?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
*** empty log message ***
[glibc/history.git] / time / zic.c
bloba0dc5f6bbdc3a03d04195b97040ab82dad5159af
1 #ifndef lint
2 #ifndef NOID
3 static char elsieid[] = "@(#)zic.c 7.22";
4 #endif /* !defined NOID */
5 #endif /* !defined lint */
6
7 #include "private.h"
8 #include "tzfile.h"
9
10 struct rule {
11 const char * r_filename;
12 int r_linenum;
13 const char * r_name;
14
15 int r_loyear; /* for example, 1986 */
16 int r_hiyear; /* for example, 1986 */
17 const char * r_yrtype;
18
19 int r_month; /* 0..11 */
20
21 int r_dycode; /* see below */
22 int r_dayofmonth;
23 int r_wday;
24
25 long r_tod; /* time from midnight */
26 int r_todisstd; /* above is standard time if TRUE */
27 /* or wall clock time if FALSE */
28 long r_stdoff; /* offset from standard time */
29 const char * r_abbrvar; /* variable part of abbreviation */
30
31 int r_todo; /* a rule to do (used in outzone) */
32 time_t r_temp; /* used in outzone */
33 };
34
35 /*
36 ** r_dycode r_dayofmonth r_wday
37 */
38
39 #define DC_DOM 0 /* 1..31 */ /* unused */
40 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
41 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
42
43 struct zone {
44 const char * z_filename;
45 int z_linenum;
46
47 const char * z_name;
48 long z_gmtoff;
49 const char * z_rule;
50 const char * z_format;
51
52 long z_stdoff;
53
54 struct rule * z_rules;
55 int z_nrules;
56
57 struct rule z_untilrule;
58 time_t z_untiltime;
59 };
60
61 extern int emkdir P((const char * name, int mode));
62 extern int getopt P((int argc, char * argv[], const char * options));
63 extern char * icatalloc P((char * old, const char * new));
64 extern char * icpyalloc P((const char * string));
65 extern void ifree P((char * p));
66 extern char * imalloc P((int n));
67 extern char * irealloc P((char * old, int n));
68 extern int link P((const char * fromname, const char * toname));
69 extern char * optarg;
70 extern int optind;
71 extern char * scheck P((const char * string, const char * format));
72
73 static void addtt P((time_t starttime, int type));
74 static int addtype P((long gmtoff, const char * abbr, int isdst,
75 int ttisstd));
76 static void leapadd P((time_t t, int positive, int rolling, int count));
77 static void adjleap P((void));
78 static void associate P((void));
79 static int ciequal P((const char * ap, const char * bp));
80 static void convert P((long val, char * buf));
81 static void dolink P((const char * fromfile, const char * tofile));
82 static void eat P((const char * name, int num));
83 static void eats P((const char * name, int num,
84 const char * rname, int rnum));
85 static long eitol P((int i));
86 static void error P((const char * message));
87 static char ** getfields P((char * buf));
88 static long gethms P((const char * string, const char * errstrng,
89 int signable));
90 static void infile P((const char * filename));
91 static void inleap P((char ** fields, int nfields));
92 static void inlink P((char ** fields, int nfields));
93 static void inrule P((char ** fields, int nfields));
94 static int inzcont P((char ** fields, int nfields));
95 static int inzone P((char ** fields, int nfields));
96 static int inzsub P((char ** fields, int nfields, int iscont));
97 static int itsabbr P((const char * abbr, const char * word));
98 static int itsdir P((const char * name));
99 static int lowerit P((int c));
100 static char * memcheck P((char * tocheck));
101 static int mkdirs P((char * filename));
102 static void newabbr P((const char * abbr));
103 static long oadd P((long t1, long t2));
104 static void outzone P((const struct zone * zp, int ntzones));
105 static void puttzcode P((long code, FILE * fp));
106 static int rcomp P((const genericptr_t leftp, const genericptr_t rightp));
107 static time_t rpytime P((const struct rule * rp, int wantedy));
108 static void rulesub P((struct rule * rp,
109 char * loyearp, char * hiyearp,
110 char * typep, char * monthp,
111 char * dayp, char * timep));
112 static void setboundaries P((void));
113 static time_t tadd P((time_t t1, long t2));
114 static void usage P((void));
115 static void writezone P((const char * name));
116 static int yearistype P((int year, const char * type));
117
118 static int charcnt;
119 static int errors;
120 static const char * filename;
121 static int leapcnt;
122 static int linenum;
123 static int max_int;
124 static time_t max_time;
125 static int max_year;
126 static int min_int;
127 static time_t min_time;
128 static int min_year;
129 static int noise;
130 static const char * rfilename;
131 static int rlinenum;
132 static const char * progname;
133 static int timecnt;
134 static int typecnt;
135 static int tt_signed;
136
137 /*
138 ** Line codes.
139 */
140
141 #define LC_RULE 0
142 #define LC_ZONE 1
143 #define LC_LINK 2
144 #define LC_LEAP 3
145
146 /*
147 ** Which fields are which on a Zone line.
148 */
149
150 #define ZF_NAME 1
151 #define ZF_GMTOFF 2
152 #define ZF_RULE 3
153 #define ZF_FORMAT 4
154 #define ZF_TILYEAR 5
155 #define ZF_TILMONTH 6
156 #define ZF_TILDAY 7
157 #define ZF_TILTIME 8
158 #define ZONE_MINFIELDS 5
159 #define ZONE_MAXFIELDS 9
160
161 /*
162 ** Which fields are which on a Zone continuation line.
163 */
164
165 #define ZFC_GMTOFF 0
166 #define ZFC_RULE 1
167 #define ZFC_FORMAT 2
168 #define ZFC_TILYEAR 3
169 #define ZFC_TILMONTH 4
170 #define ZFC_TILDAY 5
171 #define ZFC_TILTIME 6
172 #define ZONEC_MINFIELDS 3
173 #define ZONEC_MAXFIELDS 7
174
175 /*
176 ** Which files are which on a Rule line.
177 */
178
179 #define RF_NAME 1
180 #define RF_LOYEAR 2
181 #define RF_HIYEAR 3
182 #define RF_COMMAND 4
183 #define RF_MONTH 5
184 #define RF_DAY 6
185 #define RF_TOD 7
186 #define RF_STDOFF 8
187 #define RF_ABBRVAR 9
188 #define RULE_FIELDS 10
189
190 /*
191 ** Which fields are which on a Link line.
192 */
193
194 #define LF_FROM 1
195 #define LF_TO 2
196 #define LINK_FIELDS 3
197
198 /*
199 ** Which fields are which on a Leap line.
200 */
201
202 #define LP_YEAR 1
203 #define LP_MONTH 2
204 #define LP_DAY 3
205 #define LP_TIME 4
206 #define LP_CORR 5
207 #define LP_ROLL 6
208 #define LEAP_FIELDS 7
209
210 /*
211 ** Year synonyms.
212 */
213
214 #define YR_MINIMUM 0
215 #define YR_MAXIMUM 1
216 #define YR_ONLY 2
217
218 static struct rule * rules;
219 static int nrules; /* number of rules */
220
221 static struct zone * zones;
222 static int nzones; /* number of zones */
223
224 struct link {
225 const char * l_filename;
226 int l_linenum;
227 const char * l_from;
228 const char * l_to;
229 };
230
231 static struct link * links;
232 static int nlinks;
233
234 struct lookup {
235 const char * l_word;
236 const int l_value;
237 };
238
239 static struct lookup const * byword P((const char * string,
240 const struct lookup * lp));
241
242 static struct lookup const line_codes[] = {
243 { "Rule", LC_RULE },
244 { "Zone", LC_ZONE },
245 { "Link", LC_LINK },
246 { "Leap", LC_LEAP },
247 { NULL, 0}
248 };
249
250 static struct lookup const mon_names[] = {
251 { "January", TM_JANUARY },
252 { "February", TM_FEBRUARY },
253 { "March", TM_MARCH },
254 { "April", TM_APRIL },
255 { "May", TM_MAY },
256 { "June", TM_JUNE },
257 { "July", TM_JULY },
258 { "August", TM_AUGUST },
259 { "September", TM_SEPTEMBER },
260 { "October", TM_OCTOBER },
261 { "November", TM_NOVEMBER },
262 { "December", TM_DECEMBER },
263 { NULL, 0 }
264 };
265
266 static struct lookup const wday_names[] = {
267 { "Sunday", TM_SUNDAY },
268 { "Monday", TM_MONDAY },
269 { "Tuesday", TM_TUESDAY },
270 { "Wednesday", TM_WEDNESDAY },
271 { "Thursday", TM_THURSDAY },
272 { "Friday", TM_FRIDAY },
273 { "Saturday", TM_SATURDAY },
274 { NULL, 0 }
275 };
276
277 static struct lookup const lasts[] = {
278 { "last-Sunday", TM_SUNDAY },
279 { "last-Monday", TM_MONDAY },
280 { "last-Tuesday", TM_TUESDAY },
281 { "last-Wednesday", TM_WEDNESDAY },
282 { "last-Thursday", TM_THURSDAY },
283 { "last-Friday", TM_FRIDAY },
284 { "last-Saturday", TM_SATURDAY },
285 { NULL, 0 }
286 };
287
288 static struct lookup const begin_years[] = {
289 { "minimum", YR_MINIMUM },
290 { "maximum", YR_MAXIMUM },
291 { NULL, 0 }
292 };
293
294 static struct lookup const end_years[] = {
295 { "minimum", YR_MINIMUM },
296 { "maximum", YR_MAXIMUM },
297 { "only", YR_ONLY },
298 { NULL, 0 }
299 };
300
301 static struct lookup const leap_types[] = {
302 { "Rolling", TRUE },
303 { "Stationary", FALSE },
304 { NULL, 0 }
305 };
306
307 static const int len_months[2][MONSPERYEAR] = {
308 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
309 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
310 };
311
312 static const int len_years[2] = {
313 DAYSPERNYEAR, DAYSPERLYEAR
314 };
315
316 static time_t ats[TZ_MAX_TIMES];
317 static unsigned char types[TZ_MAX_TIMES];
318 static long gmtoffs[TZ_MAX_TYPES];
319 static char isdsts[TZ_MAX_TYPES];
320 static unsigned char abbrinds[TZ_MAX_TYPES];
321 static char ttisstds[TZ_MAX_TYPES];
322 static char chars[TZ_MAX_CHARS];
323 static time_t trans[TZ_MAX_LEAPS];
324 static long corr[TZ_MAX_LEAPS];
325 static char roll[TZ_MAX_LEAPS];
326
327 /*
328 ** Memory allocation.
329 */
330
331 static char *
332 memcheck(ptr)
333 char * const ptr;
334 {
335 if (ptr == NULL) {
336 (void) perror(progname);
337 (void) exit(EXIT_FAILURE);
338 }
339 return ptr;
340 }
341
342 #define emalloc(size) memcheck(imalloc(size))
343 #define erealloc(ptr, size) memcheck(irealloc(ptr, size))
344 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
345 #define ecatalloc(oldp, newp) memcheck(icatalloc(oldp, newp))
346
347 /*
348 ** Error handling.
349 */
350
351 static void
352 eats(name, num, rname, rnum)
353 const char * const name;
354 const int num;
355 const char * const rname;
356 const int rnum;
357 {
358 filename = name;
359 linenum = num;
360 rfilename = rname;
361 rlinenum = rnum;
362 }
363
364 static void
365 eat(name, num)
366 const char * const name;
367 const int num;
368 {
369 eats(name, num, (char *) NULL, -1);
370 }
371
372 static void
373 error(string)
374 const char * const string;
375 {
376 /*
377 ** Match the format of "cc" to allow sh users to
378 ** zic ... 2>&1 | error -t "*" -v
379 ** on BSD systems.
380 */
381 (void) fprintf(stderr, "\"%s\", line %d: %s",
382 filename, linenum, string);
383 if (rfilename != NULL)
384 (void) fprintf(stderr, " (rule from \"%s\", line %d)",
385 rfilename, rlinenum);
386 (void) fprintf(stderr, "\n");
387 ++errors;
388 }
389
390 static void
391 usage()
392 {
393 (void) fprintf(stderr,
394 "%s: usage is %s [ -s ] [ -v ] [ -l localtime ] [ -p posixrules ] [ -d directory ] \n\
395 \t[ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n",
396 progname, progname);
397 (void) exit(EXIT_FAILURE);
398 }
399
400 static const char * psxrules;
401 static const char * lcltime;
402 static const char * directory;
403 static const char * leapsec;
404 static const char * yitcommand;
405 static int sflag = FALSE;
406
407 int
408 main(argc, argv)
409 int argc;
410 char * argv[];
411 {
412 register int i, j;
413 register int c;
414
415 #ifdef unix
416 (void) umask(umask(022) | 022);
417 #endif /* defined unix */
418 progname = argv[0];
419 while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF)
420 switch (c) {
421 default:
422 usage();
423 case 'd':
424 if (directory == NULL)
425 directory = optarg;
426 else {
427 (void) fprintf(stderr,
428 "%s: More than one -d option specified\n",
429 progname);
430 (void) exit(EXIT_FAILURE);
431 }
432 break;
433 case 'l':
434 if (lcltime == NULL)
435 lcltime = optarg;
436 else {
437 (void) fprintf(stderr,
438 "%s: More than one -l option specified\n",
439 progname);
440 (void) exit(EXIT_FAILURE);
441 }
442 break;
443 case 'p':
444 if (psxrules == NULL)
445 psxrules = optarg;
446 else {
447 (void) fprintf(stderr,
448 "%s: More than one -p option specified\n",
449 progname);
450 (void) exit(EXIT_FAILURE);
451 }
452 break;
453 case 'y':
454 if (yitcommand == NULL)
455 yitcommand = optarg;
456 else {
457 (void) fprintf(stderr,
458 "%s: More than one -y option specified\n",
459 progname);
460 (void) exit(EXIT_FAILURE);
461 }
462 break;
463 case 'L':
464 if (leapsec == NULL)
465 leapsec = optarg;
466 else {
467 (void) fprintf(stderr,
468 "%s: More than one -L option specified\n",
469 progname);
470 (void) exit(EXIT_FAILURE);
471 }
472 break;
473 case 'v':
474 noise = TRUE;
475 break;
476 case 's':
477 sflag = TRUE;
478 break;
479 }
480 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
481 usage(); /* usage message by request */
482 if (directory == NULL)
483 directory = TZDIR;
484 if (yitcommand == NULL)
485 yitcommand = "yearistype";
486
487 setboundaries();
488
489 if (optind < argc && leapsec != NULL) {
490 infile(leapsec);
491 adjleap();
492 }
493
494 zones = (struct zone *) emalloc(0);
495 rules = (struct rule *) emalloc(0);
496 links = (struct link *) emalloc(0);
497 for (i = optind; i < argc; ++i)
498 infile(argv[i]);
499 if (errors)
500 (void) exit(EXIT_FAILURE);
501 associate();
502 for (i = 0; i < nzones; i = j) {
503 /*
504 ** Find the next non-continuation zone entry.
505 */
506 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
507 continue;
508 outzone(&zones[i], j - i);
509 }
510 /*
511 ** Make links.
512 */
513 for (i = 0; i < nlinks; ++i)
514 dolink(links[i].l_from, links[i].l_to);
515 if (lcltime != NULL)
516 dolink(lcltime, TZDEFAULT);
517 if (psxrules != NULL)
518 dolink(psxrules, TZDEFRULES);
519 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
520 }
521
522 static void
523 dolink(fromfile, tofile)
524 const char * const fromfile;
525 const char * const tofile;
526 {
527 register char * fromname;
528 register char * toname;
529
530 if (fromfile[0] == '/')
531 fromname = fromfile;
532 else {
533 fromname = ecpyalloc(directory);
534 fromname = ecatalloc(fromname, "/");
535 fromname = ecatalloc(fromname, fromfile);
536 }
537 if (tofile[0] == '/')
538 toname = tofile;
539 else {
540 toname = ecpyalloc(directory);
541 toname = ecatalloc(toname, "/");
542 toname = ecatalloc(toname, tofile);
543 }
544 /*
545 ** We get to be careful here since
546 ** there's a fair chance of root running us.
547 */
548 if (!itsdir(toname))
549 (void) remove(toname);
550 if (link(fromname, toname) != 0) {
551 if (mkdirs(toname) != 0)
552 (void) exit(EXIT_FAILURE);
553 if (link(fromname, toname) != 0) {
554 (void) fprintf(stderr, "%s: Can't link from %s to ",
555 progname, fromname);
556 (void) perror(toname);
557 (void) exit(EXIT_FAILURE);
558 }
559 }
560 if (fromname != fromfile)
561 ifree(fromname);
562 if (toname != tofile)
563 ifree(toname);
564 }
565
566 static void
567 setboundaries()
568 {
569 register time_t bit;
570 register int bii;
571
572 for (bit = 1; bit > 0; bit <<= 1)
573 continue;
574 if (bit == 0) { /* time_t is an unsigned type */
575 tt_signed = FALSE;
576 min_time = 0;
577 max_time = ~(time_t) 0;
578 if (sflag)
579 max_time >>= 1;
580 } else {
581 tt_signed = TRUE;
582 min_time = bit;
583 max_time = bit;
584 ++max_time;
585 max_time = -max_time;
586 if (sflag)
587 min_time = 0;
588 }
589 min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
590 max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
591
592 for (bii = 1; bii > 0; bii <<= 1)
593 continue;
594 min_int = bii;
595 max_int = -1 - bii;
596 }
597
598 static int
599 itsdir(name)
600 const char * const name;
601 {
602 register char * myname;
603 register int accres;
604
605 myname = ecpyalloc(name);
606 myname = ecatalloc(myname, "/.");
607 accres = access(myname, 0);
608 ifree(myname);
609 return accres == 0;
610 }
611
612 /*
613 ** Associate sets of rules with zones.
614 */
615
616 /*
617 ** Sort by rule name.
618 */
619
620 static int
621 rcomp(cp1, cp2)
622 const genericptr_t cp1;
623 const genericptr_t cp2;
624 {
625 return strcmp(((struct rule *) cp1)->r_name,
626 ((struct rule *) cp2)->r_name);
627 }
628
629 static void
630 associate()
631 {
632 register struct zone * zp;
633 register struct rule * rp;
634 register int base, out;
635 register int i;
636
637 if (nrules != 0)
638 (void) qsort((genericptr_t) rules,
639 (qsort_size_t) nrules,
640 (qsort_size_t) sizeof *rules, rcomp);
641 for (i = 0; i < nzones; ++i) {
642 zp = &zones[i];
643 zp->z_rules = NULL;
644 zp->z_nrules = 0;
645 }
646 for (base = 0; base < nrules; base = out) {
647 rp = &rules[base];
648 for (out = base + 1; out < nrules; ++out)
649 if (strcmp(rp->r_name, rules[out].r_name) != 0)
650 break;
651 for (i = 0; i < nzones; ++i) {
652 zp = &zones[i];
653 if (strcmp(zp->z_rule, rp->r_name) != 0)
654 continue;
655 zp->z_rules = rp;
656 zp->z_nrules = out - base;
657 }
658 }
659 for (i = 0; i < nzones; ++i) {
660 zp = &zones[i];
661 if (zp->z_nrules == 0) {
662 /*
663 ** Maybe we have a local standard time offset.
664 */
665 eat(zp->z_filename, zp->z_linenum);
666 zp->z_stdoff = gethms(zp->z_rule, "unruly zone", TRUE);
667 /*
668 ** Note, though, that if there's no rule,
669 ** a '%s' in the format is a bad thing.
670 */
671 if (strchr(zp->z_format, '%') != 0)
672 error("%s in ruleless zone");
673 }
674 }
675 if (errors)
676 (void) exit(EXIT_FAILURE);
677 }
678
679 static void
680 infile(name)
681 const char * name;
682 {
683 register FILE * fp;
684 register char ** fields;
685 register char * cp;
686 register const struct lookup * lp;
687 register int nfields;
688 register int wantcont;
689 register int num;
690 char buf[BUFSIZ];
691
692 if (strcmp(name, "-") == 0) {
693 name = "standard input";
694 fp = stdin;
695 } else if ((fp = fopen(name, "r")) == NULL) {
696 (void) fprintf(stderr, "%s: Can't open ", progname);
697 (void) perror(name);
698 (void) exit(EXIT_FAILURE);
699 }
700 wantcont = FALSE;
701 for (num = 1; ; ++num) {
702 eat(name, num);
703 if (fgets(buf, (int) sizeof buf, fp) != buf)
704 break;
705 cp = strchr(buf, '\n');
706 if (cp == NULL) {
707 error("line too long");
708 (void) exit(EXIT_FAILURE);
709 }
710 *cp = '\0';
711 fields = getfields(buf);
712 nfields = 0;
713 while (fields[nfields] != NULL) {
714 static char nada[1];
715
716 if (ciequal(fields[nfields], "-"))
717 fields[nfields] = nada;
718 ++nfields;
719 }
720 if (nfields == 0) {
721 /* nothing to do */
722 } else if (wantcont) {
723 wantcont = inzcont(fields, nfields);
724 } else {
725 lp = byword(fields[0], line_codes);
726 if (lp == NULL)
727 error("input line of unknown type");
728 else switch ((int) (lp->l_value)) {
729 case LC_RULE:
730 inrule(fields, nfields);
731 wantcont = FALSE;
732 break;
733 case LC_ZONE:
734 wantcont = inzone(fields, nfields);
735 break;
736 case LC_LINK:
737 inlink(fields, nfields);
738 wantcont = FALSE;
739 break;
740 case LC_LEAP:
741 if (name != leapsec)
742 (void) fprintf(stderr,
743 "%s: Leap line in non leap seconds file %s\n",
744 progname, name);
745 else inleap(fields, nfields);
746 wantcont = FALSE;
747 break;
748 default: /* "cannot happen" */
749 (void) fprintf(stderr,
750 "%s: panic: Invalid l_value %d\n",
751 progname, lp->l_value);
752 (void) exit(EXIT_FAILURE);
753 }
754 }
755 ifree((char *) fields);
756 }
757 if (ferror(fp)) {
758 (void) fprintf(stderr, "%s: Error reading ", progname);
759 (void) perror(filename);
760 (void) exit(EXIT_FAILURE);
761 }
762 if (fp != stdin && fclose(fp)) {
763 (void) fprintf(stderr, "%s: Error closing ", progname);
764 (void) perror(filename);
765 (void) exit(EXIT_FAILURE);
766 }
767 if (wantcont)
768 error("expected continuation line not found");
769 }
770
771 /*
772 ** Convert a string of one of the forms
773 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
774 ** into a number of seconds.
775 ** A null string maps to zero.
776 ** Call error with errstring and return zero on errors.
777 */
778
779 static long
780 gethms(string, errstring, signable)
781 const char * string;
782 const char * const errstring;
783 const int signable;
784 {
785 int hh, mm, ss, sign;
786
787 if (string == NULL || *string == '\0')
788 return 0;
789 if (!signable)
790 sign = 1;
791 else if (*string == '-') {
792 sign = -1;
793 ++string;
794 } else sign = 1;
795 if (sscanf(string, scheck(string, "%d"), &hh) == 1)
796 mm = ss = 0;
797 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
798 ss = 0;
799 else if (sscanf(string, scheck(string, "%d:%d:%d"),
800 &hh, &mm, &ss) != 3) {
801 error(errstring);
802 return 0;
803 }
804 if (hh < 0 || hh >= HOURSPERDAY ||
805 mm < 0 || mm >= MINSPERHOUR ||
806 ss < 0 || ss > SECSPERMIN) {
807 error(errstring);
808 return 0;
809 }
810 return eitol(sign) *
811 (eitol(hh * MINSPERHOUR + mm) *
812 eitol(SECSPERMIN) + eitol(ss));
813 }
814
815 static void
816 inrule(fields, nfields)
817 register char ** const fields;
818 const int nfields;
819 {
820 static struct rule r;
821
822 if (nfields != RULE_FIELDS) {
823 error("wrong number of fields on Rule line");
824 return;
825 }
826 if (*fields[RF_NAME] == '\0') {
827 error("nameless rule");
828 return;
829 }
830 r.r_filename = filename;
831 r.r_linenum = linenum;
832 r.r_stdoff = gethms(fields[RF_STDOFF], "invalid saved time", TRUE);
833 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
834 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
835 r.r_name = ecpyalloc(fields[RF_NAME]);
836 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
837 rules = (struct rule *) erealloc((char *) rules,
838 (int) ((nrules + 1) * sizeof *rules));
839 rules[nrules++] = r;
840 }
841
842 static int
843 inzone(fields, nfields)
844 register char ** const fields;
845 const int nfields;
846 {
847 register int i;
848 static char * buf;
849
850 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
851 error("wrong number of fields on Zone line");
852 return FALSE;
853 }
854 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
855 buf = erealloc(buf, 132 + strlen(TZDEFAULT));
856 (void) sprintf(buf,
857 "\"Zone %s\" line and -l option are mutually exclusive",
858 TZDEFAULT);
859 error(buf);
860 return FALSE;
861 }
862 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
863 buf = erealloc(buf, 132 + strlen(TZDEFRULES));
864 (void) sprintf(buf,
865 "\"Zone %s\" line and -p option are mutually exclusive",
866 TZDEFRULES);
867 error(buf);
868 return FALSE;
869 }
870 for (i = 0; i < nzones; ++i)
871 if (zones[i].z_name != NULL &&
872 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
873 buf = erealloc(buf, 132 +
874 strlen(fields[ZF_NAME]) +
875 strlen(zones[i].z_filename));
876 (void) sprintf(buf,
877 "duplicate zone name %s (file \"%s\", line %d)",
878 fields[ZF_NAME],
879 zones[i].z_filename,
880 zones[i].z_linenum);
881 error(buf);
882 return FALSE;
883 }
884 return inzsub(fields, nfields, FALSE);
885 }
886
887 static int
888 inzcont(fields, nfields)
889 register char ** const fields;
890 const int nfields;
891 {
892 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
893 error("wrong number of fields on Zone continuation line");
894 return FALSE;
895 }
896 return inzsub(fields, nfields, TRUE);
897 }
898
899 static int
900 inzsub(fields, nfields, iscont)
901 register char ** const fields;
902 const int nfields;
903 const int iscont;
904 {
905 register char * cp;
906 static struct zone z;
907 register int i_gmtoff, i_rule, i_format;
908 register int i_untilyear, i_untilmonth;
909 register int i_untilday, i_untiltime;
910 register int hasuntil;
911
912 if (iscont) {
913 i_gmtoff = ZFC_GMTOFF;
914 i_rule = ZFC_RULE;
915 i_format = ZFC_FORMAT;
916 i_untilyear = ZFC_TILYEAR;
917 i_untilmonth = ZFC_TILMONTH;
918 i_untilday = ZFC_TILDAY;
919 i_untiltime = ZFC_TILTIME;
920 z.z_name = NULL;
921 } else {
922 i_gmtoff = ZF_GMTOFF;
923 i_rule = ZF_RULE;
924 i_format = ZF_FORMAT;
925 i_untilyear = ZF_TILYEAR;
926 i_untilmonth = ZF_TILMONTH;
927 i_untilday = ZF_TILDAY;
928 i_untiltime = ZF_TILTIME;
929 z.z_name = ecpyalloc(fields[ZF_NAME]);
930 }
931 z.z_filename = filename;
932 z.z_linenum = linenum;
933 z.z_gmtoff = gethms(fields[i_gmtoff], "invalid GMT offset", TRUE);
934 if ((cp = strchr(fields[i_format], '%')) != 0) {
935 if (*++cp != 's' || strchr(cp, '%') != 0) {
936 error("invalid abbreviation format");
937 return FALSE;
938 }
939 }
940 z.z_rule = ecpyalloc(fields[i_rule]);
941 z.z_format = ecpyalloc(fields[i_format]);
942 hasuntil = nfields > i_untilyear;
943 if (hasuntil) {
944 z.z_untilrule.r_filename = filename;
945 z.z_untilrule.r_linenum = linenum;
946 rulesub(&z.z_untilrule,
947 fields[i_untilyear],
948 "only",
949 "",
950 (nfields > i_untilmonth) ?
951 fields[i_untilmonth] : "Jan",
952 (nfields > i_untilday) ? fields[i_untilday] : "1",
953 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
954 z.z_untiltime = rpytime(&z.z_untilrule,
955 z.z_untilrule.r_loyear);
956 if (iscont && nzones > 0 &&
957 z.z_untiltime > min_time &&
958 z.z_untiltime < max_time &&
959 zones[nzones - 1].z_untiltime > min_time &&
960 zones[nzones - 1].z_untiltime < max_time &&
961 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
962 error("Zone continuation line end time is not after end time of previous line");
963 return FALSE;
964 }
965 }
966 zones = (struct zone *) erealloc((char *) zones,
967 (int) ((nzones + 1) * sizeof *zones));
968 zones[nzones++] = z;
969 /*
970 ** If there was an UNTIL field on this line,
971 ** there's more information about the zone on the next line.
972 */
973 return hasuntil;
974 }
975
976 static void
977 inleap(fields, nfields)
978 register char ** const fields;
979 const int nfields;
980 {
981 register const char * cp;
982 register const struct lookup * lp;
983 register int i, j;
984 int year, month, day;
985 long dayoff, tod;
986 time_t t;
987
988 if (nfields != LEAP_FIELDS) {
989 error("wrong number of fields on Leap line");
990 return;
991 }
992 dayoff = 0;
993 cp = fields[LP_YEAR];
994 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
995 /*
996 * Leapin' Lizards!
997 */
998 error("invalid leaping year");
999 return;
1000 }
1001 j = EPOCH_YEAR;
1002 while (j != year) {
1003 if (year > j) {
1004 i = len_years[isleap(j)];
1005 ++j;
1006 } else {
1007 --j;
1008 i = -len_years[isleap(j)];
1009 }
1010 dayoff = oadd(dayoff, eitol(i));
1011 }
1012 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1013 error("invalid month name");
1014 return;
1015 }
1016 month = lp->l_value;
1017 j = TM_JANUARY;
1018 while (j != month) {
1019 i = len_months[isleap(year)][j];
1020 dayoff = oadd(dayoff, eitol(i));
1021 ++j;
1022 }
1023 cp = fields[LP_DAY];
1024 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1025 day <= 0 || day > len_months[isleap(year)][month]) {
1026 error("invalid day of month");
1027 return;
1028 }
1029 dayoff = oadd(dayoff, eitol(day - 1));
1030 if (dayoff < 0 && !tt_signed) {
1031 error("time before zero");
1032 return;
1033 }
1034 t = (time_t) dayoff * SECSPERDAY;
1035 /*
1036 ** Cheap overflow check.
1037 */
1038 if (t / SECSPERDAY != dayoff) {
1039 error("time overflow");
1040 return;
1041 }
1042 tod = gethms(fields[LP_TIME], "invalid time of day", FALSE);
1043 cp = fields[LP_CORR];
1044 {
1045 register int positive;
1046 int count;
1047
1048 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1049 positive = FALSE;
1050 count = 1;
1051 } else if (strcmp(cp, "--") == 0) {
1052 positive = FALSE;
1053 count = 2;
1054 } else if (strcmp(cp, "+") == 0) {
1055 positive = TRUE;
1056 count = 1;
1057 } else if (strcmp(cp, "++") == 0) {
1058 positive = TRUE;
1059 count = 2;
1060 } else {
1061 error("illegal CORRECTION field on Leap line");
1062 return;
1063 }
1064 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1065 error("illegal Rolling/Stationary field on Leap line");
1066 return;
1067 }
1068 leapadd(tadd(t, tod), positive, lp->l_value, count);
1069 }
1070 }
1071
1072 static void
1073 inlink(fields, nfields)
1074 register char ** const fields;
1075 const int nfields;
1076 {
1077 struct link l;
1078
1079 if (nfields != LINK_FIELDS) {
1080 error("wrong number of fields on Link line");
1081 return;
1082 }
1083 if (*fields[LF_FROM] == '\0') {
1084 error("blank FROM field on Link line");
1085 return;
1086 }
1087 if (*fields[LF_TO] == '\0') {
1088 error("blank TO field on Link line");
1089 return;
1090 }
1091 l.l_filename = filename;
1092 l.l_linenum = linenum;
1093 l.l_from = ecpyalloc(fields[LF_FROM]);
1094 l.l_to = ecpyalloc(fields[LF_TO]);
1095 links = (struct link *) erealloc((char *) links,
1096 (int) ((nlinks + 1) * sizeof *links));
1097 links[nlinks++] = l;
1098 }
1099
1100 static void
1101 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1102 register struct rule * const rp;
1103 char * const loyearp;
1104 char * const hiyearp;
1105 char * const typep;
1106 char * const monthp;
1107 char * const dayp;
1108 char * const timep;
1109 {
1110 register struct lookup const * lp;
1111 register char * cp;
1112
1113 if ((lp = byword(monthp, mon_names)) == NULL) {
1114 error("invalid month name");
1115 return;
1116 }
1117 rp->r_month = lp->l_value;
1118 rp->r_todisstd = FALSE;
1119 cp = timep;
1120 if (*cp != '\0') {
1121 cp += strlen(cp) - 1;
1122 switch (lowerit(*cp)) {
1123 case 's':
1124 rp->r_todisstd = TRUE;
1125 *cp = '\0';
1126 break;
1127 case 'w':
1128 rp->r_todisstd = FALSE;
1129 *cp = '\0';
1130 break;
1131 }
1132 }
1133 rp->r_tod = gethms(timep, "invalid time of day", FALSE);
1134 /*
1135 ** Year work.
1136 */
1137 cp = loyearp;
1138 if ((lp = byword(cp, begin_years)) != NULL) switch ((int) lp->l_value) {
1139 case YR_MINIMUM:
1140 rp->r_loyear = min_int;
1141 break;
1142 case YR_MAXIMUM:
1143 rp->r_loyear = max_int;
1144 break;
1145 default: /* "cannot happen" */
1146 (void) fprintf(stderr,
1147 "%s: panic: Invalid l_value %d\n",
1148 progname, lp->l_value);
1149 (void) exit(EXIT_FAILURE);
1150 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1151 error("invalid starting year");
1152 return;
1153 }
1154 cp = hiyearp;
1155 if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
1156 case YR_MINIMUM:
1157 rp->r_hiyear = min_int;
1158 break;
1159 case YR_MAXIMUM:
1160 rp->r_hiyear = max_int;
1161 break;
1162 case YR_ONLY:
1163 rp->r_hiyear = rp->r_loyear;
1164 break;
1165 default: /* "cannot happen" */
1166 (void) fprintf(stderr,
1167 "%s: panic: Invalid l_value %d\n",
1168 progname, lp->l_value);
1169 (void) exit(EXIT_FAILURE);
1170 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1171 error("invalid ending year");
1172 return;
1173 }
1174 if (rp->r_loyear > rp->r_hiyear) {
1175 error("starting year greater than ending year");
1176 return;
1177 }
1178 if (*typep == '\0')
1179 rp->r_yrtype = NULL;
1180 else {
1181 if (rp->r_loyear == rp->r_hiyear) {
1182 error("typed single year");
1183 return;
1184 }
1185 rp->r_yrtype = ecpyalloc(typep);
1186 }
1187 /*
1188 ** Day work.
1189 ** Accept things such as:
1190 ** 1
1191 ** last-Sunday
1192 ** Sun<=20
1193 ** Sun>=7
1194 */
1195 if ((lp = byword(dayp, lasts)) != NULL) {
1196 rp->r_dycode = DC_DOWLEQ;
1197 rp->r_wday = lp->l_value;
1198 rp->r_dayofmonth = len_months[1][rp->r_month];
1199 } else {
1200 if ((cp = strchr(dayp, '<')) != 0)
1201 rp->r_dycode = DC_DOWLEQ;
1202 else if ((cp = strchr(dayp, '>')) != 0)
1203 rp->r_dycode = DC_DOWGEQ;
1204 else {
1205 cp = dayp;
1206 rp->r_dycode = DC_DOM;
1207 }
1208 if (rp->r_dycode != DC_DOM) {
1209 *cp++ = 0;
1210 if (*cp++ != '=') {
1211 error("invalid day of month");
1212 return;
1213 }
1214 if ((lp = byword(dayp, wday_names)) == NULL) {
1215 error("invalid weekday name");
1216 return;
1217 }
1218 rp->r_wday = lp->l_value;
1219 }
1220 if (sscanf(cp, scheck(cp, "%d"), &rp->r_dayofmonth) != 1 ||
1221 rp->r_dayofmonth <= 0 ||
1222 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1223 error("invalid day of month");
1224 return;
1225 }
1226 }
1227 }
1228
1229 static void
1230 convert(val, buf)
1231 const long val;
1232 char * const buf;
1233 {
1234 register int i;
1235 register long shift;
1236
1237 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1238 buf[i] = val >> shift;
1239 }
1240
1241 static void
1242 puttzcode(val, fp)
1243 const long val;
1244 FILE * const fp;
1245 {
1246 char buf[4];
1247
1248 convert(val, buf);
1249 (void) fwrite((genericptr_t) buf,
1250 (fwrite_size_t) sizeof buf,
1251 (fwrite_size_t) 1, fp);
1252 }
1253
1254 static void
1255 writezone(name)
1256 const char * const name;
1257 {
1258 register FILE * fp;
1259 register int i, j;
1260 static char * fullname;
1261 static struct tzhead tzh;
1262
1263 fullname = erealloc(fullname,
1264 strlen(directory) + 1 + strlen(name) + 1);
1265 (void) sprintf(fullname, "%s/%s", directory, name);
1266 if ((fp = fopen(fullname, "wb")) == NULL) {
1267 if (mkdirs(fullname) != 0)
1268 (void) exit(EXIT_FAILURE);
1269 if ((fp = fopen(fullname, "wb")) == NULL) {
1270 (void) fprintf(stderr, "%s: Can't create ", progname);
1271 (void) perror(fullname);
1272 (void) exit(EXIT_FAILURE);
1273 }
1274 }
1275 convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1276 convert(eitol(leapcnt), tzh.tzh_leapcnt);
1277 convert(eitol(timecnt), tzh.tzh_timecnt);
1278 convert(eitol(typecnt), tzh.tzh_typecnt);
1279 convert(eitol(charcnt), tzh.tzh_charcnt);
1280 (void) fwrite((genericptr_t) &tzh,
1281 (fwrite_size_t) sizeof tzh,
1282 (fwrite_size_t) 1, fp);
1283 for (i = 0; i < timecnt; ++i) {
1284 j = leapcnt;
1285 while (--j >= 0)
1286 if (ats[i] >= trans[j]) {
1287 ats[i] = tadd(ats[i], corr[j]);
1288 break;
1289 }
1290 puttzcode((long) ats[i], fp);
1291 }
1292 if (timecnt > 0)
1293 (void) fwrite((genericptr_t) types,
1294 (fwrite_size_t) sizeof types[0],
1295 (fwrite_size_t) timecnt, fp);
1296 for (i = 0; i < typecnt; ++i) {
1297 puttzcode((long) gmtoffs[i], fp);
1298 (void) putc(isdsts[i], fp);
1299 (void) putc(abbrinds[i], fp);
1300 }
1301 if (charcnt != 0)
1302 (void) fwrite((genericptr_t) chars,
1303 (fwrite_size_t) sizeof chars[0],
1304 (fwrite_size_t) charcnt, fp);
1305 for (i = 0; i < leapcnt; ++i) {
1306 if (roll[i]) {
1307 if (timecnt == 0 || trans[i] < ats[0]) {
1308 j = 0;
1309 while (isdsts[j])
1310 if (++j >= typecnt) {
1311 j = 0;
1312 break;
1313 }
1314 } else {
1315 j = 1;
1316 while (j < timecnt && trans[i] >= ats[j])
1317 ++j;
1318 j = types[j - 1];
1319 }
1320 puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
1321 } else puttzcode((long) trans[i], fp);
1322 puttzcode((long) corr[i], fp);
1323 }
1324 for (i = 0; i < typecnt; ++i)
1325 (void) putc(ttisstds[i], fp);
1326 if (ferror(fp) || fclose(fp)) {
1327 (void) fprintf(stderr, "%s: Write error on ", progname);
1328 (void) perror(fullname);
1329 (void) exit(EXIT_FAILURE);
1330 }
1331 }
1332
1333 static void
1334 outzone(zpfirst, zonecount)
1335 const struct zone * const zpfirst;
1336 const int zonecount;
1337 {
1338 register const struct zone * zp;
1339 register struct rule * rp;
1340 register int i, j;
1341 register int usestart, useuntil;
1342 register time_t starttime, untiltime;
1343 register long gmtoff;
1344 register long stdoff;
1345 register int year;
1346 register long startoff;
1347 register int startisdst;
1348 register int startttisstd;
1349 register int type;
1350 char startbuf[BUFSIZ];
1351
1352 /*
1353 ** Now. . .finally. . .generate some useful data!
1354 */
1355 timecnt = 0;
1356 typecnt = 0;
1357 charcnt = 0;
1358 /*
1359 ** A guess that may well be corrected later.
1360 */
1361 stdoff = 0;
1362 /*
1363 ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
1364 ** for noting the need to unconditionally initialize startttisstd.
1365 */
1366 startttisstd = FALSE;
1367 #ifdef lint
1368 starttime = 0;
1369 #endif /* defined lint */
1370 for (i = 0; i < zonecount; ++i) {
1371 zp = &zpfirst[i];
1372 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1373 useuntil = i < (zonecount - 1);
1374 if (useuntil && zp->z_untiltime <= min_time)
1375 continue;
1376 gmtoff = zp->z_gmtoff;
1377 eat(zp->z_filename, zp->z_linenum);
1378 startisdst = -1;
1379 if (zp->z_nrules == 0) {
1380 stdoff = zp->z_stdoff;
1381 (void) strcpy(startbuf, zp->z_format);
1382 type = addtype(oadd(zp->z_gmtoff, stdoff),
1383 startbuf, stdoff != 0, startttisstd);
1384 if (usestart)
1385 addtt(starttime, type);
1386 else if (stdoff != 0)
1387 addtt(min_time, type);
1388 } else for (year = min_year; year <= max_year; ++year) {
1389 if (useuntil && year > zp->z_untilrule.r_hiyear)
1390 break;
1391 /*
1392 ** Mark which rules to do in the current year.
1393 ** For those to do, calculate rpytime(rp, year);
1394 */
1395 for (j = 0; j < zp->z_nrules; ++j) {
1396 rp = &zp->z_rules[j];
1397 eats(zp->z_filename, zp->z_linenum,
1398 rp->r_filename, rp->r_linenum);
1399 rp->r_todo = year >= rp->r_loyear &&
1400 year <= rp->r_hiyear &&
1401 yearistype(year, rp->r_yrtype);
1402 if (rp->r_todo)
1403 rp->r_temp = rpytime(rp, year);
1404 }
1405 for ( ; ; ) {
1406 register int k;
1407 register time_t jtime, ktime;
1408 register long offset;
1409 char buf[BUFSIZ];
1410
1411 if (useuntil) {
1412 /*
1413 ** Turn untiltime into GMT
1414 ** assuming the current gmtoff and
1415 ** stdoff values.
1416 */
1417 untiltime = tadd(zp->z_untiltime,
1418 -gmtoff);
1419 if (!zp->z_untilrule.r_todisstd)
1420 untiltime = tadd(untiltime,
1421 -stdoff);
1422 }
1423 /*
1424 ** Find the rule (of those to do, if any)
1425 ** that takes effect earliest in the year.
1426 */
1427 k = -1;
1428 #ifdef lint
1429 ktime = 0;
1430 #endif /* defined lint */
1431 for (j = 0; j < zp->z_nrules; ++j) {
1432 rp = &zp->z_rules[j];
1433 if (!rp->r_todo)
1434 continue;
1435 eats(zp->z_filename, zp->z_linenum,
1436 rp->r_filename, rp->r_linenum);
1437 offset = gmtoff;
1438 if (!rp->r_todisstd)
1439 offset = oadd(offset, stdoff);
1440 jtime = rp->r_temp;
1441 if (jtime == min_time ||
1442 jtime == max_time)
1443 continue;
1444 jtime = tadd(jtime, -offset);
1445 if (k < 0 || jtime < ktime) {
1446 k = j;
1447 ktime = jtime;
1448 }
1449 }
1450 if (k < 0)
1451 break; /* go on to next year */
1452 rp = &zp->z_rules[k];
1453 rp->r_todo = FALSE;
1454 if (useuntil && ktime >= untiltime)
1455 break;
1456 if (usestart) {
1457 if (ktime < starttime) {
1458 stdoff = rp->r_stdoff;
1459 startoff = oadd(zp->z_gmtoff,
1460 rp->r_stdoff);
1461 (void) sprintf(startbuf, zp->z_format,
1462 rp->r_abbrvar);
1463 startisdst = rp->r_stdoff != 0;
1464 continue;
1465 }
1466 usestart = FALSE;
1467 if (ktime != starttime) {
1468 if (startisdst < 0 &&
1469 zp->z_gmtoff !=
1470 (zp - 1)->z_gmtoff) {
1471 type = (timecnt == 0) ? 0 :
1472 types[timecnt - 1];
1473 startoff = oadd(gmtoffs[type],
1474 -(zp - 1)->z_gmtoff);
1475 startisdst = startoff != 0;
1476 startoff = oadd(startoff,
1477 zp->z_gmtoff);
1478 (void) strcpy(startbuf,
1479 &chars[abbrinds[type]]);
1480 }
1481 if (startisdst >= 0)
1482 addtt(starttime, addtype(startoff, startbuf, startisdst, startttisstd));
1483 }
1484 }
1485 eats(zp->z_filename, zp->z_linenum,
1486 rp->r_filename, rp->r_linenum);
1487 (void) sprintf(buf, zp->z_format,
1488 rp->r_abbrvar);
1489 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
1490 type = addtype(offset, buf, rp->r_stdoff != 0,
1491 rp->r_todisstd);
1492 addtt(ktime, type);
1493 stdoff = rp->r_stdoff;
1494 }
1495 }
1496 /*
1497 ** Now we may get to set starttime for the next zone line.
1498 */
1499 if (useuntil) {
1500 starttime = tadd(zp->z_untiltime, -gmtoff);
1501 startttisstd = zp->z_untilrule.r_todisstd;
1502 if (!startttisstd)
1503 starttime = tadd(starttime, -stdoff);
1504 }
1505 }
1506 writezone(zpfirst->z_name);
1507 }
1508
1509 static void
1510 addtt(starttime, type)
1511 const time_t starttime;
1512 const int type;
1513 {
1514 if (timecnt != 0 && type == types[timecnt - 1])
1515 return; /* easy enough! */
1516 if (timecnt == 0 && type == 0 && isdsts[0] == 0)
1517 return; /* handled by default rule */
1518 if (timecnt >= TZ_MAX_TIMES) {
1519 error("too many transitions?!");
1520 (void) exit(EXIT_FAILURE);
1521 }
1522 ats[timecnt] = starttime;
1523 types[timecnt] = type;
1524 ++timecnt;
1525 }
1526
1527 static int
1528 addtype(gmtoff, abbr, isdst, ttisstd)
1529 const long gmtoff;
1530 const char * const abbr;
1531 const int isdst;
1532 const int ttisstd;
1533 {
1534 register int i, j;
1535
1536 /*
1537 ** See if there's already an entry for this zone type.
1538 ** If so, just return its index.
1539 */
1540 for (i = 0; i < typecnt; ++i) {
1541 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1542 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1543 ttisstd == ttisstds[i])
1544 return i;
1545 }
1546 /*
1547 ** There isn't one; add a new one, unless there are already too
1548 ** many.
1549 */
1550 if (typecnt >= TZ_MAX_TYPES) {
1551 error("too many local time types");
1552 (void) exit(EXIT_FAILURE);
1553 }
1554 gmtoffs[i] = gmtoff;
1555 isdsts[i] = isdst;
1556 ttisstds[i] = ttisstd;
1557
1558 for (j = 0; j < charcnt; ++j)
1559 if (strcmp(&chars[j], abbr) == 0)
1560 break;
1561 if (j == charcnt)
1562 newabbr(abbr);
1563 abbrinds[i] = j;
1564 ++typecnt;
1565 return i;
1566 }
1567
1568 static void
1569 leapadd(t, positive, rolling, count)
1570 const time_t t;
1571 const int positive;
1572 const int rolling;
1573 int count;
1574 {
1575 register int i, j;
1576
1577 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1578 error("too many leap seconds");
1579 (void) exit(EXIT_FAILURE);
1580 }
1581 for (i = 0; i < leapcnt; ++i)
1582 if (t <= trans[i]) {
1583 if (t == trans[i]) {
1584 error("repeated leap second moment");
1585 (void) exit(EXIT_FAILURE);
1586 }
1587 break;
1588 }
1589 do {
1590 for (j = leapcnt; j > i; --j) {
1591 trans[j] = trans[j - 1];
1592 corr[j] = corr[j - 1];
1593 roll[j] = roll[j - 1];
1594 }
1595 trans[i] = t;
1596 corr[i] = positive ? 1L : eitol(-count);
1597 roll[i] = rolling;
1598 ++leapcnt;
1599 } while (positive && --count != 0);
1600 }
1601
1602 static void
1603 adjleap()
1604 {
1605 register int i;
1606 register long last = 0;
1607
1608 /*
1609 ** propagate leap seconds forward
1610 */
1611 for (i = 0; i < leapcnt; ++i) {
1612 trans[i] = tadd(trans[i], last);
1613 last = corr[i] += last;
1614 }
1615 }
1616
1617 static int
1618 yearistype(year, type)
1619 const int year;
1620 const char * const type;
1621 {
1622 static char * buf;
1623 int result;
1624
1625 if (type == NULL || *type == '\0')
1626 return TRUE;
1627 if (strcmp(type, "uspres") == 0)
1628 return (year % 4) == 0;
1629 if (strcmp(type, "nonpres") == 0)
1630 return (year % 4) != 0;
1631 buf = erealloc(buf, 132 + strlen(yitcommand) + strlen(type));
1632 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
1633 result = system(buf);
1634 if (result == 0)
1635 return TRUE;
1636 if (result == (1 << 8))
1637 return FALSE;
1638 error("Wild result from command execution");
1639 (void) fprintf(stderr, "%s: command was '%s', result was %d\n",
1640 progname, buf, result);
1641 for ( ; ; )
1642 (void) exit(EXIT_FAILURE);
1643 }
1644
1645 static int
1646 lowerit(a)
1647 const int a;
1648 {
1649 return (isascii(a) && isupper(a)) ? tolower(a) : a;
1650 }
1651
1652 static int
1653 ciequal(ap, bp) /* case-insensitive equality */
1654 register const char * ap;
1655 register const char * bp;
1656 {
1657 while (lowerit(*ap) == lowerit(*bp++))
1658 if (*ap++ == '\0')
1659 return TRUE;
1660 return FALSE;
1661 }
1662
1663 static int
1664 itsabbr(abbr, word)
1665 register const char * abbr;
1666 register const char * word;
1667 {
1668 if (lowerit(*abbr) != lowerit(*word))
1669 return FALSE;
1670 ++word;
1671 while (*++abbr != '\0')
1672 do if (*word == '\0')
1673 return FALSE;
1674 while (lowerit(*word++) != lowerit(*abbr));
1675 return TRUE;
1676 }
1677
1678 static const struct lookup *
1679 byword(word, table)
1680 register const char * const word;
1681 register const struct lookup * const table;
1682 {
1683 register const struct lookup * foundlp;
1684 register const struct lookup * lp;
1685
1686 if (word == NULL || table == NULL)
1687 return NULL;
1688 /*
1689 ** Look for exact match.
1690 */
1691 for (lp = table; lp->l_word != NULL; ++lp)
1692 if (ciequal(word, lp->l_word))
1693 return lp;
1694 /*
1695 ** Look for inexact match.
1696 */
1697 foundlp = NULL;
1698 for (lp = table; lp->l_word != NULL; ++lp)
1699 if (itsabbr(word, lp->l_word))
1700 if (foundlp == NULL)
1701 foundlp = lp;
1702 else return NULL; /* multiple inexact matches */
1703 return foundlp;
1704 }
1705
1706 static char **
1707 getfields(cp)
1708 register char * cp;
1709 {
1710 register char * dp;
1711 register char ** array;
1712 register int nsubs;
1713
1714 if (cp == NULL)
1715 return NULL;
1716 array = (char **) emalloc((int) ((strlen(cp) + 1) * sizeof *array));
1717 nsubs = 0;
1718 for ( ; ; ) {
1719 while (isascii(*cp) && isspace(*cp))
1720 ++cp;
1721 if (*cp == '\0' || *cp == '#')
1722 break;
1723 array[nsubs++] = dp = cp;
1724 do {
1725 if ((*dp = *cp++) != '"')
1726 ++dp;
1727 else while ((*dp = *cp++) != '"')
1728 if (*dp != '\0')
1729 ++dp;
1730 else error("Odd number of quotation marks");
1731 } while (*cp != '\0' && *cp != '#' &&
1732 (!isascii(*cp) || !isspace(*cp)));
1733 if (isascii(*cp) && isspace(*cp))
1734 ++cp;
1735 *dp = '\0';
1736 }
1737 array[nsubs] = NULL;
1738 return array;
1739 }
1740
1741 static long
1742 oadd(t1, t2)
1743 const long t1;
1744 const long t2;
1745 {
1746 register long t;
1747
1748 t = t1 + t2;
1749 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1750 error("time overflow");
1751 (void) exit(EXIT_FAILURE);
1752 }
1753 return t;
1754 }
1755
1756 static time_t
1757 tadd(t1, t2)
1758 const time_t t1;
1759 const long t2;
1760 {
1761 register time_t t;
1762
1763 if (t1 == max_time && t2 > 0)
1764 return max_time;
1765 if (t1 == min_time && t2 < 0)
1766 return min_time;
1767 t = t1 + t2;
1768 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1769 error("time overflow");
1770 (void) exit(EXIT_FAILURE);
1771 }
1772 return t;
1773 }
1774
1775 /*
1776 ** Given a rule, and a year, compute the date - in seconds since January 1,
1777 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
1778 */
1779
1780 static time_t
1781 rpytime(rp, wantedy)
1782 register const struct rule * const rp;
1783 register const int wantedy;
1784 {
1785 register int y, m, i;
1786 register long dayoff; /* with a nod to Margaret O. */
1787 register time_t t;
1788
1789 if (wantedy == min_int)
1790 return min_time;
1791 if (wantedy == max_int)
1792 return max_time;
1793 dayoff = 0;
1794 m = TM_JANUARY;
1795 y = EPOCH_YEAR;
1796 while (wantedy != y) {
1797 if (wantedy > y) {
1798 i = len_years[isleap(y)];
1799 ++y;
1800 } else {
1801 --y;
1802 i = -len_years[isleap(y)];
1803 }
1804 dayoff = oadd(dayoff, eitol(i));
1805 }
1806 while (m != rp->r_month) {
1807 i = len_months[isleap(y)][m];
1808 dayoff = oadd(dayoff, eitol(i));
1809 ++m;
1810 }
1811 i = rp->r_dayofmonth;
1812 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
1813 if (rp->r_dycode == DC_DOWLEQ)
1814 --i;
1815 else {
1816 error("use of 2/29 in non leap-year");
1817 (void) exit(EXIT_FAILURE);
1818 }
1819 }
1820 --i;
1821 dayoff = oadd(dayoff, eitol(i));
1822 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
1823 register long wday;
1824
1825 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
1826 wday = eitol(EPOCH_WDAY);
1827 /*
1828 ** Don't trust mod of negative numbers.
1829 */
1830 if (dayoff >= 0)
1831 wday = (wday + dayoff) % LDAYSPERWEEK;
1832 else {
1833 wday -= ((-dayoff) % LDAYSPERWEEK);
1834 if (wday < 0)
1835 wday += LDAYSPERWEEK;
1836 }
1837 while (wday != eitol(rp->r_wday))
1838 if (rp->r_dycode == DC_DOWGEQ) {
1839 dayoff = oadd(dayoff, (long) 1);
1840 if (++wday >= LDAYSPERWEEK)
1841 wday = 0;
1842 ++i;
1843 } else {
1844 dayoff = oadd(dayoff, (long) -1);
1845 if (--wday < 0)
1846 wday = LDAYSPERWEEK - 1;
1847 --i;
1848 }
1849 if (i < 0 || i >= len_months[isleap(y)][m]) {
1850 error("no day in month matches rule");
1851 (void) exit(EXIT_FAILURE);
1852 }
1853 }
1854 if (dayoff < 0 && !tt_signed)
1855 return min_time;
1856 t = (time_t) dayoff * SECSPERDAY;
1857 /*
1858 ** Cheap overflow check.
1859 */
1860 if (t / SECSPERDAY != dayoff)
1861 return (dayoff > 0) ? max_time : min_time;
1862 return tadd(t, rp->r_tod);
1863 }
1864
1865 static void
1866 newabbr(string)
1867 const char * const string;
1868 {
1869 register int i;
1870
1871 i = strlen(string) + 1;
1872 if (charcnt + i > TZ_MAX_CHARS) {
1873 error("too many, or too long, time zone abbreviations");
1874 (void) exit(EXIT_FAILURE);
1875 }
1876 (void) strcpy(&chars[charcnt], string);
1877 charcnt += eitol(i);
1878 }
1879
1880 static int
1881 mkdirs(argname)
1882 char * const argname;
1883 {
1884 register char * name;
1885 register char * cp;
1886
1887 if (argname == NULL || *argname == '\0')
1888 return 0;
1889 cp = name = ecpyalloc(argname);
1890 while ((cp = strchr(cp + 1, '/')) != 0) {
1891 *cp = '\0';
1892 #ifndef unix
1893 /*
1894 ** MS-DOS drive specifier?
1895 */
1896 if (strlen(name) == 2 && isascii(name[0]) &&
1897 isalpha(name[0]) && name[1] == ':') {
1898 *cp = '/';
1899 continue;
1900 }
1901 #endif /* !defined unix */
1902 if (!itsdir(name)) {
1903 /*
1904 ** It doesn't seem to exist, so we try to create it.
1905 */
1906 if (emkdir(name, 0755) != 0) {
1907 (void) fprintf(stderr,
1908 "%s: Can't create directory ",
1909 progname);
1910 (void) perror(name);
1911 ifree(name);
1912 return -1;
1913 }
1914 }
1915 *cp = '/';
1916 }
1917 ifree(name);
1918 return 0;
1919 }
1920
1921 static long
1922 eitol(i)
1923 const int i;
1924 {
1925 long l;
1926
1927 l = i;
1928 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
1929 (void) fprintf(stderr,
1930 "%s: %d did not sign extend correctly\n",
1931 progname, i);
1932 (void) exit(EXIT_FAILURE);
1933 }
1934 return l;
1935 }
1936
1937 /*
1938 ** UNIX is a registered trademark of AT&T.
1939 */
Unaltered CVS history