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calpick/ncal.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1997 Wolfgang Helbig
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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 AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
#include "calendar.h"
#include <ctype.h>
#include <err.h>
#include <langinfo.h>
#include <libgen.h>
#include <locale.h>
#include <ncurses.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <time.h>
#include <unistd.h>
#include <wchar.h>
#include <wctype.h>
#include <term.h>
#undef lines /* term.h defines this */
/* Width of one month with backward compatibility and in regular mode*/
#define MONTH_WIDTH_B_J 27
#define MONTH_WIDTH_B_NW 20
#define MONTH_WIDTH_B_WW 25
#define MONTH_WIDTH_R_J 24
#define MONTH_WIDTH_R 18
#define MAX_WIDTH 79
typedef struct date date;
struct weekdays {
wchar_t names[7][4];
};
/* The switches from Julian to Gregorian in some countries */
static struct djswitch {
const char *cc; /* Country code according to ISO 3166 */
const char *nm; /* Name of country */
date dt; /* Last day of Julian calendar */
} switches[] = {
{"AL", "Albania", {1912, 11, 30}},
{"AT", "Austria", {1583, 10, 5}},
{"AU", "Australia", {1752, 9, 2}},
{"BE", "Belgium", {1582, 12, 14}},
{"BG", "Bulgaria", {1916, 3, 18}},
{"CA", "Canada", {1752, 9, 2}},
{"CH", "Switzerland", {1655, 2, 28}},
{"CN", "China", {1911, 12, 18}},
{"CZ", "Czech Republic",{1584, 1, 6}},
{"DE", "Germany", {1700, 2, 18}},
{"DK", "Denmark", {1700, 2, 18}},
{"ES", "Spain", {1582, 10, 4}},
{"FI", "Finland", {1753, 2, 17}},
{"FR", "France", {1582, 12, 9}},
{"GB", "United Kingdom",{1752, 9, 2}},
{"GR", "Greece", {1924, 3, 9}},
{"HU", "Hungary", {1587, 10, 21}},
{"IS", "Iceland", {1700, 11, 16}},
{"IT", "Italy", {1582, 10, 4}},
{"JP", "Japan", {1918, 12, 18}},
{"LI", "Lithuania", {1918, 2, 1}},
{"LN", "Latin", {9999, 05, 31}},
{"LU", "Luxembourg", {1582, 12, 14}},
{"LV", "Latvia", {1918, 2, 1}},
{"NL", "Netherlands", {1582, 12, 14}},
{"NO", "Norway", {1700, 2, 18}},
{"PL", "Poland", {1582, 10, 4}},
{"PT", "Portugal", {1582, 10, 4}},
{"RO", "Romania", {1919, 3, 31}},
{"RU", "Russia", {1918, 1, 31}},
{"SI", "Slovenia", {1919, 3, 4}},
{"SE", "Sweden", {1753, 2, 17}},
{"TR", "Turkey", {1926, 12, 18}},
{"US", "United States", {1752, 9, 2}},
{"YU", "Yugoslavia", {1919, 3, 4}}
};
static struct djswitch *dftswitch =
switches + sizeof(switches) / sizeof(struct djswitch) - 2;
/* default switch (should be "US") */
/* Table used to print day of month and week numbers */
static char daystr[] = " 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";
/* Table used to print day of year and week numbers */
static char jdaystr[] = " 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";
static int flag_weeks; /* user wants number of week */
static int nswitch; /* user defined switch date */
static int nswitchb; /* switch date for backward compatibility */
int weekstart = -1; /* day the week starts on (Sun [0] - Sat [6]) */
static void printcentered(int line, char *s, int start, int end);
static wchar_t *wcenter(wchar_t *s, wchar_t *t, int w);
static int firstday(int y, int m);
static void highlight(char *dst, char *src, int len, int *extraletters);
static void printweeknumber(int line, int y, int m, int jd_flag);
static void printmonthr(int line, int col, int y, int m, int jd_flag,
int highlightdate);
static void printmonthb(int line, int col, int y, int m, int jd_flag,
int highlightdate);
static void mkweekdays(struct weekdays * wds);
static void processkeyr(int key, int year, int m, int jd_flag,
int before, int after, int *highlightdate);
static void processkeyb(int key, int year, int m, int jd_flag,
int before, int after, int *highlightdate);
static void monthranger(int year, int m, int jd_flag,
int before, int after, int highlightdate);
static void monthrangeb(int year, int m, int jd_flag,
int before, int after, int highlightdate);
static int parsemonth(const char *s, int *m, int *y);
static void printcc(void);
static void printeaster(int year, int julian, int orthodox);
static date *sdater(int ndays, struct date * d);
static date *sdateb(int ndays, struct date * d);
static int sndaysr(struct date * d);
static int sndaysb(struct date * d);
static void usage(void);
int
main(int argc, char *argv[])
{
struct djswitch *p, *q; /* to search user defined switch date */
date never = {10000, 1, 1}; /* outside valid range of dates */
date ukswitch = {1752, 9, 2};/* switch date for Great Britain */
date dt;
int ch; /* holds the option character */
int m = 0; /* month */
int y = 0; /* year */
int flag_backward = 0; /* user called cal--backward compat. */
int ncal_backward = 0; /* make output of ncal backward compat. */
int no_backward = 0; /* to make sure conflicting options really conflict */
int flag_wholeyear = 0; /* user wants the whole year */
int flag_julian_cal = 0; /* user wants Julian Calendar */
int flag_julian_day = 0; /* user wants the Julian day numbers */
int flag_orthodox = 0; /* user wants Orthodox easter */
int flag_easter = 0; /* user wants easter date */
int flag_3months = 0; /* user wants 3 month display (-3) */
int flag_1month = 0; /* user wants 1 month display (-1) */
int flag_after = 0; /* user wants to see months after */
int flag_before = 0; /* user wants to see months before */
int flag_givenmonth = 0; /* user has specified month */
int flag_givenyear = 0; /* user has specified year */
char *cp; /* character pointer */
char *flag_today = NULL; /* debug: use date as being today */
char *flag_month = NULL; /* requested month as string */
char *flag_highlightdate = NULL; /* debug: date to highlight */
int highlightdate;
int before, after;
const char *locale; /* locale to get country code */
flag_weeks = 0;
/*
* Use locale to determine the country code,
* and use the country code to determine the default
* switchdate and date format from the switches table.
*/
if (setlocale(LC_ALL, "") == NULL)
warn("setlocale");
locale = setlocale(LC_TIME, NULL);
if (locale == NULL ||
strcmp(locale, "C") == 0 ||
strcmp(locale, "POSIX") == 0 ||
strcmp(locale, "ASCII") == 0 ||
strcmp(locale, "US-ASCII") == 0)
locale = "_US";
q = switches + sizeof(switches) / sizeof(struct djswitch);
for (p = switches; p != q; p++)
if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_')
break;
if (p == q) {
nswitch = ndaysj(&dftswitch->dt);
} else {
nswitch = ndaysj(&p->dt);
dftswitch = p;
}
/*
* Get the filename portion of argv[0] and set flag_backward if
* this program is called "cal".
*/
if (strncmp(basename(argv[0]), "cal", strlen("cal")) == 0)
flag_backward = 1;
/* Set the switch date to United Kingdom if backwards compatible */
if (flag_backward)
nswitchb = ndaysj(&ukswitch);
before = after = -1;
while ((ch = getopt(argc, argv, "31A:B:Cd:eH:hjJm:ops:wySMb")) != -1)
switch (ch) {
case 'b':
if (flag_backward)
usage();
else
no_backward = 1;
ncal_backward = 1;
break;
case '3':
flag_1month = 0;
flag_3months = 1;
flag_wholeyear = 0;
break;
case '1':
flag_1month = 1;
flag_3months = 0;
flag_wholeyear = 0;
break;
case 'A':
flag_after = strtol(optarg, NULL, 10);
break;
case 'B':
flag_before = strtol(optarg, NULL, 10);
break;
case 'J':
if (flag_backward)
usage();
else
no_backward = 1;
nswitch = ndaysj(&never);
flag_julian_cal = 1;
break;
case 'C':
if (no_backward == 1)
usage();
flag_backward = 1;
break;
case 'd':
flag_today = optarg;
break;
case 'H':
if (flag_backward)
usage();
else
no_backward = 1;
flag_highlightdate = optarg;
break;
case 'e':
if (flag_backward)
usage();
else
no_backward = 1;
flag_easter = 1;
break;
case 'j':
flag_julian_day = 1;
break;
case 'm':
flag_month = optarg;
flag_givenmonth = 1;
break;
case 'o':
if (flag_backward)
usage();
else
no_backward = 1;
flag_orthodox = 1;
flag_easter = 1;
break;
case 'p':
if (flag_backward)
usage();
printcc();
return (0);
break;
case 's':
if (flag_backward)
usage();
else
no_backward = 1;
q = switches +
sizeof(switches) / sizeof(struct djswitch);
for (p = switches;
p != q && strcmp(p->cc, optarg) != 0; p++)
;
if (p == q)
errx(EX_USAGE,
"%s: invalid country code", optarg);
nswitch = ndaysj(&(p->dt));
break;
case 'w':
if (flag_backward)
usage();
else
no_backward = 1;
flag_weeks = 1;
break;
case 'y':
flag_1month = 0;
flag_wholeyear = 1;
flag_3months = 0;
break;
case 'S':
if (flag_backward)
usage();
else
no_backward = 1;
weekstart = 0;
break;
case 'M':
if (flag_backward)
usage();
else
no_backward = 1;
weekstart = 1;
break;
default:
usage();
}
argc -= optind;
argv += optind;
switch (argc) {
case 2:
if (flag_easter)
usage();
flag_month = *argv++;
flag_givenmonth = 1;
m = strtol(flag_month, NULL, 10);
/* FALLTHROUGH */
case 1:
y = strtol(*argv, &cp, 10);
if (*cp != '\0')
errx(EX_USAGE, "not a valid year %s", *argv);
if (y < 1 || y > 9999)
errx(EX_USAGE, "year `%s' not in range 1..9999", *argv);
argv++;
flag_givenyear = 1;
break;
case 0:
if (flag_today != NULL) {
y = strtol(flag_today, NULL, 10);
m = strtol(flag_today + 5, NULL, 10);
} else {
time_t t;
struct tm *tm;
t = time(NULL);
tm = localtime(&t);
y = tm->tm_year + 1900;
m = tm->tm_mon + 1;
}
break;
default:
usage();
}
/* Technically not correct, but removes the need to add 1 later on */
if (flag_backward)
weekstart = (weekstart == -1) ? 1 : weekstart + 1;
/* Determine on what day the week starts. */
#ifdef __GLIBC__
else if (weekstart == -1)
{
int first_week_i;
date first_week_d;
date sunday = { .y = 1997, .m = 11, .d = 30 };
union { char *str; unsigned int word; } u;
u.str = nl_langinfo(_NL_TIME_WEEK_1STDAY);
first_week_i = u.word;
first_week_d.d = first_week_i % 100;
first_week_i /= 100;
first_week_d.m = first_week_i % 100;
first_week_i /= 100;
first_week_d.y = first_week_i;
weekstart = *nl_langinfo(_NL_TIME_FIRST_WEEKDAY) + (ndaysj(&first_week_d) - ndaysj(&sunday)) % 7 - 1;
}
#endif
if (ncal_backward)
{
flag_backward = 1;
weekstart++;
}
if (flag_month != NULL) {
if (parsemonth(flag_month, &m, &y)) {
errx(EX_USAGE,
"%s is neither a month number (1..12) nor a name",
flag_month);
}
}
/* The base month and/or year can be specified by any of the
following:
month year
year
-m month
<nothing>
In case of multiple specification of the same item (month
or year), the later one should override the earlier one.
(However, arguments are always evaluated after options). In
case neither month nor year is specified, use the current
month in the current year.
The range of months to display can be specified by one of
the following three options:
-y (display a calendar for the specified year - disregard month)
-3 (display 3 months - not possible if only year specified)
-1 (display 1 month - not possible if only year specified)
The default is -1, unless a year and no month is specified,
in which case -y is implied.
The options -1, -3, and -y methods are mutually exclusive;
if multiple ones are specified, the last one is used.
In addition, the range of months can be modified with the
following options:
-B n
-A m
This modifies the range of months specified by the other
options, by adding n additional months at the beginning and
m additional months at the end. Negative numbers *are*
allowed, as long as the total number of months displayed is
at least 1.
*/
/* if givenyear, but not givenmonth, then imply -y */
if (flag_givenyear && !flag_givenmonth) {
flag_wholeyear = 1;
if (flag_3months) {
errx(EX_USAGE,
"-3 together with a given year but no given month is "
"not supported.");
}
if (flag_1month) {
errx(EX_USAGE,
"-1 together with a given year but no given month is "
"not supported.");
}
}
/* otherwise, default to -1 */
if (!flag_wholeyear && !flag_3months) {
flag_1month = 1;
}
/* Select the period to display, in order of increasing priority .*/
if (flag_wholeyear) {
m = 1;
before = 0;
after = 11;
} else if (flag_3months) {
before = 1;
after = 1;
} else if (flag_1month) {
before = 0;
after = 0;
}
/* now add additional "before" and "after" values */
if (flag_before) {
before += flag_before;
}
if (flag_after) {
after += flag_after;
}
/* don't allow a period of 0 or less months */
if (before + after < 0) {
before = after = 0;
}
/* Highlight a specified day or today .*/
if (flag_highlightdate != NULL) {
dt.y = strtol(flag_highlightdate, NULL, 10);
dt.m = strtol(flag_highlightdate + 5, NULL, 10);
dt.d = strtol(flag_highlightdate + 8, NULL, 10);
} else {
time_t t;
struct tm *tm1;
t = time(NULL);
tm1 = localtime(&t);
dt.y = tm1->tm_year + 1900;
dt.m = tm1->tm_mon + 1;
dt.d = tm1->tm_mday;
}
highlightdate = sndaysb(&dt);
/* And now we finally start to calculate and output calendars. */
if (flag_easter)
printeaster(y, flag_julian_cal, flag_orthodox);
else {
int key;
initscr();
noecho();
curs_set(0);
keypad(stdscr, 1);
do {
clear();
if (flag_backward) {
monthrangeb(y, m, flag_julian_day, before, after, highlightdate);
key = getch();
processkeyb(key, y, m, flag_julian_day, before, after, &highlightdate);
} else {
monthranger(y, m, flag_julian_day, before, after, highlightdate);
key = getch();
mvprintw(30, 60, "%d %d", key, highlightdate);
processkeyr(key, y, m, flag_julian_day, before, after, &highlightdate);
}
} while (key != 'q');
endwin();
}
return (0);
}
static void
usage(void)
{
fputs(
"Usage: calpick [general options] [-bJjpwySM] [-H yyyy-mm-dd] [-s country_code] [[month] year]\n"
" calpick [general options] [-bJeoSM] [year]\n"
"General options: [-31] [-A months] [-B months] [-d yyyy-mm]\n",
stderr);
exit(EX_USAGE);
}
/* Print the assumed switches for all countries. */
static void
printcc(void)
{
struct djswitch *p;
int n; /* number of lines to print */
int m; /* offset from left to right table entry on the same line */
#define FSTR L"%c%s %-15s%4d-%02d-%02d"
#define DFLT(p) ((p) == dftswitch ? '*' : ' ')
#define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d
n = sizeof(switches) / sizeof(struct djswitch);
m = (n + 1) / 2;
n /= 2;
for (p = switches; p != switches + n; p++)
wprintf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m));
if (m != n)
wprintf(FSTR"\n", FSTRARG(p));
}
/* Print the date of easter sunday. */
static void
printeaster(int y, int julian, int orthodox)
{
date dt;
struct tm tm;
char buf[MAX_WIDTH];
/* force orthodox easter for years before 1583 */
if (y < 1583)
orthodox = 1;
if (orthodox)
if (julian)
easteroj(y, &dt);
else
easterog(y, &dt);
else
easterg(y, &dt);
memset(&tm, 0, sizeof(tm));
tm.tm_year = dt.y - 1900;
tm.tm_mon = dt.m - 1;
tm.tm_mday = dt.d;
strftime(buf, sizeof(buf), "%x", &tm);
wprintf(L"%s\n", buf);
}
#define MW(mw, me) ((mw) + me)
#define DECREASEMONTH(m, y) \
if (--m == 0) { \
m = 12; \
y--; \
}
#define INCREASEMONTH(m, y) \
if (++(m) == 13) { \
(m) = 1; \
(y)++; \
}
#define M2Y(m) ((m) / 12)
#define M2M(m) (1 + (m) % 12)
static void compute_month_name(int month_index, wchar_t *month_name, int mlen) {
struct tm tm;
memset(&tm, 0, sizeof(tm));
tm.tm_mon = month_index;
wcsftime(month_name, mlen, L"%B", &tm);
month_name[0] = towupper(month_name[0]);
}
/* Print all months for the period in the range [ before .. y-m .. after ]. */
static void
monthrangeb(int y, int m, int jd_flag, int before, int after, int highlightdate)
{
struct weekdays wds;
char s[MAX_WIDTH], t[MAX_WIDTH];
wchar_t ws[MAX_WIDTH], ws1[MAX_WIDTH];
const char *wdss;
int i, j;
int mpl;
int mw;
int m1, m2;
int printyearheader;
int prevyear = -1;
int startline = 0;
int screenlines, screencols;
mpl = jd_flag ? 2 : 3;
mw = jd_flag ? MONTH_WIDTH_B_J : (flag_weeks ? MONTH_WIDTH_B_WW : MONTH_WIDTH_B_NW );
wdss = (mpl == 2) ? " " : "";
getmaxyx(stdscr, screenlines, screencols);
while (before > 0) {
DECREASEMONTH(m, y);
before--;
after++;
}
while (before < 0) {
INCREASEMONTH(m, y);
before++;
after--;
}
m1 = y * 12 + m - 1;
m2 = m1 + after;
mkweekdays(&wds);
/*
* The year header is printed when there are more than 'mpl' months
* and if the first month is a multitude of 'mpl'.
* If not, it will print the year behind every month.
*/
printyearheader = (after >= mpl - 1) && (M2M(m1) - 1) % mpl == 0;
m = m1;
while (m <= m2) {
/* Year at the top. */
if (printyearheader && M2Y(m) != prevyear) {
sprintf(s, "%d", M2Y(m));
printcentered(startline, s, 1, mpl * mw);
prevyear = M2Y(m);
startline++;
}
/* Month names. */
mvaddstr(startline, 0, "");
for (i = 0; i != mpl && m + i <= m2; i++) {
wchar_t month_name[MAX_WIDTH+1];
compute_month_name(M2M(m + i) - 1, month_name, sizeof(month_name)/sizeof(month_name[0]));
if (printyearheader)
printw("%-*ls ",
mw, wcenter(ws, month_name, mw));
else {
swprintf(ws, sizeof(ws)/sizeof(ws[0]),
L"%-ls %d", month_name, M2Y(m + i));
printw("%-*ls ", mw, wcenter(ws1, ws, mw));
}
}
startline++;
/* Day of the week names. */
mvaddstr(startline, 0, "");
for (i = 0; i != mpl && m + i <= m2; i++) {
if (flag_weeks)
printw(" w| %s%ls%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls ",
wdss, wds.names[6], wdss, wds.names[0],
wdss, wds.names[1], wdss, wds.names[2],
wdss, wds.names[3], wdss, wds.names[4],
wdss, wds.names[5]);
else
printw("%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls ",
wdss, wds.names[6], wdss, wds.names[0],
wdss, wds.names[1], wdss, wds.names[2],
wdss, wds.names[3], wdss, wds.names[4],
wdss, wds.names[5]);
}
startline++;
/* And the days of the month. */
for (i = 0; i != mpl && m + i <= m2; i++)
printmonthb(startline, i*(mw+2), M2Y(m + i), M2M(m + i) - 1, jd_flag, highlightdate);
m += mpl;
startline += 7;
if (startline >= screenlines)
break;
}
}
static void
monthranger(int y, int m, int jd_flag, int before, int after, int highlightdate)
{
struct weekdays wds;
char s[MAX_WIDTH], t[MAX_WIDTH];
int i, j;
int mpl;
int mw;
int m1, m2;
int prevyear = -1;
int printyearheader;
int startline = 0;
int screenlines, screencols;
mpl = jd_flag ? 3 : 4;
mw = jd_flag ? MONTH_WIDTH_R_J : MONTH_WIDTH_R;
getmaxyx(stdscr, screenlines, screencols);
while (before > 0) {
DECREASEMONTH(m, y);
before--;
after++;
}
while (before < 0) {
INCREASEMONTH(m, y);
before++;
after--;
}
m1 = y * 12 + m - 1;
m2 = m1 + after;
mkweekdays(&wds);
/*
* The year header is printed when there are more than 'mpl' months
* and if the first month is a multitude of 'mpl'.
* If not, it will print the year behind every month.
*/
printyearheader = (after >= mpl - 1) && (M2M(m1) - 1) % mpl == 0;
m = m1;
while (m <= m2) {
/* Year at the top. */
if (printyearheader && M2Y(m) != prevyear) {
sprintf(s, "%d", M2Y(m));
printcentered(startline, s, 1, mpl * mw);
prevyear = M2Y(m);
startline++;
}
/* Month names. */
mvaddstr(startline, 1, " ");
for (i = 0; i != mpl && m + i <= m2; i++) {
wchar_t month_name[MAX_WIDTH+1];
compute_month_name(M2M(m + i) - 1, month_name, sizeof(month_name)/sizeof(month_name[0]));
if (printyearheader)
printw("%-*ls", mw, month_name);
else
printw("%-ls %-*d", month_name,
mw - wcslen(month_name) - 1, M2Y(m + i));
}
startline++;
/* Days of the week. */
for (i = 0; i != 7; i++)
mvprintw(startline+i, 0, "%.2ls", wds.names[i]);
/* Dates */
for (i = 0; i != mpl && m + i <= m2; i++)
printmonthr(startline, 3+i*mw, M2Y(m + i), M2M(m + i) - 1, jd_flag, highlightdate);
/* Week numbers. */
if (flag_weeks) {
mvprintw(startline+7, 0, " ");
for (i = 0; i != mpl && m + i <= m2; i++)
printweeknumber(startline, M2Y(m + i), M2M(m + i) - 1, jd_flag);
}
m += mpl;
startline += 8;
if (flag_weeks)
startline++;
if (startline >= screenlines)
break;
}
return;
}
static void
printmonthr(int line, int col, int y, int m, int jd_flag, int highlightdate)
{
date dt; /* handy date */
int dw; /* width of numbers */
int first; /* first day of month */
int firstm; /* first day of first week of month */
int i, j, k; /* just indices */
int last; /* the first day of next month */
int jan1 = 0; /* the first day of this year */
char *ds; /* pointer to day strings (daystr or
* jdaystr) */
/*
* Set first and last to the day number of the first day of this
* month and the first day of next month respectively. Set jan1 to
* the day number of the first day of this year.
*/
first = firstday(y, m + 1);
if (m == 11)
last = firstday(y + 1, 1);
else
last = firstday(y, m + 2);
if (jd_flag)
jan1 = firstday(y, 1);
/*
* Set firstm to the day number of the day starting the first week of
* this month. (This might be in the last month)
*/
if (weekstart == 0)
firstm = first - (weekday(first) + 1) % 7;
else
firstm = first - weekday(first);
/* Set ds (daystring) and dw (daywidth) according to the jd_flag. */
if (jd_flag) {
ds = jdaystr;
dw = 4;
} else {
ds = daystr;
dw = 3;
}
/*
* Fill the lines with day of month or day of year (julian day)
* line index: i, each line is one weekday. column index: j, each
* column is one day number. print column index: k.
*/
for (i = 0; i != 7; i++) {
for (j = firstm + i, k = 0; j < last; j += 7, k += dw) {
if (j >= first) {
if (jd_flag)
dt.d = j - jan1 + 1;
else
sdater(j, &dt);
if (j == highlightdate && isatty(STDOUT_FILENO)) {
mvaddstr(line+i, col+k-1, " ");
attron(A_REVERSE);
printw("%-.*s", dw-1, ds + dt.d * dw + 1);
attroff(A_REVERSE);
}
else {
mvprintw(line+i, col+k-1, "%-.*s", dw, ds + dt.d * dw);
}
} else {
mvprintw(line+i, col+k-1, "%-.*s", dw, " ");
}
}
}
}
static void
printweeknumber(int line, int y, int m, int jd_flag)
{
date dt; /* handy date */
int dw; /* width of numbers */
int first; /* first day of month */
int firstm; /* first day of first week of month */
int i, j, k; /* just indices */
int last; /* the first day of next month */
int jan1 = 0; /* the first day of this year */
char *ds; /* pointer to day strings (daystr or
* jdaystr) */
/*
* Set first and last to the day number of the first day of this
* month and the first day of next month respectively. Set jan1 to
* the day number of the first day of this year.
*/
first = firstday(y, m + 1);
if (m == 11)
last = firstday(y + 1, 1);
else
last = firstday(y, m + 2);
if (jd_flag)
jan1 = firstday(y, 1);
/*
* Set firstm to the day number of the day starting the first week of
* this month. (This might be in the last month)
*/
if (weekstart == 0)
firstm = first - (weekday(first) + 1) % 7;
else
firstm = first - weekday(first);
/* Set ds (daystring) and dw (daywidth) according to the jd_flag. */
if (jd_flag) {
ds = jdaystr;
dw = 4;
} else {
ds = daystr;
dw = 3;
}
if (flag_weeks) {
for (j = firstm, k = 0; j < last; k += dw, j += 7)
if (j <= nswitch)
printw("%-.*s", dw, "");
else
printw("%-.*s", dw, ds + week(j, &i)*dw);
k /= dw;
for (; k < 6; k++)
printw("%-.*s", dw, " ");
}
}
/* Print all months for the period in the range [ before .. y-m .. after ]. */
static void
printmonthb(int line, int col, int y, int m, int jd_flag, int highlightdate)
{
date dt; /* handy date */
int dw; /* width of numbers */
int first; /* first day of month */
int firsts; /* first day of first week of month */
int i, j, k; /* just indices */
int jan1 = 0; /* the first day of this year */
int last; /* the first day of next month */
char *ds; /* pointer to day strings (daystr or
* jdaystr) */
/* Set ds (daystring) and dw (daywidth) according to the jd_flag */
if (jd_flag) {
ds = jdaystr;
dw = 4;
} else {
ds = daystr;
dw = 3;
}
/*
* Set first and last to the day number of the first day of this
* month and the first day of next month respectively. Set jan1 to
* the day number of Jan 1st of this year.
*/
dt.y = y;
dt.m = m + 1;
dt.d = 1;
first = sndaysb(&dt);
if (m == 11) {
dt.y = y + 1;
dt.m = 1;
dt.d = 1;
} else {
dt.y = y;
dt.m = m + 2;
dt.d = 1;
}
last = sndaysb(&dt);
if (jd_flag) {
dt.y = y;
dt.m = 1;
dt.d = 1;
jan1 = sndaysb(&dt);
}
/*
* Set firsts to the day number of the day starting the first week of
* this month. (This might be in the last month)
*/
if (weekstart == 1)
firsts = first - (weekday(first)+1) % 7;
else
firsts = first - weekday(first);
/* undo the shift from ncal_backward to correct week number assignment */
weekstart--;
/*
* Fill the lines with day of month or day of year (Julian day)
* line index: i, each line is one week. column index: j, each
* column is one day number. print column index: k.
*/
for (i = 0; i != 6; i++) {
for (j = firsts + 7 * i, k = 0; j < last && k != dw * 7;
j++, k += dw) {
if (j >= first) {
if (jd_flag)
dt.d = j - jan1 + 1;
else
sdateb(j, &dt);
if (j == highlightdate) {
attron(A_REVERSE);
mvprintw(line+i, col+k, "%-.*s", dw-1, ds + dt.d*dw + 1);
attroff(A_REVERSE);
}
else {
mvprintw(line+i, col+k, "%-.*s", dw-1, ds + dt.d*dw + 1);
}
} else {
mvprintw(line+i, col+k, "%-.*s", dw, " ");
}
}
}
/* redo the shift from ncal_backward to correct week number assignment */
weekstart++;
}
static void
processkeyb(int key, int y, int m, int jd_flag, int before, int after, int *highlightdate)
{
struct weekdays wds;
char s[MAX_WIDTH], t[MAX_WIDTH];
wchar_t ws[MAX_WIDTH], ws1[MAX_WIDTH];
const char *wdss;
int i, j;
int mpl;
int mw;
int m1, m2;
int printyearheader;
int prevyear = -1;
mpl = jd_flag ? 2 : 3;
mw = jd_flag ? MONTH_WIDTH_B_J : (flag_weeks ? MONTH_WIDTH_B_WW : MONTH_WIDTH_B_NW );
wdss = (mpl == 2) ? " " : "";
while (before > 0) {
DECREASEMONTH(m, y);
before--;
after++;
}
while (before < 0) {
INCREASEMONTH(m, y);
before++;
after--;
}
m1 = y * 12 + m - 1;
m2 = m1 + after;
switch (key) {
case KEY_UP:
*highlightdate -= 7;
break;
case KEY_DOWN:
*highlightdate += 7;
break;
case KEY_LEFT:
(*highlightdate)--;
break;
case KEY_RIGHT:
(*highlightdate)++;
break;
}
}
static void
processkeyr(int key, int y, int m, int jd_flag, int before, int after, int *highlightdate)
{
struct weekdays wds;
char s[MAX_WIDTH], t[MAX_WIDTH];
int i, j;
int mpl;
int mw;
int m1, m2;
int prevyear = -1;
int printyearheader;
mpl = jd_flag ? 3 : 4;
mw = jd_flag ? MONTH_WIDTH_R_J : MONTH_WIDTH_R;
while (before > 0) {
DECREASEMONTH(m, y);
before--;
after++;
}
while (before < 0) {
INCREASEMONTH(m, y);
before++;
after--;
}
m1 = y * 12 + m - 1;
m2 = m1 + after;
switch (key) {
case KEY_UP:
(*highlightdate)--;
break;
case KEY_DOWN:
(*highlightdate)++;
break;
case KEY_LEFT:
*highlightdate -= 7;
break;
case KEY_RIGHT:
*highlightdate += 7;
break;
}
}
/* Put the local names of weekdays into the wds. */
static void
mkweekdays(struct weekdays *wds)
{
int i, len, width = 0;
struct tm tm;
wchar_t buf[20];
memset(&tm, 0, sizeof(tm));
for (i = 0; i != 7; i++) {
tm.tm_wday = (i+weekstart) % 7;
wcsftime(buf, sizeof(buf)/sizeof(buf[0]), L"%a", &tm);
for (len = 2; len > 0; --len) {
if ((width = wcswidth(buf, len)) <= 2)
break;
}
wmemset(wds->names[i], L'\0', 4);
if (width == 1)
wds->names[i][0] = L' ';
wcsncat(wds->names[i], buf, len);
wcsncat(wds->names[i], L" ", 1);
}
}
/*
* Compute the day number of the first existing date after the first day in
* month. (the first day in month and even the month might not exist!)
*/
static int
firstday(int y, int m)
{
date dt;
int nd;
dt.y = y;
dt.m = m;
dt.d = 1;
nd = sndaysr(&dt);
for (;;) {
sdater(nd, &dt);
if ((dt.m >= m && dt.y == y) || dt.y > y)
return (nd);
else
nd++;
}
/* NEVER REACHED */
}
/*
* Compute the number of days from date, obey the local switch from
* Julian to Gregorian if specified by the user.
*/
static int
sndaysr(struct date *d)
{
if (nswitch != 0)
if (nswitch < ndaysj(d))
return (ndaysg(d));
else
return (ndaysj(d));
else
return ndaysg(d);
}
/*
* Compute the number of days from date, obey the switch from
* Julian to Gregorian as used by UK and her colonies.
*/
static int
sndaysb(struct date *d)
{
if (nswitchb < ndaysj(d))
return (ndaysg(d));
else
return (ndaysj(d));
}
/* Inverse of sndays. */
static struct date *
sdater(int nd, struct date *d)
{
if (nswitch < nd)
return (gdate(nd, d));
else
return (jdate(nd, d));
}
/* Inverse of sndaysb. */
static struct date *
sdateb(int nd, struct date *d)
{
if (nswitchb < nd)
return (gdate(nd, d));
else
return (jdate(nd, d));
}
/* Print string s centered between columns start and end. */
static void
printcentered(int line, char *s, int start, int end)
{
mvaddstr(line, start + (end - start - strlen(s))/2, s);
}
/* Center string t in string s of length w by putting enough leading blanks. */
static wchar_t *
wcenter(wchar_t *s, wchar_t *t, int w)
{
char blanks[MAX_WIDTH];
memset(blanks, ' ', sizeof(blanks));
swprintf(s, MAX_WIDTH, L"%.*s%ls", (int)(w - wcslen(t)) / 2, blanks, t);
return (s);
}
static int
parsemonth(const char *s, int *m, int *y)
{
int nm, ny;
char *cp;
struct tm tm;
nm = (int)strtol(s, &cp, 10);
if (cp != s) {
ny = *y;
if (*cp == '\0') {
; /* no special action */
} else if (*cp == 'f' || *cp == 'F') {
if (nm <= *m)
ny++;
} else if (*cp == 'p' || *cp == 'P') {
if (nm >= *m)
ny--;
} else
return (1);
if (nm < 1 || nm > 12)
return 1;
*m = nm;
*y = ny;
return (0);
}
if (strptime(s, "%B", &tm) != NULL || strptime(s, "%b", &tm) != NULL) {
*m = tm.tm_mon + 1;
return (0);
}
return (1);
}
static void
highlight(char *dst, char *src, int len, int *extralen)
{
static int first = 1;
static const char *term_so, *term_se;
if (first) {
static char cbuf[512];
char tbuf[1024], *b;
term_se = term_so = NULL;
/* On how to highlight on this type of terminal (if any). */
if (isatty(STDOUT_FILENO) && tgetent(tbuf, NULL) == 1) {
b = cbuf;
term_so = tgetstr("so", &b);
term_se = tgetstr("se", &b);
}
first = 0;
}
/*
* If it is a real terminal, use the data from the termcap database.
*/
if (term_so != NULL && term_se != NULL) {
/* separator. */
dst[0] = ' ';
dst++;
/* highlight on. */
memcpy(dst, term_so, strlen(term_so));
dst += strlen(term_so);
/* the actual text. (minus leading space) */
len--;
src++;
memcpy(dst, src, len);
dst += len;
/* highlight off. */
memcpy(dst, term_se, strlen(term_se));
*extralen += strlen(term_so) + strlen(term_se);
return;
}
/*
* Otherwise, print a _, backspace and the letter.
*/
*extralen = 0;
/* skip leading space. */
src++;
len--;
/* separator. */
dst[0] = ' ';
dst++;
while (len > 0) {
/* _ and backspace. */
memcpy(dst, "_\010", 2);
dst += 2;
*extralen += 2;
/* the character. */
*dst++ = *src++;
len--;
}
return;
}
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