYOUT (handle); | |
433 | data = SCM_STRUCT_DATA (handle); | |
434 | p = SCM_INUM (pos); | |
435 | ||
436 | fields_desc = (unsigned char *)SCM_CHARS (layout); | |
2c36c351 MD |
437 | n_fields = data[- scm_struct_n_extra_words] - scm_struct_n_extra_words; |
438 | ||
439 | SCM_ASSERT (p < n_fields, pos, SCM_OUTOFRANGE, s_struct_ref); | |
0f2d19dd | 440 | |
2c36c351 MD |
441 | if (p * 2 < SCM_LENGTH (layout)) |
442 | { | |
443 | unsigned char ref; | |
444 | field_type = fields_desc[p * 2]; | |
445 | ref = fields_desc[p * 2 + 1]; | |
446 | if ((ref != 'r') && (ref != 'w')) | |
447 | { | |
448 | if ((ref == 'R') || (ref == 'W')) | |
449 | field_type = 'u'; | |
450 | else | |
451 | SCM_ASSERT (0, pos, "ref denied", s_struct_ref); | |
452 | } | |
453 | } | |
454 | else if (fields_desc[SCM_LENGTH (layout) - 1] != 'O') | |
455 | field_type = fields_desc[SCM_LENGTH (layout) - 2]; | |
456 | else | |
457 | { | |
458 | SCM_ASSERT (0, pos, "ref denied", s_struct_ref); | |
35de7ebe | 459 | abort (); |
2c36c351 MD |
460 | } |
461 | ||
0f2d19dd JB |
462 | switch (field_type) |
463 | { | |
464 | case 'u': | |
465 | answer = scm_ulong2num (data[p]); | |
466 | break; | |
467 | ||
468 | #if 0 | |
469 | case 'i': | |
470 | answer = scm_long2num (data[p]); | |
471 | break; | |
472 | ||
473 | case 'd': | |
474 | answer = scm_makdbl (*((double *)&(data[p])), 0.0); | |
475 | break; | |
476 | #endif | |
477 | ||
478 | case 's': | |
479 | case 'p': | |
480 | answer = data[p]; | |
481 | break; | |
482 | ||
483 | ||
484 | default: | |
485 | SCM_ASSERT (0, SCM_MAKICHR (field_type), "unrecognized field type", s_struct_ref); | |
486 | break; | |
487 | } | |
488 | ||
489 | return answer; | |
490 | } | |
491 | ||
492 | ||
493 | SCM_PROC (s_struct_set_x, "struct-set!", 3, 0, 0, scm_struct_set_x); | |
1cc91f1b | 494 | |
0f2d19dd JB |
495 | SCM |
496 | scm_struct_set_x (handle, pos, val) | |
497 | SCM handle; | |
498 | SCM pos; | |
499 | SCM val; | |
0f2d19dd JB |
500 | { |
501 | SCM * data; | |
502 | SCM layout; | |
503 | int p; | |
504 | int n_fields; | |
505 | unsigned char * fields_desc; | |
506 | unsigned char field_type; | |
507 | ||
508 | ||
509 | ||
510 | SCM_ASSERT (SCM_NIMP (handle) && SCM_STRUCTP (handle), handle, | |
511 | SCM_ARG1, s_struct_ref); | |
512 | SCM_ASSERT (SCM_INUMP (pos), pos, SCM_ARG2, s_struct_ref); | |
513 | ||
514 | layout = SCM_STRUCT_LAYOUT (handle); | |
515 | data = SCM_STRUCT_DATA (handle); | |
516 | p = SCM_INUM (pos); | |
517 | ||
518 | fields_desc = (unsigned char *)SCM_CHARS (layout); | |
2c36c351 | 519 | n_fields = data[- scm_struct_n_extra_words] - scm_struct_n_extra_words; |
0f2d19dd | 520 | |
2c36c351 | 521 | SCM_ASSERT (p < n_fields, pos, SCM_OUTOFRANGE, s_struct_set_x); |
0f2d19dd | 522 | |
2c36c351 MD |
523 | if (p * 2 < SCM_LENGTH (layout)) |
524 | { | |
525 | unsigned char set_x; | |
526 | field_type = fields_desc[p * 2]; | |
527 | set_x = fields_desc [p * 2 + 1]; | |
528 | if (set_x != 'w') | |
529 | SCM_ASSERT (0, pos, "set_x denied", s_struct_set_x); | |
530 | } | |
531 | else if (fields_desc[SCM_LENGTH (layout) - 1] == 'W') | |
532 | field_type = fields_desc[SCM_LENGTH (layout) - 2]; | |
533 | else | |
534 | { | |
535 | SCM_ASSERT (0, pos, "set_x denied", s_struct_ref); | |
35de7ebe | 536 | abort (); |
2c36c351 MD |
537 | } |
538 | ||
0f2d19dd JB |
539 | switch (field_type) |
540 | { | |
541 | case 'u': | |
542 | data[p] = (SCM)scm_num2ulong (val, (char *)SCM_ARG3, s_struct_set_x); | |
543 | break; | |
544 | ||
545 | #if 0 | |
546 | case 'i': | |
547 | data[p] = scm_num2long (val, (char *)SCM_ARG3, s_struct_set_x); | |
548 | break; | |
549 | ||
550 | case 'd': | |
551 | *((double *)&(data[p])) = scm_num2dbl (val, (char *)SCM_ARG3); | |
552 | break; | |
553 | #endif | |
554 | ||
555 | case 'p': | |
556 | data[p] = val; | |
557 | break; | |
558 | ||
559 | case 's': | |
560 | SCM_ASSERT (0, SCM_MAKICHR (field_type), "self fields immutable", s_struct_set_x); | |
561 | break; | |
562 | ||
563 | default: | |
564 | SCM_ASSERT (0, SCM_MAKICHR (field_type), "unrecognized field type", s_struct_set_x); | |
565 | break; | |
566 | } | |
567 | ||
568 | return val; | |
569 | } | |
570 | ||
571 | ||
572 | SCM_PROC (s_struct_vtable, "struct-vtable", 1, 0, 0, scm_struct_vtable); | |
1cc91f1b | 573 | |
0f2d19dd JB |
574 | SCM |
575 | scm_struct_vtable (handle) | |
576 | SCM handle; | |
0f2d19dd JB |
577 | { |
578 | SCM_ASSERT (SCM_NIMP (handle) && SCM_STRUCTP (handle), handle, | |
579 | SCM_ARG1, s_struct_vtable); | |
580 | return SCM_STRUCT_VTABLE (handle); | |
581 | } | |
582 | ||
583 | ||
584 | SCM_PROC (s_struct_vtable_tag, "struct-vtable-tag", 1, 0, 0, scm_struct_vtable_tag); | |
1cc91f1b | 585 | |
0f2d19dd JB |
586 | SCM |
587 | scm_struct_vtable_tag (handle) | |
588 | SCM handle; | |
0f2d19dd JB |
589 | { |
590 | SCM_ASSERT (SCM_NIMP (handle) && (SCM_BOOL_F != scm_struct_vtable_p (handle)), | |
591 | handle, SCM_ARG1, s_struct_vtable_tag); | |
592 | return scm_long2num (SCM_STRUCT_DATA (handle)[-1]); | |
593 | } | |
594 | ||
595 | ||
596 | \f | |
597 | ||
1cc91f1b | 598 | |
0f2d19dd JB |
599 | void |
600 | scm_init_struct () | |
0f2d19dd JB |
601 | { |
602 | required_vtable_fields = SCM_CAR (scm_intern_obarray ("pruosr", sizeof ("pruosr") - 1, SCM_BOOL_F)); | |
603 | scm_permanent_object (required_vtable_fields); | |
604 | scm_sysintern ("struct-vtable-offset", SCM_MAKINUM (scm_struct_i_vtable_offset)); | |
605 | #include "struct.x" | |
606 | } | |
607 |