1 /* 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 35 #include <ctype.h> 36 #include <locale.h> 37 #include <stdio.h> 38 #include <string.h> 39 #include <sys/types.h> 40 #include <time.h> 41 #include <sys/uio.h> 42 #include <string.h> 43 #include <stdlib.h> 44 45 #include "pathnames.h" 46 #include "calendar.h" 47 48 struct tm *tp; 49 int *cumdays, offset, yrdays; 50 char dayname[10]; 51 52 53 /* 1-based month, 0-based days, cumulative */ 54 int daytab[][14] = { 55 { 0, -1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364 }, 56 { 0, -1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, 57 }; 58 59 static char *days[] = { 60 "sun", "mon", "tue", "wed", "thu", "fri", "sat", NULL, 61 }; 62 63 static char *months[] = { 64 "jan", "feb", "mar", "apr", "may", "jun", 65 "jul", "aug", "sep", "oct", "nov", "dec", NULL, 66 }; 67 68 static struct fixs fndays[8]; /* full national days names */ 69 static struct fixs ndays[8]; /* short national days names */ 70 71 static struct fixs fnmonths[13]; /* full national months names */ 72 static struct fixs nmonths[13]; /* short national month names */ 73 74 75 void setnnames(void) 76 { 77 char buf[80]; 78 int i, l; 79 struct tm tm; 80 81 for (i = 0; i < 7; i++) { 82 tm.tm_wday = i; 83 strftime(buf, sizeof(buf), "%a", &tm); 84 for (l = strlen(buf); 85 l > 0 && isspace((unsigned char)buf[l - 1]); 86 l--) 87 ; 88 buf[l] = '\0'; 89 if (ndays[i].name != NULL) 90 free(ndays[i].name); 91 ndays[i].name = strdup(buf); 92 ndays[i].len = strlen(buf); 93 94 strftime(buf, sizeof(buf), "%A", &tm); 95 for (l = strlen(buf); 96 l > 0 && isspace((unsigned char)buf[l - 1]); 97 l--) 98 ; 99 buf[l] = '\0'; 100 if (fndays[i].name != NULL) 101 free(fndays[i].name); 102 fndays[i].name = strdup(buf); 103 fndays[i].len = strlen(buf); 104 } 105 106 for (i = 0; i < 12; i++) { 107 tm.tm_mon = i; 108 strftime(buf, sizeof(buf), "%b", &tm); 109 for (l = strlen(buf); 110 l > 0 && isspace((unsigned char)buf[l - 1]); 111 l--) 112 ; 113 buf[l] = '\0'; 114 if (nmonths[i].name != NULL) 115 free(nmonths[i].name); 116 nmonths[i].name = strdup(buf); 117 nmonths[i].len = strlen(buf); 118 119 strftime(buf, sizeof(buf), "%B", &tm); 120 for (l = strlen(buf); 121 l > 0 && isspace((unsigned char)buf[l - 1]); 122 l--) 123 ; 124 buf[l] = '\0'; 125 if (fnmonths[i].name != NULL) 126 free(fnmonths[i].name); 127 fnmonths[i].name = strdup(buf); 128 fnmonths[i].len = strlen(buf); 129 } 130 } 131 132 void 133 settime(now) 134 time_t now; 135 { 136 tp = localtime(&now); 137 if ( isleap(tp->tm_year + 1900) ) { 138 yrdays = 366; 139 cumdays = daytab[1]; 140 } else { 141 yrdays = 365; 142 cumdays = daytab[0]; 143 } 144 /* Friday displays Monday's events */ 145 offset = tp->tm_wday == 5 ? 3 : 1; 146 header[5].iov_base = dayname; 147 148 (void) setlocale(LC_TIME, "C"); 149 header[5].iov_len = strftime(dayname, sizeof(dayname), "%A", tp); 150 (void) setlocale(LC_TIME, ""); 151 152 setnnames(); 153 } 154 155 /* convert Day[/Month][/Year] into unix time (since 1970) 156 * Day: two digits, Month: two digits, Year: digits 157 */ 158 time_t Mktime (date) 159 char *date; 160 { 161 time_t t; 162 int len; 163 struct tm tm; 164 165 (void)time(&t); 166 tp = localtime(&t); 167 168 len = strlen(date); 169 tm.tm_sec = 0; 170 tm.tm_min = 0; 171 tm.tm_hour = 0; 172 tm.tm_wday = 0; 173 tm.tm_mday = tp->tm_mday; 174 tm.tm_mon = tp->tm_mon; 175 tm.tm_year = tp->tm_year; 176 177 178 /* day */ 179 *(date+2) = NULL; 180 tm.tm_mday = atoi(date); 181 182 /* month */ 183 if (len >= 4) { 184 *(date+5) = NULL; 185 tm.tm_mon = atoi(date+3) - 1; 186 } 187 188 /* Year */ 189 if (len >= 7) { 190 tm.tm_year = atoi(date+6); 191 192 /* tm_year up 1900 ... */ 193 if (tm.tm_year > 1900) 194 tm.tm_year -= 1900; 195 } 196 197 #if DEBUG 198 printf("Mktime: %d %d %d %s\n", (int)mktime(&tm), (int)t, len, 199 asctime(&tm)); 200 #endif 201 return(mktime(&tm)); 202 } 203 204 /* 205 * Possible date formats include any combination of: 206 * 3-charmonth (January, Jan, Jan) 207 * 3-charweekday (Friday, Monday, mon.) 208 * numeric month or day (1, 2, 04) 209 * 210 * Any character may separate them, or they may not be separated. Any line, 211 * following a line that is matched, that starts with "whitespace", is shown 212 * along with the matched line. 213 */ 214 int 215 isnow(endp, monthp, dayp, varp) 216 char *endp; 217 int *monthp; 218 int *dayp; 219 int *varp; 220 { 221 int day, flags, month = 0, v1, v2; 222 223 /* 224 * CONVENTION 225 * 226 * Month: 1-12 227 * Monthname: Jan .. Dec 228 * Day: 1-31 229 * Weekday: Mon-Sun 230 * 231 */ 232 233 flags = 0; 234 235 /* read first field */ 236 /* didn't recognize anything, skip it */ 237 if (!(v1 = getfield(endp, &endp, &flags))) 238 return (0); 239 240 /* Easter or Easter depending days */ 241 if (flags & F_EASTER) 242 day = v1 - 1; /* days since January 1 [0-365] */ 243 244 /* 245 * 1. {Weekday,Day} XYZ ... 246 * 247 * where Day is > 12 248 */ 249 else if (flags & F_ISDAY || v1 > 12) { 250 251 /* found a day; day: 1-31 or weekday: 1-7 */ 252 day = v1; 253 254 /* {Day,Weekday} {Month,Monthname} ... */ 255 /* if no recognizable month, assume just a day alone 256 * in other words, find month or use current month */ 257 if (!(month = getfield(endp, &endp, &flags))) 258 month = tp->tm_mon + 1; 259 } 260 261 /* 2. {Monthname} XYZ ... */ 262 else if (flags & F_ISMONTH) { 263 month = v1; 264 265 /* Monthname {day,weekday} */ 266 /* if no recognizable day, assume the first day in month */ 267 if (!(day = getfield(endp, &endp, &flags))) 268 day = 1; 269 } 270 271 /* Hm ... */ 272 else { 273 v2 = getfield(endp, &endp, &flags); 274 275 /* 276 * {Day} {Monthname} ... 277 * where Day <= 12 278 */ 279 if (flags & F_ISMONTH) { 280 day = v1; 281 month = v2; 282 *varp = 0; 283 } 284 285 /* {Month} {Weekday,Day} ... */ 286 else { 287 /* F_ISDAY set, v2 > 12, or no way to tell */ 288 month = v1; 289 /* if no recognizable day, assume the first */ 290 day = v2 ? v2 : 1; 291 *varp = 0; 292 } 293 } 294 295 /* convert Weekday into *next* Day, 296 * e.g.: 'Sunday' -> 22 297 * 'SunayLast' -> ?? 298 */ 299 if (flags & F_ISDAY) { 300 #if DEBUG 301 fprintf(stderr, "\nday: %d %s month %d\n", day, endp, month); 302 #endif 303 304 *varp = 1; 305 /* variable weekday, SundayLast, MondayFirst ... */ 306 if (day < 0 || day >= 10) { 307 308 /* negative offset; last, -4 .. -1 */ 309 if (day < 0) { 310 v1 = day/10 - 1; /* offset -4 ... -1 */ 311 day = 10 + (day % 10); /* day 1 ... 7 */ 312 313 /* day, eg '22th' */ 314 v2 = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7); 315 316 /* (month length - day) / 7 + 1 */ 317 if (((int)((cumdays[month+1] - 318 cumdays[month] - v2) / 7) + 1) == -v1) 319 /* bingo ! */ 320 day = v2; 321 322 /* set to yesterday */ 323 else 324 day = tp->tm_mday - 1; 325 } 326 327 /* first, second ... +1 ... +5 */ 328 else { 329 v1 = day/10; /* offset: +1 (first Sunday) ... */ 330 day = day % 10; 331 332 /* day, eg '22th' */ 333 v2 = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7); 334 335 /* Hurrah! matched */ 336 if ( ((v2 - 1 + 7) / 7) == v1 ) 337 day = v2; 338 339 /* set to yesterday */ 340 else 341 day = tp->tm_mday - 1; 342 } 343 } 344 345 /* wired */ 346 else { 347 day = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7); 348 *varp = 1; 349 } 350 } 351 352 if (!(flags & F_EASTER)) { 353 *monthp = month; 354 *dayp = day; 355 day = cumdays[month] + day; 356 } 357 else { 358 for (v1 = 0; day > cumdays[v1]; v1++) 359 ; 360 *monthp = v1 - 1; 361 *dayp = day - cumdays[v1 - 1]; 362 *varp = 1; 363 } 364 365 #if DEBUG 366 fprintf(stderr, "day2: day %d(%d) yday %d\n", *dayp, day, tp->tm_yday); 367 #endif 368 /* if today or today + offset days */ 369 if (day >= tp->tm_yday - f_dayBefore && 370 day <= tp->tm_yday + offset + f_dayAfter) 371 return (1); 372 373 /* if number of days left in this year + days to event in next year */ 374 if (yrdays - tp->tm_yday + day <= offset + f_dayAfter || 375 /* a year backward, eg. 6 Jan and 10 days before -> 27. Dec */ 376 tp->tm_yday + day - f_dayBefore < 0 377 ) 378 return (1); 379 return (0); 380 } 381 382 383 int 384 getmonth(s) 385 register char *s; 386 { 387 register char **p; 388 struct fixs *n; 389 390 for (n = fnmonths; n->name; ++n) 391 if (!strncasecmp(s, n->name, n->len)) 392 return ((n - fnmonths) + 1); 393 for (n = nmonths; n->name; ++n) 394 if (!strncasecmp(s, n->name, n->len)) 395 return ((n - nmonths) + 1); 396 for (p = months; *p; ++p) 397 if (!strncasecmp(s, *p, 3)) 398 return ((p - months) + 1); 399 return (0); 400 } 401 402 403 int 404 getday(s) 405 register char *s; 406 { 407 register char **p; 408 struct fixs *n; 409 410 for (n = fndays; n->name; ++n) 411 if (!strncasecmp(s, n->name, n->len)) 412 return ((n - fndays) + 1); 413 for (n = ndays; n->name; ++n) 414 if (!strncasecmp(s, n->name, n->len)) 415 return ((n - ndays) + 1); 416 for (p = days; *p; ++p) 417 if (!strncasecmp(s, *p, 3)) 418 return ((p - days) + 1); 419 return (0); 420 } 421 422 /* return offset for variable weekdays 423 * -1 -> last weekday in month 424 * +1 -> first weekday in month 425 * ... etc ... 426 */ 427 int 428 getdayvar(s) 429 register char *s; 430 { 431 register int offset; 432 433 434 offset = strlen(s); 435 436 437 /* Sun+1 or Wednesday-2 438 * ^ ^ */ 439 440 /* printf ("x: %s %s %d\n", s, s + offset - 2, offset); */ 441 switch(*(s + offset - 2)) { 442 case '-': 443 return(-(atoi(s + offset - 1))); 444 break; 445 case '+': 446 return(atoi(s + offset - 1)); 447 break; 448 } 449 450 451 /* 452 * some aliases: last, first, second, third, fourth 453 */ 454 455 /* last */ 456 if (offset > 4 && !strcasecmp(s + offset - 4, "last")) 457 return(-1); 458 else if (offset > 5 && !strcasecmp(s + offset - 5, "first")) 459 return(+1); 460 else if (offset > 6 && !strcasecmp(s + offset - 6, "second")) 461 return(+2); 462 else if (offset > 5 && !strcasecmp(s + offset - 5, "third")) 463 return(+3); 464 else if (offset > 6 && !strcasecmp(s + offset - 6, "fourth")) 465 return(+4); 466 467 468 /* no offset detected */ 469 return(0); 470 } 471