aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/lib/modules/im/ximcp/imCallbk.c
blob: 4e091d8ef0cabd36d93d9bacfe021820b6180930 (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
/***********************************************************************
Copyright 1993 by Digital Equipment Corporation, Maynard, Massachusetts,
Copyright 1994 by FUJITSU LIMITED
Copyright 1994 by Sony Corporation

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Digital, FUJITSU
LIMITED and Sony Corporation not be used in advertising or publicity
pertaining to distribution of the software without specific, written
prior permission.

DIGITAL, FUJITSU LIMITED AND SONY CORPORATION DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL DIGITAL, FUJITSU LIMITED
AND SONY CORPORATION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.

  Author: Hiroyuki Miyamoto  Digital Equipment Corporation
                             miyamoto@jrd.dec.com
  Modifier: Takashi Fujiwara FUJITSU LIMITED
			     fujiwara@a80.tech.yk.fujitsu.co.jp
	    Makoto Wakamatsu Sony Corporation
		 	     makoto@sm.sony.co.jp

***********************************************************************/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "Xlibint.h"
#include "Xlcint.h"
#include "Ximint.h"
#include "XlcPubI.h"

#define sz_CARD8                 1
#define sz_INT8                  1
#define sz_CARD16                2
#define sz_INT16                 2
#define sz_BITMASK16             sz_CARD16
#define sz_CARD32                4
#define sz_INT32                 4
#define sz_BITMASK32             sz_CARD32
#define sz_XIMID                 sizeof(XIMID)
#define sz_XICID                 sizeof(XICID)
#define sz_XIMATTRID             sizeof(XIMATTRID)
#define sz_XICATTRID             sizeof(XICATTRID)
#define sz_ximPacketHeader       (XIM_HEADER_SIZE + sz_XIMID + sz_XICID)
#define sz_ximGeometry           0
#define sz_ximStrConversion      (sz_CARD32 + sz_CARD32 + sz_CARD32 + sz_CARD32)
#define sz_ximPreeditStart       0
#define sz_ximPreeditStartReply  sz_INT32
#define sz_ximPreeditCaret       (sz_INT32 + sz_CARD32 + sz_CARD32)
#define sz_ximPreeditCaretReply  sz_CARD32
#define sz_ximPreeditDone        0
#define sz_ximStatusStart        0
#define sz_ximStatusDone         0

typedef enum {
    XimCbSuccess,
    XimCbNoCallback,
    XimCbError,
    XimCbQueued,
    XimCbBadContextID,
    XimCbBadOpcode
} XimCbStatus;

typedef XimCbStatus (*XimCb)(
			     Xim, Xic, char*, int
			     );

#define PACKET_TO_MAJOROPCODE(p) (*(CARD8*)((CARD8*)(p)))
#define PACKET_TO_MINOROPCODE(p) (*(CARD8*)((CARD8*)(p) + sz_CARD8))
#define PACKET_TO_LENGTH(p) (*(CARD16*)((CARD8*)(p) + sz_CARD8 + sz_CARD8))
#define PACKET_TO_IMID(p) (*(XIMID*)((CARD8*)(p) + XIM_HEADER_SIZE))
#define PACKET_TO_ICID(p) (*(XICID*)((CARD8*)(p) + XIM_HEADER_SIZE + sz_XIMID))

#define _XimWriteData(im,len,data) \
    (im->private.proto.write((im),(len),(XPointer)(data)))
#define _XimReadData(im,buf,buf_len,len) \
    (im->private.proto.read((im),(XPointer)(buf),(buf_len),&(len)))
#define _XimFlushData(im) im->private.proto.flush((im))

static XimCbStatus _XimGeometryCallback(Xim, Xic, char*, int);
static XimCbStatus _XimStrConversionCallback(Xim, Xic, char*, int);
static XimCbStatus _XimPreeditStartCallback(Xim, Xic, char*, int);
static XimCbStatus _XimPreeditDoneCallback(Xim, Xic, char*, int);
static void _free_memory_for_text(XIMText*);
static XimCbStatus _XimPreeditDrawCallback(Xim, Xic, char*, int);
static XimCbStatus _XimPreeditCaretCallback(Xim, Xic, char*, int);
static XimCbStatus _XimStatusStartCallback(Xim, Xic, char*, int);
static XimCbStatus _XimStatusDoneCallback(Xim, Xic, char*, int);
static XimCbStatus _XimStatusDrawCallback(Xim, Xic, char*, int);
static XimCbStatus _XimPreeditStateNotifyCallback(Xim, Xic, char *, int);

#if defined(__STDC__) && ((defined(sun) && defined(SVR4)) || defined(WIN32))
#define RConst /**/
#else
#define RConst const
#endif

/* NOTE:
 * the table below depends on the protocol number
 * defined in the IM Protocol document.
 */
static RConst XimCb callback_table[] = {
    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* #000-009 */
    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* #010-019 */
    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* #020-029 */
    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* #030-039 */
    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* #040-049 */
    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* #050-059 */
    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* #060-069 */
    _XimGeometryCallback,	/* #070 */
    _XimStrConversionCallback,	/* #071 */
    NULL,			/* #072 */
    _XimPreeditStartCallback,	/* #073 */
    NULL,			/* #074 */
    _XimPreeditDrawCallback,	/* #075 */
    _XimPreeditCaretCallback,	/* #076 */
    NULL,			/* #077 */
    _XimPreeditDoneCallback,	/* #078 */
    _XimStatusStartCallback,	/* #079 */
    _XimStatusDrawCallback,	/* #080 */
    _XimStatusDoneCallback,	/* #081 */
    _XimPreeditStateNotifyCallback	/* #082 */
    };


static Bool
_XimIsReadyForProcess(Xic ic)
{
    return(!ic->private.proto.waitCallback); /* check HM */
}

static void
_XimProcessPendingCallbacks(Xic ic)
{
    XimPendingCallback pcbq;

    while (((pcbq = ic->private.proto.pend_cb_que) != (XimPendingCallback)NULL)
	   && _XimIsReadyForProcess(ic)) {
	(void) (*callback_table[pcbq->major_opcode])(pcbq->im,
						     pcbq->ic,
						     pcbq->proto,
						     pcbq->proto_len);
	ic->private.proto.pend_cb_que = pcbq->next;
	Xfree(pcbq->proto);	/* free memory of XimPendingCallback */
	Xfree(pcbq);
    }
}

static void
_XimPutCbIntoQueue(Xic ic, XimPendingCallback call_data)
{
    XimPendingCallback pcbq = ic->private.proto.pend_cb_que;

    /* Queuing is FIFO
     */
    while (pcbq != (XimPendingCallback)NULL) {
	if (pcbq->next == (XimPendingCallback)NULL) {
	    break;
	}
	pcbq = pcbq->next;
    }
    if (pcbq == (XimPendingCallback)NULL) {
	ic->private.proto.pend_cb_que = call_data;
    }
    else {
	pcbq->next = call_data;
    }
}

Bool
_XimCbDispatch(Xim xim,
	       INT16 len,
	       XPointer data,
	       XPointer call_data)
{
    /* `data' points to the beginning of the packet defined in IM Protocol doc.
     */
    int major_opcode = PACKET_TO_MAJOROPCODE(data);
    XIMID imid = PACKET_TO_IMID(data);
    XICID icid = PACKET_TO_ICID(data);
    Xim im = (Xim)call_data;	/* check HM */
    Xic ic = _XimICOfXICID(im, icid);
    char* proto;
    int proto_len;

    /* check validity of im/ic
     */
    if ((imid != im->private.proto.imid) || !ic) {
	return False; /* status = XimCbBadContextID; */
    }

    /* process pending callbacks
     */
    _XimProcessPendingCallbacks(ic);

    /* check if the protocol should be processed here
     */
    if (major_opcode > 82) {
	return False; /* status = XimCbBadOpcode; */
    }
    if (!callback_table[major_opcode]) {
	return False; /* status = XimCbBadOpcode; */
    }

    /* move the pointer ahead by the IM Protocol packet header size
     */
    proto = (char*)data + sz_ximPacketHeader;
    proto_len = (int)len - sz_ximPacketHeader;

    /* check if it can be processed right away
     * and if no, queue the protocol, otherwise invoke a callback
     */
    if (!_XimIsReadyForProcess(ic)) {

	/* queue the protocol
	 */
	XimPendingCallback pcb;
	char *proto_buf = (proto_len > 0) ? Xmalloc(proto_len) : NULL;

	pcb = Xmalloc(sizeof(XimPendingCallbackRec));
	if (pcb && (proto_len <= 0 || proto_buf)) {
	    if (proto_len > 0)
		memcpy(proto_buf, proto, proto_len);

	    pcb->major_opcode = major_opcode;
	    pcb->im = im;
	    pcb->ic = ic;
	    pcb->proto = proto_buf;
	    pcb->proto_len = proto_len;
	    pcb->next = (XimPendingCallback)NULL; /* queue is FIFO */
	    _XimPutCbIntoQueue(ic, pcb);
	    /* status = XimCbQueued; */
	} else {
	    /* status = XimCbError; */
	    Xfree(pcb);
	    Xfree(proto_buf);
	}
    }
    else {
	/* invoke each callback according to the major opcode.
	 * `proto' points to the next address of IM-ID and IC-ID.
	 * `proto_len' specifies the packet length.
	 */
	(void) (*callback_table[major_opcode])(im, ic, proto, proto_len);
    }
    return True;
}

static XimCbStatus
_XimGeometryCallback(Xim im,
		     Xic ic,
		     char* proto,
		     int len)
{
    XICCallback* cb = &ic->core.geometry_callback;

    /* invoke the callack
     */
    if (cb && cb->callback) {
	(*cb->callback)((XIC)ic, cb->client_data, (XPointer)NULL);
    }
    else {

	/* no callback registered
	 */
	return XimCbNoCallback;
    }

    return XimCbSuccess;
}

static XimCbStatus
_XimStrConversionCallback(Xim im,
			  Xic ic,
			  char* proto,
			  int len)
{
    XICCallback* cb = &ic->core.string_conversion_callback; /* check HM */
    XIMStringConversionCallbackStruct cbrec;

    /* invoke the callback
     */
    if (cb && cb->callback) {
	int p = XIM_HEADER_SIZE;
	cbrec.position = (XIMStringConversionPosition)
	    *(CARD32*)&proto[p]; p += sz_CARD32;
	cbrec.direction = (XIMCaretDirection)
	    *(CARD32*)&proto[p]; p += sz_CARD32;
	cbrec.operation = (XIMStringConversionOperation)
	    *(CARD32*)&proto[p]; p += sz_CARD32;
	cbrec.factor = (unsigned short)
	    *(CARD32*)&proto[p];

	(*cb->callback)((XIC)ic, cb->client_data, (XPointer)&cbrec);
    }
    else {

	/* no callback registered
	 */
	_XimError(im, ic,
		  (CARD16)XIM_BadSomething,
		  (INT16)len,
		  (CARD16)XIM_STR_CONVERSION,
		  (char*)proto); /* send XIM_ERROR */
	return XimCbNoCallback;
    }

    /* send a reply
     */
    {
	CARD8	*buf;
	INT16	 buf_len;
	int	 p, length_in_bytes, i;

	/* Assumption:
	 * `cbrec.text->length' means the string length in characters
	 */
	{
	    length_in_bytes = (cbrec.text->encoding_is_wchar)?
		sizeof(wchar_t) * cbrec.text->length: /* wchar */
		strlen(cbrec.text->string.mbs);	/* mb */
	    buf_len = XIM_HEADER_SIZE +
		sz_CARD16 +
		2 + length_in_bytes +
		XIM_PAD(2 + length_in_bytes) +
		2 + 2 + sz_CARD32 * cbrec.text->length;
	    buf = Xmalloc(buf_len);
	}
	_XimSetHeader((XPointer)buf, XIM_STR_CONVERSION_REPLY, 0, &buf_len);
	buf_len -= XIM_HEADER_SIZE; /* added by _XimSetHeader (HACK) */
	p = XIM_HEADER_SIZE;
	*(CARD16*)&buf[p] = (CARD16)im->private.proto.imid; p += sz_CARD16;
	*(CARD16*)&buf[p] = (CARD16)ic->private.proto.icid; p += sz_CARD16;
	*(CARD16*)&buf[p] = (CARD16)cbrec.text->length; p += sz_CARD16;
	memcpy(&buf[p],&cbrec.text->string.mbs,length_in_bytes);
	p += length_in_bytes;
	*(CARD16*)&buf[p] = (CARD16)(sz_CARD32*cbrec.text->length);
	p += XIM_PAD(2);
	for (i = 0; i < (int)cbrec.text->length; i++) {
	    *(CARD32*)&buf[p] = (CARD32)cbrec.text->feedback[i];
	    p += sz_CARD32;
	}

	if (!(_XimWriteData(im, buf_len, buf))) {
	    return XimCbError;
	}
	_XimFlushData(im);

	Xfree(buf);
    }

    return XimCbSuccess;
}

static XimCbStatus
_XimPreeditStartCallback(Xim im,
			 Xic ic,
			 char* proto,
			 int len)
{
    XICCallback* cb = &ic->core.preedit_attr.start_callback;
    int ret;

    /* invoke the callback
     */
    if (cb && cb->callback){
	ret = (*(cb->callback))((XIC)ic, cb->client_data, (XPointer)NULL);
    }
    else {

	/* no callback registered
	 */
	_XimError(im, ic,
		  (CARD16)XIM_BadSomething,
		  (INT16)len,
		  (CARD16)XIM_PREEDIT_START,
		  (char*)proto); /* send XIM_ERROR */
	return XimCbNoCallback;
    }

    /* send a reply
     */
    {
	CARD32 buf32[(sz_ximPacketHeader + sz_ximPreeditStartReply) / 4];
	CARD8 *buf = (CARD8 *)buf32;
	INT16 buf_len = sz_XIMID + sz_XICID + sz_ximPreeditStartReply;
	int p;

	_XimSetHeader((XPointer)buf, XIM_PREEDIT_START_REPLY, 0, &buf_len);
	p = XIM_HEADER_SIZE;
	*(CARD16*)&buf[p] = (CARD16)im->private.proto.imid; p += sz_CARD16;
	*(CARD16*)&buf[p] = (CARD16)ic->private.proto.icid; p += sz_CARD16;
	*(INT32*)&buf[p]  = (INT32)ret;

	if (!(_XimWriteData(im, buf_len, buf))) {
	    return XimCbError;
	}
	_XimFlushData(im);
    }

    return XimCbSuccess;
}

static XimCbStatus
_XimPreeditDoneCallback(Xim im,
			Xic ic,
			char* proto,
			int len)
{
    XICCallback* cb = &ic->core.preedit_attr.done_callback;

    /* invoke the callback
     */
    if (cb && cb->callback) {
	(*cb->callback)((XIC)ic, cb->client_data, (XPointer)NULL);
    }
    else {

	/* no callback registered
	 */
	return XimCbNoCallback;
    }

    return XimCbSuccess;
}

static void
_read_text_from_packet(Xim im,
		       char* buf,
		       XIMText** text_ptr)
{
    int status;
    XIMText* text;
    int tmp_len;
    char* tmp_buf;
    Status s = 0;

    status = (int)*(BITMASK32*)buf; buf += sz_BITMASK32;

    /* string part
     */
    if (status & 0x00000001) /* "no string" bit on */ {
	buf += sz_CARD16;	/* skip "length of preedit string" */
	buf += 2;		/* pad */
	*text_ptr = (XIMText*)NULL;
	return;
    }

    *text_ptr = text = Xmalloc(sizeof(XIMText));
    if (text == (XIMText*)NULL) return;

	tmp_len = (int)*(CARD16*)buf;
	buf += sz_CARD16;
	if ((tmp_buf = Xmalloc(tmp_len + 1))) {
	    memcpy(tmp_buf, buf, tmp_len);
	    tmp_buf[tmp_len] = '\0';

	    text->encoding_is_wchar = False;
	    text->length = im->methods->ctstombs((XIM)im,
					tmp_buf, tmp_len,
					NULL, 0, &s); /* CT? HM */
	    if (s != XLookupNone) {
#ifndef NO_DEC_I18N_FIX
                /* Allow for NULL-terminated */
                if ((text->string.multi_byte = Xmalloc(text->length *
                      XLC_PUBLIC(im->core.lcd,mb_cur_max) + 1))) {
#else
		if (text->string.multi_byte = Xmalloc(text->length+1)) {
#endif
			int tmp;
#ifndef NO_DEC_I18N_FIX
                        char *char_tmp;
                        int char_len;
#endif
			tmp = im->methods->ctstombs((XIM)im,
					   tmp_buf, tmp_len,
#ifndef NO_DEC_I18N_FIX
                                           text->string.multi_byte,
                                           text->length * XLC_PUBLIC(im->core.lcd,mb_cur_max) + 1,
#else
					   text->string.multi_byte, text->length,
#endif
					   &s);
			text->string.multi_byte[tmp] = '\0';
#ifndef NO_DEC_I18N_FIX
                        text->length = 0;
                        char_tmp =  text->string.multi_byte;
                        while (*char_tmp != '\0') {
                              char_len = mblen(char_tmp, strlen(char_tmp));
                              char_tmp = char_tmp + char_len;
                              (text->length)++;
                        }
#endif
		}
	    }
	    else {
		text->length = 0;
		text->string.multi_byte = NULL;
	    }

	    Xfree(tmp_buf);
	}
	buf += tmp_len;

	buf += XIM_PAD(sz_CARD16 + tmp_len); /* pad */

    /* feedback part
     */
    if (status & 0x00000002) /* "no feedback" bit on */ {
	text->feedback = (XIMFeedback*)NULL;
    }
    else {
	int i, j;

	i = (int)*(CARD16*)buf; buf += sz_CARD16;
	buf += sz_CARD16; /* skip `unused' */
	text->feedback = Xmalloc(i*(sizeof(XIMFeedback)/sizeof(CARD32)));
	j = 0;
	while (i > 0) {
	    text->feedback[j] = (XIMFeedback)*(CARD32*)buf;
	    buf += sz_CARD32;
	    i -= sz_CARD32;
	    j++;
	}
	/*
	 * text->length tells how long both the status string and
	 * the feedback array are. If there's "no string" the
	 * text->length was set to zero previously. See above.
	 * But if there is feedback (i.e. not "no feedback") then
	 * we need to convey the length of the feedback array.
	 * It might have been better if the protocol sent two
	 * different values, one for the length of the status
	 * string and one for the length of the feedback array.
	 */
	if (status & 0x00000001) /* "no string" bit on */ {
	    text->length = j;
	}
    }
}

static void
_free_memory_for_text(XIMText* text)
{
    if (text) {
        Xfree(text->string.multi_byte);
        Xfree(text->feedback);
	Xfree(text);
    }
}

static XimCbStatus
_XimPreeditDrawCallback(Xim im,
			Xic ic,
			char* proto,
			int len)
{
    XICCallback* cb = &ic->core.preedit_attr.draw_callback;
    XIMPreeditDrawCallbackStruct cbs;

    /* invoke the callback
     */
    if (cb && cb->callback) {
	cbs.caret      = (int)*(INT32*)proto; proto += sz_INT32;
	cbs.chg_first  = (int)*(INT32*)proto; proto += sz_INT32;
	cbs.chg_length = (int)*(INT32*)proto; proto += sz_INT32;
	_read_text_from_packet(im, proto, &cbs.text);

	(*cb->callback)((XIC)ic, cb->client_data, (XPointer)&cbs);

	_free_memory_for_text((XIMText*)cbs.text);
    }
    else {

	/* no callback registered
	 */
	return XimCbNoCallback;
    }

    return XimCbSuccess;
}

static XimCbStatus
_XimPreeditCaretCallback(Xim im,
			 Xic ic,
			 char* proto,
			 int len)
{
    XICCallback* cb = &ic->core.preedit_attr.caret_callback;
    XIMPreeditCaretCallbackStruct cbs;

    /* invoke the callback
     */
    if (cb && cb->callback) {
	cbs.position  = (int)*(INT32*)proto; proto += sz_INT32;
	cbs.direction = (XIMCaretDirection)*(CARD32*)proto; proto += sz_CARD32;
	cbs.style     = (XIMCaretStyle)*(CARD32*)proto; proto += sz_CARD32;

	(*cb->callback)((XIC)ic, cb->client_data, (XPointer)&cbs);
    }
    else {

	/* no callback registered
	 */
	_XimError(im, ic,
		  (CARD16)XIM_BadSomething,
		  (INT16)len,
		  (CARD16)XIM_PREEDIT_CARET,
		  (char*)proto); /* send XIM_ERROR */
	return XimCbNoCallback;
    }

    /* Send a reply
     */
    {
	CARD8 buf[sz_ximPacketHeader + sz_ximPreeditCaretReply];
	INT16 len = sz_XIMID + sz_XICID + sz_ximPreeditCaretReply;
	int p;

	_XimSetHeader((XPointer)buf, XIM_PREEDIT_CARET_REPLY, 0, &len);
	p = XIM_HEADER_SIZE;
	*(CARD16*)&buf[p] = (CARD16)im->private.proto.imid; p += sz_CARD16;
	*(CARD16*)&buf[p] = (CARD16)ic->private.proto.icid; p += sz_CARD16;
	*(CARD32*)&buf[p] = (CARD32)cbs.position;

	if (!(_XimWriteData(im, len, buf))) {
	    return XimCbError;
	}
	_XimFlushData(im);
    }

    return XimCbSuccess;
}

static XimCbStatus
_XimStatusStartCallback(Xim im,
			Xic ic,
			char* proto,
			int len)
{
    XICCallback* cb = &ic->core.status_attr.start_callback;

    /* invoke the callback
     */
    if (cb && cb->callback) {
	(*cb->callback)((XIC)ic, cb->client_data, (XPointer)NULL);
    }
    else {

	/* no callback registered
	 */
	return XimCbNoCallback;
    }

    return XimCbSuccess;
}

static XimCbStatus
_XimStatusDoneCallback(Xim im,
		       Xic ic,
		       char* proto,
		       int len)
{
    XICCallback* cb = &ic->core.status_attr.done_callback;

    /* invoke the callback
     */
    if (cb && cb->callback) {
	(*cb->callback)((XIC)ic, cb->client_data, (XPointer)NULL);
    }
    else {

	/* no callback registered
	 */
	return XimCbNoCallback;
    }

    return XimCbSuccess;
}

static XimCbStatus
_XimStatusDrawCallback(Xim im,
		       Xic ic,
		       char* proto,
		       int len)
{
    XICCallback* cb = &ic->core.status_attr.draw_callback;
    XIMStatusDrawCallbackStruct cbs;

    /* invoke the callback
     */
    if (cb && cb->callback) {
	cbs.type = (XIMStatusDataType)*(CARD32*)proto; proto += sz_CARD32;
	if (cbs.type == XIMTextType) {
	    _read_text_from_packet(im, proto, &cbs.data.text);
	}
	else if (cbs.type == XIMBitmapType) {
	    cbs.data.bitmap = (Pixmap)*(CARD32*)proto;
	}

	(*cb->callback)((XIC)ic, cb->client_data, (XPointer)&cbs);

	if (cbs.type == XIMTextType)
	    _free_memory_for_text((XIMText *)cbs.data.text);
    }
    else {

	/* no callback registered
	 */
	return XimCbNoCallback;
    }

    return XimCbSuccess;
}

static XimCbStatus
_XimPreeditStateNotifyCallback( Xim im, Xic ic, char* proto, int len )
{
    XICCallback	*cb = &ic->core.preedit_attr.state_notify_callback;

    /* invoke the callack
     */
    if( cb  &&  cb->callback ) {
	XIMPreeditStateNotifyCallbackStruct cbrec;

	cbrec.state = *(BITMASK32 *)proto;
	(*cb->callback)( (XIC)ic, cb->client_data, (XPointer)&cbrec );
    }
    else {
	/* no callback registered
	 */
	return XimCbNoCallback;
    }

    return XimCbSuccess;
}