aboutsummaryrefslogtreecommitdiff
path: root/gamma/gamma-expat.c
blob: eb9fb1c14443eac0768ea3f5c3f1aa8ca9edf5e5 (plain)
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
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
/* This file is part of Gamma.
   Copyright (C) 2010, 2015 Sergey Poznyakoff

   Gamma is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   Gamma 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with Gamma.  If not, see <http://www.gnu.org/licenses/>. */

#include "gamma-expat.h"


static long gamma_xml_parser_tag;

struct gamma_xml_parser
{
	XML_Parser parser;
};

#define gamma_scm_is_xml_parser(s) \
	(!SCM_IMP(s) && SCM_CELL_TYPE(s) == gamma_xml_parser_tag)

static SCM
gamma_xml_parser_create(XML_Parser parser)
{
	struct gamma_xml_parser *gp;

	gp = scm_gc_malloc(sizeof (*gp), "xml_parser");
	gp->parser = parser;
	SCM_RETURN_NEWSMOB(gamma_xml_parser_tag, gp);
}

#define GAMMA_XML_PARSER_PTR(smob)		\
	((struct gamma_xml_parser *)SCM_CDR(smob))

static size_t
gamma_xml_parser_free(SCM smob)
{
	struct gamma_xml_parser *gp = GAMMA_XML_PARSER_PTR(smob);
	if (gp->parser) {
		struct gamma_expat_user_data *udata =
			XML_GetUserData(gp->parser);
		free(udata);
		XML_ParserFree(gp->parser);
	}
	return 0;
}

static SCM
gamma_xml_parser_mark(SCM smob)
{
	struct gamma_xml_parser *gp = GAMMA_XML_PARSER_PTR(smob);
	struct gamma_expat_user_data *udata;
	int i;
	
	if (!gp->parser)
	    return SCM_BOOL_F;
	udata = XML_GetUserData(gp->parser);
	for (i = 0; i < gamma_expat_handler_count; i++) {
		if (!SCM_UNBNDP(udata->handler[i]))
			scm_gc_mark(udata->handler[i]);
	}
	if (!SCM_UNBNDP(udata->external_entity_ref_handler_arg))
		scm_gc_mark(udata->external_entity_ref_handler_arg);
	return SCM_BOOL_F;
}

static int
gamma_xml_parser_print(SCM smob, SCM port, scm_print_state *pstate)
{
/*	struct gamma_xml_parser *gp = GAMMA_XML_PARSER_PTR(smob);*/

	scm_puts("#<XML_Parser>", port);
	/* FIXME: show more details */
	return 1;
}

static void
gamma_xml_parser_init(void)
{
	 gamma_xml_parser_tag =
		 scm_make_smob_type("XML_Parser",
				    sizeof(struct gamma_xml_parser));
	 scm_set_smob_mark(gamma_xml_parser_tag, gamma_xml_parser_mark);
	 scm_set_smob_free(gamma_xml_parser_tag, gamma_xml_parser_free);
	 scm_set_smob_print(gamma_xml_parser_tag, gamma_xml_parser_print);
}


static struct gamma_expat_user_data *
make_user_data(void)
{
	int i;
	
	struct gamma_expat_user_data *p = scm_malloc(sizeof (*p));
	for (i = 0; i < gamma_expat_handler_count; i++)
		p->handler[i] = SCM_UNSPECIFIED;
	p->external_entity_ref_handler_arg = SCM_UNSPECIFIED;
	return p;
}

SCM_GLOBAL_SYMBOL(gamma_xml_error, "gamma-xml-error");

SCM_DEFINE_PUBLIC(scm_xml_expat_version_string, "xml-expat-version-string",
		  0, 0, 0,
		  (),
		  "Return the version of the expat library as a string.")
{
	return scm_from_locale_string(XML_ExpatVersion());
}

SCM_DEFINE_PUBLIC(scm_xml_expat_version, "xml-expat-version", 0, 0, 0,
		  (),
		  "Return expat library version information.")
{
	XML_Expat_Version vinfo = XML_ExpatVersionInfo();
	return scm_list_3(scm_from_int(vinfo.major),
			  scm_from_int(vinfo.minor),
			  scm_from_int(vinfo.micro));
}

SCM_DEFINE_PUBLIC(scm_xml_primitive_make_parser, "xml-primitive-make-parser",
		  0, 2, 0,
		  (SCM enc, SCM sep),
"Return a new parser. If @var{enc} is given, it must be one of: "
"@samp{US-ASCII}, @samp{UTF-8}, @samp{UTF-16}, @samp{ISO-8859-1}. If @var{sep} "
"is given, the returned parser has namespace processing in effect. "
"In that case, @var{sep} is a character which is used as a "
"separator between the namespace @acronym{URI} and the local part "
"of the name in returned namespace element and attribute names.")
#define FUNC_NAME s_scm_xml_primitive_make_parser
{
	XML_Char *encoding = NULL;
	XML_Char separator = 0;
	XML_Parser parser;
	
	if (!SCM_UNBNDP(enc)) {
		SCM_VALIDATE_STRING(1, enc);
		encoding = scm_to_locale_string(enc);
	}
	if (!SCM_UNBNDP(sep)) {
		SCM_VALIDATE_CHAR(2, sep);
		separator = SCM_CHAR(sep);
		parser = XML_ParserCreateNS(encoding, separator);
	} else
		parser = XML_ParserCreate(encoding);
	if (!parser)
		scm_report_out_of_memory();
	XML_SetUserData(parser, make_user_data());
	free(encoding);
	return gamma_xml_parser_create(parser);
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC(scm_xml_set_encoding, "xml-set-encoding", 2, 0, 0,
		  (SCM parser, SCM enc),
		  "Set the encoding to be used by the @var{parser}.")
#define FUNC_NAME s_scm_xml_set_encoding
{
	struct gamma_xml_parser *gp;
	char *encoding;
	enum XML_Status status;
	
	SCM_ASSERT(gamma_scm_is_xml_parser(parser), parser,
		   SCM_ARG1, FUNC_NAME);
	SCM_VALIDATE_STRING(2, enc);
	
	gp = GAMMA_XML_PARSER_PTR(parser);
	encoding = scm_to_locale_string(enc);
	status = XML_SetEncoding(gp->parser, encoding);
	free(encoding);
	if (status == XML_STATUS_ERROR) {
		enum XML_Error error = XML_GetErrorCode(gp->parser);
		scm_error(gamma_xml_error, FUNC_NAME,
			  "~A",
			  scm_list_1(scm_from_locale_string(XML_ErrorString(error))),
			  SCM_BOOL_F);
	}
	return SCM_UNSPECIFIED;
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC(scm_xml_primitive_parse, "xml-primitive-parse", 3, 0, 0,
		  (SCM parser, SCM input, SCM isfinal),
		  "Parse next piece of input")
#define FUNC_NAME s_scm_xml_primitive_parse
{
	struct gamma_xml_parser *gp;
	char *str;
	enum XML_Status status;
	
	SCM_ASSERT(gamma_scm_is_xml_parser(parser), parser,
		   SCM_ARG1, FUNC_NAME);
	SCM_VALIDATE_STRING(2, input);
	SCM_VALIDATE_BOOL(3, isfinal);

	gp = GAMMA_XML_PARSER_PTR(parser);
	str = scm_to_locale_string(input);
	status = XML_Parse(gp->parser, str, strlen(str),
			   isfinal == SCM_BOOL_T);
	free(str);
	if (status == XML_STATUS_ERROR) {
		enum XML_Error error = XML_GetErrorCode(gp->parser);
		int line = XML_GetCurrentLineNumber(gp->parser);
		int column = XML_GetCurrentColumnNumber(gp->parser);
		int offset, size;
		const char *bufptr;

		bufptr = XML_GetInputContext(gp->parser, &offset, &size);
		scm_error(gamma_xml_error, FUNC_NAME,
			  "~A near line ~A",
			  scm_list_2(scm_from_locale_string(XML_ErrorString(error)),
				     scm_from_int(line)),
			  bufptr ?
			    scm_list_5(scm_from_int(error),
				       scm_from_int(line),
				       scm_from_int(column),
				       scm_from_locale_stringn(bufptr, size),
				       scm_from_int(offset)) :
			    scm_list_3(scm_from_int(error),
				       scm_from_int(line),
				       scm_from_int(column)));
	}
	return SCM_UNSPECIFIED;
		
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC(scm_xml_default_current, "xml-default-current", 1, 0, 0,
		  (SCM parser),
"Pass current markup to the default handler.")
#define FUNC_NAME s_scm_xml_default_current
{
	struct gamma_xml_parser *gp;
	
	SCM_ASSERT(gamma_scm_is_xml_parser(parser), parser,
		   SCM_ARG1, FUNC_NAME);
	gp = GAMMA_XML_PARSER_PTR(parser);
	XML_DefaultCurrent(gp->parser);
	return SCM_UNSPECIFIED;
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC(scm_xml_error_string, "xml-error-string", 1, 0, 0,
		  (SCM code),
"Return a textual description of the error @code{code}.")
#define FUNC_NAME s_scm_xml_error_string
{
	const char *p;
	SCM_ASSERT(scm_is_integer(code), code, SCM_ARG1, FUNC_NAME);
	p = XML_ErrorString(scm_to_int(code));
	return scm_from_locale_string(p);
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC(scm_xml_current_line_number, "xml-current-line-number",
		  1, 0, 0,
		  (SCM parser),
"Return current line number in the input stream. "
"The first line is reported as 1.")
#define FUNC_NAME s_scm_xml_current_line_number
{
	struct gamma_xml_parser *gp;
	
	SCM_ASSERT(gamma_scm_is_xml_parser(parser), parser,
		   SCM_ARG1, FUNC_NAME);
	gp = GAMMA_XML_PARSER_PTR(parser);
	return scm_from_int(XML_GetCurrentLineNumber(gp->parser));
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC(scm_xml_current_column_number, "xml-current-column-number",
		  1, 0, 0,
		  (SCM parser),
"Return current column number in the input stream. "
"The first column is reported as 0.")
#define FUNC_NAME s_scm_xml_current_column_number
{
	struct gamma_xml_parser *gp;
	
	SCM_ASSERT(gamma_scm_is_xml_parser(parser), parser,
		   SCM_ARG1, FUNC_NAME);
	gp = GAMMA_XML_PARSER_PTR(parser);
	return scm_from_int(XML_GetCurrentColumnNumber(gp->parser));
}
#undef FUNC_NAME

SCM_DEFINE_PUBLIC(scm_xml_current_byte_count, "xml-current-byte-count",
		  1, 0, 0,
		  (SCM parser),
"Return the number of bytes in the current event. "
"Returns 0 if the event is inside a reference to an internal "
"entity and for the end-tag event for empty element tags "
"(the later can be used to distinguish empty-element tags "
"from empty elements using separate start and end tags).")
#define FUNC_NAME s_scm_xml_current_byte_count
{
	struct gamma_xml_parser *gp;
	
	SCM_ASSERT(gamma_scm_is_xml_parser(parser), parser,
		   SCM_ARG1, FUNC_NAME);
	gp = GAMMA_XML_PARSER_PTR(parser);
	return scm_from_int(XML_GetCurrentByteCount(gp->parser));
}
#undef FUNC_NAME



static SCM
attrs_to_scm(const XML_Char **attr)
{
	int i;
	SCM scm_first = SCM_EOL, scm_last = SCM_EOL;

	for (i = 0; attr[i]; i += 2) {
		SCM new = scm_cons(scm_cons(scm_from_locale_string(attr[i]),
					    scm_from_locale_string(attr[i + 1])),
				   SCM_EOL);
		if (scm_first == SCM_EOL) 
			scm_last = scm_first = new;
		else {
			SCM_SETCDR(scm_last, new);
			scm_last = new;
		}
	}
	return scm_first;
}

struct apply_data {
	SCM proc;
	SCM arg;
};

SCM
gamma_apply_catch_body(void *data)
{
	struct apply_data *xp = data;
	return scm_apply_0(xp->proc, xp->arg);
}

typedef void (*generic_handler_setter_t) (XML_Parser);


static void XMLCALL
generic_start_handler(void *user_data, const XML_Char *name,
		    const XML_Char **attrs)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[start_element_handler];
	xdata.arg = scm_list_2(scm_from_locale_string(name),
			       attrs_to_scm(attrs));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_start_element_handler(XML_Parser parser)
{
	XML_SetStartElementHandler(parser, generic_start_handler);
}

static void XMLCALL
generic_end_handler(void *user_data, const XML_Char *name)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[end_element_handler];
	xdata.arg = scm_list_1(scm_from_locale_string(name));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_end_element_handler(XML_Parser parser)
{
	XML_SetEndElementHandler(parser, generic_end_handler);
}

static void XMLCALL
data_chunk_handler(SCM proc, const XML_Char *chunk, int len)
{
	struct apply_data xdata;
	xdata.proc = proc;
	xdata.arg = scm_list_1(scm_from_locale_stringn(chunk, len));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void XMLCALL
generic_character_data_handler(void *user_data, const XML_Char *chunk,
			       int len)
{
	struct gamma_expat_user_data *udata = user_data;
	data_chunk_handler(udata->handler[character_data_handler],
			   chunk, len);
}
		
static void
set_generic_character_data_handler(XML_Parser parser)
{
	XML_SetCharacterDataHandler(parser, generic_character_data_handler);
}

static void XMLCALL
generic_processing_instruction_handler(void *user_data,
				       const XML_Char *target,
				       const XML_Char *data)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[processing_instruction_handler];
	xdata.arg = scm_list_2(scm_from_locale_string(target),
			       scm_from_locale_string(data));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_processing_instruction_handler(XML_Parser parser)
{
	XML_SetProcessingInstructionHandler(parser,
				    generic_processing_instruction_handler);
}

static void XMLCALL
generic_comment_handler(void *user_data, const XML_Char *data)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[comment_handler];
	xdata.arg = scm_list_1(scm_from_locale_string(data));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_comment_handler(XML_Parser parser)
{
	XML_SetCommentHandler(parser, generic_comment_handler);
}

static void XMLCALL
generic_start_cdata_section_handler(void *user_data)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[start_cdata_section_handler];
	xdata.arg = SCM_EOL;
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_start_cdata_section_handler(XML_Parser parser)
{
	XML_SetStartCdataSectionHandler(parser,
					generic_start_cdata_section_handler);
}

static void XMLCALL
generic_end_cdata_section_handler(void *user_data)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[end_cdata_section_handler];
	xdata.arg = SCM_EOL;
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_end_cdata_section_handler(XML_Parser parser)
{
	XML_SetEndCdataSectionHandler(parser,
				      generic_end_cdata_section_handler);
}

static void XMLCALL
generic_default_handler(void *user_data, const XML_Char *chunk,
			int len)
{
	struct gamma_expat_user_data *udata = user_data;
	data_chunk_handler(udata->handler[default_handler], chunk, len);
}

static void
set_generic_default_handler(XML_Parser parser)
{
	XML_SetDefaultHandler(parser, generic_default_handler);
}

static void XMLCALL
generic_default_handler_expand(void *user_data, const XML_Char *chunk,
			       int len)
{
	struct gamma_expat_user_data *udata = user_data;
	data_chunk_handler(udata->handler[default_handler_expand], chunk, len);
}

static void
set_generic_default_handler_expand(XML_Parser parser)
{
	XML_SetDefaultHandlerExpand(parser, generic_default_handler_expand);
}

static void XMLCALL
generic_unparsed_entity_decl_handler(void *user_data,
				     const XML_Char *entity_name, 
				     const XML_Char *base,
				     const XML_Char *system_id,
				     const XML_Char *public_id,
				     const XML_Char *notation_name)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[unparsed_entity_decl_handler];
	xdata.arg = scm_list_5(scm_from_locale_string(entity_name),
			       scm_from_locale_string(base),
			       scm_from_locale_string(system_id),
			       scm_from_locale_string(public_id),
			       scm_from_locale_string(notation_name));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_unparsed_entity_decl_handler(XML_Parser parser)
{
	XML_SetUnparsedEntityDeclHandler(parser,
					 generic_unparsed_entity_decl_handler);
}

static void XMLCALL
generic_notation_decl_handler(void *user_data,
			      const XML_Char *notation_name,
			      const XML_Char *base,
			      const XML_Char *system_id,
			      const XML_Char *public_id)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[notation_decl_handler];
	xdata.arg = scm_list_4(scm_from_locale_string(notation_name),
			       scm_from_locale_string(base),
			       scm_from_locale_string(system_id),
			       scm_from_locale_string(public_id));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_notation_decl_handler(XML_Parser parser)
{
	XML_SetNotationDeclHandler(parser,
				   generic_notation_decl_handler);
}

static void XMLCALL
generic_start_namespace_decl_handler(void *user_data,
				     const XML_Char *prefix,
				     const XML_Char *uri)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[start_namespace_decl_handler];
	xdata.arg = scm_list_2(scm_from_locale_string(prefix),
			       scm_from_locale_string(uri));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_start_namespace_decl_handler(XML_Parser parser)
{
	XML_SetStartNamespaceDeclHandler(parser,
					 generic_start_namespace_decl_handler);
}

static void XMLCALL
generic_end_namespace_decl_handler(void *user_data,
				   const XML_Char *prefix)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[end_namespace_decl_handler];
	xdata.arg = scm_list_1(scm_from_locale_string(prefix));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_end_namespace_decl_handler(XML_Parser parser)
{
	XML_SetEndNamespaceDeclHandler(parser,
				       generic_end_namespace_decl_handler);
}


static void XMLCALL
generic_skipped_entity_handler(void *user_data,
			       const XML_Char *entity_name,
			       int is_parameter_entity)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[skipped_entity_handler];
	xdata.arg = scm_list_2(scm_from_locale_string(entity_name),
			       is_parameter_entity ? SCM_BOOL_T : SCM_BOOL_F);
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_skipped_entity_handler(XML_Parser parser)
{
	XML_SetSkippedEntityHandler(parser, generic_skipped_entity_handler);
}
		

static int XMLCALL
generic_not_standalone_handler(void *user_data)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[not_standalone_handler];
	xdata.arg = SCM_EOL;
	/* FIXME: Result? */
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
	return 0;
}

static void
set_generic_not_standalone_handler(XML_Parser parser)
{
	XML_SetNotStandaloneHandler(parser,
				    generic_not_standalone_handler);
}

static void XMLCALL
generic_xml_decl_handler(void *user_data,
			 const XML_Char *version,
			 const XML_Char *encoding,
			 int  standalone)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[xml_decl_handler];
	xdata.arg = scm_list_3(version ?
			       scm_from_locale_string(version) : SCM_BOOL_F,
			       encoding ?
			       scm_from_locale_string(encoding) : SCM_BOOL_F,
			       standalone == -1 ?
			         SCM_UNSPECIFIED :
			       scm_list_1 (standalone ?
					   SCM_BOOL_T : SCM_BOOL_F));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_xml_decl_handler(XML_Parser parser)
{
	XML_SetXmlDeclHandler(parser, generic_xml_decl_handler);
}

static void XMLCALL
generic_start_doctype_decl_handler(void *user_data,
				   const XML_Char *doctype_name,
				   const XML_Char *sysid,
				   const XML_Char *pubid,
				   int has_internal_subset)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[start_doctype_decl_handler];
	xdata.arg = scm_list_4(scm_from_locale_string(doctype_name),
			       sysid ? scm_from_locale_string(sysid) :
			               SCM_BOOL_F,
			       pubid ? scm_from_locale_string(pubid) :
			               SCM_BOOL_F,
			       (has_internal_subset ? SCM_BOOL_T : SCM_BOOL_F));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_start_doctype_decl_handler(XML_Parser parser)
{
	XML_SetStartDoctypeDeclHandler(parser,
				       generic_start_doctype_decl_handler);
}

static void XMLCALL
generic_end_doctype_decl_handler(void *user_data)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[end_doctype_decl_handler];
	xdata.arg = SCM_EOL;
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_end_doctype_decl_handler(XML_Parser parser)
{
	XML_SetEndDoctypeDeclHandler(parser,
				     generic_end_doctype_decl_handler);
}

static void XMLCALL
generic_attlist_decl_handler(void *user_data,
			     const XML_Char *elname,
			     const XML_Char *attname,
			     const XML_Char *att_type,
			     const XML_Char *dflt,
			     int isrequired)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[attlist_decl_handler];
	xdata.arg = scm_list_4(scm_from_locale_string(elname),
			       scm_from_locale_string(attname),
			       scm_from_locale_string(att_type),
			       dflt ? scm_from_locale_string(dflt) :
			         (isrequired ? SCM_BOOL_T : SCM_BOOL_F));
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_attlist_decl_handler(XML_Parser parser)
{
	XML_SetAttlistDeclHandler(parser,
				  generic_attlist_decl_handler);
}

static void XMLCALL
generic_entity_decl_handler(void *user_data,
			    const XML_Char *entity_name,
			    int            is_parameter_entity,
			    const XML_Char *value,
			    int            value_length, 
			    const XML_Char *base,
			    const XML_Char *system_id,
			    const XML_Char *public_id,
			    const XML_Char *notation_name)
{
	struct apply_data xdata;
	struct gamma_expat_user_data *udata = user_data;

	xdata.proc = udata->handler[attlist_decl_handler];
	xdata.arg = scm_list_n(scm_from_locale_string(entity_name),
			       is_parameter_entity ? SCM_BOOL_T : SCM_BOOL_F,
			       value ? scm_from_locale_stringn(value,
							       value_length) :
			               SCM_BOOL_F,
			       scm_from_locale_string(base),
			       scm_from_locale_string(system_id),
			       scm_from_locale_string(public_id),
			       notation_name ?
			         scm_from_locale_string(notation_name) :
			         SCM_BOOL_F,
			       SCM_UNDEFINED);
	gamma_safe_exec(gamma_apply_catch_body, &xdata, NULL);
}

static void
set_generic_entity_decl_handler(XML_Parser parser)
{
	XML_SetEntityDeclHandler(parser, generic_entity_decl_handler);
}

static void
FIXME_set_handler(XML_Parser parser)
{
	scm_misc_error (NULL, "handler not implemented yet", SCM_EOL);
}



struct set_handler_def {
	char *name;
	SCM key;
	generic_handler_setter_t setter;
};
	
struct set_handler_def handler_setter_tab[gamma_expat_handler_count+1] = {
	{ "start-element-handler",
	  SCM_EOL,
	  set_generic_start_element_handler },
	{ "end-element-handler",
	  SCM_EOL,
	  set_generic_end_element_handler },
	{ "character-data-handler",
	  SCM_EOL,
	  set_generic_character_data_handler },
	{ "processing-instruction-handler",
	  SCM_EOL,
	  set_generic_processing_instruction_handler },
	{ "comment-handler",
	  SCM_EOL,
	  set_generic_comment_handler },
	{ "start-cdata-section-handler",
	  SCM_EOL,
	  set_generic_start_cdata_section_handler },
	{ "end-cdata-section-handler",
	  SCM_EOL,
	  set_generic_end_cdata_section_handler },
	{ "default-handler",
	  SCM_EOL,
	  set_generic_default_handler },
	{ "default-handler-expand",
	  SCM_EOL,
	  set_generic_default_handler_expand },
	{ "external-entity-ref-handler",
	  SCM_EOL,
	  FIXME_set_handler },
	{ "skipped-entity-handler",
	  SCM_EOL,
	  set_generic_skipped_entity_handler },
	{ "unknown-encoding-handler",
	  SCM_EOL,
	  FIXME_set_handler },
	{ "start-namespace-decl-handler",
	  SCM_EOL,
	  set_generic_start_namespace_decl_handler },
	{ "end-namespace-decl-handler",
	  SCM_EOL,
	  set_generic_end_namespace_decl_handler },
	{ "xml-decl-handler",
	  SCM_EOL,
	  set_generic_xml_decl_handler },
	{ "start-doctype-decl-handler",
	  SCM_EOL,
	  set_generic_start_doctype_decl_handler },
	{ "end-doctype-decl-handler",
	  SCM_EOL,
	  set_generic_end_doctype_decl_handler },
	{ "element-decl-handler",
	  SCM_EOL,
	  FIXME_set_handler },
	{ "attlist-decl-handler",
	  SCM_EOL,
	  set_generic_attlist_decl_handler },
	{ "entity-decl-handler",
	  SCM_EOL,
	  set_generic_entity_decl_handler },
	{ "unparsed-entity-decl-handler",
	  SCM_EOL,
	  set_generic_unparsed_entity_decl_handler },
	{ "notation-decl-handler",
	  SCM_EOL,
	  set_generic_notation_decl_handler },
	{ "not-standalone-handler",
	  SCM_EOL,
	  set_generic_not_standalone_handler },
	{ NULL }
};

static void
init_generic_handler_setter()
{
	struct set_handler_def *p;
	
	for (p = handler_setter_tab; p->name; p++)
		p->key = scm_permanent_object(scm_from_locale_keyword(p->name));
}
	

static int
find_generic_handler_setter(SCM key)
{
	int i;

	for (i = 0; handler_setter_tab[i].name; i++)
		if (handler_setter_tab[i].key == key)
			return i;
	return -1;
}
	
SCM_DEFINE_PUBLIC(scm_xml_primitive_set_handler, "xml-primitive-set-handler",
		  3, 0, 0,
		  (SCM parser, SCM key, SCM handler),
"Set XML callback handler for event @code{key} in parser @var{parser} "
"to @var{handler}.")
#define FUNC_NAME s_scm_xml_primitive_set_handler
{
	struct gamma_xml_parser *gp;
	struct gamma_expat_user_data *udata;
	int sn;
	
	SCM_ASSERT(gamma_scm_is_xml_parser(parser), parser,
		   SCM_ARG1, FUNC_NAME);
	SCM_ASSERT(scm_is_keyword(key), key, SCM_ARG2, FUNC_NAME);
	SCM_VALIDATE_PROC(3, handler);

	sn = find_generic_handler_setter (key);
	if (sn == -1)
		scm_out_of_range(FUNC_NAME, key);

	gp = GAMMA_XML_PARSER_PTR(parser);
	udata = XML_GetUserData(gp->parser);
	udata->handler[sn] = handler;
	handler_setter_tab[sn].setter(gp->parser);
	return SCM_UNSPECIFIED;
}
#undef FUNC_NAME




struct gamma_int_trans {
	int val;
	const char *name;
};

static struct gamma_int_trans expat_code_tab[] = {
#define GAMMA_CONST(s) { s, #s }
	/* XML_Status */
	GAMMA_CONST(XML_STATUS_ERROR),
	GAMMA_CONST(XML_STATUS_OK),
	GAMMA_CONST(XML_STATUS_SUSPENDED),
	/* XML_Error */
	GAMMA_CONST(XML_ERROR_NONE),
	GAMMA_CONST(XML_ERROR_NO_MEMORY),
	GAMMA_CONST(XML_ERROR_SYNTAX),
	GAMMA_CONST(XML_ERROR_NO_ELEMENTS),
	GAMMA_CONST(XML_ERROR_INVALID_TOKEN),
	GAMMA_CONST(XML_ERROR_UNCLOSED_TOKEN),
	GAMMA_CONST(XML_ERROR_PARTIAL_CHAR),
	GAMMA_CONST(XML_ERROR_TAG_MISMATCH),
	GAMMA_CONST(XML_ERROR_DUPLICATE_ATTRIBUTE),
	GAMMA_CONST(XML_ERROR_JUNK_AFTER_DOC_ELEMENT),
	GAMMA_CONST(XML_ERROR_PARAM_ENTITY_REF),
	GAMMA_CONST(XML_ERROR_UNDEFINED_ENTITY),
	GAMMA_CONST(XML_ERROR_RECURSIVE_ENTITY_REF),
	GAMMA_CONST(XML_ERROR_ASYNC_ENTITY),
	GAMMA_CONST(XML_ERROR_BAD_CHAR_REF),
	GAMMA_CONST(XML_ERROR_BINARY_ENTITY_REF),
	GAMMA_CONST(XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF),
	GAMMA_CONST(XML_ERROR_MISPLACED_XML_PI),
	GAMMA_CONST(XML_ERROR_UNKNOWN_ENCODING),
	GAMMA_CONST(XML_ERROR_INCORRECT_ENCODING),
	GAMMA_CONST(XML_ERROR_UNCLOSED_CDATA_SECTION),
	GAMMA_CONST(XML_ERROR_EXTERNAL_ENTITY_HANDLING),
	GAMMA_CONST(XML_ERROR_NOT_STANDALONE),
	GAMMA_CONST(XML_ERROR_UNEXPECTED_STATE),
	GAMMA_CONST(XML_ERROR_ENTITY_DECLARED_IN_PE),
	GAMMA_CONST(XML_ERROR_FEATURE_REQUIRES_XML_DTD),
	GAMMA_CONST(XML_ERROR_CANT_CHANGE_FEATURE_ONCE_PARSING),
	GAMMA_CONST(XML_ERROR_UNBOUND_PREFIX),
	GAMMA_CONST(XML_ERROR_UNDECLARING_PREFIX),
	GAMMA_CONST(XML_ERROR_INCOMPLETE_PE),
	GAMMA_CONST(XML_ERROR_XML_DECL),
	GAMMA_CONST(XML_ERROR_TEXT_DECL),
	GAMMA_CONST(XML_ERROR_PUBLICID),
	GAMMA_CONST(XML_ERROR_SUSPENDED),
	GAMMA_CONST(XML_ERROR_NOT_SUSPENDED),
	GAMMA_CONST(XML_ERROR_ABORTED),
	GAMMA_CONST(XML_ERROR_FINISHED),
	GAMMA_CONST(XML_ERROR_SUSPEND_PE),
	/* XML_Content_Type */
	GAMMA_CONST(XML_CTYPE_EMPTY),
	GAMMA_CONST(XML_CTYPE_ANY),
	GAMMA_CONST(XML_CTYPE_MIXED),
	GAMMA_CONST(XML_CTYPE_NAME),
	GAMMA_CONST(XML_CTYPE_CHOICE),
	GAMMA_CONST(XML_CTYPE_SEQ),
	/* XML_Content_Quant */
	GAMMA_CONST(XML_CQUANT_NONE),
	GAMMA_CONST(XML_CQUANT_OPT),
	GAMMA_CONST(XML_CQUANT_REP),
	GAMMA_CONST(XML_CQUANT_PLUS)
#undef GAMMA_CONST
};
	
	
void
gamma_expat_init()
{
	int i;
  
	for (i = 0; i < sizeof(expat_code_tab)/sizeof(expat_code_tab[0]); i++) {
		scm_c_define (expat_code_tab[i].name,
			      scm_from_int(expat_code_tab[i].val));
		scm_c_export (expat_code_tab[i].name, NULL);
	}

	gamma_xml_parser_init();
	init_generic_handler_setter();
#include <gamma-expat.x>

}

Return to:

Send suggestions and report system problems to the System administrator.