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initial import
[glibc.git] / time / zic.c
blob73ea46821ede096ea8f70e71eff7ef3723b21584
1 #ifndef lint
2 #ifndef NOID
3 static char elsieid[] = "@(#)zic.c 7.28";
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 int r_todisuniv; /* above is universal time if TRUE */
29 /* or local time if FALSE */
30 long r_stdoff; /* offset from standard time */
31 const char * r_abbrvar; /* variable part of abbreviation */
32
33 int r_todo; /* a rule to do (used in outzone) */
34 time_t r_temp; /* used in outzone */
35 };
36
37 /*
38 ** r_dycode r_dayofmonth r_wday
39 */
40
41 #define DC_DOM 0 /* 1..31 */ /* unused */
42 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
43 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
44
45 struct zone {
46 const char * z_filename;
47 int z_linenum;
48
49 const char * z_name;
50 long z_gmtoff;
51 const char * z_rule;
52 const char * z_format;
53
54 long z_stdoff;
55
56 struct rule * z_rules;
57 int z_nrules;
58
59 struct rule z_untilrule;
60 time_t z_untiltime;
61 };
62
63 extern int emkdir P((const char * name, int mode));
64 extern int getopt P((int argc, char * argv[], const char * options));
65 extern char * icatalloc P((char * old, const char * new));
66 extern char * icpyalloc P((const char * string));
67 extern void ifree P((char * p));
68 extern char * imalloc P((int n));
69 extern void * irealloc P((void * old, int n));
70 extern int link P((const char * fromname, const char * toname));
71 extern char * optarg;
72 extern int optind;
73 extern char * scheck P((const char * string, const char * format));
74
75 static void addtt P((time_t starttime, int type));
76 static int addtype P((long gmtoff, const char * abbr, int isdst,
77 int ttisstd));
78 static void leapadd P((time_t t, int positive, int rolling, int count));
79 static void adjleap P((void));
80 static void associate P((void));
81 static int ciequal P((const char * ap, const char * bp));
82 static void convert P((long val, char * buf));
83 static void dolink P((const char * fromfile, const char * tofile));
84 static void eat P((const char * name, int num));
85 static void eats P((const char * name, int num,
86 const char * rname, int rnum));
87 static long eitol P((int i));
88 static void error P((const char * message));
89 static char ** getfields P((char * buf));
90 static long gethms P((const char * string, const char * errstrng,
91 int signable));
92 static void infile P((const char * filename));
93 static void inleap P((char ** fields, int nfields));
94 static void inlink P((char ** fields, int nfields));
95 static void inrule P((char ** fields, int nfields));
96 static int inzcont P((char ** fields, int nfields));
97 static int inzone P((char ** fields, int nfields));
98 static int inzsub P((char ** fields, int nfields, int iscont));
99 static int itsabbr P((const char * abbr, const char * word));
100 static int itsdir P((const char * name));
101 static int lowerit P((int c));
102 static char * memcheck P((char * tocheck));
103 static int mkdirs P((char * filename));
104 static void newabbr P((const char * abbr));
105 static long oadd P((long t1, long t2));
106 static void outzone P((const struct zone * zp, int ntzones));
107 static void puttzcode P((long code, FILE * fp));
108 static int rcomp P((const genericptr_T leftp, const genericptr_T rightp));
109 static time_t rpytime P((const struct rule * rp, int wantedy));
110 static void rulesub P((struct rule * rp,
111 const char * loyearp, const char * hiyearp,
112 const char * typep, const char * monthp,
113 const char * dayp, const char * timep));
114 static void setboundaries P((void));
115 static time_t tadd P((time_t t1, long t2));
116 static void usage P((void));
117 static void writezone P((const char * name));
118 static int yearistype P((int year, const char * type));
119
120 static int charcnt;
121 static int errors;
122 static const char * filename;
123 static int leapcnt;
124 static int linenum;
125 static int max_int;
126 static time_t max_time;
127 static int max_year;
128 static int min_int;
129 static time_t min_time;
130 static int min_year;
131 static int noise;
132 static const char * rfilename;
133 static int rlinenum;
134 static const char * progname;
135 static int timecnt;
136 static int typecnt;
137 static int tt_signed;
138
139 /*
140 ** Line codes.
141 */
142
143 #define LC_RULE 0
144 #define LC_ZONE 1
145 #define LC_LINK 2
146 #define LC_LEAP 3
147
148 /*
149 ** Which fields are which on a Zone line.
150 */
151
152 #define ZF_NAME 1
153 #define ZF_GMTOFF 2
154 #define ZF_RULE 3
155 #define ZF_FORMAT 4
156 #define ZF_TILYEAR 5
157 #define ZF_TILMONTH 6
158 #define ZF_TILDAY 7
159 #define ZF_TILTIME 8
160 #define ZONE_MINFIELDS 5
161 #define ZONE_MAXFIELDS 9
162
163 /*
164 ** Which fields are which on a Zone continuation line.
165 */
166
167 #define ZFC_GMTOFF 0
168 #define ZFC_RULE 1
169 #define ZFC_FORMAT 2
170 #define ZFC_TILYEAR 3
171 #define ZFC_TILMONTH 4
172 #define ZFC_TILDAY 5
173 #define ZFC_TILTIME 6
174 #define ZONEC_MINFIELDS 3
175 #define ZONEC_MAXFIELDS 7
176
177 /*
178 ** Which files are which on a Rule line.
179 */
180
181 #define RF_NAME 1
182 #define RF_LOYEAR 2
183 #define RF_HIYEAR 3
184 #define RF_COMMAND 4
185 #define RF_MONTH 5
186 #define RF_DAY 6
187 #define RF_TOD 7
188 #define RF_STDOFF 8
189 #define RF_ABBRVAR 9
190 #define RULE_FIELDS 10
191
192 /*
193 ** Which fields are which on a Link line.
194 */
195
196 #define LF_FROM 1
197 #define LF_TO 2
198 #define LINK_FIELDS 3
199
200 /*
201 ** Which fields are which on a Leap line.
202 */
203
204 #define LP_YEAR 1
205 #define LP_MONTH 2
206 #define LP_DAY 3
207 #define LP_TIME 4
208 #define LP_CORR 5
209 #define LP_ROLL 6
210 #define LEAP_FIELDS 7
211
212 /*
213 ** Year synonyms.
214 */
215
216 #define YR_MINIMUM 0
217 #define YR_MAXIMUM 1
218 #define YR_ONLY 2
219
220 static struct rule * rules;
221 static int nrules; /* number of rules */
222
223 static struct zone * zones;
224 static int nzones; /* number of zones */
225
226 struct link {
227 const char * l_filename;
228 int l_linenum;
229 const char * l_from;
230 const char * l_to;
231 };
232
233 static struct link * links;
234 static int nlinks;
235
236 struct lookup {
237 const char * l_word;
238 const int l_value;
239 };
240
241 static struct lookup const * byword P((const char * string,
242 const struct lookup * lp));
243
244 static struct lookup const line_codes[] = {
245 { "Rule", LC_RULE },
246 { "Zone", LC_ZONE },
247 { "Link", LC_LINK },
248 { "Leap", LC_LEAP },
249 { NULL, 0}
250 };
251
252 static struct lookup const mon_names[] = {
253 { "January", TM_JANUARY },
254 { "February", TM_FEBRUARY },
255 { "March", TM_MARCH },
256 { "April", TM_APRIL },
257 { "May", TM_MAY },
258 { "June", TM_JUNE },
259 { "July", TM_JULY },
260 { "August", TM_AUGUST },
261 { "September", TM_SEPTEMBER },
262 { "October", TM_OCTOBER },
263 { "November", TM_NOVEMBER },
264 { "December", TM_DECEMBER },
265 { NULL, 0 }
266 };
267
268 static struct lookup const wday_names[] = {
269 { "Sunday", TM_SUNDAY },
270 { "Monday", TM_MONDAY },
271 { "Tuesday", TM_TUESDAY },
272 { "Wednesday", TM_WEDNESDAY },
273 { "Thursday", TM_THURSDAY },
274 { "Friday", TM_FRIDAY },
275 { "Saturday", TM_SATURDAY },
276 { NULL, 0 }
277 };
278
279 static struct lookup const lasts[] = {
280 { "last-Sunday", TM_SUNDAY },
281 { "last-Monday", TM_MONDAY },
282 { "last-Tuesday", TM_TUESDAY },
283 { "last-Wednesday", TM_WEDNESDAY },
284 { "last-Thursday", TM_THURSDAY },
285 { "last-Friday", TM_FRIDAY },
286 { "last-Saturday", TM_SATURDAY },
287 { NULL, 0 }
288 };
289
290 static struct lookup const begin_years[] = {
291 { "minimum", YR_MINIMUM },
292 { "maximum", YR_MAXIMUM },
293 { NULL, 0 }
294 };
295
296 static struct lookup const end_years[] = {
297 { "minimum", YR_MINIMUM },
298 { "maximum", YR_MAXIMUM },
299 { "only", YR_ONLY },
300 { NULL, 0 }
301 };
302
303 static struct lookup const leap_types[] = {
304 { "Rolling", TRUE },
305 { "Stationary", FALSE },
306 { NULL, 0 }
307 };
308
309 static const int len_months[2][MONSPERYEAR] = {
310 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
311 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
312 };
313
314 static const int len_years[2] = {
315 DAYSPERNYEAR, DAYSPERLYEAR
316 };
317
318 static time_t ats[TZ_MAX_TIMES];
319 static unsigned char types[TZ_MAX_TIMES];
320 static long gmtoffs[TZ_MAX_TYPES];
321 static char isdsts[TZ_MAX_TYPES];
322 static unsigned char abbrinds[TZ_MAX_TYPES];
323 static char ttisstds[TZ_MAX_TYPES];
324 static char chars[TZ_MAX_CHARS];
325 static time_t trans[TZ_MAX_LEAPS];
326 static long corr[TZ_MAX_LEAPS];
327 static char roll[TZ_MAX_LEAPS];
328
329 /*
330 ** Memory allocation.
331 */
332
333 static char *
334 memcheck(ptr)
335 char * const ptr;
336 {
337 if (ptr == NULL) {
338 (void) perror(progname);
339 (void) exit(EXIT_FAILURE);
340 }
341 return ptr;
342 }
343
344 #define emalloc(size) memcheck(imalloc(size))
345 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
346 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
347 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
348
349 /*
350 ** Error handling.
351 */
352
353 static void
354 eats(name, num, rname, rnum)
355 const char * const name;
356 const int num;
357 const char * const rname;
358 const int rnum;
359 {
360 filename = name;
361 linenum = num;
362 rfilename = rname;
363 rlinenum = rnum;
364 }
365
366 static void
367 eat(name, num)
368 const char * const name;
369 const int num;
370 {
371 eats(name, num, (char *) NULL, -1);
372 }
373
374 static void
375 error(string)
376 const char * const string;
377 {
378 /*
379 ** Match the format of "cc" to allow sh users to
380 ** zic ... 2>&1 | error -t "*" -v
381 ** on BSD systems.
382 */
383 (void) fprintf(stderr, "\"%s\", line %d: %s",
384 filename, linenum, string);
385 if (rfilename != NULL)
386 (void) fprintf(stderr, " (rule from \"%s\", line %d)",
387 rfilename, rlinenum);
388 (void) fprintf(stderr, "\n");
389 ++errors;
390 }
391
392 static void
393 usage P((void))
394 {
395 (void) fprintf(stderr,
396 "%s: usage is %s [ -s ] [ -v ] [ -l localtime ] [ -p posixrules ] [ -d directory ] \n\
397 \t[ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n",
398 progname, progname);
399 (void) exit(EXIT_FAILURE);
400 }
401
402 static const char * psxrules;
403 static const char * lcltime;
404 static const char * directory;
405 static const char * leapsec;
406 static const char * yitcommand;
407 static int sflag = FALSE;
408
409 int
410 main(argc, argv)
411 int argc;
412 char * argv[];
413 {
414 register int i, j;
415 register int c;
416
417 #ifdef unix
418 (void) umask(umask(022) | 022);
419 #endif /* defined unix */
420 progname = argv[0];
421 while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF)
422 switch (c) {
423 default:
424 usage();
425 case 'd':
426 if (directory == NULL)
427 directory = optarg;
428 else {
429 (void) fprintf(stderr,
430 "%s: More than one -d option specified\n",
431 progname);
432 (void) exit(EXIT_FAILURE);
433 }
434 break;
435 case 'l':
436 if (lcltime == NULL)
437 lcltime = optarg;
438 else {
439 (void) fprintf(stderr,
440 "%s: More than one -l option specified\n",
441 progname);
442 (void) exit(EXIT_FAILURE);
443 }
444 break;
445 case 'p':
446 if (psxrules == NULL)
447 psxrules = optarg;
448 else {
449 (void) fprintf(stderr,
450 "%s: More than one -p option specified\n",
451 progname);
452 (void) exit(EXIT_FAILURE);
453 }
454 break;
455 case 'y':
456 if (yitcommand == NULL)
457 yitcommand = optarg;
458 else {
459 (void) fprintf(stderr,
460 "%s: More than one -y option specified\n",
461 progname);
462 (void) exit(EXIT_FAILURE);
463 }
464 break;
465 case 'L':
466 if (leapsec == NULL)
467 leapsec = optarg;
468 else {
469 (void) fprintf(stderr,
470 "%s: More than one -L option specified\n",
471 progname);
472 (void) exit(EXIT_FAILURE);
473 }
474 break;
475 case 'v':
476 noise = TRUE;
477 break;
478 case 's':
479 sflag = TRUE;
480 break;
481 }
482 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
483 usage(); /* usage message by request */
484 if (directory == NULL)
485 directory = TZDIR;
486 if (yitcommand == NULL)
487 yitcommand = "yearistype";
488
489 setboundaries();
490
491 if (optind < argc && leapsec != NULL) {
492 infile(leapsec);
493 adjleap();
494 }
495
496 for (i = optind; i < argc; ++i)
497 infile(argv[i]);
498 if (errors)
499 (void) exit(EXIT_FAILURE);
500 associate();
501 for (i = 0; i < nzones; i = j) {
502 /*
503 ** Find the next non-continuation zone entry.
504 */
505 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
506 continue;
507 outzone(&zones[i], j - i);
508 }
509 /*
510 ** Make links.
511 */
512 for (i = 0; i < nlinks; ++i)
513 dolink(links[i].l_from, links[i].l_to);
514 if (lcltime != NULL)
515 dolink(lcltime, TZDEFAULT);
516 if (psxrules != NULL)
517 dolink(psxrules, TZDEFRULES);
518 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
519 }
520
521 static void
522 dolink(fromfile, tofile)
523 const char * const fromfile;
524 const char * const tofile;
525 {
526 register char * fromname;
527 register char * toname;
528
529 if (fromfile[0] == '/')
530 fromname = ecpyalloc(fromfile);
531 else {
532 fromname = ecpyalloc(directory);
533 fromname = ecatalloc(fromname, "/");
534 fromname = ecatalloc(fromname, fromfile);
535 }
536 if (tofile[0] == '/')
537 toname = ecpyalloc(tofile);
538 else {
539 toname = ecpyalloc(directory);
540 toname = ecatalloc(toname, "/");
541 toname = ecatalloc(toname, tofile);
542 }
543 /*
544 ** We get to be careful here since
545 ** there's a fair chance of root running us.
546 */
547 if (!itsdir(toname))
548 (void) remove(toname);
549 if (link(fromname, toname) != 0) {
550 if (mkdirs(toname) != 0)
551 (void) exit(EXIT_FAILURE);
552 if (link(fromname, toname) != 0) {
553 (void) fprintf(stderr, "%s: Can't link from %s to ",
554 progname, fromname);
555 (void) perror(toname);
556 (void) exit(EXIT_FAILURE);
557 }
558 }
559 ifree(fromname);
560 ifree(toname);
561 }
562
563 static void
564 setboundaries P((void))
565 {
566 register time_t bit;
567 register int bii;
568
569 for (bit = 1; bit > 0; bit <<= 1)
570 continue;
571 if (bit == 0) { /* time_t is an unsigned type */
572 tt_signed = FALSE;
573 min_time = 0;
574 max_time = ~(time_t) 0;
575 if (sflag)
576 max_time >>= 1;
577 } else {
578 tt_signed = TRUE;
579 min_time = bit;
580 max_time = bit;
581 ++max_time;
582 max_time = -max_time;
583 if (sflag)
584 min_time = 0;
585 }
586 min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
587 max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
588
589 for (bii = 1; bii > 0; bii <<= 1)
590 continue;
591 min_int = bii;
592 max_int = -1 - bii;
593 }
594
595 static int
596 itsdir(name)
597 const char * const name;
598 {
599 register char * myname;
600 register int accres;
601
602 myname = ecpyalloc(name);
603 myname = ecatalloc(myname, "/.");
604 accres = access(myname, 0);
605 ifree(myname);
606 return accres == 0;
607 }
608
609 /*
610 ** Associate sets of rules with zones.
611 */
612
613 /*
614 ** Sort by rule name.
615 */
616
617 static int
618 rcomp(cp1, cp2)
619 const genericptr_T cp1;
620 const genericptr_T cp2;
621 {
622 return strcmp(((struct rule *) cp1)->r_name,
623 ((struct rule *) cp2)->r_name);
624 }
625
626 static void
627 associate P((void))
628 {
629 register struct zone * zp;
630 register struct rule * rp;
631 register int base, out;
632 register int i;
633
634 if (nrules != 0)
635 (void) qsort((genericptr_T) rules,
636 (qsort_size_T) nrules,
637 (qsort_size_T) sizeof *rules, rcomp);
638 for (i = 0; i < nzones; ++i) {
639 zp = &zones[i];
640 zp->z_rules = NULL;
641 zp->z_nrules = 0;
642 }
643 for (base = 0; base < nrules; base = out) {
644 rp = &rules[base];
645 for (out = base + 1; out < nrules; ++out)
646 if (strcmp(rp->r_name, rules[out].r_name) != 0)
647 break;
648 for (i = 0; i < nzones; ++i) {
649 zp = &zones[i];
650 if (strcmp(zp->z_rule, rp->r_name) != 0)
651 continue;
652 zp->z_rules = rp;
653 zp->z_nrules = out - base;
654 }
655 }
656 for (i = 0; i < nzones; ++i) {
657 zp = &zones[i];
658 if (zp->z_nrules == 0) {
659 /*
660 ** Maybe we have a local standard time offset.
661 */
662 eat(zp->z_filename, zp->z_linenum);
663 zp->z_stdoff = gethms(zp->z_rule, "unruly zone", TRUE);
664 /*
665 ** Note, though, that if there's no rule,
666 ** a '%s' in the format is a bad thing.
667 */
668 if (strchr(zp->z_format, '%') != 0)
669 error("%s in ruleless zone");
670 }
671 }
672 if (errors)
673 (void) exit(EXIT_FAILURE);
674 }
675
676 static void
677 infile(name)
678 const char * name;
679 {
680 register FILE * fp;
681 register char ** fields;
682 register char * cp;
683 register const struct lookup * lp;
684 register int nfields;
685 register int wantcont;
686 register int num;
687 char buf[BUFSIZ];
688
689 if (strcmp(name, "-") == 0) {
690 name = "standard input";
691 fp = stdin;
692 } else if ((fp = fopen(name, "r")) == NULL) {
693 (void) fprintf(stderr, "%s: Can't open ", progname);
694 (void) perror(name);
695 (void) exit(EXIT_FAILURE);
696 }
697 wantcont = FALSE;
698 for (num = 1; ; ++num) {
699 eat(name, num);
700 if (fgets(buf, (int) sizeof buf, fp) != buf)
701 break;
702 cp = strchr(buf, '\n');
703 if (cp == NULL) {
704 error("line too long");
705 (void) exit(EXIT_FAILURE);
706 }
707 *cp = '\0';
708 fields = getfields(buf);
709 nfields = 0;
710 while (fields[nfields] != NULL) {
711 static char nada;
712
713 if (ciequal(fields[nfields], "-"))
714 fields[nfields] = &nada;
715 ++nfields;
716 }
717 if (nfields == 0) {
718 /* nothing to do */
719 } else if (wantcont) {
720 wantcont = inzcont(fields, nfields);
721 } else {
722 lp = byword(fields[0], line_codes);
723 if (lp == NULL)
724 error("input line of unknown type");
725 else switch ((int) (lp->l_value)) {
726 case LC_RULE:
727 inrule(fields, nfields);
728 wantcont = FALSE;
729 break;
730 case LC_ZONE:
731 wantcont = inzone(fields, nfields);
732 break;
733 case LC_LINK:
734 inlink(fields, nfields);
735 wantcont = FALSE;
736 break;
737 case LC_LEAP:
738 if (name != leapsec)
739 (void) fprintf(stderr,
740 "%s: Leap line in non leap seconds file %s\n",
741 progname, name);
742 else inleap(fields, nfields);
743 wantcont = FALSE;
744 break;
745 default: /* "cannot happen" */
746 (void) fprintf(stderr,
747 "%s: panic: Invalid l_value %d\n",
748 progname, lp->l_value);
749 (void) exit(EXIT_FAILURE);
750 }
751 }
752 ifree((char *) fields);
753 }
754 if (ferror(fp)) {
755 (void) fprintf(stderr, "%s: Error reading ", progname);
756 (void) perror(filename);
757 (void) exit(EXIT_FAILURE);
758 }
759 if (fp != stdin && fclose(fp)) {
760 (void) fprintf(stderr, "%s: Error closing ", progname);
761 (void) perror(filename);
762 (void) exit(EXIT_FAILURE);
763 }
764 if (wantcont)
765 error("expected continuation line not found");
766 }
767
768 /*
769 ** Convert a string of one of the forms
770 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
771 ** into a number of seconds.
772 ** A null string maps to zero.
773 ** Call error with errstring and return zero on errors.
774 */
775
776 static long
777 gethms(string, errstring, signable)
778 const char * string;
779 const char * const errstring;
780 const int signable;
781 {
782 int hh, mm, ss, sign;
783
784 if (string == NULL || *string == '\0')
785 return 0;
786 if (!signable)
787 sign = 1;
788 else if (*string == '-') {
789 sign = -1;
790 ++string;
791 } else sign = 1;
792 if (sscanf(string, scheck(string, "%d"), &hh) == 1)
793 mm = ss = 0;
794 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
795 ss = 0;
796 else if (sscanf(string, scheck(string, "%d:%d:%d"),
797 &hh, &mm, &ss) != 3) {
798 error(errstring);
799 return 0;
800 }
801 if (hh < 0 || hh >= HOURSPERDAY ||
802 mm < 0 || mm >= MINSPERHOUR ||
803 ss < 0 || ss > SECSPERMIN) {
804 error(errstring);
805 return 0;
806 }
807 return eitol(sign) *
808 (eitol(hh * MINSPERHOUR + mm) *
809 eitol(SECSPERMIN) + eitol(ss));
810 }
811
812 static void
813 inrule(fields, nfields)
814 register char ** const fields;
815 const int nfields;
816 {
817 static struct rule r;
818
819 if (nfields != RULE_FIELDS) {
820 error("wrong number of fields on Rule line");
821 return;
822 }
823 if (*fields[RF_NAME] == '\0') {
824 error("nameless rule");
825 return;
826 }
827 r.r_filename = filename;
828 r.r_linenum = linenum;
829 r.r_stdoff = gethms(fields[RF_STDOFF], "invalid saved time", TRUE);
830 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
831 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
832 r.r_name = ecpyalloc(fields[RF_NAME]);
833 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
834 rules = (struct rule *) (void *) erealloc((char *) rules,
835 (int) ((nrules + 1) * sizeof *rules));
836 rules[nrules++] = r;
837 }
838
839 static int
840 inzone(fields, nfields)
841 register char ** const fields;
842 const int nfields;
843 {
844 register int i;
845 static char * buf;
846
847 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
848 error("wrong number of fields on Zone line");
849 return FALSE;
850 }
851 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
852 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
853 (void) sprintf(buf,
854 "\"Zone %s\" line and -l option are mutually exclusive",
855 TZDEFAULT);
856 error(buf);
857 return FALSE;
858 }
859 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
860 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
861 (void) sprintf(buf,
862 "\"Zone %s\" line and -p option are mutually exclusive",
863 TZDEFRULES);
864 error(buf);
865 return FALSE;
866 }
867 for (i = 0; i < nzones; ++i)
868 if (zones[i].z_name != NULL &&
869 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
870 buf = erealloc(buf, (int) (132 +
871 strlen(fields[ZF_NAME]) +
872 strlen(zones[i].z_filename)));
873 (void) sprintf(buf,
874 "duplicate zone name %s (file \"%s\", line %d)",
875 fields[ZF_NAME],
876 zones[i].z_filename,
877 zones[i].z_linenum);
878 error(buf);
879 return FALSE;
880 }
881 return inzsub(fields, nfields, FALSE);
882 }
883
884 static int
885 inzcont(fields, nfields)
886 register char ** const fields;
887 const int nfields;
888 {
889 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
890 error("wrong number of fields on Zone continuation line");
891 return FALSE;
892 }
893 return inzsub(fields, nfields, TRUE);
894 }
895
896 static int
897 inzsub(fields, nfields, iscont)
898 register char ** const fields;
899 const int nfields;
900 const int iscont;
901 {
902 register char * cp;
903 static struct zone z;
904 register int i_gmtoff, i_rule, i_format;
905 register int i_untilyear, i_untilmonth;
906 register int i_untilday, i_untiltime;
907 register int hasuntil;
908
909 if (iscont) {
910 i_gmtoff = ZFC_GMTOFF;
911 i_rule = ZFC_RULE;
912 i_format = ZFC_FORMAT;
913 i_untilyear = ZFC_TILYEAR;
914 i_untilmonth = ZFC_TILMONTH;
915 i_untilday = ZFC_TILDAY;
916 i_untiltime = ZFC_TILTIME;
917 z.z_name = NULL;
918 } else {
919 i_gmtoff = ZF_GMTOFF;
920 i_rule = ZF_RULE;
921 i_format = ZF_FORMAT;
922 i_untilyear = ZF_TILYEAR;
923 i_untilmonth = ZF_TILMONTH;
924 i_untilday = ZF_TILDAY;
925 i_untiltime = ZF_TILTIME;
926 z.z_name = ecpyalloc(fields[ZF_NAME]);
927 }
928 z.z_filename = filename;
929 z.z_linenum = linenum;
930 z.z_gmtoff = gethms(fields[i_gmtoff], "invalid GMT offset", TRUE);
931 if ((cp = strchr(fields[i_format], '%')) != 0) {
932 if (*++cp != 's' || strchr(cp, '%') != 0) {
933 error("invalid abbreviation format");
934 return FALSE;
935 }
936 }
937 z.z_rule = ecpyalloc(fields[i_rule]);
938 z.z_format = ecpyalloc(fields[i_format]);
939 hasuntil = nfields > i_untilyear;
940 if (hasuntil) {
941 z.z_untilrule.r_filename = filename;
942 z.z_untilrule.r_linenum = linenum;
943 rulesub(&z.z_untilrule,
944 fields[i_untilyear],
945 "only",
946 "",
947 (nfields > i_untilmonth) ?
948 fields[i_untilmonth] : "Jan",
949 (nfields > i_untilday) ? fields[i_untilday] : "1",
950 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
951 z.z_untiltime = rpytime(&z.z_untilrule,
952 z.z_untilrule.r_loyear);
953 if (iscont && nzones > 0 &&
954 z.z_untiltime > min_time &&
955 z.z_untiltime < max_time &&
956 zones[nzones - 1].z_untiltime > min_time &&
957 zones[nzones - 1].z_untiltime < max_time &&
958 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
959 error("Zone continuation line end time is not after end time of previous line");
960 return FALSE;
961 }
962 }
963 zones = (struct zone *) (void *) erealloc((char *) zones,
964 (int) ((nzones + 1) * sizeof *zones));
965 zones[nzones++] = z;
966 /*
967 ** If there was an UNTIL field on this line,
968 ** there's more information about the zone on the next line.
969 */
970 return hasuntil;
971 }
972
973 static void
974 inleap(fields, nfields)
975 register char ** const fields;
976 const int nfields;
977 {
978 register const char * cp;
979 register const struct lookup * lp;
980 register int i, j;
981 int year, month, day;
982 long dayoff, tod;
983 time_t t;
984
985 if (nfields != LEAP_FIELDS) {
986 error("wrong number of fields on Leap line");
987 return;
988 }
989 dayoff = 0;
990 cp = fields[LP_YEAR];
991 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
992 /*
993 * Leapin' Lizards!
994 */
995 error("invalid leaping year");
996 return;
997 }
998 j = EPOCH_YEAR;
999 while (j != year) {
1000 if (year > j) {
1001 i = len_years[isleap(j)];
1002 ++j;
1003 } else {
1004 --j;
1005 i = -len_years[isleap(j)];
1006 }
1007 dayoff = oadd(dayoff, eitol(i));
1008 }
1009 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1010 error("invalid month name");
1011 return;
1012 }
1013 month = lp->l_value;
1014 j = TM_JANUARY;
1015 while (j != month) {
1016 i = len_months[isleap(year)][j];
1017 dayoff = oadd(dayoff, eitol(i));
1018 ++j;
1019 }
1020 cp = fields[LP_DAY];
1021 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1022 day <= 0 || day > len_months[isleap(year)][month]) {
1023 error("invalid day of month");
1024 return;
1025 }
1026 dayoff = oadd(dayoff, eitol(day - 1));
1027 if (dayoff < 0 && !tt_signed) {
1028 error("time before zero");
1029 return;
1030 }
1031 t = (time_t) dayoff * SECSPERDAY;
1032 /*
1033 ** Cheap overflow check.
1034 */
1035 if (t / SECSPERDAY != dayoff) {
1036 error("time overflow");
1037 return;
1038 }
1039 tod = gethms(fields[LP_TIME], "invalid time of day", FALSE);
1040 cp = fields[LP_CORR];
1041 {
1042 register int positive;
1043 int count;
1044
1045 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1046 positive = FALSE;
1047 count = 1;
1048 } else if (strcmp(cp, "--") == 0) {
1049 positive = FALSE;
1050 count = 2;
1051 } else if (strcmp(cp, "+") == 0) {
1052 positive = TRUE;
1053 count = 1;
1054 } else if (strcmp(cp, "++") == 0) {
1055 positive = TRUE;
1056 count = 2;
1057 } else {
1058 error("illegal CORRECTION field on Leap line");
1059 return;
1060 }
1061 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1062 error("illegal Rolling/Stationary field on Leap line");
1063 return;
1064 }
1065 leapadd(tadd(t, tod), positive, lp->l_value, count);
1066 }
1067 }
1068
1069 static void
1070 inlink(fields, nfields)
1071 register char ** const fields;
1072 const int nfields;
1073 {
1074 struct link l;
1075
1076 if (nfields != LINK_FIELDS) {
1077 error("wrong number of fields on Link line");
1078 return;
1079 }
1080 if (*fields[LF_FROM] == '\0') {
1081 error("blank FROM field on Link line");
1082 return;
1083 }
1084 if (*fields[LF_TO] == '\0') {
1085 error("blank TO field on Link line");
1086 return;
1087 }
1088 l.l_filename = filename;
1089 l.l_linenum = linenum;
1090 l.l_from = ecpyalloc(fields[LF_FROM]);
1091 l.l_to = ecpyalloc(fields[LF_TO]);
1092 links = (struct link *) (void *) erealloc((char *) links,
1093 (int) ((nlinks + 1) * sizeof *links));
1094 links[nlinks++] = l;
1095 }
1096
1097 static void
1098 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1099 register struct rule * const rp;
1100 const char * const loyearp;
1101 const char * const hiyearp;
1102 const char * const typep;
1103 const char * const monthp;
1104 const char * const dayp;
1105 const char * const timep;
1106 {
1107 register const struct lookup * lp;
1108 register const char * cp;
1109 register char * dp;
1110 register char * ep;
1111
1112 if ((lp = byword(monthp, mon_names)) == NULL) {
1113 error("invalid month name");
1114 return;
1115 }
1116 rp->r_month = lp->l_value;
1117 rp->r_todisstd = FALSE;
1118 rp->r_todisuniv = FALSE;
1119 dp = ecpyalloc(timep);
1120 if (*dp != '\0') {
1121 ep = dp + strlen(dp) - 1;
1122 switch (lowerit(*ep)) {
1123 case 's': /* Standard */
1124 rp->r_todisstd = TRUE;
1125 rp->r_todisuniv = FALSE;
1126 *ep = '\0';
1127 break;
1128 case 'w': /* Wall */
1129 rp->r_todisstd = FALSE;
1130 rp->r_todisuniv = FALSE;
1131 *ep = '\0';
1132 case 'g': /* Greenwich */
1133 case 'u': /* Universal */
1134 case 'z': /* Zulu */
1135 rp->r_todisstd = TRUE;
1136 rp->r_todisuniv = TRUE;
1137 *ep = '\0';
1138 break;
1139 }
1140 }
1141 rp->r_tod = gethms(dp, "invalid time of day", FALSE);
1142 ifree(dp);
1143 /*
1144 ** Year work.
1145 */
1146 cp = loyearp;
1147 if ((lp = byword(cp, begin_years)) != NULL) switch ((int) lp->l_value) {
1148 case YR_MINIMUM:
1149 rp->r_loyear = min_int;
1150 break;
1151 case YR_MAXIMUM:
1152 rp->r_loyear = max_int;
1153 break;
1154 default: /* "cannot happen" */
1155 (void) fprintf(stderr,
1156 "%s: panic: Invalid l_value %d\n",
1157 progname, lp->l_value);
1158 (void) exit(EXIT_FAILURE);
1159 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1160 error("invalid starting year");
1161 return;
1162 }
1163 cp = hiyearp;
1164 if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
1165 case YR_MINIMUM:
1166 rp->r_hiyear = min_int;
1167 break;
1168 case YR_MAXIMUM:
1169 rp->r_hiyear = max_int;
1170 break;
1171 case YR_ONLY:
1172 rp->r_hiyear = rp->r_loyear;
1173 break;
1174 default: /* "cannot happen" */
1175 (void) fprintf(stderr,
1176 "%s: panic: Invalid l_value %d\n",
1177 progname, lp->l_value);
1178 (void) exit(EXIT_FAILURE);
1179 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1180 error("invalid ending year");
1181 return;
1182 }
1183 if (rp->r_loyear > rp->r_hiyear) {
1184 error("starting year greater than ending year");
1185 return;
1186 }
1187 if (*typep == '\0')
1188 rp->r_yrtype = NULL;
1189 else {
1190 if (rp->r_loyear == rp->r_hiyear) {
1191 error("typed single year");
1192 return;
1193 }
1194 rp->r_yrtype = ecpyalloc(typep);
1195 }
1196 /*
1197 ** Day work.
1198 ** Accept things such as:
1199 ** 1
1200 ** last-Sunday
1201 ** Sun<=20
1202 ** Sun>=7
1203 */
1204 dp = ecpyalloc(dayp);
1205 if ((lp = byword(dp, lasts)) != NULL) {
1206 rp->r_dycode = DC_DOWLEQ;
1207 rp->r_wday = lp->l_value;
1208 rp->r_dayofmonth = len_months[1][rp->r_month];
1209 } else {
1210 if ((ep = strchr(dp, '<')) != 0)
1211 rp->r_dycode = DC_DOWLEQ;
1212 else if ((ep = strchr(dp, '>')) != 0)
1213 rp->r_dycode = DC_DOWGEQ;
1214 else {
1215 ep = dp;
1216 rp->r_dycode = DC_DOM;
1217 }
1218 if (rp->r_dycode != DC_DOM) {
1219 *ep++ = 0;
1220 if (*ep++ != '=') {
1221 error("invalid day of month");
1222 ifree(dp);
1223 return;
1224 }
1225 if ((lp = byword(dp, wday_names)) == NULL) {
1226 error("invalid weekday name");
1227 ifree(dp);
1228 return;
1229 }
1230 rp->r_wday = lp->l_value;
1231 }
1232 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1233 rp->r_dayofmonth <= 0 ||
1234 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1235 error("invalid day of month");
1236 ifree(dp);
1237 return;
1238 }
1239 }
1240 ifree(dp);
1241 }
1242
1243 static void
1244 convert(val, buf)
1245 const long val;
1246 char * const buf;
1247 {
1248 register int i;
1249 register long shift;
1250
1251 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1252 buf[i] = val >> shift;
1253 }
1254
1255 static void
1256 puttzcode(val, fp)
1257 const long val;
1258 FILE * const fp;
1259 {
1260 char buf[4];
1261
1262 convert(val, buf);
1263 (void) fwrite((genericptr_T) buf,
1264 (fwrite_size_T) sizeof buf,
1265 (fwrite_size_T) 1, fp);
1266 }
1267
1268 static void
1269 writezone(name)
1270 const char * const name;
1271 {
1272 register FILE * fp;
1273 register int i, j;
1274 static char * fullname;
1275 static struct tzhead tzh;
1276
1277 fullname = erealloc(fullname,
1278 (int) (strlen(directory) + 1 + strlen(name) + 1));
1279 (void) sprintf(fullname, "%s/%s", directory, name);
1280 if ((fp = fopen(fullname, "wb")) == NULL) {
1281 if (mkdirs(fullname) != 0)
1282 (void) exit(EXIT_FAILURE);
1283 if ((fp = fopen(fullname, "wb")) == NULL) {
1284 (void) fprintf(stderr, "%s: Can't create ", progname);
1285 (void) perror(fullname);
1286 (void) exit(EXIT_FAILURE);
1287 }
1288 }
1289 convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1290 convert(eitol(leapcnt), tzh.tzh_leapcnt);
1291 convert(eitol(timecnt), tzh.tzh_timecnt);
1292 convert(eitol(typecnt), tzh.tzh_typecnt);
1293 convert(eitol(charcnt), tzh.tzh_charcnt);
1294 (void) fwrite((genericptr_T) &tzh,
1295 (fwrite_size_T) sizeof tzh,
1296 (fwrite_size_T) 1, fp);
1297 for (i = 0; i < timecnt; ++i) {
1298 j = leapcnt;
1299 while (--j >= 0)
1300 if (ats[i] >= trans[j]) {
1301 ats[i] = tadd(ats[i], corr[j]);
1302 break;
1303 }
1304 puttzcode((long) ats[i], fp);
1305 }
1306 if (timecnt > 0)
1307 (void) fwrite((genericptr_T) types,
1308 (fwrite_size_T) sizeof types[0],
1309 (fwrite_size_T) timecnt, fp);
1310 for (i = 0; i < typecnt; ++i) {
1311 puttzcode((long) gmtoffs[i], fp);
1312 (void) putc(isdsts[i], fp);
1313 (void) putc(abbrinds[i], fp);
1314 }
1315 if (charcnt != 0)
1316 (void) fwrite((genericptr_T) chars,
1317 (fwrite_size_T) sizeof chars[0],
1318 (fwrite_size_T) charcnt, fp);
1319 for (i = 0; i < leapcnt; ++i) {
1320 if (roll[i]) {
1321 if (timecnt == 0 || trans[i] < ats[0]) {
1322 j = 0;
1323 while (isdsts[j])
1324 if (++j >= typecnt) {
1325 j = 0;
1326 break;
1327 }
1328 } else {
1329 j = 1;
1330 while (j < timecnt && trans[i] >= ats[j])
1331 ++j;
1332 j = types[j - 1];
1333 }
1334 puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
1335 } else puttzcode((long) trans[i], fp);
1336 puttzcode((long) corr[i], fp);
1337 }
1338 for (i = 0; i < typecnt; ++i)
1339 (void) putc(ttisstds[i], fp);
1340 if (ferror(fp) || fclose(fp)) {
1341 (void) fprintf(stderr, "%s: Write error on ", progname);
1342 (void) perror(fullname);
1343 (void) exit(EXIT_FAILURE);
1344 }
1345 }
1346
1347 static void
1348 outzone(zpfirst, zonecount)
1349 const struct zone * const zpfirst;
1350 const int zonecount;
1351 {
1352 register const struct zone * zp;
1353 register struct rule * rp;
1354 register int i, j;
1355 register int usestart, useuntil;
1356 register time_t starttime, untiltime;
1357 register long gmtoff;
1358 register long stdoff;
1359 register int year;
1360 register long startoff;
1361 register int startisdst;
1362 register int startttisstd;
1363 register int type;
1364 char startbuf[BUFSIZ];
1365
1366 INITIALIZE(untiltime);
1367 INITIALIZE(starttime);
1368 INITIALIZE(startoff);
1369 /*
1370 ** Now. . .finally. . .generate some useful data!
1371 */
1372 timecnt = 0;
1373 typecnt = 0;
1374 charcnt = 0;
1375 /*
1376 ** A guess that may well be corrected later.
1377 */
1378 stdoff = 0;
1379 /*
1380 ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
1381 ** for noting the need to unconditionally initialize startttisstd.
1382 */
1383 startttisstd = FALSE;
1384 #ifdef lint
1385 starttime = 0;
1386 #endif /* defined lint */
1387 for (i = 0; i < zonecount; ++i) {
1388 zp = &zpfirst[i];
1389 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1390 useuntil = i < (zonecount - 1);
1391 if (useuntil && zp->z_untiltime <= min_time)
1392 continue;
1393 gmtoff = zp->z_gmtoff;
1394 eat(zp->z_filename, zp->z_linenum);
1395 startisdst = -1;
1396 if (zp->z_nrules == 0) {
1397 stdoff = zp->z_stdoff;
1398 (void) strcpy(startbuf, zp->z_format);
1399 type = addtype(oadd(zp->z_gmtoff, stdoff),
1400 startbuf, stdoff != 0, startttisstd);
1401 if (usestart)
1402 addtt(starttime, type);
1403 else if (stdoff != 0)
1404 addtt(min_time, type);
1405 } else for (year = min_year; year <= max_year; ++year) {
1406 if (useuntil && year > zp->z_untilrule.r_hiyear)
1407 break;
1408 /*
1409 ** Mark which rules to do in the current year.
1410 ** For those to do, calculate rpytime(rp, year);
1411 */
1412 for (j = 0; j < zp->z_nrules; ++j) {
1413 rp = &zp->z_rules[j];
1414 eats(zp->z_filename, zp->z_linenum,
1415 rp->r_filename, rp->r_linenum);
1416 rp->r_todo = year >= rp->r_loyear &&
1417 year <= rp->r_hiyear &&
1418 yearistype(year, rp->r_yrtype);
1419 if (rp->r_todo)
1420 rp->r_temp = rpytime(rp, year);
1421 }
1422 for ( ; ; ) {
1423 register int k;
1424 register time_t jtime, ktime;
1425 register long offset;
1426 char buf[BUFSIZ];
1427
1428 INITIALIZE(ktime);
1429 if (useuntil) {
1430 /*
1431 ** Turn untiltime into GMT
1432 ** assuming the current gmtoff and
1433 ** stdoff values.
1434 */
1435 untiltime = zp->z_untiltime;
1436 if (!zp->z_untilrule.r_todisuniv)
1437 untiltime = tadd(untiltime,
1438 -gmtoff);
1439 if (!zp->z_untilrule.r_todisstd)
1440 untiltime = tadd(untiltime,
1441 -stdoff);
1442 }
1443 /*
1444 ** Find the rule (of those to do, if any)
1445 ** that takes effect earliest in the year.
1446 */
1447 k = -1;
1448 #ifdef lint
1449 ktime = 0;
1450 #endif /* defined lint */
1451 for (j = 0; j < zp->z_nrules; ++j) {
1452 rp = &zp->z_rules[j];
1453 if (!rp->r_todo)
1454 continue;
1455 eats(zp->z_filename, zp->z_linenum,
1456 rp->r_filename, rp->r_linenum);
1457 offset = rp->r_todisuniv ? 0 : gmtoff;
1458 if (!rp->r_todisstd)
1459 offset = oadd(offset, stdoff);
1460 jtime = rp->r_temp;
1461 if (jtime == min_time ||
1462 jtime == max_time)
1463 continue;
1464 jtime = tadd(jtime, -offset);
1465 if (k < 0 || jtime < ktime) {
1466 k = j;
1467 ktime = jtime;
1468 }
1469 }
1470 if (k < 0)
1471 break; /* go on to next year */
1472 rp = &zp->z_rules[k];
1473 rp->r_todo = FALSE;
1474 if (useuntil && ktime >= untiltime)
1475 break;
1476 if (usestart) {
1477 if (ktime < starttime) {
1478 stdoff = rp->r_stdoff;
1479 startoff = oadd(zp->z_gmtoff,
1480 rp->r_stdoff);
1481 (void) sprintf(startbuf, zp->z_format,
1482 rp->r_abbrvar);
1483 startisdst = rp->r_stdoff != 0;
1484 continue;
1485 }
1486 usestart = FALSE;
1487 if (ktime != starttime) {
1488 if (startisdst < 0 &&
1489 zp->z_gmtoff !=
1490 (zp - 1)->z_gmtoff) {
1491 type = (timecnt == 0) ? 0 :
1492 types[timecnt - 1];
1493 startoff = oadd(gmtoffs[type],
1494 -(zp - 1)->z_gmtoff);
1495 startisdst = startoff != 0;
1496 startoff = oadd(startoff,
1497 zp->z_gmtoff);
1498 (void) strcpy(startbuf,
1499 &chars[abbrinds[type]]);
1500 }
1501 if (startisdst >= 0)
1502 addtt(starttime, addtype(startoff, startbuf, startisdst, startttisstd));
1503 }
1504 }
1505 eats(zp->z_filename, zp->z_linenum,
1506 rp->r_filename, rp->r_linenum);
1507 (void) sprintf(buf, zp->z_format,
1508 rp->r_abbrvar);
1509 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
1510 type = addtype(offset, buf, rp->r_stdoff != 0,
1511 rp->r_todisstd);
1512 addtt(ktime, type);
1513 stdoff = rp->r_stdoff;
1514 }
1515 }
1516 /*
1517 ** Now we may get to set starttime for the next zone line.
1518 */
1519 if (useuntil) {
1520 starttime = tadd(zp->z_untiltime, -gmtoff);
1521 startttisstd = zp->z_untilrule.r_todisstd;
1522 if (!startttisstd)
1523 starttime = tadd(starttime, -stdoff);
1524 }
1525 }
1526 writezone(zpfirst->z_name);
1527 }
1528
1529 static void
1530 addtt(starttime, type)
1531 const time_t starttime;
1532 const int type;
1533 {
1534 if (timecnt != 0 && type == types[timecnt - 1])
1535 return; /* easy enough! */
1536 if (timecnt == 0 && type == 0 && isdsts[0] == 0)
1537 return; /* handled by default rule */
1538 if (timecnt >= TZ_MAX_TIMES) {
1539 error("too many transitions?!");
1540 (void) exit(EXIT_FAILURE);
1541 }
1542 ats[timecnt] = starttime;
1543 types[timecnt] = type;
1544 ++timecnt;
1545 }
1546
1547 static int
1548 addtype(gmtoff, abbr, isdst, ttisstd)
1549 const long gmtoff;
1550 const char * const abbr;
1551 const int isdst;
1552 const int ttisstd;
1553 {
1554 register int i, j;
1555
1556 /*
1557 ** See if there's already an entry for this zone type.
1558 ** If so, just return its index.
1559 */
1560 for (i = 0; i < typecnt; ++i) {
1561 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1562 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1563 ttisstd == ttisstds[i])
1564 return i;
1565 }
1566 /*
1567 ** There isn't one; add a new one, unless there are already too
1568 ** many.
1569 */
1570 if (typecnt >= TZ_MAX_TYPES) {
1571 error("too many local time types");
1572 (void) exit(EXIT_FAILURE);
1573 }
1574 gmtoffs[i] = gmtoff;
1575 isdsts[i] = isdst;
1576 ttisstds[i] = ttisstd;
1577
1578 for (j = 0; j < charcnt; ++j)
1579 if (strcmp(&chars[j], abbr) == 0)
1580 break;
1581 if (j == charcnt)
1582 newabbr(abbr);
1583 abbrinds[i] = j;
1584 ++typecnt;
1585 return i;
1586 }
1587
1588 static void
1589 leapadd(t, positive, rolling, count)
1590 const time_t t;
1591 const int positive;
1592 const int rolling;
1593 int count;
1594 {
1595 register int i, j;
1596
1597 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1598 error("too many leap seconds");
1599 (void) exit(EXIT_FAILURE);
1600 }
1601 for (i = 0; i < leapcnt; ++i)
1602 if (t <= trans[i]) {
1603 if (t == trans[i]) {
1604 error("repeated leap second moment");
1605 (void) exit(EXIT_FAILURE);
1606 }
1607 break;
1608 }
1609 do {
1610 for (j = leapcnt; j > i; --j) {
1611 trans[j] = trans[j - 1];
1612 corr[j] = corr[j - 1];
1613 roll[j] = roll[j - 1];
1614 }
1615 trans[i] = t;
1616 corr[i] = positive ? 1L : eitol(-count);
1617 roll[i] = rolling;
1618 ++leapcnt;
1619 } while (positive && --count != 0);
1620 }
1621
1622 static void
1623 adjleap P((void))
1624 {
1625 register int i;
1626 register long last = 0;
1627
1628 /*
1629 ** propagate leap seconds forward
1630 */
1631 for (i = 0; i < leapcnt; ++i) {
1632 trans[i] = tadd(trans[i], last);
1633 last = corr[i] += last;
1634 }
1635 }
1636
1637 static int
1638 yearistype(year, type)
1639 const int year;
1640 const char * const type;
1641 {
1642 static char * buf;
1643 int result;
1644
1645 if (type == NULL || *type == '\0')
1646 return TRUE;
1647 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
1648 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
1649 result = system(buf);
1650 if (result == 0)
1651 return TRUE;
1652 if (result == (1 << 8))
1653 return FALSE;
1654 error("Wild result from command execution");
1655 (void) fprintf(stderr, "%s: command was '%s', result was %d\n",
1656 progname, buf, result);
1657 for ( ; ; )
1658 (void) exit(EXIT_FAILURE);
1659 }
1660
1661 static int
1662 lowerit(a)
1663 const int a;
1664 {
1665 return (isascii(a) && isupper(a)) ? tolower(a) : a;
1666 }
1667
1668 static int
1669 ciequal(ap, bp) /* case-insensitive equality */
1670 register const char * ap;
1671 register const char * bp;
1672 {
1673 while (lowerit(*ap) == lowerit(*bp++))
1674 if (*ap++ == '\0')
1675 return TRUE;
1676 return FALSE;
1677 }
1678
1679 static int
1680 itsabbr(abbr, word)
1681 register const char * abbr;
1682 register const char * word;
1683 {
1684 if (lowerit(*abbr) != lowerit(*word))
1685 return FALSE;
1686 ++word;
1687 while (*++abbr != '\0')
1688 do if (*word == '\0')
1689 return FALSE;
1690 while (lowerit(*word++) != lowerit(*abbr));
1691 return TRUE;
1692 }
1693
1694 static const struct lookup *
1695 byword(word, table)
1696 register const char * const word;
1697 register const struct lookup * const table;
1698 {
1699 register const struct lookup * foundlp;
1700 register const struct lookup * lp;
1701
1702 if (word == NULL || table == NULL)
1703 return NULL;
1704 /*
1705 ** Look for exact match.
1706 */
1707 for (lp = table; lp->l_word != NULL; ++lp)
1708 if (ciequal(word, lp->l_word))
1709 return lp;
1710 /*
1711 ** Look for inexact match.
1712 */
1713 foundlp = NULL;
1714 for (lp = table; lp->l_word != NULL; ++lp)
1715 if (itsabbr(word, lp->l_word))
1716 if (foundlp == NULL)
1717 foundlp = lp;
1718 else return NULL; /* multiple inexact matches */
1719 return foundlp;
1720 }
1721
1722 static char **
1723 getfields(cp)
1724 register char * cp;
1725 {
1726 register char * dp;
1727 register char ** array;
1728 register int nsubs;
1729
1730 if (cp == NULL)
1731 return NULL;
1732 array = (char **) (void *)
1733 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
1734 nsubs = 0;
1735 for ( ; ; ) {
1736 while (isascii(*cp) && isspace(*cp))
1737 ++cp;
1738 if (*cp == '\0' || *cp == '#')
1739 break;
1740 array[nsubs++] = dp = cp;
1741 do {
1742 if ((*dp = *cp++) != '"')
1743 ++dp;
1744 else while ((*dp = *cp++) != '"')
1745 if (*dp != '\0')
1746 ++dp;
1747 else error("Odd number of quotation marks");
1748 } while (*cp != '\0' && *cp != '#' &&
1749 (!isascii(*cp) || !isspace(*cp)));
1750 if (isascii(*cp) && isspace(*cp))
1751 ++cp;
1752 *dp = '\0';
1753 }
1754 array[nsubs] = NULL;
1755 return array;
1756 }
1757
1758 static long
1759 oadd(t1, t2)
1760 const long t1;
1761 const long t2;
1762 {
1763 register long t;
1764
1765 t = t1 + t2;
1766 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1767 error("time overflow");
1768 (void) exit(EXIT_FAILURE);
1769 }
1770 return t;
1771 }
1772
1773 static time_t
1774 tadd(t1, t2)
1775 const time_t t1;
1776 const long t2;
1777 {
1778 register time_t t;
1779
1780 if (t1 == max_time && t2 > 0)
1781 return max_time;
1782 if (t1 == min_time && t2 < 0)
1783 return min_time;
1784 t = t1 + t2;
1785 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1786 error("time overflow");
1787 (void) exit(EXIT_FAILURE);
1788 }
1789 return t;
1790 }
1791
1792 /*
1793 ** Given a rule, and a year, compute the date - in seconds since January 1,
1794 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
1795 */
1796
1797 static time_t
1798 rpytime(rp, wantedy)
1799 register const struct rule * const rp;
1800 register const int wantedy;
1801 {
1802 register int y, m, i;
1803 register long dayoff; /* with a nod to Margaret O. */
1804 register time_t t;
1805
1806 if (wantedy == min_int)
1807 return min_time;
1808 if (wantedy == max_int)
1809 return max_time;
1810 dayoff = 0;
1811 m = TM_JANUARY;
1812 y = EPOCH_YEAR;
1813 while (wantedy != y) {
1814 if (wantedy > y) {
1815 i = len_years[isleap(y)];
1816 ++y;
1817 } else {
1818 --y;
1819 i = -len_years[isleap(y)];
1820 }
1821 dayoff = oadd(dayoff, eitol(i));
1822 }
1823 while (m != rp->r_month) {
1824 i = len_months[isleap(y)][m];
1825 dayoff = oadd(dayoff, eitol(i));
1826 ++m;
1827 }
1828 i = rp->r_dayofmonth;
1829 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
1830 if (rp->r_dycode == DC_DOWLEQ)
1831 --i;
1832 else {
1833 error("use of 2/29 in non leap-year");
1834 (void) exit(EXIT_FAILURE);
1835 }
1836 }
1837 --i;
1838 dayoff = oadd(dayoff, eitol(i));
1839 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
1840 register long wday;
1841
1842 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
1843 wday = eitol(EPOCH_WDAY);
1844 /*
1845 ** Don't trust mod of negative numbers.
1846 */
1847 if (dayoff >= 0)
1848 wday = (wday + dayoff) % LDAYSPERWEEK;
1849 else {
1850 wday -= ((-dayoff) % LDAYSPERWEEK);
1851 if (wday < 0)
1852 wday += LDAYSPERWEEK;
1853 }
1854 while (wday != eitol(rp->r_wday))
1855 if (rp->r_dycode == DC_DOWGEQ) {
1856 dayoff = oadd(dayoff, (long) 1);
1857 if (++wday >= LDAYSPERWEEK)
1858 wday = 0;
1859 ++i;
1860 } else {
1861 dayoff = oadd(dayoff, (long) -1);
1862 if (--wday < 0)
1863 wday = LDAYSPERWEEK - 1;
1864 --i;
1865 }
1866 if (i < 0 || i >= len_months[isleap(y)][m]) {
1867 error("no day in month matches rule");
1868 (void) exit(EXIT_FAILURE);
1869 }
1870 }
1871 if (dayoff < 0 && !tt_signed)
1872 return min_time;
1873 t = (time_t) dayoff * SECSPERDAY;
1874 /*
1875 ** Cheap overflow check.
1876 */
1877 if (t / SECSPERDAY != dayoff)
1878 return (dayoff > 0) ? max_time : min_time;
1879 return tadd(t, rp->r_tod);
1880 }
1881
1882 static void
1883 newabbr(string)
1884 const char * const string;
1885 {
1886 register int i;
1887
1888 i = strlen(string) + 1;
1889 if (charcnt + i > TZ_MAX_CHARS) {
1890 error("too many, or too long, time zone abbreviations");
1891 (void) exit(EXIT_FAILURE);
1892 }
1893 (void) strcpy(&chars[charcnt], string);
1894 charcnt += eitol(i);
1895 }
1896
1897 static int
1898 mkdirs(argname)
1899 char * const argname;
1900 {
1901 register char * name;
1902 register char * cp;
1903
1904 if (argname == NULL || *argname == '\0')
1905 return 0;
1906 cp = name = ecpyalloc(argname);
1907 while ((cp = strchr(cp + 1, '/')) != 0) {
1908 *cp = '\0';
1909 #ifndef unix
1910 /*
1911 ** MS-DOS drive specifier?
1912 */
1913 if (strlen(name) == 2 && isascii(name[0]) &&
1914 isalpha(name[0]) && name[1] == ':') {
1915 *cp = '/';
1916 continue;
1917 }
1918 #endif /* !defined unix */
1919 if (!itsdir(name)) {
1920 /*
1921 ** It doesn't seem to exist, so we try to create it.
1922 */
1923 if (emkdir(name, 0755) != 0) {
1924 (void) fprintf(stderr,
1925 "%s: Can't create directory ",
1926 progname);
1927 (void) perror(name);
1928 ifree(name);
1929 return -1;
1930 }
1931 }
1932 *cp = '/';
1933 }
1934 ifree(name);
1935 return 0;
1936 }
1937
1938 static long
1939 eitol(i)
1940 const int i;
1941 {
1942 long l;
1943
1944 l = i;
1945 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
1946 (void) fprintf(stderr,
1947 "%s: %d did not sign extend correctly\n",
1948 progname, i);
1949 (void) exit(EXIT_FAILURE);
1950 }
1951 return l;
1952 }
1953
1954 /*
1955 ** UNIX was a registered trademark of UNIX System Laboratories in 1993.
1956 */
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