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NetBSD/lib/libc/time/zic.c

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/* $NetBSD: zic.c,v 1.18 2000/12/12 15:25:41 kleink Exp $ */
#include <sys/cdefs.h>
#ifndef lint
#ifndef NOID
#if 0
static char elsieid[] = "@(#)zic.c 7.101";
#else
__RCSID("$NetBSD: zic.c,v 1.18 2000/12/12 15:25:41 kleink Exp $");
#endif
#endif /* !defined NOID */
#endif /* !defined lint */
#include "private.h"
#include "locale.h"
#include "tzfile.h"
#include "sys/stat.h" /* for umask manifest constants */
#include "unistd.h"
/*
** On some ancient hosts, predicates like `isspace(C)' are defined
** only if isascii(C) || C == EOF. Modern hosts obey the C Standard,
** which says they are defined only if C == ((unsigned char) C) || C == EOF.
** Neither the C Standard nor Posix require that `isascii' exist.
** For portability, we check both ancient and modern requirements.
** If isascii is not defined, the isascii check succeeds trivially.
*/
#include "ctype.h"
#ifndef isascii
#define isascii(x) 1
#endif
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 */
int r_todisgmt; /* above is GMT if TRUE */
/* or local 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 getopt P((int argc, char * const argv[],
const char * options));
extern int link P((const char * fromname, const char * toname));
extern char * optarg;
extern int optind;
static int atcomp P((const void *, const void *));
static void addtt P((time_t starttime, int type));
static int addtype P((long gmtoff, const char * abbr, int isdst,
int ttisstd, int ttisgmt));
static void leapadd P((time_t t, int positive, int rolling, int count));
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 doabbr P((char * abbr, int abbrlen, const char * format,
const char * letters, int isdst));
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));
int main P((int, char **));
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 void * leftp, const void * rightp));
static time_t rpytime P((const struct rule * rp, int wantedy));
static void rulesub P((struct rule * rp,
const char * loyearp, const char * hiyearp,
const char * typep, const char * monthp,
const char * dayp, const char * timep));
static void setboundaries P((void));
static time_t tadd P((time_t t1, long t2));
static void usage P((void));
static void warning P((const char * const));
static void writezone P((const char * name));
static int yearistype P((int year, const char * type));
#if !(HAVE_STRERROR - 0)
static char * strerror P((int));
#endif /* !(HAVE_STRERROR - 0) */
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 int max_year_representable;
static time_t min_time;
static int min_year;
static int min_year_representable;
static int noise;
static const char * rfilename;
static int rlinenum;
static const char * progname;
static int timecnt;
static int typecnt;
/*
** 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 struct attype {
time_t at;
unsigned char type;
} attypes[TZ_MAX_TIMES];
static long gmtoffs[TZ_MAX_TYPES];
static char isdsts[TZ_MAX_TYPES];
static unsigned char abbrinds[TZ_MAX_TYPES];
static char ttisstds[TZ_MAX_TYPES];
static char ttisgmts[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) {
const char *e = strerror(errno);
(void) fprintf(stderr, _("%s: Memory exhausted: %s\n"),
progname, e);
(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.
*/
#if !(HAVE_STRERROR - 0)
static char *
strerror(errnum)
int errnum;
{
extern char * sys_errlist[];
extern int sys_nerr;
return (errnum > 0 && errnum <= sys_nerr) ?
sys_errlist[errnum] : _("Unknown system error");
}
#endif /* !(HAVE_STRERROR - 0) */
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
warning(string)
const char * const string;
{
char * cp;
cp = ecpyalloc(_("warning: "));
cp = ecatalloc(cp, string);
error(cp);
ifree(cp);
--errors;
}
static void
usage P((void))
{
(void) fprintf(stderr, _("%s: usage is %s [ -s ] [ -v ] [ -l localtime ] [ -p posixrules ] \\\n\t[ -d directory ] [ -L leapseconds ] [ -y yearistype ] [ 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 const char * yitcommand;
static int sflag = FALSE;
int
main(argc, argv)
int argc;
char * argv[];
{
register int i;
register int j;
register int c;
#ifdef _POSIX_VERSION
(void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
#endif /* defined _POSIX_VERSION */
#if HAVE_GETTEXT - 0
(void) setlocale(LC_MESSAGES, "");
#ifdef TZ_DOMAINDIR
(void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
#endif /* defined TEXTDOMAINDIR */
(void) textdomain(TZ_DOMAIN);
#endif /* HAVE_GETTEXT - 0 */
progname = argv[0];
while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF && c != -1)
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 'y':
if (yitcommand == NULL)
yitcommand = optarg;
else {
(void) fprintf(stderr,
_("%s: More than one -y 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;
if (yitcommand == NULL)
yitcommand = "yearistype";
setboundaries();
if (optind < argc && leapsec != NULL) {
infile(leapsec);
adjleap();
}
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)
continue;
outzone(&zones[i], j - i);
}
/*
** Make links.
*/
for (i = 0; i < nlinks; ++i) {
eat(links[i].l_filename, links[i].l_linenum);
dolink(links[i].l_from, links[i].l_to);
}
if (lcltime != NULL) {
eat("command line", 1);
dolink(lcltime, TZDEFAULT);
}
if (psxrules != NULL) {
eat("command line", 1);
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;
if (fromfile[0] == '/')
fromname = ecpyalloc(fromfile);
else {
fromname = ecpyalloc(directory);
fromname = ecatalloc(fromname, "/");
fromname = ecatalloc(fromname, fromfile);
}
if (tofile[0] == '/')
toname = ecpyalloc(tofile);
else {
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) {
int result;
if (mkdirs(toname) != 0)
(void) exit(EXIT_FAILURE);
result = link(fromname, toname);
#if (HAVE_SYMLINK - 0)
if (result != 0) {
const char *s = tofile;
register char * symlinkcontents = NULL;
while ((s = strchr(s+1, '/')) != NULL)
symlinkcontents = ecatalloc(symlinkcontents, "../");
symlinkcontents = ecatalloc(symlinkcontents, fromfile);
result = symlink(symlinkcontents, toname);
if (result == 0)
warning(_("hard link failed, symbolic link used"));
ifree(symlinkcontents);
}
#endif
if (result != 0) {
const char *e = strerror(errno);
(void) fprintf(stderr,
_("%s: Can't link from %s to %s: %s\n"),
progname, fromname, toname, e);
(void) exit(EXIT_FAILURE);
}
}
ifree(fromname);
ifree(toname);
}
#ifndef INT_MAX
#define INT_MAX ((int) (((unsigned)~0)>>1))
#endif /* !defined INT_MAX */
#ifndef INT_MIN
#define INT_MIN ((int) ~(((unsigned)~0)>>1))
#endif /* !defined INT_MIN */
/*
** The tz file format currently allows at most 32-bit quantities.
** This restriction should be removed before signed 32-bit values
** wrap around in 2038, but unfortunately this will require a
** change to the tz file format.
*/
#define MAX_BITS_IN_FILE 32
#define TIME_T_BITS_IN_FILE ((TYPE_BIT(time_t) < MAX_BITS_IN_FILE) ? TYPE_BIT(time_t) : MAX_BITS_IN_FILE)
static void
setboundaries P((void))
{
if (TYPE_SIGNED(time_t)) {
min_time = ~ (time_t) 0;
min_time <<= TIME_T_BITS_IN_FILE - 1;
max_time = ~ (time_t) 0 - min_time;
if (sflag)
min_time = 0;
} else {
min_time = 0;
max_time = 2 - sflag;
max_time <<= TIME_T_BITS_IN_FILE - 1;
--max_time;
}
min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
min_year_representable = min_year;
max_year_representable = max_year;
}
static int
itsdir(name)
const char * const name;
{
register char * myname;
register int accres;
myname = ecpyalloc(name);
myname = ecatalloc(myname, "/.");
accres = access(myname, F_OK);
ifree(myname);
return accres == 0;
}
/*
** Associate sets of rules with zones.
*/
/*
** Sort by rule name.
*/
static int
rcomp(cp1, cp2)
const void * cp1;
const void * cp2;
{
return strcmp(((const struct rule *) cp1)->r_name,
((const struct rule *) cp2)->r_name);
}
static void
associate P((void))
{
register struct zone * zp;
register struct rule * rp;
register int base, out;
register int i, j;
if (nrules != 0) {
(void) qsort((void *) rules, (size_t) nrules,
(size_t) sizeof *rules, rcomp);
for (i = 0; i < nrules - 1; ++i) {
if (strcmp(rules[i].r_name,
rules[i + 1].r_name) != 0)
continue;
if (strcmp(rules[i].r_filename,
rules[i + 1].r_filename) == 0)
continue;
eat(rules[i].r_filename, rules[i].r_linenum);
warning(_("same rule name in multiple files"));
eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
warning(_("same rule name in multiple files"));
for (j = i + 2; j < nrules; ++j) {
if (strcmp(rules[i].r_name,
rules[j].r_name) != 0)
break;
if (strcmp(rules[i].r_filename,
rules[j].r_filename) == 0)
continue;
if (strcmp(rules[i + 1].r_filename,
rules[j].r_filename) == 0)
continue;
break;
}
i = j - 1;
}
}
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) {
const char *e = strerror(errno);
(void) fprintf(stderr, _("%s: Can't open %s: %s\n"),
progname, name, e);
(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) {
static char nada;
if (strcmp(fields[nfields], "-") == 0)
fields[nfields] = &nada;
++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 %s\n"),
progname, filename);
(void) exit(EXIT_FAILURE);
}
if (fp != stdin && fclose(fp)) {
const char *e = strerror(errno);
(void) fprintf(stderr, _("%s: Error closing %s: %s\n"),
progname, filename, e);
(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) &&
!(hh == HOURSPERDAY && mm == 0 && ss == 0)) {
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 *) (void *) 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;
static char * buf;
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) {
buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
(void)sprintf(buf, /* XXX: sprintf is safe */
_("\"Zone %s\" line and -l option are mutually exclusive"),
TZDEFAULT);
error(buf);
return FALSE;
}
if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
(void)sprintf(buf, /* XXX: sprintf is safe */
_("\"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) {
buf = erealloc(buf, (int) (132 +
strlen(fields[ZF_NAME]) +
strlen(zones[i].z_filename)));
(void)sprintf(buf, /* XXX: sprintf is safe */
_("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 UTC 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 > min_time &&
z.z_untiltime < max_time &&
zones[nzones - 1].z_untiltime > min_time &&
zones[nzones - 1].z_untiltime < max_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 *) (void *) 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) {
/*
* 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 && !TYPE_SIGNED(time_t)) {
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];
{
register int positive;
int count;
if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
positive = FALSE;
count = 1;
} else if (strcmp(cp, "--") == 0) {
positive = FALSE;
count = 2;
} else if (strcmp(cp, "+") == 0) {
positive = TRUE;
count = 1;
} else if (strcmp(cp, "++") == 0) {
positive = TRUE;
count = 2;
} else {
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;
}
leapadd(tadd(t, tod), positive, lp->l_value, count);
}
}
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 *) (void *) 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;
const char * const loyearp;
const char * const hiyearp;
const char * const typep;
const char * const monthp;
const char * const dayp;
const char * const timep;
{
register const struct lookup * lp;
register const char * cp;
register char * dp;
register char * ep;
if ((lp = byword(monthp, mon_names)) == NULL) {
error(_("invalid month name"));
return;
}
rp->r_month = lp->l_value;
rp->r_todisstd = FALSE;
rp->r_todisgmt = FALSE;
dp = ecpyalloc(timep);
if (*dp != '\0') {
ep = dp + strlen(dp) - 1;
switch (lowerit(*ep)) {
case 's': /* Standard */
rp->r_todisstd = TRUE;
rp->r_todisgmt = FALSE;
*ep = '\0';
break;
case 'w': /* Wall */
rp->r_todisstd = FALSE;
rp->r_todisgmt = FALSE;
*ep = '\0';
break;
case 'g': /* Greenwich */
case 'u': /* Universal */
case 'z': /* Zulu */
rp->r_todisstd = TRUE;
rp->r_todisgmt = TRUE;
*ep = '\0';
break;
}
}
rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
ifree(dp);
/*
** Year work.
*/
cp = loyearp;
lp = byword(cp, begin_years);
if (lp != NULL) switch ((int) lp->l_value) {
case YR_MINIMUM:
rp->r_loyear = INT_MIN;
break;
case YR_MAXIMUM:
rp->r_loyear = INT_MAX;
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) {
error(_("invalid starting year"));
return;
} else if (noise) {
if (rp->r_loyear < min_year_representable)
warning(_("starting year too low to be represented"));
else if (rp->r_loyear > max_year_representable)
warning(_("starting year too high to be represented"));
}
cp = hiyearp;
if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
case YR_MINIMUM:
rp->r_hiyear = INT_MIN;
break;
case YR_MAXIMUM:
rp->r_hiyear = INT_MAX;
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) {
error(_("invalid ending year"));
return;
} else if (noise) {
if (rp->r_loyear < min_year_representable)
warning(_("starting year too low to be represented"));
else if (rp->r_loyear > max_year_representable)
warning(_("starting year too high to be represented"));
}
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);
}
if (rp->r_loyear < min_year && rp->r_loyear > 0)
min_year = rp->r_loyear;
/*
** Day work.
** Accept things such as:
** 1
** last-Sunday
** Sun<=20
** Sun>=7
*/
dp = ecpyalloc(dayp);
if ((lp = byword(dp, lasts)) != NULL) {
rp->r_dycode = DC_DOWLEQ;
rp->r_wday = lp->l_value;
rp->r_dayofmonth = len_months[1][rp->r_month];
} else {
if ((ep = strchr(dp, '<')) != 0)
rp->r_dycode = DC_DOWLEQ;
else if ((ep = strchr(dp, '>')) != 0)
rp->r_dycode = DC_DOWGEQ;
else {
ep = dp;
rp->r_dycode = DC_DOM;
}
if (rp->r_dycode != DC_DOM) {
*ep++ = 0;
if (*ep++ != '=') {
error(_("invalid day of month"));
ifree(dp);
return;
}
if ((lp = byword(dp, wday_names)) == NULL) {
error(_("invalid weekday name"));
ifree(dp);
return;
}
rp->r_wday = lp->l_value;
}
if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
rp->r_dayofmonth <= 0 ||
(rp->r_dayofmonth > len_months[1][rp->r_month])) {
error(_("invalid day of month"));
ifree(dp);
return;
}
}
ifree(dp);
}
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((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
}
static int
atcomp(avp, bvp)
const void * avp;
const void * bvp;
{
if (((struct attype *) avp)->at < ((struct attype *) bvp)->at)
return -1;
else if (((struct attype *) avp)->at > ((struct attype *) bvp)->at)
return 1;
else return 0;
}
static void
writezone(name)
const char * const name;
{
register FILE * fp;
register int i, j;
static char * fullname;
static struct tzhead tzh;
time_t ats[TZ_MAX_TIMES];
unsigned char types[TZ_MAX_TIMES];
/*
** Sort.
*/
if (timecnt > 1)
(void) qsort((void *) attypes, (size_t) timecnt,
(size_t) sizeof *attypes, atcomp);
/*
** Optimize.
*/
{
int fromi;
int toi;
toi = 0;
fromi = 0;
while (fromi < timecnt && attypes[fromi].at < min_time)
++fromi;
if (isdsts[0] == 0)
while (fromi < timecnt && attypes[fromi].type == 0)
++fromi; /* handled by default rule */
for ( ; fromi < timecnt; ++fromi) {
if (toi != 0
&& ((attypes[fromi].at
+ gmtoffs[attypes[toi - 1].type])
<= (attypes[toi - 1].at
+ gmtoffs[toi == 1 ? 0
: attypes[toi - 2].type]))) {
attypes[toi - 1].type = attypes[fromi].type;
continue;
}
if (toi == 0 ||
attypes[toi - 1].type != attypes[fromi].type)
attypes[toi++] = attypes[fromi];
}
timecnt = toi;
}
/*
** Transfer.
*/
for (i = 0; i < timecnt; ++i) {
ats[i] = attypes[i].at;
types[i] = attypes[i].type;
}
fullname = erealloc(fullname,
(int) (strlen(directory) + 1 + strlen(name) + 1));
(void) sprintf(fullname, "%s/%s", directory, name); /* XXX: sprintf is safe */
/*
** Remove old file, if any, to snap links.
*/
if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) {
const char *e = strerror(errno);
(void) fprintf(stderr, _("%s: Can't remove %s: %s\n"),
progname, fullname, e);
(void) exit(EXIT_FAILURE);
}
if ((fp = fopen(fullname, "wb")) == NULL) {
if (mkdirs(fullname) != 0)
(void) exit(EXIT_FAILURE);
if ((fp = fopen(fullname, "wb")) == NULL) {
const char *e = strerror(errno);
(void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
progname, fullname, e);
(void) exit(EXIT_FAILURE);
}
}
convert(eitol(typecnt), tzh.tzh_ttisgmtcnt);
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) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
#define DO(field) (void) fwrite((void *) tzh.field, (size_t) sizeof tzh.field, (size_t) 1, fp)
DO(tzh_magic);
DO(tzh_reserved);
DO(tzh_ttisgmtcnt);
DO(tzh_ttisstdcnt);
DO(tzh_leapcnt);
DO(tzh_timecnt);
DO(tzh_typecnt);
DO(tzh_charcnt);
#undef DO
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((void *) types, (size_t) sizeof types[0],
(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((void *) chars, (size_t) sizeof chars[0],
(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);
for (i = 0; i < typecnt; ++i)
(void) putc(ttisgmts[i], fp);
if (ferror(fp) || fclose(fp)) {
(void) fprintf(stderr, _("%s: Error writing %s\n"),
progname, fullname);
(void) exit(EXIT_FAILURE);
}
}
static void
doabbr(abbr, abbrlen, format, letters, isdst)
char * const abbr;
const int abbrlen;
const char * const format;
const char * const letters;
const int isdst;
{
if (strchr(format, '/') == NULL) {
if (letters == NULL)
(void)strncpy(abbr, format, abbrlen - 1);
else
(void)snprintf(abbr, abbrlen, format, letters);
} else if (isdst)
(void)strncpy(abbr, strchr(format, '/') + 1, abbrlen - 1);
else {
(void)strncpy(abbr, format, abbrlen - 1);
*strchr(abbr, '/') = '\0';
}
}
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 startttisstd;
register int startttisgmt;
register int type;
char startbuf[BUFSIZ];
INITIALIZE(untiltime);
INITIALIZE(starttime);
/*
** Now. . .finally. . .generate some useful data!
*/
timecnt = 0;
typecnt = 0;
charcnt = 0;
/*
** A guess that may well be corrected later.
*/
stdoff = 0;
/*
** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
** for noting the need to unconditionally initialize startttisstd.
*/
startttisstd = FALSE;
startttisgmt = FALSE;
for (i = 0; i < zonecount; ++i) {
zp = &zpfirst[i];
usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
useuntil = i < (zonecount - 1);
if (useuntil && zp->z_untiltime <= min_time)
continue;
gmtoff = zp->z_gmtoff;
eat(zp->z_filename, zp->z_linenum);
*startbuf = '\0';
startoff = zp->z_gmtoff;
if (zp->z_nrules == 0) {
stdoff = zp->z_stdoff;
doabbr(startbuf, sizeof startbuf, zp->z_format,
(char *) NULL, stdoff != 0);
type = addtype(oadd(zp->z_gmtoff, stdoff),
startbuf, stdoff != 0, startttisstd,
startttisgmt);
if (usestart) {
addtt(starttime, type);
usestart = FALSE;
}
else if (stdoff != 0)
addtt(min_time, type);
} 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];
INITIALIZE(ktime);
if (useuntil) {
/*
** Turn untiltime into UTC
** assuming the current gmtoff and
** stdoff values.
*/
untiltime = zp->z_untiltime;
if (!zp->z_untilrule.r_todisgmt)
untiltime = tadd(untiltime,
-gmtoff);
if (!zp->z_untilrule.r_todisstd)
untiltime = tadd(untiltime,
-stdoff);
}
/*
** Find the rule (of those to do, if any)
** that takes effect earliest in the year.
*/
k = -1;
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 = rp->r_todisgmt ? 0 : 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;
stdoff = rp->r_stdoff;
if (usestart && ktime == starttime)
usestart = FALSE;
if (usestart) {
if (ktime < starttime) {
startoff = oadd(zp->z_gmtoff,
stdoff);
doabbr(startbuf,sizeof startbuf,
zp->z_format,
rp->r_abbrvar,
rp->r_stdoff != 0);
continue;
}
if (*startbuf == '\0' &&
startoff == oadd(zp->z_gmtoff,
stdoff)) {
doabbr(startbuf,sizeof startbuf,
zp->z_format,
rp->r_abbrvar,
rp->r_stdoff != 0);
}
}
eats(zp->z_filename, zp->z_linenum,
rp->r_filename, rp->r_linenum);
doabbr(buf, sizeof buf, zp->z_format,
rp->r_abbrvar, rp->r_stdoff != 0);
offset = oadd(zp->z_gmtoff, rp->r_stdoff);
type = addtype(offset, buf, rp->r_stdoff != 0,
rp->r_todisstd, rp->r_todisgmt);
addtt(ktime, type);
}
}
if (usestart) {
if (*startbuf == '\0' &&
zp->z_format != NULL &&
strchr(zp->z_format, '%') == NULL &&
strchr(zp->z_format, '/') == NULL)
(void)strncpy(startbuf, zp->z_format,
sizeof(startbuf) - 1);
eat(zp->z_filename, zp->z_linenum);
if (*startbuf == '\0')
error(_("can't determine time zone abbreviation to use just after until time"));
else addtt(starttime,
addtype(startoff, startbuf,
startoff != zp->z_gmtoff,
startttisstd,
startttisgmt));
}
/*
** Now we may get to set starttime for the next zone line.
*/
if (useuntil) {
startttisstd = zp->z_untilrule.r_todisstd;
startttisgmt = zp->z_untilrule.r_todisgmt;
starttime = zp->z_untiltime;
if (!startttisstd)
starttime = tadd(starttime, -stdoff);
if (!startttisgmt)
starttime = tadd(starttime, -gmtoff);
}
}
writezone(zpfirst->z_name);
}
static void
addtt(starttime, type)
const time_t starttime;
int type;
{
if (starttime <= min_time ||
(timecnt == 1 && attypes[0].at < min_time)) {
gmtoffs[0] = gmtoffs[type];
isdsts[0] = isdsts[type];
ttisstds[0] = ttisstds[type];
ttisgmts[0] = ttisgmts[type];
if (abbrinds[type] != 0)
(void) strcpy(chars, &chars[abbrinds[type]]);
abbrinds[0] = 0;
charcnt = strlen(chars) + 1;
typecnt = 1;
timecnt = 0;
type = 0;
}
if (timecnt >= TZ_MAX_TIMES) {
error(_("too many transitions?!"));
(void) exit(EXIT_FAILURE);
}
attypes[timecnt].at = starttime;
attypes[timecnt].type = type;
++timecnt;
}
static int
addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
const long gmtoff;
const char * const abbr;
const int isdst;
const int ttisstd;
const int ttisgmt;
{
register int i, j;
if (isdst != TRUE && isdst != FALSE) {
error(_("internal error - addtype called with bad isdst"));
(void) exit(EXIT_FAILURE);
}
if (ttisstd != TRUE && ttisstd != FALSE) {
error(_("internal error - addtype called with bad ttisstd"));
(void) exit(EXIT_FAILURE);
}
if (ttisgmt != TRUE && ttisgmt != FALSE) {
error(_("internal error - addtype called with bad ttisgmt"));
(void) exit(EXIT_FAILURE);
}
/*
** 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] &&
ttisgmt == ttisgmts[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;
ttisgmts[i] = ttisgmt;
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
leapadd(t, positive, rolling, count)
const time_t t;
const int positive;
const int rolling;
int count;
{
register int i, j;
if (leapcnt + (positive ? count : 1) > 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;
}
do {
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 : eitol(-count);
roll[i] = rolling;
++leapcnt;
} while (positive && --count != 0);
}
static void
adjleap P((void))
{
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;
{
static char * buf;
int result;
if (type == NULL || *type == '\0')
return TRUE;
buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
(void)sprintf(buf, "%s %d %s", yitcommand, year, type); /* XXX: sprintf is safe */
result = system(buf);
if (WIFEXITED(result)) switch (WEXITSTATUS(result)) {
case 0:
return TRUE;
case 1:
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)
int a;
{
a = (unsigned char) 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 **) (void *)
emalloc((int) ((strlen(cp) + 1) * sizeof *array));
nsubs = 0;
for ( ; ; ) {
while (isascii(*cp) && isspace((unsigned char) *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((unsigned char) *cp)));
if (isascii(*cp) && isspace((unsigned char) *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;
if (wantedy == INT_MIN)
return min_time;
if (wantedy == INT_MAX)
return max_time;
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 - 1;
--i;
}
if (i < 0 || i >= len_months[isleap(y)][m]) {
error(_("no day in month matches rule"));
(void) exit(EXIT_FAILURE);
}
}
if (dayoff < 0 && !TYPE_SIGNED(time_t))
return min_time;
t = (time_t) dayoff * SECSPERDAY;
/*
** Cheap overflow check.
*/
if (t / SECSPERDAY != dayoff)
return (dayoff > 0) ? max_time : min_time;
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)strncpy(&chars[charcnt], string, sizeof(chars) - charcnt - 1);
charcnt += eitol(i);
}
static int
mkdirs(argname)
char * const argname;
{
register char * name;
register char * cp;
if (argname == NULL || *argname == '\0')
return 0;
cp = name = ecpyalloc(argname);
while ((cp = strchr(cp + 1, '/')) != 0) {
*cp = '\0';
#ifndef __NetBSD__
/*
** DOS drive specifier?
*/
if (isalpha((unsigned char) name[0]) &&
name[1] == ':' && name[2] == '\0') {
*cp = '/';
continue;
}
#endif /* !defined __NetBSD__ */
if (!itsdir(name)) {
/*
** It doesn't seem to exist, so we try to create it.
** Creation may fail because of the directory being
** created by some other multiprocessor, so we get
** to do extra checking.
*/
if (mkdir(name, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) != 0) {
const char *e = strerror(errno);
if (errno != EEXIST || !itsdir(name)) {
(void) fprintf(stderr,
_("%s: Can't create directory %s: %s\n"),
progname, name, e);
ifree(name);
return -1;
}
}
}
*cp = '/';
}
ifree(name);
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 was a registered trademark of UNIX System Laboratories in 1993.
*/
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