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- Subject: v18i113: Table-driven ctime/time/localtime/date package, Part03/07
- Newsgroups: comp.sources.unix
- Sender: sources
- Approved: rsalz@uunet.UU.NET
-
- Submitted-by: ado@ncifcrf.gov
- Posting-number: Volume 18, Issue 113
- Archive-name: localtime3/part03
-
- : To unbundle, sh this file
- echo file 'zic.c' >&2
- cat >'zic.c' <<'End of zic.c'
- #ifndef lint
- #ifndef NOID
- static char elsieid[] = "@(#)zic.c 7.1";
- #endif /* !defined NOID */
- #endif /* !defined lint */
-
- #include "private.h"
- #include "tzfile.h"
-
- struct rule {
- const char * r_filename;
- int r_linenum;
- const char * r_name;
-
- int r_loyear; /* for example, 1986 */
- int r_hiyear; /* for example, 1986 */
- const char * r_yrtype;
-
- int r_month; /* 0..11 */
-
- int r_dycode; /* see below */
- int r_dayofmonth;
- int r_wday;
-
- long r_tod; /* time from midnight */
- int r_todisstd; /* above is standard time if TRUE */
- /* or wall clock time if FALSE */
- long r_stdoff; /* offset from standard time */
- const char * r_abbrvar; /* variable part of abbreviation */
-
- int r_todo; /* a rule to do (used in outzone) */
- time_t r_temp; /* used in outzone */
- };
-
- /*
- ** r_dycode r_dayofmonth r_wday
- */
-
- #define DC_DOM 0 /* 1..31 */ /* unused */
- #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
- #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
-
- struct zone {
- const char * z_filename;
- int z_linenum;
-
- const char * z_name;
- long z_gmtoff;
- const char * z_rule;
- const char * z_format;
-
- long z_stdoff;
-
- struct rule * z_rules;
- int z_nrules;
-
- struct rule z_untilrule;
- time_t z_untiltime;
- };
-
- extern int emkdir P((const char * name, int mode));
- extern int getopt P((int argc, char * argv[], const char * options));
- extern char * icatalloc P((char * old, const char * new));
- extern char * icpyalloc P((const char * string));
- extern void ifree P((char * p));
- extern char * imalloc P((int n));
- extern char * irealloc P((char * old, int n));
- extern int link P((const char * fromname, const char * toname));
- extern char * optarg;
- extern int optind;
- extern char * scheck P((const char * string, const char * format));
-
- static void addtt P((time_t starttime, int type));
- static int addtype P((long gmtoff, const char * abbr, int isdst,
- int ttisstd));
- static void addleap P((time_t t, int positive, int rolling));
- static void adjleap P((void));
- static void associate P((void));
- static int ciequal P((const char * ap, const char * bp));
- static void convert P((long val, char * buf));
- static void dolink P((const char * fromfile, const char * tofile));
- static void eat P((const char * name, int num));
- static void eats P((const char * name, int num,
- const char * rname, int rnum));
- static long eitol P((int i));
- static void error P((const char * message));
- static char ** getfields P((char * buf));
- static long gethms P((const char * string, const char * errstrng,
- int signable));
- static void infile P((const char * filename));
- static void inleap P((char ** fields, int nfields));
- static void inlink P((char ** fields, int nfields));
- static void inrule P((char ** fields, int nfields));
- static int inzcont P((char ** fields, int nfields));
- static int inzone P((char ** fields, int nfields));
- static int inzsub P((char ** fields, int nfields, int iscont));
- static int itsabbr P((const char * abbr, const char * word));
- static int itsdir P((const char * name));
- static int lowerit P((int c));
- static char * memcheck P((char * tocheck));
- static int mkdirs P((char * filename));
- static void newabbr P((const char * abbr));
- static long oadd P((long t1, long t2));
- static void outzone P((const struct zone * zp, int ntzones));
- static void puttzcode P((long code, FILE * fp));
- static int rcomp P((const genericptr_t leftp, const genericptr_t rightp));
- static time_t rpytime P((const struct rule * rp, int wantedy));
- static void rulesub P((struct rule * rp,
- char * loyearp, char * hiyearp,
- char * typep, char * monthp,
- char * dayp, char * timep));
- static void setboundaries P((void));
- static time_t tadd P((time_t t1, long t2));
- static void usage P((void));
- static void writezone P((const char * name));
- static int yearistype P((int year, const char * type));
-
- static int charcnt;
- static int errors;
- static const char * filename;
- static int leapcnt;
- static int linenum;
- static time_t max_time;
- static int max_year;
- static time_t min_time;
- static int min_year;
- static int noise;
- static const char * rfilename;
- static int rlinenum;
- static const char * progname;
- static int timecnt;
- static int typecnt;
- static int tt_signed;
-
- /*
- ** Line codes.
- */
-
- #define LC_RULE 0
- #define LC_ZONE 1
- #define LC_LINK 2
- #define LC_LEAP 3
-
- /*
- ** Which fields are which on a Zone line.
- */
-
- #define ZF_NAME 1
- #define ZF_GMTOFF 2
- #define ZF_RULE 3
- #define ZF_FORMAT 4
- #define ZF_TILYEAR 5
- #define ZF_TILMONTH 6
- #define ZF_TILDAY 7
- #define ZF_TILTIME 8
- #define ZONE_MINFIELDS 5
- #define ZONE_MAXFIELDS 9
-
- /*
- ** Which fields are which on a Zone continuation line.
- */
-
- #define ZFC_GMTOFF 0
- #define ZFC_RULE 1
- #define ZFC_FORMAT 2
- #define ZFC_TILYEAR 3
- #define ZFC_TILMONTH 4
- #define ZFC_TILDAY 5
- #define ZFC_TILTIME 6
- #define ZONEC_MINFIELDS 3
- #define ZONEC_MAXFIELDS 7
-
- /*
- ** Which files are which on a Rule line.
- */
-
- #define RF_NAME 1
- #define RF_LOYEAR 2
- #define RF_HIYEAR 3
- #define RF_COMMAND 4
- #define RF_MONTH 5
- #define RF_DAY 6
- #define RF_TOD 7
- #define RF_STDOFF 8
- #define RF_ABBRVAR 9
- #define RULE_FIELDS 10
-
- /*
- ** Which fields are which on a Link line.
- */
-
- #define LF_FROM 1
- #define LF_TO 2
- #define LINK_FIELDS 3
-
- /*
- ** Which fields are which on a Leap line.
- */
-
- #define LP_YEAR 1
- #define LP_MONTH 2
- #define LP_DAY 3
- #define LP_TIME 4
- #define LP_CORR 5
- #define LP_ROLL 6
- #define LEAP_FIELDS 7
-
- /*
- ** Year synonyms.
- */
-
- #define YR_MINIMUM 0
- #define YR_MAXIMUM 1
- #define YR_ONLY 2
-
- static struct rule * rules;
- static int nrules; /* number of rules */
-
- static struct zone * zones;
- static int nzones; /* number of zones */
-
- struct link {
- const char * l_filename;
- int l_linenum;
- const char * l_from;
- const char * l_to;
- };
-
- static struct link * links;
- static int nlinks;
-
- struct lookup {
- const char * l_word;
- const int l_value;
- };
-
- static struct lookup const * byword P((const char * string,
- const struct lookup * lp));
-
- static struct lookup const line_codes[] = {
- "Rule", LC_RULE,
- "Zone", LC_ZONE,
- "Link", LC_LINK,
- "Leap", LC_LEAP,
- NULL, 0
- };
-
- static struct lookup const mon_names[] = {
- "January", TM_JANUARY,
- "February", TM_FEBRUARY,
- "March", TM_MARCH,
- "April", TM_APRIL,
- "May", TM_MAY,
- "June", TM_JUNE,
- "July", TM_JULY,
- "August", TM_AUGUST,
- "September", TM_SEPTEMBER,
- "October", TM_OCTOBER,
- "November", TM_NOVEMBER,
- "December", TM_DECEMBER,
- NULL, 0
- };
-
- static struct lookup const wday_names[] = {
- "Sunday", TM_SUNDAY,
- "Monday", TM_MONDAY,
- "Tuesday", TM_TUESDAY,
- "Wednesday", TM_WEDNESDAY,
- "Thursday", TM_THURSDAY,
- "Friday", TM_FRIDAY,
- "Saturday", TM_SATURDAY,
- NULL, 0
- };
-
- static struct lookup const lasts[] = {
- "last-Sunday", TM_SUNDAY,
- "last-Monday", TM_MONDAY,
- "last-Tuesday", TM_TUESDAY,
- "last-Wednesday", TM_WEDNESDAY,
- "last-Thursday", TM_THURSDAY,
- "last-Friday", TM_FRIDAY,
- "last-Saturday", TM_SATURDAY,
- NULL, 0
- };
-
- static struct lookup const begin_years[] = {
- "minimum", YR_MINIMUM,
- "maximum", YR_MAXIMUM,
- NULL, 0
- };
-
- static struct lookup const end_years[] = {
- "minimum", YR_MINIMUM,
- "maximum", YR_MAXIMUM,
- "only", YR_ONLY,
- NULL, 0
- };
-
- static struct lookup const leap_types[] = {
- "Rolling", TRUE,
- "Stationary", FALSE,
- NULL, 0
- };
-
- static const int len_months[2][MONSPERYEAR] = {
- 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31,
- 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
- };
-
- static const int len_years[2] = {
- DAYSPERNYEAR, DAYSPERLYEAR
- };
-
- static time_t ats[TZ_MAX_TIMES];
- static unsigned char types[TZ_MAX_TIMES];
- static long gmtoffs[TZ_MAX_TYPES];
- static char isdsts[TZ_MAX_TYPES];
- static char abbrinds[TZ_MAX_TYPES];
- static char ttisstds[TZ_MAX_TYPES];
- static char chars[TZ_MAX_CHARS];
- static time_t trans[TZ_MAX_LEAPS];
- static long corr[TZ_MAX_LEAPS];
- static char roll[TZ_MAX_LEAPS];
-
- /*
- ** Memory allocation.
- */
-
- static char *
- memcheck(ptr)
- char * const ptr;
- {
- if (ptr == NULL) {
- (void) perror(progname);
- (void) exit(EXIT_FAILURE);
- }
- return ptr;
- }
-
- #define emalloc(size) memcheck(imalloc(size))
- #define erealloc(ptr, size) memcheck(irealloc(ptr, size))
- #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
- #define ecatalloc(oldp, newp) memcheck(icatalloc(oldp, newp))
-
- /*
- ** Error handling.
- */
-
- static void
- eats(name, num, rname, rnum)
- const char * const name;
- const int num;
- const char * const rname;
- const int rnum;
- {
- filename = name;
- linenum = num;
- rfilename = rname;
- rlinenum = rnum;
- }
-
- static void
- eat(name, num)
- const char * const name;
- const int num;
- {
- eats(name, num, (char *) NULL, -1);
- }
-
- static void
- error(string)
- const char * const string;
- {
- /*
- ** Match the format of "cc" to allow sh users to
- ** zic ... 2>&1 | error -t "*" -v
- ** on BSD systems.
- */
- (void) fprintf(stderr, "\"%s\", line %d: %s",
- filename, linenum, string);
- if (rfilename != NULL)
- (void) fprintf(stderr, " (rule from \"%s\", line %d)",
- rfilename, rlinenum);
- (void) fprintf(stderr, "\n");
- ++errors;
- }
-
- static void
- usage()
- {
- (void) fprintf(stderr,
- "%s: usage is %s [ -s ] [ -v ] [ -l localtime ] [ -p posixrules ] [ -d directory ]\n\
- \t[ -L leapseconds ] [ filename ... ]\n",
- progname, progname);
- (void) exit(EXIT_FAILURE);
- }
-
- static const char * psxrules;
- static const char * lcltime;
- static const char * directory;
- static const char * leapsec;
- static int sflag = FALSE;
-
- int
- main(argc, argv)
- int argc;
- char * argv[];
- {
- register int i, j;
- register int c;
-
- #ifdef unix
- (void) umask(umask(022) | 022);
- #endif /* defined unix */
- progname = argv[0];
- while ((c = getopt(argc, argv, "d:l:p:L:vs")) != EOF)
- switch (c) {
- default:
- usage();
- case 'd':
- if (directory == NULL)
- directory = optarg;
- else {
- (void) fprintf(stderr,
- "%s: More than one -d option specified\n",
- progname);
- (void) exit(EXIT_FAILURE);
- }
- break;
- case 'l':
- if (lcltime == NULL)
- lcltime = optarg;
- else {
- (void) fprintf(stderr,
- "%s: More than one -l option specified\n",
- progname);
- (void) exit(EXIT_FAILURE);
- }
- break;
- case 'p':
- if (psxrules == NULL)
- psxrules = optarg;
- else {
- (void) fprintf(stderr,
- "%s: More than one -p option specified\n",
- progname);
- (void) exit(EXIT_FAILURE);
- }
- break;
- case 'L':
- if (leapsec == NULL)
- leapsec = optarg;
- else {
- (void) fprintf(stderr,
- "%s: More than one -L option specified\n",
- progname);
- (void) exit(EXIT_FAILURE);
- }
- break;
- case 'v':
- noise = TRUE;
- break;
- case 's':
- sflag = TRUE;
- break;
- }
- if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
- usage(); /* usage message by request */
- if (directory == NULL)
- directory = TZDIR;
-
- setboundaries();
-
- if (optind < argc && leapsec != NULL) {
- infile(leapsec);
- adjleap();
- }
-
- zones = (struct zone *) emalloc(0);
- rules = (struct rule *) emalloc(0);
- links = (struct link *) emalloc(0);
- for (i = optind; i < argc; ++i)
- infile(argv[i]);
- if (errors)
- (void) exit(EXIT_FAILURE);
- associate();
- for (i = 0; i < nzones; i = j) {
- /*
- ** Find the next non-continuation zone entry.
- */
- for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
- ;
- outzone(&zones[i], j - i);
- }
- /*
- ** Make links.
- */
- for (i = 0; i < nlinks; ++i)
- dolink(links[i].l_from, links[i].l_to);
- if (lcltime != NULL)
- dolink(lcltime, TZDEFAULT);
- if (psxrules != NULL)
- dolink(psxrules, TZDEFRULES);
- return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
- }
-
- static void
- dolink(fromfile, tofile)
- const char * const fromfile;
- const char * const tofile;
- {
- register char * fromname;
- register char * toname;
-
- fromname = ecpyalloc(directory);
- fromname = ecatalloc(fromname, "/");
- fromname = ecatalloc(fromname, fromfile);
- toname = ecpyalloc(directory);
- toname = ecatalloc(toname, "/");
- toname = ecatalloc(toname, tofile);
- /*
- ** We get to be careful here since
- ** there's a fair chance of root running us.
- */
- if (!itsdir(toname))
- (void) remove(toname);
- if (link(fromname, toname) != 0) {
- (void) fprintf(stderr, "%s: Can't link from %s to ",
- progname, fromname);
- (void) perror(toname);
- (void) exit(EXIT_FAILURE);
- }
- ifree(fromname);
- ifree(toname);
- }
-
- static void
- setboundaries()
- {
- register time_t bit;
-
- for (bit = 1; bit > 0; bit <<= 1)
- ;
- if (bit == 0) { /* time_t is an unsigned type */
- tt_signed = FALSE;
- min_time = 0;
- max_time = ~(time_t) 0;
- if (sflag)
- max_time >>= 1;
- } else {
- tt_signed = TRUE;
- min_time = bit;
- max_time = bit;
- ++max_time;
- max_time = -max_time;
- if (sflag)
- min_time = 0;
- }
- min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
- max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
- }
-
- static int
- itsdir(name)
- const char * const name;
- {
- register char * myname;
- register int accres;
-
- myname = ecpyalloc(name);
- myname = ecatalloc(myname, "/.");
- accres = access(myname, 0);
- ifree(myname);
- return accres == 0;
- }
-
- /*
- ** Associate sets of rules with zones.
- */
-
- /*
- ** Sort by rule name.
- */
-
- static int
- rcomp(cp1, cp2)
- const genericptr_t cp1;
- const genericptr_t cp2;
- {
- return strcmp(((struct rule *) cp1)->r_name,
- ((struct rule *) cp2)->r_name);
- }
-
- static void
- associate()
- {
- register struct zone * zp;
- register struct rule * rp;
- register int base, out;
- register int i;
-
- if (nrules != 0)
- (void) qsort((genericptr_t) rules,
- (qsort_size_t) nrules,
- (qsort_size_t) sizeof *rules, rcomp);
- for (i = 0; i < nzones; ++i) {
- zp = &zones[i];
- zp->z_rules = NULL;
- zp->z_nrules = 0;
- }
- for (base = 0; base < nrules; base = out) {
- rp = &rules[base];
- for (out = base + 1; out < nrules; ++out)
- if (strcmp(rp->r_name, rules[out].r_name) != 0)
- break;
- for (i = 0; i < nzones; ++i) {
- zp = &zones[i];
- if (strcmp(zp->z_rule, rp->r_name) != 0)
- continue;
- zp->z_rules = rp;
- zp->z_nrules = out - base;
- }
- }
- for (i = 0; i < nzones; ++i) {
- zp = &zones[i];
- if (zp->z_nrules == 0) {
- /*
- ** Maybe we have a local standard time offset.
- */
- eat(zp->z_filename, zp->z_linenum);
- zp->z_stdoff = gethms(zp->z_rule, "unruly zone", TRUE);
- /*
- ** Note, though, that if there's no rule,
- ** a '%s' in the format is a bad thing.
- */
- if (strchr(zp->z_format, '%') != 0)
- error("%s in ruleless zone");
- }
- }
- if (errors)
- (void) exit(EXIT_FAILURE);
- }
-
- static void
- infile(name)
- const char * name;
- {
- register FILE * fp;
- register char ** fields;
- register char * cp;
- register const struct lookup * lp;
- register int nfields;
- register int wantcont;
- register int num;
- char buf[BUFSIZ];
-
- if (strcmp(name, "-") == 0) {
- name = "standard input";
- fp = stdin;
- } else if ((fp = fopen(name, "r")) == NULL) {
- (void) fprintf(stderr, "%s: Can't open ", progname);
- (void) perror(name);
- (void) exit(EXIT_FAILURE);
- }
- wantcont = FALSE;
- for (num = 1; ; ++num) {
- eat(name, num);
- if (fgets(buf, (int) sizeof buf, fp) != buf)
- break;
- cp = strchr(buf, '\n');
- if (cp == NULL) {
- error("line too long");
- (void) exit(EXIT_FAILURE);
- }
- *cp = '\0';
- fields = getfields(buf);
- nfields = 0;
- while (fields[nfields] != NULL) {
- if (ciequal(fields[nfields], "-"))
- fields[nfields] = "";
- ++nfields;
- }
- if (nfields == 0) {
- /* nothing to do */
- } else if (wantcont) {
- wantcont = inzcont(fields, nfields);
- } else {
- lp = byword(fields[0], line_codes);
- if (lp == NULL)
- error("input line of unknown type");
- else switch ((int) (lp->l_value)) {
- case LC_RULE:
- inrule(fields, nfields);
- wantcont = FALSE;
- break;
- case LC_ZONE:
- wantcont = inzone(fields, nfields);
- break;
- case LC_LINK:
- inlink(fields, nfields);
- wantcont = FALSE;
- break;
- case LC_LEAP:
- if (name != leapsec)
- (void) fprintf(stderr,
- "%s: Leap line in non leap seconds file %s\n",
- progname, name);
- else inleap(fields, nfields);
- wantcont = FALSE;
- break;
- default: /* "cannot happen" */
- (void) fprintf(stderr,
- "%s: panic: Invalid l_value %d\n",
- progname, lp->l_value);
- (void) exit(EXIT_FAILURE);
- }
- }
- ifree((char *) fields);
- }
- if (ferror(fp)) {
- (void) fprintf(stderr, "%s: Error reading ", progname);
- (void) perror(filename);
- (void) exit(EXIT_FAILURE);
- }
- if (fp != stdin && fclose(fp)) {
- (void) fprintf(stderr, "%s: Error closing ", progname);
- (void) perror(filename);
- (void) exit(EXIT_FAILURE);
- }
- if (wantcont)
- error("expected continuation line not found");
- }
-
- /*
- ** Convert a string of one of the forms
- ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
- ** into a number of seconds.
- ** A null string maps to zero.
- ** Call error with errstring and return zero on errors.
- */
-
- static long
- gethms(string, errstring, signable)
- const char * string;
- const char * const errstring;
- const int signable;
- {
- int hh, mm, ss, sign;
-
- if (string == NULL || *string == '\0')
- return 0;
- if (!signable)
- sign = 1;
- else if (*string == '-') {
- sign = -1;
- ++string;
- } else sign = 1;
- if (sscanf(string, scheck(string, "%d"), &hh) == 1)
- mm = ss = 0;
- else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
- ss = 0;
- else if (sscanf(string, scheck(string, "%d:%d:%d"),
- &hh, &mm, &ss) != 3) {
- error(errstring);
- return 0;
- }
- if (hh < 0 || hh >= HOURSPERDAY ||
- mm < 0 || mm >= MINSPERHOUR ||
- ss < 0 || ss > SECSPERMIN) {
- error(errstring);
- return 0;
- }
- return eitol(sign) *
- (eitol(hh * MINSPERHOUR + mm) *
- eitol(SECSPERMIN) + eitol(ss));
- }
-
- static void
- inrule(fields, nfields)
- register char ** const fields;
- const int nfields;
- {
- static struct rule r;
-
- if (nfields != RULE_FIELDS) {
- error("wrong number of fields on Rule line");
- return;
- }
- if (*fields[RF_NAME] == '\0') {
- error("nameless rule");
- return;
- }
- r.r_filename = filename;
- r.r_linenum = linenum;
- r.r_stdoff = gethms(fields[RF_STDOFF], "invalid saved time", TRUE);
- rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
- fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
- r.r_name = ecpyalloc(fields[RF_NAME]);
- r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
- rules = (struct rule *) erealloc((char *) rules,
- (int) ((nrules + 1) * sizeof *rules));
- rules[nrules++] = r;
- }
-
- static int
- inzone(fields, nfields)
- register char ** const fields;
- const int nfields;
- {
- register int i;
- char buf[132];
-
- if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
- error("wrong number of fields on Zone line");
- return FALSE;
- }
- if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
- (void) sprintf(buf,
- "\"Zone %s\" line and -l option are mutually exclusive",
- TZDEFAULT);
- error(buf);
- return FALSE;
- }
- if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
- (void) sprintf(buf,
- "\"Zone %s\" line and -p option are mutually exclusive",
- TZDEFRULES);
- error(buf);
- return FALSE;
- }
- for (i = 0; i < nzones; ++i)
- if (zones[i].z_name != NULL &&
- strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
- (void) sprintf(buf,
- "duplicate zone name %s (file \"%s\", line %d)",
- fields[ZF_NAME],
- zones[i].z_filename,
- zones[i].z_linenum);
- error(buf);
- return FALSE;
- }
- return inzsub(fields, nfields, FALSE);
- }
-
- static int
- inzcont(fields, nfields)
- register char ** const fields;
- const int nfields;
- {
- if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
- error("wrong number of fields on Zone continuation line");
- return FALSE;
- }
- return inzsub(fields, nfields, TRUE);
- }
-
- static int
- inzsub(fields, nfields, iscont)
- register char ** const fields;
- const int nfields;
- const int iscont;
- {
- register char * cp;
- static struct zone z;
- register int i_gmtoff, i_rule, i_format;
- register int i_untilyear, i_untilmonth;
- register int i_untilday, i_untiltime;
- register int hasuntil;
-
- if (iscont) {
- i_gmtoff = ZFC_GMTOFF;
- i_rule = ZFC_RULE;
- i_format = ZFC_FORMAT;
- i_untilyear = ZFC_TILYEAR;
- i_untilmonth = ZFC_TILMONTH;
- i_untilday = ZFC_TILDAY;
- i_untiltime = ZFC_TILTIME;
- z.z_name = NULL;
- } else {
- i_gmtoff = ZF_GMTOFF;
- i_rule = ZF_RULE;
- i_format = ZF_FORMAT;
- i_untilyear = ZF_TILYEAR;
- i_untilmonth = ZF_TILMONTH;
- i_untilday = ZF_TILDAY;
- i_untiltime = ZF_TILTIME;
- z.z_name = ecpyalloc(fields[ZF_NAME]);
- }
- z.z_filename = filename;
- z.z_linenum = linenum;
- z.z_gmtoff = gethms(fields[i_gmtoff], "invalid GMT offset", TRUE);
- if ((cp = strchr(fields[i_format], '%')) != 0) {
- if (*++cp != 's' || strchr(cp, '%') != 0) {
- error("invalid abbreviation format");
- return FALSE;
- }
- }
- z.z_rule = ecpyalloc(fields[i_rule]);
- z.z_format = ecpyalloc(fields[i_format]);
- hasuntil = nfields > i_untilyear;
- if (hasuntil) {
- z.z_untilrule.r_filename = filename;
- z.z_untilrule.r_linenum = linenum;
- rulesub(&z.z_untilrule,
- fields[i_untilyear],
- "only",
- "",
- (nfields > i_untilmonth) ? fields[i_untilmonth] : "Jan",
- (nfields > i_untilday) ? fields[i_untilday] : "1",
- (nfields > i_untiltime) ? fields[i_untiltime] : "0");
- z.z_untiltime = rpytime(&z.z_untilrule, z.z_untilrule.r_loyear);
- if (iscont && nzones > 0 && z.z_untiltime < max_time &&
- z.z_untiltime > min_time &&
- zones[nzones - 1].z_untiltime >= z.z_untiltime) {
- error("Zone continuation line end time is not after end time of previous line");
- return FALSE;
- }
- }
- zones = (struct zone *) erealloc((char *) zones,
- (int) ((nzones + 1) * sizeof *zones));
- zones[nzones++] = z;
- /*
- ** If there was an UNTIL field on this line,
- ** there's more information about the zone on the next line.
- */
- return hasuntil;
- }
-
- static void
- inleap(fields, nfields)
- register char ** const fields;
- const int nfields;
- {
- register const char * cp;
- register const struct lookup * lp;
- register int i, j;
- int year, month, day;
- long dayoff, tod;
- time_t t;
-
- if (nfields != LEAP_FIELDS) {
- error("wrong number of fields on Leap line");
- return;
- }
- dayoff = 0;
- cp = fields[LP_YEAR];
- if (sscanf(cp, scheck(cp, "%d"), &year) != 1 ||
- year < min_year || year > max_year) {
- /*
- * Leapin' Lizards!
- */
- error("invalid leaping year");
- return;
- }
- j = EPOCH_YEAR;
- while (j != year) {
- if (year > j) {
- i = len_years[isleap(j)];
- ++j;
- } else {
- --j;
- i = -len_years[isleap(j)];
- }
- dayoff = oadd(dayoff, eitol(i));
- }
- if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
- error("invalid month name");
- return;
- }
- month = lp->l_value;
- j = TM_JANUARY;
- while (j != month) {
- i = len_months[isleap(year)][j];
- dayoff = oadd(dayoff, eitol(i));
- ++j;
- }
- cp = fields[LP_DAY];
- if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
- day <= 0 || day > len_months[isleap(year)][month]) {
- error("invalid day of month");
- return;
- }
- dayoff = oadd(dayoff, eitol(day - 1));
- if (dayoff < 0 && !tt_signed) {
- error("time before zero");
- return;
- }
- t = (time_t) dayoff * SECSPERDAY;
- /*
- ** Cheap overflow check.
- */
- if (t / SECSPERDAY != dayoff) {
- error("time overflow");
- return;
- }
- tod = gethms(fields[LP_TIME], "invalid time of day", FALSE);
- cp = fields[LP_CORR];
- if (strcmp(cp, "+") != 0 && strcmp(cp, "") != 0) {
- /* infile() turned "-" into "" */
- error("illegal CORRECTION field on Leap line");
- return;
- }
- if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
- error("illegal Rolling/Stationary field on Leap line");
- return;
- }
- addleap(tadd(t, tod), *cp == '+', lp->l_value);
- }
-
- static void
- inlink(fields, nfields)
- register char ** const fields;
- const int nfields;
- {
- struct link l;
-
- if (nfields != LINK_FIELDS) {
- error("wrong number of fields on Link line");
- return;
- }
- if (*fields[LF_FROM] == '\0') {
- error("blank FROM field on Link line");
- return;
- }
- if (*fields[LF_TO] == '\0') {
- error("blank TO field on Link line");
- return;
- }
- l.l_filename = filename;
- l.l_linenum = linenum;
- l.l_from = ecpyalloc(fields[LF_FROM]);
- l.l_to = ecpyalloc(fields[LF_TO]);
- links = (struct link *) erealloc((char *) links,
- (int) ((nlinks + 1) * sizeof *links));
- links[nlinks++] = l;
- }
-
- static void
- rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
- register struct rule * const rp;
- char * const loyearp;
- char * const hiyearp;
- char * const typep;
- char * const monthp;
- char * const dayp;
- char * const timep;
- {
- register struct lookup const * lp;
- register char * cp;
-
- if ((lp = byword(monthp, mon_names)) == NULL) {
- error("invalid month name");
- return;
- }
- rp->r_month = lp->l_value;
- rp->r_todisstd = FALSE;
- cp = timep;
- if (*cp != '\0') {
- cp += strlen(cp) - 1;
- switch (lowerit(*cp)) {
- case 's':
- rp->r_todisstd = TRUE;
- *cp = '\0';
- break;
- case 'w':
- rp->r_todisstd = FALSE;
- *cp = '\0';
- break;
- }
- }
- rp->r_tod = gethms(timep, "invalid time of day", FALSE);
- /*
- ** Year work.
- */
- cp = loyearp;
- if ((lp = byword(cp, begin_years)) != NULL) switch ((int) lp->l_value) {
- case YR_MINIMUM:
- rp->r_loyear = min_year;
- break;
- case YR_MAXIMUM:
- rp->r_loyear = max_year;
- break;
- default: /* "cannot happen" */
- (void) fprintf(stderr,
- "%s: panic: Invalid l_value %d\n",
- progname, lp->l_value);
- (void) exit(EXIT_FAILURE);
- } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1 ||
- rp->r_loyear < min_year || rp->r_loyear > max_year) {
- if (noise)
- error("invalid starting year");
- if (rp->r_loyear > max_year)
- return;
- }
- cp = hiyearp;
- if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
- case YR_MINIMUM:
- rp->r_hiyear = min_year;
- break;
- case YR_MAXIMUM:
- rp->r_hiyear = max_year;
- break;
- case YR_ONLY:
- rp->r_hiyear = rp->r_loyear;
- break;
- default: /* "cannot happen" */
- (void) fprintf(stderr,
- "%s: panic: Invalid l_value %d\n",
- progname, lp->l_value);
- (void) exit(EXIT_FAILURE);
- } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1 ||
- rp->r_hiyear < min_year || rp->r_hiyear > max_year) {
- if (noise)
- error("invalid ending year");
- if (rp->r_hiyear < min_year)
- return;
- }
- if (rp->r_hiyear < min_year)
- return;
- if (rp->r_loyear < min_year)
- rp->r_loyear = min_year;
- if (rp->r_hiyear > max_year)
- rp->r_hiyear = max_year;
- if (rp->r_loyear > rp->r_hiyear) {
- error("starting year greater than ending year");
- return;
- }
- if (*typep == '\0')
- rp->r_yrtype = NULL;
- else {
- if (rp->r_loyear == rp->r_hiyear) {
- error("typed single year");
- return;
- }
- rp->r_yrtype = ecpyalloc(typep);
- }
- /*
- ** Day work.
- ** Accept things such as:
- ** 1
- ** last-Sunday
- ** Sun<=20
- ** Sun>=7
- */
- if ((lp = byword(dayp, lasts)) != NULL) {
- rp->r_dycode = DC_DOWLEQ;
- rp->r_wday = lp->l_value;
- rp->r_dayofmonth = len_months[1][rp->r_month];
- } else {
- if ((cp = strchr(dayp, '<')) != 0)
- rp->r_dycode = DC_DOWLEQ;
- else if ((cp = strchr(dayp, '>')) != 0)
- rp->r_dycode = DC_DOWGEQ;
- else {
- cp = dayp;
- rp->r_dycode = DC_DOM;
- }
- if (rp->r_dycode != DC_DOM) {
- *cp++ = 0;
- if (*cp++ != '=') {
- error("invalid day of month");
- return;
- }
- if ((lp = byword(dayp, wday_names)) == NULL) {
- error("invalid weekday name");
- return;
- }
- rp->r_wday = lp->l_value;
- }
- if (sscanf(cp, scheck(cp, "%d"), &rp->r_dayofmonth) != 1 ||
- rp->r_dayofmonth <= 0 ||
- (rp->r_dayofmonth > len_months[1][rp->r_month])) {
- error("invalid day of month");
- return;
- }
- }
- }
-
- static void
- convert(val, buf)
- const long val;
- char * const buf;
- {
- register int i;
- register long shift;
-
- for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
- buf[i] = val >> shift;
- }
-
- static void
- puttzcode(val, fp)
- const long val;
- FILE * const fp;
- {
- char buf[4];
-
- convert(val, buf);
- (void) fwrite((genericptr_t) buf,
- (fwrite_size_t) sizeof buf,
- (fwrite_size_t) 1, fp);
- }
-
- static void
- writezone(name)
- const char * const name;
- {
- register FILE * fp;
- register int i, j;
- char fullname[BUFSIZ];
- static struct tzhead tzh;
-
- if (strlen(directory) + 1 + strlen(name) >= sizeof fullname) {
- (void) fprintf(stderr,
- "%s: File name %s/%s too long\n", progname,
- directory, name);
- (void) exit(EXIT_FAILURE);
- }
- (void) sprintf(fullname, "%s/%s", directory, name);
- if ((fp = fopen(fullname, "wb")) == NULL) {
- if (mkdirs(fullname) != 0)
- (void) exit(EXIT_FAILURE);
- if ((fp = fopen(fullname, "wb")) == NULL) {
- (void) fprintf(stderr, "%s: Can't create ", progname);
- (void) perror(fullname);
- (void) exit(EXIT_FAILURE);
- }
- }
- convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
- convert(eitol(leapcnt), tzh.tzh_leapcnt);
- convert(eitol(timecnt), tzh.tzh_timecnt);
- convert(eitol(typecnt), tzh.tzh_typecnt);
- convert(eitol(charcnt), tzh.tzh_charcnt);
- (void) fwrite((genericptr_t) &tzh,
- (fwrite_size_t) sizeof tzh,
- (fwrite_size_t) 1, fp);
- for (i = 0; i < timecnt; ++i) {
- j = leapcnt;
- while (--j >= 0)
- if (ats[i] >= trans[j]) {
- ats[i] = tadd(ats[i], corr[j]);
- break;
- }
- puttzcode((long) ats[i], fp);
- }
- if (timecnt > 0)
- (void) fwrite((genericptr_t) types,
- (fwrite_size_t) sizeof types[0],
- (fwrite_size_t) timecnt, fp);
- for (i = 0; i < typecnt; ++i) {
- puttzcode((long) gmtoffs[i], fp);
- (void) putc(isdsts[i], fp);
- (void) putc(abbrinds[i], fp);
- }
- if (charcnt != 0)
- (void) fwrite((genericptr_t) chars,
- (fwrite_size_t) sizeof chars[0],
- (fwrite_size_t) charcnt, fp);
- for (i = 0; i < leapcnt; ++i) {
- if (roll[i]) {
- if (timecnt == 0 || trans[i] < ats[0]) {
- j = 0;
- while (isdsts[j])
- if (++j >= typecnt) {
- j = 0;
- break;
- }
- } else {
- j = 1;
- while (j < timecnt && trans[i] >= ats[j])
- ++j;
- j = types[j - 1];
- }
- puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
- } else puttzcode((long) trans[i], fp);
- puttzcode((long) corr[i], fp);
- }
- for (i = 0; i < typecnt; ++i)
- (void) putc(ttisstds[i], fp);
- if (ferror(fp) || fclose(fp)) {
- (void) fprintf(stderr, "%s: Write error on ", progname);
- (void) perror(fullname);
- (void) exit(EXIT_FAILURE);
- }
- }
-
- static void
- outzone(zpfirst, zonecount)
- const struct zone * const zpfirst;
- const int zonecount;
- {
- register const struct zone * zp;
- register struct rule * rp;
- register int i, j;
- register int usestart, useuntil;
- register time_t starttime, untiltime;
- register long gmtoff;
- register long stdoff;
- register int year;
- register long startoff;
- register int startisdst;
- register int startttisstd;
- register int type;
- char startbuf[BUFSIZ];
-
- /*
- ** Now. . .finally. . .generate some useful data!
- */
- timecnt = 0;
- typecnt = 0;
- charcnt = 0;
- /*
- ** Two guesses. . .the second may well be corrected later.
- */
- gmtoff = zpfirst->z_gmtoff;
- stdoff = 0;
- #ifdef lint
- starttime = 0;
- startttisstd = FALSE;
- #endif /* defined lint */
- for (i = 0; i < zonecount; ++i) {
- usestart = i > 0;
- useuntil = i < (zonecount - 1);
- zp = &zpfirst[i];
- eat(zp->z_filename, zp->z_linenum);
- startisdst = -1;
- if (zp->z_nrules == 0) {
- type = addtype(oadd(zp->z_gmtoff, zp->z_stdoff),
- zp->z_format, zp->z_stdoff != 0,
- startttisstd);
- if (usestart)
- addtt(starttime, type);
- gmtoff = zp->z_gmtoff;
- stdoff = zp->z_stdoff;
- } else for (year = min_year; year <= max_year; ++year) {
- if (useuntil && year > zp->z_untilrule.r_hiyear)
- break;
- /*
- ** Mark which rules to do in the current year.
- ** For those to do, calculate rpytime(rp, year);
- */
- for (j = 0; j < zp->z_nrules; ++j) {
- rp = &zp->z_rules[j];
- eats(zp->z_filename, zp->z_linenum,
- rp->r_filename, rp->r_linenum);
- rp->r_todo = year >= rp->r_loyear &&
- year <= rp->r_hiyear &&
- yearistype(year, rp->r_yrtype);
- if (rp->r_todo)
- rp->r_temp = rpytime(rp, year);
- }
- for ( ; ; ) {
- register int k;
- register time_t jtime, ktime;
- register long offset;
- char buf[BUFSIZ];
-
- if (useuntil) {
- /*
- ** Turn untiltime into GMT
- ** assuming the current gmtoff and
- ** stdoff values.
- */
- offset = gmtoff;
- if (!zp->z_untilrule.r_todisstd)
- offset = oadd(offset, stdoff);
- untiltime = tadd(zp->z_untiltime,
- -offset);
- }
- /*
- ** Find the rule (of those to do, if any)
- ** that takes effect earliest in the year.
- */
- k = -1;
- #ifdef lint
- ktime = 0;
- #endif /* defined lint */
- for (j = 0; j < zp->z_nrules; ++j) {
- rp = &zp->z_rules[j];
- if (!rp->r_todo)
- continue;
- eats(zp->z_filename, zp->z_linenum,
- rp->r_filename, rp->r_linenum);
- offset = gmtoff;
- if (!rp->r_todisstd)
- offset = oadd(offset, stdoff);
- jtime = rp->r_temp;
- if (jtime == min_time ||
- jtime == max_time)
- continue;
- jtime = tadd(jtime, -offset);
- if (k < 0 || jtime < ktime) {
- k = j;
- ktime = jtime;
- }
- }
- if (k < 0)
- break; /* go on to next year */
- rp = &zp->z_rules[k];
- rp->r_todo = FALSE;
- if (useuntil && ktime >= untiltime)
- break;
- if (usestart) {
- if (ktime < starttime) {
- stdoff = rp->r_stdoff;
- startoff = oadd(zp->z_gmtoff,
- rp->r_stdoff);
- (void) sprintf(startbuf,
- zp->z_format,
- rp->r_abbrvar);
- startisdst =
- rp->r_stdoff != 0;
- continue;
- }
- if (ktime != starttime &&
- startisdst >= 0)
- addtt(starttime, addtype(startoff, startbuf, startisdst, startttisstd));
- usestart = FALSE;
- }
- eats(zp->z_filename, zp->z_linenum,
- rp->r_filename, rp->r_linenum);
- (void) sprintf(buf, zp->z_format,
- rp->r_abbrvar);
- offset = oadd(zp->z_gmtoff, rp->r_stdoff);
- type = addtype(offset, buf, rp->r_stdoff != 0,
- rp->r_todisstd);
- if (timecnt != 0 || rp->r_stdoff != 0)
- addtt(ktime, type);
- gmtoff = zp->z_gmtoff;
- stdoff = rp->r_stdoff;
- }
- }
- /*
- ** Now we may get to set starttime for the next zone line.
- */
- if (useuntil) {
- starttime = tadd(zp->z_untiltime,
- -gmtoffs[types[timecnt - 1]]);
- startttisstd = zp->z_untilrule.r_todisstd;
- }
- }
- writezone(zpfirst->z_name);
- }
-
- static void
- addtt(starttime, type)
- const time_t starttime;
- const int type;
- {
- if (timecnt != 0 && type == types[timecnt - 1])
- return; /* easy enough! */
- if (timecnt >= TZ_MAX_TIMES) {
- error("too many transitions?!");
- (void) exit(EXIT_FAILURE);
- }
- ats[timecnt] = starttime;
- types[timecnt] = type;
- ++timecnt;
- }
-
- static int
- addtype(gmtoff, abbr, isdst, ttisstd)
- const long gmtoff;
- const char * const abbr;
- const int isdst;
- const int ttisstd;
- {
- register int i, j;
-
- /*
- ** See if there's already an entry for this zone type.
- ** If so, just return its index.
- */
- for (i = 0; i < typecnt; ++i) {
- if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
- strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
- ttisstd == ttisstds[i])
- return i;
- }
- /*
- ** There isn't one; add a new one, unless there are already too
- ** many.
- */
- if (typecnt >= TZ_MAX_TYPES) {
- error("too many local time types");
- (void) exit(EXIT_FAILURE);
- }
- gmtoffs[i] = gmtoff;
- isdsts[i] = isdst;
- ttisstds[i] = ttisstd;
-
- for (j = 0; j < charcnt; ++j)
- if (strcmp(&chars[j], abbr) == 0)
- break;
- if (j == charcnt)
- newabbr(abbr);
- abbrinds[i] = j;
- ++typecnt;
- return i;
- }
-
- static void
- addleap(t, positive, rolling)
- const time_t t;
- const int positive;
- const int rolling;
- {
- register int i, j;
-
- if (leapcnt >= TZ_MAX_LEAPS) {
- error("too many leap seconds");
- (void) exit(EXIT_FAILURE);
- }
- for (i = 0; i < leapcnt; ++i)
- if (t <= trans[i]) {
- if (t == trans[i]) {
- error("repeated leap second moment");
- (void) exit(EXIT_FAILURE);
- }
- break;
- }
- for (j = leapcnt; j > i; --j) {
- trans[j] = trans[j-1];
- corr[j] = corr[j-1];
- roll[j] = roll[j-1];
- }
- trans[i] = t;
- corr[i] = (positive ? 1L : -1L);
- roll[i] = rolling;
- ++leapcnt;
- }
-
- static void
- adjleap()
- {
- register int i;
- register long last = 0;
-
- /*
- ** propagate leap seconds forward
- */
- for (i = 0; i < leapcnt; ++i) {
- trans[i] = tadd(trans[i], last);
- last = corr[i] += last;
- }
- }
-
- static int
- yearistype(year, type)
- const int year;
- const char * const type;
- {
- char buf[BUFSIZ];
- int result;
-
- if (type == NULL || *type == '\0')
- return TRUE;
- if (strcmp(type, "uspres") == 0)
- return (year % 4) == 0;
- if (strcmp(type, "nonpres") == 0)
- return (year % 4) != 0;
- (void) sprintf(buf, "yearistype %d %s", year, type);
- result = system(buf);
- if (result == 0)
- return TRUE;
- if (result == (1 << 8))
- return FALSE;
- error("Wild result from command execution");
- (void) fprintf(stderr, "%s: command was '%s', result was %d\n",
- progname, buf, result);
- for ( ; ; )
- (void) exit(EXIT_FAILURE);
- }
-
- static int
- lowerit(a)
- const int a;
- {
- return (isascii(a) && isupper(a)) ? tolower(a) : a;
- }
-
- static int
- ciequal(ap, bp) /* case-insensitive equality */
- register const char * ap;
- register const char * bp;
- {
- while (lowerit(*ap) == lowerit(*bp++))
- if (*ap++ == '\0')
- return TRUE;
- return FALSE;
- }
-
- static int
- itsabbr(abbr, word)
- register const char * abbr;
- register const char * word;
- {
- if (lowerit(*abbr) != lowerit(*word))
- return FALSE;
- ++word;
- while (*++abbr != '\0')
- do if (*word == '\0')
- return FALSE;
- while (lowerit(*word++) != lowerit(*abbr));
- return TRUE;
- }
-
- static const struct lookup *
- byword(word, table)
- register const char * const word;
- register const struct lookup * const table;
- {
- register const struct lookup * foundlp;
- register const struct lookup * lp;
-
- if (word == NULL || table == NULL)
- return NULL;
- /*
- ** Look for exact match.
- */
- for (lp = table; lp->l_word != NULL; ++lp)
- if (ciequal(word, lp->l_word))
- return lp;
- /*
- ** Look for inexact match.
- */
- foundlp = NULL;
- for (lp = table; lp->l_word != NULL; ++lp)
- if (itsabbr(word, lp->l_word))
- if (foundlp == NULL)
- foundlp = lp;
- else return NULL; /* multiple inexact matches */
- return foundlp;
- }
-
- static char **
- getfields(cp)
- register char * cp;
- {
- register char * dp;
- register char ** array;
- register int nsubs;
-
- if (cp == NULL)
- return NULL;
- array = (char **) emalloc((int) ((strlen(cp) + 1) * sizeof *array));
- nsubs = 0;
- for ( ; ; ) {
- while (isascii(*cp) && isspace(*cp))
- ++cp;
- if (*cp == '\0' || *cp == '#')
- break;
- array[nsubs++] = dp = cp;
- do {
- if ((*dp = *cp++) != '"')
- ++dp;
- else while ((*dp = *cp++) != '"')
- if (*dp != '\0')
- ++dp;
- else error("Odd number of quotation marks");
- } while (*cp != '\0' && *cp != '#' &&
- (!isascii(*cp) || !isspace(*cp)));
- if (isascii(*cp) && isspace(*cp))
- ++cp;
- *dp = '\0';
- }
- array[nsubs] = NULL;
- return array;
- }
-
- static long
- oadd(t1, t2)
- const long t1;
- const long t2;
- {
- register long t;
-
- t = t1 + t2;
- if (t2 > 0 && t <= t1 || t2 < 0 && t >= t1) {
- error("time overflow");
- (void) exit(EXIT_FAILURE);
- }
- return t;
- }
-
- static time_t
- tadd(t1, t2)
- const time_t t1;
- const long t2;
- {
- register time_t t;
-
- if (t1 == max_time && t2 > 0)
- return max_time;
- if (t1 == min_time && t2 < 0)
- return min_time;
- t = t1 + t2;
- if (t2 > 0 && t <= t1 || t2 < 0 && t >= t1) {
- error("time overflow");
- (void) exit(EXIT_FAILURE);
- }
- return t;
- }
-
- /*
- ** Given a rule, and a year, compute the date - in seconds since January 1,
- ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
- */
-
- static time_t
- rpytime(rp, wantedy)
- register const struct rule * const rp;
- register const int wantedy;
- {
- register int y, m, i;
- register long dayoff; /* with a nod to Margaret O. */
- register time_t t;
-
- dayoff = 0;
- m = TM_JANUARY;
- y = EPOCH_YEAR;
- while (wantedy != y) {
- if (wantedy > y) {
- i = len_years[isleap(y)];
- ++y;
- } else {
- --y;
- i = -len_years[isleap(y)];
- }
- dayoff = oadd(dayoff, eitol(i));
- }
- while (m != rp->r_month) {
- i = len_months[isleap(y)][m];
- dayoff = oadd(dayoff, eitol(i));
- ++m;
- }
- i = rp->r_dayofmonth;
- if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
- if (rp->r_dycode == DC_DOWLEQ)
- --i;
- else {
- error("use of 2/29 in non leap-year");
- (void) exit(EXIT_FAILURE);
- }
- }
- --i;
- dayoff = oadd(dayoff, eitol(i));
- if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
- register long wday;
-
- #define LDAYSPERWEEK ((long) DAYSPERWEEK)
- wday = eitol(EPOCH_WDAY);
- /*
- ** Don't trust mod of negative numbers.
- */
- if (dayoff >= 0)
- wday = (wday + dayoff) % LDAYSPERWEEK;
- else {
- wday -= ((-dayoff) % LDAYSPERWEEK);
- if (wday < 0)
- wday += LDAYSPERWEEK;
- }
- while (wday != eitol(rp->r_wday))
- if (rp->r_dycode == DC_DOWGEQ) {
- dayoff = oadd(dayoff, (long) 1);
- if (++wday >= LDAYSPERWEEK)
- wday = 0;
- ++i;
- } else {
- dayoff = oadd(dayoff, (long) -1);
- if (--wday < 0)
- wday = LDAYSPERWEEK;
- --i;
- }
- if (i < 0 || i >= len_months[isleap(y)][m]) {
- error("no day in month matches rule");
- (void) exit(EXIT_FAILURE);
- }
- }
- if (dayoff < 0 && !tt_signed) {
- if (wantedy == rp->r_loyear)
- return min_time;
- error("time before zero");
- (void) exit(EXIT_FAILURE);
- }
- t = (time_t) dayoff * SECSPERDAY;
- /*
- ** Cheap overflow check.
- */
- if (t / SECSPERDAY != dayoff) {
- if (wantedy == rp->r_hiyear)
- return max_time;
- if (wantedy == rp->r_loyear)
- return min_time;
- error("time overflow");
- (void) exit(EXIT_FAILURE);
- }
- return tadd(t, rp->r_tod);
- }
-
- static void
- newabbr(string)
- const char * const string;
- {
- register int i;
-
- i = strlen(string) + 1;
- if (charcnt + i >= TZ_MAX_CHARS) {
- error("too many, or too long, time zone abbreviations");
- (void) exit(EXIT_FAILURE);
- }
- (void) strcpy(&chars[charcnt], string);
- charcnt += eitol(i);
- }
-
- static int
- mkdirs(name)
- char * const name;
- {
- register char * cp;
-
- if ((cp = name) == NULL || *cp == '\0')
- return 0;
- while ((cp = strchr(cp + 1, '/')) != 0) {
- *cp = '\0';
- #ifndef unix
- /*
- ** MS-DOS drive specifier?
- */
- if (strlen(name) == 2 && isascii(name[0]) &&
- isalpha(name[0]) && name[1] == ':') {
- *cp = '/';
- continue;
- }
- #endif /* !defined unix */
- if (!itsdir(name)) {
- /*
- ** It doesn't seem to exist, so we try to create it.
- */
- if (emkdir(name, 0755) != 0) {
- (void) fprintf(stderr,
- "%s: Can't create directory ",
- progname);
- (void) perror(name);
- return -1;
- }
- }
- *cp = '/';
- }
- return 0;
- }
-
- static long
- eitol(i)
- const int i;
- {
- long l;
-
- l = i;
- if (i < 0 && l >= 0 || i == 0 && l != 0 || i > 0 && l <= 0) {
- (void) fprintf(stderr, "%s: %d did not sign extend correctly\n",
- progname, i);
- (void) exit(EXIT_FAILURE);
- }
- return l;
- }
-
- /*
- ** UNIX is a registered trademark of AT&T.
- */
- End of zic.c
- echo file 'zdump.c' >&2
- cat >'zdump.c' <<'End of zdump.c'
- #ifndef lint
- #ifndef NOID
- static char elsieid[] = "@(#)zdump.c 7.1";
- #endif /* !defined NOID */
- #endif /* !defined lint */
-
- /*
- ** This code has been made independent of the rest of the time
- ** conversion package to increase confidence in the verification it provides.
- ** You can use this code to help in verifying other implementations.
- */
-
- #include "stdio.h" /* for stdout, stderr */
- #include "string.h" /* for strcpy */
- #include "sys/types.h" /* for time_t */
- #include "time.h" /* for struct tm */
-
- #ifndef MAX_STRING_LENGTH
- #define MAX_STRING_LENGTH 1024
- #endif /* !defined MAX_STRING_LENGTH */
-
- #ifndef TRUE
- #define TRUE 1
- #endif /* !defined TRUE */
-
- #ifndef FALSE
- #define FALSE 0
- #endif /* !defined FALSE */
-
- #ifndef EXIT_SUCCESS
- #define EXIT_SUCCESS 0
- #endif /* !defined EXIT_SUCCESS */
-
- #ifndef EXIT_FAILURE
- #define EXIT_FAILURE 1
- #endif /* !defined EXIT_FAILURE */
-
- #ifndef SECSPERMIN
- #define SECSPERMIN 60
- #endif /* !defined SECSPERMIN */
-
- #ifndef SECSPERHOUR
- #define SECSPERHOUR 3600
- #endif /* !defined SECSPERHOUR */
-
- #ifndef HOURSPERDAY
- #define HOURSPERDAY 24
- #endif /* !defined HOURSPERDAY */
-
- #ifndef EPOCH_YEAR
- #define EPOCH_YEAR 1970
- #endif /* !defined EPOCH_YEAR */
-
- #ifndef DAYSPERNYEAR
- #define DAYSPERNYEAR 365
- #endif /* !defined DAYSPERNYEAR */
-
- extern char ** environ;
- extern int getopt();
- extern char * optarg;
- extern int optind;
- extern time_t time();
- extern char * tzname[2];
- extern void tzset();
-
- #ifdef USG
- extern void exit();
- extern void perror();
- #endif /* defined USG */
-
- static char * abbr();
- static long delta();
- static void hunt();
- static int longest;
- static char * progname;
- static void show();
-
- int
- main(argc, argv)
- int argc;
- char * argv[];
- {
- register int i, c;
- register int vflag;
- register char * cutoff;
- register int cutyear;
- register long cuttime;
- time_t now;
- time_t t, newt;
- time_t hibit;
- struct tm tm, newtm;
-
- progname = argv[0];
- vflag = 0;
- cutoff = NULL;
- while ((c = getopt(argc, argv, "c:v")) == 'c' || c == 'v')
- if (c == 'v')
- vflag = 1;
- else cutoff = optarg;
- if (c != EOF || optind == argc - 1 && strcmp(argv[optind], "=") == 0) {
- (void) fprintf(stderr,
- "%s: usage is %s [ -v ] [ -c cutoff ] zonename ...\n",
- argv[0], argv[0]);
- (void) exit(EXIT_FAILURE);
- }
- if (cutoff != NULL)
- cutyear = atoi(cutoff);
- /*
- ** VERY approximate.
- */
- cuttime = (long) (cutyear - EPOCH_YEAR) *
- SECSPERHOUR * HOURSPERDAY * DAYSPERNYEAR;
- (void) time(&now);
- longest = 0;
- for (i = optind; i < argc; ++i)
- if (strlen(argv[i]) > longest)
- longest = strlen(argv[i]);
- for (hibit = 1; (hibit << 1) != 0; hibit <<= 1)
- ;
- for (i = optind; i < argc; ++i) {
- register char ** saveenv;
- static char buf[MAX_STRING_LENGTH];
- char * fakeenv[2];
-
- if (strlen(argv[i]) + 4 > sizeof buf) {
- (void) fflush(stdout);
- (void) fprintf(stderr, "%s: argument too long -- %s\n",
- progname, argv[i]);
- (void) exit(EXIT_FAILURE);
- }
- (void) strcpy(buf, "TZ=");
- (void) strcat(buf, argv[i]);
- fakeenv[0] = buf;
- fakeenv[1] = NULL;
- saveenv = environ;
- environ = fakeenv;
- (void) tzset();
- environ = saveenv;
- show(argv[i], now, FALSE);
- if (!vflag)
- continue;
- /*
- ** Get lowest value of t.
- */
- t = hibit;
- if (t > 0) /* time_t is unsigned */
- t = 0;
- show(argv[i], t, TRUE);
- t += SECSPERHOUR * HOURSPERDAY;
- show(argv[i], t, TRUE);
- tm = *localtime(&t);
- (void) strncpy(buf, abbr(&tm), (sizeof buf) - 1);
- for ( ; ; ) {
- if (cutoff != NULL && t >= cuttime)
- break;
- newt = t + SECSPERHOUR * 12;
- if (cutoff != NULL && newt >= cuttime)
- break;
- if (newt <= t)
- break;
- newtm = *localtime(&newt);
- if (delta(&newtm, &tm) != (newt - t) ||
- newtm.tm_isdst != tm.tm_isdst ||
- strcmp(abbr(&newtm), buf) != 0) {
- hunt(argv[i], t, newt);
- (void) strncpy(buf, abbr(&newtm),
- (sizeof buf) - 1);
- }
- t = newt;
- tm = newtm;
- }
- /*
- ** Get highest value of t.
- */
- t = ~((time_t) 0);
- if (t < 0) /* time_t is signed */
- t &= ~hibit;
- t -= SECSPERHOUR * HOURSPERDAY;
- show(argv[i], t, TRUE);
- t += SECSPERHOUR * HOURSPERDAY;
- show(argv[i], t, TRUE);
- }
- if (fflush(stdout) || ferror(stdout)) {
- (void) fprintf(stderr, "%s: Error writing standard output ",
- argv[0]);
- (void) perror("standard output");
- (void) exit(EXIT_FAILURE);
- }
- exit(EXIT_SUCCESS);
-
- /* gcc -Wall pacifier */
- for ( ; ; )
- ;
- }
-
- static void
- hunt(name, lot, hit)
- char * name;
- time_t lot;
- time_t hit;
- {
- time_t t;
- struct tm lotm;
- struct tm tm;
- static char loab[MAX_STRING_LENGTH];
-
- lotm = *localtime(&lot);
- (void) strncpy(loab, abbr(&lotm), (sizeof loab) - 1);
- while ((hit - lot) >= 2) {
- t = lot / 2 + hit / 2;
- if (t <= lot)
- ++t;
- else if (t >= hit)
- --t;
- tm = *localtime(&t);
- if (delta(&tm, &lotm) == (t - lot) &&
- tm.tm_isdst == lotm.tm_isdst &&
- strcmp(abbr(&tm), loab) == 0) {
- lot = t;
- lotm = tm;
- } else hit = t;
- }
- show(name, lot, TRUE);
- show(name, hit, TRUE);
- }
-
- static long
- delta(newp, oldp)
- struct tm * newp;
- struct tm * oldp;
- {
- long result;
-
- result = newp->tm_hour - oldp->tm_hour;
- if (result < 0)
- result += HOURSPERDAY;
- result *= SECSPERHOUR;
- result += (newp->tm_min - oldp->tm_min) * SECSPERMIN;
- return result + newp->tm_sec - oldp->tm_sec;
- }
-
- static void
- show(zone, t, v)
- char * zone;
- time_t t;
- int v;
- {
- struct tm * tmp;
- extern struct tm * localtime();
-
- (void) printf("%-*s ", longest, zone);
- if (v)
- (void) printf("%.24s GMT = ", asctime(gmtime(&t)));
- tmp = localtime(&t);
- (void) printf("%.24s", asctime(tmp));
- if (*abbr(tmp) != '\0')
- (void) printf(" %s", abbr(tmp));
- if (v) {
- (void) printf(" isdst=%d", tmp->tm_isdst);
- #ifdef TM_GMTOFF
- (void) printf(" gmtoff=%ld", tmp->TM_GMTOFF);
- #endif /* defined TM_GMTOFF */
- }
- (void) printf("\n");
- }
-
- static char *
- abbr(tmp)
- struct tm * tmp;
- {
- register char * result;
-
- if (tmp->tm_isdst != 0 && tmp->tm_isdst != 1)
- return "";
- result = tzname[tmp->tm_isdst];
- return (result == NULL) ? "" : result;
- }
- End of zdump.c
- echo file 'scheck.c' >&2
- cat >'scheck.c' <<'End of scheck.c'
- #ifndef lint
- #ifndef NOID
- static char elsieid[] = "@(#)scheck.c 8.10";
- #endif /* !defined lint */
- #endif /* !defined NOID */
-
- /*LINTLIBRARY*/
-
- #include "private.h"
-
- extern char * imalloc P((int n));
- extern void ifree P((char * p));
-
- char *
- scheck(string, format)
- const char * const string;
- const char * const format;
- {
- register char * fbuf;
- register const char * fp;
- register char * tp;
- register int c;
- register char * result;
- char dummy;
-
- result = "";
- if (string == NULL || format == NULL)
- return result;
- fbuf = imalloc(2 * strlen(format) + 4);
- if (fbuf == NULL)
- return result;
- fp = format;
- tp = fbuf;
- while ((*tp++ = c = *fp++) != '\0') {
- if (c != '%')
- continue;
- if (*fp == '%') {
- *tp++ = *fp++;
- continue;
- }
- *tp++ = '*';
- if (*fp == '*')
- ++fp;
- while (isascii(*fp) && isdigit(*fp))
- *tp++ = *fp++;
- if (*fp == 'l' || *fp == 'h')
- *tp++ = *fp++;
- else if (*fp == '[')
- do *tp++ = *fp++;
- while (*fp != '\0' && *fp != ']');
- if ((*tp++ = *fp++) == '\0')
- break;
- }
- *(tp - 1) = '%';
- *tp++ = 'c';
- *tp = '\0';
- if (sscanf(string, fbuf, &dummy) != 1)
- result = (char *) format;
- ifree(fbuf);
- return result;
- }
- End of scheck.c
- echo file 'ialloc.c' >&2
- cat >'ialloc.c' <<'End of ialloc.c'
- #ifndef lint
- #ifndef NOID
- static char elsieid[] = "@(#)ialloc.c 8.19";
- #endif /* !defined NOID */
- #endif /* !defined lint */
-
- /*LINTLIBRARY*/
-
- #include "private.h"
-
- #ifdef MAL
- #define NULLMAL(x) ((x) == NULL || (x) == MAL)
- #else /* !defined MAL */
- #define NULLMAL(x) ((x) == NULL)
- #endif /* !defined MAL */
-
- #define nonzero(n) (((n) == 0) ? 1 : (n))
-
- char * icalloc P((int nelem, int elsize));
- char * icatalloc P((char * old, const char * new));
- char * icpyalloc P((const char * string));
- char * imalloc P((int n));
- char * irealloc P((char * pointer, int size));
- void ifree P((char * pointer));
-
- char *
- imalloc(n)
- const int n;
- {
- #ifdef MAL
- register char * result;
-
- result = malloc((alloc_size_t) nonzero(n));
- return NULLMAL(result) ? NULL : result;
- #else /* !defined MAL */
- return malloc((alloc_size_t) nonzero(n));
- #endif /* !defined MAL */
- }
-
- char *
- icalloc(nelem, elsize)
- int nelem;
- int elsize;
- {
- if (nelem == 0 || elsize == 0)
- nelem = elsize = 1;
- return calloc((alloc_size_t) nelem, (alloc_size_t) elsize);
- }
-
- char *
- irealloc(pointer, size)
- char * const pointer;
- const int size;
- {
- if (NULLMAL(pointer))
- return imalloc(size);
- return realloc((genericptr_t) pointer, (alloc_size_t) nonzero(size));
- }
-
- char *
- icatalloc(old, new)
- char * const old;
- const char * const new;
- {
- register char * result;
- register oldsize, newsize;
-
- newsize = NULLMAL(new) ? 0 : strlen(new);
- if (NULLMAL(old))
- oldsize = 0;
- else if (newsize == 0)
- return old;
- else oldsize = strlen(old);
- if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
- if (!NULLMAL(new))
- (void) strcpy(result + oldsize, new);
- return result;
- }
-
- char *
- icpyalloc(string)
- const char * const string;
- {
- return icatalloc((char *) NULL, string);
- }
-
- void
- ifree(p)
- char * const p;
- {
- if (!NULLMAL(p))
- (void) free(p);
- }
-
- void
- icfree(p)
- char * const p;
- {
- if (!NULLMAL(p))
- (void) free(p);
- }
- End of ialloc.c
- echo file 'emkdir.c' >&2
- cat >'emkdir.c' <<'End of emkdir.c'
- #ifndef lint
- #ifndef NOID
- static char elsieid[] = "@(#)emkdir.c 8.20";
- #endif /* !defined NOID */
- #endif /* !defined lint */
-
- #ifndef emkdir
-
- /*LINTLIBRARY*/
-
- #include "private.h"
-
- extern char * imalloc P((int n));
- extern void ifree P((char * p));
-
- static char *
- quoted(name)
- register const char * name;
- {
- register char * result;
- register char * cp;
- register int c;
-
- if (name == NULL)
- name = "";
- result = imalloc(4 * strlen(name) + 3);
- if (result == NULL)
- return NULL;
- cp = result;
- #ifdef unix
- *cp++ = '\'';
- while ((c = *name++) != '\0')
- if (c == '\'') {
- *cp++ = c;
- *cp++ = '\\';
- *cp++ = c;
- *cp++ = c;
- } else *cp++ = c;
- *cp++ = '\'';
- #else /* !defined unix */
- while ((c = *name++) != '\0')
- if (c == '/')
- *cp++ = '\\';
- else *cp++ = c;
- #endif /* !defined unix */
- *cp = '\0';
- return result;
- }
-
- int
- emkdir(name, mode)
- const char * name;
- const int mode;
- {
- register int result;
- register const char * format;
- register char * command;
- register char * qname;
-
- if ((qname = quoted(name)) == NULL)
- return -1;
- #ifdef unix
- format = "mkdir 2>&- %s && chmod 2>&- %o %s";
- #else /* !defined unix */
- format = "mkdir %s";
- #endif /* !defined unix */
- command = imalloc(strlen(format) + 2 * strlen(qname) + 20 + 1);
- if (command == NULL) {
- ifree(qname);
- return -1;
- }
- (void) sprintf(command, format, qname, mode, qname);
- ifree(qname);
- result = system(command);
- ifree(command);
- return (result == 0) ? 0 : -1;
- }
-
- /*
- ** UNIX is a registered trademark of AT&T.
- */
-
- #endif /* !defined emkdir */
- End of emkdir.c
- echo file 'getopt.c' >&2
- cat >'getopt.c' <<'End of getopt.c'
- #ifndef lint
- #ifndef NOID
- static char elsieid[] = "@(#)getopt.c 7.1";
- /* Modified from the UCB version whose SCCS ID appears below. */
- #endif /* !defined NOID */
- #endif /* !defined lint */
-
- /*LINTLIBRARY*/
-
- /*
- * Copyright (c) 1987 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that this notice is preserved and that due credit is given
- * to the University of California at Berkeley. The name of the University
- * may not be used to endorse or promote products derived from this
- * software without specific written prior permission. This software
- * is provided ``as is'' without express or implied warranty.
- */
-
- #ifdef LIBC_SCCS
- #ifndef lint
- static char sccsid[] = "@(#)getopt.c 4.5 (Berkeley) 11/24/87";
- #endif /* !defined lint */
- #endif /* defined LIBC_SCCS */
-
- #include <stdio.h>
-
- /*
- * get option letter from argument vector
- */
- int opterr = 1, /* if error message should be printed */
- optind = 1, /* index into parent argv vector */
- optopt; /* character checked for validity */
- char *optarg; /* argument associated with option */
-
- #define BADCH (int)'?'
- #define EMSG ""
- #define tell(s) { \
- if (opterr) { \
- (void) fputs(*nargv, stderr); \
- (void) fputs(s, stderr); \
- (void) fputc(optopt, stderr); \
- (void) fputc((int)'\n', stderr); \
- } \
- return(BADCH); \
- }
-
- int
- getopt(nargc, nargv, ostr)
- int nargc;
- char **nargv, *ostr;
- {
- static char *place = EMSG; /* option letter processing */
- register char *oli; /* option letter list index */
- char *strchr();
-
- if (!*place) { /* update scanning pointer */
- if (optind >= nargc || *(place = nargv[optind]) != '-' ||
- !*++place)
- return(EOF);
- if (*place == '-') { /* found "--" */
- ++optind;
- return(EOF);
- }
- } /* option letter okay? */
- if ((optopt = (int)*place++) == (int)':' ||
- !(oli = strchr(ostr, optopt))) {
- if (!*place)
- ++optind;
- tell(": illegal option -- ");
- }
- if (*++oli != ':') { /* don't need argument */
- optarg = NULL;
- if (!*place)
- ++optind;
- }
- else { /* need an argument */
- if (*place) /* no white space */
- optarg = place;
- else if (nargc <= ++optind) { /* no arg */
- place = EMSG;
- tell(": option requires an argument -- ");
- }
- else /* white space */
- optarg = nargv[optind];
- place = EMSG;
- ++optind;
- }
- return(optopt); /* dump back option letter */
- }
- End of getopt.c
- exit
-