1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
|
/* "record.c" code for (R5RS) proposed "Record" user definable datatypes.
* Copyright (C) 1994, 1995, 1997 Free Software Foundation, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*/
/* Author: Radey Shouman */
#include "scm.h"
long tc16_record;
/* Record-type-descriptor for record-type-descriptors */
static SCM the_rtd_rtd;
/* Record <= [rtd, elt ... ]
RTD <= [rtd, name, (field ...), printer]
Predicate <= [cclo-procedure, rtd]
Accessor, Modifier <= [cclo-procedure, rtd, index]
Constructor <= [cclo-procedure, rtd, record-size, #(index ...)] */
#define REC_RTD(x) (VELTS(x)[0])
#define RECP(x) (tc16_record==TYP16(x))
#define RTDP(x) (RECP(x) && the_rtd_rtd==REC_RTD(x))
#define RTD_NAME(x) (VELTS(x)[1])
#define RTD_FIELDS(x) (VELTS(x)[2])
#define RTD_PRINTER(x) (VELTS(x)[3])
#define RCLO_RTD(x) (VELTS(x)[1])
#define RCLO_INDEX(x) (VELTS(x)[2]) /* For accessors, modifiers */
#define RCONSTR_SIZE(x) (VELTS(x)[2])
#define RCONSTR_INDICES(x) (VELTS(x)[3])
/* If we are compiling this as a dll, then we cannot assume that
arrays will be available when the dll is loaded */
#ifdef ARRAYS
# ifndef DLL
# define MAKE_REC_INDS(n) make_uve((long)n, MAKINUM(32L))
# define REC_IND_REF(x, i) VELTS(x)[(i)]
# define REC_IND_SET(x, i, val) VELTS(x)[(i)] = (val)
# endif
#endif
#ifndef MAKE_REC_INDS
# define MAKE_REC_INDS(n) make_vector(MAKINUM(n), INUM0)
# define REC_IND_REF(x, i) INUM(VELTS(x)[(i)])
# define REC_IND_SET(x, i, val) VELTS(x)[(i)] = MAKINUM(val)
#endif
static char s_record[] = "record";
static char s_recordp[] = "record?";
SCM recordp(obj)
SCM obj;
{
return (NIMP(obj) && RECP(obj) ? BOOL_T : BOOL_F);
}
SCM rec_pred1(cclo, obj)
SCM cclo, obj;
{
if (NIMP(obj) && RECP(obj) && (REC_RTD(obj)==RCLO_RTD(cclo)))
return BOOL_T;
return BOOL_F;
}
static SCM f_rec_pred1;
static char s_rec_pred[] = "record-predicate";
SCM rec_pred(rtd)
SCM rtd;
{
SCM cclo = makcclo(f_rec_pred1, 2L);
ASRTER(NIMP(rtd) && RTDP(rtd), rtd, ARG1, s_rec_pred);
RCLO_RTD(cclo) = rtd;
return cclo;
}
static char s_rec_rtd[] = "record-type-descriptor";
SCM rec_rtd(rec)
SCM rec;
{
if (IMP(rec) || !RECP(rec)) return BOOL_F;
return REC_RTD(rec);
}
static SCM f_rec_constr1;
static char s_rec_constr[] = "record-constructor";
SCM rec_constr(rtd, flds)
SCM rtd, flds;
{
SCM flst, fld;
SCM cclo = makcclo(f_rec_constr1, 4L);
SCM indices;
sizet i, j;
ASRTER(NIMP(rtd) && RTDP(rtd), rtd, ARG1, s_rec_constr);
RCLO_RTD(cclo) = rtd;
i = ilength(RTD_FIELDS(rtd));
RCONSTR_SIZE(cclo) = MAKINUM(i);
if (UNBNDP(flds)) {
indices = MAKE_REC_INDS(i);
while (i--) REC_IND_SET(indices, i, i+1);
}
else {
i = ilength(flds);
ASRTER(i>=0, flds, ARG2, s_rec_constr);
indices = MAKE_REC_INDS(i);
for (i = 0; NIMP(flds); i++, flds = CDR(flds)) {
fld = CAR(flds);
ASRTER(NIMP(fld) && SYMBOLP(fld), fld, ARG2, s_rec_constr);
flst = RTD_FIELDS(rtd);
for (j = 0; ; j++, flst = CDR(flst)) {
ASRTER(NNULLP(flst), fld, ARG2, s_rec_constr);
if (fld==CAR(flst)) {
REC_IND_SET(indices, i, j+1);
break;
}
}
}
}
RCONSTR_INDICES(cclo) = indices;
return cclo;
}
#ifndef RECKLESS
static void rec_error(arg, pos, what, rtd, i)
SCM arg, rtd;
int i;
char *pos, *what;
{
SCM recname = RTD_NAME(rtd);
SCM fld = RTD_FIELDS(rtd);
SCM mesg = makfrom0str(what);
if (i > 0) {
while (--i) fld = CDR(fld);
fld = CAR(fld);
mesg = st_append(cons2(mesg, recname,
cons2(makfrom0str(" -> "), symbol2string(fld), EOL)));
}
else
mesg = st_append(cons2(mesg, recname, EOL));
wta(arg, pos, CHARS(mesg));
}
#endif
static char s_rec_constr1[] = "record constructor: ";
SCM rec_constr1(args)
SCM args;
{
SCM cclo = CAR(args);
SCM rec, inds = RCONSTR_INDICES(cclo);
sizet i = INUM(RCONSTR_SIZE(cclo));
args = CDR(args);
DEFER_INTS;
rec = must_malloc_cell((i+1L)*sizeof(SCM),
MAKE_NUMDIGS(i+1L, tc16_record), s_record);
while (i--)
VELTS(rec)[i+1] = UNSPECIFIED;
REC_RTD(rec) = RCLO_RTD(cclo);
ALLOW_INTS;
for (i = 0; i < LENGTH(inds); i++, args = CDR(args)) {
#ifndef RECKLESS
if (NULLP(args))
wna: rec_error(UNDEFINED, WNA, s_rec_constr1, RCLO_RTD(cclo), -1);
#endif
VELTS(rec)[ REC_IND_REF(inds, i) ] = CAR(args);
}
ASRTGO(NULLP(args), wna);
return rec;
}
/* Makes an accessor or modifier.
A cclo with 2 env elts -- rtd and field-number. */
static SCM makrecclo(proc, rtd, field, what)
SCM proc, rtd, field;
const char *what;
{
SCM flst;
SCM cclo = makcclo(proc, 3L);
int i;
ASRTER(NIMP(rtd) && RTDP(rtd), rtd, ARG1, what);
ASRTER(NIMP(field) && SYMBOLP(field), field, ARG2, what);
RCLO_RTD(cclo) = rtd;
flst = RTD_FIELDS(rtd);
for (i = 1; ; i++) {
ASRTER(NNULLP(flst), field, ARG2, what);
if (CAR(flst)==field) break;
flst = CDR(flst);
}
RCLO_INDEX(cclo) = MAKINUM(i);
return cclo;
}
static char s_rec_accessor1[] = "record accessor: ";
SCM rec_accessor1(cclo, rec)
SCM cclo, rec;
{
register int i = INUM(RCLO_INDEX(cclo));
#ifndef RECKLESS
if (IMP(rec) || !RECP(rec) || RCLO_RTD(cclo)!=REC_RTD(rec))
rec_error(rec, ARG1, s_rec_accessor1, RCLO_RTD(cclo), i);
#endif
return VELTS(rec)[i];
}
static char s_rec_modifier1[] = "record modifier: ";
SCM rec_modifier1(cclo, rec, val)
SCM cclo, rec, val;
{
register int i = INUM(RCLO_INDEX(cclo));
#ifndef RECKLESS
if (IMP(rec) || !RECP(rec) || RCLO_RTD(cclo)!=REC_RTD(rec))
rec_error(rec, ARG1, s_rec_modifier1, RCLO_RTD(cclo), i);
#endif
VELTS(rec)[i] = val;
return UNSPECIFIED;
}
static SCM f_rec_accessor1;
static char s_rec_accessor[] = "record-accessor";
SCM rec_accessor(rtd, field)
SCM rtd, field;
{
return makrecclo(f_rec_accessor1, rtd, field, s_rec_accessor);
}
static SCM f_rec_modifier1;
static char s_rec_modifier[] = "record-modifier";
SCM rec_modifier(rtd, field)
SCM rtd, field;
{
return makrecclo(f_rec_modifier1, rtd, field, s_rec_accessor);
}
SCM *loc_makrtd;
static char s_makrectyp[] = "make-record-type";
SCM makrectyp(name, fields)
SCM name, fields;
{
SCM n, argv[2];
#ifndef RECKLESS
if (ilength(fields) < 0)
errout: wta(fields, (char *)ARG2, s_makrectyp);
for (n = fields; NIMP(n); n = CDR(n))
if (!SYMBOLP(CAR(n))) goto errout;
#endif
argv[0] = name;
argv[1] = fields;
return scm_cvapply(*loc_makrtd, 2L, argv);
}
static char s_rec_prinset[] = "record-printer-set!";
SCM rec_prinset(rtd, printer)
SCM rtd, printer;
{
ASRTER(NIMP(rtd) && RTDP(rtd), rtd, ARG1, s_rec_prinset);
ASRTER(BOOL_F==printer || scm_arity_check(printer, 3L, (char *)0),
printer, ARG2, s_rec_prinset);
RTD_PRINTER(rtd) = printer;
return UNSPECIFIED;
}
static SCM markrec(ptr)
SCM ptr;
{
sizet i;
for (i = NUMDIGS(ptr); --i;)
if (NIMP(VELTS(ptr)[i])) gc_mark(VELTS(ptr)[i]);
return REC_RTD(ptr);
}
static sizet freerec(ptr)
CELLPTR ptr;
{
must_free(CHARS((SCM)ptr), sizeof(SCM)*NUMDIGS((SCM)ptr));
return 0;
}
static int recprin1(exp, port, writing)
SCM exp, port;
int writing;
{
SCM names, printer = RTD_PRINTER(REC_RTD(exp));
SCM argv[3];
sizet i;
if (NIMP(printer)) {
argv[0] = exp;
argv[1] = port;
argv[2] = writing ? BOOL_T : BOOL_F;
/* A writing value of 2 means we are printing an error message.
An error in a record printer at this time will result in a
fatal recursive error. */
if (2 != writing) {
if (NFALSEP(scm_cvapply(printer, 3L, argv)))
return 1;
}
else {
lputs("\n; Ignoring record-printer: ", cur_errp);
}
}
names = RTD_FIELDS(REC_RTD(exp));
lputs("#s(", port);
scm_iprin1(RTD_NAME(REC_RTD(exp)), port, 0);
if (writing) {
lputc(':', port);
scm_intprint(((long)REC_RTD(exp))>>1, 16, port);
}
for (i = 1; i < NUMDIGS(exp); i++) {
lputc(' ', port);
scm_iprin1(CAR(names), port, 0);
names = CDR(names);
lputc(' ', port);
scm_iprin1(VELTS(exp)[i], port, writing);
}
lputc(')', port);
/*
lputs("#<record <", port);
scm_iprin1(RTD_NAME(REC_RTD(exp)), port, 0);
lputc('>', port);
for (i = 1; i < NUMDIGS(exp); i++) {
lputc(' ', port);
scm_iprin1(VELTS(exp)[i], port, writing);
}
lputc('>', port);
*/
return 1;
}
static SCM f_rtdprin1;
SCM rec_rtdprin1(rtd, port, writing_p)
SCM rtd, port, writing_p;
{
lputs("#s(record-type ", port);
scm_iprin1(RTD_NAME(rtd), port, 0);
lputc(':', port);
scm_intprint(((long)rtd)>>1, 16, port);
lputs(" fields ", port);
scm_iprin1(RTD_FIELDS(rtd), port, 0);
if (NIMP(RTD_PRINTER(rtd)))
lputs(" P)", port);
else
lputc(')', port);
return BOOL_T;
}
SCM recequal(rec0, rec1)
SCM rec0, rec1;
{
sizet i = NUMDIGS(rec0);
if (i != NUMDIGS(rec1)) return BOOL_F;
if (REC_RTD(rec0) != REC_RTD(rec1)) return BOOL_F;
while(--i)
if (FALSEP(equal(VELTS(rec0)[i], VELTS(rec1)[i])))
return BOOL_F;
return BOOL_T;
}
static smobfuns recsmob = {markrec, freerec, recprin1, recequal};
static iproc subr1s[] = {
{s_recordp, recordp},
{s_rec_pred, rec_pred},
{s_rec_rtd, rec_rtd},
{0, 0}};
static iproc subr2s[] = {
{s_rec_accessor, rec_accessor},
{s_rec_modifier, rec_modifier},
{s_makrectyp, makrectyp},
{s_rec_prinset, rec_prinset},
{0, 0}};
SCM_DLL_EXPORT void init_record P((void));
void init_record()
{
SCM i_name = CAR(sysintern("name", UNDEFINED));
SCM i_fields = CAR(sysintern("fields", UNDEFINED));
SCM i_printer = CAR(sysintern("printer", UNDEFINED));
SCM the_rtd, rtd_name = makfrom0str("record-type");
SCM rtd_fields = cons2(i_name, i_fields, cons(i_printer, EOL));
tc16_record = newsmob(&recsmob);
f_rtdprin1 = make_subr(" rtdprin1", tc7_subr_3, rec_rtdprin1);
DEFER_INTS;
the_rtd = must_malloc_cell(4L * sizeof(SCM),
MAKE_NUMDIGS(4L, tc16_record), s_record);
REC_RTD(the_rtd) = the_rtd;
RTD_NAME(the_rtd) = rtd_name;
RTD_FIELDS(the_rtd) = rtd_fields;
RTD_PRINTER(the_rtd) = f_rtdprin1;
ALLOW_INTS;
the_rtd_rtd = the_rtd; /* Protected by make-record-type */
f_rec_pred1 = make_subr(" record-predicate-procedure", tc7_subr_2, rec_pred1);
f_rec_constr1 = make_subr(s_rec_constr1, tc7_lsubr, rec_constr1);
f_rec_accessor1 = make_subr(s_rec_accessor1, tc7_subr_2, rec_accessor1);
f_rec_modifier1 = make_subr(s_rec_modifier1, tc7_subr_3, rec_modifier1);
make_subr(s_rec_constr, tc7_subr_2o, rec_constr);
init_iprocs(subr1s, tc7_subr_1);
init_iprocs(subr2s, tc7_subr_2);
sysintern("record-type-descriptor?", rec_pred(the_rtd_rtd));
sysintern("record-type-name", rec_accessor(the_rtd_rtd, i_name));
sysintern("record-type-field-names", rec_accessor(the_rtd_rtd, i_fields));
loc_makrtd = &CDR(sysintern("RTD:make",
rec_constr(the_rtd_rtd, cons2(i_name, i_fields, EOL))));
add_feature(s_record);
}
|