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Updated to fedora-glibc-20071010T2047
[glibc.git] / timezone / zic.c
blob3cb0b171f0e18328c7b633c6ad76f98f9e1a0900
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 8.14";
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 * fromfield, const char * tofield));
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(fromfield, tofield)
632 const char * const fromfield;
633 const char * const tofield;
634 {
635 register char * fromname;
636 register char * toname;
637
638 if (fromfield[0] == '/')
639 fromname = ecpyalloc(fromfield);
640 else {
641 fromname = ecpyalloc(directory);
642 fromname = ecatalloc(fromname, "/");
643 fromname = ecatalloc(fromname, fromfield);
644 }
645 if (tofield[0] == '/')
646 toname = ecpyalloc(tofield);
647 else {
648 toname = ecpyalloc(directory);
649 toname = ecatalloc(toname, "/");
650 toname = ecatalloc(toname, tofield);
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 = tofield;
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 long hh;
930 int mm, ss, sign;
931
932 if (string == NULL || *string == '\0')
933 return 0;
934 if (!signable)
935 sign = 1;
936 else if (*string == '-') {
937 sign = -1;
938 ++string;
939 } else sign = 1;
940 if (sscanf(string, scheck(string, "%ld"), &hh) == 1)
941 mm = ss = 0;
942 else if (sscanf(string, scheck(string, "%ld:%d"), &hh, &mm) == 2)
943 ss = 0;
944 else if (sscanf(string, scheck(string, "%ld:%d:%d"),
945 &hh, &mm, &ss) != 3) {
946 error(errstring);
947 return 0;
948 }
949 if (hh < 0 ||
950 mm < 0 || mm >= MINSPERHOUR ||
951 ss < 0 || ss > SECSPERMIN) {
952 error(errstring);
953 return 0;
954 }
955 if (LONG_MAX / SECSPERHOUR < hh) {
956 error(_("time overflow"));
957 return 0;
958 }
959 if (noise && hh == HOURSPERDAY && mm == 0 && ss == 0)
960 warning(_("24:00 not handled by pre-1998 versions of zic"));
961 if (noise && (hh > HOURSPERDAY ||
962 (hh == HOURSPERDAY && (mm != 0 || ss != 0))))
963 warning(_("values over 24 hours not handled by pre-2007 versions of zic"));
964 return oadd(eitol(sign) * hh * eitol(SECSPERHOUR),
965 eitol(sign) * (eitol(mm) * eitol(SECSPERMIN) + eitol(ss)));
966 }
967
968 static void
969 inrule(fields, nfields)
970 register char ** const fields;
971 const int nfields;
972 {
973 static struct rule r;
974
975 if (nfields != RULE_FIELDS) {
976 error(_("wrong number of fields on Rule line"));
977 return;
978 }
979 if (*fields[RF_NAME] == '\0') {
980 error(_("nameless rule"));
981 return;
982 }
983 r.r_filename = filename;
984 r.r_linenum = linenum;
985 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
986 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
987 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
988 r.r_name = ecpyalloc(fields[RF_NAME]);
989 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
990 if (max_abbrvar_len < strlen(r.r_abbrvar))
991 max_abbrvar_len = strlen(r.r_abbrvar);
992 rules = (struct rule *) (void *) erealloc((char *) rules,
993 (int) ((nrules + 1) * sizeof *rules));
994 rules[nrules++] = r;
995 }
996
997 static int
998 inzone(fields, nfields)
999 register char ** const fields;
1000 const int nfields;
1001 {
1002 register int i;
1003 static char * buf;
1004
1005 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
1006 error(_("wrong number of fields on Zone line"));
1007 return FALSE;
1008 }
1009 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
1010 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
1011 (void) sprintf(buf,
1012 _("\"Zone %s\" line and -l option are mutually exclusive"),
1013 TZDEFAULT);
1014 error(buf);
1015 return FALSE;
1016 }
1017 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
1018 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
1019 (void) sprintf(buf,
1020 _("\"Zone %s\" line and -p option are mutually exclusive"),
1021 TZDEFRULES);
1022 error(buf);
1023 return FALSE;
1024 }
1025 for (i = 0; i < nzones; ++i)
1026 if (zones[i].z_name != NULL &&
1027 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
1028 buf = erealloc(buf, (int) (132 +
1029 strlen(fields[ZF_NAME]) +
1030 strlen(zones[i].z_filename)));
1031 (void) sprintf(buf,
1032 _("duplicate zone name %s (file \"%s\", line %d)"),
1033 fields[ZF_NAME],
1034 zones[i].z_filename,
1035 zones[i].z_linenum);
1036 error(buf);
1037 return FALSE;
1038 }
1039 return inzsub(fields, nfields, FALSE);
1040 }
1041
1042 static int
1043 inzcont(fields, nfields)
1044 register char ** const fields;
1045 const int nfields;
1046 {
1047 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
1048 error(_("wrong number of fields on Zone continuation line"));
1049 return FALSE;
1050 }
1051 return inzsub(fields, nfields, TRUE);
1052 }
1053
1054 static int
1055 inzsub(fields, nfields, iscont)
1056 register char ** const fields;
1057 const int nfields;
1058 const int iscont;
1059 {
1060 register char * cp;
1061 static struct zone z;
1062 register int i_gmtoff, i_rule, i_format;
1063 register int i_untilyear, i_untilmonth;
1064 register int i_untilday, i_untiltime;
1065 register int hasuntil;
1066
1067 if (iscont) {
1068 i_gmtoff = ZFC_GMTOFF;
1069 i_rule = ZFC_RULE;
1070 i_format = ZFC_FORMAT;
1071 i_untilyear = ZFC_TILYEAR;
1072 i_untilmonth = ZFC_TILMONTH;
1073 i_untilday = ZFC_TILDAY;
1074 i_untiltime = ZFC_TILTIME;
1075 z.z_name = NULL;
1076 } else {
1077 i_gmtoff = ZF_GMTOFF;
1078 i_rule = ZF_RULE;
1079 i_format = ZF_FORMAT;
1080 i_untilyear = ZF_TILYEAR;
1081 i_untilmonth = ZF_TILMONTH;
1082 i_untilday = ZF_TILDAY;
1083 i_untiltime = ZF_TILTIME;
1084 z.z_name = ecpyalloc(fields[ZF_NAME]);
1085 }
1086 z.z_filename = filename;
1087 z.z_linenum = linenum;
1088 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UTC offset"), TRUE);
1089 if ((cp = strchr(fields[i_format], '%')) != 0) {
1090 if (*++cp != 's' || strchr(cp, '%') != 0) {
1091 error(_("invalid abbreviation format"));
1092 return FALSE;
1093 }
1094 }
1095 z.z_rule = ecpyalloc(fields[i_rule]);
1096 z.z_format = ecpyalloc(fields[i_format]);
1097 if (max_format_len < strlen(z.z_format))
1098 max_format_len = strlen(z.z_format);
1099 hasuntil = nfields > i_untilyear;
1100 if (hasuntil) {
1101 z.z_untilrule.r_filename = filename;
1102 z.z_untilrule.r_linenum = linenum;
1103 rulesub(&z.z_untilrule,
1104 fields[i_untilyear],
1105 "only",
1106 "",
1107 (nfields > i_untilmonth) ?
1108 fields[i_untilmonth] : "Jan",
1109 (nfields > i_untilday) ? fields[i_untilday] : "1",
1110 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1111 z.z_untiltime = rpytime(&z.z_untilrule,
1112 z.z_untilrule.r_loyear);
1113 if (iscont && nzones > 0 &&
1114 z.z_untiltime > min_time &&
1115 z.z_untiltime < max_time &&
1116 zones[nzones - 1].z_untiltime > min_time &&
1117 zones[nzones - 1].z_untiltime < max_time &&
1118 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1119 error(_(
1120 "Zone continuation line end time is not after end time of previous line"
1121 ));
1122 return FALSE;
1123 }
1124 }
1125 zones = (struct zone *) (void *) erealloc((char *) zones,
1126 (int) ((nzones + 1) * sizeof *zones));
1127 zones[nzones++] = z;
1128 /*
1129 ** If there was an UNTIL field on this line,
1130 ** there's more information about the zone on the next line.
1131 */
1132 return hasuntil;
1133 }
1134
1135 static void
1136 inleap(fields, nfields)
1137 register char ** const fields;
1138 const int nfields;
1139 {
1140 register const char * cp;
1141 register const struct lookup * lp;
1142 register int i, j;
1143 int year, month, day;
1144 long dayoff, tod;
1145 zic_t t;
1146
1147 if (nfields != LEAP_FIELDS) {
1148 error(_("wrong number of fields on Leap line"));
1149 return;
1150 }
1151 dayoff = 0;
1152 cp = fields[LP_YEAR];
1153 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1154 /*
1155 ** Leapin' Lizards!
1156 */
1157 error(_("invalid leaping year"));
1158 return;
1159 }
1160 if (!leapseen || leapmaxyear < year)
1161 leapmaxyear = year;
1162 if (!leapseen || leapminyear > year)
1163 leapminyear = year;
1164 leapseen = TRUE;
1165 j = EPOCH_YEAR;
1166 while (j != year) {
1167 if (year > j) {
1168 i = len_years[isleap(j)];
1169 ++j;
1170 } else {
1171 --j;
1172 i = -len_years[isleap(j)];
1173 }
1174 dayoff = oadd(dayoff, eitol(i));
1175 }
1176 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1177 error(_("invalid month name"));
1178 return;
1179 }
1180 month = lp->l_value;
1181 j = TM_JANUARY;
1182 while (j != month) {
1183 i = len_months[isleap(year)][j];
1184 dayoff = oadd(dayoff, eitol(i));
1185 ++j;
1186 }
1187 cp = fields[LP_DAY];
1188 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1189 day <= 0 || day > len_months[isleap(year)][month]) {
1190 error(_("invalid day of month"));
1191 return;
1192 }
1193 dayoff = oadd(dayoff, eitol(day - 1));
1194 if (dayoff < 0 && !TYPE_SIGNED(zic_t)) {
1195 error(_("time before zero"));
1196 return;
1197 }
1198 if (dayoff < min_time / SECSPERDAY) {
1199 error(_("time too small"));
1200 return;
1201 }
1202 if (dayoff > max_time / SECSPERDAY) {
1203 error(_("time too large"));
1204 return;
1205 }
1206 t = (zic_t) dayoff * SECSPERDAY;
1207 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1208 cp = fields[LP_CORR];
1209 {
1210 register int positive;
1211 int count;
1212
1213 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1214 positive = FALSE;
1215 count = 1;
1216 } else if (strcmp(cp, "--") == 0) {
1217 positive = FALSE;
1218 count = 2;
1219 } else if (strcmp(cp, "+") == 0) {
1220 positive = TRUE;
1221 count = 1;
1222 } else if (strcmp(cp, "++") == 0) {
1223 positive = TRUE;
1224 count = 2;
1225 } else {
1226 error(_("illegal CORRECTION field on Leap line"));
1227 return;
1228 }
1229 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1230 error(_(
1231 "illegal Rolling/Stationary field on Leap line"
1232 ));
1233 return;
1234 }
1235 leapadd(tadd(t, tod), positive, lp->l_value, count);
1236 }
1237 }
1238
1239 static void
1240 inlink(fields, nfields)
1241 register char ** const fields;
1242 const int nfields;
1243 {
1244 struct link l;
1245
1246 if (nfields != LINK_FIELDS) {
1247 error(_("wrong number of fields on Link line"));
1248 return;
1249 }
1250 if (*fields[LF_FROM] == '\0') {
1251 error(_("blank FROM field on Link line"));
1252 return;
1253 }
1254 if (*fields[LF_TO] == '\0') {
1255 error(_("blank TO field on Link line"));
1256 return;
1257 }
1258 l.l_filename = filename;
1259 l.l_linenum = linenum;
1260 l.l_from = ecpyalloc(fields[LF_FROM]);
1261 l.l_to = ecpyalloc(fields[LF_TO]);
1262 links = (struct link *) (void *) erealloc((char *) links,
1263 (int) ((nlinks + 1) * sizeof *links));
1264 links[nlinks++] = l;
1265 }
1266
1267 static void
1268 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1269 register struct rule * const rp;
1270 const char * const loyearp;
1271 const char * const hiyearp;
1272 const char * const typep;
1273 const char * const monthp;
1274 const char * const dayp;
1275 const char * const timep;
1276 {
1277 register const struct lookup * lp;
1278 register const char * cp;
1279 register char * dp;
1280 register char * ep;
1281
1282 if ((lp = byword(monthp, mon_names)) == NULL) {
1283 error(_("invalid month name"));
1284 return;
1285 }
1286 rp->r_month = lp->l_value;
1287 rp->r_todisstd = FALSE;
1288 rp->r_todisgmt = FALSE;
1289 dp = ecpyalloc(timep);
1290 if (*dp != '\0') {
1291 ep = dp + strlen(dp) - 1;
1292 switch (lowerit(*ep)) {
1293 case 's': /* Standard */
1294 rp->r_todisstd = TRUE;
1295 rp->r_todisgmt = FALSE;
1296 *ep = '\0';
1297 break;
1298 case 'w': /* Wall */
1299 rp->r_todisstd = FALSE;
1300 rp->r_todisgmt = FALSE;
1301 *ep = '\0';
1302 break;
1303 case 'g': /* Greenwich */
1304 case 'u': /* Universal */
1305 case 'z': /* Zulu */
1306 rp->r_todisstd = TRUE;
1307 rp->r_todisgmt = TRUE;
1308 *ep = '\0';
1309 break;
1310 }
1311 }
1312 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1313 ifree(dp);
1314 /*
1315 ** Year work.
1316 */
1317 cp = loyearp;
1318 lp = byword(cp, begin_years);
1319 rp->r_lowasnum = lp == NULL;
1320 if (!rp->r_lowasnum) switch ((int) lp->l_value) {
1321 case YR_MINIMUM:
1322 rp->r_loyear = INT_MIN;
1323 break;
1324 case YR_MAXIMUM:
1325 rp->r_loyear = INT_MAX;
1326 break;
1327 default: /* "cannot happen" */
1328 (void) fprintf(stderr,
1329 _("%s: panic: Invalid l_value %d\n"),
1330 progname, lp->l_value);
1331 exit(EXIT_FAILURE);
1332 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1333 error(_("invalid starting year"));
1334 return;
1335 }
1336 cp = hiyearp;
1337 lp = byword(cp, end_years);
1338 rp->r_hiwasnum = lp == NULL;
1339 if (!rp->r_hiwasnum) switch ((int) lp->l_value) {
1340 case YR_MINIMUM:
1341 rp->r_hiyear = INT_MIN;
1342 break;
1343 case YR_MAXIMUM:
1344 rp->r_hiyear = INT_MAX;
1345 break;
1346 case YR_ONLY:
1347 rp->r_hiyear = rp->r_loyear;
1348 break;
1349 default: /* "cannot happen" */
1350 (void) fprintf(stderr,
1351 _("%s: panic: Invalid l_value %d\n"),
1352 progname, lp->l_value);
1353 exit(EXIT_FAILURE);
1354 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1355 error(_("invalid ending year"));
1356 return;
1357 }
1358 if (rp->r_loyear > rp->r_hiyear) {
1359 error(_("starting year greater than ending year"));
1360 return;
1361 }
1362 if (*typep == '\0')
1363 rp->r_yrtype = NULL;
1364 else {
1365 if (rp->r_loyear == rp->r_hiyear) {
1366 error(_("typed single year"));
1367 return;
1368 }
1369 rp->r_yrtype = ecpyalloc(typep);
1370 }
1371 /*
1372 ** Day work.
1373 ** Accept things such as:
1374 ** 1
1375 ** last-Sunday
1376 ** Sun<=20
1377 ** Sun>=7
1378 */
1379 dp = ecpyalloc(dayp);
1380 if ((lp = byword(dp, lasts)) != NULL) {
1381 rp->r_dycode = DC_DOWLEQ;
1382 rp->r_wday = lp->l_value;
1383 rp->r_dayofmonth = len_months[1][rp->r_month];
1384 } else {
1385 if ((ep = strchr(dp, '<')) != 0)
1386 rp->r_dycode = DC_DOWLEQ;
1387 else if ((ep = strchr(dp, '>')) != 0)
1388 rp->r_dycode = DC_DOWGEQ;
1389 else {
1390 ep = dp;
1391 rp->r_dycode = DC_DOM;
1392 }
1393 if (rp->r_dycode != DC_DOM) {
1394 *ep++ = 0;
1395 if (*ep++ != '=') {
1396 error(_("invalid day of month"));
1397 ifree(dp);
1398 return;
1399 }
1400 if ((lp = byword(dp, wday_names)) == NULL) {
1401 error(_("invalid weekday name"));
1402 ifree(dp);
1403 return;
1404 }
1405 rp->r_wday = lp->l_value;
1406 }
1407 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1408 rp->r_dayofmonth <= 0 ||
1409 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1410 error(_("invalid day of month"));
1411 ifree(dp);
1412 return;
1413 }
1414 }
1415 ifree(dp);
1416 }
1417
1418 static void
1419 convert(val, buf)
1420 const long val;
1421 char * const buf;
1422 {
1423 register int i;
1424 register int shift;
1425
1426 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1427 buf[i] = val >> shift;
1428 }
1429
1430 static void
1431 convert64(val, buf)
1432 const zic_t val;
1433 char * const buf;
1434 {
1435 register int i;
1436 register int shift;
1437
1438 for (i = 0, shift = 56; i < 8; ++i, shift -= 8)
1439 buf[i] = val >> shift;
1440 }
1441
1442 static void
1443 puttzcode(val, fp)
1444 const long val;
1445 FILE * const fp;
1446 {
1447 char buf[4];
1448
1449 convert(val, buf);
1450 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1451 }
1452
1453 static void
1454 puttzcode64(val, fp)
1455 const zic_t val;
1456 FILE * const fp;
1457 {
1458 char buf[8];
1459
1460 convert64(val, buf);
1461 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1462 }
1463
1464 static int
1465 atcomp(avp, bvp)
1466 const void * avp;
1467 const void * bvp;
1468 {
1469 const zic_t a = ((const struct attype *) avp)->at;
1470 const zic_t b = ((const struct attype *) bvp)->at;
1471
1472 return (a < b) ? -1 : (a > b);
1473 }
1474
1475 static int
1476 is32(x)
1477 const zic_t x;
1478 {
1479 return INT32_MIN <= x && x <= INT32_MAX;
1480 }
1481
1482 static void
1483 writezone(name, string)
1484 const char * const name;
1485 const char * const string;
1486 {
1487 register FILE * fp;
1488 register int i, j;
1489 register int leapcnt32, leapi32;
1490 register int timecnt32, timei32;
1491 register int pass;
1492 static char * fullname;
1493 static const struct tzhead tzh0;
1494 static struct tzhead tzh;
1495 zic_t ats[TZ_MAX_TIMES];
1496 unsigned char types[TZ_MAX_TIMES];
1497
1498 /*
1499 ** Sort.
1500 */
1501 if (timecnt > 1)
1502 (void) qsort((void *) attypes, (size_t) timecnt,
1503 (size_t) sizeof *attypes, atcomp);
1504 /*
1505 ** Optimize.
1506 */
1507 {
1508 int fromi;
1509 int toi;
1510
1511 toi = 0;
1512 fromi = 0;
1513 while (fromi < timecnt && attypes[fromi].at < min_time)
1514 ++fromi;
1515 if (isdsts[0] == 0)
1516 while (fromi < timecnt && attypes[fromi].type == 0)
1517 ++fromi; /* handled by default rule */
1518 for ( ; fromi < timecnt; ++fromi) {
1519 if (toi != 0 && ((attypes[fromi].at +
1520 gmtoffs[attypes[toi - 1].type]) <=
1521 (attypes[toi - 1].at + gmtoffs[toi == 1 ? 0
1522 : attypes[toi - 2].type]))) {
1523 attypes[toi - 1].type =
1524 attypes[fromi].type;
1525 continue;
1526 }
1527 if (toi == 0 ||
1528 attypes[toi - 1].type != attypes[fromi].type)
1529 attypes[toi++] = attypes[fromi];
1530 }
1531 timecnt = toi;
1532 }
1533 /*
1534 ** Transfer.
1535 */
1536 for (i = 0; i < timecnt; ++i) {
1537 ats[i] = attypes[i].at;
1538 types[i] = attypes[i].type;
1539 }
1540 /*
1541 ** Correct for leap seconds.
1542 */
1543 for (i = 0; i < timecnt; ++i) {
1544 j = leapcnt;
1545 while (--j >= 0)
1546 if (ats[i] > trans[j] - corr[j]) {
1547 ats[i] = tadd(ats[i], corr[j]);
1548 break;
1549 }
1550 }
1551 /*
1552 ** Figure out 32-bit-limited starts and counts.
1553 */
1554 timecnt32 = timecnt;
1555 timei32 = 0;
1556 leapcnt32 = leapcnt;
1557 leapi32 = 0;
1558 while (timecnt32 > 0 && !is32(ats[timecnt32 - 1]))
1559 --timecnt32;
1560 while (timecnt32 > 0 && !is32(ats[timei32])) {
1561 --timecnt32;
1562 ++timei32;
1563 }
1564 while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1]))
1565 --leapcnt32;
1566 while (leapcnt32 > 0 && !is32(trans[leapi32])) {
1567 --leapcnt32;
1568 ++leapi32;
1569 }
1570 fullname = erealloc(fullname,
1571 (int) (strlen(directory) + 1 + strlen(name) + 1));
1572 (void) sprintf(fullname, "%s/%s", directory, name);
1573 /*
1574 ** Remove old file, if any, to snap links.
1575 */
1576 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) {
1577 const char *e = strerror(errno);
1578
1579 (void) fprintf(stderr, _("%s: Can't remove %s: %s\n"),
1580 progname, fullname, e);
1581 exit(EXIT_FAILURE);
1582 }
1583 if ((fp = fopen(fullname, "wb")) == NULL) {
1584 if (mkdirs(fullname) != 0)
1585 exit(EXIT_FAILURE);
1586 if ((fp = fopen(fullname, "wb")) == NULL) {
1587 const char *e = strerror(errno);
1588
1589 (void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
1590 progname, fullname, e);
1591 exit(EXIT_FAILURE);
1592 }
1593 }
1594 for (pass = 1; pass <= 2; ++pass) {
1595 register int thistimei, thistimecnt;
1596 register int thisleapi, thisleapcnt;
1597 register int thistimelim, thisleaplim;
1598 int writetype[TZ_MAX_TIMES];
1599 int typemap[TZ_MAX_TYPES];
1600 register int thistypecnt;
1601 char thischars[TZ_MAX_CHARS];
1602 char thischarcnt;
1603 int indmap[TZ_MAX_CHARS];
1604
1605 if (pass == 1) {
1606 thistimei = timei32;
1607 thistimecnt = timecnt32;
1608 thisleapi = leapi32;
1609 thisleapcnt = leapcnt32;
1610 } else {
1611 thistimei = 0;
1612 thistimecnt = timecnt;
1613 thisleapi = 0;
1614 thisleapcnt = leapcnt;
1615 }
1616 thistimelim = thistimei + thistimecnt;
1617 thisleaplim = thisleapi + thisleapcnt;
1618 for (i = 0; i < typecnt; ++i)
1619 writetype[i] = thistimecnt == timecnt;
1620 if (thistimecnt == 0) {
1621 /*
1622 ** No transition times fall in the current
1623 ** (32- or 64-bit) window.
1624 */
1625 if (typecnt != 0)
1626 writetype[typecnt - 1] = TRUE;
1627 } else {
1628 for (i = thistimei - 1; i < thistimelim; ++i)
1629 if (i >= 0)
1630 writetype[types[i]] = TRUE;
1631 /*
1632 ** For America/Godthab and Antarctica/Palmer
1633 */
1634 if (thistimei == 0)
1635 writetype[0] = TRUE;
1636 }
1637 thistypecnt = 0;
1638 for (i = 0; i < typecnt; ++i)
1639 typemap[i] = writetype[i] ? thistypecnt++ : -1;
1640 for (i = 0; i < sizeof indmap / sizeof indmap[0]; ++i)
1641 indmap[i] = -1;
1642 thischarcnt = 0;
1643 for (i = 0; i < typecnt; ++i) {
1644 register char * thisabbr;
1645
1646 if (!writetype[i])
1647 continue;
1648 if (indmap[abbrinds[i]] >= 0)
1649 continue;
1650 thisabbr = &chars[abbrinds[i]];
1651 for (j = 0; j < thischarcnt; ++j)
1652 if (strcmp(&thischars[j], thisabbr) == 0)
1653 break;
1654 if (j == thischarcnt) {
1655 (void) strcpy(&thischars[(int) thischarcnt],
1656 thisabbr);
1657 thischarcnt += strlen(thisabbr) + 1;
1658 }
1659 indmap[abbrinds[i]] = j;
1660 }
1661 #define DO(field) (void) fwrite((void *) tzh.field, \
1662 (size_t) sizeof tzh.field, (size_t) 1, fp)
1663 tzh = tzh0;
1664 (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
1665 tzh.tzh_version[0] = ZIC_VERSION;
1666 convert(eitol(thistypecnt), tzh.tzh_ttisgmtcnt);
1667 convert(eitol(thistypecnt), tzh.tzh_ttisstdcnt);
1668 convert(eitol(thisleapcnt), tzh.tzh_leapcnt);
1669 convert(eitol(thistimecnt), tzh.tzh_timecnt);
1670 convert(eitol(thistypecnt), tzh.tzh_typecnt);
1671 convert(eitol(thischarcnt), tzh.tzh_charcnt);
1672 DO(tzh_magic);
1673 DO(tzh_version);
1674 DO(tzh_reserved);
1675 DO(tzh_ttisgmtcnt);
1676 DO(tzh_ttisstdcnt);
1677 DO(tzh_leapcnt);
1678 DO(tzh_timecnt);
1679 DO(tzh_typecnt);
1680 DO(tzh_charcnt);
1681 #undef DO
1682 for (i = thistimei; i < thistimelim; ++i)
1683 if (pass == 1)
1684 puttzcode((long) ats[i], fp);
1685 else puttzcode64(ats[i], fp);
1686 for (i = thistimei; i < thistimelim; ++i) {
1687 unsigned char uc;
1688
1689 uc = typemap[types[i]];
1690 (void) fwrite((void *) &uc,
1691 (size_t) sizeof uc,
1692 (size_t) 1,
1693 fp);
1694 }
1695 for (i = 0; i < typecnt; ++i)
1696 if (writetype[i]) {
1697 puttzcode(gmtoffs[i], fp);
1698 (void) putc(isdsts[i], fp);
1699 (void) putc((unsigned char) indmap[abbrinds[i]], fp);
1700 }
1701 if (thischarcnt != 0)
1702 (void) fwrite((void *) thischars,
1703 (size_t) sizeof thischars[0],
1704 (size_t) thischarcnt, fp);
1705 for (i = thisleapi; i < thisleaplim; ++i) {
1706 register zic_t todo;
1707
1708 if (roll[i]) {
1709 if (timecnt == 0 || trans[i] < ats[0]) {
1710 j = 0;
1711 while (isdsts[j])
1712 if (++j >= typecnt) {
1713 j = 0;
1714 break;
1715 }
1716 } else {
1717 j = 1;
1718 while (j < timecnt &&
1719 trans[i] >= ats[j])
1720 ++j;
1721 j = types[j - 1];
1722 }
1723 todo = tadd(trans[i], -gmtoffs[j]);
1724 } else todo = trans[i];
1725 if (pass == 1)
1726 puttzcode((long) todo, fp);
1727 else puttzcode64(todo, fp);
1728 puttzcode(corr[i], fp);
1729 }
1730 for (i = 0; i < typecnt; ++i)
1731 if (writetype[i])
1732 (void) putc(ttisstds[i], fp);
1733 for (i = 0; i < typecnt; ++i)
1734 if (writetype[i])
1735 (void) putc(ttisgmts[i], fp);
1736 }
1737 (void) fprintf(fp, "\n%s\n", string);
1738 if (ferror(fp) || fclose(fp)) {
1739 (void) fprintf(stderr, _("%s: Error writing %s\n"),
1740 progname, fullname);
1741 exit(EXIT_FAILURE);
1742 }
1743 }
1744
1745 static void
1746 doabbr(abbr, format, letters, isdst, doquotes)
1747 char * const abbr;
1748 const char * const format;
1749 const char * const letters;
1750 const int isdst;
1751 const int doquotes;
1752 {
1753 register char * cp;
1754 register char * slashp;
1755 register int len;
1756
1757 slashp = strchr(format, '/');
1758 if (slashp == NULL) {
1759 if (letters == NULL)
1760 (void) strcpy(abbr, format);
1761 else (void) sprintf(abbr, format, letters);
1762 } else if (isdst) {
1763 (void) strcpy(abbr, slashp + 1);
1764 } else {
1765 if (slashp > format)
1766 (void) strncpy(abbr, format,
1767 (unsigned) (slashp - format));
1768 abbr[slashp - format] = '\0';
1769 }
1770 if (!doquotes)
1771 return;
1772 for (cp = abbr; *cp != '\0'; ++cp)
1773 if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ", *cp) == NULL &&
1774 strchr("abcdefghijklmnopqrstuvwxyz", *cp) == NULL)
1775 break;
1776 len = strlen(abbr);
1777 if (len > 0 && *cp == '\0')
1778 return;
1779 abbr[len + 2] = '\0';
1780 abbr[len + 1] = '>';
1781 for ( ; len > 0; --len)
1782 abbr[len] = abbr[len - 1];
1783 abbr[0] = '<';
1784 }
1785
1786 static void
1787 updateminmax(x)
1788 const int x;
1789 {
1790 if (min_year > x)
1791 min_year = x;
1792 if (max_year < x)
1793 max_year = x;
1794 }
1795
1796 static int
1797 stringoffset(result, offset)
1798 char * result;
1799 long offset;
1800 {
1801 register int hours;
1802 register int minutes;
1803 register int seconds;
1804
1805 result[0] = '\0';
1806 if (offset < 0) {
1807 (void) strcpy(result, "-");
1808 offset = -offset;
1809 }
1810 seconds = offset % SECSPERMIN;
1811 offset /= SECSPERMIN;
1812 minutes = offset % MINSPERHOUR;
1813 offset /= MINSPERHOUR;
1814 hours = offset;
1815 if (hours >= HOURSPERDAY) {
1816 result[0] = '\0';
1817 return -1;
1818 }
1819 (void) sprintf(end(result), "%d", hours);
1820 if (minutes != 0 || seconds != 0) {
1821 (void) sprintf(end(result), ":%02d", minutes);
1822 if (seconds != 0)
1823 (void) sprintf(end(result), ":%02d", seconds);
1824 }
1825 return 0;
1826 }
1827
1828 static int
1829 stringrule(result, rp, dstoff, gmtoff)
1830 char * result;
1831 const struct rule * const rp;
1832 const long dstoff;
1833 const long gmtoff;
1834 {
1835 register long tod;
1836
1837 result = end(result);
1838 if (rp->r_dycode == DC_DOM) {
1839 register int month, total;
1840
1841 if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY)
1842 return -1;
1843 total = 0;
1844 for (month = 0; month < rp->r_month; ++month)
1845 total += len_months[0][month];
1846 (void) sprintf(result, "J%d", total + rp->r_dayofmonth);
1847 } else {
1848 register int week;
1849
1850 if (rp->r_dycode == DC_DOWGEQ) {
1851 week = 1 + rp->r_dayofmonth / DAYSPERWEEK;
1852 if ((week - 1) * DAYSPERWEEK + 1 != rp->r_dayofmonth)
1853 return -1;
1854 } else if (rp->r_dycode == DC_DOWLEQ) {
1855 if (rp->r_dayofmonth == len_months[1][rp->r_month])
1856 week = 5;
1857 else {
1858 week = 1 + rp->r_dayofmonth / DAYSPERWEEK;
1859 if (week * DAYSPERWEEK - 1 != rp->r_dayofmonth)
1860 return -1;
1861 }
1862 } else return -1; /* "cannot happen" */
1863 (void) sprintf(result, "M%d.%d.%d",
1864 rp->r_month + 1, week, rp->r_wday);
1865 }
1866 tod = rp->r_tod;
1867 if (rp->r_todisgmt)
1868 tod += gmtoff;
1869 if (rp->r_todisstd && rp->r_stdoff == 0)
1870 tod += dstoff;
1871 if (tod < 0) {
1872 result[0] = '\0';
1873 return -1;
1874 }
1875 if (tod != 2 * SECSPERMIN * MINSPERHOUR) {
1876 (void) strcat(result, "/");
1877 if (stringoffset(end(result), tod) != 0)
1878 return -1;
1879 }
1880 return 0;
1881 }
1882
1883 static void
1884 stringzone(result, zpfirst, zonecount)
1885 char * result;
1886 const struct zone * const zpfirst;
1887 const int zonecount;
1888 {
1889 register const struct zone * zp;
1890 register struct rule * rp;
1891 register struct rule * stdrp;
1892 register struct rule * dstrp;
1893 register int i;
1894 register const char * abbrvar;
1895
1896 result[0] = '\0';
1897 zp = zpfirst + zonecount - 1;
1898 stdrp = dstrp = NULL;
1899 for (i = 0; i < zp->z_nrules; ++i) {
1900 rp = &zp->z_rules[i];
1901 if (rp->r_hiwasnum || rp->r_hiyear != INT_MAX)
1902 continue;
1903 if (rp->r_yrtype != NULL)
1904 continue;
1905 if (rp->r_stdoff == 0) {
1906 if (stdrp == NULL)
1907 stdrp = rp;
1908 else return;
1909 } else {
1910 if (dstrp == NULL)
1911 dstrp = rp;
1912 else return;
1913 }
1914 }
1915 if (stdrp == NULL && dstrp == NULL) {
1916 /*
1917 ** There are no rules running through "max".
1918 ** Let's find the latest rule.
1919 */
1920 for (i = 0; i < zp->z_nrules; ++i) {
1921 rp = &zp->z_rules[i];
1922 if (stdrp == NULL || rp->r_hiyear > stdrp->r_hiyear ||
1923 (rp->r_hiyear == stdrp->r_hiyear &&
1924 rp->r_month > stdrp->r_month))
1925 stdrp = rp;
1926 }
1927 if (stdrp != NULL && stdrp->r_stdoff != 0)
1928 return; /* We end up in DST (a POSIX no-no). */
1929 /*
1930 ** Horrid special case: if year is 2037,
1931 ** presume this is a zone handled on a year-by-year basis;
1932 ** do not try to apply a rule to the zone.
1933 */
1934 if (stdrp != NULL && stdrp->r_hiyear == 2037)
1935 return;
1936 }
1937 if (stdrp == NULL && zp->z_nrules != 0)
1938 return;
1939 abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar;
1940 doabbr(result, zp->z_format, abbrvar, FALSE, TRUE);
1941 if (stringoffset(end(result), -zp->z_gmtoff) != 0) {
1942 result[0] = '\0';
1943 return;
1944 }
1945 if (dstrp == NULL)
1946 return;
1947 doabbr(end(result), zp->z_format, dstrp->r_abbrvar, TRUE, TRUE);
1948 if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR)
1949 if (stringoffset(end(result),
1950 -(zp->z_gmtoff + dstrp->r_stdoff)) != 0) {
1951 result[0] = '\0';
1952 return;
1953 }
1954 (void) strcat(result, ",");
1955 if (stringrule(result, dstrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
1956 result[0] = '\0';
1957 return;
1958 }
1959 (void) strcat(result, ",");
1960 if (stringrule(result, stdrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) {
1961 result[0] = '\0';
1962 return;
1963 }
1964 }
1965
1966 static void
1967 outzone(zpfirst, zonecount)
1968 const struct zone * const zpfirst;
1969 const int zonecount;
1970 {
1971 register const struct zone * zp;
1972 register struct rule * rp;
1973 register int i, j;
1974 register int usestart, useuntil;
1975 register zic_t starttime, untiltime;
1976 register long gmtoff;
1977 register long stdoff;
1978 register int year;
1979 register long startoff;
1980 register int startttisstd;
1981 register int startttisgmt;
1982 register int type;
1983 register char * startbuf;
1984 register char * ab;
1985 register char * envvar;
1986 register int max_abbr_len;
1987 register int max_envvar_len;
1988
1989 max_abbr_len = 2 + max_format_len + max_abbrvar_len;
1990 max_envvar_len = 2 * max_abbr_len + 5 * 9;
1991 startbuf = emalloc(max_abbr_len + 1);
1992 ab = emalloc(max_abbr_len + 1);
1993 envvar = emalloc(max_envvar_len + 1);
1994 INITIALIZE(untiltime);
1995 INITIALIZE(starttime);
1996 /*
1997 ** Now. . .finally. . .generate some useful data!
1998 */
1999 timecnt = 0;
2000 typecnt = 0;
2001 charcnt = 0;
2002 /*
2003 ** Thanks to Earl Chew
2004 ** for noting the need to unconditionally initialize startttisstd.
2005 */
2006 startttisstd = FALSE;
2007 startttisgmt = FALSE;
2008 min_year = max_year = EPOCH_YEAR;
2009 if (leapseen) {
2010 updateminmax(leapminyear);
2011 updateminmax(leapmaxyear);
2012 }
2013 for (i = 0; i < zonecount; ++i) {
2014 zp = &zpfirst[i];
2015 updateminmax(zp->z_untilrule.r_loyear);
2016 for (j = 0; j < zp->z_nrules; ++j) {
2017 rp = &zp->z_rules[j];
2018 if (rp->r_lowasnum)
2019 updateminmax(rp->r_loyear);
2020 if (rp->r_hiwasnum)
2021 updateminmax(rp->r_hiyear);
2022 }
2023 }
2024 /*
2025 ** Generate lots of data if a rule can't cover all future times.
2026 */
2027 stringzone(envvar, zpfirst, zonecount);
2028 if (noise && envvar[0] == '\0') {
2029 register char * wp;
2030
2031 wp = ecpyalloc(_("no POSIX environment variable for zone"));
2032 wp = ecatalloc(wp, " ");
2033 wp = ecatalloc(wp, zpfirst->z_name);
2034 warning(wp);
2035 ifree(wp);
2036 }
2037 if (envvar[0] == '\0') {
2038 if (min_year >= INT_MIN + YEARSPERREPEAT)
2039 min_year -= YEARSPERREPEAT;
2040 else min_year = INT_MIN;
2041 if (max_year <= INT_MAX - YEARSPERREPEAT)
2042 max_year += YEARSPERREPEAT;
2043 else max_year = INT_MAX;
2044 }
2045 /*
2046 ** For the benefit of older systems, generate data through 2037.
2047 */
2048 if (max_year < 2037)
2049 max_year = 2037;
2050 for (i = 0; i < zonecount; ++i) {
2051 /*
2052 ** A guess that may well be corrected later.
2053 */
2054 stdoff = 0;
2055 zp = &zpfirst[i];
2056 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
2057 useuntil = i < (zonecount - 1);
2058 if (useuntil && zp->z_untiltime <= min_time)
2059 continue;
2060 gmtoff = zp->z_gmtoff;
2061 eat(zp->z_filename, zp->z_linenum);
2062 *startbuf = '\0';
2063 startoff = zp->z_gmtoff;
2064 if (zp->z_nrules == 0) {
2065 stdoff = zp->z_stdoff;
2066 doabbr(startbuf, zp->z_format,
2067 (char *) NULL, stdoff != 0, FALSE);
2068 type = addtype(oadd(zp->z_gmtoff, stdoff),
2069 startbuf, stdoff != 0, startttisstd,
2070 startttisgmt);
2071 if (usestart) {
2072 addtt(starttime, type);
2073 usestart = FALSE;
2074 } else if (stdoff != 0)
2075 addtt(min_time, type);
2076 } else for (year = min_year; year <= max_year; ++year) {
2077 if (useuntil && year > zp->z_untilrule.r_hiyear)
2078 break;
2079 /*
2080 ** Mark which rules to do in the current year.
2081 ** For those to do, calculate rpytime(rp, year);
2082 */
2083 for (j = 0; j < zp->z_nrules; ++j) {
2084 rp = &zp->z_rules[j];
2085 eats(zp->z_filename, zp->z_linenum,
2086 rp->r_filename, rp->r_linenum);
2087 rp->r_todo = year >= rp->r_loyear &&
2088 year <= rp->r_hiyear &&
2089 yearistype(year, rp->r_yrtype);
2090 if (rp->r_todo)
2091 rp->r_temp = rpytime(rp, year);
2092 }
2093 for ( ; ; ) {
2094 register int k;
2095 register zic_t jtime, ktime;
2096 register long offset;
2097
2098 INITIALIZE(ktime);
2099 if (useuntil) {
2100 /*
2101 ** Turn untiltime into UTC
2102 ** assuming the current gmtoff and
2103 ** stdoff values.
2104 */
2105 untiltime = zp->z_untiltime;
2106 if (!zp->z_untilrule.r_todisgmt)
2107 untiltime = tadd(untiltime,
2108 -gmtoff);
2109 if (!zp->z_untilrule.r_todisstd)
2110 untiltime = tadd(untiltime,
2111 -stdoff);
2112 }
2113 /*
2114 ** Find the rule (of those to do, if any)
2115 ** that takes effect earliest in the year.
2116 */
2117 k = -1;
2118 for (j = 0; j < zp->z_nrules; ++j) {
2119 rp = &zp->z_rules[j];
2120 if (!rp->r_todo)
2121 continue;
2122 eats(zp->z_filename, zp->z_linenum,
2123 rp->r_filename, rp->r_linenum);
2124 offset = rp->r_todisgmt ? 0 : gmtoff;
2125 if (!rp->r_todisstd)
2126 offset = oadd(offset, stdoff);
2127 jtime = rp->r_temp;
2128 if (jtime == min_time ||
2129 jtime == max_time)
2130 continue;
2131 jtime = tadd(jtime, -offset);
2132 if (k < 0 || jtime < ktime) {
2133 k = j;
2134 ktime = jtime;
2135 }
2136 }
2137 if (k < 0)
2138 break; /* go on to next year */
2139 rp = &zp->z_rules[k];
2140 rp->r_todo = FALSE;
2141 if (useuntil && ktime >= untiltime)
2142 break;
2143 stdoff = rp->r_stdoff;
2144 if (usestart && ktime == starttime)
2145 usestart = FALSE;
2146 if (usestart) {
2147 if (ktime < starttime) {
2148 startoff = oadd(zp->z_gmtoff,
2149 stdoff);
2150 doabbr(startbuf, zp->z_format,
2151 rp->r_abbrvar,
2152 rp->r_stdoff != 0,
2153 FALSE);
2154 continue;
2155 }
2156 if (*startbuf == '\0' &&
2157 startoff == oadd(zp->z_gmtoff,
2158 stdoff)) {
2159 doabbr(startbuf,
2160 zp->z_format,
2161 rp->r_abbrvar,
2162 rp->r_stdoff !=
2163 0,
2164 FALSE);
2165 }
2166 }
2167 eats(zp->z_filename, zp->z_linenum,
2168 rp->r_filename, rp->r_linenum);
2169 doabbr(ab, zp->z_format, rp->r_abbrvar,
2170 rp->r_stdoff != 0, FALSE);
2171 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
2172 type = addtype(offset, ab, rp->r_stdoff != 0,
2173 rp->r_todisstd, rp->r_todisgmt);
2174 addtt(ktime, type);
2175 }
2176 }
2177 if (usestart) {
2178 if (*startbuf == '\0' &&
2179 zp->z_format != NULL &&
2180 strchr(zp->z_format, '%') == NULL &&
2181 strchr(zp->z_format, '/') == NULL)
2182 (void) strcpy(startbuf, zp->z_format);
2183 eat(zp->z_filename, zp->z_linenum);
2184 if (*startbuf == '\0')
2185 error(_("can't determine time zone abbreviation to use just after until time"));
2186 else addtt(starttime,
2187 addtype(startoff, startbuf,
2188 startoff != zp->z_gmtoff,
2189 startttisstd,
2190 startttisgmt));
2191 }
2192 /*
2193 ** Now we may get to set starttime for the next zone line.
2194 */
2195 if (useuntil) {
2196 startttisstd = zp->z_untilrule.r_todisstd;
2197 startttisgmt = zp->z_untilrule.r_todisgmt;
2198 starttime = zp->z_untiltime;
2199 if (!startttisstd)
2200 starttime = tadd(starttime, -stdoff);
2201 if (!startttisgmt)
2202 starttime = tadd(starttime, -gmtoff);
2203 }
2204 }
2205 writezone(zpfirst->z_name, envvar);
2206 ifree(startbuf);
2207 ifree(ab);
2208 ifree(envvar);
2209 }
2210
2211 static void
2212 addtt(starttime, type)
2213 const zic_t starttime;
2214 int type;
2215 {
2216 if (starttime <= min_time ||
2217 (timecnt == 1 && attypes[0].at < min_time)) {
2218 gmtoffs[0] = gmtoffs[type];
2219 isdsts[0] = isdsts[type];
2220 ttisstds[0] = ttisstds[type];
2221 ttisgmts[0] = ttisgmts[type];
2222 if (abbrinds[type] != 0)
2223 (void) strcpy(chars, &chars[abbrinds[type]]);
2224 abbrinds[0] = 0;
2225 charcnt = strlen(chars) + 1;
2226 typecnt = 1;
2227 timecnt = 0;
2228 type = 0;
2229 }
2230 if (timecnt >= TZ_MAX_TIMES) {
2231 error(_("too many transitions?!"));
2232 exit(EXIT_FAILURE);
2233 }
2234 attypes[timecnt].at = starttime;
2235 attypes[timecnt].type = type;
2236 ++timecnt;
2237 }
2238
2239 static int
2240 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
2241 const long gmtoff;
2242 const char * const abbr;
2243 const int isdst;
2244 const int ttisstd;
2245 const int ttisgmt;
2246 {
2247 register int i, j;
2248
2249 if (isdst != TRUE && isdst != FALSE) {
2250 error(_("internal error - addtype called with bad isdst"));
2251 exit(EXIT_FAILURE);
2252 }
2253 if (ttisstd != TRUE && ttisstd != FALSE) {
2254 error(_("internal error - addtype called with bad ttisstd"));
2255 exit(EXIT_FAILURE);
2256 }
2257 if (ttisgmt != TRUE && ttisgmt != FALSE) {
2258 error(_("internal error - addtype called with bad ttisgmt"));
2259 exit(EXIT_FAILURE);
2260 }
2261 /*
2262 ** See if there's already an entry for this zone type.
2263 ** If so, just return its index.
2264 */
2265 for (i = 0; i < typecnt; ++i) {
2266 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
2267 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
2268 ttisstd == ttisstds[i] &&
2269 ttisgmt == ttisgmts[i])
2270 return i;
2271 }
2272 /*
2273 ** There isn't one; add a new one, unless there are already too
2274 ** many.
2275 */
2276 if (typecnt >= TZ_MAX_TYPES) {
2277 error(_("too many local time types"));
2278 exit(EXIT_FAILURE);
2279 }
2280 if (! (-1L - 2147483647L <= gmtoff && gmtoff <= 2147483647L)) {
2281 error(_("UTC offset out of range"));
2282 exit(EXIT_FAILURE);
2283 }
2284 gmtoffs[i] = gmtoff;
2285 isdsts[i] = isdst;
2286 ttisstds[i] = ttisstd;
2287 ttisgmts[i] = ttisgmt;
2288
2289 for (j = 0; j < charcnt; ++j)
2290 if (strcmp(&chars[j], abbr) == 0)
2291 break;
2292 if (j == charcnt)
2293 newabbr(abbr);
2294 abbrinds[i] = j;
2295 ++typecnt;
2296 return i;
2297 }
2298
2299 static void
2300 leapadd(t, positive, rolling, count)
2301 const zic_t t;
2302 const int positive;
2303 const int rolling;
2304 int count;
2305 {
2306 register int i, j;
2307
2308 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
2309 error(_("too many leap seconds"));
2310 exit(EXIT_FAILURE);
2311 }
2312 for (i = 0; i < leapcnt; ++i)
2313 if (t <= trans[i]) {
2314 if (t == trans[i]) {
2315 error(_("repeated leap second moment"));
2316 exit(EXIT_FAILURE);
2317 }
2318 break;
2319 }
2320 do {
2321 for (j = leapcnt; j > i; --j) {
2322 trans[j] = trans[j - 1];
2323 corr[j] = corr[j - 1];
2324 roll[j] = roll[j - 1];
2325 }
2326 trans[i] = t;
2327 corr[i] = positive ? 1L : eitol(-count);
2328 roll[i] = rolling;
2329 ++leapcnt;
2330 } while (positive && --count != 0);
2331 }
2332
2333 static void
2334 adjleap P((void))
2335 {
2336 register int i;
2337 register long last = 0;
2338
2339 /*
2340 ** propagate leap seconds forward
2341 */
2342 for (i = 0; i < leapcnt; ++i) {
2343 trans[i] = tadd(trans[i], last);
2344 last = corr[i] += last;
2345 }
2346 }
2347
2348 static int
2349 yearistype(year, type)
2350 const int year;
2351 const char * const type;
2352 {
2353 static char * buf;
2354 int result;
2355
2356 if (type == NULL || *type == '\0')
2357 return TRUE;
2358 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
2359 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
2360 result = system(buf);
2361 if (WIFEXITED(result)) switch (WEXITSTATUS(result)) {
2362 case 0:
2363 return TRUE;
2364 case 1:
2365 return FALSE;
2366 }
2367 error(_("Wild result from command execution"));
2368 (void) fprintf(stderr, _("%s: command was '%s', result was %d\n"),
2369 progname, buf, result);
2370 for ( ; ; )
2371 exit(EXIT_FAILURE);
2372 }
2373
2374 static int
2375 lowerit(a)
2376 int a;
2377 {
2378 a = (unsigned char) a;
2379 return (isascii(a) && isupper(a)) ? tolower(a) : a;
2380 }
2381
2382 static int
2383 ciequal(ap, bp) /* case-insensitive equality */
2384 register const char * ap;
2385 register const char * bp;
2386 {
2387 while (lowerit(*ap) == lowerit(*bp++))
2388 if (*ap++ == '\0')
2389 return TRUE;
2390 return FALSE;
2391 }
2392
2393 static int
2394 itsabbr(abbr, word)
2395 register const char * abbr;
2396 register const char * word;
2397 {
2398 if (lowerit(*abbr) != lowerit(*word))
2399 return FALSE;
2400 ++word;
2401 while (*++abbr != '\0')
2402 do {
2403 if (*word == '\0')
2404 return FALSE;
2405 } while (lowerit(*word++) != lowerit(*abbr));
2406 return TRUE;
2407 }
2408
2409 static const struct lookup *
2410 byword(word, table)
2411 register const char * const word;
2412 register const struct lookup * const table;
2413 {
2414 register const struct lookup * foundlp;
2415 register const struct lookup * lp;
2416
2417 if (word == NULL || table == NULL)
2418 return NULL;
2419 /*
2420 ** Look for exact match.
2421 */
2422 for (lp = table; lp->l_word != NULL; ++lp)
2423 if (ciequal(word, lp->l_word))
2424 return lp;
2425 /*
2426 ** Look for inexact match.
2427 */
2428 foundlp = NULL;
2429 for (lp = table; lp->l_word != NULL; ++lp)
2430 if (itsabbr(word, lp->l_word)) {
2431 if (foundlp == NULL)
2432 foundlp = lp;
2433 else return NULL; /* multiple inexact matches */
2434 }
2435 return foundlp;
2436 }
2437
2438 static char **
2439 getfields(cp)
2440 register char * cp;
2441 {
2442 register char * dp;
2443 register char ** array;
2444 register int nsubs;
2445
2446 if (cp == NULL)
2447 return NULL;
2448 array = (char **) (void *)
2449 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
2450 nsubs = 0;
2451 for ( ; ; ) {
2452 while (isascii((unsigned char) *cp) &&
2453 isspace((unsigned char) *cp))
2454 ++cp;
2455 if (*cp == '\0' || *cp == '#')
2456 break;
2457 array[nsubs++] = dp = cp;
2458 do {
2459 if ((*dp = *cp++) != '"')
2460 ++dp;
2461 else while ((*dp = *cp++) != '"')
2462 if (*dp != '\0')
2463 ++dp;
2464 else {
2465 error(_(
2466 "Odd number of quotation marks"
2467 ));
2468 exit(1);
2469 }
2470 } while (*cp != '\0' && *cp != '#' &&
2471 (!isascii(*cp) || !isspace((unsigned char) *cp)));
2472 if (isascii(*cp) && isspace((unsigned char) *cp))
2473 ++cp;
2474 *dp = '\0';
2475 }
2476 array[nsubs] = NULL;
2477 return array;
2478 }
2479
2480 static long
2481 oadd(t1, t2)
2482 const long t1;
2483 const long t2;
2484 {
2485 register long t;
2486
2487 t = t1 + t2;
2488 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2489 error(_("time overflow"));
2490 exit(EXIT_FAILURE);
2491 }
2492 return t;
2493 }
2494
2495 static zic_t
2496 tadd(t1, t2)
2497 const zic_t t1;
2498 const long t2;
2499 {
2500 register zic_t t;
2501
2502 if (t1 == max_time && t2 > 0)
2503 return max_time;
2504 if (t1 == min_time && t2 < 0)
2505 return min_time;
2506 t = t1 + t2;
2507 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2508 error(_("time overflow"));
2509 exit(EXIT_FAILURE);
2510 }
2511 return t;
2512 }
2513
2514 /*
2515 ** Given a rule, and a year, compute the date - in seconds since January 1,
2516 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
2517 */
2518
2519 static zic_t
2520 rpytime(rp, wantedy)
2521 register const struct rule * const rp;
2522 register const int wantedy;
2523 {
2524 register int y, m, i;
2525 register long dayoff; /* with a nod to Margaret O. */
2526 register zic_t t;
2527
2528 if (wantedy == INT_MIN)
2529 return min_time;
2530 if (wantedy == INT_MAX)
2531 return max_time;
2532 dayoff = 0;
2533 m = TM_JANUARY;
2534 y = EPOCH_YEAR;
2535 while (wantedy != y) {
2536 if (wantedy > y) {
2537 i = len_years[isleap(y)];
2538 ++y;
2539 } else {
2540 --y;
2541 i = -len_years[isleap(y)];
2542 }
2543 dayoff = oadd(dayoff, eitol(i));
2544 }
2545 while (m != rp->r_month) {
2546 i = len_months[isleap(y)][m];
2547 dayoff = oadd(dayoff, eitol(i));
2548 ++m;
2549 }
2550 i = rp->r_dayofmonth;
2551 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2552 if (rp->r_dycode == DC_DOWLEQ)
2553 --i;
2554 else {
2555 error(_("use of 2/29 in non leap-year"));
2556 exit(EXIT_FAILURE);
2557 }
2558 }
2559 --i;
2560 dayoff = oadd(dayoff, eitol(i));
2561 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2562 register long wday;
2563
2564 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2565 wday = eitol(EPOCH_WDAY);
2566 /*
2567 ** Don't trust mod of negative numbers.
2568 */
2569 if (dayoff >= 0)
2570 wday = (wday + dayoff) % LDAYSPERWEEK;
2571 else {
2572 wday -= ((-dayoff) % LDAYSPERWEEK);
2573 if (wday < 0)
2574 wday += LDAYSPERWEEK;
2575 }
2576 while (wday != eitol(rp->r_wday))
2577 if (rp->r_dycode == DC_DOWGEQ) {
2578 dayoff = oadd(dayoff, (long) 1);
2579 if (++wday >= LDAYSPERWEEK)
2580 wday = 0;
2581 ++i;
2582 } else {
2583 dayoff = oadd(dayoff, (long) -1);
2584 if (--wday < 0)
2585 wday = LDAYSPERWEEK - 1;
2586 --i;
2587 }
2588 if (i < 0 || i >= len_months[isleap(y)][m]) {
2589 if (noise)
2590 warning(_("rule goes past start/end of month--\
2591 will not work with pre-2004 versions of zic"));
2592 }
2593 }
2594 if (dayoff < min_time / SECSPERDAY)
2595 return min_time;
2596 if (dayoff > max_time / SECSPERDAY)
2597 return max_time;
2598 t = (zic_t) dayoff * SECSPERDAY;
2599 return tadd(t, rp->r_tod);
2600 }
2601
2602 static void
2603 newabbr(string)
2604 const char * const string;
2605 {
2606 register int i;
2607
2608 if (strcmp(string, GRANDPARENTED) != 0) {
2609 register const char * cp;
2610 register char * wp;
2611
2612 /*
2613 ** Want one to ZIC_MAX_ABBR_LEN_WO_WARN alphabetics
2614 ** optionally followed by a + or - and a number from 1 to 14.
2615 */
2616 cp = string;
2617 wp = NULL;
2618 while (isascii((unsigned char) *cp) &&
2619 isalpha((unsigned char) *cp))
2620 ++cp;
2621 if (cp - string == 0)
2622 wp = _("time zone abbreviation lacks alphabetic at start");
2623 if (noise && cp - string > 3)
2624 wp = _("time zone abbreviation has more than 3 alphabetics");
2625 if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN)
2626 wp = _("time zone abbreviation has too many alphabetics");
2627 if (wp == NULL && (*cp == '+' || *cp == '-')) {
2628 ++cp;
2629 if (isascii((unsigned char) *cp) &&
2630 isdigit((unsigned char) *cp))
2631 if (*cp++ == '1' &&
2632 *cp >= '0' && *cp <= '4')
2633 ++cp;
2634 }
2635 if (*cp != '\0')
2636 wp = _("time zone abbreviation differs from POSIX standard");
2637 if (wp != NULL) {
2638 wp = ecpyalloc(wp);
2639 wp = ecatalloc(wp, " (");
2640 wp = ecatalloc(wp, string);
2641 wp = ecatalloc(wp, ")");
2642 warning(wp);
2643 ifree(wp);
2644 }
2645 }
2646 i = strlen(string) + 1;
2647 if (charcnt + i > TZ_MAX_CHARS) {
2648 error(_("too many, or too long, time zone abbreviations"));
2649 exit(EXIT_FAILURE);
2650 }
2651 (void) strcpy(&chars[charcnt], string);
2652 charcnt += eitol(i);
2653 }
2654
2655 static int
2656 mkdirs(argname)
2657 char * argname;
2658 {
2659 register char * name;
2660 register char * cp;
2661
2662 if (argname == NULL || *argname == '\0')
2663 return 0;
2664 cp = name = ecpyalloc(argname);
2665 while ((cp = strchr(cp + 1, '/')) != 0) {
2666 *cp = '\0';
2667 #ifndef unix
2668 /*
2669 ** DOS drive specifier?
2670 */
2671 if (isalpha((unsigned char) name[0]) &&
2672 name[1] == ':' && name[2] == '\0') {
2673 *cp = '/';
2674 continue;
2675 }
2676 #endif /* !defined unix */
2677 if (!itsdir(name)) {
2678 /*
2679 ** It doesn't seem to exist, so we try to create it.
2680 ** Creation may fail because of the directory being
2681 ** created by some other multiprocessor, so we get
2682 ** to do extra checking.
2683 */
2684 if (mkdir(name, MKDIR_UMASK) != 0) {
2685 const char *e = strerror(errno);
2686
2687 if (errno != EEXIST || !itsdir(name)) {
2688 (void) fprintf(stderr,
2689 _("%s: Can't create directory %s: %s\n"),
2690 progname, name, e);
2691 ifree(name);
2692 return -1;
2693 }
2694 }
2695 }
2696 *cp = '/';
2697 }
2698 ifree(name);
2699 return 0;
2700 }
2701
2702 static long
2703 eitol(i)
2704 const int i;
2705 {
2706 long l;
2707
2708 l = i;
2709 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2710 (void) fprintf(stderr,
2711 _("%s: %d did not sign extend correctly\n"),
2712 progname, i);
2713 exit(EXIT_FAILURE);
2714 }
2715 return l;
2716 }
2717
2718 /*
2719 ** UNIX was a registered trademark of The Open Group in 2003.
2720 */
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