Commit | Line | Data |
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78a0461a | 1 | /* Copyright (C) 1996, 1997, 1998, 1999 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. */ |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
0f2d19dd JB |
45 | \f |
46 | ||
47 | #include <stdio.h> | |
48 | #include "_scm.h" | |
20e6290e | 49 | #include "chars.h" |
bafcafb2 | 50 | #include "genio.h" |
916d65b1 | 51 | #include "eval.h" |
98d5f601 MD |
52 | #include "alist.h" |
53 | #include "weaks.h" | |
54 | #include "hashtab.h" | |
20e6290e | 55 | |
1bbd0b84 | 56 | #include "scm_validate.h" |
20e6290e | 57 | #include "struct.h" |
0f2d19dd | 58 | |
95b88819 GH |
59 | #ifdef HAVE_STRING_H |
60 | #include <string.h> | |
61 | #endif | |
62 | ||
0f2d19dd JB |
63 | \f |
64 | ||
65 | static SCM required_vtable_fields = SCM_BOOL_F; | |
98d5f601 | 66 | SCM scm_struct_table; |
0f2d19dd JB |
67 | |
68 | \f | |
1bbd0b84 GB |
69 | GUILE_PROC (scm_make_struct_layout, "make-struct-layout", 1, 0, 0, |
70 | (SCM fields), | |
71 | "") | |
72 | #define FUNC_NAME s_scm_make_struct_layout | |
0f2d19dd JB |
73 | { |
74 | SCM new_sym; | |
1bbd0b84 GB |
75 | SCM_VALIDATE_ROSTRING(1,fields); |
76 | { /* scope */ | |
0f2d19dd JB |
77 | char * field_desc; |
78 | int len; | |
79 | int x; | |
80 | ||
81 | len = SCM_ROLENGTH (fields); | |
82 | field_desc = SCM_ROCHARS (fields); | |
1bbd0b84 | 83 | SCM_ASSERT (!(len & 1), fields, "odd length field specification", FUNC_NAME); |
0f2d19dd JB |
84 | |
85 | for (x = 0; x < len; x += 2) | |
86 | { | |
87 | switch (field_desc[x]) | |
88 | { | |
89 | case 'u': | |
90 | case 'p': | |
91 | #if 0 | |
92 | case 'i': | |
93 | case 'd': | |
94 | #endif | |
95 | case 's': | |
96 | break; | |
97 | default: | |
1bbd0b84 | 98 | SCM_ASSERT (0, SCM_MAKICHR (field_desc[x]) , "unrecognized field type", FUNC_NAME); |
0f2d19dd JB |
99 | } |
100 | ||
101 | switch (field_desc[x + 1]) | |
102 | { | |
103 | case 'w': | |
2c36c351 | 104 | SCM_ASSERT (field_desc[x] != 's', SCM_MAKICHR (field_desc[x + 1]), |
1bbd0b84 | 105 | "self fields not writable", FUNC_NAME); |
0f2d19dd JB |
106 | |
107 | case 'r': | |
108 | case 'o': | |
109 | break; | |
2c36c351 MD |
110 | case 'R': |
111 | case 'W': | |
112 | case 'O': | |
113 | SCM_ASSERT (field_desc[x] != 's', SCM_MAKICHR (field_desc[x + 1]), | |
114 | "self fields not allowed in tail array", | |
1bbd0b84 | 115 | FUNC_NAME); |
2c36c351 MD |
116 | SCM_ASSERT (x == len - 2, SCM_MAKICHR (field_desc[x + 1]), |
117 | "tail array field must be last field in layout", | |
1bbd0b84 | 118 | FUNC_NAME); |
2c36c351 | 119 | break; |
0f2d19dd | 120 | default: |
1bbd0b84 | 121 | SCM_ASSERT (0, SCM_MAKICHR (field_desc[x]) , "unrecognized ref specification", FUNC_NAME); |
0f2d19dd JB |
122 | } |
123 | #if 0 | |
124 | if (field_desc[x] == 'd') | |
125 | { | |
1bbd0b84 | 126 | SCM_ASSERT (field_desc[x + 2] == '-', SCM_MAKINUM (x / 2), "missing dash field", FUNC_NAME); |
0f2d19dd JB |
127 | x += 2; |
128 | goto recheck_ref; | |
129 | } | |
130 | #endif | |
131 | } | |
132 | new_sym = SCM_CAR (scm_intern_obarray (field_desc, len, SCM_BOOL_F)); | |
133 | } | |
134 | return scm_return_first (new_sym, fields); | |
135 | } | |
1bbd0b84 | 136 | #undef FUNC_NAME |
0f2d19dd JB |
137 | |
138 | \f | |
139 | ||
140 | ||
1cc91f1b | 141 | |
a5bfe84d | 142 | void |
1bbd0b84 | 143 | scm_struct_init (SCM handle, int tail_elts, SCM inits) |
0f2d19dd JB |
144 | { |
145 | SCM layout; | |
146 | SCM * data; | |
147 | unsigned char * fields_desc; | |
35de7ebe | 148 | unsigned char prot = 0; |
0f2d19dd JB |
149 | int n_fields; |
150 | SCM * mem; | |
2c36c351 MD |
151 | int tailp = 0; |
152 | ||
0f2d19dd JB |
153 | layout = SCM_STRUCT_LAYOUT (handle); |
154 | data = SCM_STRUCT_DATA (handle); | |
2c36c351 | 155 | fields_desc = (unsigned char *) SCM_CHARS (layout) - 2; |
0f2d19dd JB |
156 | n_fields = SCM_LENGTH (layout) / 2; |
157 | mem = SCM_STRUCT_DATA (handle); | |
158 | while (n_fields) | |
159 | { | |
2c36c351 MD |
160 | if (!tailp) |
161 | { | |
162 | fields_desc += 2; | |
163 | prot = fields_desc[1]; | |
164 | if (SCM_LAYOUT_TAILP (prot)) | |
165 | { | |
166 | tailp = 1; | |
167 | prot = prot == 'R' ? 'r' : prot == 'W' ? 'w' : 'o'; | |
168 | *mem++ = tail_elts; | |
169 | n_fields += tail_elts - 1; | |
170 | if (n_fields == 0) | |
171 | break; | |
172 | } | |
173 | } | |
174 | ||
0f2d19dd JB |
175 | switch (*fields_desc) |
176 | { | |
177 | #if 0 | |
178 | case 'i': | |
2c36c351 | 179 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
0f2d19dd JB |
180 | *mem = 0; |
181 | else | |
182 | { | |
a5bfe84d | 183 | *mem = scm_num2long (SCM_CAR (inits), SCM_ARGn, "scm_struct_init"); |
0f2d19dd JB |
184 | inits = SCM_CDR (inits); |
185 | } | |
186 | break; | |
187 | #endif | |
188 | ||
189 | case 'u': | |
2c36c351 | 190 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
0f2d19dd JB |
191 | *mem = 0; |
192 | else | |
193 | { | |
a5bfe84d | 194 | *mem = scm_num2ulong (SCM_CAR (inits), SCM_ARGn, "scm_struct_init"); |
0f2d19dd JB |
195 | inits = SCM_CDR (inits); |
196 | } | |
197 | break; | |
198 | ||
199 | case 'p': | |
2c36c351 | 200 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
916d65b1 | 201 | *mem = SCM_BOOL_F; |
0f2d19dd JB |
202 | else |
203 | { | |
204 | *mem = SCM_CAR (inits); | |
205 | inits = SCM_CDR (inits); | |
206 | } | |
207 | ||
208 | break; | |
209 | ||
210 | #if 0 | |
211 | case 'd': | |
2c36c351 | 212 | if ((prot != 'r' && prot != 'w') || inits == SCM_EOL) |
0f2d19dd JB |
213 | *((double *)mem) = 0.0; |
214 | else | |
215 | { | |
a5bfe84d | 216 | *mem = scm_num2dbl (SCM_CAR (inits), "scm_struct_init"); |
0f2d19dd JB |
217 | inits = SCM_CDR (inits); |
218 | } | |
219 | fields_desc += 2; | |
220 | break; | |
221 | #endif | |
222 | ||
223 | case 's': | |
224 | *mem = handle; | |
225 | break; | |
226 | } | |
227 | ||
0f2d19dd JB |
228 | n_fields--; |
229 | mem++; | |
230 | } | |
231 | } | |
232 | ||
233 | ||
1bbd0b84 GB |
234 | GUILE_PROC (scm_struct_p, "struct?", 1, 0, 0, |
235 | (SCM x), | |
236 | "") | |
237 | #define FUNC_NAME s_scm_struct_p | |
0f2d19dd | 238 | { |
1bbd0b84 | 239 | return SCM_BOOL(SCM_NIMP (x) && SCM_STRUCTP (x)); |
0f2d19dd | 240 | } |
1bbd0b84 | 241 | #undef FUNC_NAME |
0f2d19dd | 242 | |
1bbd0b84 GB |
243 | GUILE_PROC (scm_struct_vtable_p, "struct-vtable?", 1, 0, 0, |
244 | (SCM x), | |
245 | "") | |
246 | #define FUNC_NAME s_scm_struct_vtable_p | |
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 | ||
1bbd0b84 | 274 | return SCM_BOOL(SCM_SYMBOLP (mem[0])); |
0f2d19dd | 275 | } |
1bbd0b84 | 276 | #undef FUNC_NAME |
0f2d19dd | 277 | |
14d1400f JB |
278 | |
279 | /* All struct data must be allocated at an address whose bottom three | |
280 | bits are zero. This is because the tag for a struct lives in the | |
281 | bottom three bits of the struct's car, and the upper bits point to | |
282 | the data of its vtable, which is a struct itself. Thus, if the | |
283 | address of that data doesn't end in three zeros, tagging it will | |
284 | destroy the pointer. | |
285 | ||
286 | This function allocates a block of memory, and returns a pointer at | |
287 | least scm_struct_n_extra_words words into the block. Furthermore, | |
288 | it guarantees that that pointer's least three significant bits are | |
289 | all zero. | |
290 | ||
291 | The argument n_words should be the number of words that should | |
292 | appear after the returned address. (That is, it shouldn't include | |
293 | scm_struct_n_extra_words.) | |
294 | ||
295 | This function initializes the following fields of the struct: | |
296 | ||
ad196599 | 297 | scm_struct_i_ptr --- the actual start of the block of memory; the |
14d1400f JB |
298 | address you should pass to 'free' to dispose of the block. |
299 | This field allows us to both guarantee that the returned | |
300 | address is divisible by eight, and allow the GC to free the | |
301 | block. | |
302 | ||
303 | scm_struct_i_n_words --- the number of words allocated to the | |
304 | block, including the extra fields. This is used by the GC. | |
305 | ||
14d1400f JB |
306 | Ugh. */ |
307 | ||
308 | ||
a5bfe84d MD |
309 | SCM * |
310 | scm_alloc_struct (int n_words, int n_extra, char *who) | |
14d1400f | 311 | { |
a5bfe84d | 312 | int size = sizeof (SCM) * (n_words + n_extra) + 7; |
14d1400f JB |
313 | SCM *block = (SCM *) scm_must_malloc (size, who); |
314 | ||
315 | /* Adjust the pointer to hide the extra words. */ | |
a5bfe84d | 316 | SCM *p = block + n_extra; |
14d1400f JB |
317 | |
318 | /* Adjust it even further so it's aligned on an eight-byte boundary. */ | |
319 | p = (SCM *) (((SCM) p + 7) & ~7); | |
320 | ||
ad196599 MD |
321 | /* Initialize a few fields as described above. */ |
322 | p[scm_struct_i_free] = (SCM) scm_struct_free_standard; | |
14d1400f | 323 | p[scm_struct_i_ptr] = (SCM) block; |
ad196599 MD |
324 | p[scm_struct_i_n_words] = (SCM) n_words; |
325 | p[scm_struct_i_flags] = 0; | |
14d1400f JB |
326 | |
327 | return p; | |
328 | } | |
329 | ||
97056309 | 330 | scm_sizet |
ad196599 MD |
331 | scm_struct_free_0 (SCM *vtable, SCM *data) |
332 | { | |
333 | return 0; | |
334 | } | |
335 | ||
97056309 | 336 | scm_sizet |
ad196599 MD |
337 | scm_struct_free_light (SCM *vtable, SCM *data) |
338 | { | |
339 | free (data); | |
340 | return vtable[scm_struct_i_size] & ~SCM_STRUCTF_MASK; | |
341 | } | |
342 | ||
97056309 | 343 | scm_sizet |
ad196599 MD |
344 | scm_struct_free_standard (SCM *vtable, SCM *data) |
345 | { | |
346 | size_t n = ((data[scm_struct_i_n_words] + scm_struct_n_extra_words) | |
347 | * sizeof (SCM) + 7); | |
348 | free ((void *) data[scm_struct_i_ptr]); | |
349 | return n; | |
350 | } | |
351 | ||
97056309 | 352 | scm_sizet |
ad196599 MD |
353 | scm_struct_free_entity (SCM *vtable, SCM *data) |
354 | { | |
355 | size_t n = ((data[scm_struct_i_n_words] + scm_struct_entity_n_extra_words) | |
356 | * sizeof (SCM) + 7); | |
357 | free ((void *) data[scm_struct_i_ptr]); | |
358 | return n; | |
359 | } | |
14d1400f | 360 | |
1bbd0b84 GB |
361 | GUILE_PROC (scm_make_struct, "make-struct", 2, 0, 1, |
362 | (SCM vtable, SCM tail_array_size, SCM init), | |
363 | "") | |
364 | #define FUNC_NAME s_scm_make_struct | |
0f2d19dd JB |
365 | { |
366 | SCM layout; | |
367 | int basic_size; | |
368 | int tail_elts; | |
369 | SCM * data; | |
370 | SCM handle; | |
371 | ||
1bbd0b84 GB |
372 | SCM_VALIDATE_VTABLE(1,vtable); |
373 | SCM_VALIDATE_INT(2,tail_array_size); | |
0f2d19dd | 374 | |
4bfdf158 | 375 | layout = SCM_STRUCT_DATA (vtable)[scm_vtable_index_layout]; |
0f2d19dd JB |
376 | basic_size = SCM_LENGTH (layout) / 2; |
377 | tail_elts = SCM_INUM (tail_array_size); | |
378 | SCM_NEWCELL (handle); | |
379 | SCM_DEFER_INTS; | |
a5bfe84d MD |
380 | if (SCM_STRUCT_DATA (vtable)[scm_struct_i_flags] & SCM_STRUCTF_ENTITY) |
381 | { | |
382 | data = scm_alloc_struct (basic_size + tail_elts, | |
98d5f601 | 383 | scm_struct_entity_n_extra_words, |
a5bfe84d | 384 | "make-struct"); |
2c53acd5 | 385 | data[scm_struct_i_procedure] = SCM_BOOL_F; |
25c94826 | 386 | data[scm_struct_i_setter] = SCM_BOOL_F; |
a5bfe84d MD |
387 | } |
388 | else | |
389 | data = scm_alloc_struct (basic_size + tail_elts, | |
390 | scm_struct_n_extra_words, | |
391 | "make-struct"); | |
0f2d19dd | 392 | SCM_SETCDR (handle, data); |
35457f1e | 393 | SCM_SETCAR (handle, ((SCM)SCM_STRUCT_DATA (vtable)) + scm_tc3_cons_gloc); |
a5bfe84d | 394 | scm_struct_init (handle, tail_elts, init); |
0f2d19dd JB |
395 | SCM_ALLOW_INTS; |
396 | return handle; | |
397 | } | |
1bbd0b84 | 398 | #undef FUNC_NAME |
0f2d19dd JB |
399 | |
400 | ||
401 | ||
1bbd0b84 GB |
402 | GUILE_PROC (scm_make_vtable_vtable, "make-vtable-vtable", 2, 0, 1, |
403 | (SCM extra_fields, SCM tail_array_size, SCM init), | |
404 | "") | |
405 | #define FUNC_NAME s_scm_make_vtable_vtable | |
0f2d19dd JB |
406 | { |
407 | SCM fields; | |
408 | SCM layout; | |
409 | int basic_size; | |
410 | int tail_elts; | |
411 | SCM * data; | |
412 | SCM handle; | |
413 | ||
1bbd0b84 GB |
414 | SCM_VALIDATE_ROSTRING(1,extra_fields); |
415 | SCM_VALIDATE_INT(2,tail_array_size); | |
0f2d19dd JB |
416 | |
417 | fields = scm_string_append (scm_listify (required_vtable_fields, | |
418 | extra_fields, | |
419 | SCM_UNDEFINED)); | |
420 | layout = scm_make_struct_layout (fields); | |
421 | basic_size = SCM_LENGTH (layout) / 2; | |
422 | tail_elts = SCM_INUM (tail_array_size); | |
423 | SCM_NEWCELL (handle); | |
424 | SCM_DEFER_INTS; | |
a5bfe84d MD |
425 | data = scm_alloc_struct (basic_size + tail_elts, |
426 | scm_struct_n_extra_words, | |
427 | "make-vtable-vtable"); | |
0f2d19dd | 428 | SCM_SETCDR (handle, data); |
35457f1e | 429 | SCM_SETCAR (handle, ((SCM)data) + scm_tc3_cons_gloc); |
0f2d19dd | 430 | SCM_STRUCT_LAYOUT (handle) = layout; |
a5bfe84d | 431 | scm_struct_init (handle, tail_elts, scm_cons (layout, init)); |
0f2d19dd JB |
432 | SCM_ALLOW_INTS; |
433 | return handle; | |
434 | } | |
1bbd0b84 | 435 | #undef FUNC_NAME |
0f2d19dd JB |
436 | |
437 | \f | |
438 | ||
439 | ||
1bbd0b84 GB |
440 | GUILE_PROC (scm_struct_ref, "struct-ref", 2, 0, 0, |
441 | (SCM handle, SCM pos), | |
442 | "") | |
443 | #define FUNC_NAME s_scm_struct_ref | |
0f2d19dd | 444 | { |
5e840c2e | 445 | SCM answer = SCM_UNDEFINED; |
0f2d19dd JB |
446 | SCM * data; |
447 | SCM layout; | |
448 | int p; | |
449 | int n_fields; | |
450 | unsigned char * fields_desc; | |
f3667f52 | 451 | unsigned char field_type = 0; |
0f2d19dd JB |
452 | |
453 | ||
1bbd0b84 GB |
454 | SCM_VALIDATE_STRUCT(1,handle); |
455 | SCM_VALIDATE_INT(2,pos); | |
0f2d19dd JB |
456 | |
457 | layout = SCM_STRUCT_LAYOUT (handle); | |
458 | data = SCM_STRUCT_DATA (handle); | |
459 | p = SCM_INUM (pos); | |
460 | ||
ad196599 MD |
461 | fields_desc = (unsigned char *) SCM_CHARS (layout); |
462 | n_fields = data[scm_struct_i_n_words]; | |
2c36c351 | 463 | |
1bbd0b84 | 464 | SCM_ASSERT (p < n_fields, pos, SCM_OUTOFRANGE, FUNC_NAME); |
0f2d19dd | 465 | |
2c36c351 MD |
466 | if (p * 2 < SCM_LENGTH (layout)) |
467 | { | |
468 | unsigned char ref; | |
469 | field_type = fields_desc[p * 2]; | |
470 | ref = fields_desc[p * 2 + 1]; | |
471 | if ((ref != 'r') && (ref != 'w')) | |
472 | { | |
473 | if ((ref == 'R') || (ref == 'W')) | |
474 | field_type = 'u'; | |
475 | else | |
1bbd0b84 | 476 | SCM_ASSERT (0, pos, "ref denied", FUNC_NAME); |
2c36c351 MD |
477 | } |
478 | } | |
479 | else if (fields_desc[SCM_LENGTH (layout) - 1] != 'O') | |
480 | field_type = fields_desc[SCM_LENGTH (layout) - 2]; | |
481 | else | |
482 | { | |
1bbd0b84 | 483 | SCM_ASSERT (0, pos, "ref denied", FUNC_NAME); |
35de7ebe | 484 | abort (); |
2c36c351 MD |
485 | } |
486 | ||
0f2d19dd JB |
487 | switch (field_type) |
488 | { | |
489 | case 'u': | |
490 | answer = scm_ulong2num (data[p]); | |
491 | break; | |
492 | ||
493 | #if 0 | |
494 | case 'i': | |
495 | answer = scm_long2num (data[p]); | |
496 | break; | |
497 | ||
498 | case 'd': | |
499 | answer = scm_makdbl (*((double *)&(data[p])), 0.0); | |
500 | break; | |
501 | #endif | |
502 | ||
503 | case 's': | |
504 | case 'p': | |
505 | answer = data[p]; | |
506 | break; | |
507 | ||
508 | ||
509 | default: | |
1bbd0b84 | 510 | SCM_ASSERT (0, SCM_MAKICHR (field_type), "unrecognized field type", FUNC_NAME); |
0f2d19dd JB |
511 | break; |
512 | } | |
513 | ||
514 | return answer; | |
515 | } | |
1bbd0b84 | 516 | #undef FUNC_NAME |
0f2d19dd JB |
517 | |
518 | ||
1bbd0b84 GB |
519 | GUILE_PROC (scm_struct_set_x, "struct-set!", 3, 0, 0, |
520 | (SCM handle, SCM pos, SCM val), | |
521 | "") | |
522 | #define FUNC_NAME s_scm_struct_set_x | |
0f2d19dd JB |
523 | { |
524 | SCM * data; | |
525 | SCM layout; | |
526 | int p; | |
527 | int n_fields; | |
528 | unsigned char * fields_desc; | |
f3667f52 | 529 | unsigned char field_type = 0; |
0f2d19dd | 530 | |
1bbd0b84 GB |
531 | SCM_VALIDATE_STRUCT(1,handle); |
532 | SCM_VALIDATE_INT(2,pos); | |
0f2d19dd JB |
533 | |
534 | layout = SCM_STRUCT_LAYOUT (handle); | |
535 | data = SCM_STRUCT_DATA (handle); | |
536 | p = SCM_INUM (pos); | |
537 | ||
538 | fields_desc = (unsigned char *)SCM_CHARS (layout); | |
ad196599 | 539 | n_fields = data[scm_struct_i_n_words]; |
0f2d19dd | 540 | |
1bbd0b84 | 541 | SCM_ASSERT (p < n_fields, pos, SCM_OUTOFRANGE, FUNC_NAME); |
0f2d19dd | 542 | |
2c36c351 MD |
543 | if (p * 2 < SCM_LENGTH (layout)) |
544 | { | |
545 | unsigned char set_x; | |
546 | field_type = fields_desc[p * 2]; | |
547 | set_x = fields_desc [p * 2 + 1]; | |
548 | if (set_x != 'w') | |
1bbd0b84 | 549 | SCM_ASSERT (0, pos, "set_x denied", FUNC_NAME); |
2c36c351 MD |
550 | } |
551 | else if (fields_desc[SCM_LENGTH (layout) - 1] == 'W') | |
552 | field_type = fields_desc[SCM_LENGTH (layout) - 2]; | |
553 | else | |
554 | { | |
1bbd0b84 | 555 | SCM_ASSERT (0, pos, "set_x denied", FUNC_NAME); |
35de7ebe | 556 | abort (); |
2c36c351 MD |
557 | } |
558 | ||
0f2d19dd JB |
559 | switch (field_type) |
560 | { | |
561 | case 'u': | |
1bbd0b84 | 562 | data[p] = SCM_NUM2ULONG (3,val); |
0f2d19dd JB |
563 | break; |
564 | ||
565 | #if 0 | |
566 | case 'i': | |
1bbd0b84 | 567 | data[p] = SCM_NUM2LONG (3,val); |
0f2d19dd JB |
568 | break; |
569 | ||
570 | case 'd': | |
571 | *((double *)&(data[p])) = scm_num2dbl (val, (char *)SCM_ARG3); | |
572 | break; | |
573 | #endif | |
574 | ||
575 | case 'p': | |
576 | data[p] = val; | |
577 | break; | |
578 | ||
579 | case 's': | |
1bbd0b84 | 580 | SCM_ASSERT (0, SCM_MAKICHR (field_type), "self fields immutable", FUNC_NAME); |
0f2d19dd JB |
581 | break; |
582 | ||
583 | default: | |
1bbd0b84 | 584 | SCM_ASSERT (0, SCM_MAKICHR (field_type), "unrecognized field type", FUNC_NAME); |
0f2d19dd JB |
585 | break; |
586 | } | |
587 | ||
588 | return val; | |
589 | } | |
1bbd0b84 | 590 | #undef FUNC_NAME |
0f2d19dd JB |
591 | |
592 | ||
1bbd0b84 GB |
593 | GUILE_PROC (scm_struct_vtable, "struct-vtable", 1, 0, 0, |
594 | (SCM handle), | |
595 | "") | |
596 | #define FUNC_NAME s_scm_struct_vtable | |
0f2d19dd | 597 | { |
1bbd0b84 | 598 | SCM_VALIDATE_STRUCT(1,handle); |
0f2d19dd JB |
599 | return SCM_STRUCT_VTABLE (handle); |
600 | } | |
1bbd0b84 | 601 | #undef FUNC_NAME |
0f2d19dd JB |
602 | |
603 | ||
1bbd0b84 GB |
604 | GUILE_PROC (scm_struct_vtable_tag, "struct-vtable-tag", 1, 0, 0, |
605 | (SCM handle), | |
606 | "") | |
607 | #define FUNC_NAME s_scm_struct_vtable_tag | |
0f2d19dd | 608 | { |
1bbd0b84 | 609 | SCM_VALIDATE_VTABLE(1,handle); |
ad196599 | 610 | return scm_long2num ((long) SCM_STRUCT_DATA (handle) >> 3); |
98d5f601 | 611 | } |
1bbd0b84 | 612 | #undef FUNC_NAME |
98d5f601 MD |
613 | |
614 | /* {Associating names and classes with vtables} | |
615 | * | |
616 | * The name of a vtable should probably be stored as a slot. This is | |
617 | * a backward compatible solution until agreement has been achieved on | |
618 | * how to associate names with vtables. | |
619 | */ | |
620 | ||
621 | unsigned int | |
622 | scm_struct_ihashq (SCM obj, unsigned int n) | |
623 | { | |
ad196599 MD |
624 | /* The length of the hash table should be a relative prime it's not |
625 | necessary to shift down the address. */ | |
626 | return obj % n; | |
98d5f601 MD |
627 | } |
628 | ||
629 | SCM | |
630 | scm_struct_create_handle (SCM obj) | |
631 | { | |
632 | SCM handle = scm_hash_fn_create_handle_x (scm_struct_table, | |
633 | obj, | |
634 | SCM_BOOL_F, | |
635 | scm_struct_ihashq, | |
636 | scm_sloppy_assq, | |
637 | 0); | |
638 | if (SCM_FALSEP (SCM_CDR (handle))) | |
639 | SCM_SETCDR (handle, scm_cons (SCM_BOOL_F, SCM_BOOL_F)); | |
640 | return handle; | |
641 | } | |
642 | ||
1bbd0b84 GB |
643 | GUILE_PROC (scm_struct_vtable_name, "struct-vtable-name", 1, 0, 0, |
644 | (SCM vtable), | |
645 | "") | |
646 | #define FUNC_NAME s_scm_struct_vtable_name | |
98d5f601 | 647 | { |
1bbd0b84 | 648 | SCM_VALIDATE_VTABLE(1,vtable); |
98d5f601 MD |
649 | return SCM_STRUCT_TABLE_NAME (SCM_CDR (scm_struct_create_handle (vtable))); |
650 | } | |
1bbd0b84 | 651 | #undef FUNC_NAME |
98d5f601 | 652 | |
1bbd0b84 GB |
653 | GUILE_PROC (scm_set_struct_vtable_name_x, "set-struct-vtable-name!", 2, 0, 0, |
654 | (SCM vtable, SCM name), | |
655 | "") | |
656 | #define FUNC_NAME s_scm_set_struct_vtable_name_x | |
98d5f601 | 657 | { |
1bbd0b84 GB |
658 | SCM_VALIDATE_VTABLE(1,vtable); |
659 | SCM_VALIDATE_SYMBOL(2,name); | |
98d5f601 MD |
660 | SCM_SET_STRUCT_TABLE_NAME (SCM_CDR (scm_struct_create_handle (vtable)), |
661 | name); | |
662 | return SCM_UNSPECIFIED; | |
0f2d19dd | 663 | } |
1bbd0b84 | 664 | #undef FUNC_NAME |
0f2d19dd JB |
665 | |
666 | ||
667 | \f | |
668 | ||
bafcafb2 | 669 | void |
1bbd0b84 | 670 | scm_print_struct (SCM exp, SCM port, scm_print_state *pstate) |
bafcafb2 | 671 | { |
4bfdf158 MD |
672 | if (SCM_NFALSEP (scm_procedure_p (SCM_STRUCT_PRINTER (exp)))) |
673 | scm_printer_apply (SCM_STRUCT_PRINTER (exp), exp, port, pstate); | |
674 | else | |
bafcafb2 | 675 | { |
a1ae1799 MD |
676 | SCM vtable = SCM_STRUCT_VTABLE (exp); |
677 | SCM name = scm_struct_vtable_name (vtable); | |
678 | scm_puts ("#<", port); | |
679 | if (SCM_NFALSEP (name)) | |
680 | scm_display (name, port); | |
681 | else | |
682 | scm_puts ("struct", port); | |
683 | scm_putc (' ', port); | |
684 | scm_intprint (vtable, 16, port); | |
b7f3516f | 685 | scm_putc (':', port); |
916d65b1 | 686 | scm_intprint (exp, 16, port); |
b7f3516f | 687 | scm_putc ('>', port); |
bafcafb2 | 688 | } |
bafcafb2 | 689 | } |
1cc91f1b | 690 | |
0f2d19dd JB |
691 | void |
692 | scm_init_struct () | |
0f2d19dd | 693 | { |
98d5f601 MD |
694 | scm_struct_table |
695 | = scm_permanent_object (scm_make_weak_key_hash_table (SCM_MAKINUM (31))); | |
4bfdf158 | 696 | required_vtable_fields = SCM_CAR (scm_intern_obarray ("pruosrpw", sizeof ("pruosrpw") - 1, SCM_BOOL_F)); |
0f2d19dd | 697 | scm_permanent_object (required_vtable_fields); |
4bfdf158 MD |
698 | scm_sysintern ("vtable-index-layout", SCM_MAKINUM (scm_vtable_index_layout)); |
699 | scm_sysintern ("vtable-index-vtable", SCM_MAKINUM (scm_vtable_index_vtable)); | |
700 | scm_sysintern ("vtable-index-printer", SCM_MAKINUM (scm_vtable_index_printer)); | |
701 | scm_sysintern ("vtable-offset-user", SCM_MAKINUM (scm_vtable_offset_user)); | |
0f2d19dd JB |
702 | #include "struct.x" |
703 | } |