summaryrefslogtreecommitdiffstats
path: root/src/utils.c
blob: bbc8074b8300d103a6d79d1ff8f99f0607e0c2c0 (plain) (blame)
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
/*	$calcurse: utils.c,v 1.48 2008/08/11 18:08:45 culot Exp $	*/

/*
 * Calcurse - text-based organizer
 * Copyright (c) 2004-2008 Frederic Culot
 *
 * 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.
 *
 * Send your feedback or comments to : calcurse@culot.org
 * Calcurse home page : http://culot.org/calcurse
 *
 */

#include <time.h>
#include <string.h>
#include <stdlib.h>
#include <limits.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/types.h>
#include <math.h>
#include <errno.h>

#include "i18n.h"
#include "wins.h"
#include "custom.h"
#include "utils.h"

static unsigned status_page;

/* General routine to exit calcurse properly. */
void
exit_calcurse (int status)
{
  clear ();
  refresh ();
  endwin ();
  calendar_stop_date_thread ();
  exit (status);
}

/* Function to exit on internal error. */
void
ierror (const char *errmsg, ierror_sev_e sev)
{
  WINDOW *errwin;
  char *label = _("INTERNAL ERROR");
  char *exitmsg = _("calcurse will now exit...");
  char *reportmsg = _("Please report the following bug:");
  const int winrow = 10;
  const int wincol = col - 2;
  const int msglen = wincol - 2;
  char msg[msglen];

  strncpy (msg, errmsg, msglen);
  errwin = newwin (winrow, wincol, (row - winrow) / 2, (col - wincol) / 2);
  custom_apply_attr (errwin, ATTR_HIGHEST);
  box (errwin, 0, 0);
  wins_show (errwin, label);
  if (sev == IERROR_FATAL)
    mvwprintw (errwin, 3, 1, reportmsg);
  mvwprintw (errwin, 5, (wincol - strlen (msg)) / 2, "%s", msg);
  if (sev == IERROR_FATAL)
    mvwprintw (errwin, winrow - 2, wincol - strlen (exitmsg) - 1, "%s",
	       exitmsg);
  custom_remove_attr (errwin, ATTR_HIGHEST);
  wrefresh (errwin);
  wgetch (errwin);
  if (sev == IERROR_FATAL)
    exit_calcurse (EXIT_FAILURE);
}

/* Function to handle an assertion failure. */
void
aerror (const char *file, int line, const char *assertion)
{
  char errmsg[BUFSIZ];

  snprintf (errmsg, BUFSIZ,
	    "assert \"%s\" failed: file \"%s\", line %d", assertion, file,
	    line);
  ierror (errmsg, IERROR_FATAL);
}

/* 
 * Print a message in the status bar.
 * Message texts for first line and second line are to be provided.
 */
void
status_mesg (char *mesg_line1, char *mesg_line2)
{
  erase_status_bar ();
  custom_apply_attr (win[STA].p, ATTR_HIGHEST);
  mvwprintw (win[STA].p, 0, 0, mesg_line1);
  mvwprintw (win[STA].p, 1, 0, mesg_line2);
  custom_remove_attr (win[STA].p, ATTR_HIGHEST);
}

/* Erase status bar. */
void
erase_status_bar (void)
{
  erase_window_part (win[STA].p, 0, 0, col, STATUSHEIGHT);
}

/* Erase part of a window. */
void
erase_window_part (WINDOW *win, int first_col, int first_row, int last_col,
		   int last_row)
{
  int c, r;

  for (r = first_row; r <= last_row; r++)
    {
      for (c = first_col; c <= last_col; c++)
	{
	  mvwprintw (win, r, c, " ");
	}
    }
  wnoutrefresh (win);
}

/* draws a popup window */
WINDOW *
popup (int pop_row, int pop_col, int pop_y, int pop_x, char *pop_lab)
{
  char *txt_pop = _("Press any key to continue...");
  char label[BUFSIZ];
  WINDOW *popup_win;

  popup_win = newwin (pop_row, pop_col, pop_y, pop_x);
  keypad (popup_win, TRUE);
  custom_apply_attr (popup_win, ATTR_HIGHEST);
  box (popup_win, 0, 0);
  snprintf (label, BUFSIZ, "%s", pop_lab);
  wins_show (popup_win, label);
  mvwprintw (popup_win, pop_row - 2, pop_col - (strlen (txt_pop) + 1), "%s",
	     txt_pop);
  custom_remove_attr (popup_win, ATTR_HIGHEST);
  wnoutrefresh (popup_win);
  doupdate ();
  return (popup_win);
}

/* prints in middle of a panel */
void
print_in_middle (WINDOW *win, int starty, int startx, int width, char *string)
{
  int length, x, y;
  float temp;

  if (win == NULL)
    win = stdscr;
  getyx (win, y, x);
  if (startx != 0)
    x = startx;
  if (starty != 0)
    y = starty;
  if (width == 0)
    width = 80;

  length = strlen (string);
  temp = (width - length) / 2;
  x = startx + (int) temp;
  custom_apply_attr (win, ATTR_HIGHEST);
  mvwprintw (win, y, x, "%s", string);
  custom_remove_attr (win, ATTR_HIGHEST);
}

/* 
 * Draw the cursor at the correct position in string.
 * As echoing is not set, we need to know the string we are working on to 
 * handle display correctly.
 */
static void
showcursor (WINDOW *win, int y, int pos, char *str, int l, int offset)
{
  char *nc;

  nc = str + pos;
  wmove (win, y, pos - offset);
  (pos >= l) ? waddch (win, SPC | A_REVERSE) : waddch (win, *nc | A_REVERSE);
}

/* Print the string at the desired position. */
static void
showstring (WINDOW *win, int y, int x, char *str, int len, int pos)
{
  const int rec = 30, border = 3;
  const int max_col = col - border, max_len = max_col - rec;
  int page, max_page, offset, c = 0;
  char *orig;

  orig = str;
  max_page = (len - rec) / max_len;
  page = (pos - rec) / max_len;
  offset = page * max_len;
  str += offset;
  mvwaddnstr (win, y, x, str, MIN (len, max_col));
  wclrtoeol (win);
  if (page > 0 && page < max_page)
    {
      c = '*';
    }
  else if (page > 0)
    {
      c = '<';
    }
  else if (page < max_page)
    {
      c = '>';
    }
  else
    c = 0;
  mvwprintw (win, y, col - 1, "%c", c);
  showcursor (win, y, pos, orig, len, offset);
}

/* Delete a character at the given position in string. */
static void
del_char (int pos, char *str)
{
  int len;

  str += pos;
  len = strlen (str) + 1;
  memmove (str, str + 1, len);
}

/* Add a character at the given position in string. */
static char *
add_char (int pos, int ch, char *str)
{
  int len;

  str += pos;
  len = strlen (str) + 1;
  memmove (str + 1, str, len);
  *str = ch;
  return (str += len);
}

/* 
 * Getstring allows to get user input and to print it on a window,
 * even if noecho() is on. This function is also used to modify an existing
 * text (the variable string can be non-NULL).
 * We need to do the echoing manually because of the multi-threading
 * environment, otherwise the cursor would move from place to place without
 * control.
 */
int
getstring (WINDOW *win, char *str, int l, int x, int y)
{
  int ch, newpos, len = 0;
  char *orig;

  orig = str;
  custom_apply_attr (win, ATTR_HIGHEST);
  for (; *str; ++str, ++len)
    ;
  newpos = x + len;
  showstring (win, y, x, orig, len, newpos);

  while ((ch = wgetch (win)) != '\n')
    {
      switch (ch)
	{
	case KEY_BACKSPACE:	/* delete one character */
	case 330:
	case 127:
	case CTRL ('H'):
	  if (len > 0)
	    {
	      --newpos;
	      --len;
	      if (newpos >= x + len)
		--str;
	      else		/* to be deleted inside string */
		del_char (newpos, orig);
	    }
	  break;

	case CTRL ('D'):	/* delete next character */
	  if (newpos != (x + len))
	    {
	      --len;
	      if (newpos >= x + len)
		--str;
	      else
		del_char (newpos, orig);
	    }
	  else
	    printf ("\a");
	  break;

	case CTRL ('K'):	/* delete to end-of-line */
	  str = orig + newpos;
	  *str = 0;
	  len -= (len - newpos);
	  break;

	case CTRL ('A'):	/* go to begginning of string */
	  newpos = x;
	  break;

	case CTRL ('E'):	/* go to end of string */
	  newpos = x + len;
	  break;

	case KEY_LEFT:		/* move one char backward  */
	case CTRL ('B'):
	  if (newpos > x)
	    newpos--;
	  break;

	case KEY_RIGHT:	/* move one char forward */
	case CTRL ('F'):
	  if (newpos < len)
	    newpos++;
	  break;

	case ESCAPE:		/* cancel editing */
	  return (GETSTRING_ESC);
	  break;

	default:		/* insert one character */
	  if (len < l - 1)
	    {
	      if (newpos >= len)
		{
		  str = orig + newpos;
		  *str++ = ch;
		}
	      else		// char is to be inserted inside string 
		str = add_char (newpos, ch, orig);
	      ++len;
	      ++newpos;
	    }

	}
      showstring (win, y, x, orig, len, newpos);
      doupdate ();
    }
  *str = 0;
  custom_remove_attr (win, ATTR_HIGHEST);
  return (len == 0 ? GETSTRING_RET : GETSTRING_VALID);
}

/* Update an already existing string. */
int
updatestring (WINDOW *win, char **str, int x, int y)
{
  char *newstr;
  int escape, len = strlen (*str) + 1;

  newstr = (char *) malloc (BUFSIZ);
  (void) memcpy (newstr, *str, len);
  escape = getstring (win, newstr, BUFSIZ, x, y);
  if (!escape)
    {
      len = strlen (newstr) + 1;
      if ((*str = (char *) realloc (*str, len)) == NULL)
	{
	  /* NOTREACHED */
	  ierror (_("FATAL ERROR in updatestring: out of memory"),
		  IERROR_FATAL);
	}
      else
	(void) memcpy (*str, newstr, len);
    }
  free (newstr);
  return (escape);
}

/* checks if a string is only made of digits */
int
is_all_digit (char *string)
{
  int digit, i;
  int all_digit;

  digit = 0;
  all_digit = 0;

  for (i = 0; i <= strlen (string); i++)
    if (isdigit (string[i]) != 0)
      digit++;
  if (digit == strlen (string))
    all_digit = 1;
  return (all_digit);
}

/* 
 * Draws the status bar. 
 * To add a keybinding, insert a new binding_t item, add it in the *binding
 * table, and update the NB_CAL_CMDS, NB_APP_CMDS or NB_TOD_CMDS defines in
 * utils.h, depending on which panel the added keybind is assigned to.
 */
void
status_bar (void)
{
  window_e which_pan;
  int cmd_length, space_between_cmds, start, end, i, j = 0;
  const int pos[NB_PANELS + 1] =
      { 0, NB_CAL_CMDS, NB_CAL_CMDS + NB_APP_CMDS, TOTAL_CMDS };

  binding_t help = { "  ?", _("Help") };
  binding_t quit = { "  Q", _("Quit") };
  binding_t save = { "  S", _("Save") };
  binding_t export = { "  X", _("Export") };
  binding_t add = { "  A", _("Add Item") };
  binding_t del = { "  D", _("Del Item") };
  binding_t edit = { "  E", _("Edit Itm") };
  binding_t flag = { "  !", _("Flag Itm") };
  binding_t day = { "H/L", _("-+1 Day") };
  binding_t week = { "K/J", _("-+1 Week") };
  binding_t updn = { "K/J", _("Up/Down") };
  binding_t rept = { "  R", _("Repeat") };
  binding_t prio = { "+/-", _("Priority") };
  binding_t tab = { "Tab", _("Chg View") };
  binding_t togo = { "  G", _("Go to") };
  binding_t conf = { "  C", _("Config") };
  binding_t view = { "  V", _("View") };
  binding_t draw = { " ^R", _("Redraw") };
  binding_t appt = { " ^A", _("Add Appt") };
  binding_t todo = { " ^T", _("Add Todo") };
  binding_t enote = { "  N", _("EditNote") };
  binding_t vnote = { "  >", _("ViewNote") };
  binding_t eday = { "^HL", _("-+1 Day") };
  binding_t ewek = { "^KJ", _("-+1 Week") };
  binding_t othr = { "  O", _("OtherCmd") };
  binding_t today = {" ^G", _("Today") };
  binding_t weekb = {"  0", _("beg Week") };
  binding_t weeke = {"  $", _("end Week") };

  binding_t *binding[TOTAL_CMDS] = {
    /* calendar keys */
    &help, &quit, &save, &export, &day, &week, &weekb, &weeke, &tab,
    &togo, &conf, &othr, &appt, &todo, &eday, &ewek, &draw, &today, &othr,
    /* appointment keys */
    &help, &quit, &save, &export, &add, &del, &edit, &view, &rept,
    &updn, &flag, &othr, &enote, &vnote, &appt, &todo, &eday, &ewek,
    &conf, &togo, &tab, &draw, &today, &othr,
    /* todo keys */
    &help, &quit, &save, &export, &add, &del, &edit, &view, &prio,
    &updn, &tab, &othr, &enote, &vnote, &appt, &todo, &eday, &ewek,
    &conf, &togo, &draw, &today, &othr
  };

  /* Total length of a command. */
  cmd_length = KEY_LENGTH + LABEL_LENGTH;
  space_between_cmds = floor (col / CMDS_PER_LINE - cmd_length);
  cmd_length += space_between_cmds;

  /* Drawing the keybinding with attribute and label without. */
  erase_status_bar ();
  which_pan = wins_slctd ();
  start = pos[which_pan] + 2 * CMDS_PER_LINE * (status_page - 1);
  end = MIN (start + 2 * CMDS_PER_LINE, pos[which_pan + 1]);
  for (i = start; i < end; i += 2)
    {
      custom_apply_attr (win[STA].p, ATTR_HIGHEST);
      mvwprintw (win[STA].p, 0, j * cmd_length, binding[i]->key);
      if (i + 1 != end)
	mvwprintw (win[STA].p, 1, j * cmd_length, binding[i + 1]->key);
      custom_remove_attr (win[STA].p, ATTR_HIGHEST);
      mvwprintw (win[STA].p, 0, j * cmd_length + KEY_LENGTH,
		 binding[i]->label);
      if (i + 1 != end)
	mvwprintw (win[STA].p, 1, j * cmd_length + KEY_LENGTH,
		   binding[i + 1]->label);
      j++;
    }
  wnoutrefresh (win[STA].p);
}

long
date2sec (date_t day, unsigned hour, unsigned min)
{
  struct tm start, *lt;
  time_t tstart, t;

  t = time (NULL);
  lt = localtime (&t);
  start = *lt;

  start.tm_mon = day.mm;
  start.tm_mday = day.dd;
  start.tm_year = day.yyyy;
  start.tm_hour = hour;
  start.tm_min = min;
  start.tm_sec = 0;
  start.tm_isdst = -1;
  start.tm_year -= 1900;
  start.tm_mon--;
  tstart = mktime (&start);
  if (tstart == -1)
    {
      fputs (_("FATAL ERROR in date2sec: failure in mktime\n"), stderr);
      fprintf (stderr, "%u %u %u %u %u\n", day.yyyy, day.mm, day.dd,
	       hour, min);
      exit (EXIT_FAILURE);
    }

  return (tstart);
}

/* Return a string containing the hour of a given date in seconds. */
char *
date_sec2hour_str (long sec)
{
  const int TIME_LEN = 6;
  struct tm *lt;
  time_t t;
  char *timestr;

  t = sec;
  lt = localtime (&t);
  timestr = (char *) malloc (TIME_LEN);
  snprintf (timestr, TIME_LEN, "%02u:%02u", lt->tm_hour, lt->tm_min);
  return (timestr);
}

/* Return a string containing the date, given a date in seconds. */
char *
date_sec2date_str (long sec, char *datefmt)
{
  struct tm *lt;
  time_t t;
  char *datestr;

  datestr = (char *) malloc (sizeof (char) * BUFSIZ);

  if (sec == 0)
    snprintf (datestr, BUFSIZ, "0");
  else
    {
      t = sec;
      lt = localtime (&t);
      strftime (datestr, BUFSIZ, datefmt, lt);
    }

  return (datestr);
}

/* Generic function to format date. */
void
date_sec2date_fmt (long sec, const char *fmt, char *datef)
{
  struct tm *lt;
  time_t t;

  t = sec;
  lt = localtime (&t);
  strftime (datef, BUFSIZ, fmt, lt);
}

/* 
 * Used to change date by adding a certain amount of days or weeks.
 */
long
date_sec_change (long date, int delta_month, int delta_day)
{
  struct tm *lt;
  time_t t;
  
  t = date;
  lt = localtime (&t);
  lt->tm_mon += delta_month;
  lt->tm_mday += delta_day;
  t = mktime (lt);
  if (t == -1)
    {
      fputs (_("FATAL ERROR in date_sec_change: failure in mktime\n"), stderr);
      exit (EXIT_FAILURE);
    }

  return t;
}

/* 
 * Return a long containing the date which is updated taking into account
 * the new time and date entered by the user.
 */
long
update_time_in_date (long date, unsigned hr, unsigned mn)
{
  struct tm *lt;
  time_t t, new_date;

  t = date;
  lt = localtime (&t);
  lt->tm_hour = hr;
  lt->tm_min = mn;
  new_date = mktime (lt);
  ASSERT (new_date != -1);

  return (new_date);
}

/* 
 * Returns the date in seconds from year 1900.
 * If no date is entered, current date is chosen.
 */
long
get_sec_date (date_t date)
{
  struct tm *ptrtime;
  time_t timer;
  long long_date;
  char current_day[] = "dd ";
  char current_month[] = "mm ";
  char current_year[] = "yyyy ";

  if (date.yyyy == 0 && date.mm == 0 && date.dd == 0)
    {
      timer = time (NULL);
      ptrtime = localtime (&timer);
      strftime (current_day, strlen (current_day), "%d", ptrtime);
      strftime (current_month, strlen (current_month), "%m", ptrtime);
      strftime (current_year, strlen (current_year), "%Y", ptrtime);
      date.mm = atoi (current_month);
      date.dd = atoi (current_day);
      date.yyyy = atoi (current_year);
    }
  long_date = date2sec (date, 0, 0);
  return (long_date);
}

long
min2sec (unsigned minutes)
{
  return (minutes * MININSEC);
}

/* 
 * Checks if a time has a good format. 
 * The format could be either HH:MM or H:MM or MM, and we should have:
 * 0 <= HH <= 24 and 0 <= MM < 999.
 * This function returns 1 if the entered time is correct and in 
 * [h:mm] or [hh:mm] format, and 2 if the entered time is correct and entered
 * in [mm] format.
 */
int
check_time (char *string)
{
  int ok = 0;
  char hour[] = "  ";
  char minutes[] = "  ";

  if (((strlen (string) == 2) || (strlen (string) == 3))
      && (isdigit (string[0]) != 0) && (isdigit (string[1]) != 0))
    {
      strncpy (minutes, string, 2);
      if (atoi (minutes) >= 0)
	ok = 2;			/* [MM] format */
    }
  else if ((strlen (string) == 4) && (isdigit (string[0]) != 0)
	   && (isdigit (string[2]) != 0) && (isdigit (string[3]) != 0)
           && (string[1] == ':'))
    {
      strncpy (hour, string, 1);
      strncpy (minutes, string + 2, 2);
      if ((atoi (hour) <= 24) && (atoi (hour) >= 0)
	  && (atoi (minutes) < MININSEC) && (atoi (minutes) >= 0))
	ok = 1;			/* [H:MM] format */
    }
  else if ((strlen (string) == 5) && (isdigit (string[0]) != 0)
	   && (isdigit (string[1]) != 0) && (isdigit (string[3]) != 0)
	   && (isdigit (string[4]) != 0) && (string[2] == ':'))
    {
      strncpy (hour, string, 2);
      strncpy (minutes, string + 3, 2);
      if ((atoi (hour) <= 24) && (atoi (hour) >= 0)
	  && (atoi (minutes) < MININSEC) && (atoi (minutes) >= 0))
	ok = 1;			/* [HH:MM] format */
    }
  return (ok);
}

/*
 * Display a scroll bar when there are so many items that they
 * can not be displayed inside the corresponding panel.
 */
void
draw_scrollbar (WINDOW *win, int y, int x, int length,
		int bar_top, int bar_bottom, bool hilt)
{
  mvwvline (win, bar_top, x, ACS_VLINE, bar_bottom - bar_top);
  if (hilt)
    custom_apply_attr (win, ATTR_HIGHEST);
  wattron (win, A_REVERSE);
  mvwvline (win, y, x, ' ', length);
  wattroff (win, A_REVERSE);
  if (hilt)
    custom_remove_attr (win, ATTR_HIGHEST);
}

/*
 * Print an item (either an appointment, event, or todo) in a 
 * popup window. This is useful if an item description is too 
 * long to fit in its corresponding panel window.
 */
void
item_in_popup (char *saved_a_start, char *saved_a_end, char *msg,
	       char *pop_title)
{
  WINDOW *popup_win, *pad;
  const int margin_left = 4, margin_top = 4;
  const int winl = row - 5, winw = col - margin_left;
  const int padl = winl - 2, padw = winw - margin_left;

  pad = newpad (padl, padw);
  popup_win = popup (winl, winw, 1, 2, pop_title);
  if (strncmp (pop_title, _("Appointment"), 11) == 0)
    {
      mvwprintw (popup_win, margin_top, margin_left, "- %s -> %s",
		 saved_a_start, saved_a_end);
    }
  mvwprintw (pad, 0, margin_left, "%s", msg);
  wmove (win[STA].p, 0, 0);
  pnoutrefresh (pad, 0, 0, margin_top + 2, margin_left, padl, winw);
  doupdate ();
  wgetch (popup_win);
  delwin (pad);
  delwin (popup_win);
}

/* Reset the status bar page. */
void
reset_status_page (void)
{
  status_page = 1;
}

/* Update the status bar page number to display other commands. */
void
other_status_page (int panel)
{
  int nb_item = 0, max_page;
  char *error = _("FATAL ERROR in other_status_page: unknown panel\n");

  switch (panel)
    {
    case CAL:
      nb_item = NB_CAL_CMDS;
      break;
    case APP:
      nb_item = NB_APP_CMDS;
      break;
    case TOD:
      nb_item = NB_TOD_CMDS;
      break;
    default:
      ierror (error, IERROR_FATAL);
    }
  max_page = ceil (nb_item / (2 * CMDS_PER_LINE + 1)) + 1;
  if (status_page < max_page)
    status_page++;
  else
    status_page = 1;
}

/* Returns the beginning of current day in seconds from 1900. */
long
get_today (void)
{
  struct tm *lt;
  time_t current_time;
  long current_day;
  date_t day;

  current_time = time (NULL);
  lt = localtime (&current_time);
  day.mm = lt->tm_mon + 1;
  day.dd = lt->tm_mday;
  day.yyyy = lt->tm_year + 1900;
  current_day = date2sec (day, 0, 0);

  return (current_day);
}

/* Returns the current time in seconds. */
long
now (void)
{
  time_t current_time;

  current_time = time (NULL);
  return (current_time);
}

/* Copy a string */
char *
mycpy (const char *src)
{
  char *string = malloc (strlen (src) + 1);

  if (string != NULL)
    return (strncpy (string, src, strlen (src) + 1));
  else
    return (NULL);
}

long
mystrtol (const char *str)
{
  char *ep;
  long lval;
  const char *not_a_number =
    _("FATAL ERROR in mystrtol: could not convert string");
  const char *out_of_range =
    _("FATAL ERROR in mystrtol: number is out of range");

  errno = 0;
  lval = strtol (str, &ep, 10);
  if (str[0] == '\0' || *ep != '\0')
    ierror (not_a_number, IERROR_FATAL);
  if (errno == ERANGE && (lval == LONG_MAX || lval == LONG_MIN))
    ierror (out_of_range, IERROR_FATAL);

  return (lval);
}

/* Print the given option value with appropriate color. */
void
print_option_incolor (WINDOW *win, bool option, int pos_y, int pos_x)
{
  int color = 0;
  char option_value[BUFSIZ] = "";

  if (option == true)
    {
      color = ATTR_TRUE;
      strncpy (option_value, _("yes"), BUFSIZ);
    }
  else if (option == false)
    {
      color = ATTR_FALSE;
      strncpy (option_value, _("no"), BUFSIZ);
    }
  else
    {
      ierror (_("option not defined - Problem in print_option_incolor()"),
	      IERROR_FATAL);
    }
  custom_apply_attr (win, color);
  mvwprintw (win, pos_y, pos_x, "%s", option_value);
  custom_remove_attr (win, color);
  wnoutrefresh (win);
  doupdate ();
}

/* 
 * Create a new unique file, and return a newly allocated string which contains
 * the random part of the file name. 
 */
char *
new_tempfile (const char *prefix, int trailing_len)
{
  char fullname[BUFSIZ];
  int prefix_len, fd;
  FILE *file;

  if (prefix == NULL)
    return (NULL);

  prefix_len = strlen (prefix);
  if (prefix_len + trailing_len >= BUFSIZ)
    return (NULL);
  memcpy (fullname, prefix, prefix_len);
  memset (fullname + prefix_len, 'X', trailing_len);
  fullname[prefix_len + trailing_len] = '\0';
  if ((fd = mkstemp (fullname)) == -1 || (file = fdopen (fd, "w+")) == NULL)
    {
      if (fd != -1)
	{
	  unlink (fullname);
	  close (fd);
	}
      ierror (_("FATAL ERROR: temporary file could not be created!"),
	      IERROR_WARN);
      return (NULL);
    }
  fclose (file);

  return (strdup (fullname + prefix_len));
}

/* Erase a note previously attached to a todo, event or appointment. */
void
erase_note (char **note, erase_flag_e flag)
{
  char fullname[BUFSIZ];
  char *errmsg = _("FATAL ERROR in erase_note: could not remove note\n");

  if (*note == NULL)
    return;
  if (flag != ERASE_FORCE_KEEP_NOTE)
    {
      snprintf (fullname, BUFSIZ, "%s%s", path_notes, *note);
      if (unlink (fullname) != 0)
	ierror (errmsg, IERROR_FATAL);
    }
  free (*note);
  *note = NULL;
}

/*
 * Convert a string containing a date into three integers containing the year,
 * month and day.
 * Returns 1 if sucessfully converted or 0 if the string is an invalid date.
 */
int
parse_date (char *date_string, int datefmt, int *year, int *month, int *day)
{
  int in1, in2, in3;
  int lyear, lmonth, lday;
  if (date_string == NULL)
    return (0);
  if (sscanf (date_string, "%d / %d / %d", &in1, &in2, &in3) < 3)
    return (0);
  switch (datefmt)
    {
    case 1:
      lmonth = in1;
      lday = in2;
      lyear = in3;
      break;
    case 2:
      lday = in1;
      lmonth = in2;
      lyear = in3;
      break;
    case 3:
      lyear = in1;
      lmonth = in2;
      lday = in3;
      break;
    default:
      return (0);
    }
  if (lyear < 1 || lyear > 9999 || lmonth < 1 || lmonth > 12 || lday < 1
      || lday > 31)
    return (0);
  if (year != NULL)
    *year = lyear;
  if (month != NULL)
    *month = lmonth;
  if (day != NULL)
    *day = lday;
  return (1);
}