zic.c File Reference

#include "postgres_fe.h"
#include <fcntl.h>
#include <sys/stat.h>
#include <time.h>
#include "pg_getopt.h"
#include "private.h"
#include "tzfile.h"

Include dependency graph for zic.c:

Go to the source code of this file.

Data Structures
struct	rule
struct	zone
struct	link
struct	lookup
struct	attype
struct	timerange

Macros
#define	ZIC_VERSION_PRE_2013   '2'
#define	ZIC_VERSION   '3'
#define	ZIC_MIN   PG_INT64_MIN
#define	ZIC_MAX   PG_INT64_MAX
#define	ZIC_MAX_ABBR_LEN_WO_WARN   6
#define	MKDIR_UMASK   0755
#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) */
#define	linkat(targetdir, target, linknamedir, linkname, flag)   (itssymlink(target) ? (errno = ENOTSUP, -1) : link(target, linkname))
#define	LC_RULE   0
#define	LC_ZONE   1
#define	LC_LINK   2
#define	LC_LEAP   3
#define	LC_EXPIRES   4
#define	ZF_NAME   1
#define	ZF_STDOFF   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
#define	ZFC_STDOFF   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
#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_SAVE   8
#define	RF_ABBRVAR   9
#define	RULE_FIELDS   10
#define	LF_TARGET   1
#define	LF_LINKNAME   2
#define	LINK_FIELDS   3
#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
#define	EXPIRES_FIELDS   5
#define	YR_MINIMUM   0
#define	YR_MAXIMUM   1
#define	YR_ONLY   2
#define	TIME_T_BITS_IN_FILE   64
#define	ZIC_BLOAT_DEFAULT   "slim"
#define	DO(field)   fwrite(tzh.field, sizeof tzh.field, 1, fp)
#define	LDAYSPERWEEK   ((zic_t) DAYSPERWEEK)

Typedefs
typedef int64	zic_t
typedef int	lineno_t

Enumerations
enum	{ PERCENT_Z_LEN_BOUND = sizeof "+995959" - 1 }
enum	{ WORK_AROUND_QTBUG_53071 = true }

Functions
int	link (const char *target, const char *linkname)
static void	memory_exhausted (const char *msg) pg_attribute_noreturn()
static void	verror (const char *string, va_list args) pg_attribute_printf(1
static void static void	error (const char *string,...) pg_attribute_printf(1
static void static void static void	warning (const char *string,...) pg_attribute_printf(1
static void static void static void static void	usage (FILE *stream, int status) pg_attribute_noreturn()
static void	addtt (zic_t starttime, int type)
static int	addtype (zic_t, char const *, bool, bool, bool)
static void	leapadd (zic_t, int, int)
static void	adjleap (void)
static void	associate (void)
static void	dolink (const char *, const char *, bool)
static char **	getfields (char *buf)
static zic_t	gethms (const char *string, const char *errstring)
static zic_t	getsave (char *, bool *)
static void	inexpires (char **, int)
static void	infile (const char *filename)
static void	inleap (char **fields, int nfields)
static void	inlink (char **fields, int nfields)
static void	inrule (char **fields, int nfields)
static bool	inzcont (char **fields, int nfields)
static bool	inzone (char **fields, int nfields)
static bool	inzsub (char **, int, bool)
static bool	itsdir (char const *)
static bool	itssymlink (char const *)
static bool	is_alpha (char a)
static char	lowerit (char)
static void	mkdirs (char const *, bool)
static void	newabbr (const char *abbr)
static zic_t	oadd (zic_t t1, zic_t t2)
static void	outzone (const struct zone *zp, ptrdiff_t ntzones)
static zic_t	rpytime (const struct rule *rp, zic_t wantedy)
static void	rulesub (struct rule *rp, const char *loyearp, const char *hiyearp, const char *typep, const char *monthp, const char *dayp, const char *timep)
static zic_t	tadd (zic_t t1, zic_t t2)
static struct lookup const *	byword (const char *string, const struct lookup *lp)
static size_t	size_product (size_t nitems, size_t itemsize)
static void *	memcheck (void *ptr)
static void *	emalloc (size_t size)
static void *	erealloc (void *ptr, size_t size)
static char *	ecpyalloc (char const *str)
static void *	growalloc (void *ptr, size_t itemsize, ptrdiff_t nitems, ptrdiff_t *nitems_alloc)
static void	eats (char const *name, lineno_t num, char const *rname, lineno_t rnum)
static void	eat (char const *name, lineno_t num)
static void	close_file (FILE *stream, char const *dir, char const *name)
static void	change_directory (char const *dir)
static bool	timerange_option (char *timerange)
static bool	want_bloat (void)
int	main (int argc, char **argv)
static bool	componentcheck (char const *name, char const *component, char const *component_end)
static bool	namecheck (const char *name)
static int	hardlinkerr (char const *target, char const *linkname)
static int	rcomp (const void *cp1, const void *cp2)
static zic_t	getleapdatetime (char **fields, int nfields, bool expire_line)
static void	convert (const int32 val, char *const buf)
static void	convert64 (const zic_t val, char *const buf)
static void	puttzcode (const int32 val, FILE *const fp)
static void	puttzcodepass (zic_t val, FILE *fp, int pass)
static int	atcomp (const void *avp, const void *bvp)
static struct timerange	limitrange (struct timerange r, zic_t lo, zic_t hi, zic_t const *ats, unsigned char const *types)
static void	writezone (const char *const name, const char *const string, char version, int defaulttype)
static char const *	abbroffset (char *buf, zic_t offset)
static size_t	doabbr (char *abbr, struct zone const *zp, char const *letters, bool isdst, zic_t save, bool doquotes)
static void	updateminmax (const zic_t x)
static int	stringoffset (char *result, zic_t offset)
static int	stringrule (char *result, struct rule *const rp, zic_t save, zic_t stdoff)
static int	rule_cmp (struct rule const *a, struct rule const *b)
static int	stringzone (char *result, struct zone const *zpfirst, ptrdiff_t zonecount)
static bool	is_space (char a)
static bool	ciequal (const char *ap, const char *bp)
static bool	itsabbr (const char *abbr, const char *word)
static bool	ciprefix (char const *abbr, char const *word)
static void	time_overflow (void)

Variables
static ptrdiff_t const	PTRDIFF_MAX = MAXVAL(ptrdiff_t, TYPE_BIT(ptrdiff_t))
static int	charcnt
static bool	errors
static bool	warnings
static const char *	filename
static int	leapcnt
static bool	leapseen
static zic_t	leapminyear
static zic_t	leapmaxyear
static lineno_t	linenum
static int	max_abbrvar_len = PERCENT_Z_LEN_BOUND
static int	max_format_len
static zic_t	max_year
static zic_t	min_year
static bool	noise
static bool	print_abbrevs
static zic_t	print_cutoff
static const char *	rfilename
static lineno_t	rlinenum
static const char *	progname
static ptrdiff_t	timecnt
static ptrdiff_t	timecnt_alloc
static int	typecnt
static struct rule *	rules
static ptrdiff_t	nrules
static ptrdiff_t	nrules_alloc
static struct zone *	zones
static ptrdiff_t	nzones
static ptrdiff_t	nzones_alloc
static struct link *	links
static ptrdiff_t	nlinks
static ptrdiff_t	nlinks_alloc
static struct lookup const	zi_line_codes []
static struct lookup const	leap_line_codes []
static struct lookup const	mon_names []
static struct lookup const	wday_names []
static struct lookup const	lasts []
static struct lookup const	begin_years []
static struct lookup const	end_years []
static struct lookup const	leap_types []
static const int	len_months [2][MONSPERYEAR]
static const int	len_years [2]
static struct attype *	attypes
static zic_t	utoffs [TZ_MAX_TYPES]
static char	isdsts [TZ_MAX_TYPES]
static unsigned char	desigidx [TZ_MAX_TYPES]
static bool	ttisstds [TZ_MAX_TYPES]
static bool	ttisuts [TZ_MAX_TYPES]
static char	chars [TZ_MAX_CHARS]
static zic_t	trans [TZ_MAX_LEAPS]
static zic_t	corr [TZ_MAX_LEAPS]
static char	roll [TZ_MAX_LEAPS]
static zic_t const	min_time = MINVAL(zic_t, TIME_T_BITS_IN_FILE)
static zic_t const	max_time = MAXVAL(zic_t, TIME_T_BITS_IN_FILE)
static zic_t	lo_time = MINVAL(zic_t, TIME_T_BITS_IN_FILE)
static zic_t	hi_time = MAXVAL(zic_t, TIME_T_BITS_IN_FILE)
static zic_t	leapexpires = -1
static zic_t	comment_leapexpires = -1
static const char *	psxrules
static const char *	lcltime
static const char *	directory
static const char *	leapsec
static const char *	tzdefault
static int	bloat

Macro Definition Documentation

DC_DOM

#define DC_DOM   0 /* 1..31 */ /* unused */

Definition at line 89 of file zic.c.

Referenced by outzone(), rulesub(), stringrule(), and stringzone().

DC_DOWGEQ

#define DC_DOWGEQ   1 /* 1..31 */ /* 0..6 (Sun..Sat) */

Definition at line 90 of file zic.c.

Referenced by rpytime(), rulesub(), and stringrule().

DC_DOWLEQ

#define DC_DOWLEQ   2 /* 1..31 */ /* 0..6 (Sun..Sat) */

Definition at line 91 of file zic.c.

Referenced by rpytime(), rulesub(), and stringrule().

DO

#define DO

(

field

)

fwrite(tzh.field, sizeof tzh.field, 1, fp)

Referenced by writezone().

EXPIRES_FIELDS

#define EXPIRES_FIELDS   5

Definition at line 271 of file zic.c.

Referenced by inexpires().

LC_EXPIRES

#define LC_EXPIRES   4

Definition at line 204 of file zic.c.

Referenced by infile().

LC_LEAP

#define LC_LEAP   3

Definition at line 203 of file zic.c.

Referenced by infile().

LC_LINK

#define LC_LINK   2

Definition at line 202 of file zic.c.

Referenced by infile().

LC_RULE

#define LC_RULE   0

Definition at line 200 of file zic.c.

Referenced by infile().

LC_ZONE

#define LC_ZONE   1

Definition at line 201 of file zic.c.

Referenced by infile().

LDAYSPERWEEK

#define LDAYSPERWEEK   ((zic_t) DAYSPERWEEK)

Referenced by rpytime().

LEAP_FIELDS

#define LEAP_FIELDS   7

Definition at line 268 of file zic.c.

Referenced by inleap().

LF_LINKNAME

#define LF_LINKNAME   2

Definition at line 255 of file zic.c.

Referenced by inlink().

LF_TARGET

#define LF_TARGET   1

Definition at line 254 of file zic.c.

Referenced by inlink().

LINK_FIELDS

#define LINK_FIELDS   3

Definition at line 256 of file zic.c.

Referenced by inlink().

linkat

#define linkat	(		targetdir,
			target,
			linknamedir,
			linkname,
			flag
	)		(itssymlink(target) ? (errno = ENOTSUP, -1) : link(target, linkname))

Definition at line 116 of file zic.c.

Referenced by hardlinkerr().

LP_CORR

#define LP_CORR   5

Definition at line 266 of file zic.c.

Referenced by inleap().

LP_DAY

#define LP_DAY   3

Definition at line 264 of file zic.c.

Referenced by getleapdatetime().

LP_MONTH

#define LP_MONTH   2

Definition at line 263 of file zic.c.

Referenced by getleapdatetime().

LP_ROLL

#define LP_ROLL   6

Definition at line 267 of file zic.c.

Referenced by inleap().

LP_TIME

#define LP_TIME   4

Definition at line 265 of file zic.c.

Referenced by getleapdatetime().

LP_YEAR

#define LP_YEAR   1

Definition at line 262 of file zic.c.

Referenced by getleapdatetime().

MKDIR_UMASK

#define MKDIR_UMASK   0755

Definition at line 37 of file zic.c.

Referenced by mkdirs().

RF_ABBRVAR

#define RF_ABBRVAR   9

Definition at line 247 of file zic.c.

Referenced by inrule().

RF_COMMAND

#define RF_COMMAND   4

Definition at line 242 of file zic.c.

Referenced by inrule().

RF_DAY

#define RF_DAY   6

Definition at line 244 of file zic.c.

Referenced by inrule().

RF_HIYEAR

#define RF_HIYEAR   3

Definition at line 241 of file zic.c.

Referenced by inrule().

RF_LOYEAR

#define RF_LOYEAR   2

Definition at line 240 of file zic.c.

Referenced by inrule().

RF_MONTH

#define RF_MONTH   5

Definition at line 243 of file zic.c.

Referenced by inrule().

RF_NAME

#define RF_NAME   1

Definition at line 239 of file zic.c.

Referenced by inrule().

RF_SAVE

#define RF_SAVE   8

Definition at line 246 of file zic.c.

Referenced by inrule().

RF_TOD

#define RF_TOD   7

Definition at line 245 of file zic.c.

Referenced by inrule().

RULE_FIELDS

#define RULE_FIELDS   10

Definition at line 248 of file zic.c.

Referenced by inrule().

TIME_T_BITS_IN_FILE

#define TIME_T_BITS_IN_FILE   64

Definition at line 580 of file zic.c.

YR_MAXIMUM

#define YR_MAXIMUM   1

Definition at line 278 of file zic.c.

Referenced by rulesub().

YR_MINIMUM

#define YR_MINIMUM   0

Definition at line 277 of file zic.c.

Referenced by rulesub().

YR_ONLY

#define YR_ONLY   2

Definition at line 279 of file zic.c.

Referenced by rulesub().

ZF_FORMAT

#define ZF_FORMAT   4

Definition at line 213 of file zic.c.

Referenced by inzsub().

ZF_NAME

#define ZF_NAME   1

Definition at line 210 of file zic.c.

Referenced by inzone(), and inzsub().

ZF_RULE

#define ZF_RULE   3

Definition at line 212 of file zic.c.

Referenced by inzsub().

ZF_STDOFF

#define ZF_STDOFF   2

Definition at line 211 of file zic.c.

Referenced by inzsub().

ZF_TILDAY

#define ZF_TILDAY   7

Definition at line 216 of file zic.c.

Referenced by inzsub().

ZF_TILMONTH

#define ZF_TILMONTH   6

Definition at line 215 of file zic.c.

Referenced by inzsub().

ZF_TILTIME

#define ZF_TILTIME   8

Definition at line 217 of file zic.c.

Referenced by inzsub().

ZF_TILYEAR

#define ZF_TILYEAR   5

Definition at line 214 of file zic.c.

Referenced by inzsub().

ZFC_FORMAT

#define ZFC_FORMAT   2

Definition at line 227 of file zic.c.

Referenced by inzsub().

ZFC_RULE

#define ZFC_RULE   1

Definition at line 226 of file zic.c.

Referenced by inzsub().

ZFC_STDOFF

#define ZFC_STDOFF   0

Definition at line 225 of file zic.c.

Referenced by inzsub().

ZFC_TILDAY

#define ZFC_TILDAY   5

Definition at line 230 of file zic.c.

Referenced by inzsub().

ZFC_TILMONTH

#define ZFC_TILMONTH   4

Definition at line 229 of file zic.c.

Referenced by inzsub().

ZFC_TILTIME

#define ZFC_TILTIME   6

Definition at line 231 of file zic.c.

Referenced by inzsub().

ZFC_TILYEAR

#define ZFC_TILYEAR   3

Definition at line 228 of file zic.c.

Referenced by inzsub().

ZIC_BLOAT_DEFAULT

#define ZIC_BLOAT_DEFAULT   "slim"

Definition at line 648 of file zic.c.

Referenced by main().

ZIC_MAX

#define ZIC_MAX   PG_INT64_MAX

Definition at line 27 of file zic.c.

Referenced by gethms(), limitrange(), oadd(), outzone(), rpytime(), rulesub(), stringzone(), and writezone().

ZIC_MAX_ABBR_LEN_WO_WARN

#define ZIC_MAX_ABBR_LEN_WO_WARN   6

Definition at line 30 of file zic.c.

Referenced by newabbr().

ZIC_MIN

#define ZIC_MIN   PG_INT64_MIN

Definition at line 26 of file zic.c.

Referenced by oadd(), outzone(), rpytime(), and rulesub().

ZIC_VERSION

#define ZIC_VERSION   '3'

Definition at line 23 of file zic.c.

Referenced by outzone().

ZIC_VERSION_PRE_2013

#define ZIC_VERSION_PRE_2013   '2'

Definition at line 22 of file zic.c.

Referenced by outzone().

ZONE_MAXFIELDS

#define ZONE_MAXFIELDS   9

Definition at line 219 of file zic.c.

Referenced by inzone().

ZONE_MINFIELDS

#define ZONE_MINFIELDS   5

Definition at line 218 of file zic.c.

ZONEC_MAXFIELDS

#define ZONEC_MAXFIELDS   7

Definition at line 233 of file zic.c.

Referenced by inzcont().

ZONEC_MINFIELDS

#define ZONEC_MINFIELDS   3

Definition at line 232 of file zic.c.

Typedef Documentation

lineno_t

typedef int lineno_t

Definition at line 55 of file zic.c.

zic_t

typedef int64 zic_t

Definition at line 25 of file zic.c.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
PERCENT_Z_LEN_BOUND

Definition at line 158 of file zic.c.

{
PERCENT_Z_LEN_BOUND = sizeof "+995959" - 1};

anonymous enum

anonymous enum

Enumerator
WORK_AROUND_QTBUG_53071

Definition at line 168 of file zic.c.

{
WORK_AROUND_QTBUG_53071 = true};

Function Documentation

abbroffset()

static char const* abbroffset ( char *  buf, zic_t  offset  )

static

Definition at line 2584 of file zic.c.

References _, buf, error(), MINSPERHOUR, SECSPERMIN, and sign.

Referenced by doabbr().

{
    char        sign = '+';
    int         seconds,
                minutes;

    if (offset < 0)
    {
        offset = -offset;
        sign = '-';
    }

    seconds = offset % SECSPERMIN;
    offset /= SECSPERMIN;
    minutes = offset % MINSPERHOUR;
    offset /= MINSPERHOUR;
    if (100 <= offset)
    {
        error(_("%%z UT offset magnitude exceeds 99:59:59"));
        return "%z";
    }
    else
    {
        char       *p = buf;

        *p++ = sign;
        *p++ = '0' + offset / 10;
        *p++ = '0' + offset % 10;
        if (minutes | seconds)
        {
            *p++ = '0' + minutes / 10;
            *p++ = '0' + minutes % 10;
            if (seconds)
            {
                *p++ = '0' + seconds / 10;
                *p++ = '0' + seconds % 10;
            }
        }
        *p = '\0';
        return buf;
    }
}

addtt()

static void addtt ( zic_t  starttime, int  type  )

static

Definition at line 3346 of file zic.c.

References attype::at, attypes, attype::dontmerge, growalloc(), timecnt, generate_unaccent_rules::type, and attype::type.

Referenced by outzone().

{
    attypes = growalloc(attypes, sizeof *attypes, timecnt, &timecnt_alloc);
    attypes[timecnt].at = starttime;
    attypes[timecnt].dontmerge = false;
    attypes[timecnt].type = type;
    ++timecnt;
}

addtype()

static int addtype ( zic_t  utoff, char const *  abbr, bool  isdst, bool  ttisstd, bool  ttisut  )

static

Definition at line 3356 of file zic.c.

References _, charcnt, error(), EXIT_FAILURE, i, newabbr(), typecnt, TZ_MAX_TYPES, and want_bloat().

Referenced by outzone(), and writezone().

{
    int         i,
                j;

    if (!(-1L - 2147483647L <= utoff && utoff <= 2147483647L))
    {
        error(_("UT offset out of range"));
        exit(EXIT_FAILURE);
    }
    if (!want_bloat())
        ttisstd = ttisut = false;

    for (j = 0; j < charcnt; ++j)
        if (strcmp(&chars[j], abbr) == 0)
            break;
    if (j == charcnt)
        newabbr(abbr);
    else
    {
        /* If there's already an entry, return its index.  */
        for (i = 0; i < typecnt; i++)
            if (utoff == utoffs[i] && isdst == isdsts[i] && j == desigidx[i]
                && ttisstd == ttisstds[i] && ttisut == ttisuts[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"));
        exit(EXIT_FAILURE);
    }
    i = typecnt++;
    utoffs[i] = utoff;
    isdsts[i] = isdst;
    ttisstds[i] = ttisstd;
    ttisuts[i] = ttisut;
    desigidx[i] = j;
    return i;
}

adjleap()

static void adjleap ( void  )

static

Definition at line 3423 of file zic.c.

References _, comment_leapexpires, error(), EXIT_FAILURE, i, leapcnt, oadd(), SECSPERDAY, tadd(), and warning().

Referenced by main().

{
    int         i;
    zic_t       last = 0;
    zic_t       prevtrans = 0;

    /*
     * propagate leap seconds forward
     */
    for (i = 0; i < leapcnt; ++i)
    {
        if (trans[i] - prevtrans < 28 * SECSPERDAY)
        {
            error(_("Leap seconds too close together"));
            exit(EXIT_FAILURE);
        }
        prevtrans = trans[i];
        trans[i] = tadd(trans[i], last);
        last = corr[i] += last;
    }

    if (leapexpires < 0)
    {
        leapexpires = comment_leapexpires;
        if (0 <= leapexpires)
            warning(_("\"#expires\" is obsolescent; use \"Expires\""));
    }

    if (0 <= leapexpires)
    {
        leapexpires = oadd(leapexpires, last);
        if (!(leapcnt == 0 || (trans[leapcnt - 1] < leapexpires)))
        {
            error(_("last Leap time does not precede Expires time"));
            exit(EXIT_FAILURE);
        }
        if (leapexpires <= hi_time)
            hi_time = leapexpires - 1;
    }
}

associate()

static void associate ( void  )

static

Definition at line 1156 of file zic.c.

References _, eat(), error(), EXIT_FAILURE, getsave(), i, nrules, nzones, qsort, rule::r_filename, rule::r_linenum, rule::r_name, rcomp(), warning(), zone::z_filename, zone::z_format_specifier, zone::z_isdst, zone::z_linenum, zone::z_nrules, zone::z_rule, zone::z_rules, and zone::z_save.

Referenced by main().

{
    struct zone *zp;
    struct rule *rp;
    ptrdiff_t   i,
                j,
                base,
                out;

    if (nrules != 0)
    {
        qsort(rules, nrules, 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_save = getsave(zp->z_rule, &zp->z_isdst);

            /*
             * Note, though, that if there's no rule, a '%s' in the format is
             * a bad thing.
             */
            if (zp->z_format_specifier == 's')
                error("%s", _("%s in ruleless zone"));
        }
    }
    if (errors)
        exit(EXIT_FAILURE);
}

atcomp()

static int atcomp ( const void *  avp, const void *  bvp  )

static

Definition at line 2035 of file zic.c.

Referenced by writezone().

{
    const zic_t a = ((const struct attype *) avp)->at;
    const zic_t b = ((const struct attype *) bvp)->at;

    return (a < b) ? -1 : (a > b);
}

byword()

static const struct lookup * byword ( const char *  string, const struct lookup *  lp  )

static

Definition at line 3649 of file zic.c.

References _, ciequal(), ciprefix(), itsabbr(), lookup::l_word, warning(), and wday_names.

Referenced by getleapdatetime(), infile(), inleap(), and rulesub().

{
    const struct lookup *foundlp;
    const struct lookup *lp;

    if (word == NULL || table == NULL)
        return NULL;

    /*
     * If TABLE is LASTS and the word starts with "last" followed by a
     * non-'-', skip the "last" and look in WDAY_NAMES instead. Warn about any
     * usage of the undocumented prefix "last-".
     */
    if (table == lasts && ciprefix("last", word) && word[4])
    {
        if (word[4] == '-')
            warning(_("\"%s\" is undocumented; use \"last%s\" instead"),
                    word, word + 5);
        else
        {
            word += 4;
            table = wday_names;
        }
    }

    /*
     * 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 (ciprefix(word, lp->l_word))
        {
            if (foundlp == NULL)
                foundlp = lp;
            else
                return NULL;    /* multiple inexact matches */
        }

    if (foundlp && noise)
    {
        /* Warn about any backward-compatibility issue with pre-2017c zic.  */
        bool        pre_2017c_match = false;

        for (lp = table; lp->l_word; lp++)
            if (itsabbr(word, lp->l_word))
            {
                if (pre_2017c_match)
                {
                    warning(_("\"%s\" is ambiguous in pre-2017c zic"), word);
                    break;
                }
                pre_2017c_match = true;
            }
    }

    return foundlp;
}

change_directory()

static void change_directory ( char const *  dir )

static

Definition at line 560 of file zic.c.

References _, EXIT_FAILURE, fprintf, mkdirs(), and strerror.

Referenced by main().

{
    if (chdir(dir) != 0)
    {
        int         chdir_errno = errno;

        if (chdir_errno == ENOENT)
        {
            mkdirs(dir, false);
            chdir_errno = chdir(dir) == 0 ? 0 : errno;
        }
        if (chdir_errno != 0)
        {
            fprintf(stderr, _("%s: Can't chdir to %s: %s\n"),
                    progname, dir, strerror(chdir_errno));
            exit(EXIT_FAILURE);
        }
    }
}

ciequal()

static bool ciequal ( const char *  ap, const char *  bp  )

static

Definition at line 3612 of file zic.c.

References lowerit().

Referenced by byword().

{
    while (lowerit(*ap) == lowerit(*bp++))
        if (*ap++ == '\0')
            return true;
    return false;
}

ciprefix()

static bool ciprefix ( char const *  abbr, char const *  word  )

static

Definition at line 3638 of file zic.c.

References lowerit().

Referenced by byword().

{
    do
        if (!*abbr)
            return true;
    while (lowerit(*abbr++) == lowerit(*word++));

    return false;
}

close_file()

static void close_file ( FILE *  stream, char const *  dir, char const *  name  )

static

Definition at line 525 of file zic.c.

References _, EXIT_FAILURE, fprintf, and strerror.

Referenced by dolink(), infile(), main(), usage(), and writezone().

{
    char const *e = (ferror(stream) ? _("I/O error")
                     : fclose(stream) != 0 ? strerror(errno) : NULL);

    if (e)
    {
        fprintf(stderr, "%s: %s%s%s%s%s\n", progname,
                dir ? dir : "", dir ? "/" : "",
                name ? name : "", name ? ": " : "",
                e);
        exit(EXIT_FAILURE);
    }
}

componentcheck()

static bool componentcheck ( char const *  name, char const *  component, char const *  component_end  )

static

Definition at line 857 of file zic.c.

References _, error(), and warning().

Referenced by namecheck().

{
    enum
    {
    component_len_max = 14};
    ptrdiff_t   component_len = component_end - component;

    if (component_len == 0)
    {
        if (!*name)
            error(_("empty file name"));
        else
            error(_(component == name
                    ? "file name '%s' begins with '/'"
                    : *component_end
                    ? "file name '%s' contains '//'"
                    : "file name '%s' ends with '/'"),
                  name);
        return false;
    }
    if (0 < component_len && component_len <= 2
        && component[0] == '.' && component_end[-1] == '.')
    {
        int         len = component_len;

        error(_("file name '%s' contains '%.*s' component"),
              name, len, component);
        return false;
    }
    if (noise)
    {
        if (0 < component_len && component[0] == '-')
            warning(_("file name '%s' component contains leading '-'"),
                    name);
        if (component_len_max < component_len)
            warning(_("file name '%s' contains overlength component"
                      " '%.*s...'"),
                    name, component_len_max, component);
    }
    return true;
}

convert()

static void convert ( const int32  val, char *const  buf  )

static

Definition at line 1990 of file zic.c.

References i.

Referenced by ExecEvalConvertRowtype(), ExecInitExprRec(), fmtfloat(), fmtint(), fmtptr(), get_rule_expr(), pg_strfromd(), print_double(), puttzcode(), and writezone().

{
    int         i;
    int         shift;
    unsigned char *const b = (unsigned char *) buf;

    for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
        b[i] = val >> shift;
}

convert64()

static void convert64 ( const zic_t  val, char *const  buf  )

static

Definition at line 2001 of file zic.c.

References i.

Referenced by puttzcodepass().

{
    int         i;
    int         shift;
    unsigned char *const b = (unsigned char *) buf;

    for (i = 0, shift = 56; i < 8; ++i, shift -= 8)
        b[i] = val >> shift;
}

doabbr()

static size_t doabbr ( char *  abbr, struct zone const *  zp, char const *  letters, bool  isdst, zic_t  save, bool  doquotes  )

static

Definition at line 2628 of file zic.c.

References abbroffset(), format, is_alpha(), PERCENT_Z_LEN_BOUND, sprintf, zone::z_format, zone::z_format_specifier, and zone::z_stdoff.

Referenced by outzone(), and stringzone().

{
    char       *cp;
    char       *slashp;
    size_t      len;
    char const *format = zp->z_format;

    slashp = strchr(format, '/');
    if (slashp == NULL)
    {
        char        letterbuf[PERCENT_Z_LEN_BOUND + 1];

        if (zp->z_format_specifier == 'z')
            letters = abbroffset(letterbuf, zp->z_stdoff + save);
        else if (!letters)
            letters = "%s";
        sprintf(abbr, format, letters);
    }
    else if (isdst)
    {
        strcpy(abbr, slashp + 1);
    }
    else
    {
        memcpy(abbr, format, slashp - format);
        abbr[slashp - format] = '\0';
    }
    len = strlen(abbr);
    if (!doquotes)
        return len;
    for (cp = abbr; is_alpha(*cp); cp++)
        continue;
    if (len > 0 && *cp == '\0')
        return len;
    abbr[len + 2] = '\0';
    abbr[len + 1] = '>';
    memmove(abbr + 1, abbr, len);
    abbr[0] = '<';
    return len + 2;
}

dolink()

static void dolink ( const char *  target, const char *  linkname, bool  staysymlink  )

static

Definition at line 1002 of file zic.c.

References _, close_file(), ENOTSUP, EXIT_FAILURE, fprintf, free, hardlinkerr(), itsdir(), itssymlink(), mkdirs(), relname, strerror, symlink, and warning().

Referenced by main().

{
    bool        remove_only = strcmp(target, "-") == 0;
    bool        linkdirs_made = false;
    int         link_errno;

    /*
     * We get to be careful here since there's a fair chance of root running
     * us.
     */
    if (!remove_only && itsdir(target))
    {
        fprintf(stderr, _("%s: linking target %s/%s failed: %s\n"),
                progname, directory, target, strerror(EPERM));
        exit(EXIT_FAILURE);
    }
    if (staysymlink)
        staysymlink = itssymlink(linkname);
    if (remove(linkname) == 0)
        linkdirs_made = true;
    else if (errno != ENOENT)
    {
        char const *e = strerror(errno);

        fprintf(stderr, _("%s: Can't remove %s/%s: %s\n"),
                progname, directory, linkname, e);
        exit(EXIT_FAILURE);
    }
    if (remove_only)
        return;
    link_errno = staysymlink ? ENOTSUP : hardlinkerr(target, linkname);
    if (link_errno == ENOENT && !linkdirs_made)
    {
        mkdirs(linkname, true);
        linkdirs_made = true;
        link_errno = hardlinkerr(target, linkname);
    }
    if (link_errno != 0)
    {
#ifdef HAVE_SYMLINK
        bool        absolute = *target == '/';
        char       *linkalloc = absolute ? NULL : relname(target, linkname);
        char const *contents = absolute ? target : linkalloc;
        int         symlink_errno = symlink(contents, linkname) == 0 ? 0 : errno;

        if (!linkdirs_made
            && (symlink_errno == ENOENT || symlink_errno == ENOTSUP))
        {
            mkdirs(linkname, true);
            if (symlink_errno == ENOENT)
                symlink_errno = symlink(contents, linkname) == 0 ? 0 : errno;
        }
        free(linkalloc);
        if (symlink_errno == 0)
        {
            if (link_errno != ENOTSUP)
                warning(_("symbolic link used because hard link failed: %s"),
                        strerror(link_errno));
        }
        else
#endif                          /* HAVE_SYMLINK */
        {
            FILE       *fp,
                       *tp;
            int         c;

            fp = fopen(target, "rb");
            if (!fp)
            {
                char const *e = strerror(errno);

                fprintf(stderr, _("%s: Can't read %s/%s: %s\n"),
                        progname, directory, target, e);
                exit(EXIT_FAILURE);
            }
            tp = fopen(linkname, "wb");
            if (!tp)
            {
                char const *e = strerror(errno);

                fprintf(stderr, _("%s: Can't create %s/%s: %s\n"),
                        progname, directory, linkname, e);
                exit(EXIT_FAILURE);
            }
            while ((c = getc(fp)) != EOF)
                putc(c, tp);
            close_file(fp, directory, target);
            close_file(tp, directory, linkname);
            if (link_errno != ENOTSUP)
                warning(_("copy used because hard link failed: %s"),
                        strerror(link_errno));
#ifdef HAVE_SYMLINK
            else if (symlink_errno != ENOTSUP)
                warning(_("copy used because symbolic link failed: %s"),
                        strerror(symlink_errno));
#endif
        }
    }
}

eat()

static void eat ( char const *  name, lineno_t  num  )

static

Definition at line 480 of file zic.c.

References eats().

Referenced by associate(), infile(), main(), and outzone().

{
    eats(name, num, NULL, -1);
}

eats()

static void eats ( char const *  name, lineno_t  num, char const *  rname, lineno_t  rnum  )

static

Definition at line 471 of file zic.c.

References name.

Referenced by eat(), and outzone().

{
    filename = name;
    linenum = num;
    rfilename = rname;
    rlinenum = rnum;
}

ecpyalloc()

static char* ecpyalloc ( char const *  str )

static

Definition at line 444 of file zic.c.

References memcheck().

Referenced by inlink(), inrule(), inzsub(), mkdirs(), and rulesub().

{
    return memcheck(strdup(str));
}

emalloc()

static void* emalloc ( size_t  size )

static

Definition at line 432 of file zic.c.

References malloc, and memcheck().

Referenced by getfields(), itsdir(), namecheck(), outzone(), and writezone().

{
    return memcheck(malloc(size));
}

erealloc()

static void* erealloc ( void *  ptr, size_t  size  )

static

Definition at line 438 of file zic.c.

References memcheck(), and realloc.

Referenced by growalloc().

{
    return memcheck(realloc(ptr, size));
}

error()

static void error ( const char *  string,   ...  )

static

Definition at line 502 of file zic.c.

References generate_unaccent_rules::args, and verror().

Referenced by abbroffset(), addtype(), adjleap(), associate(), componentcheck(), getfields(), gethms(), getleapdatetime(), inexpires(), infile(), inleap(), inlink(), inrule(), inzcont(), inzone(), inzsub(), leapadd(), main(), mkdirs(), newabbr(), outzone(), rpytime(), rulesub(), time_overflow(), and writezone().

{
    va_list     args;

    va_start(args, string);
    verror(string, args);
    va_end(args);
    errors = true;
}

getfields()

static char ** getfields ( char *  buf )

static

Definition at line 3715 of file zic.c.

References _, emalloc(), error(), EXIT_FAILURE, is_space(), and size_product().

Referenced by infile().

{
    char       *dp;
    char      **array;
    int         nsubs;

    if (cp == NULL)
        return NULL;
    array = emalloc(size_product(strlen(cp) + 1, sizeof *array));
    nsubs = 0;
    for (;;)
    {
        while (is_space(*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"));
                        exit(EXIT_FAILURE);
                    }
        } while (*cp && *cp != '#' && !is_space(*cp));
        if (is_space(*cp))
            ++cp;
        *dp = '\0';
    }
    array[nsubs] = NULL;
    return array;
}

gethms()

static zic_t gethms ( const char *  string, const char *  errstring  )

static

Definition at line 1363 of file zic.c.

References _, error(), HOURSPERDAY, MINSPERHOUR, oadd(), SECSPERHOUR, SECSPERMIN, sign, warning(), and ZIC_MAX.

Referenced by getleapdatetime(), getsave(), inzsub(), and rulesub().

{
    /* PG: make hh be int not zic_t to avoid sscanf portability issues */
    int         hh;
    int         sign,
                mm = 0,
                ss = 0;
    char        hhx,
                mmx,
                ssx,
                xr = '0',
                xs;
    int         tenths = 0;
    bool        ok = true;

    if (string == NULL || *string == '\0')
        return 0;
    if (*string == '-')
    {
        sign = -1;
        ++string;
    }
    else
        sign = 1;
    switch (sscanf(string,
                   "%d%c%d%c%d%c%1d%*[0]%c%*[0123456789]%c",
                   &hh, &hhx, &mm, &mmx, &ss, &ssx, &tenths, &xr, &xs))
    {
        default:
            ok = false;
            break;
        case 8:
            ok = '0' <= xr && xr <= '9';
            /* fallthrough */
        case 7:
            ok &= ssx == '.';
            if (ok && noise)
                warning(_("fractional seconds rejected by"
                          " pre-2018 versions of zic"));
            /* fallthrough */
        case 5:
            ok &= mmx == ':';
            /* fallthrough */
        case 3:
            ok &= hhx == ':';
            /* fallthrough */
        case 1:
            break;
    }
    if (!ok)
    {
        error("%s", errstring);
        return 0;
    }
    if (hh < 0 ||
        mm < 0 || mm >= MINSPERHOUR ||
        ss < 0 || ss > SECSPERMIN)
    {
        error("%s", errstring);
        return 0;
    }
    /* Some compilers warn that this test is unsatisfiable for 32-bit ints */
#if INT_MAX > PG_INT32_MAX
    if (ZIC_MAX / SECSPERHOUR < hh)
    {
        error(_("time overflow"));
        return 0;
    }
#endif
    ss += 5 + ((ss ^ 1) & (xr == '0')) <= tenths;   /* Round to even.  */
    if (noise && (hh > HOURSPERDAY ||
                  (hh == HOURSPERDAY && (mm != 0 || ss != 0))))
        warning(_("values over 24 hours not handled by pre-2007 versions of zic"));
    return oadd(sign * (zic_t) hh * SECSPERHOUR,
                sign * (mm * SECSPERMIN + ss));
}

getleapdatetime()

static zic_t getleapdatetime ( char **  fields, int  nfields, bool  expire_line  )

static

Definition at line 1664 of file zic.c.

References _, byword(), EPOCH_YEAR, error(), gethms(), i, isleap, lookup::l_value, LP_DAY, LP_MONTH, LP_TIME, LP_YEAR, oadd(), SECSPERDAY, tadd(), and TM_JANUARY.

Referenced by inexpires(), and inleap().

{
    const char *cp;
    const struct lookup *lp;
    zic_t       i,
                j;

    /* PG: make year be int not zic_t to avoid sscanf portability issues */
    int         year;
    int         month,
                day;
    zic_t       dayoff,
                tod;
    zic_t       t;
    char        xs;

    dayoff = 0;
    cp = fields[LP_YEAR];
    if (sscanf(cp, "%d%c", &year, &xs) != 1)
    {
        /*
         * Leapin' Lizards!
         */
        error(_("invalid leaping year"));
        return -1;
    }
    if (!expire_line)
    {
        if (!leapseen || leapmaxyear < year)
            leapmaxyear = year;
        if (!leapseen || leapminyear > year)
            leapminyear = year;
        leapseen = true;
    }
    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, i);
    }
    if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL)
    {
        error(_("invalid month name"));
        return -1;
    }
    month = lp->l_value;
    j = TM_JANUARY;
    while (j != month)
    {
        i = len_months[isleap(year)][j];
        dayoff = oadd(dayoff, i);
        ++j;
    }
    cp = fields[LP_DAY];
    if (sscanf(cp, "%d%c", &day, &xs) != 1 ||
        day <= 0 || day > len_months[isleap(year)][month])
    {
        error(_("invalid day of month"));
        return -1;
    }
    dayoff = oadd(dayoff, day - 1);
    if (dayoff < min_time / SECSPERDAY)
    {
        error(_("time too small"));
        return -1;
    }
    if (dayoff > max_time / SECSPERDAY)
    {
        error(_("time too large"));
        return -1;
    }
    t = dayoff * SECSPERDAY;
    tod = gethms(fields[LP_TIME], _("invalid time of day"));
    t = tadd(t, tod);
    if (t < 0)
        error(_("leap second precedes Epoch"));
    return t;
}

getsave()

static zic_t getsave ( char *  field, bool *  isdst  )

static

Definition at line 1441 of file zic.c.

References _, and gethms().

Referenced by associate(), and inrule().

{
    int         dst = -1;
    zic_t       save;
    size_t      fieldlen = strlen(field);

    if (fieldlen != 0)
    {
        char       *ep = field + fieldlen - 1;

        switch (*ep)
        {
            case 'd':
                dst = 1;
                *ep = '\0';
                break;
            case 's':
                dst = 0;
                *ep = '\0';
                break;
        }
    }
    save = gethms(field, _("invalid saved time"));
    *isdst = dst < 0 ? save != 0 : dst;
    return save;
}

growalloc()

static void* growalloc ( void *  ptr, size_t  itemsize, ptrdiff_t  nitems, ptrdiff_t *  nitems_alloc  )

static

Definition at line 450 of file zic.c.

References _, erealloc(), memory_exhausted(), PTRDIFF_MAX, size_product(), and WORK_AROUND_QTBUG_53071.

Referenced by addtt(), inlink(), inrule(), and inzsub().

{
    if (nitems < *nitems_alloc)
        return ptr;
    else
    {
        ptrdiff_t   nitems_max = PTRDIFF_MAX - WORK_AROUND_QTBUG_53071;
        ptrdiff_t   amax = nitems_max < SIZE_MAX ? nitems_max : SIZE_MAX;

        if ((amax - 1) / 3 * 2 < *nitems_alloc)
            memory_exhausted(_("integer overflow"));
        *nitems_alloc += (*nitems_alloc >> 1) + 1;
        return erealloc(ptr, size_product(*nitems_alloc, itemsize));
    }
}

hardlinkerr()

static int hardlinkerr ( char const *  target, char const *  linkname  )

static

Definition at line 994 of file zic.c.

References linkat.

Referenced by dolink().

{
    int         r = linkat(AT_FDCWD, target, AT_FDCWD, linkname, AT_SYMLINK_FOLLOW);

    return r == 0 ? 0 : errno;
}

inexpires()

static void inexpires ( char **  fields, int  nfields  )

static

Definition at line 1785 of file zic.c.

References _, error(), EXPIRES_FIELDS, and getleapdatetime().

Referenced by infile().

{
    if (nfields != EXPIRES_FIELDS)
        error(_("wrong number of fields on Expires line"));
    else if (0 <= leapexpires)
        error(_("multiple Expires lines"));
    else
        leapexpires = getleapdatetime(fields, nfields, true);
}

infile()

static void infile ( const char *  filename )

static

Definition at line 1241 of file zic.c.

References _, buf, byword(), close_file(), eat(), error(), EXIT_FAILURE, fprintf, free, getfields(), inexpires(), inleap(), inlink(), inrule(), inzcont(), inzone(), lookup::l_value, LC_EXPIRES, LC_LEAP, LC_LINK, LC_RULE, LC_ZONE, leap_line_codes, strerror, and zi_line_codes.

Referenced by AlterSystemSetConfigFile(), convert_sourcefiles_in(), isolation_start_test(), main(), psql_start_test(), and readfile().

{
    FILE       *fp;
    char      **fields;
    char       *cp;
    const struct lookup *lp;
    int         nfields;
    bool        wantcont;
    lineno_t    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);

        fprintf(stderr, _("%s: Cannot open %s: %s\n"),
                progname, name, e);
        exit(EXIT_FAILURE);
    }
    wantcont = false;
    for (num = 1;; ++num)
    {
        eat(name, num);
        if (fgets(buf, sizeof buf, fp) != buf)
            break;
        cp = strchr(buf, '\n');
        if (cp == NULL)
        {
            error(_("line too long"));
            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)
        {
            if (name == leapsec && *buf == '#')
            {
                /*
                 * PG: INT64_FORMAT isn't portable for sscanf, so be content
                 * with scanning a "long".  Once we are requiring C99 in all
                 * live branches, it'd be sensible to adopt upstream's
                 * practice of using the <inttypes.h> macros.  But for now, we
                 * don't actually use this code, and it won't overflow before
                 * 2038 anyway.
                 */
                long        cl_tmp;

                sscanf(buf, "#expires %ld", &cl_tmp);
                comment_leapexpires = cl_tmp;
            }
        }
        else if (wantcont)
        {
            wantcont = inzcont(fields, nfields);
        }
        else
        {
            struct lookup const *line_codes
            = name == leapsec ? leap_line_codes : zi_line_codes;

            lp = byword(fields[0], line_codes);
            if (lp == NULL)
                error(_("input line of unknown type"));
            else
                switch (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:
                        inleap(fields, nfields);
                        wantcont = false;
                        break;
                    case LC_EXPIRES:
                        inexpires(fields, nfields);
                        wantcont = false;
                        break;
                    default:    /* "cannot happen" */
                        fprintf(stderr,
                                _("%s: panic: Invalid l_value %d\n"),
                                progname, lp->l_value);
                        exit(EXIT_FAILURE);
                }
        }
        free(fields);
    }
    close_file(fp, NULL, filename);
    if (wantcont)
        error(_("expected continuation line not found"));
}

inleap()

static void inleap ( char **  fields, int  nfields  )

static

Definition at line 1753 of file zic.c.

References _, byword(), error(), getleapdatetime(), lookup::l_value, LEAP_FIELDS, leapadd(), LP_CORR, and LP_ROLL.

Referenced by infile().

{
    if (nfields != LEAP_FIELDS)
        error(_("wrong number of fields on Leap line"));
    else
    {
        zic_t       t = getleapdatetime(fields, nfields, false);

        if (0 <= t)
        {
            struct lookup const *lp = byword(fields[LP_ROLL], leap_types);

            if (!lp)
                error(_("invalid Rolling/Stationary field on Leap line"));
            else
            {
                int         correction = 0;

                if (!fields[LP_CORR][0])    /* infile() turns "-" into "".  */
                    correction = -1;
                else if (strcmp(fields[LP_CORR], "+") == 0)
                    correction = 1;
                else
                    error(_("invalid CORRECTION field on Leap line"));
                if (correction)
                    leapadd(t, correction, lp->l_value);
            }
        }
    }
}

inlink()

static void inlink ( char **  fields, int  nfields  )

static

Definition at line 1796 of file zic.c.

References _, ecpyalloc(), error(), filename, growalloc(), link::l_filename, link::l_linenum, link::l_linkname, link::l_target, LF_LINKNAME, LF_TARGET, linenum, LINK_FIELDS, and namecheck().

Referenced by infile().

{
    struct link l;

    if (nfields != LINK_FIELDS)
    {
        error(_("wrong number of fields on Link line"));
        return;
    }
    if (*fields[LF_TARGET] == '\0')
    {
        error(_("blank TARGET field on Link line"));
        return;
    }
    if (!namecheck(fields[LF_LINKNAME]))
        return;
    l.l_filename = filename;
    l.l_linenum = linenum;
    l.l_target = ecpyalloc(fields[LF_TARGET]);
    l.l_linkname = ecpyalloc(fields[LF_LINKNAME]);
    links = growalloc(links, sizeof *links, nlinks, &nlinks_alloc);
    links[nlinks++] = l;
}

inrule()

static void inrule ( char **  fields, int  nfields  )

static

Definition at line 1469 of file zic.c.

References _, ecpyalloc(), error(), filename, getsave(), growalloc(), linenum, rule::r_abbrvar, rule::r_filename, rule::r_isdst, rule::r_linenum, rule::r_name, rule::r_save, RF_ABBRVAR, RF_COMMAND, RF_DAY, RF_HIYEAR, RF_LOYEAR, RF_MONTH, RF_NAME, RF_SAVE, RF_TOD, RULE_FIELDS, and rulesub().

Referenced by infile().

{
    static struct rule r;

    if (nfields != RULE_FIELDS)
    {
        error(_("wrong number of fields on Rule line"));
        return;
    }
    switch (*fields[RF_NAME])
    {
        case '\0':
        case ' ':
        case '\f':
        case '\n':
        case '\r':
        case '\t':
        case '\v':
        case '+':
        case '-':
        case '0':
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
            error(_("Invalid rule name \"%s\""), fields[RF_NAME]);
            return;
    }
    r.r_filename = filename;
    r.r_linenum = linenum;
    r.r_save = getsave(fields[RF_SAVE], &r.r_isdst);
    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]);
    if (max_abbrvar_len < strlen(r.r_abbrvar))
        max_abbrvar_len = strlen(r.r_abbrvar);
    rules = growalloc(rules, sizeof *rules, nrules, &nrules_alloc);
    rules[nrules++] = r;
}

inzcont()

static bool inzcont ( char **  fields, int  nfields  )

static

Definition at line 1554 of file zic.c.

References _, error(), inzsub(), and ZONEC_MAXFIELDS.

Referenced by infile().

{
    if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS)
    {
        error(_("wrong number of fields on Zone continuation line"));
        return false;
    }
    return inzsub(fields, nfields, true);
}

inzone()

static bool inzone ( char **  fields, int  nfields  )

static

Definition at line 1516 of file zic.c.

References _, error(), i, inzsub(), nzones, TZDEFRULES, ZF_NAME, and ZONE_MAXFIELDS.

Referenced by infile().

{
    ptrdiff_t   i;

    if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS)
    {
        error(_("wrong number of fields on Zone line"));
        return false;
    }
    if (lcltime != NULL && strcmp(fields[ZF_NAME], tzdefault) == 0)
    {
        error(
              _("\"Zone %s\" line and -l option are mutually exclusive"),
              tzdefault);
        return false;
    }
    if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL)
    {
        error(
              _("\"Zone %s\" line and -p option are mutually exclusive"),
              TZDEFRULES);
        return false;
    }
    for (i = 0; i < nzones; ++i)
        if (zones[i].z_name != NULL &&
            strcmp(zones[i].z_name, fields[ZF_NAME]) == 0)
        {
            error(_("duplicate zone name %s"
                    " (file \"%s\", line %d)"),
                  fields[ZF_NAME],
                  zones[i].z_filename,
                  zones[i].z_linenum);
            return false;
        }
    return inzsub(fields, nfields, false);
}

inzsub()

static bool inzsub ( char **  fields, int  nfields, bool  iscont  )

static

Definition at line 1565 of file zic.c.

References _, ecpyalloc(), error(), filename, gethms(), growalloc(), linenum, namecheck(), rule::r_filename, rule::r_linenum, rule::r_loyear, rpytime(), rulesub(), warning(), zone::z_filename, zone::z_format, zone::z_format_specifier, zone::z_linenum, zone::z_name, zone::z_rule, zone::z_stdoff, zone::z_untilrule, zone::z_untiltime, ZF_FORMAT, ZF_NAME, ZF_RULE, ZF_STDOFF, ZF_TILDAY, ZF_TILMONTH, ZF_TILTIME, ZF_TILYEAR, ZFC_FORMAT, ZFC_RULE, ZFC_STDOFF, ZFC_TILDAY, ZFC_TILMONTH, ZFC_TILTIME, and ZFC_TILYEAR.

Referenced by inzcont(), and inzone().

{
    char       *cp;
    char       *cp1;
    static struct zone z;
    int         i_stdoff,
                i_rule,
                i_format;
    int         i_untilyear,
                i_untilmonth;
    int         i_untilday,
                i_untiltime;
    bool        hasuntil;

    if (iscont)
    {
        i_stdoff = ZFC_STDOFF;
        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 if (!namecheck(fields[ZF_NAME]))
        return false;
    else
    {
        i_stdoff = ZF_STDOFF;
        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_stdoff = gethms(fields[i_stdoff], _("invalid UT offset"));
    if ((cp = strchr(fields[i_format], '%')) != NULL)
    {
        if ((*++cp != 's' && *cp != 'z') || strchr(cp, '%')
            || strchr(fields[i_format], '/'))
        {
            error(_("invalid abbreviation format"));
            return false;
        }
    }
    z.z_rule = ecpyalloc(fields[i_rule]);
    z.z_format = cp1 = ecpyalloc(fields[i_format]);
    z.z_format_specifier = cp ? *cp : '\0';
    if (z.z_format_specifier == 'z')
    {
        if (noise)
            warning(_("format '%s' not handled by pre-2015 versions of zic"),
                    z.z_format);
        cp1[cp - fields[i_format]] = 's';
    }
    if (max_format_len < strlen(z.z_format))
        max_format_len = strlen(z.z_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 = growalloc(zones, sizeof *zones, nzones, &nzones_alloc);
    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;
}

is_alpha()

static bool is_alpha ( char  a )

static

Definition at line 3484 of file zic.c.

Referenced by doabbr(), and newabbr().

{
    switch (a)
    {
        default:
            return false;
        case 'A':
        case 'B':
        case 'C':
        case 'D':
        case 'E':
        case 'F':
        case 'G':
        case 'H':
        case 'I':
        case 'J':
        case 'K':
        case 'L':
        case 'M':
        case 'N':
        case 'O':
        case 'P':
        case 'Q':
        case 'R':
        case 'S':
        case 'T':
        case 'U':
        case 'V':
        case 'W':
        case 'X':
        case 'Y':
        case 'Z':
        case 'a':
        case 'b':
        case 'c':
        case 'd':
        case 'e':
        case 'f':
        case 'g':
        case 'h':
        case 'i':
        case 'j':
        case 'k':
        case 'l':
        case 'm':
        case 'n':
        case 'o':
        case 'p':
        case 'q':
        case 'r':
        case 's':
        case 't':
        case 'u':
        case 'v':
        case 'w':
        case 'x':
        case 'y':
        case 'z':
            return true;
    }
}

is_space()

static bool is_space ( char  a )

static

Definition at line 3466 of file zic.c.

Referenced by getfields().

{
    switch (a)
    {
        default:
            return false;
        case ' ':
        case '\f':
        case '\n':
        case '\r':
        case '\t':
        case '\v':
            return true;
    }
}

itsabbr()

static bool itsabbr ( const char *  abbr, const char *  word  )

static

Definition at line 3621 of file zic.c.

References lowerit(), and word().

Referenced by byword().

{
    if (lowerit(*abbr) != lowerit(*word))
        return false;
    ++word;
    while (*++abbr != '\0')
        do
        {
            if (*word == '\0')
                return false;
        } while (lowerit(*word++) != lowerit(*abbr));
    return true;
}

itsdir()

static bool itsdir ( char const *  name )

static

Definition at line 1104 of file zic.c.

References emalloc(), EOVERFLOW, free, S_ISDIR, stat::st_mode, and stat.

Referenced by dolink(), and mkdirs().

{
    struct stat st;
    int         res = stat(name, &st);
#ifdef S_ISDIR
    if (res == 0)
        return S_ISDIR(st.st_mode) != 0;
#endif
    if (res == 0 || errno == EOVERFLOW)
    {
        size_t      n = strlen(name);
        char       *nameslashdot = emalloc(n + 3);
        bool        dir;

        memcpy(nameslashdot, name, n);
        strcpy(&nameslashdot[n], &"/."[!(n && name[n - 1] != '/')]);
        dir = stat(nameslashdot, &st) == 0 || errno == EOVERFLOW;
        free(nameslashdot);
        return dir;
    }
    return false;
}

itssymlink()

static bool itssymlink ( char const *  name )

static

Definition at line 1129 of file zic.c.

References readlink.

Referenced by dolink().

{
#ifdef HAVE_SYMLINK
    char        c;

    return 0 <= readlink(name, &c, 1);
#else
    return false;
#endif
}

leapadd()

static void leapadd ( zic_t  t, int  correction, int  rolling  )

static

Definition at line 3401 of file zic.c.

References _, error(), EXIT_FAILURE, i, leapcnt, and TZ_MAX_LEAPS.

Referenced by inleap().

{
    int         i;

    if (TZ_MAX_LEAPS <= leapcnt)
    {
        error(_("too many leap seconds"));
        exit(EXIT_FAILURE);
    }
    for (i = 0; i < leapcnt; ++i)
        if (t <= trans[i])
            break;
    memmove(&trans[i + 1], &trans[i], (leapcnt - i) * sizeof *trans);
    memmove(&corr[i + 1], &corr[i], (leapcnt - i) * sizeof *corr);
    memmove(&roll[i + 1], &roll[i], (leapcnt - i) * sizeof *roll);
    trans[i] = t;
    corr[i] = correction;
    roll[i] = rolling;
    ++leapcnt;
}

limitrange()

static struct timerange limitrange ( struct timerange  r, zic_t  lo, zic_t  hi, zic_t const *  ats, unsigned char const *  types  )

static

Definition at line 2053 of file zic.c.

References timerange::defaulttype, types, and ZIC_MAX.

Referenced by writezone().

{
    while (0 < r.count && ats[r.base] < lo)
    {
        r.defaulttype = types[r.base];
        r.count--;
        r.base++;
    }
    while (0 < r.leapcount && trans[r.leapbase] < lo)
    {
        r.leapcount--;
        r.leapbase++;
    }

    if (hi < ZIC_MAX)
    {
        while (0 < r.count && hi + 1 < ats[r.base + r.count - 1])
            r.count--;
        while (0 < r.leapcount && hi + 1 < trans[r.leapbase + r.leapcount - 1])
            r.leapcount--;
    }

    return r;
}

link()

int link	(	const char *	target,
		const char *	linkname
	)

Referenced by mkdirs().

lowerit()

static char lowerit ( char  a )

static

Definition at line 3549 of file zic.c.

Referenced by ciequal(), ciprefix(), itsabbr(), and rulesub().

{
    switch (a)
    {
        default:
            return a;
        case 'A':
            return 'a';
        case 'B':
            return 'b';
        case 'C':
            return 'c';
        case 'D':
            return 'd';
        case 'E':
            return 'e';
        case 'F':
            return 'f';
        case 'G':
            return 'g';
        case 'H':
            return 'h';
        case 'I':
            return 'i';
        case 'J':
            return 'j';
        case 'K':
            return 'k';
        case 'L':
            return 'l';
        case 'M':
            return 'm';
        case 'N':
            return 'n';
        case 'O':
            return 'o';
        case 'P':
            return 'p';
        case 'Q':
            return 'q';
        case 'R':
            return 'r';
        case 'S':
            return 's';
        case 'T':
            return 't';
        case 'U':
            return 'u';
        case 'V':
            return 'v';
        case 'W':
            return 'w';
        case 'X':
            return 'x';
        case 'Y':
            return 'y';
        case 'Z':
            return 'z';
    }
}

main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 652 of file zic.c.

References _, adjleap(), associate(), change_directory(), close_file(), dolink(), eat(), error(), EXIT_FAILURE, EXIT_SUCCESS, fprintf, getopt(), i, infile(), nlinks, nzones, optarg, optind, outzone(), printf, S_IWGRP, S_IWOTH, generate_unaccent_rules::stdout, timerange_option(), TYPE_BIT, TZDEFAULT, TZDEFRULES, usage(), warning(), zone::z_name, and ZIC_BLOAT_DEFAULT.

{
    int         c,
                k;
    ptrdiff_t   i,
                j;
    bool        timerange_given = false;

#ifndef WIN32
    umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
#endif
    progname = argv[0];
    if (TYPE_BIT(zic_t) < 64)
    {
        fprintf(stderr, "%s: %s\n", progname,
                _("wild compilation-time specification of zic_t"));
        return EXIT_FAILURE;
    }
    for (k = 1; k < argc; k++)
        if (strcmp(argv[k], "--version") == 0)
        {
            printf("zic %s\n", PG_VERSION);
            close_file(stdout, NULL, NULL);
            return EXIT_SUCCESS;
        }
        else if (strcmp(argv[k], "--help") == 0)
        {
            usage(stdout, EXIT_SUCCESS);
        }
    while ((c = getopt(argc, argv, "b:d:l:L:p:Pr:st:vy:")) != EOF && c != -1)
        switch (c)
        {
            default:
                usage(stderr, EXIT_FAILURE);
            case 'b':
                if (strcmp(optarg, "slim") == 0)
                {
                    if (0 < bloat)
                        error(_("incompatible -b options"));
                    bloat = -1;
                }
                else if (strcmp(optarg, "fat") == 0)
                {
                    if (bloat < 0)
                        error(_("incompatible -b options"));
                    bloat = 1;
                }
                else
                    error(_("invalid option: -b '%s'"), optarg);
                break;
            case 'd':
                if (directory == NULL)
                    directory = strdup(optarg);
                else
                {
                    fprintf(stderr,
                            _("%s: More than one -d option specified\n"),
                            progname);
                    return EXIT_FAILURE;
                }
                break;
            case 'l':
                if (lcltime == NULL)
                    lcltime = strdup(optarg);
                else
                {
                    fprintf(stderr,
                            _("%s: More than one -l option specified\n"),
                            progname);
                    return EXIT_FAILURE;
                }
                break;
            case 'p':
                if (psxrules == NULL)
                    psxrules = strdup(optarg);
                else
                {
                    fprintf(stderr,
                            _("%s: More than one -p option specified\n"),
                            progname);
                    return EXIT_FAILURE;
                }
                break;
            case 't':
                if (tzdefault != NULL)
                {
                    fprintf(stderr,
                            _("%s: More than one -t option"
                              " specified\n"),
                            progname);
                    return EXIT_FAILURE;
                }
                tzdefault = optarg;
                break;
            case 'y':
                warning(_("-y ignored"));
                break;
            case 'L':
                if (leapsec == NULL)
                    leapsec = strdup(optarg);
                else
                {
                    fprintf(stderr,
                            _("%s: More than one -L option specified\n"),
                            progname);
                    return EXIT_FAILURE;
                }
                break;
            case 'v':
                noise = true;
                break;
            case 'P':
                print_abbrevs = true;
                print_cutoff = time(NULL);
                break;
            case 'r':
                if (timerange_given)
                {
                    fprintf(stderr,
                            _("%s: More than one -r option specified\n"),
                            progname);
                    return EXIT_FAILURE;
                }
                if (!timerange_option(optarg))
                {
                    fprintf(stderr,
                            _("%s: invalid time range: %s\n"),
                            progname, optarg);
                    return EXIT_FAILURE;
                }
                timerange_given = true;
                break;
            case 's':
                warning(_("-s ignored"));
                break;
        }
    if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
        usage(stderr, EXIT_FAILURE);    /* usage message by request */
    if (bloat == 0)
    {
        static char const bloat_default[] = ZIC_BLOAT_DEFAULT;

        if (strcmp(bloat_default, "slim") == 0)
            bloat = -1;
        else if (strcmp(bloat_default, "fat") == 0)
            bloat = 1;
        else
            abort();            /* Configuration error.  */
    }
    if (directory == NULL)
        directory = "data";
    if (tzdefault == NULL)
        tzdefault = TZDEFAULT;

    if (optind < argc && leapsec != NULL)
    {
        infile(leapsec);
        adjleap();
    }

    for (k = optind; k < argc; k++)
        infile(argv[k]);
    if (errors)
        return EXIT_FAILURE;
    associate();
    change_directory(directory);
    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_target, links[i].l_linkname, false);
        if (noise)
            for (j = 0; j < nlinks; ++j)
                if (strcmp(links[i].l_linkname,
                           links[j].l_target) == 0)
                    warning(_("link to link"));
    }
    if (lcltime != NULL)
    {
        eat(_("command line"), 1);
        dolink(lcltime, tzdefault, true);
    }
    if (psxrules != NULL)
    {
        eat(_("command line"), 1);
        dolink(psxrules, TZDEFRULES, true);
    }
    if (warnings && (ferror(stderr) || fclose(stderr) != 0))
        return EXIT_FAILURE;
    return errors ? EXIT_FAILURE : EXIT_SUCCESS;
}

memcheck()

static void* memcheck ( void *  ptr )

static

Definition at line 424 of file zic.c.

References memory_exhausted(), and strerror.

Referenced by ecpyalloc(), emalloc(), and erealloc().

{
    if (ptr == NULL)
        memory_exhausted(strerror(errno));
    return ptr;
}

memory_exhausted()

static void memory_exhausted ( const char *  msg )

static

Definition at line 409 of file zic.c.

References _, EXIT_FAILURE, and fprintf.

Referenced by growalloc(), memcheck(), and size_product().

{
    fprintf(stderr, _("%s: Memory exhausted: %s\n"), progname, msg);
    exit(EXIT_FAILURE);
}

mkdirs()

static void mkdirs ( char const *  argname, bool  ancestors  )

static

Definition at line 3946 of file zic.c.

References _, _dosmaperr(), ecpyalloc(), error(), EXIT_FAILURE, free, itsdir(), link(), mkdir, MKDIR_UMASK, name, and strerror.

Referenced by change_directory(), dolink(), and writezone().

{
    char       *name;
    char       *cp;

    cp = name = ecpyalloc(argname);

    /*
     * On MS-Windows systems, do not worry about drive letters or backslashes,
     * as this should suffice in practice.  Time zone names do not use drive
     * letters and backslashes.  If the -d option of zic does not name an
     * already-existing directory, it can use slashes to separate the
     * already-existing ancestor prefix from the to-be-created subdirectories.
     */

    /* Do not mkdir a root directory, as it must exist.  */
    while (*cp == '/')
        cp++;

    while (cp && ((cp = strchr(cp, '/')) || !ancestors))
    {
        if (cp)
            *cp = '\0';

        /*
         * Try to create it.  It's OK if creation fails because the directory
         * already exists, perhaps because some other process just created it.
         * For simplicity do not check first whether it already exists, as
         * that is checked anyway if the mkdir fails.
         */
        if (mkdir(name, MKDIR_UMASK) != 0)
        {
            /*
             * For speed, skip itsdir if errno == EEXIST.  Since mkdirs is
             * called only after open fails with ENOENT on a subfile, EEXIST
             * implies itsdir here.
             */
            int         err = errno;

            if (err != EEXIST && !itsdir(name))
            {
                error(_("%s: Cannot create directory %s: %s"),
                      progname, name, strerror(err));
                exit(EXIT_FAILURE);
            }
        }
        if (cp)
            *cp++ = '/';
    }
    free(name);
}

namecheck()

static bool namecheck ( const char *  name )

static

Definition at line 901 of file zic.c.

References _, componentcheck(), emalloc(), i, name, relname, and warning().

Referenced by inlink(), and inzsub().

{
    char const *cp;

    /* Benign characters in a portable file name.  */
    static char const benign[] =
    "-/_"
    "abcdefghijklmnopqrstuvwxyz"
    "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

    /*
     * Non-control chars in the POSIX portable character set, excluding the
     * benign characters.
     */
    static char const printable_and_not_benign[] =
    " !\"#$%&'()*+,.0123456789:;<=>?@[\\]^`{|}~";

    char const *component = name;

    for (cp = name; *cp; cp++)
    {
        unsigned char c = *cp;

        if (noise && !strchr(benign, c))
        {
            warning((strchr(printable_and_not_benign, c)
                     ? _("file name '%s' contains byte '%c'")
                     : _("file name '%s' contains byte '\\%o'")),
                    name, c);
        }
        if (c == '/')
        {
            if (!componentcheck(name, component, cp))
                return false;
            component = cp + 1;
        }
    }
    return componentcheck(name, component, cp);
}

newabbr()

static void newabbr ( const char *  abbr )

static

Definition at line 3908 of file zic.c.

References _, error(), EXIT_FAILURE, GRANDPARENTED, i, is_alpha(), TZ_MAX_CHARS, warning(), and ZIC_MAX_ABBR_LEN_WO_WARN.

Referenced by addtype().

{
    int         i;

    if (strcmp(string, GRANDPARENTED) != 0)
    {
        const char *cp;
        const char *mp;

        cp = string;
        mp = NULL;
        while (is_alpha(*cp) || ('0' <= *cp && *cp <= '9')
               || *cp == '-' || *cp == '+')
            ++cp;
        if (noise && cp - string < 3)
            mp = _("time zone abbreviation has fewer than 3 characters");
        if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN)
            mp = _("time zone abbreviation has too many characters");
        if (*cp != '\0')
            mp = _("time zone abbreviation differs from POSIX standard");
        if (mp != NULL)
            warning("%s (%s)", mp, string);
    }
    i = strlen(string) + 1;
    if (charcnt + i > TZ_MAX_CHARS)
    {
        error(_("too many, or too long, time zone abbreviations"));
        exit(EXIT_FAILURE);
    }
    strcpy(&chars[charcnt], string);
    charcnt += i;
}

oadd()

static zic_t oadd ( zic_t  t1, zic_t  t2  )

static

Definition at line 3762 of file zic.c.

References time_overflow(), ZIC_MAX, and ZIC_MIN.

Referenced by adjleap(), gethms(), getleapdatetime(), outzone(), and rpytime().

{
    if (t1 < 0 ? t2 < ZIC_MIN - t1 : ZIC_MAX - t1 < t2)
        time_overflow();
    return t1 + t2;
}

outzone()

static void outzone ( const struct zone *  zp, ptrdiff_t  ntzones  )

static

Definition at line 2944 of file zic.c.

References _, addtt(), addtype(), attype::at, attypes, compat, DC_DOM, doabbr(), attype::dontmerge, eat(), eats(), emalloc(), EPOCH_YEAR, error(), free, i, INITIALIZE, max_abbrvar_len, max_year, oadd(), rule::r_abbrvar, rule::r_dayofmonth, rule::r_dycode, rule::r_filename, rule::r_hiwasnum, rule::r_hiyear, rule::r_isdst, rule::r_linenum, rule::r_lowasnum, rule::r_loyear, rule::r_month, rule::r_save, rule::r_temp, rule::r_tod, rule::r_todisstd, rule::r_todisut, rule::r_todo, rpytime(), stringzone(), tadd(), timecnt, TM_JANUARY, generate_unaccent_rules::type, attype::type, updateminmax(), want_bloat(), warning(), writezone(), YEARSPERREPEAT, zone::z_filename, zone::z_format, zone::z_isdst, zone::z_linenum, zone::z_name, zone::z_nrules, zone::z_rules, zone::z_save, zone::z_stdoff, zone::z_untilrule, zone::z_untiltime, ZIC_MAX, ZIC_MIN, ZIC_VERSION, and ZIC_VERSION_PRE_2013.

Referenced by main().

{
    const struct zone *zp;
    struct rule *rp;
    ptrdiff_t   i,
                j;
    bool        usestart,
                useuntil;
    zic_t       starttime,
                untiltime;
    zic_t       stdoff;
    zic_t       save;
    zic_t       year;
    zic_t       startoff;
    bool        startttisstd;
    bool        startttisut;
    int         type;
    char       *startbuf;
    char       *ab;
    char       *envvar;
    int         max_abbr_len;
    int         max_envvar_len;
    bool        prodstic;       /* all rules are min to max */
    int         compat;
    bool        do_extend;
    char        version;
    ptrdiff_t   lastatmax = -1;
    zic_t       one = 1;
    zic_t       y2038_boundary = one << 31;
    zic_t       max_year0;
    int         defaulttype = -1;

    max_abbr_len = 2 + max_format_len + max_abbrvar_len;
    max_envvar_len = 2 * max_abbr_len + 5 * 9;
    startbuf = emalloc(max_abbr_len + 1);
    ab = emalloc(max_abbr_len + 1);
    envvar = emalloc(max_envvar_len + 1);
    INITIALIZE(untiltime);
    INITIALIZE(starttime);

    /*
     * Now. . .finally. . .generate some useful data!
     */
    timecnt = 0;
    typecnt = 0;
    charcnt = 0;
    prodstic = zonecount == 1;

    /*
     * Thanks to Earl Chew for noting the need to unconditionally initialize
     * startttisstd.
     */
    startttisstd = false;
    startttisut = false;
    min_year = max_year = EPOCH_YEAR;
    if (leapseen)
    {
        updateminmax(leapminyear);
        updateminmax(leapmaxyear + (leapmaxyear < ZIC_MAX));
    }
    for (i = 0; i < zonecount; ++i)
    {
        zp = &zpfirst[i];
        if (i < zonecount - 1)
            updateminmax(zp->z_untilrule.r_loyear);
        for (j = 0; j < zp->z_nrules; ++j)
        {
            rp = &zp->z_rules[j];
            if (rp->r_lowasnum)
                updateminmax(rp->r_loyear);
            if (rp->r_hiwasnum)
                updateminmax(rp->r_hiyear);
            if (rp->r_lowasnum || rp->r_hiwasnum)
                prodstic = false;
        }
    }

    /*
     * Generate lots of data if a rule can't cover all future times.
     */
    compat = stringzone(envvar, zpfirst, zonecount);
    version = compat < 2013 ? ZIC_VERSION_PRE_2013 : ZIC_VERSION;
    do_extend = compat < 0;
    if (noise)
    {
        if (!*envvar)
            warning("%s %s",
                    _("no POSIX environment variable for zone"),
                    zpfirst->z_name);
        else if (compat != 0)
        {
            /*
             * Circa-COMPAT clients, and earlier clients, might not work for
             * this zone when given dates before 1970 or after 2038.
             */
            warning(_("%s: pre-%d clients may mishandle"
                      " distant timestamps"),
                    zpfirst->z_name, compat);
        }
    }
    if (do_extend)
    {
        /*
         * Search through a couple of extra years past the obvious 400, to
         * avoid edge cases.  For example, suppose a non-POSIX rule applies
         * from 2012 onwards and has transitions in March and September, plus
         * some one-off transitions in November 2013.  If zic looked only at
         * the last 400 years, it would set max_year=2413, with the intent
         * that the 400 years 2014 through 2413 will be repeated.  The last
         * transition listed in the tzfile would be in 2413-09, less than 400
         * years after the last one-off transition in 2013-11.  Two years
         * might be overkill, but with the kind of edge cases available we're
         * not sure that one year would suffice.
         */
        enum
        {
        years_of_observations = YEARSPERREPEAT + 2};

        if (min_year >= ZIC_MIN + years_of_observations)
            min_year -= years_of_observations;
        else
            min_year = ZIC_MIN;
        if (max_year <= ZIC_MAX - years_of_observations)
            max_year += years_of_observations;
        else
            max_year = ZIC_MAX;

        /*
         * Regardless of any of the above, for a "proDSTic" zone which
         * specifies that its rules always have and always will be in effect,
         * we only need one cycle to define the zone.
         */
        if (prodstic)
        {
            min_year = 1900;
            max_year = min_year + years_of_observations;
        }
    }
    max_year0 = max_year;
    if (want_bloat())
    {
        /*
         * For the benefit of older systems, generate data from 1900 through
         * 2038.
         */
        if (min_year > 1900)
            min_year = 1900;
        if (max_year < 2038)
            max_year = 2038;
    }

    for (i = 0; i < zonecount; ++i)
    {
        struct rule *prevrp = NULL;

        /*
         * A guess that may well be corrected later.
         */
        save = 0;
        zp = &zpfirst[i];
        usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
        useuntil = i < (zonecount - 1);
        if (useuntil && zp->z_untiltime <= min_time)
            continue;
        stdoff = zp->z_stdoff;
        eat(zp->z_filename, zp->z_linenum);
        *startbuf = '\0';
        startoff = zp->z_stdoff;
        if (zp->z_nrules == 0)
        {
            save = zp->z_save;
            doabbr(startbuf, zp, NULL, zp->z_isdst, save, false);
            type = addtype(oadd(zp->z_stdoff, save),
                           startbuf, zp->z_isdst, startttisstd,
                           startttisut);
            if (usestart)
            {
                addtt(starttime, type);
                usestart = false;
            }
            else
                defaulttype = 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); The former TYPE field was
                 * also considered here.
                 */
                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;
                    if (rp->r_todo)
                    {
                        rp->r_temp = rpytime(rp, year);
                        rp->r_todo
                            = (rp->r_temp < y2038_boundary
                               || year <= max_year0);
                    }
                }
                for (;;)
                {
                    ptrdiff_t   k;
                    zic_t       jtime,
                                ktime;
                    zic_t       offset;

                    INITIALIZE(ktime);
                    if (useuntil)
                    {
                        /*
                         * Turn untiltime into UT assuming the current stdoff
                         * and save values.
                         */
                        untiltime = zp->z_untiltime;
                        if (!zp->z_untilrule.r_todisut)
                            untiltime = tadd(untiltime,
                                             -stdoff);
                        if (!zp->z_untilrule.r_todisstd)
                            untiltime = tadd(untiltime,
                                             -save);
                    }

                    /*
                     * 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_todisut ? 0 : stdoff;
                        if (!rp->r_todisstd)
                            offset = oadd(offset, save);
                        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;
                        }
                        else if (jtime == ktime)
                        {
                            char const *dup_rules_msg =
                            _("two rules for same instant");

                            eats(zp->z_filename, zp->z_linenum,
                                 rp->r_filename, rp->r_linenum);
                            warning("%s", dup_rules_msg);
                            rp = &zp->z_rules[k];
                            eats(zp->z_filename, zp->z_linenum,
                                 rp->r_filename, rp->r_linenum);
                            error("%s", dup_rules_msg);
                        }
                    }
                    if (k < 0)
                        break;  /* go on to next year */
                    rp = &zp->z_rules[k];
                    rp->r_todo = false;
                    if (useuntil && ktime >= untiltime)
                        break;
                    save = rp->r_save;
                    if (usestart && ktime == starttime)
                        usestart = false;
                    if (usestart)
                    {
                        if (ktime < starttime)
                        {
                            startoff = oadd(zp->z_stdoff,
                                            save);
                            doabbr(startbuf, zp,
                                   rp->r_abbrvar,
                                   rp->r_isdst,
                                   rp->r_save,
                                   false);
                            continue;
                        }
                        if (*startbuf == '\0'
                            && startoff == oadd(zp->z_stdoff,
                                                save))
                        {
                            doabbr(startbuf,
                                   zp,
                                   rp->r_abbrvar,
                                   rp->r_isdst,
                                   rp->r_save,
                                   false);
                        }
                    }
                    eats(zp->z_filename, zp->z_linenum,
                         rp->r_filename, rp->r_linenum);
                    doabbr(ab, zp, rp->r_abbrvar,
                           rp->r_isdst, rp->r_save, false);
                    offset = oadd(zp->z_stdoff, rp->r_save);
                    if (!want_bloat() && !useuntil && !do_extend
                        && prevrp
                        && rp->r_hiyear == ZIC_MAX
                        && prevrp->r_hiyear == ZIC_MAX)
                        break;
                    type = addtype(offset, ab, rp->r_isdst,
                                   rp->r_todisstd, rp->r_todisut);
                    if (defaulttype < 0 && !rp->r_isdst)
                        defaulttype = type;
                    if (rp->r_hiyear == ZIC_MAX
                        && !(0 <= lastatmax
                             && ktime < attypes[lastatmax].at))
                        lastatmax = timecnt;
                    addtt(ktime, type);
                    prevrp = rp;
                }
            }
        if (usestart)
        {
            if (*startbuf == '\0' &&
                zp->z_format != NULL &&
                strchr(zp->z_format, '%') == NULL &&
                strchr(zp->z_format, '/') == NULL)
                strcpy(startbuf, zp->z_format);
            eat(zp->z_filename, zp->z_linenum);
            if (*startbuf == '\0')
                error(_("cannot determine time zone abbreviation to use just after until time"));
            else
            {
                bool        isdst = startoff != zp->z_stdoff;

                type = addtype(startoff, startbuf, isdst,
                               startttisstd, startttisut);
                if (defaulttype < 0 && !isdst)
                    defaulttype = type;
                addtt(starttime, type);
            }
        }

        /*
         * Now we may get to set starttime for the next zone line.
         */
        if (useuntil)
        {
            startttisstd = zp->z_untilrule.r_todisstd;
            startttisut = zp->z_untilrule.r_todisut;
            starttime = zp->z_untiltime;
            if (!startttisstd)
                starttime = tadd(starttime, -save);
            if (!startttisut)
                starttime = tadd(starttime, -stdoff);
        }
    }
    if (defaulttype < 0)
        defaulttype = 0;
    if (0 <= lastatmax)
        attypes[lastatmax].dontmerge = true;
    if (do_extend)
    {
        /*
         * If we're extending the explicitly listed observations for 400 years
         * because we can't fill the POSIX-TZ field, check whether we actually
         * ended up explicitly listing observations through that period.  If
         * there aren't any near the end of the 400-year period, add a
         * redundant one at the end of the final year, to make it clear that
         * we are claiming to have definite knowledge of the lack of
         * transitions up to that point.
         */
        struct rule xr;
        struct attype *lastat;

        xr.r_month = TM_JANUARY;
        xr.r_dycode = DC_DOM;
        xr.r_dayofmonth = 1;
        xr.r_tod = 0;
        for (lastat = attypes, i = 1; i < timecnt; i++)
            if (attypes[i].at > lastat->at)
                lastat = &attypes[i];
        if (!lastat || lastat->at < rpytime(&xr, max_year - 1))
        {
            addtt(rpytime(&xr, max_year + 1),
                  lastat ? lastat->type : defaulttype);
            attypes[timecnt - 1].dontmerge = true;
        }
    }
    writezone(zpfirst->z_name, envvar, version, defaulttype);
    free(startbuf);
    free(ab);
    free(envvar);
}

puttzcode()

static void puttzcode ( const int32  val, FILE *const  fp  )

static

Definition at line 2012 of file zic.c.

References buf, and convert().

Referenced by puttzcodepass(), and writezone().

{
    char        buf[4];

    convert(val, buf);
    fwrite(buf, sizeof buf, 1, fp);
}

puttzcodepass()

static void puttzcodepass ( zic_t  val, FILE *  fp, int  pass  )

static

Definition at line 2021 of file zic.c.

References buf, convert64(), and puttzcode().

Referenced by writezone().

{
    if (pass == 1)
        puttzcode(val, fp);
    else
    {
        char        buf[8];

        convert64(val, buf);
        fwrite(buf, sizeof buf, 1, fp);
    }
}

rcomp()

static int rcomp ( const void *  cp1, const void *  cp2  )

static

Definition at line 1149 of file zic.c.

References rule::r_name.

Referenced by associate().

{
    return strcmp(((const struct rule *) cp1)->r_name,
                  ((const struct rule *) cp2)->r_name);
}

rpytime()

static zic_t rpytime ( const struct rule *  rp, zic_t  wantedy  )

static

Definition at line 3799 of file zic.c.

References _, DC_DOWGEQ, DC_DOWLEQ, EPOCH_WDAY, EPOCH_YEAR, error(), EXIT_FAILURE, i, isleap, LDAYSPERWEEK, max_time, min_time, oadd(), rule::r_dayofmonth, rule::r_dycode, rule::r_month, rule::r_tod, rule::r_wday, SECSPERDAY, SECSPERREPEAT, tadd(), TM_FEBRUARY, TM_JANUARY, warning(), YEARSPERREPEAT, ZIC_MAX, and ZIC_MIN.

Referenced by inzsub(), and outzone().

{
    int         m,
                i;
    zic_t       dayoff;         /* with a nod to Margaret O. */
    zic_t       t,
                y;

    if (wantedy == ZIC_MIN)
        return min_time;
    if (wantedy == ZIC_MAX)
        return max_time;
    dayoff = 0;
    m = TM_JANUARY;
    y = EPOCH_YEAR;
    if (y < wantedy)
    {
        wantedy -= y;
        dayoff = (wantedy / YEARSPERREPEAT) * (SECSPERREPEAT / SECSPERDAY);
        wantedy %= YEARSPERREPEAT;
        wantedy += y;
    }
    else if (wantedy < 0)
    {
        dayoff = (wantedy / YEARSPERREPEAT) * (SECSPERREPEAT / SECSPERDAY);
        wantedy %= YEARSPERREPEAT;
    }
    while (wantedy != y)
    {
        if (wantedy > y)
        {
            i = len_years[isleap(y)];
            ++y;
        }
        else
        {
            --y;
            i = -len_years[isleap(y)];
        }
        dayoff = oadd(dayoff, i);
    }
    while (m != rp->r_month)
    {
        i = len_months[isleap(y)][m];
        dayoff = oadd(dayoff, 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"));
            exit(EXIT_FAILURE);
        }
    }
    --i;
    dayoff = oadd(dayoff, i);
    if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ)
    {
        zic_t       wday;

#define LDAYSPERWEEK    ((zic_t) DAYSPERWEEK)
        wday = 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 != rp->r_wday)
            if (rp->r_dycode == DC_DOWGEQ)
            {
                dayoff = oadd(dayoff, 1);
                if (++wday >= LDAYSPERWEEK)
                    wday = 0;
                ++i;
            }
            else
            {
                dayoff = oadd(dayoff, -1);
                if (--wday < 0)
                    wday = LDAYSPERWEEK - 1;
                --i;
            }
        if (i < 0 || i >= len_months[isleap(y)][m])
        {
            if (noise)
                warning(_("rule goes past start/end of month; \
will not work with pre-2004 versions of zic"));
        }
    }
    if (dayoff < min_time / SECSPERDAY)
        return min_time;
    if (dayoff > max_time / SECSPERDAY)
        return max_time;
    t = (zic_t) dayoff * SECSPERDAY;
    return tadd(t, rp->r_tod);
}

rule_cmp()

static int rule_cmp ( struct rule const *  a, struct rule const *  b  )

static

Definition at line 2795 of file zic.c.

References rule::r_dayofmonth, rule::r_hiyear, and rule::r_month.

Referenced by stringzone().

{
    if (!a)
        return -!!b;
    if (!b)
        return 1;
    if (a->r_hiyear != b->r_hiyear)
        return a->r_hiyear < b->r_hiyear ? -1 : 1;
    if (a->r_month - b->r_month != 0)
        return a->r_month - b->r_month;
    return a->r_dayofmonth - b->r_dayofmonth;
}

rulesub()

static void rulesub ( struct rule *  rp, const char *  loyearp, const char *  hiyearp, const char *  typep, const char *  monthp, const char *  dayp, const char *  timep  )

static

Definition at line 1821 of file zic.c.

References _, byword(), DC_DOM, DC_DOWGEQ, DC_DOWLEQ, ecpyalloc(), error(), EXIT_FAILURE, fprintf, free, gethms(), lookup::l_value, lowerit(), rule::r_dayofmonth, rule::r_dycode, rule::r_hiwasnum, rule::r_hiyear, rule::r_lowasnum, rule::r_loyear, rule::r_month, rule::r_tod, rule::r_todisstd, rule::r_todisut, rule::r_wday, YR_MAXIMUM, YR_MINIMUM, YR_ONLY, ZIC_MAX, and ZIC_MIN.

Referenced by inrule(), and inzsub().

{
    const struct lookup *lp;
    const char *cp;
    char       *dp;
    char       *ep;
    char        xs;

    /* PG: year_tmp is to avoid sscanf portability issues */
    int         year_tmp;

    if ((lp = byword(monthp, mon_names)) == NULL)
    {
        error(_("invalid month name"));
        return;
    }
    rp->r_month = lp->l_value;
    rp->r_todisstd = false;
    rp->r_todisut = false;
    dp = ecpyalloc(timep);
    if (*dp != '\0')
    {
        ep = dp + strlen(dp) - 1;
        switch (lowerit(*ep))
        {
            case 's':           /* Standard */
                rp->r_todisstd = true;
                rp->r_todisut = false;
                *ep = '\0';
                break;
            case 'w':           /* Wall */
                rp->r_todisstd = false;
                rp->r_todisut = false;
                *ep = '\0';
                break;
            case 'g':           /* Greenwich */
            case 'u':           /* Universal */
            case 'z':           /* Zulu */
                rp->r_todisstd = true;
                rp->r_todisut = true;
                *ep = '\0';
                break;
        }
    }
    rp->r_tod = gethms(dp, _("invalid time of day"));
    free(dp);

    /*
     * Year work.
     */
    cp = loyearp;
    lp = byword(cp, begin_years);
    rp->r_lowasnum = lp == NULL;
    if (!rp->r_lowasnum)
        switch (lp->l_value)
        {
            case YR_MINIMUM:
                rp->r_loyear = ZIC_MIN;
                break;
            case YR_MAXIMUM:
                rp->r_loyear = ZIC_MAX;
                break;
            default:            /* "cannot happen" */
                fprintf(stderr,
                        _("%s: panic: Invalid l_value %d\n"),
                        progname, lp->l_value);
                exit(EXIT_FAILURE);
        }
    else if (sscanf(cp, "%d%c", &year_tmp, &xs) == 1)
        rp->r_loyear = year_tmp;
    else
    {
        error(_("invalid starting year"));
        return;
    }
    cp = hiyearp;
    lp = byword(cp, end_years);
    rp->r_hiwasnum = lp == NULL;
    if (!rp->r_hiwasnum)
        switch (lp->l_value)
        {
            case YR_MINIMUM:
                rp->r_hiyear = ZIC_MIN;
                break;
            case YR_MAXIMUM:
                rp->r_hiyear = ZIC_MAX;
                break;
            case YR_ONLY:
                rp->r_hiyear = rp->r_loyear;
                break;
            default:            /* "cannot happen" */
                fprintf(stderr,
                        _("%s: panic: Invalid l_value %d\n"),
                        progname, lp->l_value);
                exit(EXIT_FAILURE);
        }
    else if (sscanf(cp, "%d%c", &year_tmp, &xs) == 1)
        rp->r_hiyear = year_tmp;
    else
    {
        error(_("invalid ending year"));
        return;
    }
    if (rp->r_loyear > rp->r_hiyear)
    {
        error(_("starting year greater than ending year"));
        return;
    }
    if (*typep != '\0')
    {
        error(_("year type \"%s\" is unsupported; use \"-\" instead"),
              typep);
        return;
    }

    /*
     * Day work. Accept things such as: 1 lastSunday last-Sunday
     * (undocumented; warn about this) 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, '<')) != NULL)
            rp->r_dycode = DC_DOWLEQ;
        else if ((ep = strchr(dp, '>')) != NULL)
            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"));
                free(dp);
                return;
            }
            if ((lp = byword(dp, wday_names)) == NULL)
            {
                error(_("invalid weekday name"));
                free(dp);
                return;
            }
            rp->r_wday = lp->l_value;
        }
        if (sscanf(ep, "%d%c", &rp->r_dayofmonth, &xs) != 1 ||
            rp->r_dayofmonth <= 0 ||
            (rp->r_dayofmonth > len_months[1][rp->r_month]))
        {
            error(_("invalid day of month"));
            free(dp);
            return;
        }
    }
    free(dp);
}

size_product()

static size_t size_product ( size_t  nitems, size_t  itemsize  )

static

Definition at line 416 of file zic.c.

References _, and memory_exhausted().

Referenced by getfields(), growalloc(), and writezone().

{
    if (SIZE_MAX / itemsize < nitems)
        memory_exhausted(_("size overflow"));
    return nitems * itemsize;
}

stringoffset()

static int stringoffset ( char *  result, zic_t  offset  )

static

Definition at line 2680 of file zic.c.

References DAYSPERWEEK, HOURSPERDAY, MINSPERHOUR, SECSPERMIN, and sprintf.

Referenced by stringrule(), and stringzone().

{
    int         hours;
    int         minutes;
    int         seconds;
    bool        negative = offset < 0;
    int         len = negative;

    if (negative)
    {
        offset = -offset;
        result[0] = '-';
    }
    seconds = offset % SECSPERMIN;
    offset /= SECSPERMIN;
    minutes = offset % MINSPERHOUR;
    offset /= MINSPERHOUR;
    hours = offset;
    if (hours >= HOURSPERDAY * DAYSPERWEEK)
    {
        result[0] = '\0';
        return 0;
    }
    len += sprintf(result + len, "%d", hours);
    if (minutes != 0 || seconds != 0)
    {
        len += sprintf(result + len, ":%02d", minutes);
        if (seconds != 0)
            len += sprintf(result + len, ":%02d", seconds);
    }
    return len;
}

stringrule()

static int stringrule ( char *  result, struct rule *const  rp, zic_t  save, zic_t  stdoff  )

static

Definition at line 2714 of file zic.c.

References compat, DAYSPERWEEK, DC_DOM, DC_DOWGEQ, DC_DOWLEQ, MINSPERHOUR, rule::r_dayofmonth, rule::r_dycode, rule::r_isdst, rule::r_month, rule::r_tod, rule::r_todisstd, rule::r_todisut, rule::r_wday, SECSPERDAY, SECSPERMIN, sprintf, stringoffset(), and TM_FEBRUARY.

Referenced by stringzone().

{
    zic_t       tod = rp->r_tod;
    int         compat = 0;

    if (rp->r_dycode == DC_DOM)
    {
        int         month,
                    total;

        if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY)
            return -1;
        total = 0;
        for (month = 0; month < rp->r_month; ++month)
            total += len_months[0][month];
        /* Omit the "J" in Jan and Feb, as that's shorter.  */
        if (rp->r_month <= 1)
            result += sprintf(result, "%d", total + rp->r_dayofmonth - 1);
        else
            result += sprintf(result, "J%d", total + rp->r_dayofmonth);
    }
    else
    {
        int         week;
        int         wday = rp->r_wday;
        int         wdayoff;

        if (rp->r_dycode == DC_DOWGEQ)
        {
            wdayoff = (rp->r_dayofmonth - 1) % DAYSPERWEEK;
            if (wdayoff)
                compat = 2013;
            wday -= wdayoff;
            tod += wdayoff * SECSPERDAY;
            week = 1 + (rp->r_dayofmonth - 1) / DAYSPERWEEK;
        }
        else if (rp->r_dycode == DC_DOWLEQ)
        {
            if (rp->r_dayofmonth == len_months[1][rp->r_month])
                week = 5;
            else
            {
                wdayoff = rp->r_dayofmonth % DAYSPERWEEK;
                if (wdayoff)
                    compat = 2013;
                wday -= wdayoff;
                tod += wdayoff * SECSPERDAY;
                week = rp->r_dayofmonth / DAYSPERWEEK;
            }
        }
        else
            return -1;          /* "cannot happen" */
        if (wday < 0)
            wday += DAYSPERWEEK;
        result += sprintf(result, "M%d.%d.%d",
                          rp->r_month + 1, week, wday);
    }
    if (rp->r_todisut)
        tod += stdoff;
    if (rp->r_todisstd && !rp->r_isdst)
        tod += save;
    if (tod != 2 * SECSPERMIN * MINSPERHOUR)
    {
        *result++ = '/';
        if (!stringoffset(result, tod))
            return -1;
        if (tod < 0)
        {
            if (compat < 2013)
                compat = 2013;
        }
        else if (SECSPERDAY <= tod)
        {
            if (compat < 1994)
                compat = 1994;
        }
    }
    return compat;
}

stringzone()

static int stringzone ( char *  result, struct zone const *  zpfirst, ptrdiff_t  zonecount  )

static

Definition at line 2809 of file zic.c.

References compat, DC_DOM, doabbr(), i, MINSPERHOUR, rule::r_abbrvar, rule::r_dayofmonth, rule::r_dycode, rule::r_hiwasnum, rule::r_hiyear, rule::r_isdst, rule::r_month, rule::r_save, rule::r_tod, rule::r_todisstd, rule::r_todisut, rule_cmp(), SECSPERDAY, SECSPERMIN, stringoffset(), stringrule(), TM_DECEMBER, TM_JANUARY, zone::z_isdst, zone::z_nrules, zone::z_rules, zone::z_stdoff, and ZIC_MAX.

Referenced by outzone().

{
    const struct zone *zp;
    struct rule *rp;
    struct rule *stdrp;
    struct rule *dstrp;
    ptrdiff_t   i;
    const char *abbrvar;
    int         compat = 0;
    int         c;
    size_t      len;
    int         offsetlen;
    struct rule stdr,
                dstr;

    result[0] = '\0';

    /*
     * Internet RFC 8536 section 5.1 says to use an empty TZ string if future
     * timestamps are truncated.
     */
    if (hi_time < max_time)
        return -1;

    zp = zpfirst + zonecount - 1;
    stdrp = dstrp = NULL;
    for (i = 0; i < zp->z_nrules; ++i)
    {
        rp = &zp->z_rules[i];
        if (rp->r_hiwasnum || rp->r_hiyear != ZIC_MAX)
            continue;
        if (!rp->r_isdst)
        {
            if (stdrp == NULL)
                stdrp = rp;
            else
                return -1;
        }
        else
        {
            if (dstrp == NULL)
                dstrp = rp;
            else
                return -1;
        }
    }
    if (stdrp == NULL && dstrp == NULL)
    {
        /*
         * There are no rules running through "max". Find the latest std rule
         * in stdabbrrp and latest rule of any type in stdrp.
         */
        struct rule *stdabbrrp = NULL;

        for (i = 0; i < zp->z_nrules; ++i)
        {
            rp = &zp->z_rules[i];
            if (!rp->r_isdst && rule_cmp(stdabbrrp, rp) < 0)
                stdabbrrp = rp;
            if (rule_cmp(stdrp, rp) < 0)
                stdrp = rp;
        }
        if (stdrp != NULL && stdrp->r_isdst)
        {
            /* Perpetual DST.  */
            dstr.r_month = TM_JANUARY;
            dstr.r_dycode = DC_DOM;
            dstr.r_dayofmonth = 1;
            dstr.r_tod = 0;
            dstr.r_todisstd = dstr.r_todisut = false;
            dstr.r_isdst = stdrp->r_isdst;
            dstr.r_save = stdrp->r_save;
            dstr.r_abbrvar = stdrp->r_abbrvar;
            stdr.r_month = TM_DECEMBER;
            stdr.r_dycode = DC_DOM;
            stdr.r_dayofmonth = 31;
            stdr.r_tod = SECSPERDAY + stdrp->r_save;
            stdr.r_todisstd = stdr.r_todisut = false;
            stdr.r_isdst = false;
            stdr.r_save = 0;
            stdr.r_abbrvar
                = (stdabbrrp ? stdabbrrp->r_abbrvar : "");
            dstrp = &dstr;
            stdrp = &stdr;
        }
    }
    if (stdrp == NULL && (zp->z_nrules != 0 || zp->z_isdst))
        return -1;
    abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar;
    len = doabbr(result, zp, abbrvar, false, 0, true);
    offsetlen = stringoffset(result + len, -zp->z_stdoff);
    if (!offsetlen)
    {
        result[0] = '\0';
        return -1;
    }
    len += offsetlen;
    if (dstrp == NULL)
        return compat;
    len += doabbr(result + len, zp, dstrp->r_abbrvar,
                  dstrp->r_isdst, dstrp->r_save, true);
    if (dstrp->r_save != SECSPERMIN * MINSPERHOUR)
    {
        offsetlen = stringoffset(result + len,
                                 -(zp->z_stdoff + dstrp->r_save));
        if (!offsetlen)
        {
            result[0] = '\0';
            return -1;
        }
        len += offsetlen;
    }
    result[len++] = ',';
    c = stringrule(result + len, dstrp, dstrp->r_save, zp->z_stdoff);
    if (c < 0)
    {
        result[0] = '\0';
        return -1;
    }
    if (compat < c)
        compat = c;
    len += strlen(result + len);
    result[len++] = ',';
    c = stringrule(result + len, stdrp, dstrp->r_save, zp->z_stdoff);
    if (c < 0)
    {
        result[0] = '\0';
        return -1;
    }
    if (compat < c)
        compat = c;
    return compat;
}

tadd()

static zic_t tadd ( zic_t  t1, zic_t  t2  )

static

Definition at line 3770 of file zic.c.

References max_time, min_time, and time_overflow().

Referenced by adjleap(), getleapdatetime(), outzone(), rpytime(), and writezone().

{
    if (t1 < 0)
    {
        if (t2 < min_time - t1)
        {
            if (t1 != min_time)
                time_overflow();
            return min_time;
        }
    }
    else
    {
        if (max_time - t1 < t2)
        {
            if (t1 != max_time)
                time_overflow();
            return max_time;
        }
    }
    return t1 + t2;
}

time_overflow()

static void time_overflow ( void  )

static

Definition at line 3755 of file zic.c.

References _, error(), and EXIT_FAILURE.

Referenced by oadd(), and tadd().

{
    error(_("time overflow"));
    exit(EXIT_FAILURE);
}

timerange_option()

static bool timerange_option ( char *  timerange )

static

Definition at line 600 of file zic.c.

References max_time, min_time, PG_INT64_MAX, PG_INT64_MIN, and strtoimax.

Referenced by main().

{
    int64       lo = min_time,
                hi = max_time;
    char       *lo_end = timerange,
               *hi_end;

    if (*timerange == '@')
    {
        errno = 0;
        lo = strtoimax(timerange + 1, &lo_end, 10);
        if (lo_end == timerange + 1 || (lo == PG_INT64_MAX && errno == ERANGE))
            return false;
    }
    hi_end = lo_end;
    if (lo_end[0] == '/' && lo_end[1] == '@')
    {
        errno = 0;
        hi = strtoimax(lo_end + 2, &hi_end, 10);
        if (hi_end == lo_end + 2 || hi == PG_INT64_MIN)
            return false;
        hi -= !(hi == PG_INT64_MAX && errno == ERANGE);
    }
    if (*hi_end || hi < lo || max_time < lo || hi < min_time)
        return false;
    lo_time = lo < min_time ? min_time : lo;
    hi_time = max_time < hi ? max_time : hi;
    return true;
}

updateminmax()

static void updateminmax ( const zic_t  x )

static

Definition at line 2671 of file zic.c.

Referenced by outzone().

{
    if (min_year > x)
        min_year = x;
    if (max_year < x)
        max_year = x;
}

usage()

static void usage ( FILE *  stream, int  status  )

static

Definition at line 541 of file zic.c.

References _, close_file(), EXIT_SUCCESS, and fprintf.

Referenced by main().

{
    fprintf(stream,
            _("%s: usage is %s [ --version ] [ --help ] [ -v ] [ -P ] \\\n"
              "\t[ -b {slim|fat} ] [ -d directory ] [ -l localtime ]"
              " [ -L leapseconds ] \\\n"
              "\t[ -p posixrules ] [ -r '[@lo][/@hi]' ] [ -t localtime-link ] \\\n"
              "\t[ filename ... ]\n\n"
              "Report bugs to %s.\n"),
            progname, progname, PACKAGE_BUGREPORT);
    if (status == EXIT_SUCCESS)
        close_file(stream, NULL, NULL);
    exit(status);
}

verror()

static void verror ( const char *  string, va_list  args  )

static

Definition at line 486 of file zic.c.

References _, fprintf, and vfprintf.

Referenced by error(), and warning().

{
    /*
     * Match the format of "cc" to allow sh users to zic ... 2>&1 | error -t
     * "*" -v on BSD systems.
     */
    if (filename)
        fprintf(stderr, _("\"%s\", line %d: "), filename, linenum);
    vfprintf(stderr, string, args);
    if (rfilename != NULL)
        fprintf(stderr, _(" (rule from \"%s\", line %d)"),
                rfilename, rlinenum);
    fprintf(stderr, "\n");
}

want_bloat()

static bool want_bloat ( void  )

static

Definition at line 642 of file zic.c.

References bloat.

Referenced by addtype(), outzone(), and writezone().

{
    return 0 <= bloat;
}

warning()

static void warning ( const char *  string,   ...  )

static

Definition at line 513 of file zic.c.

References _, generate_unaccent_rules::args, fprintf, and verror().

Referenced by adjleap(), associate(), byword(), componentcheck(), dolink(), gethms(), inzsub(), main(), namecheck(), newabbr(), outzone(), rpytime(), and writezone().

{
    va_list     args;

    fprintf(stderr, _("warning: "));
    va_start(args, string);
    verror(string, args);
    va_end(args);
    warnings = true;
}

writezone()

static void writezone ( const char *const  name, const char *const  string, char  version, int  defaulttype  )

static

Definition at line 2080 of file zic.c.

References _, addtype(), attype::at, atcomp(), attypes, timerange::base, close_file(), convert(), timerange::count, timerange::defaulttype, DO, emalloc(), error(), EXIT_FAILURE, fprintf, free, i, INT64_FORMAT, timerange::leapbase, leapcnt, timerange::leapcount, limitrange(), lo_time, max_time, MAXALIGN, mkdirs(), PG_INT32_MAX, PG_INT32_MIN, puttzcode(), puttzcodepass(), qsort, size_product(), generate_unaccent_rules::stdout, strerror, tadd(), timecnt, tm, generate_unaccent_rules::type, attype::type, typecnt, types, TZ_MAGIC, TZ_MAX_CHARS, TZ_MAX_TIMES, TZ_MAX_TYPES, tzhead::tzh_charcnt, tzhead::tzh_leapcnt, tzhead::tzh_magic, tzhead::tzh_timecnt, tzhead::tzh_ttisstdcnt, tzhead::tzh_ttisutcnt, tzhead::tzh_typecnt, tzhead::tzh_version, want_bloat(), warning(), WORK_AROUND_QTBUG_53071, and ZIC_MAX.

Referenced by outzone().

{
    FILE       *fp;
    ptrdiff_t   i,
                j;
    int         pass;
    static const struct tzhead tzh0;
    static struct tzhead tzh;
    bool        dir_checked = false;
    zic_t       one = 1;
    zic_t       y2038_boundary = one << 31;
    ptrdiff_t   nats = timecnt + WORK_AROUND_QTBUG_53071;

    /*
     * Allocate the ATS and TYPES arrays via a single malloc, as this is a bit
     * faster.
     */
    zic_t      *ats = emalloc(MAXALIGN(size_product(nats, sizeof *ats + 1)));
    void       *typesptr = ats + nats;
    unsigned char *types = typesptr;
    struct timerange rangeall,
                range32,
                range64;

    /*
     * Sort.
     */
    if (timecnt > 1)
        qsort(attypes, timecnt, sizeof *attypes, atcomp);

    /*
     * Optimize.
     */
    {
        ptrdiff_t   fromi,
                    toi;

        toi = 0;
        fromi = 0;
        for (; fromi < timecnt; ++fromi)
        {
            if (toi != 0
                && ((attypes[fromi].at
                     + utoffs[attypes[toi - 1].type])
                    <= (attypes[toi - 1].at
                        + utoffs[toi == 1 ? 0
                                 : attypes[toi - 2].type])))
            {
                attypes[toi - 1].type =
                    attypes[fromi].type;
                continue;
            }
            if (toi == 0
                || attypes[fromi].dontmerge
                || (utoffs[attypes[toi - 1].type]
                    != utoffs[attypes[fromi].type])
                || (isdsts[attypes[toi - 1].type]
                    != isdsts[attypes[fromi].type])
                || (desigidx[attypes[toi - 1].type]
                    != desigidx[attypes[fromi].type]))
                attypes[toi++] = attypes[fromi];
        }
        timecnt = toi;
    }

    if (noise && timecnt > 1200)
    {
        if (timecnt > TZ_MAX_TIMES)
            warning(_("reference clients mishandle"
                      " more than %d transition times"),
                    TZ_MAX_TIMES);
        else
            warning(_("pre-2014 clients may mishandle"
                      " more than 1200 transition times"));
    }

    /*
     * Transfer.
     */
    for (i = 0; i < timecnt; ++i)
    {
        ats[i] = attypes[i].at;
        types[i] = attypes[i].type;
    }

    /*
     * Correct for leap seconds.
     */
    for (i = 0; i < timecnt; ++i)
    {
        j = leapcnt;
        while (--j >= 0)
            if (ats[i] > trans[j] - corr[j])
            {
                ats[i] = tadd(ats[i], corr[j]);
                break;
            }
    }

    /*
     * Work around QTBUG-53071 for timestamps less than y2038_boundary - 1, by
     * inserting a no-op transition at time y2038_boundary - 1. This works
     * only for timestamps before the boundary, which should be good enough in
     * practice as QTBUG-53071 should be long-dead by 2038.  Do this after
     * correcting for leap seconds, as the idea is to insert a transition just
     * before 32-bit pg_time_t rolls around, and this occurs at a slightly
     * different moment if transitions are leap-second corrected.
     */
    if (WORK_AROUND_QTBUG_53071 && timecnt != 0 && want_bloat()
        && ats[timecnt - 1] < y2038_boundary - 1 && strchr(string, '<'))
    {
        ats[timecnt] = y2038_boundary - 1;
        types[timecnt] = types[timecnt - 1];
        timecnt++;
    }

    rangeall.defaulttype = defaulttype;
    rangeall.base = rangeall.leapbase = 0;
    rangeall.count = timecnt;
    rangeall.leapcount = leapcnt;
    range64 = limitrange(rangeall, lo_time, hi_time, ats, types);
    range32 = limitrange(range64, PG_INT32_MIN, PG_INT32_MAX, ats, types);

    /*
     * Remove old file, if any, to snap links.
     */
    if (remove(name) == 0)
        dir_checked = true;
    else if (errno != ENOENT)
    {
        const char *e = strerror(errno);

        fprintf(stderr, _("%s: Cannot remove %s/%s: %s\n"),
                progname, directory, name, e);
        exit(EXIT_FAILURE);
    }
    fp = fopen(name, "wb");
    if (!fp)
    {
        int         fopen_errno = errno;

        if (fopen_errno == ENOENT && !dir_checked)
        {
            mkdirs(name, true);
            fp = fopen(name, "wb");
            fopen_errno = errno;
        }
        if (!fp)
        {
            fprintf(stderr, _("%s: Cannot create %s/%s: %s\n"),
                    progname, directory, name, strerror(fopen_errno));
            exit(EXIT_FAILURE);
        }
    }
    for (pass = 1; pass <= 2; ++pass)
    {
        ptrdiff_t   thistimei,
                    thistimecnt,
                    thistimelim;
        int         thisleapi,
                    thisleapcnt,
                    thisleaplim;
        int         currenttype,
                    thisdefaulttype;
        bool        locut,
                    hicut;
        zic_t       lo;
        int         old0;
        char        omittype[TZ_MAX_TYPES];
        int         typemap[TZ_MAX_TYPES];
        int         thistypecnt,
                    stdcnt,
                    utcnt;
        char        thischars[TZ_MAX_CHARS];
        int         thischarcnt;
        bool        toomanytimes;
        int         indmap[TZ_MAX_CHARS];

        if (pass == 1)
        {
            /*
             * Arguably the default time type in the 32-bit data should be
             * range32.defaulttype, which is suited for timestamps just before
             * PG_INT32_MIN.  However, zic traditionally used the time type of
             * the indefinite past instead.  Internet RFC 8532 says readers
             * should ignore 32-bit data, so this discrepancy matters only to
             * obsolete readers where the traditional type might be more
             * appropriate even if it's "wrong".  So, use the historical zic
             * value, unless -r specifies a low cutoff that excludes some
             * 32-bit timestamps.
             */
            thisdefaulttype = (lo_time <= PG_INT32_MIN
                               ? range64.defaulttype
                               : range32.defaulttype);

            thistimei = range32.base;
            thistimecnt = range32.count;
            toomanytimes = thistimecnt >> 31 >> 1 != 0;
            thisleapi = range32.leapbase;
            thisleapcnt = range32.leapcount;
            locut = PG_INT32_MIN < lo_time;
            hicut = hi_time < PG_INT32_MAX;
        }
        else
        {
            thisdefaulttype = range64.defaulttype;
            thistimei = range64.base;
            thistimecnt = range64.count;
            toomanytimes = thistimecnt >> 31 >> 31 >> 2 != 0;
            thisleapi = range64.leapbase;
            thisleapcnt = range64.leapcount;
            locut = min_time < lo_time;
            hicut = hi_time < max_time;
        }
        if (toomanytimes)
            error(_("too many transition times"));

        /*
         * Keep the last too-low transition if no transition is exactly at LO.
         * The kept transition will be output as a LO "transition"; see
         * "Output a LO_TIME transition" below.  This is needed when the
         * output is truncated at the start, and is also useful when catering
         * to buggy 32-bit clients that do not use time type 0 for timestamps
         * before the first transition.
         */
        if (0 < thistimei && ats[thistimei] != lo_time)
        {
            thistimei--;
            thistimecnt++;
            locut = false;
        }

        thistimelim = thistimei + thistimecnt;
        thisleaplim = thisleapi + thisleapcnt;
        if (thistimecnt != 0)
        {
            if (ats[thistimei] == lo_time)
                locut = false;
            if (hi_time < ZIC_MAX && ats[thistimelim - 1] == hi_time + 1)
                hicut = false;
        }
        memset(omittype, true, typecnt);
        omittype[thisdefaulttype] = false;
        for (i = thistimei; i < thistimelim; i++)
            omittype[types[i]] = false;

        /*
         * Reorder types to make THISDEFAULTTYPE type 0. Use TYPEMAP to swap
         * OLD0 and THISDEFAULTTYPE so that THISDEFAULTTYPE appears as type 0
         * in the output instead of OLD0.  TYPEMAP also omits unused types.
         */
        old0 = strlen(omittype);

#ifndef LEAVE_SOME_PRE_2011_SYSTEMS_IN_THE_LURCH

        /*
         * For some pre-2011 systems: if the last-to-be-written standard (or
         * daylight) type has an offset different from the most recently used
         * offset, append an (unused) copy of the most recently used type (to
         * help get global "altzone" and "timezone" variables set correctly).
         */
        if (want_bloat())
        {
            int         mrudst,
                        mrustd,
                        hidst,
                        histd,
                        type;

            hidst = histd = mrudst = mrustd = -1;
            for (i = thistimei; i < thistimelim; ++i)
                if (isdsts[types[i]])
                    mrudst = types[i];
                else
                    mrustd = types[i];
            for (i = old0; i < typecnt; i++)
            {
                int         h = (i == old0 ? thisdefaulttype
                                 : i == thisdefaulttype ? old0 : i);

                if (!omittype[h])
                {
                    if (isdsts[h])
                        hidst = i;
                    else
                        histd = i;
                }
            }
            if (hidst >= 0 && mrudst >= 0 && hidst != mrudst &&
                utoffs[hidst] !=