aboutsummaryrefslogtreecommitdiff
path: root/gdb/tui/tuiRegs.c
blob: 61b933444dad9f5ad305df794a38d3408b4fcedd (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
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
/* TUI display registers in window.

   Copyright 1998, 1999, 2000, 2001, 2002 Free Software Foundation,
   Inc.

   Contributed by Hewlett-Packard Company.

   This file is part of GDB.

   This program 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 2 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/* FIXME: cagney/2002-02-28: The GDB coding standard indicates that
   "defs.h" should be included first.  Unfortunatly some systems
   (currently Debian GNU/Linux) include the <stdbool.h> via <curses.h>
   and they clash with "bfd.h"'s definiton of true/false.  The correct
   fix is to remove true/false from "bfd.h", however, until that
   happens, hack around it by including "config.h" and <curses.h>
   first.  */

#include "config.h"
#ifdef HAVE_NCURSES_H       
#include <ncurses.h>
#else
#ifdef HAVE_CURSES_H
#include <curses.h>
#endif
#endif

#include "defs.h"
#include "tui.h"
#include "tuiData.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "gdbcmd.h"
#include "frame.h"
#include "regcache.h"
#include "inferior.h"
#include "target.h"
#include "tuiLayout.h"
#include "tuiWin.h"
#include "tuiDataWin.h"
#include "tuiGeneralWin.h"
#include "tui-file.h"

/*****************************************
** LOCAL DEFINITIONS                    **
******************************************/
#define DOUBLE_FLOAT_LABEL_WIDTH    6
#define DOUBLE_FLOAT_LABEL_FMT      "%6.6s: "
#define DOUBLE_FLOAT_VALUE_WIDTH    30	/*min of 16 but may be in sci notation */

#define SINGLE_FLOAT_LABEL_WIDTH    6
#define SINGLE_FLOAT_LABEL_FMT      "%6.6s: "
#define SINGLE_FLOAT_VALUE_WIDTH    25	/* min of 8 but may be in sci notation */

#define SINGLE_LABEL_WIDTH    16
#define SINGLE_LABEL_FMT      "%10.10s: "
#define SINGLE_VALUE_WIDTH    20 /* minimum of 8 but may be in sci notation */

/* In the code HP gave Cygnus, this was actually a function call to a
   PA-specific function, which was supposed to determine whether the
   target was a 64-bit or 32-bit processor.  However, the 64-bit
   support wasn't complete, so we didn't merge that in, so we leave
   this here as a stub.  */
#define IS_64BIT 0

/*****************************************
** STATIC DATA                          **
******************************************/


/*****************************************
** STATIC LOCAL FUNCTIONS FORWARD DECLS    **
******************************************/
static TuiStatus _tuiSetRegsContent
  (int, int, struct frame_info *, TuiRegisterDisplayType, int);
static const char *_tuiRegisterName (int);
static TuiStatus _tuiGetRegisterRawValue (int, char *, struct frame_info *);
static void _tuiSetRegisterElement
  (int, struct frame_info *, TuiDataElementPtr, int);
static void _tuiDisplayRegister (int, TuiGenWinInfoPtr, enum precision_type);
static void _tuiRegisterFormat
  (char *, int, int, TuiDataElementPtr, enum precision_type);
static TuiStatus _tuiSetGeneralRegsContent (int);
static TuiStatus _tuiSetSpecialRegsContent (int);
static TuiStatus _tuiSetGeneralAndSpecialRegsContent (int);
static TuiStatus _tuiSetFloatRegsContent (TuiRegisterDisplayType, int);
static int _tuiRegValueHasChanged
  (TuiDataElementPtr, struct frame_info *, char *);
static void _tuiShowFloat_command (char *, int);
static void _tuiShowGeneral_command (char *, int);
static void _tuiShowSpecial_command (char *, int);
static void _tui_vShowRegisters_commandSupport (TuiRegisterDisplayType);
static void _tuiToggleFloatRegs_command (char *, int);
static void _tuiScrollRegsForward_command (char *, int);
static void _tuiScrollRegsBackward_command (char *, int);



/*****************************************
** PUBLIC FUNCTIONS                     **
******************************************/

/*
   ** tuiLastRegsLineNo()
   **        Answer the number of the last line in the regs display.
   **        If there are no registers (-1) is returned.
 */
int
tuiLastRegsLineNo (void)
{
  register int numLines = (-1);

  if (dataWin->detail.dataDisplayInfo.regsContentCount > 0)
    {
      numLines = (dataWin->detail.dataDisplayInfo.regsContentCount /
		  dataWin->detail.dataDisplayInfo.regsColumnCount);
      if (dataWin->detail.dataDisplayInfo.regsContentCount %
	  dataWin->detail.dataDisplayInfo.regsColumnCount)
	numLines++;
    }
  return numLines;
}				/* tuiLastRegsLineNo */


/*
   ** tuiLineFromRegElementNo()
   **        Answer the line number that the register element at elementNo is
   **        on.  If elementNo is greater than the number of register elements
   **        there are, -1 is returned.
 */
int
tuiLineFromRegElementNo (int elementNo)
{
  if (elementNo < dataWin->detail.dataDisplayInfo.regsContentCount)
    {
      int i, line = (-1);

      i = 1;
      while (line == (-1))
	{
	  if (elementNo <
	      (dataWin->detail.dataDisplayInfo.regsColumnCount * i))
	    line = i - 1;
	  else
	    i++;
	}

      return line;
    }
  else
    return (-1);
}				/* tuiLineFromRegElementNo */


/*
   ** tuiFirstRegElementNoInLine()
   **        Answer the index of the first element in lineNo.  If lineNo is
   **        past the register area (-1) is returned.
 */
int
tuiFirstRegElementNoInLine (int lineNo)
{
  if ((lineNo * dataWin->detail.dataDisplayInfo.regsColumnCount)
      <= dataWin->detail.dataDisplayInfo.regsContentCount)
    return ((lineNo + 1) *
	    dataWin->detail.dataDisplayInfo.regsColumnCount) -
      dataWin->detail.dataDisplayInfo.regsColumnCount;
  else
    return (-1);
}				/* tuiFirstRegElementNoInLine */


/*
   ** tuiLastRegElementNoInLine()
   **        Answer the index of the last element in lineNo.  If lineNo is past
   **        the register area (-1) is returned.
 */
int
tuiLastRegElementNoInLine (int lineNo)
{
  if ((lineNo * dataWin->detail.dataDisplayInfo.regsColumnCount) <=
      dataWin->detail.dataDisplayInfo.regsContentCount)
    return ((lineNo + 1) *
	    dataWin->detail.dataDisplayInfo.regsColumnCount) - 1;
  else
    return (-1);
}				/* tuiLastRegElementNoInLine */


/*
   ** tuiCalculateRegsColumnCount
   **        Calculate the number of columns that should be used to display
   **        the registers.
 */
int
tuiCalculateRegsColumnCount (TuiRegisterDisplayType dpyType)
{
  int colCount, colWidth;

  if (IS_64BIT || dpyType == TUI_DFLOAT_REGS)
    colWidth = DOUBLE_FLOAT_VALUE_WIDTH + DOUBLE_FLOAT_LABEL_WIDTH;
  else
    {
      if (dpyType == TUI_SFLOAT_REGS)
	colWidth = SINGLE_FLOAT_VALUE_WIDTH + SINGLE_FLOAT_LABEL_WIDTH;
      else
	colWidth = SINGLE_VALUE_WIDTH + SINGLE_LABEL_WIDTH;
    }
  colCount = (dataWin->generic.width - 2) / colWidth;

  return colCount;
}				/* tuiCalulateRegsColumnCount */


/*
   ** tuiShowRegisters().
   **        Show the registers int the data window as indicated by dpyType.
   **        If there is any other registers being displayed, then they are
   **        cleared.  What registers are displayed is dependent upon dpyType.
 */
void
tuiShowRegisters (TuiRegisterDisplayType dpyType)
{
  TuiStatus ret = TUI_FAILURE;
  int refreshValuesOnly = FALSE;

  /* Say that registers should be displayed, even if there is a problem */
  dataWin->detail.dataDisplayInfo.displayRegs = TRUE;

  if (target_has_registers)
    {
      refreshValuesOnly =
	(dpyType == dataWin->detail.dataDisplayInfo.regsDisplayType);
      switch (dpyType)
	{
	case TUI_GENERAL_REGS:
	  ret = _tuiSetGeneralRegsContent (refreshValuesOnly);
	  break;
	case TUI_SFLOAT_REGS:
	case TUI_DFLOAT_REGS:
	  ret = _tuiSetFloatRegsContent (dpyType, refreshValuesOnly);
	  break;

/* could ifdef out */

	case TUI_SPECIAL_REGS:
	  ret = _tuiSetSpecialRegsContent (refreshValuesOnly);
	  break;
	case TUI_GENERAL_AND_SPECIAL_REGS:
	  ret = _tuiSetGeneralAndSpecialRegsContent (refreshValuesOnly);
	  break;

/* end of potential if def */

	default:
	  break;
	}
    }
  if (ret == TUI_FAILURE)
    {
      dataWin->detail.dataDisplayInfo.regsDisplayType = TUI_UNDEFINED_REGS;
      tuiEraseDataContent (NO_REGS_STRING);
    }
  else
    {
      int i;

      /* Clear all notation of changed values */
      for (i = 0; (i < dataWin->detail.dataDisplayInfo.regsContentCount); i++)
	{
	  TuiGenWinInfoPtr dataItemWin;

	  dataItemWin = &dataWin->detail.dataDisplayInfo.
	    regsContent[i]->whichElement.dataWindow;
	  (&((TuiWinElementPtr)
	     dataItemWin->content[0])->whichElement.data)->highlight = FALSE;
	}
      dataWin->detail.dataDisplayInfo.regsDisplayType = dpyType;
      tuiDisplayAllData ();
    }
  (tuiLayoutDef ())->regsDisplayType = dpyType;

  return;
}				/* tuiShowRegisters */


/*
   ** tuiDisplayRegistersFrom().
   **        Function to display the registers in the content from
   **        'startElementNo' until the end of the register content or the
   **        end of the display height.  No checking for displaying past
   **        the end of the registers is done here.
 */
void
tuiDisplayRegistersFrom (int startElementNo)
{
  if (dataWin->detail.dataDisplayInfo.regsContent != (TuiWinContent) NULL &&
      dataWin->detail.dataDisplayInfo.regsContentCount > 0)
    {
      register int i = startElementNo;
      int j, valueCharsWide, itemWinWidth, curY, labelWidth;
      enum precision_type precision;

      precision = (dataWin->detail.dataDisplayInfo.regsDisplayType
		   == TUI_DFLOAT_REGS) ?
	double_precision : unspecified_precision;
      if (IS_64BIT ||
	  dataWin->detail.dataDisplayInfo.regsDisplayType == TUI_DFLOAT_REGS)
	{
	  valueCharsWide = DOUBLE_FLOAT_VALUE_WIDTH;
	  labelWidth = DOUBLE_FLOAT_LABEL_WIDTH;
	}
      else
	{
	  if (dataWin->detail.dataDisplayInfo.regsDisplayType ==
	      TUI_SFLOAT_REGS)
	    {
	      valueCharsWide = SINGLE_FLOAT_VALUE_WIDTH;
	      labelWidth = SINGLE_FLOAT_LABEL_WIDTH;
	    }
	  else
	    {
	      valueCharsWide = SINGLE_VALUE_WIDTH;
	      labelWidth = SINGLE_LABEL_WIDTH;
	    }
	}
      itemWinWidth = valueCharsWide + labelWidth;
      /*
         ** Now create each data "sub" window, and write the display into it.
       */
      curY = 1;
      while (i < dataWin->detail.dataDisplayInfo.regsContentCount &&
	     curY <= dataWin->generic.viewportHeight)
	{
	  for (j = 0;
	       (j < dataWin->detail.dataDisplayInfo.regsColumnCount &&
		i < dataWin->detail.dataDisplayInfo.regsContentCount); j++)
	    {
	      TuiGenWinInfoPtr dataItemWin;
	      TuiDataElementPtr dataElementPtr;

	      /* create the window if necessary */
	      dataItemWin = &dataWin->detail.dataDisplayInfo.
		regsContent[i]->whichElement.dataWindow;
	      dataElementPtr = &((TuiWinElementPtr)
				 dataItemWin->content[0])->whichElement.data;
	      if (dataItemWin->handle == (WINDOW *) NULL)
		{
		  dataItemWin->height = 1;
		  dataItemWin->width = (precision == double_precision) ?
		    itemWinWidth + 2 : itemWinWidth + 1;
		  dataItemWin->origin.x = (itemWinWidth * j) + 1;
		  dataItemWin->origin.y = curY;
		  makeWindow (dataItemWin, DONT_BOX_WINDOW);
                  scrollok (dataItemWin->handle, FALSE);
		}
              touchwin (dataItemWin->handle);

	      /*
	         ** Get the printable representation of the register
	         ** and display it
	       */
	      _tuiDisplayRegister (
			    dataElementPtr->itemNo, dataItemWin, precision);
	      i++;		/* next register */
	    }
	  curY++;		/* next row; */
	}
    }

  return;
}				/* tuiDisplayRegistersFrom */


/*
   ** tuiDisplayRegElementAtLine().
   **        Function to display the registers in the content from
   **        'startElementNo' on 'startLineNo' until the end of the
   **        register content or the end of the display height.
   **        This function checks that we won't display off the end
   **        of the register display.
 */
void
tuiDisplayRegElementAtLine (int startElementNo, int startLineNo)
{
  if (dataWin->detail.dataDisplayInfo.regsContent != (TuiWinContent) NULL &&
      dataWin->detail.dataDisplayInfo.regsContentCount > 0)
    {
      register int elementNo = startElementNo;

      if (startElementNo != 0 && startLineNo != 0)
	{
	  register int lastLineNo, firstLineOnLastPage;

	  lastLineNo = tuiLastRegsLineNo ();
	  firstLineOnLastPage = lastLineNo - (dataWin->generic.height - 2);
	  if (firstLineOnLastPage < 0)
	    firstLineOnLastPage = 0;
	  /*
	     ** If there is no other data displayed except registers,
	     ** and the elementNo causes us to scroll past the end of the
	     ** registers, adjust what element to really start the display at.
	   */
	  if (dataWin->detail.dataDisplayInfo.dataContentCount <= 0 &&
	      startLineNo > firstLineOnLastPage)
	    elementNo = tuiFirstRegElementNoInLine (firstLineOnLastPage);
	}
      tuiDisplayRegistersFrom (elementNo);
    }

  return;
}				/* tuiDisplayRegElementAtLine */



/*
   ** tuiDisplayRegistersFromLine().
   **        Function to display the registers starting at line lineNo in
   **        the data window.  Answers the line number that the display
   **        actually started from.  If nothing is displayed (-1) is returned.
 */
int
tuiDisplayRegistersFromLine (int lineNo, int forceDisplay)
{
  if (dataWin->detail.dataDisplayInfo.regsContentCount > 0)
    {
      int line, elementNo;

      if (lineNo < 0)
	line = 0;
      else if (forceDisplay)
	{			/*
				   ** If we must display regs (forceDisplay is true), then make
				   ** sure that we don't display off the end of the registers.
				 */
	  if (lineNo >= tuiLastRegsLineNo ())
	    {
	      if ((line = tuiLineFromRegElementNo (
		 dataWin->detail.dataDisplayInfo.regsContentCount - 1)) < 0)
		line = 0;
	    }
	  else
	    line = lineNo;
	}
      else
	line = lineNo;

      elementNo = tuiFirstRegElementNoInLine (line);
      if (elementNo < dataWin->detail.dataDisplayInfo.regsContentCount)
	tuiDisplayRegElementAtLine (elementNo, line);
      else
	line = (-1);

      return line;
    }

  return (-1);			/* nothing was displayed */
}				/* tuiDisplayRegistersFromLine */


/*
   ** tuiCheckRegisterValues()
   **        This function check all displayed registers for changes in
   **        values, given a particular frame.  If the values have changed,
   **        they are updated with the new value and highlighted.
 */
void
tuiCheckRegisterValues (struct frame_info *frame)
{
  if (m_winPtrNotNull (dataWin) && dataWin->generic.isVisible)
    {
      if (dataWin->detail.dataDisplayInfo.regsContentCount <= 0 &&
	  dataWin->detail.dataDisplayInfo.displayRegs)
	tuiShowRegisters ((tuiLayoutDef ())->regsDisplayType);
      else
	{
	  int i, j;
	  char rawBuf[MAX_REGISTER_SIZE];

	  for (i = 0;
	       (i < dataWin->detail.dataDisplayInfo.regsContentCount); i++)
	    {
	      TuiDataElementPtr dataElementPtr;
	      TuiGenWinInfoPtr dataItemWinPtr;
	      int wasHilighted;

	      dataItemWinPtr = &dataWin->detail.dataDisplayInfo.
		regsContent[i]->whichElement.dataWindow;
	      dataElementPtr = &((TuiWinElementPtr)
			     dataItemWinPtr->content[0])->whichElement.data;
	      wasHilighted = dataElementPtr->highlight;
	      dataElementPtr->highlight =
		_tuiRegValueHasChanged (dataElementPtr, frame, &rawBuf[0]);
	      if (dataElementPtr->highlight)
		{
                  int size;

                  size = REGISTER_RAW_SIZE (dataElementPtr->itemNo);
		  for (j = 0; j < size; j++)
		    ((char *) dataElementPtr->value)[j] = rawBuf[j];
		  _tuiDisplayRegister (
					dataElementPtr->itemNo,
					dataItemWinPtr,
			((dataWin->detail.dataDisplayInfo.regsDisplayType ==
			  TUI_DFLOAT_REGS) ?
			 double_precision : unspecified_precision));
		}
	      else if (wasHilighted)
		{
		  dataElementPtr->highlight = FALSE;
		  _tuiDisplayRegister (
					dataElementPtr->itemNo,
					dataItemWinPtr,
			((dataWin->detail.dataDisplayInfo.regsDisplayType ==
			  TUI_DFLOAT_REGS) ?
			 double_precision : unspecified_precision));
		}
	    }
	}
    }
  return;
}				/* tuiCheckRegisterValues */


/*
   ** tuiToggleFloatRegs().
 */
void
tuiToggleFloatRegs (void)
{
  TuiLayoutDefPtr layoutDef = tuiLayoutDef ();

  if (layoutDef->floatRegsDisplayType == TUI_SFLOAT_REGS)
    layoutDef->floatRegsDisplayType = TUI_DFLOAT_REGS;
  else
    layoutDef->floatRegsDisplayType = TUI_SFLOAT_REGS;

  if (m_winPtrNotNull (dataWin) && dataWin->generic.isVisible &&
      (dataWin->detail.dataDisplayInfo.regsDisplayType == TUI_SFLOAT_REGS ||
       dataWin->detail.dataDisplayInfo.regsDisplayType == TUI_DFLOAT_REGS))
    tuiShowRegisters (layoutDef->floatRegsDisplayType);

  return;
}				/* tuiToggleFloatRegs */


void
_initialize_tuiRegs (void)
{
  if (xdb_commands)
    {
      add_com ("fr", class_tui, _tuiShowFloat_command,
	       "Display only floating point registers\n");
      add_com ("gr", class_tui, _tuiShowGeneral_command,
	       "Display only general registers\n");
      add_com ("sr", class_tui, _tuiShowSpecial_command,
	       "Display only special registers\n");
      add_com ("+r", class_tui, _tuiScrollRegsForward_command,
	       "Scroll the registers window forward\n");
      add_com ("-r", class_tui, _tuiScrollRegsBackward_command,
	       "Scroll the register window backward\n");
      add_com ("tf", class_tui, _tuiToggleFloatRegs_command,
	       "Toggle between single and double precision floating point registers.\n");
      add_cmd (TUI_FLOAT_REGS_NAME_LOWER,
	       class_tui,
	       _tuiToggleFloatRegs_command,
	       "Toggle between single and double precision floating point \
registers.\n",
	       &togglelist);
    }
}


/*****************************************
** STATIC LOCAL FUNCTIONS                 **
******************************************/


/*
   ** _tuiRegisterName().
   **        Return the register name.
 */
static const char *
_tuiRegisterName (int regNum)
{
  return REGISTER_NAME (regNum);
}
extern int pagination_enabled;

static void
tui_restore_gdbout (void *ui)
{
  ui_file_delete (gdb_stdout);
  gdb_stdout = (struct ui_file*) ui;
  pagination_enabled = 1;
}

/*
   ** _tuiRegisterFormat
   **        Function to format the register name and value into a buffer,
   **        suitable for printing or display
 */
static void
_tuiRegisterFormat (char *buf, int bufLen, int regNum,
                    TuiDataElementPtr dataElement,
                    enum precision_type precision)
{
  struct ui_file *stream;
  struct ui_file *old_stdout;
  const char *name;
  struct cleanup *cleanups;
  char *p;
  int pos;

  name = REGISTER_NAME (regNum);
  if (name == 0)
    {
      strcpy (buf, "");
      return;
    }
  
  pagination_enabled = 0;
  old_stdout = gdb_stdout;
  stream = tui_sfileopen (bufLen);
  gdb_stdout = stream;
  cleanups = make_cleanup (tui_restore_gdbout, (void*) old_stdout);
  gdbarch_print_registers_info (current_gdbarch, stream, deprecated_selected_frame,
                                regNum, 1);

  /* Save formatted output in the buffer.  */
  p = tui_file_get_strbuf (stream);
  pos = 0;
  while (*p && *p == *name++ && bufLen)
    {
      *buf++ = *p++;
      bufLen--;
      pos++;
    }
  while (*p == ' ')
    p++;
  while (pos < 8 && bufLen)
    {
      *buf++ = ' ';
      bufLen--;
      pos++;
    }
  strncpy (buf, p, bufLen);

  /* Remove the possible \n.  */
  p = strchr (buf, '\n');
  if (p)
    *p = 0;

  do_cleanups (cleanups);
}


#define NUM_GENERAL_REGS    32
/*
   ** _tuiSetGeneralRegsContent().
   **      Set the content of the data window to consist of the general registers.
 */
static TuiStatus
_tuiSetGeneralRegsContent (int refreshValuesOnly)
{
  return (_tuiSetRegsContent (0,
			      NUM_GENERAL_REGS - 1,
			      deprecated_selected_frame,
			      TUI_GENERAL_REGS,
			      refreshValuesOnly));

}				/* _tuiSetGeneralRegsContent */


#ifndef PCOQ_HEAD_REGNUM
#define START_SPECIAL_REGS  0
#else
#define START_SPECIAL_REGS    PCOQ_HEAD_REGNUM
#endif

/*
   ** _tuiSetSpecialRegsContent().
   **      Set the content of the data window to consist of the special registers.
 */
static TuiStatus
_tuiSetSpecialRegsContent (int refreshValuesOnly)
{
  TuiStatus ret = TUI_FAILURE;
  int endRegNum;

  endRegNum = FP0_REGNUM - 1;
  ret = _tuiSetRegsContent (START_SPECIAL_REGS,
			    endRegNum,
			    deprecated_selected_frame,
			    TUI_SPECIAL_REGS,
			    refreshValuesOnly);

  return ret;
}				/* _tuiSetSpecialRegsContent */


/*
   ** _tuiSetGeneralAndSpecialRegsContent().
   **      Set the content of the data window to consist of the special registers.
 */
static TuiStatus
_tuiSetGeneralAndSpecialRegsContent (int refreshValuesOnly)
{
  TuiStatus ret = TUI_FAILURE;
  int endRegNum = (-1);

  endRegNum = FP0_REGNUM - 1;
  ret = _tuiSetRegsContent (
	 0, endRegNum, deprecated_selected_frame, TUI_SPECIAL_REGS, refreshValuesOnly);

  return ret;
}				/* _tuiSetGeneralAndSpecialRegsContent */

/*
   ** _tuiSetFloatRegsContent().
   **        Set the content of the data window to consist of the float registers.
 */
static TuiStatus
_tuiSetFloatRegsContent (TuiRegisterDisplayType dpyType, int refreshValuesOnly)
{
  TuiStatus ret = TUI_FAILURE;
  int startRegNum;

  startRegNum = FP0_REGNUM;
  ret = _tuiSetRegsContent (startRegNum,
			    NUM_REGS - 1,
			    deprecated_selected_frame,
			    dpyType,
			    refreshValuesOnly);

  return ret;
}				/* _tuiSetFloatRegsContent */


/*
   ** _tuiRegValueHasChanged().
   **        Answer TRUE if the register's value has changed, FALSE otherwise.
   **        If TRUE, newValue is filled in with the new value.
 */
static int
_tuiRegValueHasChanged (TuiDataElementPtr dataElement,
                        struct frame_info *frame,
                        char *newValue)
{
  int hasChanged = FALSE;

  if (dataElement->itemNo != UNDEFINED_ITEM &&
      _tuiRegisterName (dataElement->itemNo) != (char *) NULL)
    {
      char rawBuf[MAX_REGISTER_SIZE];
      int i;

      if (_tuiGetRegisterRawValue (
			 dataElement->itemNo, rawBuf, frame) == TUI_SUCCESS)
	{
          int size = REGISTER_RAW_SIZE (dataElement->itemNo);
          
	  for (i = 0; (i < size && !hasChanged); i++)
	    hasChanged = (((char *) dataElement->value)[i] != rawBuf[i]);
	  if (hasChanged && newValue != (char *) NULL)
	    {
	      for (i = 0; i < size; i++)
		newValue[i] = rawBuf[i];
	    }
	}
    }
  return hasChanged;
}				/* _tuiRegValueHasChanged */



/*
   ** _tuiGetRegisterRawValue().
   **        Get the register raw value.  The raw value is returned in regValue.
 */
static TuiStatus
_tuiGetRegisterRawValue (int regNum, char *regValue, struct frame_info *frame)
{
  TuiStatus ret = TUI_FAILURE;

  if (target_has_registers)
    {
      frame_read_register (frame, regNum, regValue);
      /* NOTE: cagney/2003-03-13: This is bogus.  It is refering to
         the register cache and not the frame which could have pulled
         the register value off the stack.  */
      if (register_cached (regNum) >= 0)
	ret = TUI_SUCCESS;
    }
  return ret;
}				/* _tuiGetRegisterRawValue */



/*
   ** _tuiSetRegisterElement().
   **       Function to initialize a data element with the input and
   **       the register value.
 */
static void
_tuiSetRegisterElement (int regNum, struct frame_info *frame,
                        TuiDataElementPtr dataElement,
                        int refreshValueOnly)
{
  if (dataElement != (TuiDataElementPtr) NULL)
    {
      if (!refreshValueOnly)
	{
	  dataElement->itemNo = regNum;
	  dataElement->name = _tuiRegisterName (regNum);
	  dataElement->highlight = FALSE;
	}
      if (dataElement->value == (Opaque) NULL)
	dataElement->value = (Opaque) xmalloc (MAX_REGISTER_SIZE);
      if (dataElement->value != (Opaque) NULL)
	_tuiGetRegisterRawValue (regNum, dataElement->value, frame);
    }

  return;
}				/* _tuiSetRegisterElement */


/*
   ** _tuiSetRegsContent().
   **        Set the content of the data window to consist of the registers
   **        numbered from startRegNum to endRegNum.  Note that if
   **        refreshValuesOnly is TRUE, startRegNum and endRegNum are ignored.
 */
static TuiStatus
_tuiSetRegsContent (int startRegNum, int endRegNum,
                    struct frame_info *frame,
                    TuiRegisterDisplayType dpyType,
                    int refreshValuesOnly)
{
  TuiStatus ret = TUI_FAILURE;
  int numRegs = endRegNum - startRegNum + 1;
  int allocatedHere = FALSE;

  if (dataWin->detail.dataDisplayInfo.regsContentCount > 0 &&
      !refreshValuesOnly)
    {
      freeDataContent (dataWin->detail.dataDisplayInfo.regsContent,
		       dataWin->detail.dataDisplayInfo.regsContentCount);
      dataWin->detail.dataDisplayInfo.regsContentCount = 0;
    }
  if (dataWin->detail.dataDisplayInfo.regsContentCount <= 0)
    {
      dataWin->detail.dataDisplayInfo.regsContent =
	allocContent (numRegs, DATA_WIN);
      allocatedHere = TRUE;
    }

  if (dataWin->detail.dataDisplayInfo.regsContent != (TuiWinContent) NULL)
    {
      int i;

      if (!refreshValuesOnly || allocatedHere)
	{
	  dataWin->generic.content = (OpaquePtr) NULL;
	  dataWin->generic.contentSize = 0;
	  addContentElements (&dataWin->generic, numRegs);
	  dataWin->detail.dataDisplayInfo.regsContent =
	    (TuiWinContent) dataWin->generic.content;
	  dataWin->detail.dataDisplayInfo.regsContentCount = numRegs;
	}
      /*
         ** Now set the register names and values
       */
      for (i = startRegNum; (i <= endRegNum); i++)
	{
	  TuiGenWinInfoPtr dataItemWin;

	  dataItemWin = &dataWin->detail.dataDisplayInfo.
	    regsContent[i - startRegNum]->whichElement.dataWindow;
	  _tuiSetRegisterElement (
				   i,
				   frame,
	   &((TuiWinElementPtr) dataItemWin->content[0])->whichElement.data,
				   !allocatedHere && refreshValuesOnly);
	}
      dataWin->detail.dataDisplayInfo.regsColumnCount =
	tuiCalculateRegsColumnCount (dpyType);
#ifdef LATER
      if (dataWin->detail.dataDisplayInfo.dataContentCount > 0)
	{
	  /* delete all the windows? */
	  /* realloc content equal to dataContentCount + regsContentCount */
	  /* append dataWin->detail.dataDisplayInfo.dataContent to content */
	}
#endif
      dataWin->generic.contentSize =
	dataWin->detail.dataDisplayInfo.regsContentCount +
	dataWin->detail.dataDisplayInfo.dataContentCount;
      ret = TUI_SUCCESS;
    }

  return ret;
}				/* _tuiSetRegsContent */


/*
   ** _tuiDisplayRegister().
   **        Function to display a register in a window.  If hilite is TRUE,
   **        than the value will be displayed in reverse video
 */
static void
_tuiDisplayRegister (int regNum,
                     TuiGenWinInfoPtr winInfo,		/* the data item window */
                     enum precision_type precision)
{
  if (winInfo->handle != (WINDOW *) NULL)
    {
      int i;
      char buf[40];
      int valueCharsWide, labelWidth;
      TuiDataElementPtr dataElementPtr = &((TuiWinContent)
				    winInfo->content)[0]->whichElement.data;

      if (IS_64BIT ||
	  dataWin->detail.dataDisplayInfo.regsDisplayType == TUI_DFLOAT_REGS)
	{
	  valueCharsWide = DOUBLE_FLOAT_VALUE_WIDTH;
	  labelWidth = DOUBLE_FLOAT_LABEL_WIDTH;
	}
      else
	{
	  if (dataWin->detail.dataDisplayInfo.regsDisplayType ==
	      TUI_SFLOAT_REGS)
	    {
	      valueCharsWide = SINGLE_FLOAT_VALUE_WIDTH;
	      labelWidth = SINGLE_FLOAT_LABEL_WIDTH;
	    }
	  else
	    {
	      valueCharsWide = SINGLE_VALUE_WIDTH;
	      labelWidth = SINGLE_LABEL_WIDTH;
	    }
	}

      buf[0] = (char) 0;
      _tuiRegisterFormat (buf,
			  valueCharsWide + labelWidth,
			  regNum,
			  dataElementPtr,
			  precision);

      if (dataElementPtr->highlight)
	wstandout (winInfo->handle);

      wmove (winInfo->handle, 0, 0);
      for (i = 1; i < winInfo->width; i++)
        waddch (winInfo->handle, ' ');
      wmove (winInfo->handle, 0, 0);
      waddstr (winInfo->handle, buf);

      if (dataElementPtr->highlight)
	wstandend (winInfo->handle);
      tuiRefreshWin (winInfo);
    }
  return;
}				/* _tuiDisplayRegister */


static void
_tui_vShowRegisters_commandSupport (TuiRegisterDisplayType dpyType)
{

  if (m_winPtrNotNull (dataWin) && dataWin->generic.isVisible)
    {				/* Data window already displayed, show the registers */
      if (dataWin->detail.dataDisplayInfo.regsDisplayType != dpyType)
	tuiShowRegisters (dpyType);
    }
  else
    (tuiLayoutDef ())->regsDisplayType = dpyType;

  return;
}				/* _tui_vShowRegisters_commandSupport */


static void
_tuiShowFloat_command (char *arg, int fromTTY)
{
  if (m_winPtrIsNull (dataWin) || !dataWin->generic.isVisible ||
      (dataWin->detail.dataDisplayInfo.regsDisplayType != TUI_SFLOAT_REGS &&
       dataWin->detail.dataDisplayInfo.regsDisplayType != TUI_DFLOAT_REGS))
    _tui_vShowRegisters_commandSupport ((tuiLayoutDef ())->floatRegsDisplayType);

  return;
}				/* _tuiShowFloat_command */


static void
_tuiShowGeneral_command (char *arg, int fromTTY)
{
  _tui_vShowRegisters_commandSupport (TUI_GENERAL_REGS);
}


static void
_tuiShowSpecial_command (char *arg, int fromTTY)
{
  _tui_vShowRegisters_commandSupport (TUI_SPECIAL_REGS);
}


static void
_tuiToggleFloatRegs_command (char *arg, int fromTTY)
{
  if (m_winPtrNotNull (dataWin) && dataWin->generic.isVisible)
    tuiToggleFloatRegs ();
  else
    {
      TuiLayoutDefPtr layoutDef = tuiLayoutDef ();

      if (layoutDef->floatRegsDisplayType == TUI_SFLOAT_REGS)
	layoutDef->floatRegsDisplayType = TUI_DFLOAT_REGS;
      else
	layoutDef->floatRegsDisplayType = TUI_SFLOAT_REGS;
    }


  return;
}				/* _tuiToggleFloatRegs_command */


static void
_tuiScrollRegsForward_command (char *arg, int fromTTY)
{
  tui_scroll (FORWARD_SCROLL, dataWin, 1);
}


static void
_tuiScrollRegsBackward_command (char *arg, int fromTTY)
{
  tui_scroll (BACKWARD_SCROLL, dataWin, 1);
}