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2.5-18.1
[glibc.git] / timezone / zic.c
blobf7393ea7ba307fb0cabaaf03411353d8f5393efc
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 8.7";
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 P((int argc, char * const argv[],
103 const char * options));
104 extern int link P((const char * fromname, const char * toname));
105 extern char * optarg;
106 extern int optind;
107
108 static void addtt P((zic_t starttime, int type));
109 static int addtype P((long gmtoff, const char * abbr, int isdst,
110 int ttisstd, int ttisgmt));
111 static void leapadd P((zic_t t, int positive, int rolling, int count));
112 static void adjleap P((void));
113 static void associate P((void));
114 static int ciequal P((const char * ap, const char * bp));
115 static void convert P((long val, char * buf));
116 static void convert64 P((zic_t val, char * buf));
117 static void dolink P((const char * fromfile, const char * tofile));
118 static void doabbr P((char * abbr, const char * format,
119 const char * letters, int isdst, int doquotes));
120 static void eat P((const char * name, int num));
121 static void eats P((const char * name, int num,
122 const char * rname, int rnum));
123 static long eitol P((int i));
124 static void error P((const char * message));
125 static char ** getfields P((char * buf));
126 static long gethms P((const char * string, const char * errstrng,
127 int signable));
128 static void infile P((const char * filename));
129 static void inleap P((char ** fields, int nfields));
130 static void inlink P((char ** fields, int nfields));
131 static void inrule P((char ** fields, int nfields));
132 static int inzcont P((char ** fields, int nfields));
133 static int inzone P((char ** fields, int nfields));
134 static int inzsub P((char ** fields, int nfields, int iscont));
135 static int is32 P((zic_t x));
136 static int itsabbr P((const char * abbr, const char * word));
137 static int itsdir P((const char * name));
138 static int lowerit P((int c));
139 static char * memcheck P((char * tocheck));
140 static int mkdirs P((char * filename));
141 static void newabbr P((const char * abbr));
142 static long oadd P((long t1, long t2));
143 static void outzone P((const struct zone * zp, int ntzones));
144 static void puttzcode P((long code, FILE * fp));
145 static void puttzcode64 P((zic_t code, FILE * fp));
146 static int rcomp P((const void * leftp, const void * rightp));
147 static zic_t rpytime P((const struct rule * rp, int wantedy));
148 static void rulesub P((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 P((char * result, long offset));
153 static int stringrule P((char * result, const struct rule * rp,
154 long dstoff, long gmtoff));
155 static void stringzone P((char * result,
156 const struct zone * zp, int ntzones));
157 static void setboundaries P((void));
158 static zic_t tadd P((zic_t t1, long t2));
159 static void usage P((void));
160 static void writezone P((const char * name, const char * string));
161 static int yearistype P((int year, const char * type));
162
163 #if !HAVE_STRERROR
164 static char * strerror P((int));
165 #endif /* !HAVE_STRERROR */
166
167 static int charcnt;
168 static int errors;
169 static const char * filename;
170 static int leapcnt;
171 static int leapseen;
172 static int leapminyear;
173 static int leapmaxyear;
174 static int linenum;
175 static int max_abbrvar_len;
176 static int max_format_len;
177 static zic_t max_time;
178 static int max_year;
179 static zic_t min_time;
180 static int min_year;
181 static int noise;
182 static const char * rfilename;
183 static int rlinenum;
184 static const char * progname;
185 static int timecnt;
186 static int typecnt;
187
188 /*
189 ** Line codes.
190 */
191
192 #define LC_RULE 0
193 #define LC_ZONE 1
194 #define LC_LINK 2
195 #define LC_LEAP 3
196
197 /*
198 ** Which fields are which on a Zone line.
199 */
200
201 #define ZF_NAME 1
202 #define ZF_GMTOFF 2
203 #define ZF_RULE 3
204 #define ZF_FORMAT 4
205 #define ZF_TILYEAR 5
206 #define ZF_TILMONTH 6
207 #define ZF_TILDAY 7
208 #define ZF_TILTIME 8
209 #define ZONE_MINFIELDS 5
210 #define ZONE_MAXFIELDS 9
211
212 /*
213 ** Which fields are which on a Zone continuation line.
214 */
215
216 #define ZFC_GMTOFF 0
217 #define ZFC_RULE 1
218 #define ZFC_FORMAT 2
219 #define ZFC_TILYEAR 3
220 #define ZFC_TILMONTH 4
221 #define ZFC_TILDAY 5
222 #define ZFC_TILTIME 6
223 #define ZONEC_MINFIELDS 3
224 #define ZONEC_MAXFIELDS 7
225
226 /*
227 ** Which files are which on a Rule line.
228 */
229
230 #define RF_NAME 1
231 #define RF_LOYEAR 2
232 #define RF_HIYEAR 3
233 #define RF_COMMAND 4
234 #define RF_MONTH 5
235 #define RF_DAY 6
236 #define RF_TOD 7
237 #define RF_STDOFF 8
238 #define RF_ABBRVAR 9
239 #define RULE_FIELDS 10
240
241 /*
242 ** Which fields are which on a Link line.
243 */
244
245 #define LF_FROM 1
246 #define LF_TO 2
247 #define LINK_FIELDS 3
248
249 /*
250 ** Which fields are which on a Leap line.
251 */
252
253 #define LP_YEAR 1
254 #define LP_MONTH 2
255 #define LP_DAY 3
256 #define LP_TIME 4
257 #define LP_CORR 5
258 #define LP_ROLL 6
259 #define LEAP_FIELDS 7
260
261 /*
262 ** Year synonyms.
263 */
264
265 #define YR_MINIMUM 0
266 #define YR_MAXIMUM 1
267 #define YR_ONLY 2
268
269 static struct rule * rules;
270 static int nrules; /* number of rules */
271
272 static struct zone * zones;
273 static int nzones; /* number of zones */
274
275 struct link {
276 const char * l_filename;
277 int l_linenum;
278 const char * l_from;
279 const char * l_to;
280 };
281
282 static struct link * links;
283 static int nlinks;
284
285 struct lookup {
286 const char * l_word;
287 const int l_value;
288 };
289
290 static struct lookup const * byword P((const char * string,
291 const struct lookup * lp));
292
293 static struct lookup const line_codes[] = {
294 { "Rule", LC_RULE },
295 { "Zone", LC_ZONE },
296 { "Link", LC_LINK },
297 { "Leap", LC_LEAP },
298 { NULL, 0}
299 };
300
301 static struct lookup const mon_names[] = {
302 { "January", TM_JANUARY },
303 { "February", TM_FEBRUARY },
304 { "March", TM_MARCH },
305 { "April", TM_APRIL },
306 { "May", TM_MAY },
307 { "June", TM_JUNE },
308 { "July", TM_JULY },
309 { "August", TM_AUGUST },
310 { "September", TM_SEPTEMBER },
311 { "October", TM_OCTOBER },
312 { "November", TM_NOVEMBER },
313 { "December", TM_DECEMBER },
314 { NULL, 0 }
315 };
316
317 static struct lookup const wday_names[] = {
318 { "Sunday", TM_SUNDAY },
319 { "Monday", TM_MONDAY },
320 { "Tuesday", TM_TUESDAY },
321 { "Wednesday", TM_WEDNESDAY },
322 { "Thursday", TM_THURSDAY },
323 { "Friday", TM_FRIDAY },
324 { "Saturday", TM_SATURDAY },
325 { NULL, 0 }
326 };
327
328 static struct lookup const lasts[] = {
329 { "last-Sunday", TM_SUNDAY },
330 { "last-Monday", TM_MONDAY },
331 { "last-Tuesday", TM_TUESDAY },
332 { "last-Wednesday", TM_WEDNESDAY },
333 { "last-Thursday", TM_THURSDAY },
334 { "last-Friday", TM_FRIDAY },
335 { "last-Saturday", TM_SATURDAY },
336 { NULL, 0 }
337 };
338
339 static struct lookup const begin_years[] = {
340 { "minimum", YR_MINIMUM },
341 { "maximum", YR_MAXIMUM },
342 { NULL, 0 }
343 };
344
345 static struct lookup const end_years[] = {
346 { "minimum", YR_MINIMUM },
347 { "maximum", YR_MAXIMUM },
348 { "only", YR_ONLY },
349 { NULL, 0 }
350 };
351
352 static struct lookup const leap_types[] = {
353 { "Rolling", TRUE },
354 { "Stationary", FALSE },
355 { NULL, 0 }
356 };
357
358 static const int len_months[2][MONSPERYEAR] = {
359 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
360 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
361 };
362
363 static const int len_years[2] = {
364 DAYSPERNYEAR, DAYSPERLYEAR
365 };
366
367 static struct attype {
368 zic_t at;
369 unsigned char type;
370 } attypes[TZ_MAX_TIMES];
371 static long gmtoffs[TZ_MAX_TYPES];
372 static char isdsts[TZ_MAX_TYPES];
373 static unsigned char abbrinds[TZ_MAX_TYPES];
374 static char ttisstds[TZ_MAX_TYPES];
375 static char ttisgmts[TZ_MAX_TYPES];
376 static char chars[TZ_MAX_CHARS];
377 static zic_t trans[TZ_MAX_LEAPS];
378 static long corr[TZ_MAX_LEAPS];
379 static char roll[TZ_MAX_LEAPS];
380
381 /*
382 ** Memory allocation.
383 */
384
385 static char *
386 memcheck(ptr)
387 char * const ptr;
388 {
389 if (ptr == NULL) {
390 const char *e = strerror(errno);
391
392 (void) fprintf(stderr, _("%s: Memory exhausted: %s\n"),
393 progname, e);
394 exit(EXIT_FAILURE);
395 }
396 return ptr;
397 }
398
399 #define emalloc(size) memcheck(imalloc(size))
400 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
401 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
402 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
403
404 /*
405 ** Error handling.
406 */
407
408 #if !HAVE_STRERROR
409 static char *
410 strerror(errnum)
411 int errnum;
412 {
413 extern char * sys_errlist[];
414 extern int sys_nerr;
415
416 return (errnum > 0 && errnum <= sys_nerr) ?
417 sys_errlist[errnum] : _("Unknown system error");
418 }
419 #endif /* !HAVE_STRERROR */
420
421 static void
422 eats(name, num, rname, rnum)
423 const char * const name;
424 const int num;
425 const char * const rname;
426 const int rnum;
427 {
428 filename = name;
429 linenum = num;
430 rfilename = rname;
431 rlinenum = rnum;
432 }
433
434 static void
435 eat(name, num)
436 const char * const name;
437 const int num;
438 {
439 eats(name, num, (char *) NULL, -1);
440 }
441
442 static void
443 error(string)
444 const char * const string;
445 {
446 /*
447 ** Match the format of "cc" to allow sh users to
448 ** zic ... 2>&1 | error -t "*" -v
449 ** on BSD systems.
450 */
451 (void) fprintf(stderr, _("\"%s\", line %d: %s"),
452 filename, linenum, string);
453 if (rfilename != NULL)
454 (void) fprintf(stderr, _(" (rule from \"%s\", line %d)"),
455 rfilename, rlinenum);
456 (void) fprintf(stderr, "\n");
457 ++errors;
458 }
459
460 static void
461 warning(string)
462 const char * const string;
463 {
464 char * cp;
465
466 cp = ecpyalloc(_("warning: "));
467 cp = ecatalloc(cp, string);
468 error(cp);
469 ifree(cp);
470 --errors;
471 }
472
473 static void
474 usage P((void))
475 {
476 (void) fprintf(stderr, _("%s: usage is %s \
477 [ --version ] [ -v ] [ -l localtime ] [ -p posixrules ] \\\n\
478 \t[ -d directory ] [ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n"),
479 progname, progname);
480 exit(EXIT_FAILURE);
481 }
482
483 static const char * psxrules;
484 static const char * lcltime;
485 static const char * directory;
486 static const char * leapsec;
487 static const char * yitcommand;
488
489 int
490 main(argc, argv)
491 int argc;
492 char * argv[];
493 {
494 register int i;
495 register int j;
496 register int c;
497
498 #ifdef unix
499 (void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
500 #endif /* defined unix */
501 #if HAVE_GETTEXT
502 (void) setlocale(LC_ALL, "");
503 #ifdef TZ_DOMAINDIR
504 (void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
505 #endif /* defined TEXTDOMAINDIR */
506 (void) textdomain(TZ_DOMAIN);
507 #endif /* HAVE_GETTEXT */
508 progname = argv[0];
509 if (TYPE_BIT(zic_t) < 64) {
510 (void) fprintf(stderr, "%s: %s\n", progname,
511 _("wild compilation-time specification of zic_t"));
512 exit(EXIT_FAILURE);
513 }
514 for (i = 1; i < argc; ++i)
515 if (strcmp(argv[i], "--version") == 0) {
516 (void) printf("%s\n", elsieid);
517 exit(EXIT_SUCCESS);
518 }
519 while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF && c != -1)
520 switch (c) {
521 default:
522 usage();
523 case 'd':
524 if (directory == NULL)
525 directory = optarg;
526 else {
527 (void) fprintf(stderr,
528 _("%s: More than one -d option specified\n"),
529 progname);
530 exit(EXIT_FAILURE);
531 }
532 break;
533 case 'l':
534 if (lcltime == NULL)
535 lcltime = optarg;
536 else {
537 (void) fprintf(stderr,
538 _("%s: More than one -l option specified\n"),
539 progname);
540 exit(EXIT_FAILURE);
541 }
542 break;
543 case 'p':
544 if (psxrules == NULL)
545 psxrules = optarg;
546 else {
547 (void) fprintf(stderr,
548 _("%s: More than one -p option specified\n"),
549 progname);
550 exit(EXIT_FAILURE);
551 }
552 break;
553 case 'y':
554 if (yitcommand == NULL)
555 yitcommand = optarg;
556 else {
557 (void) fprintf(stderr,
558 _("%s: More than one -y option specified\n"),
559 progname);
560 exit(EXIT_FAILURE);
561 }
562 break;
563 case 'L':
564 if (leapsec == NULL)
565 leapsec = optarg;
566 else {
567 (void) fprintf(stderr,
568 _("%s: More than one -L option specified\n"),
569 progname);
570 exit(EXIT_FAILURE);
571 }
572 break;
573 case 'v':
574 noise = TRUE;
575 break;
576 case 's':
577 (void) printf("%s: -s ignored\n", progname);
578 break;
579 }
580 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
581 usage(); /* usage message by request */
582 if (directory == NULL)
583 directory = TZDIR;
584 if (yitcommand == NULL)
585 yitcommand = "yearistype";
586
587 setboundaries();
588
589 if (optind < argc && leapsec != NULL) {
590 infile(leapsec);
591 adjleap();
592 }
593
594 for (i = optind; i < argc; ++i)
595 infile(argv[i]);
596 if (errors)
597 exit(EXIT_FAILURE);
598 associate();
599 for (i = 0; i < nzones; i = j) {
600 /*
601 ** Find the next non-continuation zone entry.
602 */
603 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
604 continue;
605 outzone(&zones[i], j - i);
606 }
607 /*
608 ** Make links.
609 */
610 for (i = 0; i < nlinks; ++i) {
611 eat(links[i].l_filename, links[i].l_linenum);
612 dolink(links[i].l_from, links[i].l_to);
613 if (noise)
614 for (j = 0; j < nlinks; ++j)
615 if (strcmp(links[i].l_to,
616 links[j].l_from) == 0)
617 warning(_("link to link"));
618 }
619 if (lcltime != NULL) {
620 eat("command line", 1);
621 dolink(lcltime, TZDEFAULT);
622 }
623 if (psxrules != NULL) {
624 eat("command line", 1);
625 dolink(psxrules, TZDEFRULES);
626 }
627 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
628 }
629
630 static void
631 dolink(fromfile, tofile)
632 const char * const fromfile;
633 const char * const tofile;
634 {
635 register char * fromname;
636 register char * toname;
637
638 if (fromfile[0] == '/')
639 fromname = ecpyalloc(fromfile);
640 else {
641 fromname = ecpyalloc(directory);
642 fromname = ecatalloc(fromname, "/");
643 fromname = ecatalloc(fromname, fromfile);
644 }
645 if (tofile[0] == '/')
646 toname = ecpyalloc(tofile);
647 else {
648 toname = ecpyalloc(directory);
649 toname = ecatalloc(toname, "/");
650 toname = ecatalloc(toname, tofile);
651 }
652 /*
653 ** We get to be careful here since
654 ** there's a fair chance of root running us.
655 */
656 if (!itsdir(toname))
657 (void) remove(toname);
658 if (link(fromname, toname) != 0) {
659 int result;
660
661 if (mkdirs(toname) != 0)
662 exit(EXIT_FAILURE);
663
664 result = link(fromname, toname);
665 #if HAVE_SYMLINK
666 if (result != 0 &&
667 access(fromname, F_OK) == 0 &&
668 !itsdir(fromname)) {
669 const char *s = tofile;
670 register char * symlinkcontents = NULL;
671
672 while ((s = strchr(s+1, '/')) != NULL)
673 symlinkcontents =
674 ecatalloc(symlinkcontents,
675 "../");
676 symlinkcontents =
677 ecatalloc(symlinkcontents,
678 fromname);
679 result = symlink(symlinkcontents,
680 toname);
681 if (result == 0)
682 warning(_("hard link failed, symbolic link used"));
683 ifree(symlinkcontents);
684 }
685 #endif /* HAVE_SYMLINK */
686 if (result != 0) {
687 const char *e = strerror(errno);
688
689 (void) fprintf(stderr,
690 _("%s: Can't link from %s to %s: %s\n"),
691 progname, fromname, toname, e);
692 exit(EXIT_FAILURE);
693 }
694 }
695 ifree(fromname);
696 ifree(toname);
697 }
698
699 #define TIME_T_BITS_IN_FILE 64
700
701 static void
702 setboundaries P((void))
703 {
704 register int i;
705
706 min_time = -1;
707 for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i)
708 min_time *= 2;
709 max_time = -(min_time + 1);
710 }
711
712 static int
713 itsdir(name)
714 const char * const name;
715 {
716 register char * myname;
717 register int accres;
718
719 myname = ecpyalloc(name);
720 myname = ecatalloc(myname, "/.");
721 accres = access(myname, F_OK);
722 ifree(myname);
723 return accres == 0;
724 }
725
726 /*
727 ** Associate sets of rules with zones.
728 */
729
730 /*
731 ** Sort by rule name.
732 */
733
734 static int
735 rcomp(cp1, cp2)
736 const void * cp1;
737 const void * cp2;
738 {
739 return strcmp(((const struct rule *) cp1)->r_name,
740 ((const struct rule *) cp2)->r_name);
741 }
742
743 static void
744 associate P((void))
745 {
746 register struct zone * zp;
747 register struct rule * rp;
748 register int base, out;
749 register int i, j;
750
751 if (nrules != 0) {
752 (void) qsort((void *) rules, (size_t) nrules,
753 (size_t) sizeof *rules, rcomp);
754 for (i = 0; i < nrules - 1; ++i) {
755 if (strcmp(rules[i].r_name,
756 rules[i + 1].r_name) != 0)
757 continue;
758 if (strcmp(rules[i].r_filename,
759 rules[i + 1].r_filename) == 0)
760 continue;
761 eat(rules[i].r_filename, rules[i].r_linenum);
762 warning(_("same rule name in multiple files"));
763 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
764 warning(_("same rule name in multiple files"));
765 for (j = i + 2; j < nrules; ++j) {
766 if (strcmp(rules[i].r_name,
767 rules[j].r_name) != 0)
768 break;
769 if (strcmp(rules[i].r_filename,
770 rules[j].r_filename) == 0)
771 continue;
772 if (strcmp(rules[i + 1].r_filename,
773 rules[j].r_filename) == 0)
774 continue;
775 break;
776 }
777 i = j - 1;
778 }
779 }
780 for (i = 0; i < nzones; ++i) {
781 zp = &zones[i];
782 zp->z_rules = NULL;
783 zp->z_nrules = 0;
784 }
785 for (base = 0; base < nrules; base = out) {
786 rp = &rules[base];
787 for (out = base + 1; out < nrules; ++out)
788 if (strcmp(rp->r_name, rules[out].r_name) != 0)
789 break;
790 for (i = 0; i < nzones; ++i) {
791 zp = &zones[i];
792 if (strcmp(zp->z_rule, rp->r_name) != 0)
793 continue;
794 zp->z_rules = rp;
795 zp->z_nrules = out - base;
796 }
797 }
798 for (i = 0; i < nzones; ++i) {
799 zp = &zones[i];
800 if (zp->z_nrules == 0) {
801 /*
802 ** Maybe we have a local standard time offset.
803 */
804 eat(zp->z_filename, zp->z_linenum);
805 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
806 TRUE);
807 /*
808 ** Note, though, that if there's no rule,
809 ** a '%s' in the format is a bad thing.
810 */
811 if (strchr(zp->z_format, '%') != 0)
812 error(_("%s in ruleless zone"));
813 }
814 }
815 if (errors)
816 exit(EXIT_FAILURE);
817 }
818
819 static void
820 infile(name)
821 const char * name;
822 {
823 register FILE * fp;
824 register char ** fields;
825 register char * cp;
826 register const struct lookup * lp;
827 register int nfields;
828 register int wantcont;
829 register int num;
830 char buf[BUFSIZ];
831
832 if (strcmp(name, "-") == 0) {
833 name = _("standard input");
834 fp = stdin;
835 } else if ((fp = fopen(name, "r")) == NULL) {
836 const char *e = strerror(errno);
837
838 (void) fprintf(stderr, _("%s: Can't open %s: %s\n"),
839 progname, name, e);
840 exit(EXIT_FAILURE);
841 }
842 wantcont = FALSE;
843 for (num = 1; ; ++num) {
844 eat(name, num);
845 if (fgets(buf, (int) sizeof buf, fp) != buf)
846 break;
847 cp = strchr(buf, '\n');
848 if (cp == NULL) {
849 error(_("line too long"));
850 exit(EXIT_FAILURE);
851 }
852 *cp = '\0';
853 fields = getfields(buf);
854 nfields = 0;
855 while (fields[nfields] != NULL) {
856 static char nada;
857
858 if (strcmp(fields[nfields], "-") == 0)
859 fields[nfields] = &nada;
860 ++nfields;
861 }
862 if (nfields == 0) {
863 /* nothing to do */
864 } else if (wantcont) {
865 wantcont = inzcont(fields, nfields);
866 } else {
867 lp = byword(fields[0], line_codes);
868 if (lp == NULL)
869 error(_("input line of unknown type"));
870 else switch ((int) (lp->l_value)) {
871 case LC_RULE:
872 inrule(fields, nfields);
873 wantcont = FALSE;
874 break;
875 case LC_ZONE:
876 wantcont = inzone(fields, nfields);
877 break;
878 case LC_LINK:
879 inlink(fields, nfields);
880 wantcont = FALSE;
881 break;
882 case LC_LEAP:
883 if (name != leapsec)
884 (void) fprintf(stderr,
885 _("%s: Leap line in non leap seconds file %s\n"),
886 progname, name);
887 else inleap(fields, nfields);
888 wantcont = FALSE;
889 break;
890 default: /* "cannot happen" */
891 (void) fprintf(stderr,
892 _("%s: panic: Invalid l_value %d\n"),
893 progname, lp->l_value);
894 exit(EXIT_FAILURE);
895 }
896 }
897 ifree((char *) fields);
898 }
899 if (ferror(fp)) {
900 (void) fprintf(stderr, _("%s: Error reading %s\n"),
901 progname, filename);
902 exit(EXIT_FAILURE);
903 }
904 if (fp != stdin && fclose(fp)) {
905 const char *e = strerror(errno);
906
907 (void) fprintf(stderr, _("%s: Error closing %s: %s\n"),
908 progname, filename, e);
909 exit(EXIT_FAILURE);
910 }
911 if (wantcont)
912 error(_("expected continuation line not found"));
913 }
914
915 /*
916 ** Convert a string of one of the forms
917 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
918 ** into a number of seconds.
919 ** A null string maps to zero.
920 ** Call error with errstring and return zero on errors.
921 */
922
923 static long
924 gethms(string, errstring, signable)
925 const char * string;
926 const char * const errstring;
927 const int signable;
928 {
929 int hh, mm, ss, sign;
930
931 if (string == NULL || *string == '\0')
932 return 0;
933 if (!signable)
934 sign = 1;
935 else if (*string == '-') {
936 sign = -1;
937 ++string;
938 } else sign = 1;
939 if (sscanf(string, scheck(string, "%d"), &hh) == 1)
940 mm = ss = 0;
941 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
942 ss = 0;
943 else if (sscanf(string, scheck(string, "%d:%d:%d"),
944 &hh, &mm, &ss) != 3) {
945 error(errstring);
946 return 0;
947 }
948 if ((hh < 0 || hh >= HOURSPERDAY ||
949 mm < 0 || mm >= MINSPERHOUR ||
950 ss < 0 || ss > SECSPERMIN) &&
951 !(hh == HOURSPERDAY && mm == 0 && ss == 0)) {
952 error(errstring);
953 return 0;
954 }
955 if (noise && hh == HOURSPERDAY)
956 warning(_("24:00 not handled by pre-1998 versions of zic"));
957 return eitol(sign) *
958 (eitol(hh * MINSPERHOUR + mm) *
959 eitol(SECSPERMIN) + eitol(ss));
960 }
961
962 static void
963 inrule(fields, nfields)
964 register char ** const fields;
965 const int nfields;
966 {
967 static struct rule r;
968
969 if (nfields != RULE_FIELDS) {
970 error(_("wrong number of fields on Rule line"));
971 return;
972 }
973 if (*fields[RF_NAME] == '\0') {
974 error(_("nameless rule"));
975 return;
976 }
977 r.r_filename = filename;
978 r.r_linenum = linenum;
979 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
980 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
981 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
982 r.r_name = ecpyalloc(fields[RF_NAME]);
983 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
984 if (max_abbrvar_len < strlen(r.r_abbrvar))
985 max_abbrvar_len = strlen(r.r_abbrvar);
986 rules = (struct rule *) (void *) erealloc((char *) rules,
987 (int) ((nrules + 1) * sizeof *rules));
988 rules[nrules++] = r;
989 }
990
991 static int
992 inzone(fields, nfields)
993 register char ** const fields;
994 const int nfields;
995 {
996 register int i;
997 static char * buf;
998
999 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
1000 error(_("wrong number of fields on Zone line"));
1001 return FALSE;
1002 }
1003 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
1004 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
1005 (void) sprintf(buf,
1006 _("\"Zone %s\" line and -l option are mutually exclusive"),
1007 TZDEFAULT);
1008 error(buf);
1009 return FALSE;
1010 }
1011 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
1012 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
1013 (void) sprintf(buf,
1014 _("\"Zone %s\" line and -p option are mutually exclusive"),
1015 TZDEFRULES);
1016 error(buf);
1017 return FALSE;
1018 }
1019 for (i = 0; i < nzones; ++i)
1020 if (zones[i].z_name != NULL &&
1021 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
1022 buf = erealloc(buf, (int) (132 +
1023 strlen(fields[ZF_NAME]) +
1024 strlen(zones[i].z_filename)));
1025 (void) sprintf(buf,
1026 _("duplicate zone name %s (file \"%s\", line %d)"),
1027 fields[ZF_NAME],
1028 zones[i].z_filename,
1029 zones[i].z_linenum);
1030 error(buf);
1031 return FALSE;
1032 }
1033 return inzsub(fields, nfields, FALSE);
1034 }
1035
1036 static int
1037 inzcont(fields, nfields)
1038 register char ** const fields;
1039 const int nfields;
1040 {
1041 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
1042 error(_("wrong number of fields on Zone continuation line"));
1043 return FALSE;
1044 }
1045 return inzsub(fields, nfields, TRUE);
1046 }
1047
1048 static int
1049 inzsub(fields, nfields, iscont)
1050 register char ** const fields;
1051 const int nfields;
1052 const int iscont;
1053 {
1054 register char * cp;
1055 static struct zone z;
1056 register int i_gmtoff, i_rule, i_format;
1057 register int i_untilyear, i_untilmonth;
1058 register int i_untilday, i_untiltime;
1059 register int hasuntil;
1060
1061 if (iscont) {
1062 i_gmtoff = ZFC_GMTOFF;
1063 i_rule = ZFC_RULE;
1064 i_format = ZFC_FORMAT;
1065 i_untilyear = ZFC_TILYEAR;
1066 i_untilmonth = ZFC_TILMONTH;
1067 i_untilday = ZFC_TILDAY;
1068 i_untiltime = ZFC_TILTIME;
1069 z.z_name = NULL;
1070 } else {
1071 i_gmtoff = ZF_GMTOFF;
1072 i_rule = ZF_RULE;
1073 i_format = ZF_FORMAT;
1074 i_untilyear = ZF_TILYEAR;
1075 i_untilmonth = ZF_TILMONTH;
1076 i_untilday = ZF_TILDAY;
1077 i_untiltime = ZF_TILTIME;
1078 z.z_name = ecpyalloc(fields[ZF_NAME]);
1079 }
1080 z.z_filename = filename;
1081 z.z_linenum = linenum;
1082 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UTC offset"), TRUE);
1083 if ((cp = strchr(fields[i_format], '%')) != 0) {
1084 if (*++cp != 's' || strchr(cp, '%') != 0) {
1085 error(_("invalid abbreviation format"));
1086 return FALSE;
1087 }
1088 }
1089 z.z_rule = ecpyalloc(fields[i_rule]);
1090 z.z_format = ecpyalloc(fields[i_format]);
1091 if (max_format_len < strlen(z.z_format))
1092 max_format_len = strlen(z.z_format);
1093 hasuntil = nfields > i_untilyear;
1094 if (hasuntil) {
1095 z.z_untilrule.r_filename = filename;
1096 z.z_untilrule.r_linenum = linenum;
1097 rulesub(&z.z_untilrule,
1098 fields[i_untilyear],
1099 "only",
1100 "",
1101 (nfields > i_untilmonth) ?
1102 fields[i_untilmonth] : "Jan",
1103 (nfields > i_untilday) ? fields[i_untilday] : "1",
1104 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1105 z.z_untiltime = rpytime(&z.z_untilrule,
1106 z.z_untilrule.r_loyear);
1107 if (iscont && nzones > 0 &&
1108 z.z_untiltime > min_time &&
1109 z.z_untiltime < max_time &&
1110 zones[nzones - 1].z_untiltime > min_time &&
1111 zones[nzones - 1].z_untiltime < max_time &&
1112 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1113 error(_(
1114 "Zone continuation line end time is not after end time of previous line"
1115 ));
1116 return FALSE;
1117 }
1118 }
1119 zones = (struct zone *) (void *) erealloc((char *) zones,
1120 (int) ((nzones + 1) * sizeof *zones));
1121 zones[nzones++] = z;
1122 /*
1123 ** If there was an UNTIL field on this line,
1124 ** there's more information about the zone on the next line.
1125 */
1126 return hasuntil;
1127 }
1128
1129 static void
1130 inleap(fields, nfields)
1131 register char ** const fields;
1132 const int nfields;
1133 {
1134 register const char * cp;
1135 register const struct lookup * lp;
1136 register int i, j;
1137 int year, month, day;
1138 long dayoff, tod;
1139 zic_t t;
1140
1141 if (nfields != LEAP_FIELDS) {
1142 error(_("wrong number of fields on Leap line"));
1143 return;
1144 }
1145 dayoff = 0;
1146 cp = fields[LP_YEAR];
1147 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1148 /*
1149 ** Leapin' Lizards!
1150 */
1151 error(_("invalid leaping year"));
1152 return;
1153 }
1154 if (!leapseen || leapmaxyear < year)
1155 leapmaxyear = year;
1156 if (!leapseen || leapminyear > year)
1157 leapminyear = year;
1158 leapseen = TRUE;
1159 j = EPOCH_YEAR;
1160 while (j != year) {
1161 if (year > j) {
1162 i = len_years[isleap(j)];
1163 ++j;
1164 } else {
1165 --j;
1166 i = -len_years[isleap(j)];
1167 }
1168 dayoff = oadd(dayoff, eitol(i));
1169 }
1170 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1171 error(_("invalid month name"));
1172 return;
1173 }
1174 month = lp->l_value;
1175 j = TM_JANUARY;
1176 while (j != month) {
1177 i = len_months[isleap(year)][j];
1178 dayoff = oadd(dayoff, eitol(i));
1179 ++j;
1180 }
1181 cp = fields[LP_DAY];
1182 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1183 day <= 0 || day > len_months[isleap(year)][month]) {
1184 error(_("invalid day of month"));
1185 return;
1186 }
1187 dayoff = oadd(dayoff, eitol(day - 1));
1188 if (dayoff < 0 && !TYPE_SIGNED(zic_t)) {
1189 error(_("time before zero"));
1190 return;
1191 }
1192 if (dayoff < min_time / SECSPERDAY) {
1193 error(_("time too small"));
1194 return;
1195 }
1196 if (dayoff > max_time / SECSPERDAY) {
1197 error(_("time too large"));
1198 return;
1199 }
1200 t = (zic_t) dayoff * SECSPERDAY;
1201 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1202 cp = fields[LP_CORR];
1203 {
1204 register int positive;
1205 int count;
1206
1207 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1208 positive = FALSE;
1209 count = 1;
1210 } else if (strcmp(cp, "--") == 0) {
1211 positive = FALSE;
1212 count = 2;
1213 } else if (strcmp(cp, "+") == 0) {
1214 positive = TRUE;
1215 count = 1;
1216 } else if (strcmp(cp, "++") == 0) {
1217 positive = TRUE;
1218 count = 2;
1219 } else {
1220 error(_("illegal CORRECTION field on Leap line"));
1221 return;
1222 }
1223 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1224 error(_(
1225 "illegal Rolling/Stationary field on Leap line"
1226 ));
1227 return;
1228 }
1229 leapadd(tadd(t, tod), positive, lp->l_value, count);
1230 }
1231 }
1232
1233 static void
1234 inlink(fields, nfields)
1235 register char ** const fields;
1236 const int nfields;
1237 {
1238 struct link l;
1239
1240 if (nfields != LINK_FIELDS) {
1241 error(_("wrong number of fields on Link line"));
1242 return;
1243 }
1244 if (*fields[LF_FROM] == '\0') {
1245 error(_("blank FROM field on Link line"));
1246 return;
1247 }
1248 if (*fields[LF_TO] == '\0') {
1249 error(_("blank TO field on Link line"));
1250 return;
1251 }
1252 l.l_filename = filename;
1253 l.l_linenum = linenum;
1254 l.l_from = ecpyalloc(fields[LF_FROM]);
1255 l.l_to = ecpyalloc(fields[LF_TO]);
1256 links = (struct link *) (void *) erealloc((char *) links,
1257 (int) ((nlinks + 1) * sizeof *links));
1258 links[nlinks++] = l;
1259 }
1260
1261 static void
1262 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1263 register struct rule * const rp;
1264 const char * const loyearp;
1265 const char * const hiyearp;
1266 const char * const typep;
1267 const char * const monthp;
1268 const char * const dayp;
1269 const char * const timep;
1270 {
1271 register const struct lookup * lp;
1272 register const char * cp;
1273 register char * dp;
1274 register char * ep;
1275
1276 if ((lp = byword(monthp, mon_names)) == NULL) {
1277 error(_("invalid month name"));
1278 return;
1279 }
1280 rp->r_month = lp->l_value;
1281 rp->r_todisstd = FALSE;
1282 rp->r_todisgmt = FALSE;
1283 dp = ecpyalloc(timep);
1284 if (*dp != '\0') {
1285 ep = dp + strlen(dp) - 1;
1286 switch (lowerit(*ep)) {
1287 case 's': /* Standard */
1288 rp->r_todisstd = TRUE;
1289 rp->r_todisgmt = FALSE;
1290 *ep = '\0';
1291 break;
1292 case 'w': /* Wall */
1293 rp->r_todisstd = FALSE;
1294 rp->r_todisgmt = FALSE;
1295 *ep = '\0';
1296 break;
1297 case 'g': /* Greenwich */
1298 case 'u': /* Universal */
1299 case 'z': /* Zulu */
1300 rp->r_todisstd = TRUE;
1301 rp->r_todisgmt = TRUE;
1302 *ep = '\0';
1303 break;
1304 }
1305 }
1306 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1307 ifree(dp);
1308 /*
1309 ** Year work.
1310 */
1311 cp = loyearp;
1312 lp = byword(cp, begin_years);
1313 rp->r_lowasnum = lp == NULL;
1314 if (!rp->r_lowasnum) switch ((int) lp->l_value) {
1315 case YR_MINIMUM:
1316 rp->r_loyear = INT_MIN;
1317 break;
1318 case YR_MAXIMUM:
1319 rp->r_loyear = INT_MAX;
1320 break;
1321 default: /* "cannot happen" */
1322 (void) fprintf(stderr,
1323 _("%s: panic: Invalid l_value %d\n"),
1324 progname, lp->l_value);
1325 exit(EXIT_FAILURE);
1326 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1327 error(_("invalid starting year"));
1328 return;
1329 }
1330 cp = hiyearp;
1331 lp = byword(cp, end_years);
1332 rp->r_hiwasnum = lp == NULL;
1333 if (!rp->r_hiwasnum) switch ((int) lp->l_value) {
1334 case YR_MINIMUM:
1335 rp->r_hiyear = INT_MIN;
1336 break;
1337 case YR_MAXIMUM:
1338 rp->r_hiyear = INT_MAX;
1339 break;
1340 case YR_ONLY:
1341 rp->r_hiyear = rp->r_loyear;
1342 break;
1343 default: /* "cannot happen" */
1344 (void) fprintf(stderr,
1345 _("%s: panic: Invalid l_value %d\n"),
1346 progname, lp->l_value);
1347 exit(EXIT_FAILURE);
1348 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1349 error(_("invalid ending year"));
1350 return;
1351 }
1352 if (rp->r_loyear > rp->r_hiyear) {
1353 error(_("starting year greater than ending year"));
1354 return;
1355 }
1356 if (*typep == '\0')
1357 rp->r_yrtype = NULL;
1358 else {
1359 if (rp->r_loyear == rp->r_hiyear) {
1360 error(_("typed single year"));
1361 return;
1362 }
1363 rp->r_yrtype = ecpyalloc(typep);
1364 }
1365 /*
1366 ** Day work.
1367 ** Accept things such as:
1368 ** 1
1369 ** last-Sunday
1370 ** Sun<=20
1371 ** Sun>=7
1372 */
1373 dp = ecpyalloc(dayp);
1374 if ((lp = byword(dp, lasts)) != NULL) {
1375 rp->r_dycode = DC_DOWLEQ;
1376 rp->r_wday = lp->l_value;
1377 rp->r_dayofmonth = len_months[1][rp->r_month];
1378 } else {
1379 if ((ep = strchr(dp, '<')) != 0)
1380 rp->r_dycode = DC_DOWLEQ;
1381 else if ((ep = strchr(dp, '>')) != 0)
1382 rp->r_dycode = DC_DOWGEQ;
1383 else {
1384 ep = dp;
1385 rp->r_dycode = DC_DOM;
1386 }
1387 if (rp->r_dycode != DC_DOM) {
1388 *ep++ = 0;
1389 if (*ep++ != '=') {
1390 error(_("invalid day of month"));
1391 ifree(dp);
1392 return;
1393 }
1394 if ((lp = byword(dp, wday_names)) == NULL) {
1395 error(_("invalid weekday name"));
1396 ifree(dp);
1397 return;
1398 }
1399 rp->r_wday = lp->l_value;
1400 }
1401 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1402 rp->r_dayofmonth <= 0 ||
1403 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1404 error(_("invalid day of month"));
1405 ifree(dp);
1406 return;
1407 }
1408 }
1409 ifree(dp);
1410 }
1411
1412 static void
1413 convert(val, buf)
1414 const long val;
1415 char * const buf;
1416 {
1417 register int i;
1418 register int shift;
1419
1420 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1421 buf[i] = val >> shift;
1422 }
1423
1424 static void
1425 convert64(val, buf)
1426 const zic_t val;
1427 char * const buf;
1428 {
1429 register int i;
1430 register int shift;
1431
1432 for (i = 0, shift = 56; i < 8; ++i, shift -= 8)
1433 buf[i] = val >> shift;
1434 }
1435
1436 static void
1437 puttzcode(val, fp)
1438 const long val;
1439 FILE * const fp;
1440 {
1441 char buf[4];
1442
1443 convert(val, buf);
1444 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1445 }
1446
1447 static void
1448 puttzcode64(val, fp)
1449 const zic_t val;
1450 FILE * const fp;
1451 {
1452 char buf[8];
1453
1454 convert64(val, buf);
1455 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1456 }
1457
1458 static int
1459 atcomp(avp, bvp)
1460 const void * avp;
1461 const void * bvp;
1462 {
1463 const zic_t a = ((const struct attype *) avp)->at;
1464 const zic_t b = ((const struct attype *) bvp)->at;
1465
1466 return (a < b) ? -1 : (a > b);
1467 }
1468
1469 static int
1470 is32(x)
1471 const zic_t x;
1472 {
1473 return INT32_MIN <= x && x <= INT32_MAX;
1474 }
1475
1476 static void
1477 writezone(name, string)
1478 const char * const name;
1479 const char * const string;
1480 {
1481 register FILE * fp;
1482 register int i, j;
1483 register int leapcnt32, leapi32;
1484 register int timecnt32, timei32;
1485 register int pass;
1486 static char * fullname;
1487 static const struct tzhead tzh0;
1488 static struct tzhead tzh;
1489 zic_t ats[TZ_MAX_TIMES];
1490 unsigned char types[TZ_MAX_TIMES];
1491
1492 /*
1493 ** Sort.
1494 */
1495 if (timecnt > 1)
1496 (void) qsort((void *) attypes, (size_t) timecnt,
1497 (size_t) sizeof *attypes, atcomp);
1498 /*
1499 ** Optimize.
1500 */
1501 {
1502 int fromi;
1503 int toi;
1504
1505 toi = 0;
1506 fromi = 0;
1507 while (fromi < timecnt && attypes[fromi].at < min_time)
1508 ++fromi;
1509 if (isdsts[0] == 0)
1510 while (fromi < timecnt && attypes[fromi].type == 0)
1511 ++fromi; /* handled by default rule */
1512 for ( ; fromi < timecnt; ++fromi) {
1513 if (toi != 0 && ((attypes[fromi].at +
1514 gmtoffs[attypes[toi - 1].type]) <=
1515 (attypes[toi - 1].at + gmtoffs[toi == 1 ? 0
1516 : attypes[toi - 2].type]))) {
1517 attypes[toi - 1].type =
1518 attypes[fromi].type;
1519 continue;
1520 }
1521 if (toi == 0 ||
1522 attypes[toi - 1].type != attypes[fromi].type)
1523 attypes[toi++] = attypes[fromi];
1524 }
1525 timecnt = toi;
1526 }
1527 /*
1528 ** Transfer.
1529 */
1530 for (i = 0; i < timecnt; ++i) {
1531 ats[i] = attypes[i].at;
1532 types[i] = attypes[i].type;
1533 }
1534 /*
1535 ** Correct for leap seconds.
1536 */
1537 for (i = 0; i < timecnt; ++i) {
1538 j = leapcnt;
1539 while (--j >= 0)
1540 if (ats[i] > trans[j] - corr[j]) {
1541 ats[i] = tadd(ats[i], corr[j]);
1542 break;
1543 }
1544 }
1545 /*
1546 ** Figure out 32-bit-limited starts and counts.
1547 */
1548 timecnt32 = timecnt;
1549 timei32 = 0;
1550 leapcnt32 = leapcnt;
1551 leapi32 = 0;
1552 while (timecnt32 > 0 && !is32(ats[timecnt32 - 1]))
1553 --timecnt32;
1554 while (timecnt32 > 0 && !is32(ats[timei32])) {
1555 --timecnt32;
1556 ++timei32;
1557 }
1558 while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1]))
1559 --leapcnt32;
1560 while (leapcnt32 > 0 && !is32(trans[leapi32])) {
1561 --leapcnt32;
1562 ++leapi32;
1563 }
1564 fullname = erealloc(fullname,
1565 (int) (strlen(directory) + 1 + strlen(name) + 1));
1566 (void) sprintf(fullname, "%s/%s", directory, name);
1567 /*
1568 ** Remove old file, if any, to snap links.
1569 */
1570 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) {
1571 const char *e = strerror(errno);
1572
1573 (void) fprintf(stderr, _("%s: Can't remove %s: %s\n"),
1574 progname, fullname, e);
1575 exit(EXIT_FAILURE);
1576 }
1577 if ((fp = fopen(fullname, "wb")) == NULL) {
1578 if (mkdirs(fullname) != 0)
1579 exit(EXIT_FAILURE);
1580 if ((fp = fopen(fullname, "wb")) == NULL) {
1581 const char *e = strerror(errno);
1582
1583 (void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
1584 progname, fullname, e);
1585 exit(EXIT_FAILURE);
1586 }
1587 }
1588 for (pass = 1; pass <= 2; ++pass) {
1589 register int thistimei, thistimecnt;
1590 register int thisleapi, thisleapcnt;
1591 register int thistimelim, thisleaplim;
1592 int writetype[TZ_MAX_TIMES];
1593 int typemap[TZ_MAX_TYPES];
1594 register int thistypecnt;
1595 char thischars[TZ_MAX_CHARS];
1596 char thischarcnt;
1597 int indmap[TZ_MAX_CHARS];
1598
1599 if (pass == 1) {
1600 thistimei = timei32;
1601 thistimecnt = timecnt32;
1602 thisleapi = leapi32;
1603 thisleapcnt = leapcnt32;
1604 } else {
1605 thistimei = 0;
1606 thistimecnt = timecnt;
1607 thisleapi = 0;
1608 thisleapcnt = leapcnt;
1609 }
1610 thistimelim = thistimei + thistimecnt;
1611 thisleaplim = thisleapi + thisleapcnt;
1612 for (i = 0; i < typecnt; ++i)
1613 writetype[i] = thistimecnt == timecnt;
1614 if (thistimecnt == 0) {
1615 /*
1616 ** No transition times fall in the current
1617 ** (32- or 64-bit) window.
1618 */
1619 if (typecnt != 0)
1620 writetype[typecnt - 1] = TRUE;
1621 } else {
1622 for (i = thistimei - 1; i < thistimelim; ++i)
1623 if (i >= 0)
1624 writetype[types[i]] = TRUE;
1625 /*
1626 ** For America/Godthab and Antarctica/Palmer
1627 */
1628 if (thistimei == 0)
1629 writetype[0] = TRUE;
1630 }
1631 thistypecnt = 0;
1632 for (i = 0; i < typecnt; ++i)
1633 typemap[i] = writetype[i] ? thistypecnt++ : -1;
1634 for (i = 0; i < sizeof indmap / sizeof indmap[0]; ++i)
1635 indmap[i] = -1;
1636 thischarcnt = 0;
1637 for (i = 0; i < typecnt; ++i) {
1638 register char * thisabbr;
1639
1640 if (!writetype[i])
1641 continue;
1642 if (indmap[abbrinds[i]] >= 0)
1643 continue;
1644 thisabbr = &chars[abbrinds[i]];
1645 for (j = 0; j < thischarcnt; ++j)
1646 if (strcmp(&thischars[j], thisabbr) == 0)
1647 break;
1648 if (j == thischarcnt) {
1649 (void) strcpy(&thischars[(int) thischarcnt],
1650 thisabbr);
1651 thischarcnt += strlen(thisabbr) + 1;
1652 }
1653 indmap[abbrinds[i]] = j;
1654 }
1655 #define DO(field) (void) fwrite((void *) tzh.field, \
1656 (size_t) sizeof tzh.field, (size_t) 1, fp)
1657 tzh = tzh0;
1658 (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
1659 tzh.tzh_version[0] = ZIC_VERSION;
1660 convert(eitol(thistypecnt), tzh.tzh_ttisgmtcnt);
1661 convert(eitol(thistypecnt), tzh.tzh_ttisstdcnt);
1662 convert(eitol(thisleapcnt), tzh.tzh_leapcnt);
1663 convert(eitol(thistimecnt), tzh.tzh_timecnt);
1664 convert(eitol(thistypecnt), tzh.tzh_typecnt);
1665 convert(eitol(thischarcnt), tzh.tzh_charcnt);
1666 DO(tzh_magic);
1667 DO(tzh_version);
1668 DO(tzh_reserved);
1669 DO(tzh_ttisgmtcnt);
1670 DO(tzh_ttisstdcnt);
1671 DO(tzh_leapcnt);
1672 DO(tzh_timecnt);
1673 DO(tzh_typecnt);
1674 DO(tzh_charcnt);
1675 #undef DO
1676 for (i = thistimei; i < thistimelim; ++i)
1677 if (pass == 1)
1678 puttzcode((long) ats[i], fp);
1679 else puttzcode64(ats[i], fp);
1680 for (i = thistimei; i < thistimelim; ++i) {
1681 unsigned char uc;
1682
1683 uc = typemap[types[i]];
1684 (void) fwrite((void *) &uc,
1685 (size_t) sizeof uc,
1686 (size_t) 1,
1687 fp);
1688 }
1689 for (i = 0; i < typecnt; ++i)
1690 if (writetype[i]) {
1691 puttzcode(gmtoffs[i], fp);
1692 (void) putc(isdsts[i], fp);
1693 (void) putc((unsigned char) indmap[abbrinds[i]], fp);
1694 }
1695 if (thischarcnt != 0)
1696 (void) fwrite((void *) thischars,
1697 (size_t) sizeof thischars[0],
1698 (size_t) thischarcnt, fp);
1699 for (i = thisleapi; i < thisleaplim; ++i) {
1700 register zic_t todo;
1701
1702 if (roll[i]) {
1703 if (timecnt == 0 || trans[i] < ats[0]) {
1704 j = 0;
1705 while (isdsts[j])
1706 if (++j >= typecnt) {
1707 j = 0;
1708 break;
1709 }
1710 } else {
1711 j = 1;
1712 while (j < timecnt &&
1713 trans[i] >= ats[j])
1714 ++j;
1715 j = types[j - 1];
1716 }
1717 todo = tadd(trans[i], -gmtoffs[j]);
1718 } else todo = trans[i];
1719 if (pass == 1)
1720 puttzcode((long) todo, fp);
1721 else puttzcode64(todo, fp);
1722 puttzcode(corr[i], fp);
1723 }
1724 for (i = 0; i < typecnt; ++i)
1725 if (writetype[i])
1726 (void) putc(ttisstds[i], fp);
1727 for (i = 0; i < typecnt; ++i)
1728 if (writetype[i])
1729 (void) putc(ttisgmts[i], fp);
1730 }
1731 (void) fprintf(fp, "\n%s\n", string);
1732 if (ferror(fp) || fclose(fp)) {
1733 (void) fprintf(stderr, _("%s: Error writing %s\n"),
1734 progname, fullname);
1735 exit(EXIT_FAILURE);
1736 }
1737 }
1738
1739 static void
1740 doabbr(abbr, format, letters, isdst, doquotes)
1741 char * const abbr;
1742 const char * const format;
1743 const char * const letters;
1744 const int isdst;
1745 const int doquotes;
1746 {
1747 register char * cp;
1748 register char * slashp;
1749 register int len;
1750
1751 slashp = strchr(format, '/');
1752 if (slashp == NULL) {
1753 if (letters == NULL)
1754 (void) strcpy(abbr, format);
1755 else (void) sprintf(abbr, format, letters);
1756 } else if (isdst) {
1757 (void) strcpy(abbr, slashp + 1);
1758 } else {
1759 if (slashp > format)
1760 (void) strncpy(abbr, format,
1761 (unsigned) (slashp - format));
1762 abbr[slashp - format] = '\0';
1763 }
1764 if (!doquotes)
1765 return;
1766 for (cp = abbr; *cp != '\0'; ++cp)
1767 if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ", *cp) == NULL &&
1768 strchr("abcdefghijklmnopqrstuvwxyz", *cp) == NULL)
1769 break;
1770 len = strlen(abbr);
1771 if (len > 0 && *cp == '\0')
1772 return;
1773 abbr[len + 2] = '\0';
1774 abbr[len + 1] = '>';
1775 for ( ; len > 0; --len)
1776 abbr[len] = abbr[len - 1];
1777 abbr[0] = '<';
1778 }
1779
1780 static void
1781 updateminmax(x)
1782 const int x;
1783 {
1784 if (min_year > x)
1785 min_year = x;
1786 if (max_year < x)
1787 max_year = x;
1788 }
1789
1790 static int
1791 stringoffset(result, offset)
1792 char * result;
1793 long offset;
1794 {
1795 register int hours;
1796 register int minutes;
1797 register int seconds;
1798
1799 result[0] = '\0';
1800 if (offset < 0) {
1801 (void) strcpy(result, "-");
1802 offset = -offset;
1803 }
1804 seconds = offset % SECSPERMIN;
1805 offset /= SECSPERMIN;
1806 minutes = offset % MINSPERHOUR;
1807 offset /= MINSPERHOUR;
1808 hours = offset;
1809 if (hours >= HOURSPERDAY) {
1810 result[0] = '\0';
1811 return -1;
1812 }
1813 (void) sprintf(end(result), "%d", hours);
1814 if (minutes != 0 || seconds != 0) {
1815 (void) sprintf(end(result), ":%02d", minutes);
1816 if (seconds != 0)
1817 (void) sprintf(end(result), ":%02d", seconds);
1818 }
1819 return 0;
1820 }
1821
1822 static int
1823 stringrule(result, rp, dstoff, gmtoff)
1824 char * result;
1825 const struct rule * const rp;
1826 const long dstoff;
1827 const long gmtoff;
1828 {
1829 register long tod;
1830
1831 result = end(result);
1832 if (rp->r_dycode == DC_DOM) {
1833 register int month, total;
1834
1835 if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY)
1836 return -1;
1837 total = 0;
1838 for (month = 0; month < rp->r_month; ++month)
1839 total += len_months[0][month];
1840 (void) sprintf(result, "J%d", total + rp->r_dayofmonth);
1841 } else {
1842 register int week;
1843
1844 if (rp->r_dycode == DC_DOWGEQ) {
1845 week = 1 + rp->r_dayofmonth / DAYSPERWEEK;
1846 if ((week - 1) * DAYSPERWEEK + 1 != rp->r_dayofmonth)
1847 return -1;
1848 } else if (rp->r_dycode == DC_DOWLEQ) {
1849 if (rp->r_dayofmonth == len_months[1][rp->r_month])
1850 week = 5;
1851 else {
1852 week = 1 + rp->r_dayofmonth / DAYSPERWEEK;
1853 if (week * DAYSPERWEEK - 1 != rp->r_dayofmonth)
1854 return -1;
1855 }
1856 } else return -1; /* "cannot happen" */
1857 (void) sprintf(result, "M%d.%d.%d",
1858 rp->r_month + 1, week, rp->r_wday);
1859 }
1860 tod = rp->r_tod;
1861 if (rp->r_todisgmt)
1862 tod += gmtoff;
1863 if (rp->r_todisstd && rp->r_stdoff == 0)
1864 tod += dstoff;
1865 if (tod < 0) {
1866 result[0] = '\0';
1867 return -1;
1868 }
1869 if (tod != 2 * SECSPERMIN * MINSPERHOUR) {
1870 (void) strcat(result, "/");
1871 if (stringoffset(end(result), tod) != 0)
1872 return -1;
1873 }
1874 return 0;
1875 }
1876
1877 static void
1878 stringzone(result, zpfirst, zonecount)
1879 char * result;
1880 const struct zone * const zpfirst;
1881 const int zonecount;
1882 {
1883 register const struct zone * zp;
1884 register struct rule * rp;
1885 register struct rule * stdrp;
1886 register struct rule * dstrp;
1887 register int i;
1888 register const char * abbrvar;
1889
1890 result[0] = '\0';
1891 zp = zpfirst + zonecount - 1;
1892 stdrp = dstrp = NULL;
1893 for (i = 0; i < zp->z_nrules; ++i) {
1894 rp = &zp->z_rules[i];
1895 if (rp->r_hiwasnum || rp->r_hiyear != INT_MAX)
1896 continue;
1897 if (rp->r_yrtype != NULL)
1898 continue;
1899 if (rp->r_stdoff == 0) {
1900 if (stdrp == NULL)
1901 stdrp = rp;
1902 else return;
1903 } else {
1904 if (dstrp == NULL)
1905 dstrp = rp;
1906 else return;
1907 }
1908 }
1909 if (stdrp == NULL && dstrp == NULL) {
1910 /*
1911 ** There are no rules running through "max".
1912 ** Let's find the latest rule.
1913 */
1914 for (i = 0; i < zp->z_nrules; ++i) {
1915 rp = &zp->z_rules[i];
1916 if (stdrp == NULL || rp->r_hiyear > stdrp->r_hiyear ||
1917 (rp->r_hiyear == stdrp->r_hiyear &&
1918 rp->r_month > stdrp->r_month))
1919 stdrp = rp;
1920 }
1921 if (stdrp != NULL && stdrp->r_stdoff != 0)
1922 return; /* We end up in DST (a POSIX no-no). */
1923 /*
1924 ** Horrid special case: if year is 2037,
1925 ** presume this is a zone handled on a year-by-year basis;
1926 ** do not try to apply a rule to the zone.
1927 */
1928 if (stdrp != NULL && stdrp->r_hiyear == 2037)
1929 return;
1930 }
1931 if (stdrp == NULL && zp->z_nrules != 0)
1932 return;
1933 abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar;
1934 doabbr(result, zp->z_format, abbrvar, FALSE, TRUE);
1935 if (stringoffset(end(result), -zp->z_gmtoff) != 0) {
1936 result[0] = '\0';
1937 return;
1938 }
1939 if (dstrp == NULL)
1940 return;
1941 doabbr(end(result), zp->z_format, dstrp->r_abbrvar, TRUE, TRUE);
1942 if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR)
1943 if (stringoffset(end(result),
1944 -(zp->z_gmtoff + dstrp->r_stdoff)) != 0) {
1945 result[0] = '\0';
1946 return;
1947 }
1948 (void) strcat(result, ",");
1949 if (stringrule(result, dstrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
1950 result[0] = '\0';
1951 return;
1952 }
1953 (void) strcat(result, ",");
1954 if (stringrule(result, stdrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
1955 result[0] = '\0';
1956 return;
1957 }
1958 }
1959
1960 static void
1961 outzone(zpfirst, zonecount)
1962 const struct zone * const zpfirst;
1963 const int zonecount;
1964 {
1965 register const struct zone * zp;
1966 register struct rule * rp;
1967 register int i, j;
1968 register int usestart, useuntil;
1969 register zic_t starttime, untiltime;
1970 register long gmtoff;
1971 register long stdoff;
1972 register int year;
1973 register long startoff;
1974 register int startttisstd;
1975 register int startttisgmt;
1976 register int type;
1977 register char * startbuf;
1978 register char * ab;
1979 register char * envvar;
1980 register int max_abbr_len;
1981 register int max_envvar_len;
1982
1983 max_abbr_len = 2 + max_format_len + max_abbrvar_len;
1984 max_envvar_len = 2 * max_abbr_len + 5 * 9;
1985 startbuf = emalloc(max_abbr_len + 1);
1986 ab = emalloc(max_abbr_len + 1);
1987 envvar = emalloc(max_envvar_len + 1);
1988 INITIALIZE(untiltime);
1989 INITIALIZE(starttime);
1990 /*
1991 ** Now. . .finally. . .generate some useful data!
1992 */
1993 timecnt = 0;
1994 typecnt = 0;
1995 charcnt = 0;
1996 /*
1997 ** Thanks to Earl Chew
1998 ** for noting the need to unconditionally initialize startttisstd.
1999 */
2000 startttisstd = FALSE;
2001 startttisgmt = FALSE;
2002 min_year = max_year = EPOCH_YEAR;
2003 if (leapseen) {
2004 updateminmax(leapminyear);
2005 updateminmax(leapmaxyear);
2006 }
2007 for (i = 0; i < zonecount; ++i) {
2008 zp = &zpfirst[i];
2009 updateminmax(zp->z_untilrule.r_loyear);
2010 for (j = 0; j < zp->z_nrules; ++j) {
2011 rp = &zp->z_rules[j];
2012 if (rp->r_lowasnum)
2013 updateminmax(rp->r_loyear);
2014 if (rp->r_hiwasnum)
2015 updateminmax(rp->r_hiyear);
2016 }
2017 }
2018 /*
2019 ** Generate lots of data if a rule can't cover all future times.
2020 */
2021 stringzone(envvar, zpfirst, zonecount);
2022 if (noise && envvar[0] == '\0') {
2023 register char * wp;
2024
2025 wp = ecpyalloc(_("no POSIX environment variable for zone"));
2026 wp = ecatalloc(wp, " ");
2027 wp = ecatalloc(wp, zpfirst->z_name);
2028 warning(wp);
2029 ifree(wp);
2030 }
2031 if (envvar[0] == '\0') {
2032 if (min_year >= INT_MIN + YEARSPERREPEAT)
2033 min_year -= YEARSPERREPEAT;
2034 else min_year = INT_MIN;
2035 if (max_year <= INT_MAX - YEARSPERREPEAT)
2036 max_year += YEARSPERREPEAT;
2037 else max_year = INT_MAX;
2038 }
2039 /*
2040 ** For the benefit of older systems, generate data through 2037.
2041 */
2042 if (max_year < 2037)
2043 max_year = 2037;
2044 for (i = 0; i < zonecount; ++i) {
2045 /*
2046 ** A guess that may well be corrected later.
2047 */
2048 stdoff = 0;
2049 zp = &zpfirst[i];
2050 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
2051 useuntil = i < (zonecount - 1);
2052 if (useuntil && zp->z_untiltime <= min_time)
2053 continue;
2054 gmtoff = zp->z_gmtoff;
2055 eat(zp->z_filename, zp->z_linenum);
2056 *startbuf = '\0';
2057 startoff = zp->z_gmtoff;
2058 if (zp->z_nrules == 0) {
2059 stdoff = zp->z_stdoff;
2060 doabbr(startbuf, zp->z_format,
2061 (char *) NULL, stdoff != 0, FALSE);
2062 type = addtype(oadd(zp->z_gmtoff, stdoff),
2063 startbuf, stdoff != 0, startttisstd,
2064 startttisgmt);
2065 if (usestart) {
2066 addtt(starttime, type);
2067 usestart = FALSE;
2068 } else if (stdoff != 0)
2069 addtt(min_time, type);
2070 } else for (year = min_year; year <= max_year; ++year) {
2071 if (useuntil && year > zp->z_untilrule.r_hiyear)
2072 break;
2073 /*
2074 ** Mark which rules to do in the current year.
2075 ** For those to do, calculate rpytime(rp, year);
2076 */
2077 for (j = 0; j < zp->z_nrules; ++j) {
2078 rp = &zp->z_rules[j];
2079 eats(zp->z_filename, zp->z_linenum,
2080 rp->r_filename, rp->r_linenum);
2081 rp->r_todo = year >= rp->r_loyear &&
2082 year <= rp->r_hiyear &&
2083 yearistype(year, rp->r_yrtype);
2084 if (rp->r_todo)
2085 rp->r_temp = rpytime(rp, year);
2086 }
2087 for ( ; ; ) {
2088 register int k;
2089 register zic_t jtime, ktime;
2090 register long offset;
2091
2092 INITIALIZE(ktime);
2093 if (useuntil) {
2094 /*
2095 ** Turn untiltime into UTC
2096 ** assuming the current gmtoff and
2097 ** stdoff values.
2098 */
2099 untiltime = zp->z_untiltime;
2100 if (!zp->z_untilrule.r_todisgmt)
2101 untiltime = tadd(untiltime,
2102 -gmtoff);
2103 if (!zp->z_untilrule.r_todisstd)
2104 untiltime = tadd(untiltime,
2105 -stdoff);
2106 }
2107 /*
2108 ** Find the rule (of those to do, if any)
2109 ** that takes effect earliest in the year.
2110 */
2111 k = -1;
2112 for (j = 0; j < zp->z_nrules; ++j) {
2113 rp = &zp->z_rules[j];
2114 if (!rp->r_todo)
2115 continue;
2116 eats(zp->z_filename, zp->z_linenum,
2117 rp->r_filename, rp->r_linenum);
2118 offset = rp->r_todisgmt ? 0 : gmtoff;
2119 if (!rp->r_todisstd)
2120 offset = oadd(offset, stdoff);
2121 jtime = rp->r_temp;
2122 if (jtime == min_time ||
2123 jtime == max_time)
2124 continue;
2125 jtime = tadd(jtime, -offset);
2126 if (k < 0 || jtime < ktime) {
2127 k = j;
2128 ktime = jtime;
2129 }
2130 }
2131 if (k < 0)
2132 break; /* go on to next year */
2133 rp = &zp->z_rules[k];
2134 rp->r_todo = FALSE;
2135 if (useuntil && ktime >= untiltime)
2136 break;
2137 stdoff = rp->r_stdoff;
2138 if (usestart && ktime == starttime)
2139 usestart = FALSE;
2140 if (usestart) {
2141 if (ktime < starttime) {
2142 startoff = oadd(zp->z_gmtoff,
2143 stdoff);
2144 doabbr(startbuf, zp->z_format,
2145 rp->r_abbrvar,
2146 rp->r_stdoff != 0,
2147 FALSE);
2148 continue;
2149 }
2150 if (*startbuf == '\0' &&
2151 startoff == oadd(zp->z_gmtoff,
2152 stdoff)) {
2153 doabbr(startbuf,
2154 zp->z_format,
2155 rp->r_abbrvar,
2156 rp->r_stdoff !=
2157 0,
2158 FALSE);
2159 }
2160 }
2161 eats(zp->z_filename, zp->z_linenum,
2162 rp->r_filename, rp->r_linenum);
2163 doabbr(ab, zp->z_format, rp->r_abbrvar,
2164 rp->r_stdoff != 0, FALSE);
2165 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
2166 type = addtype(offset, ab, rp->r_stdoff != 0,
2167 rp->r_todisstd, rp->r_todisgmt);
2168 addtt(ktime, type);
2169 }
2170 }
2171 if (usestart) {
2172 if (*startbuf == '\0' &&
2173 zp->z_format != NULL &&
2174 strchr(zp->z_format, '%') == NULL &&
2175 strchr(zp->z_format, '/') == NULL)
2176 (void) strcpy(startbuf, zp->z_format);
2177 eat(zp->z_filename, zp->z_linenum);
2178 if (*startbuf == '\0')
2179 error(_("can't determine time zone abbreviation to use just after until time"));
2180 else addtt(starttime,
2181 addtype(startoff, startbuf,
2182 startoff != zp->z_gmtoff,
2183 startttisstd,
2184 startttisgmt));
2185 }
2186 /*
2187 ** Now we may get to set starttime for the next zone line.
2188 */
2189 if (useuntil) {
2190 startttisstd = zp->z_untilrule.r_todisstd;
2191 startttisgmt = zp->z_untilrule.r_todisgmt;
2192 starttime = zp->z_untiltime;
2193 if (!startttisstd)
2194 starttime = tadd(starttime, -stdoff);
2195 if (!startttisgmt)
2196 starttime = tadd(starttime, -gmtoff);
2197 }
2198 }
2199 writezone(zpfirst->z_name, envvar);
2200 ifree(startbuf);
2201 ifree(ab);
2202 ifree(envvar);
2203 }
2204
2205 static void
2206 addtt(starttime, type)
2207 const zic_t starttime;
2208 int type;
2209 {
2210 if (starttime <= min_time ||
2211 (timecnt == 1 && attypes[0].at < min_time)) {
2212 gmtoffs[0] = gmtoffs[type];
2213 isdsts[0] = isdsts[type];
2214 ttisstds[0] = ttisstds[type];
2215 ttisgmts[0] = ttisgmts[type];
2216 if (abbrinds[type] != 0)
2217 (void) strcpy(chars, &chars[abbrinds[type]]);
2218 abbrinds[0] = 0;
2219 charcnt = strlen(chars) + 1;
2220 typecnt = 1;
2221 timecnt = 0;
2222 type = 0;
2223 }
2224 if (timecnt >= TZ_MAX_TIMES) {
2225 error(_("too many transitions?!"));
2226 exit(EXIT_FAILURE);
2227 }
2228 attypes[timecnt].at = starttime;
2229 attypes[timecnt].type = type;
2230 ++timecnt;
2231 }
2232
2233 static int
2234 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
2235 const long gmtoff;
2236 const char * const abbr;
2237 const int isdst;
2238 const int ttisstd;
2239 const int ttisgmt;
2240 {
2241 register int i, j;
2242
2243 if (isdst != TRUE && isdst != FALSE) {
2244 error(_("internal error - addtype called with bad isdst"));
2245 exit(EXIT_FAILURE);
2246 }
2247 if (ttisstd != TRUE && ttisstd != FALSE) {
2248 error(_("internal error - addtype called with bad ttisstd"));
2249 exit(EXIT_FAILURE);
2250 }
2251 if (ttisgmt != TRUE && ttisgmt != FALSE) {
2252 error(_("internal error - addtype called with bad ttisgmt"));
2253 exit(EXIT_FAILURE);
2254 }
2255 /*
2256 ** See if there's already an entry for this zone type.
2257 ** If so, just return its index.
2258 */
2259 for (i = 0; i < typecnt; ++i) {
2260 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
2261 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
2262 ttisstd == ttisstds[i] &&
2263 ttisgmt == ttisgmts[i])
2264 return i;
2265 }
2266 /*
2267 ** There isn't one; add a new one, unless there are already too
2268 ** many.
2269 */
2270 if (typecnt >= TZ_MAX_TYPES) {
2271 error(_("too many local time types"));
2272 exit(EXIT_FAILURE);
2273 }
2274 gmtoffs[i] = gmtoff;
2275 isdsts[i] = isdst;
2276 ttisstds[i] = ttisstd;
2277 ttisgmts[i] = ttisgmt;
2278
2279 for (j = 0; j < charcnt; ++j)
2280 if (strcmp(&chars[j], abbr) == 0)
2281 break;
2282 if (j == charcnt)
2283 newabbr(abbr);
2284 abbrinds[i] = j;
2285 ++typecnt;
2286 return i;
2287 }
2288
2289 static void
2290 leapadd(t, positive, rolling, count)
2291 const zic_t t;
2292 const int positive;
2293 const int rolling;
2294 int count;
2295 {
2296 register int i, j;
2297
2298 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
2299 error(_("too many leap seconds"));
2300 exit(EXIT_FAILURE);
2301 }
2302 for (i = 0; i < leapcnt; ++i)
2303 if (t <= trans[i]) {
2304 if (t == trans[i]) {
2305 error(_("repeated leap second moment"));
2306 exit(EXIT_FAILURE);
2307 }
2308 break;
2309 }
2310 do {
2311 for (j = leapcnt; j > i; --j) {
2312 trans[j] = trans[j - 1];
2313 corr[j] = corr[j - 1];
2314 roll[j] = roll[j - 1];
2315 }
2316 trans[i] = t;
2317 corr[i] = positive ? 1L : eitol(-count);
2318 roll[i] = rolling;
2319 ++leapcnt;
2320 } while (positive && --count != 0);
2321 }
2322
2323 static void
2324 adjleap P((void))
2325 {
2326 register int i;
2327 register long last = 0;
2328
2329 /*
2330 ** propagate leap seconds forward
2331 */
2332 for (i = 0; i < leapcnt; ++i) {
2333 trans[i] = tadd(trans[i], last);
2334 last = corr[i] += last;
2335 }
2336 }
2337
2338 static int
2339 yearistype(year, type)
2340 const int year;
2341 const char * const type;
2342 {
2343 static char * buf;
2344 int result;
2345
2346 if (type == NULL || *type == '\0')
2347 return TRUE;
2348 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
2349 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
2350 result = system(buf);
2351 if (WIFEXITED(result)) switch (WEXITSTATUS(result)) {
2352 case 0:
2353 return TRUE;
2354 case 1:
2355 return FALSE;
2356 }
2357 error(_("Wild result from command execution"));
2358 (void) fprintf(stderr, _("%s: command was '%s', result was %d\n"),
2359 progname, buf, result);
2360 for ( ; ; )
2361 exit(EXIT_FAILURE);
2362 }
2363
2364 static int
2365 lowerit(a)
2366 int a;
2367 {
2368 a = (unsigned char) a;
2369 return (isascii(a) && isupper(a)) ? tolower(a) : a;
2370 }
2371
2372 static int
2373 ciequal(ap, bp) /* case-insensitive equality */
2374 register const char * ap;
2375 register const char * bp;
2376 {
2377 while (lowerit(*ap) == lowerit(*bp++))
2378 if (*ap++ == '\0')
2379 return TRUE;
2380 return FALSE;
2381 }
2382
2383 static int
2384 itsabbr(abbr, word)
2385 register const char * abbr;
2386 register const char * word;
2387 {
2388 if (lowerit(*abbr) != lowerit(*word))
2389 return FALSE;
2390 ++word;
2391 while (*++abbr != '\0')
2392 do {
2393 if (*word == '\0')
2394 return FALSE;
2395 } while (lowerit(*word++) != lowerit(*abbr));
2396 return TRUE;
2397 }
2398
2399 static const struct lookup *
2400 byword(word, table)
2401 register const char * const word;
2402 register const struct lookup * const table;
2403 {
2404 register const struct lookup * foundlp;
2405 register const struct lookup * lp;
2406
2407 if (word == NULL || table == NULL)
2408 return NULL;
2409 /*
2410 ** Look for exact match.
2411 */
2412 for (lp = table; lp->l_word != NULL; ++lp)
2413 if (ciequal(word, lp->l_word))
2414 return lp;
2415 /*
2416 ** Look for inexact match.
2417 */
2418 foundlp = NULL;
2419 for (lp = table; lp->l_word != NULL; ++lp)
2420 if (itsabbr(word, lp->l_word)) {
2421 if (foundlp == NULL)
2422 foundlp = lp;
2423 else return NULL; /* multiple inexact matches */
2424 }
2425 return foundlp;
2426 }
2427
2428 static char **
2429 getfields(cp)
2430 register char * cp;
2431 {
2432 register char * dp;
2433 register char ** array;
2434 register int nsubs;
2435
2436 if (cp == NULL)
2437 return NULL;
2438 array = (char **) (void *)
2439 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
2440 nsubs = 0;
2441 for ( ; ; ) {
2442 while (isascii((unsigned char) *cp) &&
2443 isspace((unsigned char) *cp))
2444 ++cp;
2445 if (*cp == '\0' || *cp == '#')
2446 break;
2447 array[nsubs++] = dp = cp;
2448 do {
2449 if ((*dp = *cp++) != '"')
2450 ++dp;
2451 else while ((*dp = *cp++) != '"')
2452 if (*dp != '\0')
2453 ++dp;
2454 else error(_(
2455 "Odd number of quotation marks"
2456 ));
2457 } while (*cp != '\0' && *cp != '#' &&
2458 (!isascii(*cp) || !isspace((unsigned char) *cp)));
2459 if (isascii(*cp) && isspace((unsigned char) *cp))
2460 ++cp;
2461 *dp = '\0';
2462 }
2463 array[nsubs] = NULL;
2464 return array;
2465 }
2466
2467 static long
2468 oadd(t1, t2)
2469 const long t1;
2470 const long t2;
2471 {
2472 register long t;
2473
2474 t = t1 + t2;
2475 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2476 error(_("time overflow"));
2477 exit(EXIT_FAILURE);
2478 }
2479 return t;
2480 }
2481
2482 static zic_t
2483 tadd(t1, t2)
2484 const zic_t t1;
2485 const long t2;
2486 {
2487 register zic_t t;
2488
2489 if (t1 == max_time && t2 > 0)
2490 return max_time;
2491 if (t1 == min_time && t2 < 0)
2492 return min_time;
2493 t = t1 + t2;
2494 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2495 error(_("time overflow"));
2496 exit(EXIT_FAILURE);
2497 }
2498 return t;
2499 }
2500
2501 /*
2502 ** Given a rule, and a year, compute the date - in seconds since January 1,
2503 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
2504 */
2505
2506 static zic_t
2507 rpytime(rp, wantedy)
2508 register const struct rule * const rp;
2509 register const int wantedy;
2510 {
2511 register int y, m, i;
2512 register long dayoff; /* with a nod to Margaret O. */
2513 register zic_t t;
2514
2515 if (wantedy == INT_MIN)
2516 return min_time;
2517 if (wantedy == INT_MAX)
2518 return max_time;
2519 dayoff = 0;
2520 m = TM_JANUARY;
2521 y = EPOCH_YEAR;
2522 while (wantedy != y) {
2523 if (wantedy > y) {
2524 i = len_years[isleap(y)];
2525 ++y;
2526 } else {
2527 --y;
2528 i = -len_years[isleap(y)];
2529 }
2530 dayoff = oadd(dayoff, eitol(i));
2531 }
2532 while (m != rp->r_month) {
2533 i = len_months[isleap(y)][m];
2534 dayoff = oadd(dayoff, eitol(i));
2535 ++m;
2536 }
2537 i = rp->r_dayofmonth;
2538 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2539 if (rp->r_dycode == DC_DOWLEQ)
2540 --i;
2541 else {
2542 error(_("use of 2/29 in non leap-year"));
2543 exit(EXIT_FAILURE);
2544 }
2545 }
2546 --i;
2547 dayoff = oadd(dayoff, eitol(i));
2548 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2549 register long wday;
2550
2551 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2552 wday = eitol(EPOCH_WDAY);
2553 /*
2554 ** Don't trust mod of negative numbers.
2555 */
2556 if (dayoff >= 0)
2557 wday = (wday + dayoff) % LDAYSPERWEEK;
2558 else {
2559 wday -= ((-dayoff) % LDAYSPERWEEK);
2560 if (wday < 0)
2561 wday += LDAYSPERWEEK;
2562 }
2563 while (wday != eitol(rp->r_wday))
2564 if (rp->r_dycode == DC_DOWGEQ) {
2565 dayoff = oadd(dayoff, (long) 1);
2566 if (++wday >= LDAYSPERWEEK)
2567 wday = 0;
2568 ++i;
2569 } else {
2570 dayoff = oadd(dayoff, (long) -1);
2571 if (--wday < 0)
2572 wday = LDAYSPERWEEK - 1;
2573 --i;
2574 }
2575 if (i < 0 || i >= len_months[isleap(y)][m]) {
2576 if (noise)
2577 warning(_("rule goes past start/end of month--\
2578 will not work with pre-2004 versions of zic"));
2579 }
2580 }
2581 if (dayoff < min_time / SECSPERDAY)
2582 return min_time;
2583 if (dayoff > max_time / SECSPERDAY)
2584 return max_time;
2585 t = (zic_t) dayoff * SECSPERDAY;
2586 return tadd(t, rp->r_tod);
2587 }
2588
2589 static void
2590 newabbr(string)
2591 const char * const string;
2592 {
2593 register int i;
2594
2595 if (strcmp(string, GRANDPARENTED) != 0) {
2596 register const char * cp;
2597 register char * wp;
2598
2599 /*
2600 ** Want one to ZIC_MAX_ABBR_LEN_WO_WARN alphabetics
2601 ** optionally followed by a + or - and a number from 1 to 14.
2602 */
2603 cp = string;
2604 wp = NULL;
2605 while (isascii((unsigned char) *cp) &&
2606 isalpha((unsigned char) *cp))
2607 ++cp;
2608 if (cp - string == 0)
2609 wp = _("time zone abbreviation lacks alphabetic at start");
2610 if (noise && cp - string > 3)
2611 wp = _("time zone abbreviation has more than 3 alphabetics");
2612 if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN)
2613 wp = _("time zone abbreviation has too many alphabetics");
2614 if (wp == NULL && (*cp == '+' || *cp == '-')) {
2615 ++cp;
2616 if (isascii((unsigned char) *cp) &&
2617 isdigit((unsigned char) *cp))
2618 if (*cp++ == '1' &&
2619 *cp >= '0' && *cp <= '4')
2620 ++cp;
2621 }
2622 if (*cp != '\0')
2623 wp = _("time zone abbreviation differs from POSIX standard");
2624 if (wp != NULL) {
2625 wp = ecpyalloc(wp);
2626 wp = ecatalloc(wp, " (");
2627 wp = ecatalloc(wp, string);
2628 wp = ecatalloc(wp, ")");
2629 warning(wp);
2630 ifree(wp);
2631 }
2632 }
2633 i = strlen(string) + 1;
2634 if (charcnt + i > TZ_MAX_CHARS) {
2635 error(_("too many, or too long, time zone abbreviations"));
2636 exit(EXIT_FAILURE);
2637 }
2638 (void) strcpy(&chars[charcnt], string);
2639 charcnt += eitol(i);
2640 }
2641
2642 static int
2643 mkdirs(argname)
2644 char * const argname;
2645 {
2646 register char * name;
2647 register char * cp;
2648
2649 if (argname == NULL || *argname == '\0')
2650 return 0;
2651 cp = name = ecpyalloc(argname);
2652 while ((cp = strchr(cp + 1, '/')) != 0) {
2653 *cp = '\0';
2654 #ifndef unix
2655 /*
2656 ** DOS drive specifier?
2657 */
2658 if (isalpha((unsigned char) name[0]) &&
2659 name[1] == ':' && name[2] == '\0') {
2660 *cp = '/';
2661 continue;
2662 }
2663 #endif /* !defined unix */
2664 if (!itsdir(name)) {
2665 /*
2666 ** It doesn't seem to exist, so we try to create it.
2667 ** Creation may fail because of the directory being
2668 ** created by some other multiprocessor, so we get
2669 ** to do extra checking.
2670 */
2671 if (mkdir(name, MKDIR_UMASK) != 0) {
2672 const char *e = strerror(errno);
2673
2674 if (errno != EEXIST || !itsdir(name)) {
2675 (void) fprintf(stderr,
2676 _("%s: Can't create directory %s: %s\n"),
2677 progname, name, e);
2678 ifree(name);
2679 return -1;
2680 }
2681 }
2682 }
2683 *cp = '/';
2684 }
2685 ifree(name);
2686 return 0;
2687 }
2688
2689 static long
2690 eitol(i)
2691 const int i;
2692 {
2693 long l;
2694
2695 l = i;
2696 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2697 (void) fprintf(stderr,
2698 _("%s: %d did not sign extend correctly\n"),
2699 progname, i);
2700 exit(EXIT_FAILURE);
2701 }
2702 return l;
2703 }
2704
2705 /*
2706 ** UNIX was a registered trademark of The Open Group in 2003.
2707 */
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