aboutsummaryrefslogtreecommitdiffstats
path: root/src/utils.c
blob: 527dec8c27ad9638416a352fa45fb98c79e06eef (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
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
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
/*
 * Calcurse - text-based organizer
 *
 * Copyright (c) 2004-2013 calcurse Development Team <misc@calcurse.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the
 *        following disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the
 *        following disclaimer in the documentation and/or other
 *        materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Send your feedback or comments to : misc@calcurse.org
 * Calcurse home page : http://calcurse.org
 *
 */

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

#include "calcurse.h"

#define ISLEAP(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)

#define FS_EXT_MAXLEN 64

enum format_specifier {
	FS_STARTDATE,
	FS_DURATION,
	FS_ENDDATE,
	FS_REMAINING,
	FS_MESSAGE,
	FS_NOTE,
	FS_NOTEFILE,
	FS_PRIORITY,
	FS_PSIGN,
	FS_EOF,
	FS_UNKNOWN
};

/* General routine to exit calcurse properly. */
void exit_calcurse(int status)
{
	int was_interactive;

	if (ui_mode == UI_CURSES) {
		notify_stop_main_thread();
		clear();
		wins_refresh();
		endwin();
		ui_mode = UI_CMDLINE;
		was_interactive = 1;
	} else {
		was_interactive = 0;
	}

	ui_calendar_stop_date_thread();
	io_stop_psave_thread();
	free_user_data();
	keys_free();
	mem_stats();
	if (was_interactive) {
		if (unlink(path_cpid) != 0)
			EXIT(_("Could not remove calcurse lock file: %s\n"),
			     strerror(errno));
		if (dmon.enable)
			dmon_start(status);
	}

	exit(status);
}

void free_user_data(void)
{
	unsigned i;

	day_free_vector();
	event_llist_free();
	apoint_llist_free();
	recur_apoint_llist_free();
	recur_event_llist_free();
	for (i = 0; i <= 37; i++)
		ui_day_item_cut_free(i);
	todo_free_list();
	notify_free_app();
}

/* Function to exit on internal error. */
void fatalbox(const char *errmsg)
{
	WINDOW *errwin;
	const char *label = _("/!\\ INTERNAL ERROR /!\\");
	const char *reportmsg = _("Please report the following bug:");
	const int WINROW = 10;
	const int WINCOL = col - 2;
	const int MSGLEN = WINCOL - 2;
	char msg[MSGLEN];

	if (errmsg == NULL)
		return;

	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);
	mvwaddstr(errwin, 3, 1, reportmsg);
	mvwaddstr(errwin, 5, (WINCOL - strlen(msg)) / 2, msg);
	custom_remove_attr(errwin, ATTR_HIGHEST);
	wins_wrefresh(errwin);
	wgetch(errwin);
	delwin(errwin);
	wins_doupdate();
}

void warnbox(const char *msg)
{
	WINDOW *warnwin;
	const char *label = "/!\\";
	const int WINROW = 10;
	const int WINCOL = col - 2;
	const int MSGLEN = WINCOL - 2;
	char displmsg[MSGLEN];

	if (msg == NULL)
		return;

	strncpy(displmsg, msg, MSGLEN);
	warnwin =
	    newwin(WINROW, WINCOL, (row - WINROW) / 2, (col - WINCOL) / 2);
	custom_apply_attr(warnwin, ATTR_HIGHEST);
	box(warnwin, 0, 0);
	wins_show(warnwin, label);
	mvwaddstr(warnwin, 5, (WINCOL - strlen(displmsg)) / 2, displmsg);
	custom_remove_attr(warnwin, ATTR_HIGHEST);
	wins_wrefresh(warnwin);
	wgetch(warnwin);
	delwin(warnwin);
	wins_doupdate();
}

/*
 * Print a message in the status bar.
 * Message texts for first line and second line are to be provided.
 */
void status_mesg(const char *msg1, const char *msg2)
{
	wins_erase_status_bar();
	custom_apply_attr(win[STA].p, ATTR_HIGHEST);
	mvwaddstr(win[STA].p, 0, 0, msg1);
	mvwaddstr(win[STA].p, 1, 0, msg2);
	custom_remove_attr(win[STA].p, ATTR_HIGHEST);
	wins_wrefresh(win[STA].p);
}

/*
 * Prompts the user to make a choice between named alternatives.
 *
 * The available choices are described by a string of the form
 * "[ynp]". The first and last char are ignored (they are only here to
 * make the translators' life easier), and every other char indicates
 * a key the user is allowed to press.
 *
 * Returns the index of the key pressed by the user (starting from 1),
 * or -1 if the user doesn't want to answer (e.g. by escaping).
 */
int status_ask_choice(const char *message, const char choice[],
		      int nb_choice)
{
	int i, ch;
	char *tmp;
	/* "[4/2/f/t/w/.../Z] " */
	char avail_choice[2 * nb_choice + 3];

	avail_choice[0] = '[';
	avail_choice[1] = '\0';

	for (i = 1; i <= nb_choice; i++) {
		asprintf(&tmp, (i == nb_choice) ? "%c] " : "%c/", choice[i]);
		strcat(avail_choice, tmp);
		mem_free(tmp);
	}

	status_mesg(message, avail_choice);

	for (;;) {
		ch = wgetch(win[KEY].p);
		for (i = 1; i <= nb_choice; i++)
			if (ch == choice[i])
				return i;
		if (ch == ESCAPE)
			return (-1);
		if (resize) {
			resize = 0;
			wins_reset();
			status_mesg(message, avail_choice);
		}
	}
}

/*
 * Prompts the user with a boolean question.
 *
 * Returns 1 if yes, 2 if no, and -1 otherwise
 */
int status_ask_bool(const char *msg)
{
	return (status_ask_choice(msg, _("[yn]"), 2));
}

/*
 * Prompts the user to make a choice between a number of alternatives.
 *
 * Returns the option chosen by the user (starting from 1), or -1 if
 * the user doesn't want to answer.
 */
int
status_ask_simplechoice(const char *prefix, const char *choice[],
			int nb_choice)
{
	int i;
	char *tmp;
	/* "(1) Choice1, (2) Choice2, (3) Choice3?" */
	char choicestr[BUFSIZ];
	/* Holds the characters to choose from ('1', '2', etc) */
	char char_choice[nb_choice + 2];

	/* No need to initialize first and last char. */
	for (i = 1; i <= nb_choice; i++)
		char_choice[i] = '0' + i;

	strcpy(choicestr, prefix);

	for (i = 0; i < nb_choice; i++) {
		asprintf(&tmp,
			 ((i + 1) == nb_choice) ? "(%d) %s?" : "(%d) %s, ",
			 (i + 1), choice[i]);
		strcat(choicestr, tmp);
		mem_free(tmp);
	}

	return (status_ask_choice(choicestr, char_choice, nb_choice));
}

/* 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++)
			mvwaddstr(win, r, c, " ");
	}
}

/* draws a popup window */
WINDOW *popup(int pop_row, int pop_col, int pop_y, int pop_x,
	      const char *title, const char *msg, int hint)
{
	const char *any_key = _("Press any key to continue...");
	WINDOW *popup_win;
	const int MSGXPOS = 5;

	popup_win = newwin(pop_row, pop_col, pop_y, pop_x);
	keypad(popup_win, TRUE);
	if (msg)
		mvwaddstr(popup_win, MSGXPOS, (pop_col - strlen(msg)) / 2,
			  msg);
	custom_apply_attr(popup_win, ATTR_HIGHEST);
	box(popup_win, 0, 0);
	wins_show(popup_win, title);
	if (hint)
		mvwaddstr(popup_win, pop_row - 2,
			  pop_col - (strlen(any_key) + 1), any_key);
	custom_remove_attr(popup_win, ATTR_HIGHEST);
	wins_wrefresh(popup_win);

	return popup_win;
}

/* prints in middle of a panel */
void
print_in_middle(WINDOW * win, int starty, int startx, int width,
		const char *string)
{
	int len = strlen(string);
	int x, y;

	win = win ? win : stdscr;
	getyx(win, y, x);
	x = startx ? startx : x;
	y = starty ? starty : y;
	width = width ? width : 80;

	x += (width - len) / 2;

	custom_apply_attr(win, ATTR_HIGHEST);
	mvwaddstr(win, y, x, string);
	custom_remove_attr(win, ATTR_HIGHEST);
}

/* checks if a string is only made of digits */
int is_all_digit(const char *string)
{
	for (; *string; string++) {
		if (!isdigit((int)*string))
			return 0;
	}

	return 1;
}

/* Given an item date expressed in seconds, return its start time in seconds. */
long get_item_time(long date)
{
	return (long)(get_item_hour(date) * HOURINSEC +
		      get_item_min(date) * MININSEC);
}

int get_item_hour(long date)
{
	struct tm lt;

	localtime_r((time_t *) & date, &lt);
	return lt.tm_hour;
}

int get_item_min(long date)
{
	struct tm lt;

	localtime_r((time_t *) & date, &lt);
	return lt.tm_min;
}

long date2sec(struct date day, unsigned hour, unsigned min)
{
	time_t t = now();
	struct tm start;

	localtime_r(&t, &start);

	start.tm_mon = day.mm - 1;
	start.tm_mday = day.dd;
	start.tm_year = day.yyyy - 1900;
	start.tm_hour = hour;
	start.tm_min = min;
	start.tm_sec = 0;
	start.tm_isdst = -1;

	t = mktime(&start);
	EXIT_IF(t == -1, _("failure in mktime"));

	return t;
}

/* Return a string containing the date, given a date in seconds. */
char *date_sec2date_str(long sec, const char *datefmt)
{
	struct tm lt;
	char *datestr = (char *)mem_calloc(BUFSIZ, sizeof(char));

	if (sec == 0) {
		strncpy(datestr, "0", BUFSIZ);
	} else {
		localtime_r((time_t *) & sec, &lt);
		strftime(datestr, BUFSIZ, datefmt, &lt);
	}

	return datestr;
}

/* Generic function to format date. */
void date_sec2date_fmt(long sec, const char *fmt, char *datef)
{
#if ENABLE_NLS
	/* TODO: Find a better way to deal with localization and strftime(). */
	char *locale_old = mem_strdup(setlocale(LC_ALL, NULL));
	setlocale(LC_ALL, "C");
#endif

	struct tm lt;
	localtime_r((time_t *) & sec, &lt);
	strftime(datef, BUFSIZ, fmt, &lt);

#if ENABLE_NLS
	setlocale(LC_ALL, locale_old);
	mem_free(locale_old);
#endif
}

/*
 * 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;
	localtime_r(&t, &lt);
	lt.tm_mon += delta_month;
	lt.tm_mday += delta_day;
	lt.tm_isdst = -1;
	t = mktime(&lt);
	EXIT_IF(t == -1, _("failure in mktime"));

	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;
	localtime_r(&t, &lt);
	lt.tm_hour = hr;
	lt.tm_min = mn;
	new_date = mktime(&lt);
	EXIT_IF(new_date == -1, _("error in mktime"));

	return new_date;
}

/*
 * Returns the date in seconds from year 1900.
 * If no date is entered, current date is chosen.
 */
long get_sec_date(struct date 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);
		localtime_r(&timer, &ptrtime);
		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;
}

/*
 * 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, unsigned hilt)
{
	mvwvline(win, bar_top, x, ACS_VLINE, bar_bottom - bar_top + 1);
	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(const char *a_start, const char *a_end, const char *msg,
	      const 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, NULL, 1);
	if (a_start && a_end) {
		mvwprintw(popup_win, margin_top, margin_left, "- %s -> %s",
			  a_start, a_end);
	}
	mvwaddstr(pad, 0, margin_left, msg);
	wmove(win[STA].p, 0, 0);
	pnoutrefresh(pad, 0, 0, margin_top + 2, margin_left, padl, winw);
	wins_doupdate();
	wgetch(popup_win);
	delwin(pad);
	delwin(popup_win);
}

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

	current_time = time(NULL);
	localtime_r(&current_time, &lt);
	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)
{
	return (long)time(NULL);
}

char *nowstr(void)
{
	struct tm lt;
	static char buf[BUFSIZ];
	time_t t = now();

	localtime_r(&t, &lt);
	strftime(buf, sizeof buf, "%a %b %d %T %Y", &lt);

	return buf;
}

/* Print the given option value with appropriate color. */
void
print_bool_option_incolor(WINDOW * win, unsigned option, int pos_y,
			  int pos_x)
{
	int color = 0;
	const char *option_value;

	if (option == 1) {
		color = ATTR_TRUE;
		option_value = _("yes");
	} else if (option == 0) {
		color = ATTR_FALSE;
		option_value = _("no");
	} else {
		EXIT(_("option not defined"));
	}

	custom_apply_attr(win, color);
	mvwaddstr(win, pos_y, pos_x, option_value);
	custom_remove_attr(win, color);
	wnoutrefresh(win);
	wins_doupdate();
}

/*
 * Get the name of the default directory for temporary files.
 */
const char *get_tempdir(void)
{
	if (getenv("TMPDIR"))
		return getenv("TMPDIR");
#ifdef P_tmpdir
	else if (P_tmpdir)
		return P_tmpdir;
#endif
	else
		return "/tmp";
}

/*
 * 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)
{
	char *fullname;
	int fd;
	FILE *file;

	if (prefix == NULL)
		return NULL;

	asprintf(&fullname, "%s.XXXXXX", prefix);
	if ((fd = mkstemp(fullname)) == -1
	    || (file = fdopen(fd, "w+")) == NULL) {
		if (fd != -1) {
			unlink(fullname);
			close(fd);
		}
		ERROR_MSG(_("temporary file \"%s\" could not be created"),
			  fullname);

		mem_free(fullname);
		return NULL;
	}
	fclose(file);

	return fullname;
}

/*
 * Check if a date is valid.
 */
int check_date(unsigned year, unsigned month, unsigned day)
{
	return (year >= 1902 && year <= 2037 && month >= 1 && month <= 12
		&& day >= 1 && day <= days[month - 1] + (month == 2
							 && ISLEAP(year)) ?
		1 : 0);
}

/*
 * Convert a string containing a date into three integers containing the year,
 * month and day.
 *
 * If a pointer to a date structure containing the current date is passed as
 * last parameter ("slctd_date"), the function will accept several short forms,
 * e.g. "26" for the 26th of the current month/year or "3/1" for Mar 01 (or Jan
 * 03, depending on the date format) of the current year. If a null pointer is
 * passed, short forms won't be accepted at all.
 *
 * Returns 1 if sucessfully converted or 0 if the string is an invalid date.
 */
int
parse_date(const char *date_string, enum datefmt datefmt, int *year,
	   int *month, int *day, struct date *slctd_date)
{
	const char sep = (datefmt == DATEFMT_ISO) ? '-' : '/';
	const char *p;
	int in[3] = { 0, 0, 0 }, n = 0;
	int d, m, y;

	if (!date_string)
		return 0;

	/* parse string into in[], read up to three integers */
	for (p = date_string; *p; p++) {
		if (*p == sep) {
			if ((++n) > 2)
				return 0;
		} else if ((*p >= '0') && (*p <= '9')) {
			in[n] = in[n] * 10 + (int)(*p - '0');
		} else {
			return 0;
		}
	}

	if ((!slctd_date && n < 2) || in[n] == 0)
		return 0;

	/* convert into day, month and year, depending on the date format */
	switch (datefmt) {
	case DATEFMT_MMDDYYYY:
		m = (n >= 1) ? in[0] : 0;
		d = (n >= 1) ? in[1] : in[0];
		y = in[2];
		break;
	case DATEFMT_DDMMYYYY:
		d = in[0];
		m = in[1];
		y = in[2];
		break;
	case DATEFMT_YYYYMMDD:
	case DATEFMT_ISO:
		y = (n >= 2) ? in[n - 2] : 0;
		m = (n >= 1) ? in[n - 1] : 0;
		d = in[n];
		break;
	default:
		return 0;
	}

	if (slctd_date) {
		if (y > 0 && y < 100) {
			/* convert "YY" format into "YYYY" */
			y += slctd_date->yyyy - slctd_date->yyyy % 100;
		} else if (n < 2) {
			/* set year and, optionally, month if short from is used */
			y = slctd_date->yyyy;
			if (n < 1)
				m = slctd_date->mm;
		}
	}

	/* check if date is valid, take leap years into account */
	if (!check_date(y, m, d))
		return 0;

	if (year)
		*year = y;
	if (month)
		*month = m;
	if (day)
		*day = d;

	return 1;
}

/*
 * Check if time is valid.
 */
int check_time(unsigned hours, unsigned minutes)
{
	return (hours < DAYINHOURS && minutes < HOURINMIN);
}

/*
 * Converts a time string into hours and minutes. Short forms like "23:"
 * (23:00) or ":45" (0:45) are allowed.
 *
 * Returns 1 on success and 0 on failure.
 */
int parse_time(const char *string, unsigned *hour, unsigned *minute)
{
	const char *p;
	unsigned in[2] = { 0, 0 }, n = 0;

	if (!string)
		return 0;

	/* parse string into in[], read up to two integers */
	for (p = string; *p; p++) {
		if (*p == ':') {
			if ((++n) > 1)
				return 0;
		} else if ((*p >= '0') && (*p <= '9')) {
			if ((n == 0) && (p == (string + 2)) && *(p + 1))
				n++;
			in[n] = in[n] * 10 + (int)(*p - '0');
		} else {
			return 0;
		}
	}

	if (n != 1 || !check_time(in[0], in[1]))
		return 0;

	*hour = in[0];
	*minute = in[1];
	return 1;
}

/*
 * Converts a duration string into minutes.
 *
 * Allowed formats (noted as regular expressions):
 *
 * - \d*:\d*
 * - (\d*m|\d*h(|\d*m)|\d*d(|\d*m|\d*h(|\d*m)))
 * - \d+
 *
 * "\d" is used as a placeholder for "(0|1|2|3|4|5|6|7|8|9)".
 *
 * Returns 1 on success and 0 on failure.
 */
int parse_duration(const char *string, unsigned *duration)
{
	enum {
		STATE_INITIAL,
		STATE_HHMM_MM,
		STATE_DDHHMM_HH,
		STATE_DDHHMM_MM,
		STATE_DONE
	} state = STATE_INITIAL;

	const char *p;
	unsigned in = 0;
	unsigned dur = 0;

	if (!string || *string == '\0')
		return 0;

	/* parse string using a simple state machine */
	for (p = string; *p; p++) {
		if (state == STATE_DONE) {
			return 0;
		} else if ((*p >= '0') && (*p <= '9')) {
			in = in * 10 + (int)(*p - '0');
		} else {
			switch (state) {
			case STATE_INITIAL:
				if (*p == ':') {
					dur += in * HOURINMIN;
					state = STATE_HHMM_MM;
				} else if (*p == 'd') {
					dur += in * DAYINMIN;
					state = STATE_DDHHMM_HH;
				} else if (*p == 'h') {
					dur += in * HOURINMIN;
					state = STATE_DDHHMM_MM;
				} else if (*p == 'm') {
					dur += in;
					state = STATE_DONE;
				} else {
					return 0;
				}
				break;
			case STATE_DDHHMM_HH:
				if (*p == 'h') {
					dur += in * HOURINMIN;
					state = STATE_DDHHMM_MM;
				} else if (*p == 'm') {
					dur += in;
					state = STATE_DONE;
				} else {
					return 0;
				}
				break;
			case STATE_DDHHMM_MM:
				if (*p == 'm') {
					dur += in;
					state = STATE_DONE;
				} else {
					return 0;
				}
				break;
			case STATE_HHMM_MM:
				return 0;
				break;
			default:
				break;
			}

			in = 0;
		}
	}

	if ((state == STATE_HHMM_MM && in >= HOURINMIN) ||
	    ((state == STATE_DDHHMM_HH || state == STATE_DDHHMM_MM)
	     && in > 0))
		return 0;

	dur += in;
	*duration = dur;

	return 1;
}

void file_close(FILE * f, const char *pos)
{
	EXIT_IF((fclose(f)) != 0, _("Error when closing file at %s"), pos);
}

/*
 * Sleep the given number of seconds, but make it more 'precise' than sleep(3)
 * (hence the 'p') in a way that even if a signal is caught during the sleep
 * process, this function will return to sleep afterwards.
 */
void psleep(unsigned secs)
{
	unsigned unslept;

	for (unslept = sleep(secs); unslept; unslept = sleep(unslept)) ;
}

/*
 * Fork and execute an external process.
 *
 * If pfdin and/or pfdout point to a valid address, a pipe is created and the
 * appropriate file descriptors are written to pfdin/pfdout.
 */
int fork_exec(int *pfdin, int *pfdout, const char *path,
	      const char *const *arg)
{
	int pin[2], pout[2];
	int pid;

	if (pfdin && (pipe(pin) == -1))
		return 0;
	if (pfdout && (pipe(pout) == -1))
		return 0;

	if ((pid = fork()) == 0) {
		if (pfdout) {
			if (dup2(pout[0], STDIN_FILENO) < 0)
				_exit(127);
			close(pout[0]);
			close(pout[1]);
		}

		if (pfdin) {
			if (dup2(pin[1], STDOUT_FILENO) < 0)
				_exit(127);
			close(pin[0]);
			close(pin[1]);
		}

		execvp(path, (char *const *)arg);
		_exit(127);
	} else {
		if (pfdin)
			close(pin[1]);
		if (pfdout)
			close(pout[0]);

		if (pid > 0) {
			if (pfdin) {
				fcntl(pin[0], F_SETFD, FD_CLOEXEC);
				*pfdin = pin[0];
			}
			if (pfdout) {
				fcntl(pout[1], F_SETFD, FD_CLOEXEC);
				*pfdout = pout[1];
			}
		} else {
			if (pfdin)
				close(pin[0]);
			if (pfdout)
				close(pout[1]);
			return 0;
		}
	}
	return pid;
}

/* Execute an external program in a shell. */
int
shell_exec(int *pfdin, int *pfdout, const char *path,
	   const char *const *arg)
{
	int argc, i;
	const char **narg;
	char *arg0 = NULL;
	int ret;

	for (argc = 0; arg[argc]; argc++) ;

	if (argc < 1)
		return -1;

	narg = mem_calloc(argc + 4, sizeof(const char *));

	narg[0] = "sh";
	narg[1] = "-c";

	if (argc > 1) {
		asprintf(&arg0, "%s \"$@\"", path);
		narg[2] = arg0;

		for (i = 0; i < argc; i++)
			narg[i + 3] = arg[i];
		narg[argc + 3] = NULL;
	} else {
		narg[2] = path;
		narg[3] = NULL;
	}

	ret = fork_exec(pfdin, pfdout, *narg, narg);

	if (arg0)
		mem_free(arg0);
	mem_free(narg);

	return ret;
}

/* Wait for a child process to terminate. */
int child_wait(int *pfdin, int *pfdout, int pid)
{
	int stat;

	if (pfdin)
		close(*pfdin);
	if (pfdout)
		close(*pfdout);

	waitpid(pid, &stat, 0);
	return stat;
}

/* Display "Press any key to continue..." and wait for a key press. */
void press_any_key(void)
{
	struct termios t_attr_old, t_attr;

	tcgetattr(STDIN_FILENO, &t_attr_old);
	memcpy(&t_attr, &t_attr_old, sizeof(struct termios));
	t_attr.c_lflag &= ~(ICANON | ECHO | ECHONL);
	tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_attr);

	fflush(stdout);
	fputs(_("Press any key to continue..."), stdout);
	fflush(stdout);
	fgetc(stdin);
	fflush(stdin);
	fputs("\r\n", stdout);

	tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_attr_old);
}

/*
 * Display note contents if one is asociated with the currently displayed item
 * (to be used together with the '-a' or '-t' flag in non-interactive mode).
 * Each line begins with nbtab tabs.
 * Print "No note file found", if the notefile does not exists.
 *
 * (patch submitted by Erik Saule).
 */
static void print_notefile(FILE * out, const char *filename, int nbtab)
{
	char *path_to_notefile;
	FILE *notefile;
	char linestarter[BUFSIZ];
	char buffer[BUFSIZ];
	int i;
	int printlinestarter = 1;

	if (nbtab < BUFSIZ) {
		for (i = 0; i < nbtab; i++)
			linestarter[i] = '\t';
		linestarter[nbtab] = '\0';
	} else {
		linestarter[0] = '\0';
	}

	asprintf(&path_to_notefile, "%s/%s", path_notes, filename);
	notefile = fopen(path_to_notefile, "r");
	mem_free(path_to_notefile);
	if (notefile) {
		while (fgets(buffer, BUFSIZ, notefile) != 0) {
			if (printlinestarter) {
				fputs(linestarter, out);
				printlinestarter = 0;
			}
			fputs(buffer, out);
			if (buffer[strlen(buffer) - 1] == '\n')
				printlinestarter = 1;
		}
		fputs("\n", out);
		file_close(notefile, __FILE_POS__);
	} else {
		fputs(linestarter, out);
		fputs(_("No note file found\n"), out);
	}
}

/* Print an escape sequence and return its length. */
static int print_escape(const char *s)
{
	switch (*(s + 1)) {
	case 'a':
		putchar('\a');
		return 1;
	case 'b':
		putchar('\b');
		return 1;
	case 'f':
		putchar('\f');
		return 1;
	case 'n':
		putchar('\n');
		return 1;
	case 'r':
		putchar('\r');
		return 1;
	case 't':
		putchar('\t');
		return 1;
	case 'v':
		putchar('\v');
		return 1;
	case '0':
		putchar('\0');
		return 1;
	case '\'':
		putchar('\'');
		return 1;
	case '"':
		putchar('"');
		return 1;
	case '\?':
		putchar('?');
		return 1;
	case '\\':
		putchar('\\');
		return 1;
	case '\0':
		return 0;
	default:
		return 1;
	}
}

/* Parse a format specifier. */
static enum format_specifier parse_fs(const char **s, char *extformat)
{
	char buf[FS_EXT_MAXLEN];
	int i;

	extformat[0] = '\0';

	switch (**s) {
	case 's':
		strcpy(extformat, "epoch");
		return FS_STARTDATE;
	case 'S':
		return FS_STARTDATE;
	case 'd':
		return FS_DURATION;
	case 'e':
		strcpy(extformat, "epoch");
		return FS_ENDDATE;
	case 'E':
		return FS_ENDDATE;
	case 'm':
		return FS_MESSAGE;
	case 'n':
		return FS_NOTE;
	case 'N':
		return FS_NOTEFILE;
	case 'p':
		return FS_PRIORITY;
	case 'r':
		return FS_REMAINING;
	case '(':
		/* Long format specifier. */
		for ((*s)++, i = 0; **s != ':' && **s != ')'; (*s)++, i++) {
			if (**s == '\0')
				return FS_EOF;

			if (i < FS_EXT_MAXLEN)
				buf[i] = **s;
		}

		buf[(i < FS_EXT_MAXLEN) ? i : FS_EXT_MAXLEN - 1] = '\0';

		if (**s == ':') {
			for ((*s)++, i = 0; **s != ')'; (*s)++, i++) {
				if (**s == '\0')
					return FS_EOF;

				if (i < FS_EXT_MAXLEN)
					extformat[i] = **s;
			}

			extformat[(i <
				   FS_EXT_MAXLEN) ? i : FS_EXT_MAXLEN -
				  1] = '\0';
		}

		if (!strcmp(buf, "start"))
			return FS_STARTDATE;
		else if (!strcmp(buf, "duration"))
			return FS_DURATION;
		else if (!strcmp(buf, "end"))
			return FS_ENDDATE;
		else if (!strcmp(buf, "remaining"))
			return FS_REMAINING;
		else if (!strcmp(buf, "message"))
			return FS_MESSAGE;
		else if (!strcmp(buf, "noteid"))
			return FS_NOTE;
		else if (!strcmp(buf, "note"))
			return FS_NOTEFILE;
		else if (!strcmp(buf, "priority"))
			return FS_PRIORITY;
		else
			return FS_UNKNOWN;
	case '%':
		return FS_PSIGN;
	case '\0':
		return FS_EOF;
	default:
		return FS_UNKNOWN;
	}
}

/* Print a formatted date to stdout. */
static void print_date(long date, long day, const char *extformat)
{
	char buf[BUFSIZ];

	if (!strcmp(extformat, "epoch")) {
		printf("%ld", date);
	} else {
		time_t t = date;
		struct tm lt;

		localtime_r((time_t *) & t, &lt);

		if (extformat[0] == '\0' || !strcmp(extformat, "default")) {
			if (date >= day && date <= day + DAYINSEC)
				strftime(buf, BUFSIZ, "%H:%M", &lt);
			else
				strftime(buf, BUFSIZ, "..:..", &lt);
		} else {
			strftime(buf, BUFSIZ, extformat, &lt);
		}

		printf("%s", buf);
	}
}

/* Print a time difference to stdout. */
static void print_datediff(long difference, const char *extformat)
{
	const char *p;
	const char *numfmt;
	bool usetotal;
	long value;

	if (!strcmp(extformat, "epoch")) {
		printf("%ld", difference);
	} else {
		if (extformat[0] == '\0' || !strcmp(extformat, "default")) {
			/* Set a default format if none specified. */
			p = "%EH:%M";
		} else {
			p = extformat;
		}
		while (*p) {
			if (*p == '%') {
				p++;
				/* Default is to zero-pad, and assume
				 * the user wants the time unit modulo
				 * the next biggest time unit. */
				numfmt = "%02d";
				usetotal = FALSE;
				if (*p == '-') {
					numfmt = "%d";
					p++;
				}
				if (*p == 'E') {
					usetotal = TRUE;
					p++;
				}
				switch (*p) {
				case '\0':
					return;
				case 'd':
					value = difference / DAYINSEC;
					printf(numfmt, value);
					break;
				case 'H':
					value = difference / HOURINSEC;
					if (!usetotal)
						value %= DAYINHOURS;
					printf(numfmt, value);
					break;
				case 'M':
					value = difference / MININSEC;
					if (!usetotal)
						value %= HOURINMIN;
					printf(numfmt, value);
					break;
				case 'S':
					value = difference;
					if (!usetotal)
						value %= MININSEC;
					printf(numfmt, value);
					break;
				case '%':
					putchar('%');
					break;
				default:
					putchar('?');
					break;
				}
			} else {
				putchar(*p);
			}
			p++;
		}
	}
}

/* Print a formatted appointment to stdout. */
void print_apoint(const char *format, long day, struct apoint *apt)
{
	const char *p;
	char extformat[FS_EXT_MAXLEN];


	for (p = format; *p; p++) {
		if (*p == '%') {
			p++;
			switch (parse_fs(&p, extformat)) {
			case FS_STARTDATE:
				print_date(apt->start, day, extformat);
				break;
			case FS_DURATION:
				/* Backwards compatibility: Use epoch by
				 * default. */
				if (*extformat == '\0')
					strcpy(extformat, "epoch");
				print_datediff(apt->dur, extformat);
				break;
			case FS_ENDDATE:
				print_date(apt->start + apt->dur, day,
					   extformat);
				break;
			case FS_REMAINING:
				print_datediff(difftime(apt->start, now()),
				               extformat);
				break;
			case FS_MESSAGE:
				printf("%s", apt->mesg);
				break;
			case FS_NOTE:
				printf("%s", apt->note);
				break;
			case FS_NOTEFILE:
				print_notefile(stdout, apt->note, 1);
				break;
			case FS_PSIGN:
				putchar('%');
				break;
			case FS_EOF:
				return;
				break;
			default:
				putchar('?');
				break;
			}
		} else if (*p == '\\') {
			p += print_escape(p);
		} else {
			putchar(*p);
		}
	}
}

/* Print a formatted event to stdout. */
void print_event(const char *format, long day, struct event *ev)
{
	const char *p;
	char extformat[FS_EXT_MAXLEN];

	for (p = format; *p; p++) {
		if (*p == '%') {
			p++;
			switch (parse_fs(&p, extformat)) {
			case FS_MESSAGE:
				printf("%s", ev->mesg);
				break;
			case FS_NOTE:
				printf("%s", ev->note);
				break;
			case FS_NOTEFILE:
				print_notefile(stdout, ev->note, 1);
				break;
			case FS_PSIGN:
				putchar('%');
				break;
			case FS_EOF:
				return;
				break;
			default:
				putchar('?');
				break;
			}
		} else if (*p == '\\') {
			p += print_escape(p);
		} else {
			putchar(*p);
		}
	}
}

/* Print a formatted recurrent appointment to stdout. */
void
print_recur_apoint(const char *format, long day, unsigned occurrence,
		   struct recur_apoint *rapt)
{
	struct apoint apt;

	apt.start = occurrence;
	apt.dur = rapt->dur;
	apt.mesg = rapt->mesg;
	apt.note = rapt->note;

	print_apoint(format, day, &apt);
}

/* Print a formatted recurrent event to stdout. */
void print_recur_event(const char *format, long day,
		       struct recur_event *rev)
{
	struct event ev;

	ev.mesg = rev->mesg;
	ev.note = rev->note;

	print_event(format, day, &ev);
}

/* Print a formatted todo item to stdout. */
void print_todo(const char *format, struct todo *todo)
{
	const char *p;
	char extformat[FS_EXT_MAXLEN];

	for (p = format; *p; p++) {
		if (*p == '%') {
			p++;
			switch (parse_fs(&p, extformat)) {
			case FS_PRIORITY:
				printf("%d", abs(todo->id));
				break;
			case FS_MESSAGE:
				printf("%s", todo->mesg);
				break;
			case FS_NOTE:
				printf("%s", todo->note);
				break;
			case FS_NOTEFILE:
				print_notefile(stdout, todo->note, 1);
				break;
			case FS_PSIGN:
				putchar('%');
				break;
			case FS_EOF:
				return;
				break;
			default:
				putchar('?');
				break;
			}
		} else if (*p == '\\') {
			p += print_escape(p);
		} else {
			putchar(*p);
		}
	}
}

#define VASPRINTF_INITIAL_BUFSIZE 128

int
vasprintf(char **str, const char *format, va_list ap)
{
	va_list ap2;
	int n;

	va_copy(ap2, ap);

	*str = mem_malloc(VASPRINTF_INITIAL_BUFSIZE);
	n = vsnprintf(*str, VASPRINTF_INITIAL_BUFSIZE, format, ap);
	if (n >= VASPRINTF_INITIAL_BUFSIZE) {
		*str = mem_realloc(*str, 1, n + 1);
		n = vsnprintf(*str, n + 1, format, ap2);
	}

	if (n < 0) {
		mem_free(*str);
		*str = NULL;
	}

	return n;
}

int
asprintf(char **str, const char *format, ...)
{
	va_list	ap;
	int n;

	va_start(ap, format);
	n = vasprintf(str, format, ap);
	va_end(ap);

	return n;
}