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2.10.90-18
[glibc.git] / timezone / zic.c
blob76df6532a77fecdb53ff61ae92587e0cfb291ea9
1 /*
2 ** This file is in the public domain, so clarified as of
3 ** 2006-07-17 by Arthur David Olson.
4 */
5
6 static char elsieid[] = "@(#)zic.c 8.19";
7
8 #include "private.h"
9 #include "locale.h"
10 #include "tzfile.h"
11
12 #define ZIC_VERSION '2'
13
14 typedef int_fast64_t zic_t;
15
16 #ifndef ZIC_MAX_ABBR_LEN_WO_WARN
17 #define ZIC_MAX_ABBR_LEN_WO_WARN 6
18 #endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */
19
20 #if HAVE_SYS_STAT_H
21 #include "sys/stat.h"
22 #endif
23 #ifdef S_IRUSR
24 #define MKDIR_UMASK (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
25 #else
26 #define MKDIR_UMASK 0755
27 #endif
28
29 /*
30 ** On some ancient hosts, predicates like `isspace(C)' are defined
31 ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard,
32 ** which says they are defined only if C == ((unsigned char) C) || C == EOF.
33 ** Neither the C Standard nor Posix require that `isascii' exist.
34 ** For portability, we check both ancient and modern requirements.
35 ** If isascii is not defined, the isascii check succeeds trivially.
36 */
37 #include "ctype.h"
38 #ifndef isascii
39 #define isascii(x) 1
40 #endif
41
42 #define OFFSET_STRLEN_MAXIMUM (7 + INT_STRLEN_MAXIMUM(long))
43 #define RULE_STRLEN_MAXIMUM 8 /* "Mdd.dd.d" */
44
45 #define end(cp) (strchr((cp), '\0'))
46
47 struct rule {
48 const char * r_filename;
49 int r_linenum;
50 const char * r_name;
51
52 int r_loyear; /* for example, 1986 */
53 int r_hiyear; /* for example, 1986 */
54 const char * r_yrtype;
55 int r_lowasnum;
56 int r_hiwasnum;
57
58 int r_month; /* 0..11 */
59
60 int r_dycode; /* see below */
61 int r_dayofmonth;
62 int r_wday;
63
64 long r_tod; /* time from midnight */
65 int r_todisstd; /* above is standard time if TRUE */
66 /* or wall clock time if FALSE */
67 int r_todisgmt; /* above is GMT if TRUE */
68 /* or local time if FALSE */
69 long r_stdoff; /* offset from standard time */
70 const char * r_abbrvar; /* variable part of abbreviation */
71
72 int r_todo; /* a rule to do (used in outzone) */
73 zic_t r_temp; /* used in outzone */
74 };
75
76 /*
77 ** r_dycode r_dayofmonth r_wday
78 */
79
80 #define DC_DOM 0 /* 1..31 */ /* unused */
81 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
82 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
83
84 struct zone {
85 const char * z_filename;
86 int z_linenum;
87
88 const char * z_name;
89 long z_gmtoff;
90 const char * z_rule;
91 const char * z_format;
92
93 long z_stdoff;
94
95 struct rule * z_rules;
96 int z_nrules;
97
98 struct rule z_untilrule;
99 zic_t z_untiltime;
100 };
101
102 extern int getopt(int argc, char * const argv[],
103 const char * options);
104 extern int link(const char * fromname, const char * toname);
105 extern char * optarg;
106 extern int optind;
107
108 static void addtt(zic_t starttime, int type);
109 static int addtype(long gmtoff, const char * abbr, int isdst,
110 int ttisstd, int ttisgmt);
111 static void leapadd(zic_t t, int positive, int rolling, int count);
112 static void adjleap(void);
113 static void associate(void);
114 static int ciequal(const char * ap, const char * bp);
115 static void convert(long val, char * buf);
116 static void convert64(zic_t val, char * buf);
117 static void dolink(const char * fromfield, const char * tofield);
118 static void doabbr(char * abbr, const char * format,
119 const char * letters, int isdst, int doquotes);
120 static void eat(const char * name, int num);
121 static void eats(const char * name, int num,
122 const char * rname, int rnum);
123 static long eitol(int i);
124 static void error(const char * message);
125 static char ** getfields(char * buf);
126 static long gethms(const char * string, const char * errstrng,
127 int signable);
128 static void infile(const char * filename);
129 static void inleap(char ** fields, int nfields);
130 static void inlink(char ** fields, int nfields);
131 static void inrule(char ** fields, int nfields);
132 static int inzcont(char ** fields, int nfields);
133 static int inzone(char ** fields, int nfields);
134 static int inzsub(char ** fields, int nfields, int iscont);
135 static int is32(zic_t x);
136 static int itsabbr(const char * abbr, const char * word);
137 static int itsdir(const char * name);
138 static int lowerit(int c);
139 static char * memcheck(char * tocheck);
140 static int mkdirs(char * filename);
141 static void newabbr(const char * abbr);
142 static long oadd(long t1, long t2);
143 static void outzone(const struct zone * zp, int ntzones);
144 static void puttzcode(long code, FILE * fp);
145 static void puttzcode64(zic_t code, FILE * fp);
146 static int rcomp(const void * leftp, const void * rightp);
147 static zic_t rpytime(const struct rule * rp, int wantedy);
148 static void rulesub(struct rule * rp,
149 const char * loyearp, const char * hiyearp,
150 const char * typep, const char * monthp,
151 const char * dayp, const char * timep);
152 static int stringoffset(char * result, long offset);
153 static int stringrule(char * result, const struct rule * rp,
154 long dstoff, long gmtoff);
155 static void stringzone(char * result,
156 const struct zone * zp, int ntzones);
157 static void setboundaries(void);
158 static zic_t tadd(zic_t t1, long t2);
159 static void usage(FILE *stream, int status);
160 static void writezone(const char * name, const char * string);
161 static int yearistype(int year, const char * type);
162
163 static int charcnt;
164 static int errors;
165 static const char * filename;
166 static int leapcnt;
167 static int leapseen;
168 static int leapminyear;
169 static int leapmaxyear;
170 static int linenum;
171 static int max_abbrvar_len;
172 static int max_format_len;
173 static zic_t max_time;
174 static int max_year;
175 static zic_t min_time;
176 static int min_year;
177 static int noise;
178 static const char * rfilename;
179 static int rlinenum;
180 static const char * progname;
181 static int timecnt;
182 static int typecnt;
183
184 /*
185 ** Line codes.
186 */
187
188 #define LC_RULE 0
189 #define LC_ZONE 1
190 #define LC_LINK 2
191 #define LC_LEAP 3
192
193 /*
194 ** Which fields are which on a Zone line.
195 */
196
197 #define ZF_NAME 1
198 #define ZF_GMTOFF 2
199 #define ZF_RULE 3
200 #define ZF_FORMAT 4
201 #define ZF_TILYEAR 5
202 #define ZF_TILMONTH 6
203 #define ZF_TILDAY 7
204 #define ZF_TILTIME 8
205 #define ZONE_MINFIELDS 5
206 #define ZONE_MAXFIELDS 9
207
208 /*
209 ** Which fields are which on a Zone continuation line.
210 */
211
212 #define ZFC_GMTOFF 0
213 #define ZFC_RULE 1
214 #define ZFC_FORMAT 2
215 #define ZFC_TILYEAR 3
216 #define ZFC_TILMONTH 4
217 #define ZFC_TILDAY 5
218 #define ZFC_TILTIME 6
219 #define ZONEC_MINFIELDS 3
220 #define ZONEC_MAXFIELDS 7
221
222 /*
223 ** Which files are which on a Rule line.
224 */
225
226 #define RF_NAME 1
227 #define RF_LOYEAR 2
228 #define RF_HIYEAR 3
229 #define RF_COMMAND 4
230 #define RF_MONTH 5
231 #define RF_DAY 6
232 #define RF_TOD 7
233 #define RF_STDOFF 8
234 #define RF_ABBRVAR 9
235 #define RULE_FIELDS 10
236
237 /*
238 ** Which fields are which on a Link line.
239 */
240
241 #define LF_FROM 1
242 #define LF_TO 2
243 #define LINK_FIELDS 3
244
245 /*
246 ** Which fields are which on a Leap line.
247 */
248
249 #define LP_YEAR 1
250 #define LP_MONTH 2
251 #define LP_DAY 3
252 #define LP_TIME 4
253 #define LP_CORR 5
254 #define LP_ROLL 6
255 #define LEAP_FIELDS 7
256
257 /*
258 ** Year synonyms.
259 */
260
261 #define YR_MINIMUM 0
262 #define YR_MAXIMUM 1
263 #define YR_ONLY 2
264
265 static struct rule * rules;
266 static int nrules; /* number of rules */
267
268 static struct zone * zones;
269 static int nzones; /* number of zones */
270
271 struct link {
272 const char * l_filename;
273 int l_linenum;
274 const char * l_from;
275 const char * l_to;
276 };
277
278 static struct link * links;
279 static int nlinks;
280
281 struct lookup {
282 const char * l_word;
283 const int l_value;
284 };
285
286 static struct lookup const * byword(const char * string,
287 const struct lookup * lp);
288
289 static struct lookup const line_codes[] = {
290 { "Rule", LC_RULE },
291 { "Zone", LC_ZONE },
292 { "Link", LC_LINK },
293 { "Leap", LC_LEAP },
294 { NULL, 0}
295 };
296
297 static struct lookup const mon_names[] = {
298 { "January", TM_JANUARY },
299 { "February", TM_FEBRUARY },
300 { "March", TM_MARCH },
301 { "April", TM_APRIL },
302 { "May", TM_MAY },
303 { "June", TM_JUNE },
304 { "July", TM_JULY },
305 { "August", TM_AUGUST },
306 { "September", TM_SEPTEMBER },
307 { "October", TM_OCTOBER },
308 { "November", TM_NOVEMBER },
309 { "December", TM_DECEMBER },
310 { NULL, 0 }
311 };
312
313 static struct lookup const wday_names[] = {
314 { "Sunday", TM_SUNDAY },
315 { "Monday", TM_MONDAY },
316 { "Tuesday", TM_TUESDAY },
317 { "Wednesday", TM_WEDNESDAY },
318 { "Thursday", TM_THURSDAY },
319 { "Friday", TM_FRIDAY },
320 { "Saturday", TM_SATURDAY },
321 { NULL, 0 }
322 };
323
324 static struct lookup const lasts[] = {
325 { "last-Sunday", TM_SUNDAY },
326 { "last-Monday", TM_MONDAY },
327 { "last-Tuesday", TM_TUESDAY },
328 { "last-Wednesday", TM_WEDNESDAY },
329 { "last-Thursday", TM_THURSDAY },
330 { "last-Friday", TM_FRIDAY },
331 { "last-Saturday", TM_SATURDAY },
332 { NULL, 0 }
333 };
334
335 static struct lookup const begin_years[] = {
336 { "minimum", YR_MINIMUM },
337 { "maximum", YR_MAXIMUM },
338 { NULL, 0 }
339 };
340
341 static struct lookup const end_years[] = {
342 { "minimum", YR_MINIMUM },
343 { "maximum", YR_MAXIMUM },
344 { "only", YR_ONLY },
345 { NULL, 0 }
346 };
347
348 static struct lookup const leap_types[] = {
349 { "Rolling", TRUE },
350 { "Stationary", FALSE },
351 { NULL, 0 }
352 };
353
354 static const int len_months[2][MONSPERYEAR] = {
355 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
356 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
357 };
358
359 static const int len_years[2] = {
360 DAYSPERNYEAR, DAYSPERLYEAR
361 };
362
363 static struct attype {
364 zic_t at;
365 unsigned char type;
366 } attypes[TZ_MAX_TIMES];
367 static long gmtoffs[TZ_MAX_TYPES];
368 static char isdsts[TZ_MAX_TYPES];
369 static unsigned char abbrinds[TZ_MAX_TYPES];
370 static char ttisstds[TZ_MAX_TYPES];
371 static char ttisgmts[TZ_MAX_TYPES];
372 static char chars[TZ_MAX_CHARS];
373 static zic_t trans[TZ_MAX_LEAPS];
374 static long corr[TZ_MAX_LEAPS];
375 static char roll[TZ_MAX_LEAPS];
376
377 /*
378 ** Memory allocation.
379 */
380
381 static char *
382 memcheck(ptr)
383 char * const ptr;
384 {
385 if (ptr == NULL) {
386 const char *e = strerror(errno);
387
388 (void) fprintf(stderr, _("%s: Memory exhausted: %s\n"),
389 progname, e);
390 exit(EXIT_FAILURE);
391 }
392 return ptr;
393 }
394
395 #define emalloc(size) memcheck(imalloc(size))
396 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
397 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
398 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
399
400 /*
401 ** Error handling.
402 */
403
404 static void
405 eats(name, num, rname, rnum)
406 const char * const name;
407 const int num;
408 const char * const rname;
409 const int rnum;
410 {
411 filename = name;
412 linenum = num;
413 rfilename = rname;
414 rlinenum = rnum;
415 }
416
417 static void
418 eat(name, num)
419 const char * const name;
420 const int num;
421 {
422 eats(name, num, (char *) NULL, -1);
423 }
424
425 static void
426 error(string)
427 const char * const string;
428 {
429 /*
430 ** Match the format of "cc" to allow sh users to
431 ** zic ... 2>&1 | error -t "*" -v
432 ** on BSD systems.
433 */
434 (void) fprintf(stderr, _("\"%s\", line %d: %s"),
435 filename, linenum, string);
436 if (rfilename != NULL)
437 (void) fprintf(stderr, _(" (rule from \"%s\", line %d)"),
438 rfilename, rlinenum);
439 (void) fprintf(stderr, "\n");
440 ++errors;
441 }
442
443 static void
444 warning(string)
445 const char * const string;
446 {
447 char * cp;
448
449 cp = ecpyalloc(_("warning: "));
450 cp = ecatalloc(cp, string);
451 error(cp);
452 ifree(cp);
453 --errors;
454 }
455
456 static void
457 usage(FILE *stream, int status)
458 {
459 (void) fprintf(stream, _("%s: usage is %s \
460 [ --version ] [ --help ] [ -v ] [ -l localtime ] [ -p posixrules ] \\\n\
461 \t[ -d directory ] [ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n\
462 \n\
463 Report bugs to tz@elsie.nci.nih.gov.\n"),
464 progname, progname);
465 exit(status);
466 }
467
468 static const char * psxrules;
469 static const char * lcltime;
470 static const char * directory;
471 static const char * leapsec;
472 static const char * yitcommand;
473
474 int
475 main(argc, argv)
476 int argc;
477 char * argv[];
478 {
479 register int i;
480 register int j;
481 register int c;
482
483 #ifdef unix
484 (void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
485 #endif /* defined unix */
486 #if HAVE_GETTEXT
487 (void) setlocale(LC_ALL, "");
488 #ifdef TZ_DOMAINDIR
489 (void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
490 #endif /* defined TEXTDOMAINDIR */
491 (void) textdomain(TZ_DOMAIN);
492 #endif /* HAVE_GETTEXT */
493 progname = argv[0];
494 if (TYPE_BIT(zic_t) < 64) {
495 (void) fprintf(stderr, "%s: %s\n", progname,
496 _("wild compilation-time specification of zic_t"));
497 exit(EXIT_FAILURE);
498 }
499 for (i = 1; i < argc; ++i)
500 if (strcmp(argv[i], "--version") == 0) {
501 (void) printf("%s\n", elsieid);
502 exit(EXIT_SUCCESS);
503 } else if (strcmp(argv[i], "--help") == 0) {
504 usage(stdout, EXIT_SUCCESS);
505 }
506 while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF && c != -1)
507 switch (c) {
508 default:
509 usage(stderr, EXIT_FAILURE);
510 case 'd':
511 if (directory == NULL)
512 directory = optarg;
513 else {
514 (void) fprintf(stderr,
515 _("%s: More than one -d option specified\n"),
516 progname);
517 exit(EXIT_FAILURE);
518 }
519 break;
520 case 'l':
521 if (lcltime == NULL)
522 lcltime = optarg;
523 else {
524 (void) fprintf(stderr,
525 _("%s: More than one -l option specified\n"),
526 progname);
527 exit(EXIT_FAILURE);
528 }
529 break;
530 case 'p':
531 if (psxrules == NULL)
532 psxrules = optarg;
533 else {
534 (void) fprintf(stderr,
535 _("%s: More than one -p option specified\n"),
536 progname);
537 exit(EXIT_FAILURE);
538 }
539 break;
540 case 'y':
541 if (yitcommand == NULL)
542 yitcommand = optarg;
543 else {
544 (void) fprintf(stderr,
545 _("%s: More than one -y option specified\n"),
546 progname);
547 exit(EXIT_FAILURE);
548 }
549 break;
550 case 'L':
551 if (leapsec == NULL)
552 leapsec = optarg;
553 else {
554 (void) fprintf(stderr,
555 _("%s: More than one -L option specified\n"),
556 progname);
557 exit(EXIT_FAILURE);
558 }
559 break;
560 case 'v':
561 noise = TRUE;
562 break;
563 case 's':
564 (void) printf("%s: -s ignored\n", progname);
565 break;
566 }
567 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
568 usage(stderr, EXIT_FAILURE); /* usage message by request */
569 if (directory == NULL)
570 directory = TZDIR;
571 if (yitcommand == NULL)
572 yitcommand = "yearistype";
573
574 setboundaries();
575
576 if (optind < argc && leapsec != NULL) {
577 infile(leapsec);
578 adjleap();
579 }
580
581 for (i = optind; i < argc; ++i)
582 infile(argv[i]);
583 if (errors)
584 exit(EXIT_FAILURE);
585 associate();
586 for (i = 0; i < nzones; i = j) {
587 /*
588 ** Find the next non-continuation zone entry.
589 */
590 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
591 continue;
592 outzone(&zones[i], j - i);
593 }
594 /*
595 ** Make links.
596 */
597 for (i = 0; i < nlinks; ++i) {
598 eat(links[i].l_filename, links[i].l_linenum);
599 dolink(links[i].l_from, links[i].l_to);
600 if (noise)
601 for (j = 0; j < nlinks; ++j)
602 if (strcmp(links[i].l_to,
603 links[j].l_from) == 0)
604 warning(_("link to link"));
605 }
606 if (lcltime != NULL) {
607 eat("command line", 1);
608 dolink(lcltime, TZDEFAULT);
609 }
610 if (psxrules != NULL) {
611 eat("command line", 1);
612 dolink(psxrules, TZDEFRULES);
613 }
614 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
615 }
616
617 static void
618 dolink(fromfield, tofield)
619 const char * const fromfield;
620 const char * const tofield;
621 {
622 register char * fromname;
623 register char * toname;
624
625 if (fromfield[0] == '/')
626 fromname = ecpyalloc(fromfield);
627 else {
628 fromname = ecpyalloc(directory);
629 fromname = ecatalloc(fromname, "/");
630 fromname = ecatalloc(fromname, fromfield);
631 }
632 if (tofield[0] == '/')
633 toname = ecpyalloc(tofield);
634 else {
635 toname = ecpyalloc(directory);
636 toname = ecatalloc(toname, "/");
637 toname = ecatalloc(toname, tofield);
638 }
639 /*
640 ** We get to be careful here since
641 ** there's a fair chance of root running us.
642 */
643 if (!itsdir(toname))
644 (void) remove(toname);
645 if (link(fromname, toname) != 0) {
646 int result;
647
648 if (mkdirs(toname) != 0)
649 exit(EXIT_FAILURE);
650
651 result = link(fromname, toname);
652 #if HAVE_SYMLINK
653 if (result != 0 &&
654 access(fromname, F_OK) == 0 &&
655 !itsdir(fromname)) {
656 const char *s = tofield;
657 register char * symlinkcontents = NULL;
658
659 while ((s = strchr(s+1, '/')) != NULL)
660 symlinkcontents =
661 ecatalloc(symlinkcontents,
662 "../");
663 symlinkcontents =
664 ecatalloc(symlinkcontents,
665 fromname);
666 result = symlink(symlinkcontents,
667 toname);
668 if (result == 0)
669 warning(_("hard link failed, symbolic link used"));
670 ifree(symlinkcontents);
671 }
672 #endif /* HAVE_SYMLINK */
673 if (result != 0) {
674 const char *e = strerror(errno);
675
676 (void) fprintf(stderr,
677 _("%s: Can't link from %s to %s: %s\n"),
678 progname, fromname, toname, e);
679 exit(EXIT_FAILURE);
680 }
681 }
682 ifree(fromname);
683 ifree(toname);
684 }
685
686 #define TIME_T_BITS_IN_FILE 64
687
688 static void
689 setboundaries(void)
690 {
691 register int i;
692
693 min_time = -1;
694 for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i)
695 min_time *= 2;
696 max_time = -(min_time + 1);
697 }
698
699 static int
700 itsdir(name)
701 const char * const name;
702 {
703 register char * myname;
704 register int accres;
705
706 myname = ecpyalloc(name);
707 myname = ecatalloc(myname, "/.");
708 accres = access(myname, F_OK);
709 ifree(myname);
710 return accres == 0;
711 }
712
713 /*
714 ** Associate sets of rules with zones.
715 */
716
717 /*
718 ** Sort by rule name.
719 */
720
721 static int
722 rcomp(cp1, cp2)
723 const void * cp1;
724 const void * cp2;
725 {
726 return strcmp(((const struct rule *) cp1)->r_name,
727 ((const struct rule *) cp2)->r_name);
728 }
729
730 static void
731 associate(void)
732 {
733 register struct zone * zp;
734 register struct rule * rp;
735 register int base, out;
736 register int i, j;
737
738 if (nrules != 0) {
739 (void) qsort((void *) rules, (size_t) nrules,
740 (size_t) sizeof *rules, rcomp);
741 for (i = 0; i < nrules - 1; ++i) {
742 if (strcmp(rules[i].r_name,
743 rules[i + 1].r_name) != 0)
744 continue;
745 if (strcmp(rules[i].r_filename,
746 rules[i + 1].r_filename) == 0)
747 continue;
748 eat(rules[i].r_filename, rules[i].r_linenum);
749 warning(_("same rule name in multiple files"));
750 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
751 warning(_("same rule name in multiple files"));
752 for (j = i + 2; j < nrules; ++j) {
753 if (strcmp(rules[i].r_name,
754 rules[j].r_name) != 0)
755 break;
756 if (strcmp(rules[i].r_filename,
757 rules[j].r_filename) == 0)
758 continue;
759 if (strcmp(rules[i + 1].r_filename,
760 rules[j].r_filename) == 0)
761 continue;
762 break;
763 }
764 i = j - 1;
765 }
766 }
767 for (i = 0; i < nzones; ++i) {
768 zp = &zones[i];
769 zp->z_rules = NULL;
770 zp->z_nrules = 0;
771 }
772 for (base = 0; base < nrules; base = out) {
773 rp = &rules[base];
774 for (out = base + 1; out < nrules; ++out)
775 if (strcmp(rp->r_name, rules[out].r_name) != 0)
776 break;
777 for (i = 0; i < nzones; ++i) {
778 zp = &zones[i];
779 if (strcmp(zp->z_rule, rp->r_name) != 0)
780 continue;
781 zp->z_rules = rp;
782 zp->z_nrules = out - base;
783 }
784 }
785 for (i = 0; i < nzones; ++i) {
786 zp = &zones[i];
787 if (zp->z_nrules == 0) {
788 /*
789 ** Maybe we have a local standard time offset.
790 */
791 eat(zp->z_filename, zp->z_linenum);
792 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
793 TRUE);
794 /*
795 ** Note, though, that if there's no rule,
796 ** a '%s' in the format is a bad thing.
797 */
798 if (strchr(zp->z_format, '%') != 0)
799 error(_("%s in ruleless zone"));
800 }
801 }
802 if (errors)
803 exit(EXIT_FAILURE);
804 }
805
806 static void
807 infile(name)
808 const char * name;
809 {
810 register FILE * fp;
811 register char ** fields;
812 register char * cp;
813 register const struct lookup * lp;
814 register int nfields;
815 register int wantcont;
816 register int num;
817 char buf[BUFSIZ];
818
819 if (strcmp(name, "-") == 0) {
820 name = _("standard input");
821 fp = stdin;
822 } else if ((fp = fopen(name, "r")) == NULL) {
823 const char *e = strerror(errno);
824
825 (void) fprintf(stderr, _("%s: Can't open %s: %s\n"),
826 progname, name, e);
827 exit(EXIT_FAILURE);
828 }
829 wantcont = FALSE;
830 for (num = 1; ; ++num) {
831 eat(name, num);
832 if (fgets(buf, (int) sizeof buf, fp) != buf)
833 break;
834 cp = strchr(buf, '\n');
835 if (cp == NULL) {
836 error(_("line too long"));
837 exit(EXIT_FAILURE);
838 }
839 *cp = '\0';
840 fields = getfields(buf);
841 nfields = 0;
842 while (fields[nfields] != NULL) {
843 static char nada;
844
845 if (strcmp(fields[nfields], "-") == 0)
846 fields[nfields] = &nada;
847 ++nfields;
848 }
849 if (nfields == 0) {
850 /* nothing to do */
851 } else if (wantcont) {
852 wantcont = inzcont(fields, nfields);
853 } else {
854 lp = byword(fields[0], line_codes);
855 if (lp == NULL)
856 error(_("input line of unknown type"));
857 else switch ((int) (lp->l_value)) {
858 case LC_RULE:
859 inrule(fields, nfields);
860 wantcont = FALSE;
861 break;
862 case LC_ZONE:
863 wantcont = inzone(fields, nfields);
864 break;
865 case LC_LINK:
866 inlink(fields, nfields);
867 wantcont = FALSE;
868 break;
869 case LC_LEAP:
870 if (name != leapsec)
871 (void) fprintf(stderr,
872 _("%s: Leap line in non leap seconds file %s\n"),
873 progname, name);
874 else inleap(fields, nfields);
875 wantcont = FALSE;
876 break;
877 default: /* "cannot happen" */
878 (void) fprintf(stderr,
879 _("%s: panic: Invalid l_value %d\n"),
880 progname, lp->l_value);
881 exit(EXIT_FAILURE);
882 }
883 }
884 ifree((char *) fields);
885 }
886 if (ferror(fp)) {
887 (void) fprintf(stderr, _("%s: Error reading %s\n"),
888 progname, filename);
889 exit(EXIT_FAILURE);
890 }
891 if (fp != stdin && fclose(fp)) {
892 const char *e = strerror(errno);
893
894 (void) fprintf(stderr, _("%s: Error closing %s: %s\n"),
895 progname, filename, e);
896 exit(EXIT_FAILURE);
897 }
898 if (wantcont)
899 error(_("expected continuation line not found"));
900 }
901
902 /*
903 ** Convert a string of one of the forms
904 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
905 ** into a number of seconds.
906 ** A null string maps to zero.
907 ** Call error with errstring and return zero on errors.
908 */
909
910 static long
911 gethms(string, errstring, signable)
912 const char * string;
913 const char * const errstring;
914 const int signable;
915 {
916 long hh;
917 int mm, ss, sign;
918
919 if (string == NULL || *string == '\0')
920 return 0;
921 if (!signable)
922 sign = 1;
923 else if (*string == '-') {
924 sign = -1;
925 ++string;
926 } else sign = 1;
927 if (sscanf(string, scheck(string, "%ld"), &hh) == 1)
928 mm = ss = 0;
929 else if (sscanf(string, scheck(string, "%ld:%d"), &hh, &mm) == 2)
930 ss = 0;
931 else if (sscanf(string, scheck(string, "%ld:%d:%d"),
932 &hh, &mm, &ss) != 3) {
933 error(errstring);
934 return 0;
935 }
936 if (hh < 0 ||
937 mm < 0 || mm >= MINSPERHOUR ||
938 ss < 0 || ss > SECSPERMIN) {
939 error(errstring);
940 return 0;
941 }
942 if (LONG_MAX / SECSPERHOUR < hh) {
943 error(_("time overflow"));
944 return 0;
945 }
946 if (noise && hh == HOURSPERDAY && mm == 0 && ss == 0)
947 warning(_("24:00 not handled by pre-1998 versions of zic"));
948 if (noise && (hh > HOURSPERDAY ||
949 (hh == HOURSPERDAY && (mm != 0 || ss != 0))))
950 warning(_("values over 24 hours not handled by pre-2007 versions of zic"));
951 return oadd(eitol(sign) * hh * eitol(SECSPERHOUR),
952 eitol(sign) * (eitol(mm) * eitol(SECSPERMIN) + eitol(ss)));
953 }
954
955 static void
956 inrule(fields, nfields)
957 register char ** const fields;
958 const int nfields;
959 {
960 static struct rule r;
961
962 if (nfields != RULE_FIELDS) {
963 error(_("wrong number of fields on Rule line"));
964 return;
965 }
966 if (*fields[RF_NAME] == '\0') {
967 error(_("nameless rule"));
968 return;
969 }
970 r.r_filename = filename;
971 r.r_linenum = linenum;
972 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
973 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
974 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
975 r.r_name = ecpyalloc(fields[RF_NAME]);
976 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
977 if (max_abbrvar_len < strlen(r.r_abbrvar))
978 max_abbrvar_len = strlen(r.r_abbrvar);
979 rules = (struct rule *) (void *) erealloc((char *) rules,
980 (int) ((nrules + 1) * sizeof *rules));
981 rules[nrules++] = r;
982 }
983
984 static int
985 inzone(fields, nfields)
986 register char ** const fields;
987 const int nfields;
988 {
989 register int i;
990 static char * buf;
991
992 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
993 error(_("wrong number of fields on Zone line"));
994 return FALSE;
995 }
996 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
997 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
998 (void) sprintf(buf,
999 _("\"Zone %s\" line and -l option are mutually exclusive"),
1000 TZDEFAULT);
1001 error(buf);
1002 return FALSE;
1003 }
1004 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
1005 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
1006 (void) sprintf(buf,
1007 _("\"Zone %s\" line and -p option are mutually exclusive"),
1008 TZDEFRULES);
1009 error(buf);
1010 return FALSE;
1011 }
1012 for (i = 0; i < nzones; ++i)
1013 if (zones[i].z_name != NULL &&
1014 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
1015 buf = erealloc(buf, (int) (132 +
1016 strlen(fields[ZF_NAME]) +
1017 strlen(zones[i].z_filename)));
1018 (void) sprintf(buf,
1019 _("duplicate zone name %s (file \"%s\", line %d)"),
1020 fields[ZF_NAME],
1021 zones[i].z_filename,
1022 zones[i].z_linenum);
1023 error(buf);
1024 return FALSE;
1025 }
1026 return inzsub(fields, nfields, FALSE);
1027 }
1028
1029 static int
1030 inzcont(fields, nfields)
1031 register char ** const fields;
1032 const int nfields;
1033 {
1034 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
1035 error(_("wrong number of fields on Zone continuation line"));
1036 return FALSE;
1037 }
1038 return inzsub(fields, nfields, TRUE);
1039 }
1040
1041 static int
1042 inzsub(fields, nfields, iscont)
1043 register char ** const fields;
1044 const int nfields;
1045 const int iscont;
1046 {
1047 register char * cp;
1048 static struct zone z;
1049 register int i_gmtoff, i_rule, i_format;
1050 register int i_untilyear, i_untilmonth;
1051 register int i_untilday, i_untiltime;
1052 register int hasuntil;
1053
1054 if (iscont) {
1055 i_gmtoff = ZFC_GMTOFF;
1056 i_rule = ZFC_RULE;
1057 i_format = ZFC_FORMAT;
1058 i_untilyear = ZFC_TILYEAR;
1059 i_untilmonth = ZFC_TILMONTH;
1060 i_untilday = ZFC_TILDAY;
1061 i_untiltime = ZFC_TILTIME;
1062 z.z_name = NULL;
1063 } else {
1064 i_gmtoff = ZF_GMTOFF;
1065 i_rule = ZF_RULE;
1066 i_format = ZF_FORMAT;
1067 i_untilyear = ZF_TILYEAR;
1068 i_untilmonth = ZF_TILMONTH;
1069 i_untilday = ZF_TILDAY;
1070 i_untiltime = ZF_TILTIME;
1071 z.z_name = ecpyalloc(fields[ZF_NAME]);
1072 }
1073 z.z_filename = filename;
1074 z.z_linenum = linenum;
1075 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UTC offset"), TRUE);
1076 if ((cp = strchr(fields[i_format], '%')) != 0) {
1077 if (*++cp != 's' || strchr(cp, '%') != 0) {
1078 error(_("invalid abbreviation format"));
1079 return FALSE;
1080 }
1081 }
1082 z.z_rule = ecpyalloc(fields[i_rule]);
1083 z.z_format = ecpyalloc(fields[i_format]);
1084 if (max_format_len < strlen(z.z_format))
1085 max_format_len = strlen(z.z_format);
1086 hasuntil = nfields > i_untilyear;
1087 if (hasuntil) {
1088 z.z_untilrule.r_filename = filename;
1089 z.z_untilrule.r_linenum = linenum;
1090 rulesub(&z.z_untilrule,
1091 fields[i_untilyear],
1092 "only",
1093 "",
1094 (nfields > i_untilmonth) ?
1095 fields[i_untilmonth] : "Jan",
1096 (nfields > i_untilday) ? fields[i_untilday] : "1",
1097 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1098 z.z_untiltime = rpytime(&z.z_untilrule,
1099 z.z_untilrule.r_loyear);
1100 if (iscont && nzones > 0 &&
1101 z.z_untiltime > min_time &&
1102 z.z_untiltime < max_time &&
1103 zones[nzones - 1].z_untiltime > min_time &&
1104 zones[nzones - 1].z_untiltime < max_time &&
1105 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1106 error(_(
1107 "Zone continuation line end time is not after end time of previous line"
1108 ));
1109 return FALSE;
1110 }
1111 }
1112 zones = (struct zone *) (void *) erealloc((char *) zones,
1113 (int) ((nzones + 1) * sizeof *zones));
1114 zones[nzones++] = z;
1115 /*
1116 ** If there was an UNTIL field on this line,
1117 ** there's more information about the zone on the next line.
1118 */
1119 return hasuntil;
1120 }
1121
1122 static void
1123 inleap(fields, nfields)
1124 register char ** const fields;
1125 const int nfields;
1126 {
1127 register const char * cp;
1128 register const struct lookup * lp;
1129 register int i, j;
1130 int year, month, day;
1131 long dayoff, tod;
1132 zic_t t;
1133
1134 if (nfields != LEAP_FIELDS) {
1135 error(_("wrong number of fields on Leap line"));
1136 return;
1137 }
1138 dayoff = 0;
1139 cp = fields[LP_YEAR];
1140 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1141 /*
1142 ** Leapin' Lizards!
1143 */
1144 error(_("invalid leaping year"));
1145 return;
1146 }
1147 if (!leapseen || leapmaxyear < year)
1148 leapmaxyear = year;
1149 if (!leapseen || leapminyear > year)
1150 leapminyear = year;
1151 leapseen = TRUE;
1152 j = EPOCH_YEAR;
1153 while (j != year) {
1154 if (year > j) {
1155 i = len_years[isleap(j)];
1156 ++j;
1157 } else {
1158 --j;
1159 i = -len_years[isleap(j)];
1160 }
1161 dayoff = oadd(dayoff, eitol(i));
1162 }
1163 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1164 error(_("invalid month name"));
1165 return;
1166 }
1167 month = lp->l_value;
1168 j = TM_JANUARY;
1169 while (j != month) {
1170 i = len_months[isleap(year)][j];
1171 dayoff = oadd(dayoff, eitol(i));
1172 ++j;
1173 }
1174 cp = fields[LP_DAY];
1175 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1176 day <= 0 || day > len_months[isleap(year)][month]) {
1177 error(_("invalid day of month"));
1178 return;
1179 }
1180 dayoff = oadd(dayoff, eitol(day - 1));
1181 if (dayoff < 0 && !TYPE_SIGNED(zic_t)) {
1182 error(_("time before zero"));
1183 return;
1184 }
1185 if (dayoff < min_time / SECSPERDAY) {
1186 error(_("time too small"));
1187 return;
1188 }
1189 if (dayoff > max_time / SECSPERDAY) {
1190 error(_("time too large"));
1191 return;
1192 }
1193 t = (zic_t) dayoff * SECSPERDAY;
1194 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1195 cp = fields[LP_CORR];
1196 {
1197 register int positive;
1198 int count;
1199
1200 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1201 positive = FALSE;
1202 count = 1;
1203 } else if (strcmp(cp, "--") == 0) {
1204 positive = FALSE;
1205 count = 2;
1206 } else if (strcmp(cp, "+") == 0) {
1207 positive = TRUE;
1208 count = 1;
1209 } else if (strcmp(cp, "++") == 0) {
1210 positive = TRUE;
1211 count = 2;
1212 } else {
1213 error(_("illegal CORRECTION field on Leap line"));
1214 return;
1215 }
1216 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1217 error(_(
1218 "illegal Rolling/Stationary field on Leap line"
1219 ));
1220 return;
1221 }
1222 leapadd(tadd(t, tod), positive, lp->l_value, count);
1223 }
1224 }
1225
1226 static void
1227 inlink(fields, nfields)
1228 register char ** const fields;
1229 const int nfields;
1230 {
1231 struct link l;
1232
1233 if (nfields != LINK_FIELDS) {
1234 error(_("wrong number of fields on Link line"));
1235 return;
1236 }
1237 if (*fields[LF_FROM] == '\0') {
1238 error(_("blank FROM field on Link line"));
1239 return;
1240 }
1241 if (*fields[LF_TO] == '\0') {
1242 error(_("blank TO field on Link line"));
1243 return;
1244 }
1245 l.l_filename = filename;
1246 l.l_linenum = linenum;
1247 l.l_from = ecpyalloc(fields[LF_FROM]);
1248 l.l_to = ecpyalloc(fields[LF_TO]);
1249 links = (struct link *) (void *) erealloc((char *) links,
1250 (int) ((nlinks + 1) * sizeof *links));
1251 links[nlinks++] = l;
1252 }
1253
1254 static void
1255 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1256 register struct rule * const rp;
1257 const char * const loyearp;
1258 const char * const hiyearp;
1259 const char * const typep;
1260 const char * const monthp;
1261 const char * const dayp;
1262 const char * const timep;
1263 {
1264 register const struct lookup * lp;
1265 register const char * cp;
1266 register char * dp;
1267 register char * ep;
1268
1269 if ((lp = byword(monthp, mon_names)) == NULL) {
1270 error(_("invalid month name"));
1271 return;
1272 }
1273 rp->r_month = lp->l_value;
1274 rp->r_todisstd = FALSE;
1275 rp->r_todisgmt = FALSE;
1276 dp = ecpyalloc(timep);
1277 if (*dp != '\0') {
1278 ep = dp + strlen(dp) - 1;
1279 switch (lowerit(*ep)) {
1280 case 's': /* Standard */
1281 rp->r_todisstd = TRUE;
1282 rp->r_todisgmt = FALSE;
1283 *ep = '\0';
1284 break;
1285 case 'w': /* Wall */
1286 rp->r_todisstd = FALSE;
1287 rp->r_todisgmt = FALSE;
1288 *ep = '\0';
1289 break;
1290 case 'g': /* Greenwich */
1291 case 'u': /* Universal */
1292 case 'z': /* Zulu */
1293 rp->r_todisstd = TRUE;
1294 rp->r_todisgmt = TRUE;
1295 *ep = '\0';
1296 break;
1297 }
1298 }
1299 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1300 ifree(dp);
1301 /*
1302 ** Year work.
1303 */
1304 cp = loyearp;
1305 lp = byword(cp, begin_years);
1306 rp->r_lowasnum = lp == NULL;
1307 if (!rp->r_lowasnum) switch ((int) lp->l_value) {
1308 case YR_MINIMUM:
1309 rp->r_loyear = INT_MIN;
1310 break;
1311 case YR_MAXIMUM:
1312 rp->r_loyear = INT_MAX;
1313 break;
1314 default: /* "cannot happen" */
1315 (void) fprintf(stderr,
1316 _("%s: panic: Invalid l_value %d\n"),
1317 progname, lp->l_value);
1318 exit(EXIT_FAILURE);
1319 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1320 error(_("invalid starting year"));
1321 return;
1322 }
1323 cp = hiyearp;
1324 lp = byword(cp, end_years);
1325 rp->r_hiwasnum = lp == NULL;
1326 if (!rp->r_hiwasnum) switch ((int) lp->l_value) {
1327 case YR_MINIMUM:
1328 rp->r_hiyear = INT_MIN;
1329 break;
1330 case YR_MAXIMUM:
1331 rp->r_hiyear = INT_MAX;
1332 break;
1333 case YR_ONLY:
1334 rp->r_hiyear = rp->r_loyear;
1335 break;
1336 default: /* "cannot happen" */
1337 (void) fprintf(stderr,
1338 _("%s: panic: Invalid l_value %d\n"),
1339 progname, lp->l_value);
1340 exit(EXIT_FAILURE);
1341 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1342 error(_("invalid ending year"));
1343 return;
1344 }
1345 if (rp->r_loyear > rp->r_hiyear) {
1346 error(_("starting year greater than ending year"));
1347 return;
1348 }
1349 if (*typep == '\0')
1350 rp->r_yrtype = NULL;
1351 else {
1352 if (rp->r_loyear == rp->r_hiyear) {
1353 error(_("typed single year"));
1354 return;
1355 }
1356 rp->r_yrtype = ecpyalloc(typep);
1357 }
1358 /*
1359 ** Day work.
1360 ** Accept things such as:
1361 ** 1
1362 ** last-Sunday
1363 ** Sun<=20
1364 ** Sun>=7
1365 */
1366 dp = ecpyalloc(dayp);
1367 if ((lp = byword(dp, lasts)) != NULL) {
1368 rp->r_dycode = DC_DOWLEQ;
1369 rp->r_wday = lp->l_value;
1370 rp->r_dayofmonth = len_months[1][rp->r_month];
1371 } else {
1372 if ((ep = strchr(dp, '<')) != 0)
1373 rp->r_dycode = DC_DOWLEQ;
1374 else if ((ep = strchr(dp, '>')) != 0)
1375 rp->r_dycode = DC_DOWGEQ;
1376 else {
1377 ep = dp;
1378 rp->r_dycode = DC_DOM;
1379 }
1380 if (rp->r_dycode != DC_DOM) {
1381 *ep++ = 0;
1382 if (*ep++ != '=') {
1383 error(_("invalid day of month"));
1384 ifree(dp);
1385 return;
1386 }
1387 if ((lp = byword(dp, wday_names)) == NULL) {
1388 error(_("invalid weekday name"));
1389 ifree(dp);
1390 return;
1391 }
1392 rp->r_wday = lp->l_value;
1393 }
1394 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1395 rp->r_dayofmonth <= 0 ||
1396 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1397 error(_("invalid day of month"));
1398 ifree(dp);
1399 return;
1400 }
1401 }
1402 ifree(dp);
1403 }
1404
1405 static void
1406 convert(val, buf)
1407 const long val;
1408 char * const buf;
1409 {
1410 register int i;
1411 register int shift;
1412
1413 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1414 buf[i] = val >> shift;
1415 }
1416
1417 static void
1418 convert64(val, buf)
1419 const zic_t val;
1420 char * const buf;
1421 {
1422 register int i;
1423 register int shift;
1424
1425 for (i = 0, shift = 56; i < 8; ++i, shift -= 8)
1426 buf[i] = val >> shift;
1427 }
1428
1429 static void
1430 puttzcode(val, fp)
1431 const long val;
1432 FILE * const fp;
1433 {
1434 char buf[4];
1435
1436 convert(val, buf);
1437 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1438 }
1439
1440 static void
1441 puttzcode64(val, fp)
1442 const zic_t val;
1443 FILE * const fp;
1444 {
1445 char buf[8];
1446
1447 convert64(val, buf);
1448 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1449 }
1450
1451 static int
1452 atcomp(avp, bvp)
1453 const void * avp;
1454 const void * bvp;
1455 {
1456 const zic_t a = ((const struct attype *) avp)->at;
1457 const zic_t b = ((const struct attype *) bvp)->at;
1458
1459 return (a < b) ? -1 : (a > b);
1460 }
1461
1462 static int
1463 is32(x)
1464 const zic_t x;
1465 {
1466 return INT32_MIN <= x && x <= INT32_MAX;
1467 }
1468
1469 static void
1470 writezone(name, string)
1471 const char * const name;
1472 const char * const string;
1473 {
1474 register FILE * fp;
1475 register int i, j;
1476 register int leapcnt32, leapi32;
1477 register int timecnt32, timei32;
1478 register int pass;
1479 static char * fullname;
1480 static const struct tzhead tzh0;
1481 static struct tzhead tzh;
1482 zic_t ats[TZ_MAX_TIMES];
1483 unsigned char types[TZ_MAX_TIMES];
1484
1485 /*
1486 ** Sort.
1487 */
1488 if (timecnt > 1)
1489 (void) qsort((void *) attypes, (size_t) timecnt,
1490 (size_t) sizeof *attypes, atcomp);
1491 /*
1492 ** Optimize.
1493 */
1494 {
1495 int fromi;
1496 int toi;
1497
1498 toi = 0;
1499 fromi = 0;
1500 while (fromi < timecnt && attypes[fromi].at < min_time)
1501 ++fromi;
1502 if (isdsts[0] == 0)
1503 while (fromi < timecnt && attypes[fromi].type == 0)
1504 ++fromi; /* handled by default rule */
1505 for ( ; fromi < timecnt; ++fromi) {
1506 if (toi != 0 && ((attypes[fromi].at +
1507 gmtoffs[attypes[toi - 1].type]) <=
1508 (attypes[toi - 1].at + gmtoffs[toi == 1 ? 0
1509 : attypes[toi - 2].type]))) {
1510 attypes[toi - 1].type =
1511 attypes[fromi].type;
1512 continue;
1513 }
1514 if (toi == 0 ||
1515 attypes[toi - 1].type != attypes[fromi].type)
1516 attypes[toi++] = attypes[fromi];
1517 }
1518 timecnt = toi;
1519 }
1520 /*
1521 ** Transfer.
1522 */
1523 for (i = 0; i < timecnt; ++i) {
1524 ats[i] = attypes[i].at;
1525 types[i] = attypes[i].type;
1526 }
1527 /*
1528 ** Correct for leap seconds.
1529 */
1530 for (i = 0; i < timecnt; ++i) {
1531 j = leapcnt;
1532 while (--j >= 0)
1533 if (ats[i] > trans[j] - corr[j]) {
1534 ats[i] = tadd(ats[i], corr[j]);
1535 break;
1536 }
1537 }
1538 /*
1539 ** Figure out 32-bit-limited starts and counts.
1540 */
1541 timecnt32 = timecnt;
1542 timei32 = 0;
1543 leapcnt32 = leapcnt;
1544 leapi32 = 0;
1545 while (timecnt32 > 0 && !is32(ats[timecnt32 - 1]))
1546 --timecnt32;
1547 while (timecnt32 > 0 && !is32(ats[timei32])) {
1548 --timecnt32;
1549 ++timei32;
1550 }
1551 while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1]))
1552 --leapcnt32;
1553 while (leapcnt32 > 0 && !is32(trans[leapi32])) {
1554 --leapcnt32;
1555 ++leapi32;
1556 }
1557 fullname = erealloc(fullname,
1558 (int) (strlen(directory) + 1 + strlen(name) + 1));
1559 (void) sprintf(fullname, "%s/%s", directory, name);
1560 /*
1561 ** Remove old file, if any, to snap links.
1562 */
1563 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) {
1564 const char *e = strerror(errno);
1565
1566 (void) fprintf(stderr, _("%s: Can't remove %s: %s\n"),
1567 progname, fullname, e);
1568 exit(EXIT_FAILURE);
1569 }
1570 if ((fp = fopen(fullname, "wb")) == NULL) {
1571 if (mkdirs(fullname) != 0)
1572 exit(EXIT_FAILURE);
1573 if ((fp = fopen(fullname, "wb")) == NULL) {
1574 const char *e = strerror(errno);
1575
1576 (void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
1577 progname, fullname, e);
1578 exit(EXIT_FAILURE);
1579 }
1580 }
1581 for (pass = 1; pass <= 2; ++pass) {
1582 register int thistimei, thistimecnt;
1583 register int thisleapi, thisleapcnt;
1584 register int thistimelim, thisleaplim;
1585 int writetype[TZ_MAX_TIMES];
1586 int typemap[TZ_MAX_TYPES];
1587 register int thistypecnt;
1588 char thischars[TZ_MAX_CHARS];
1589 char thischarcnt;
1590 int indmap[TZ_MAX_CHARS];
1591
1592 if (pass == 1) {
1593 thistimei = timei32;
1594 thistimecnt = timecnt32;
1595 thisleapi = leapi32;
1596 thisleapcnt = leapcnt32;
1597 } else {
1598 thistimei = 0;
1599 thistimecnt = timecnt;
1600 thisleapi = 0;
1601 thisleapcnt = leapcnt;
1602 }
1603 thistimelim = thistimei + thistimecnt;
1604 thisleaplim = thisleapi + thisleapcnt;
1605 for (i = 0; i < typecnt; ++i)
1606 writetype[i] = thistimecnt == timecnt;
1607 if (thistimecnt == 0) {
1608 /*
1609 ** No transition times fall in the current
1610 ** (32- or 64-bit) window.
1611 */
1612 if (typecnt != 0)
1613 writetype[typecnt - 1] = TRUE;
1614 } else {
1615 for (i = thistimei - 1; i < thistimelim; ++i)
1616 if (i >= 0)
1617 writetype[types[i]] = TRUE;
1618 /*
1619 ** For America/Godthab and Antarctica/Palmer
1620 */
1621 if (thistimei == 0)
1622 writetype[0] = TRUE;
1623 }
1624 thistypecnt = 0;
1625 for (i = 0; i < typecnt; ++i)
1626 typemap[i] = writetype[i] ? thistypecnt++ : -1;
1627 for (i = 0; i < sizeof indmap / sizeof indmap[0]; ++i)
1628 indmap[i] = -1;
1629 thischarcnt = 0;
1630 for (i = 0; i < typecnt; ++i) {
1631 register char * thisabbr;
1632
1633 if (!writetype[i])
1634 continue;
1635 if (indmap[abbrinds[i]] >= 0)
1636 continue;
1637 thisabbr = &chars[abbrinds[i]];
1638 for (j = 0; j < thischarcnt; ++j)
1639 if (strcmp(&thischars[j], thisabbr) == 0)
1640 break;
1641 if (j == thischarcnt) {
1642 (void) strcpy(&thischars[(int) thischarcnt],
1643 thisabbr);
1644 thischarcnt += strlen(thisabbr) + 1;
1645 }
1646 indmap[abbrinds[i]] = j;
1647 }
1648 #define DO(field) (void) fwrite((void *) tzh.field, \
1649 (size_t) sizeof tzh.field, (size_t) 1, fp)
1650 tzh = tzh0;
1651 (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
1652 tzh.tzh_version[0] = ZIC_VERSION;
1653 convert(eitol(thistypecnt), tzh.tzh_ttisgmtcnt);
1654 convert(eitol(thistypecnt), tzh.tzh_ttisstdcnt);
1655 convert(eitol(thisleapcnt), tzh.tzh_leapcnt);
1656 convert(eitol(thistimecnt), tzh.tzh_timecnt);
1657 convert(eitol(thistypecnt), tzh.tzh_typecnt);
1658 convert(eitol(thischarcnt), tzh.tzh_charcnt);
1659 DO(tzh_magic);
1660 DO(tzh_version);
1661 DO(tzh_reserved);
1662 DO(tzh_ttisgmtcnt);
1663 DO(tzh_ttisstdcnt);
1664 DO(tzh_leapcnt);
1665 DO(tzh_timecnt);
1666 DO(tzh_typecnt);
1667 DO(tzh_charcnt);
1668 #undef DO
1669 for (i = thistimei; i < thistimelim; ++i)
1670 if (pass == 1)
1671 puttzcode((long) ats[i], fp);
1672 else puttzcode64(ats[i], fp);
1673 for (i = thistimei; i < thistimelim; ++i) {
1674 unsigned char uc;
1675
1676 uc = typemap[types[i]];
1677 (void) fwrite((void *) &uc,
1678 (size_t) sizeof uc,
1679 (size_t) 1,
1680 fp);
1681 }
1682 for (i = 0; i < typecnt; ++i)
1683 if (writetype[i]) {
1684 puttzcode(gmtoffs[i], fp);
1685 (void) putc(isdsts[i], fp);
1686 (void) putc((unsigned char) indmap[abbrinds[i]], fp);
1687 }
1688 if (thischarcnt != 0)
1689 (void) fwrite((void *) thischars,
1690 (size_t) sizeof thischars[0],
1691 (size_t) thischarcnt, fp);
1692 for (i = thisleapi; i < thisleaplim; ++i) {
1693 register zic_t todo;
1694
1695 if (roll[i]) {
1696 if (timecnt == 0 || trans[i] < ats[0]) {
1697 j = 0;
1698 while (isdsts[j])
1699 if (++j >= typecnt) {
1700 j = 0;
1701 break;
1702 }
1703 } else {
1704 j = 1;
1705 while (j < timecnt &&
1706 trans[i] >= ats[j])
1707 ++j;
1708 j = types[j - 1];
1709 }
1710 todo = tadd(trans[i], -gmtoffs[j]);
1711 } else todo = trans[i];
1712 if (pass == 1)
1713 puttzcode((long) todo, fp);
1714 else puttzcode64(todo, fp);
1715 puttzcode(corr[i], fp);
1716 }
1717 for (i = 0; i < typecnt; ++i)
1718 if (writetype[i])
1719 (void) putc(ttisstds[i], fp);
1720 for (i = 0; i < typecnt; ++i)
1721 if (writetype[i])
1722 (void) putc(ttisgmts[i], fp);
1723 }
1724 (void) fprintf(fp, "\n%s\n", string);
1725 if (ferror(fp) || fclose(fp)) {
1726 (void) fprintf(stderr, _("%s: Error writing %s\n"),
1727 progname, fullname);
1728 exit(EXIT_FAILURE);
1729 }
1730 }
1731
1732 static void
1733 doabbr(abbr, format, letters, isdst, doquotes)
1734 char * const abbr;
1735 const char * const format;
1736 const char * const letters;
1737 const int isdst;
1738 const int doquotes;
1739 {
1740 register char * cp;
1741 register char * slashp;
1742 register int len;
1743
1744 slashp = strchr(format, '/');
1745 if (slashp == NULL) {
1746 if (letters == NULL)
1747 (void) strcpy(abbr, format);
1748 else (void) sprintf(abbr, format, letters);
1749 } else if (isdst) {
1750 (void) strcpy(abbr, slashp + 1);
1751 } else {
1752 if (slashp > format)
1753 (void) strncpy(abbr, format,
1754 (unsigned) (slashp - format));
1755 abbr[slashp - format] = '\0';
1756 }
1757 if (!doquotes)
1758 return;
1759 for (cp = abbr; *cp != '\0'; ++cp)
1760 if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ", *cp) == NULL &&
1761 strchr("abcdefghijklmnopqrstuvwxyz", *cp) == NULL)
1762 break;
1763 len = strlen(abbr);
1764 if (len > 0 && *cp == '\0')
1765 return;
1766 abbr[len + 2] = '\0';
1767 abbr[len + 1] = '>';
1768 for ( ; len > 0; --len)
1769 abbr[len] = abbr[len - 1];
1770 abbr[0] = '<';
1771 }
1772
1773 static void
1774 updateminmax(x)
1775 const int x;
1776 {
1777 if (min_year > x)
1778 min_year = x;
1779 if (max_year < x)
1780 max_year = x;
1781 }
1782
1783 static int
1784 stringoffset(result, offset)
1785 char * result;
1786 long offset;
1787 {
1788 register int hours;
1789 register int minutes;
1790 register int seconds;
1791
1792 result[0] = '\0';
1793 if (offset < 0) {
1794 (void) strcpy(result, "-");
1795 offset = -offset;
1796 }
1797 seconds = offset % SECSPERMIN;
1798 offset /= SECSPERMIN;
1799 minutes = offset % MINSPERHOUR;
1800 offset /= MINSPERHOUR;
1801 hours = offset;
1802 if (hours >= HOURSPERDAY) {
1803 result[0] = '\0';
1804 return -1;
1805 }
1806 (void) sprintf(end(result), "%d", hours);
1807 if (minutes != 0 || seconds != 0) {
1808 (void) sprintf(end(result), ":%02d", minutes);
1809 if (seconds != 0)
1810 (void) sprintf(end(result), ":%02d", seconds);
1811 }
1812 return 0;
1813 }
1814
1815 static int
1816 stringrule(result, rp, dstoff, gmtoff)
1817 char * result;
1818 const struct rule * const rp;
1819 const long dstoff;
1820 const long gmtoff;
1821 {
1822 register long tod;
1823
1824 result = end(result);
1825 if (rp->r_dycode == DC_DOM) {
1826 register int month, total;
1827
1828 if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY)
1829 return -1;
1830 total = 0;
1831 for (month = 0; month < rp->r_month; ++month)
1832 total += len_months[0][month];
1833 (void) sprintf(result, "J%d", total + rp->r_dayofmonth);
1834 } else {
1835 register int week;
1836
1837 if (rp->r_dycode == DC_DOWGEQ) {
1838 week = 1 + rp->r_dayofmonth / DAYSPERWEEK;
1839 if ((week - 1) * DAYSPERWEEK + 1 != rp->r_dayofmonth)
1840 return -1;
1841 } else if (rp->r_dycode == DC_DOWLEQ) {
1842 if (rp->r_dayofmonth == len_months[1][rp->r_month])
1843 week = 5;
1844 else {
1845 week = 1 + rp->r_dayofmonth / DAYSPERWEEK;
1846 if (week * DAYSPERWEEK - 1 != rp->r_dayofmonth)
1847 return -1;
1848 }
1849 } else return -1; /* "cannot happen" */
1850 (void) sprintf(result, "M%d.%d.%d",
1851 rp->r_month + 1, week, rp->r_wday);
1852 }
1853 tod = rp->r_tod;
1854 if (rp->r_todisgmt)
1855 tod += gmtoff;
1856 if (rp->r_todisstd && rp->r_stdoff == 0)
1857 tod += dstoff;
1858 if (tod < 0) {
1859 result[0] = '\0';
1860 return -1;
1861 }
1862 if (tod != 2 * SECSPERMIN * MINSPERHOUR) {
1863 (void) strcat(result, "/");
1864 if (stringoffset(end(result), tod) != 0)
1865 return -1;
1866 }
1867 return 0;
1868 }
1869
1870 static void
1871 stringzone(result, zpfirst, zonecount)
1872 char * result;
1873 const struct zone * const zpfirst;
1874 const int zonecount;
1875 {
1876 register const struct zone * zp;
1877 register struct rule * rp;
1878 register struct rule * stdrp;
1879 register struct rule * dstrp;
1880 register int i;
1881 register const char * abbrvar;
1882
1883 result[0] = '\0';
1884 zp = zpfirst + zonecount - 1;
1885 stdrp = dstrp = NULL;
1886 for (i = 0; i < zp->z_nrules; ++i) {
1887 rp = &zp->z_rules[i];
1888 if (rp->r_hiwasnum || rp->r_hiyear != INT_MAX)
1889 continue;
1890 if (rp->r_yrtype != NULL)
1891 continue;
1892 if (rp->r_stdoff == 0) {
1893 if (stdrp == NULL)
1894 stdrp = rp;
1895 else return;
1896 } else {
1897 if (dstrp == NULL)
1898 dstrp = rp;
1899 else return;
1900 }
1901 }
1902 if (stdrp == NULL && dstrp == NULL) {
1903 /*
1904 ** There are no rules running through "max".
1905 ** Let's find the latest rule.
1906 */
1907 for (i = 0; i < zp->z_nrules; ++i) {
1908 rp = &zp->z_rules[i];
1909 if (stdrp == NULL || rp->r_hiyear > stdrp->r_hiyear ||
1910 (rp->r_hiyear == stdrp->r_hiyear &&
1911 rp->r_month > stdrp->r_month))
1912 stdrp = rp;
1913 }
1914 if (stdrp != NULL && stdrp->r_stdoff != 0)
1915 return; /* We end up in DST (a POSIX no-no). */
1916 /*
1917 ** Horrid special case: if year is 2037,
1918 ** presume this is a zone handled on a year-by-year basis;
1919 ** do not try to apply a rule to the zone.
1920 */
1921 if (stdrp != NULL && stdrp->r_hiyear == 2037)
1922 return;
1923 }
1924 if (stdrp == NULL && (zp->z_nrules != 0 || zp->z_stdoff != 0))
1925 return;
1926 abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar;
1927 doabbr(result, zp->z_format, abbrvar, FALSE, TRUE);
1928 if (stringoffset(end(result), -zp->z_gmtoff) != 0) {
1929 result[0] = '\0';
1930 return;
1931 }
1932 if (dstrp == NULL)
1933 return;
1934 doabbr(end(result), zp->z_format, dstrp->r_abbrvar, TRUE, TRUE);
1935 if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR)
1936 if (stringoffset(end(result),
1937 -(zp->z_gmtoff + dstrp->r_stdoff)) != 0) {
1938 result[0] = '\0';
1939 return;
1940 }
1941 (void) strcat(result, ",");
1942 if (stringrule(result, dstrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
1943 result[0] = '\0';
1944 return;
1945 }
1946 (void) strcat(result, ",");
1947 if (stringrule(result, stdrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
1948 result[0] = '\0';
1949 return;
1950 }
1951 }
1952
1953 static void
1954 outzone(zpfirst, zonecount)
1955 const struct zone * const zpfirst;
1956 const int zonecount;
1957 {
1958 register const struct zone * zp;
1959 register struct rule * rp;
1960 register int i, j;
1961 register int usestart, useuntil;
1962 register zic_t starttime, untiltime;
1963 register long gmtoff;
1964 register long stdoff;
1965 register int year;
1966 register long startoff;
1967 register int startttisstd;
1968 register int startttisgmt;
1969 register int type;
1970 register char * startbuf;
1971 register char * ab;
1972 register char * envvar;
1973 register int max_abbr_len;
1974 register int max_envvar_len;
1975
1976 max_abbr_len = 2 + max_format_len + max_abbrvar_len;
1977 max_envvar_len = 2 * max_abbr_len + 5 * 9;
1978 startbuf = emalloc(max_abbr_len + 1);
1979 ab = emalloc(max_abbr_len + 1);
1980 envvar = emalloc(max_envvar_len + 1);
1981 INITIALIZE(untiltime);
1982 INITIALIZE(starttime);
1983 /*
1984 ** Now. . .finally. . .generate some useful data!
1985 */
1986 timecnt = 0;
1987 typecnt = 0;
1988 charcnt = 0;
1989 /*
1990 ** Thanks to Earl Chew
1991 ** for noting the need to unconditionally initialize startttisstd.
1992 */
1993 startttisstd = FALSE;
1994 startttisgmt = FALSE;
1995 min_year = max_year = EPOCH_YEAR;
1996 if (leapseen) {
1997 updateminmax(leapminyear);
1998 updateminmax(leapmaxyear + (leapmaxyear < INT_MAX));
1999 }
2000 for (i = 0; i < zonecount; ++i) {
2001 zp = &zpfirst[i];
2002 if (i < zonecount - 1)
2003 updateminmax(zp->z_untilrule.r_loyear);
2004 for (j = 0; j < zp->z_nrules; ++j) {
2005 rp = &zp->z_rules[j];
2006 if (rp->r_lowasnum)
2007 updateminmax(rp->r_loyear);
2008 if (rp->r_hiwasnum)
2009 updateminmax(rp->r_hiyear);
2010 }
2011 }
2012 /*
2013 ** Generate lots of data if a rule can't cover all future times.
2014 */
2015 stringzone(envvar, zpfirst, zonecount);
2016 if (noise && envvar[0] == '\0') {
2017 register char * wp;
2018
2019 wp = ecpyalloc(_("no POSIX environment variable for zone"));
2020 wp = ecatalloc(wp, " ");
2021 wp = ecatalloc(wp, zpfirst->z_name);
2022 warning(wp);
2023 ifree(wp);
2024 }
2025 if (envvar[0] == '\0') {
2026 if (min_year >= INT_MIN + YEARSPERREPEAT)
2027 min_year -= YEARSPERREPEAT;
2028 else min_year = INT_MIN;
2029 if (max_year <= INT_MAX - YEARSPERREPEAT)
2030 max_year += YEARSPERREPEAT;
2031 else max_year = INT_MAX;
2032 }
2033 /*
2034 ** For the benefit of older systems,
2035 ** generate data from 1900 through 2037.
2036 */
2037 if (min_year > 1900)
2038 min_year = 1900;
2039 if (max_year < 2037)
2040 max_year = 2037;
2041 for (i = 0; i < zonecount; ++i) {
2042 /*
2043 ** A guess that may well be corrected later.
2044 */
2045 stdoff = 0;
2046 zp = &zpfirst[i];
2047 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
2048 useuntil = i < (zonecount - 1);
2049 if (useuntil && zp->z_untiltime <= min_time)
2050 continue;
2051 gmtoff = zp->z_gmtoff;
2052 eat(zp->z_filename, zp->z_linenum);
2053 *startbuf = '\0';
2054 startoff = zp->z_gmtoff;
2055 if (zp->z_nrules == 0) {
2056 stdoff = zp->z_stdoff;
2057 doabbr(startbuf, zp->z_format,
2058 (char *) NULL, stdoff != 0, FALSE);
2059 type = addtype(oadd(zp->z_gmtoff, stdoff),
2060 startbuf, stdoff != 0, startttisstd,
2061 startttisgmt);
2062 if (usestart) {
2063 addtt(starttime, type);
2064 usestart = FALSE;
2065 } else if (stdoff != 0)
2066 addtt(min_time, type);
2067 } else for (year = min_year; year <= max_year; ++year) {
2068 if (useuntil && year > zp->z_untilrule.r_hiyear)
2069 break;
2070 /*
2071 ** Mark which rules to do in the current year.
2072 ** For those to do, calculate rpytime(rp, year);
2073 */
2074 for (j = 0; j < zp->z_nrules; ++j) {
2075 rp = &zp->z_rules[j];
2076 eats(zp->z_filename, zp->z_linenum,
2077 rp->r_filename, rp->r_linenum);
2078 rp->r_todo = year >= rp->r_loyear &&
2079 year <= rp->r_hiyear &&
2080 yearistype(year, rp->r_yrtype);
2081 if (rp->r_todo)
2082 rp->r_temp = rpytime(rp, year);
2083 }
2084 for ( ; ; ) {
2085 register int k;
2086 register zic_t jtime, ktime;
2087 register long offset;
2088
2089 INITIALIZE(ktime);
2090 if (useuntil) {
2091 /*
2092 ** Turn untiltime into UTC
2093 ** assuming the current gmtoff and
2094 ** stdoff values.
2095 */
2096 untiltime = zp->z_untiltime;
2097 if (!zp->z_untilrule.r_todisgmt)
2098 untiltime = tadd(untiltime,
2099 -gmtoff);
2100 if (!zp->z_untilrule.r_todisstd)
2101 untiltime = tadd(untiltime,
2102 -stdoff);
2103 }
2104 /*
2105 ** Find the rule (of those to do, if any)
2106 ** that takes effect earliest in the year.
2107 */
2108 k = -1;
2109 for (j = 0; j < zp->z_nrules; ++j) {
2110 rp = &zp->z_rules[j];
2111 if (!rp->r_todo)
2112 continue;
2113 eats(zp->z_filename, zp->z_linenum,
2114 rp->r_filename, rp->r_linenum);
2115 offset = rp->r_todisgmt ? 0 : gmtoff;
2116 if (!rp->r_todisstd)
2117 offset = oadd(offset, stdoff);
2118 jtime = rp->r_temp;
2119 if (jtime == min_time ||
2120 jtime == max_time)
2121 continue;
2122 jtime = tadd(jtime, -offset);
2123 if (k < 0 || jtime < ktime) {
2124 k = j;
2125 ktime = jtime;
2126 }
2127 }
2128 if (k < 0)
2129 break; /* go on to next year */
2130 rp = &zp->z_rules[k];
2131 rp->r_todo = FALSE;
2132 if (useuntil && ktime >= untiltime)
2133 break;
2134 stdoff = rp->r_stdoff;
2135 if (usestart && ktime == starttime)
2136 usestart = FALSE;
2137 if (usestart) {
2138 if (ktime < starttime) {
2139 startoff = oadd(zp->z_gmtoff,
2140 stdoff);
2141 doabbr(startbuf, zp->z_format,
2142 rp->r_abbrvar,
2143 rp->r_stdoff != 0,
2144 FALSE);
2145 continue;
2146 }
2147 if (*startbuf == '\0' &&
2148 startoff == oadd(zp->z_gmtoff,
2149 stdoff)) {
2150 doabbr(startbuf,
2151 zp->z_format,
2152 rp->r_abbrvar,
2153 rp->r_stdoff !=
2154 0,
2155 FALSE);
2156 }
2157 }
2158 eats(zp->z_filename, zp->z_linenum,
2159 rp->r_filename, rp->r_linenum);
2160 doabbr(ab, zp->z_format, rp->r_abbrvar,
2161 rp->r_stdoff != 0, FALSE);
2162 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
2163 type = addtype(offset, ab, rp->r_stdoff != 0,
2164 rp->r_todisstd, rp->r_todisgmt);
2165 addtt(ktime, type);
2166 }
2167 }
2168 if (usestart) {
2169 if (*startbuf == '\0' &&
2170 zp->z_format != NULL &&
2171 strchr(zp->z_format, '%') == NULL &&
2172 strchr(zp->z_format, '/') == NULL)
2173 (void) strcpy(startbuf, zp->z_format);
2174 eat(zp->z_filename, zp->z_linenum);
2175 if (*startbuf == '\0')
2176 error(_("can't determine time zone abbreviation to use just after until time"));
2177 else addtt(starttime,
2178 addtype(startoff, startbuf,
2179 startoff != zp->z_gmtoff,
2180 startttisstd,
2181 startttisgmt));
2182 }
2183 /*
2184 ** Now we may get to set starttime for the next zone line.
2185 */
2186 if (useuntil) {
2187 startttisstd = zp->z_untilrule.r_todisstd;
2188 startttisgmt = zp->z_untilrule.r_todisgmt;
2189 starttime = zp->z_untiltime;
2190 if (!startttisstd)
2191 starttime = tadd(starttime, -stdoff);
2192 if (!startttisgmt)
2193 starttime = tadd(starttime, -gmtoff);
2194 }
2195 }
2196 writezone(zpfirst->z_name, envvar);
2197 ifree(startbuf);
2198 ifree(ab);
2199 ifree(envvar);
2200 }
2201
2202 static void
2203 addtt(starttime, type)
2204 const zic_t starttime;
2205 int type;
2206 {
2207 if (starttime <= min_time ||
2208 (timecnt == 1 && attypes[0].at < min_time)) {
2209 gmtoffs[0] = gmtoffs[type];
2210 isdsts[0] = isdsts[type];
2211 ttisstds[0] = ttisstds[type];
2212 ttisgmts[0] = ttisgmts[type];
2213 if (abbrinds[type] != 0)
2214 (void) strcpy(chars, &chars[abbrinds[type]]);
2215 abbrinds[0] = 0;
2216 charcnt = strlen(chars) + 1;
2217 typecnt = 1;
2218 timecnt = 0;
2219 type = 0;
2220 }
2221 if (timecnt >= TZ_MAX_TIMES) {
2222 error(_("too many transitions?!"));
2223 exit(EXIT_FAILURE);
2224 }
2225 attypes[timecnt].at = starttime;
2226 attypes[timecnt].type = type;
2227 ++timecnt;
2228 }
2229
2230 static int
2231 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
2232 const long gmtoff;
2233 const char * const abbr;
2234 const int isdst;
2235 const int ttisstd;
2236 const int ttisgmt;
2237 {
2238 register int i, j;
2239
2240 if (isdst != TRUE && isdst != FALSE) {
2241 error(_("internal error - addtype called with bad isdst"));
2242 exit(EXIT_FAILURE);
2243 }
2244 if (ttisstd != TRUE && ttisstd != FALSE) {
2245 error(_("internal error - addtype called with bad ttisstd"));
2246 exit(EXIT_FAILURE);
2247 }
2248 if (ttisgmt != TRUE && ttisgmt != FALSE) {
2249 error(_("internal error - addtype called with bad ttisgmt"));
2250 exit(EXIT_FAILURE);
2251 }
2252 /*
2253 ** See if there's already an entry for this zone type.
2254 ** If so, just return its index.
2255 */
2256 for (i = 0; i < typecnt; ++i) {
2257 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
2258 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
2259 ttisstd == ttisstds[i] &&
2260 ttisgmt == ttisgmts[i])
2261 return i;
2262 }
2263 /*
2264 ** There isn't one; add a new one, unless there are already too
2265 ** many.
2266 */
2267 if (typecnt >= TZ_MAX_TYPES) {
2268 error(_("too many local time types"));
2269 exit(EXIT_FAILURE);
2270 }
2271 if (! (-1L - 2147483647L <= gmtoff && gmtoff <= 2147483647L)) {
2272 error(_("UTC offset out of range"));
2273 exit(EXIT_FAILURE);
2274 }
2275 gmtoffs[i] = gmtoff;
2276 isdsts[i] = isdst;
2277 ttisstds[i] = ttisstd;
2278 ttisgmts[i] = ttisgmt;
2279
2280 for (j = 0; j < charcnt; ++j)
2281 if (strcmp(&chars[j], abbr) == 0)
2282 break;
2283 if (j == charcnt)
2284 newabbr(abbr);
2285 abbrinds[i] = j;
2286 ++typecnt;
2287 return i;
2288 }
2289
2290 static void
2291 leapadd(t, positive, rolling, count)
2292 const zic_t t;
2293 const int positive;
2294 const int rolling;
2295 int count;
2296 {
2297 register int i, j;
2298
2299 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
2300 error(_("too many leap seconds"));
2301 exit(EXIT_FAILURE);
2302 }
2303 for (i = 0; i < leapcnt; ++i)
2304 if (t <= trans[i]) {
2305 if (t == trans[i]) {
2306 error(_("repeated leap second moment"));
2307 exit(EXIT_FAILURE);
2308 }
2309 break;
2310 }
2311 do {
2312 for (j = leapcnt; j > i; --j) {
2313 trans[j] = trans[j - 1];
2314 corr[j] = corr[j - 1];
2315 roll[j] = roll[j - 1];
2316 }
2317 trans[i] = t;
2318 corr[i] = positive ? 1L : eitol(-count);
2319 roll[i] = rolling;
2320 ++leapcnt;
2321 } while (positive && --count != 0);
2322 }
2323
2324 static void
2325 adjleap(void)
2326 {
2327 register int i;
2328 register long last = 0;
2329
2330 /*
2331 ** propagate leap seconds forward
2332 */
2333 for (i = 0; i < leapcnt; ++i) {
2334 trans[i] = tadd(trans[i], last);
2335 last = corr[i] += last;
2336 }
2337 }
2338
2339 static int
2340 yearistype(year, type)
2341 const int year;
2342 const char * const type;
2343 {
2344 static char * buf;
2345 int result;
2346
2347 if (type == NULL || *type == '\0')
2348 return TRUE;
2349 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
2350 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
2351 result = system(buf);
2352 if (WIFEXITED(result)) switch (WEXITSTATUS(result)) {
2353 case 0:
2354 return TRUE;
2355 case 1:
2356 return FALSE;
2357 }
2358 error(_("Wild result from command execution"));
2359 (void) fprintf(stderr, _("%s: command was '%s', result was %d\n"),
2360 progname, buf, result);
2361 for ( ; ; )
2362 exit(EXIT_FAILURE);
2363 }
2364
2365 static int
2366 lowerit(a)
2367 int a;
2368 {
2369 a = (unsigned char) a;
2370 return (isascii(a) && isupper(a)) ? tolower(a) : a;
2371 }
2372
2373 static int
2374 ciequal(ap, bp) /* case-insensitive equality */
2375 register const char * ap;
2376 register const char * bp;
2377 {
2378 while (lowerit(*ap) == lowerit(*bp++))
2379 if (*ap++ == '\0')
2380 return TRUE;
2381 return FALSE;
2382 }
2383
2384 static int
2385 itsabbr(abbr, word)
2386 register const char * abbr;
2387 register const char * word;
2388 {
2389 if (lowerit(*abbr) != lowerit(*word))
2390 return FALSE;
2391 ++word;
2392 while (*++abbr != '\0')
2393 do {
2394 if (*word == '\0')
2395 return FALSE;
2396 } while (lowerit(*word++) != lowerit(*abbr));
2397 return TRUE;
2398 }
2399
2400 static const struct lookup *
2401 byword(word, table)
2402 register const char * const word;
2403 register const struct lookup * const table;
2404 {
2405 register const struct lookup * foundlp;
2406 register const struct lookup * lp;
2407
2408 if (word == NULL || table == NULL)
2409 return NULL;
2410 /*
2411 ** Look for exact match.
2412 */
2413 for (lp = table; lp->l_word != NULL; ++lp)
2414 if (ciequal(word, lp->l_word))
2415 return lp;
2416 /*
2417 ** Look for inexact match.
2418 */
2419 foundlp = NULL;
2420 for (lp = table; lp->l_word != NULL; ++lp)
2421 if (itsabbr(word, lp->l_word)) {
2422 if (foundlp == NULL)
2423 foundlp = lp;
2424 else return NULL; /* multiple inexact matches */
2425 }
2426 return foundlp;
2427 }
2428
2429 static char **
2430 getfields(cp)
2431 register char * cp;
2432 {
2433 register char * dp;
2434 register char ** array;
2435 register int nsubs;
2436
2437 if (cp == NULL)
2438 return NULL;
2439 array = (char **) (void *)
2440 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
2441 nsubs = 0;
2442 for ( ; ; ) {
2443 while (isascii((unsigned char) *cp) &&
2444 isspace((unsigned char) *cp))
2445 ++cp;
2446 if (*cp == '\0' || *cp == '#')
2447 break;
2448 array[nsubs++] = dp = cp;
2449 do {
2450 if ((*dp = *cp++) != '"')
2451 ++dp;
2452 else while ((*dp = *cp++) != '"')
2453 if (*dp != '\0')
2454 ++dp;
2455 else {
2456 error(_(
2457 "Odd number of quotation marks"
2458 ));
2459 exit(1);
2460 }
2461 } while (*cp != '\0' && *cp != '#' &&
2462 (!isascii(*cp) || !isspace((unsigned char) *cp)));
2463 if (isascii(*cp) && isspace((unsigned char) *cp))
2464 ++cp;
2465 *dp = '\0';
2466 }
2467 array[nsubs] = NULL;
2468 return array;
2469 }
2470
2471 static long
2472 oadd(t1, t2)
2473 const long t1;
2474 const long t2;
2475 {
2476 register long t;
2477
2478 t = t1 + t2;
2479 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2480 error(_("time overflow"));
2481 exit(EXIT_FAILURE);
2482 }
2483 return t;
2484 }
2485
2486 static zic_t
2487 tadd(t1, t2)
2488 const zic_t t1;
2489 const long t2;
2490 {
2491 register zic_t t;
2492
2493 if (t1 == max_time && t2 > 0)
2494 return max_time;
2495 if (t1 == min_time && t2 < 0)
2496 return min_time;
2497 t = t1 + t2;
2498 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2499 error(_("time overflow"));
2500 exit(EXIT_FAILURE);
2501 }
2502 return t;
2503 }
2504
2505 /*
2506 ** Given a rule, and a year, compute the date - in seconds since January 1,
2507 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
2508 */
2509
2510 static zic_t
2511 rpytime(rp, wantedy)
2512 register const struct rule * const rp;
2513 register const int wantedy;
2514 {
2515 register int y, m, i;
2516 register long dayoff; /* with a nod to Margaret O. */
2517 register zic_t t;
2518
2519 if (wantedy == INT_MIN)
2520 return min_time;
2521 if (wantedy == INT_MAX)
2522 return max_time;
2523 dayoff = 0;
2524 m = TM_JANUARY;
2525 y = EPOCH_YEAR;
2526 while (wantedy != y) {
2527 if (wantedy > y) {
2528 i = len_years[isleap(y)];
2529 ++y;
2530 } else {
2531 --y;
2532 i = -len_years[isleap(y)];
2533 }
2534 dayoff = oadd(dayoff, eitol(i));
2535 }
2536 while (m != rp->r_month) {
2537 i = len_months[isleap(y)][m];
2538 dayoff = oadd(dayoff, eitol(i));
2539 ++m;
2540 }
2541 i = rp->r_dayofmonth;
2542 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2543 if (rp->r_dycode == DC_DOWLEQ)
2544 --i;
2545 else {
2546 error(_("use of 2/29 in non leap-year"));
2547 exit(EXIT_FAILURE);
2548 }
2549 }
2550 --i;
2551 dayoff = oadd(dayoff, eitol(i));
2552 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2553 register long wday;
2554
2555 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2556 wday = eitol(EPOCH_WDAY);
2557 /*
2558 ** Don't trust mod of negative numbers.
2559 */
2560 if (dayoff >= 0)
2561 wday = (wday + dayoff) % LDAYSPERWEEK;
2562 else {
2563 wday -= ((-dayoff) % LDAYSPERWEEK);
2564 if (wday < 0)
2565 wday += LDAYSPERWEEK;
2566 }
2567 while (wday != eitol(rp->r_wday))
2568 if (rp->r_dycode == DC_DOWGEQ) {
2569 dayoff = oadd(dayoff, (long) 1);
2570 if (++wday >= LDAYSPERWEEK)
2571 wday = 0;
2572 ++i;
2573 } else {
2574 dayoff = oadd(dayoff, (long) -1);
2575 if (--wday < 0)
2576 wday = LDAYSPERWEEK - 1;
2577 --i;
2578 }
2579 if (i < 0 || i >= len_months[isleap(y)][m]) {
2580 if (noise)
2581 warning(_("rule goes past start/end of month--\
2582 will not work with pre-2004 versions of zic"));
2583 }
2584 }
2585 if (dayoff < min_time / SECSPERDAY)
2586 return min_time;
2587 if (dayoff > max_time / SECSPERDAY)
2588 return max_time;
2589 t = (zic_t) dayoff * SECSPERDAY;
2590 return tadd(t, rp->r_tod);
2591 }
2592
2593 static void
2594 newabbr(string)
2595 const char * const string;
2596 {
2597 register int i;
2598
2599 if (strcmp(string, GRANDPARENTED) != 0) {
2600 register const char * cp;
2601 register char * wp;
2602
2603 /*
2604 ** Want one to ZIC_MAX_ABBR_LEN_WO_WARN alphabetics
2605 ** optionally followed by a + or - and a number from 1 to 14.
2606 */
2607 cp = string;
2608 wp = NULL;
2609 while (isascii((unsigned char) *cp) &&
2610 isalpha((unsigned char) *cp))
2611 ++cp;
2612 if (cp - string == 0)
2613 wp = _("time zone abbreviation lacks alphabetic at start");
2614 if (noise && cp - string > 3)
2615 wp = _("time zone abbreviation has more than 3 alphabetics");
2616 if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN)
2617 wp = _("time zone abbreviation has too many alphabetics");
2618 if (wp == NULL && (*cp == '+' || *cp == '-')) {
2619 ++cp;
2620 if (isascii((unsigned char) *cp) &&
2621 isdigit((unsigned char) *cp))
2622 if (*cp++ == '1' &&
2623 *cp >= '0' && *cp <= '4')
2624 ++cp;
2625 }
2626 if (*cp != '\0')
2627 wp = _("time zone abbreviation differs from POSIX standard");
2628 if (wp != NULL) {
2629 wp = ecpyalloc(wp);
2630 wp = ecatalloc(wp, " (");
2631 wp = ecatalloc(wp, string);
2632 wp = ecatalloc(wp, ")");
2633 warning(wp);
2634 ifree(wp);
2635 }
2636 }
2637 i = strlen(string) + 1;
2638 if (charcnt + i > TZ_MAX_CHARS) {
2639 error(_("too many, or too long, time zone abbreviations"));
2640 exit(EXIT_FAILURE);
2641 }
2642 (void) strcpy(&chars[charcnt], string);
2643 charcnt += eitol(i);
2644 }
2645
2646 static int
2647 mkdirs(argname)
2648 char * argname;
2649 {
2650 register char * name;
2651 register char * cp;
2652
2653 if (argname == NULL || *argname == '\0')
2654 return 0;
2655 cp = name = ecpyalloc(argname);
2656 while ((cp = strchr(cp + 1, '/')) != 0) {
2657 *cp = '\0';
2658 #ifndef unix
2659 /*
2660 ** DOS drive specifier?
2661 */
2662 if (isalpha((unsigned char) name[0]) &&
2663 name[1] == ':' && name[2] == '\0') {
2664 *cp = '/';
2665 continue;
2666 }
2667 #endif /* !defined unix */
2668 if (!itsdir(name)) {
2669 /*
2670 ** It doesn't seem to exist, so we try to create it.
2671 ** Creation may fail because of the directory being
2672 ** created by some other multiprocessor, so we get
2673 ** to do extra checking.
2674 */
2675 if (mkdir(name, MKDIR_UMASK) != 0) {
2676 const char *e = strerror(errno);
2677
2678 if (errno != EEXIST || !itsdir(name)) {
2679 (void) fprintf(stderr,
2680 _("%s: Can't create directory %s: %s\n"),
2681 progname, name, e);
2682 ifree(name);
2683 return -1;
2684 }
2685 }
2686 }
2687 *cp = '/';
2688 }
2689 ifree(name);
2690 return 0;
2691 }
2692
2693 static long
2694 eitol(i)
2695 const int i;
2696 {
2697 long l;
2698
2699 l = i;
2700 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2701 (void) fprintf(stderr,
2702 _("%s: %d did not sign extend correctly\n"),
2703 progname, i);
2704 exit(EXIT_FAILURE);
2705 }
2706 return l;
2707 }
2708
2709 /*
2710 ** UNIX was a registered trademark of The Open Group in 2003.
2711 */
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