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freebsd-dev/usr.bin/ncal/ncal.c
Warner Losh 6feb6b4ffc ncal: LT is the country code for Lithuania 
PR: 265479
MFC After: 3 days
2022-07-28 11:35:50 -06:00

1180 lines
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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>
__FBSDID("$FreeBSD$");
#include <calendar.h>
#include <ctype.h>
#include <err.h>
#include <langinfo.h>
#include <libgen.h>
#include <locale.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 20
#define MONTH_WIDTH_R_J 24
#define MONTH_WIDTH_R 18
#define MAX_WIDTH 64
typedef struct date date;
struct monthlines {
wchar_t name[MAX_WIDTH + 1];
char lines[7][MAX_WIDTH + 1];
char weeks[MAX_WIDTH + 1];
unsigned int extralen[7];
};
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, 31}},
{"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}},
{"LT", "Lithuania", {1918, 2, 1}},
{"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_nohighlight; /* user doesn't want a highlighted today */
static int flag_weeks; /* user wants number of week */
static int nswitch; /* user defined switch date */
static int nswitchb; /* switch date for backward compatibility */
static int highlightdate;
static char *center(char *s, char *t, int w);
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 mkmonthr(int year, int month, int jd_flag,
struct monthlines * monthl);
static void mkmonthb(int year, int month, int jd_flag,
struct monthlines * monthl);
static void mkweekdays(struct weekdays * wds);
static void monthranger(int year, int m, int jd_flag,
int before, int after);
static void monthrangeb(int year, int m, int jd_flag,
int before, int after);
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 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_after = 0; /* user wants to see months after */
int flag_before = 0; /* user wants to see months before */
int flag_specifiedmonth = 0;/* user wants to see this month (-m) */
int flag_givenmonth = 0; /* user has specified month [n] */
int flag_givenyear = 0; /* user has specified year [n] */
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 before, after;
const char *locale; /* locale to get country code */
flag_nohighlight = 0;
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, "3A:B:Cd:eH:hjJm:Nops:wy")) != -1)
switch (ch) {
case '3':
flag_3months = 1;
break;
case 'A':
if (flag_after > 0)
errx(EX_USAGE, "Double -A specified");
flag_after = strtol(optarg, NULL, 10);
if (flag_after <= 0)
errx(EX_USAGE,
"Argument to -A must be positive");
break;
case 'B':
if (flag_before > 0)
errx(EX_USAGE, "Double -A specified");
flag_before = strtol(optarg, NULL, 10);
if (flag_before <= 0)
errx(EX_USAGE,
"Argument to -B must be positive");
break;
case 'J':
if (flag_backward)
usage();
nswitch = ndaysj(&never);
flag_julian_cal = 1;
break;
case 'C':
flag_backward = 1;
break;
case 'N':
flag_backward = 0;
break;
case 'd':
flag_today = optarg;
break;
case 'H':
flag_highlightdate = optarg;
break;
case 'h':
flag_nohighlight = 1;
break;
case 'e':
if (flag_backward)
usage();
flag_easter = 1;
break;
case 'j':
flag_julian_day = 1;
break;
case 'm':
if (flag_specifiedmonth)
errx(EX_USAGE, "Double -m specified");
flag_month = optarg;
flag_specifiedmonth = 1;
break;
case 'o':
if (flag_backward)
usage();
flag_orthodox = 1;
flag_easter = 1;
break;
case 'p':
if (flag_backward)
usage();
printcc();
return (0);
break;
case 's':
if (flag_backward)
usage();
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();
flag_weeks = 1;
break;
case 'y':
flag_wholeyear = 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 = atoi(*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();
}
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);
}
}
/*
* What is not supported:
* -3 with -A or -B
* -3 displays 3 months, -A and -B change that behaviour.
* -3 with -y
* -3 displays 3 months, -y says display a whole year.
* -3 with a given year but no given month or without -m
* -3 displays 3 months, no month specified doesn't make clear
* which three months.
* -m with a given month
* conflicting arguments, both specify the same field.
* -y with -m
* -y displays the whole year, -m displays a single month.
* -y with a given month
* -y displays the whole year, the given month displays a single
* month.
* -y with -A or -B
* -y displays the whole year, -A and -B display extra months.
*/
/* -3 together with -A or -B. */
if (flag_3months && (flag_after || flag_before))
errx(EX_USAGE, "-3 together with -A and -B is not supported.");
/* -3 together with -y. */
if (flag_3months && flag_wholeyear)
errx(EX_USAGE, "-3 together with -y is not supported.");
/* -3 together with givenyear but no givenmonth. */
if (flag_3months && flag_givenyear &&
!(flag_givenmonth || flag_specifiedmonth))
errx(EX_USAGE,
"-3 together with a given year but no given month is "
"not supported.");
/* -m together with xx xxxx. */
if (flag_specifiedmonth && flag_givenmonth)
errx(EX_USAGE,
"-m together with a given month is not supported.");
/* -y together with -m. */
if (flag_wholeyear && flag_specifiedmonth)
errx(EX_USAGE, "-y together with -m is not supported.");
/* -y together with xx xxxx. */
if (flag_wholeyear && flag_givenmonth)
errx(EX_USAGE, "-y together a given month is not supported.");
/* -y together with -A or -B. */
if (flag_wholeyear && (flag_before > 0 || flag_after > 0))
errx(EX_USAGE, "-y together a -A or -B is not supported.");
/* The rest should be fine. */
/* Select the period to display, in order of increasing priority .*/
if (flag_wholeyear ||
(flag_givenyear && !(flag_givenmonth || flag_specifiedmonth))) {
m = 1;
before = 0;
after = 11;
}
if (flag_givenyear && flag_givenmonth) {
before = 0;
after = 0;
}
if (flag_specifiedmonth) {
before = 0;
after = 0;
}
if (flag_before) {
before = flag_before;
}
if (flag_after) {
after = flag_after;
}
if (flag_3months) {
before = 1;
after = 1;
}
if (after == -1)
after = 0;
if (before == -1)
before = 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
if (flag_backward)
monthrangeb(y, m, flag_julian_day, before, after);
else
monthranger(y, m, flag_julian_day, before, after);
return (0);
}
static void
usage(void)
{
fputs(
"Usage: cal [general options] [-hjy] [[month] year]\n"
" cal [general options] [-hj] [-m month] [year]\n"
" ncal [general options] [-hJjpwy] [-s country_code] [[month] year]\n"
" ncal [general options] [-hJeo] [year]\n"
"General options: [-NC3] [-A months] [-B months]\n"
"For debug the highlighting: [-H yyyy-mm-dd] [-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 "%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++)
printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m));
if (m != n)
printf(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];
static int d_first = -1;
if (d_first < 0)
d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
/* 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), d_first ? "%e %B %Y" : "%B %e %Y", &tm);
printf("%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)
/* 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)
{
struct monthlines year[12];
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 : MONTH_WIDTH_B;
wdss = (mpl == 2) ? " " : "";
while (before != 0) {
DECREASEMONTH(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) {
int count = 0;
for (i = 0; i != mpl && m + i <= m2; i++) {
mkmonthb(M2Y(m + i), M2M(m + i) - 1, jd_flag, year + i);
count++;
}
/* Empty line between two rows of months */
if (m != m1)
printf("\n");
/* Year at the top. */
if (printyearheader && M2Y(m) != prevyear) {
sprintf(s, "%d", M2Y(m));
printf("%s\n", center(t, s, mpl * mw));
prevyear = M2Y(m);
}
/* Month names. */
for (i = 0; i < count; i++)
if (printyearheader)
wprintf(L"%-*ls ",
mw, wcenter(ws, year[i].name, mw));
else {
swprintf(ws, sizeof(ws)/sizeof(ws[0]),
L"%-ls %d", year[i].name, M2Y(m + i));
wprintf(L"%-*ls ", mw, wcenter(ws1, ws, mw));
}
printf("\n");
/* Day of the week names. */
for (i = 0; i < count; i++) {
wprintf(L"%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]);
}
printf("\n");
/* And the days of the month. */
for (i = 0; i != 6; i++) {
for (j = 0; j < count; j++)
printf("%-*s ",
MW(mw, year[j].extralen[i]),
year[j].lines[i]+1);
printf("\n");
}
m += mpl;
}
}
static void
monthranger(int y, int m, int jd_flag, int before, int after)
{
struct monthlines year[12];
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++;
}
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) {
int count = 0;
for (i = 0; i != mpl && m + i <= m2; i++) {
mkmonthr(M2Y(m + i), M2M(m + i) - 1, jd_flag, year + i);
count++;
}
/* Empty line between two rows of months. */
if (m != m1)
printf("\n");
/* Year at the top. */
if (printyearheader && M2Y(m) != prevyear) {
sprintf(s, "%d", M2Y(m));
printf("%s\n", center(t, s, mpl * mw));
prevyear = M2Y(m);
}
/* Month names. */
wprintf(L" ");
for (i = 0; i < count; i++)
if (printyearheader)
wprintf(L"%-*ls", mw, year[i].name);
else
wprintf(L"%-ls %-*d", year[i].name,
mw - wcslen(year[i].name) - 1, M2Y(m + i));
printf("\n");
/* And the days of the month. */
for (i = 0; i != 7; i++) {
/* Week day */
wprintf(L"%.2ls", wds.names[i]);
/* Full months */
for (j = 0; j < count; j++)
printf("%-*s",
MW(mw, year[j].extralen[i]),
year[j].lines[i]);
printf("\n");
}
/* Week numbers. */
if (flag_weeks) {
printf(" ");
for (i = 0; i < count; i++)
printf("%-*s", mw, year[i].weeks);
printf("\n");
}
m += mpl;
}
return;
}
static void
mkmonthr(int y, int m, int jd_flag, struct monthlines *mlines)
{
struct tm tm; /* for strftime printing local names of
* months */
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, l; /* 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 name of month. */
memset(&tm, 0, sizeof(tm));
tm.tm_mon = m;
wcsftime(mlines->name, sizeof(mlines->name) / sizeof(mlines->name[0]),
L"%OB", &tm);
mlines->name[0] = towupper(mlines->name[0]);
/*
* 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 monday of the first week of
* this month. (This might be in the last month)
*/
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++) {
l = 0;
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 && !flag_nohighlight
&& isatty(STDOUT_FILENO))
highlight(mlines->lines[i] + k,
ds + dt.d * dw, dw, &l);
else
memcpy(mlines->lines[i] + k + l,
ds + dt.d * dw, dw);
} else
memcpy(mlines->lines[i] + k + l, " ", dw);
}
mlines->lines[i][k + l] = '\0';
mlines->extralen[i] = l;
}
/* fill the weeknumbers. */
if (flag_weeks) {
for (j = firstm, k = 0; j < last; k += dw, j += 7)
if (j <= nswitch)
memset(mlines->weeks + k, ' ', dw);
else
memcpy(mlines->weeks + k,
ds + week(j, &i)*dw, dw);
mlines->weeks[k] = '\0';
}
}
static void
mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines)
{
struct tm tm; /* for strftime printing local names of
* months */
date dt; /* handy date */
int dw; /* width of numbers */
int first; /* first day of month */
int firsts; /* sunday of first week of month */
int i, j, k, l; /* 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 name of month centered. */
memset(&tm, 0, sizeof(tm));
tm.tm_mon = m;
wcsftime(mlines->name, sizeof(mlines->name) / sizeof(mlines->name[0]),
L"%OB", &tm);
mlines->name[0] = towupper(mlines->name[0]);
/*
* 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 sunday of the first week of
* this month. (This might be in the last month)
*/
firsts = first - (weekday(first)+1) % 7;
/*
* 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++) {
l = 0;
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 && !flag_nohighlight)
highlight(mlines->lines[i] + k,
ds + dt.d * dw, dw, &l);
else
memcpy(mlines->lines[i] + k + l,
ds + dt.d * dw, dw);
} else
memcpy(mlines->lines[i] + k + l, " ", dw);
}
if (k == 0)
mlines->lines[i][1] = '\0';
else
mlines->lines[i][k + l] = '\0';
mlines->extralen[i] = l;
}
}
/* 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+1) % 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));
}
/* Center string t in string s of length w by putting enough leading blanks. */
static char *
center(char *s, char *t, int w)
{
char blanks[MAX_WIDTH];
memset(blanks, ' ', sizeof(blanks));
sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t);
return (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;
}
/*
* This check is not necessary, should have been handled before calling
* this function.
*/
if (flag_nohighlight) {
memcpy(dst, src, len);
return;
}
/*
* 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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