zic.c File Reference

#include "postgres_fe.h"
#include <fcntl.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.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

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	linkat(fromdir, from, todir, to, flag)   (itssymlink(from) ? (errno = ENOTSUP, -1) : link(from, to))
#define	PRIdLINENO   "d"
#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	LC_RULE   0
#define	LC_ZONE   1
#define	LC_LINK   2
#define	LC_LEAP   3
#define	ZF_NAME   1
#define	ZF_GMTOFF   2
#define	ZF_RULE   3
#define	ZF_FORMAT   4
#define	ZF_TILYEAR   5
#define	ZF_TILMONTH   6
#define	ZF_TILDAY   7
#define	ZF_TILTIME   8
#define	ZONE_MINFIELDS   5
#define	ZONE_MAXFIELDS   9
#define	ZFC_GMTOFF   0
#define	ZFC_RULE   1
#define	ZFC_FORMAT   2
#define	ZFC_TILYEAR   3
#define	ZFC_TILMONTH   4
#define	ZFC_TILDAY   5
#define	ZFC_TILTIME   6
#define	ZONEC_MINFIELDS   3
#define	ZONEC_MAXFIELDS   7
#define	RF_NAME   1
#define	RF_LOYEAR   2
#define	RF_HIYEAR   3
#define	RF_COMMAND   4
#define	RF_MONTH   5
#define	RF_DAY   6
#define	RF_TOD   7
#define	RF_STDOFF   8
#define	RF_ABBRVAR   9
#define	RULE_FIELDS   10
#define	LF_FROM   1
#define	LF_TO   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	YR_MINIMUM   0
#define	YR_MAXIMUM   1
#define	YR_ONLY   2
#define	TIME_T_BITS_IN_FILE   64
#define	BIG_BANG   (- (((zic_t) 1) << 59))
#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 }
enum	{ WORK_AROUND_GNOME_BUG_730332 = true }
enum	{ YEAR_BY_YEAR_ZONE = 1 }

Functions
int	link (const char *fromname, const char *toname)
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, bool, 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, bool)
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 bool	yearistype (zic_t year, const char *type)
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)
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 *from, char const *to)
static int	rcomp (const void *cp1, const void *cp2)
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	puttzcode64 (const zic_t val, FILE *const fp)
static int	atcomp (const void *avp, const void *bvp)
static bool	is32 (const zic_t x)
static void	writezone (const char *const name, const char *const string, char version)
static char const *	abbroffset (char *buf, zic_t offset)
static size_t	doabbr (char *abbr, struct zone const *zp, char const *letters, zic_t stdoff, bool doquotes)
static void	updateminmax (const zic_t x)
static int	stringoffset (char *result, zic_t offset)
static int	stringrule (char *result, const struct rule *const rp, const zic_t dstoff, const zic_t gmtoff)
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 char *	shellquote (char *b, char const *s)
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 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	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	gmtoffs [TZ_MAX_TYPES]
static char	isdsts [TZ_MAX_TYPES]
static unsigned char	abbrinds [TZ_MAX_TYPES]
static bool	ttisstds [TZ_MAX_TYPES]
static bool	ttisgmts [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 const char *	psxrules
static const char *	lcltime
static const char *	directory
static const char *	leapsec
static const char *	yitcommand
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 const zic_t	early_time

Macro Definition Documentation

#define BIG_BANG   (- (((zic_t) 1) << 59))

Definition at line 991 of file zic.c.

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

Definition at line 86 of file zic.c.

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

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

Definition at line 87 of file zic.c.

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

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

Definition at line 88 of file zic.c.

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

#define DO

(

field

)

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

Referenced by writezone().

#define LC_LEAP   3

Definition at line 193 of file zic.c.

Referenced by infile().

#define LC_LINK   2

Definition at line 192 of file zic.c.

Referenced by infile().

#define LC_RULE   0

Definition at line 190 of file zic.c.

Referenced by infile().

#define LC_ZONE   1

Definition at line 191 of file zic.c.

Referenced by infile().

#define LDAYSPERWEEK   ((zic_t) DAYSPERWEEK)

Referenced by rpytime().

#define LEAP_FIELDS   7

Definition at line 257 of file zic.c.

Referenced by inleap().

#define LF_FROM   1

Definition at line 243 of file zic.c.

Referenced by inlink().

#define LF_TO   2

Definition at line 244 of file zic.c.

Referenced by inlink().

#define LINK_FIELDS   3

Definition at line 245 of file zic.c.

Referenced by inlink().

#define linkat	(		fromdir,
			from,
			todir,
			to,
			flag
	)		(itssymlink(from) ? (errno = ENOTSUP, -1) : link(from, to))

Definition at line 40 of file zic.c.

Referenced by hardlinkerr().

#define LP_CORR   5

Definition at line 255 of file zic.c.

Referenced by inleap().

#define LP_DAY   3

Definition at line 253 of file zic.c.

Referenced by inleap().

#define LP_MONTH   2

Definition at line 252 of file zic.c.

Referenced by inleap().

#define LP_ROLL   6

Definition at line 256 of file zic.c.

Referenced by inleap().

#define LP_TIME   4

Definition at line 254 of file zic.c.

Referenced by inleap().

#define LP_YEAR   1

Definition at line 251 of file zic.c.

Referenced by inleap().

#define MKDIR_UMASK   0755

Definition at line 36 of file zic.c.

Referenced by mkdirs().

#define PRIdLINENO   "d"

Definition at line 51 of file zic.c.

Referenced by inzone(), and verror().

#define RF_ABBRVAR   9

Definition at line 236 of file zic.c.

Referenced by inrule().

#define RF_COMMAND   4

Definition at line 231 of file zic.c.

Referenced by inrule().

#define RF_DAY   6

Definition at line 233 of file zic.c.

Referenced by inrule().

#define RF_HIYEAR   3

Definition at line 230 of file zic.c.

Referenced by inrule().

#define RF_LOYEAR   2

Definition at line 229 of file zic.c.

Referenced by inrule().

#define RF_MONTH   5

Definition at line 232 of file zic.c.

Referenced by inrule().

#define RF_NAME   1

Definition at line 228 of file zic.c.

Referenced by inrule().

#define RF_STDOFF   8

Definition at line 235 of file zic.c.

Referenced by inrule().

#define RF_TOD   7

Definition at line 234 of file zic.c.

Referenced by inrule().

#define RULE_FIELDS   10

Definition at line 237 of file zic.c.

Referenced by inrule().

#define TIME_T_BITS_IN_FILE   64

Definition at line 963 of file zic.c.

#define YR_MAXIMUM   1

Definition at line 264 of file zic.c.

Referenced by rulesub().

#define YR_MINIMUM   0

Definition at line 263 of file zic.c.

Referenced by rulesub().

#define YR_ONLY   2

Definition at line 265 of file zic.c.

Referenced by rulesub().

#define ZF_FORMAT   4

Definition at line 202 of file zic.c.

Referenced by inzsub().

#define ZF_GMTOFF   2

Definition at line 200 of file zic.c.

Referenced by inzsub().

#define ZF_NAME   1

Definition at line 199 of file zic.c.

Referenced by inzone(), and inzsub().

#define ZF_RULE   3

Definition at line 201 of file zic.c.

Referenced by inzsub().

#define ZF_TILDAY   7

Definition at line 205 of file zic.c.

Referenced by inzsub().

#define ZF_TILMONTH   6

Definition at line 204 of file zic.c.

Referenced by inzsub().

#define ZF_TILTIME   8

Definition at line 206 of file zic.c.

Referenced by inzsub().

#define ZF_TILYEAR   5

Definition at line 203 of file zic.c.

Referenced by inzsub().

#define ZFC_FORMAT   2

Definition at line 216 of file zic.c.

Referenced by inzsub().

#define ZFC_GMTOFF   0

Definition at line 214 of file zic.c.

Referenced by inzsub().

#define ZFC_RULE   1

Definition at line 215 of file zic.c.

Referenced by inzsub().

#define ZFC_TILDAY   5

Definition at line 219 of file zic.c.

Referenced by inzsub().

#define ZFC_TILMONTH   4

Definition at line 218 of file zic.c.

Referenced by inzsub().

#define ZFC_TILTIME   6

Definition at line 220 of file zic.c.

Referenced by inzsub().

#define ZFC_TILYEAR   3

Definition at line 217 of file zic.c.

Referenced by inzsub().

#define ZIC_MAX   PG_INT64_MAX

Definition at line 26 of file zic.c.

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

#define ZIC_MAX_ABBR_LEN_WO_WARN   6

Definition at line 29 of file zic.c.

Referenced by newabbr().

#define ZIC_MIN   PG_INT64_MIN

Definition at line 25 of file zic.c.

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

#define ZIC_VERSION   '3'

Definition at line 22 of file zic.c.

Referenced by outzone().

#define ZIC_VERSION_PRE_2013   '2'

Definition at line 21 of file zic.c.

Referenced by outzone().

#define ZONE_MAXFIELDS   9

Definition at line 208 of file zic.c.

Referenced by inzone().

#define ZONE_MINFIELDS   5

Definition at line 207 of file zic.c.

#define ZONEC_MAXFIELDS   7

Definition at line 222 of file zic.c.

Referenced by inzcont().

#define ZONEC_MINFIELDS   3

Definition at line 221 of file zic.c.

Typedef Documentation

typedef int lineno_t

Definition at line 50 of file zic.c.

typedef int64 zic_t

Definition at line 24 of file zic.c.

Enumeration Type Documentation

anonymous enum

Enumerator
PERCENT_Z_LEN_BOUND

Definition at line 150 of file zic.c.

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

anonymous enum

Enumerator
WORK_AROUND_QTBUG_53071

Definition at line 159 of file zic.c.

{
WORK_AROUND_QTBUG_53071 = true};

anonymous enum

Enumerator
WORK_AROUND_GNOME_BUG_730332

Definition at line 1002 of file zic.c.

{
WORK_AROUND_GNOME_BUG_730332 = true};

anonymous enum

Enumerator
YEAR_BY_YEAR_ZONE

Definition at line 2507 of file zic.c.

{
YEAR_BY_YEAR_ZONE = 1};

Function Documentation

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

static

Definition at line 2282 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 UTC 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;
    }
}

static void addtt ( zic_t  starttime, int  type  )

static

Definition at line 3023 of file zic.c.

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

Referenced by outzone().

{
    if (starttime <= early_time
        || (timecnt == 1 && attypes[0].at < early_time))
    {
        gmtoffs[0] = gmtoffs[type];
        isdsts[0] = isdsts[type];
        ttisstds[0] = ttisstds[type];
        ttisgmts[0] = ttisgmts[type];
        if (abbrinds[type] != 0)
            strcpy(chars, &chars[abbrinds[type]]);
        abbrinds[0] = 0;
        charcnt = strlen(chars) + 1;
        typecnt = 1;
        timecnt = 0;
        type = 0;
    }
    attypes = growalloc(attypes, sizeof *attypes, timecnt, &timecnt_alloc);
    attypes[timecnt].at = starttime;
    attypes[timecnt].dontmerge = false;
    attypes[timecnt].type = type;
    ++timecnt;
}

static int addtype ( zic_t  gmtoff, char const *  abbr, bool  isdst, bool  ttisstd, bool  ttisgmt  )

static

Definition at line 3048 of file zic.c.

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

Referenced by outzone(), and writezone().

{
    int         i,
                j;

    /*
     * See if there's already an entry for this zone type. If so, just return
     * its index.
     */
    for (i = 0; i < typecnt; ++i)
    {
        if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
            strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
            ttisstd == ttisstds[i] &&
            ttisgmt == ttisgmts[i])
            return i;
    }

    /*
     * There isn't one; add a new one, unless there are already too many.
     */
    if (typecnt >= TZ_MAX_TYPES)
    {
        error(_("too many local time types"));
        exit(EXIT_FAILURE);
    }
    if (!(-1L - 2147483647L <= gmtoff && gmtoff <= 2147483647L))
    {
        error(_("UT offset out of range"));
        exit(EXIT_FAILURE);
    }
    gmtoffs[i] = gmtoff;
    isdsts[i] = isdst;
    ttisstds[i] = ttisstd;
    ttisgmts[i] = ttisgmt;

    for (j = 0; j < charcnt; ++j)
        if (strcmp(&chars[j], abbr) == 0)
            break;
    if (j == charcnt)
        newabbr(abbr);
    abbrinds[i] = j;
    ++typecnt;
    return i;
}

static void adjleap ( void  )

static

Definition at line 3131 of file zic.c.

References i, leapcnt, and tadd().

Referenced by main().

{
    int         i;
    zic_t       last = 0;

    /*
     * propagate leap seconds forward
     */
    for (i = 0; i < leapcnt; ++i)
    {
        trans[i] = tadd(trans[i], last);
        last = corr[i] += last;
    }
}

static void associate ( void  )

static

Definition at line 1064 of file zic.c.

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

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_stdoff = gethms(zp->z_rule, _("unruly zone"),
                                  true);

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

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

static

Definition at line 1850 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);
}

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

static

Definition at line 3366 of file zic.c.

References ciequal(), itsabbr(), lookup::l_word, and NULL.

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

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

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

    /*
     * Look for exact match.
     */
    for (lp = table; lp->l_word != NULL; ++lp)
        if (ciequal(word, lp->l_word))
            return lp;

    /*
     * Look for inexact match.
     */
    foundlp = NULL;
    for (lp = table; lp->l_word != NULL; ++lp)
        if (itsabbr(word, lp->l_word))
        {
            if (foundlp == NULL)
                foundlp = lp;
            else
                return NULL;    /* multiple inexact matches */
        }
    return foundlp;
}

static void change_directory ( char const *  dir )

static

Definition at line 539 of file zic.c.

References _, EXIT_FAILURE, 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);
        }
    }
}

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

static

Definition at line 3342 of file zic.c.

References lowerit().

Referenced by byword().

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

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

static

Definition at line 506 of file zic.c.

References _, EXIT_FAILURE, NULL, 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);
    }
}

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

static

Definition at line 723 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;
}

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

static

Definition at line 1810 of file zic.c.

References i.

Referenced by ExecEvalConvertRowtype(), ExecInitExprRec(), fmtfloat(), fmtint(), fmtptr(), get_rule_expr(), 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;
}

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

static

Definition at line 1821 of file zic.c.

References i.

Referenced by puttzcode64().

{
    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;
}

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

static

Definition at line 2326 of file zic.c.

References abbroffset(), format, is_alpha(), memmove, NULL, PERCENT_Z_LEN_BOUND, zone::z_format, zone::z_format_specifier, and zone::z_gmtoff.

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_gmtoff + stdoff);
        else if (!letters)
            letters = "%s";
        sprintf(abbr, format, letters);
    }
    else if (stdoff != 0)
    {
        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;
}

static void dolink ( const char *  fromfield, const char *  tofield, bool  staysymlink  )

static

Definition at line 868 of file zic.c.

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

Referenced by main().

{
    bool        todirs_made = false;
    int         link_errno;

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

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

        if (symlink_errno == ENOENT && !todirs_made)
        {
            mkdirs(tofield, true);
            symlink_errno = symlink(contents, tofield) == 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(fromfield, "rb");
            if (!fp)
            {
                char const *e = strerror(errno);

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

                fprintf(stderr, _("%s: Can't create %s/%s: %s\n"),
                        progname, directory, tofield, e);
                exit(EXIT_FAILURE);
            }
            while ((c = getc(fp)) != EOF)
                putc(c, tp);
            close_file(fp, directory, fromfield);
            close_file(tp, directory, tofield);
            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
        }
    }
}

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

static

Definition at line 461 of file zic.c.

References eats(), and NULL.

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

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

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

static

Definition at line 452 of file zic.c.

References name.

Referenced by eat(), and outzone().

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

static char* ecpyalloc ( char const *  str )

static

Definition at line 426 of file zic.c.

References memcheck().

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

{
    return memcheck(strdup(str));
}

static void* emalloc ( size_t  size )

static

Definition at line 414 of file zic.c.

References malloc, and memcheck().

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

{
    return memcheck(malloc(size));
}

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

static

Definition at line 420 of file zic.c.

References memcheck(), and realloc.

Referenced by growalloc().

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

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

static

Definition at line 483 of file zic.c.

References generate_unaccent_rules::args, and verror().

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

{
    va_list     args;

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

static char ** getfields ( char *  buf )

static

Definition at line 3397 of file zic.c.

References _, emalloc(), error(), EXIT_FAILURE, is_space(), NULL, 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;
}

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

static

Definition at line 1253 of file zic.c.

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

Referenced by associate(), inleap(), inrule(), inzsub(), and rulesub().

{
    /* PG: make hh be int not zic_t to avoid sscanf portability issues */
    int         hh;
    int         mm,
                ss,
                sign;
    char        xs;

    if (string == NULL || *string == '\0')
        return 0;
    if (!signable)
        sign = 1;
    else if (*string == '-')
    {
        sign = -1;
        ++string;
    }
    else
        sign = 1;
    if (sscanf(string, "%d%c", &hh, &xs) == 1)
        mm = ss = 0;
    else if (sscanf(string, "%d:%d%c", &hh, &mm, &xs) == 2)
        ss = 0;
    else if (sscanf(string, "%d:%d:%d%c", &hh, &mm, &ss, &xs)
             != 3)
    {
        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
    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));
}

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

static

Definition at line 432 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   amax = PTRDIFF_MAX - WORK_AROUND_QTBUG_53071;

        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));
    }
}

static int hardlinkerr ( char const *  from, char const *  to  )

static

Definition at line 860 of file zic.c.

References linkat.

Referenced by dolink().

{
    int         r = linkat(AT_FDCWD, from, AT_FDCWD, to, AT_SYMLINK_FOLLOW);

    return r == 0 ? 0 : errno;
}

static void infile ( const char *  filename )

static

Definition at line 1150 of file zic.c.

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

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)
        {
            /* nothing to do */
        }
        else if (wantcont)
            wantcont = inzcont(fields, nfields);
        else
        {
            lp = byword(fields[0], line_codes);
            if (lp == NULL)
                error(_("input line of unknown type"));
            else
                switch (lp->l_value)
                {
                    case LC_RULE:
                        inrule(fields, nfields);
                        wantcont = false;
                        break;
                    case LC_ZONE:
                        wantcont = inzone(fields, nfields);
                        break;
                    case LC_LINK:
                        inlink(fields, nfields);
                        wantcont = false;
                        break;
                    case LC_LEAP:
                        if (name != leapsec)
                            warning(_("%s: Leap line in non leap"
                                      " seconds file %s"),
                                    progname, name);
                        else
                            inleap(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"));
}

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

static

Definition at line 1482 of file zic.c.

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

Referenced by infile().

{
    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;

    if (nfields != LEAP_FIELDS)
    {
        error(_("wrong number of fields on Leap line"));
        return;
    }
    dayoff = 0;
    cp = fields[LP_YEAR];
    if (sscanf(cp, "%d%c", &year, &xs) != 1)
    {
        /*
         * Leapin' Lizards!
         */
        error(_("invalid leaping year"));
        return;
    }
    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;
    }
    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;
    }
    dayoff = oadd(dayoff, day - 1);
    if (dayoff < min_time / SECSPERDAY)
    {
        error(_("time too small"));
        return;
    }
    if (dayoff > max_time / SECSPERDAY)
    {
        error(_("time too large"));
        return;
    }
    t = dayoff * SECSPERDAY;
    tod = gethms(fields[LP_TIME], _("invalid time of day"), false);
    cp = fields[LP_CORR];
    {
        bool        positive;
        int         count;

        if (strcmp(cp, "") == 0)
        {                       /* infile() turns "-" into "" */
            positive = false;
            count = 1;
        }
        else if (strcmp(cp, "--") == 0)
        {
            positive = false;
            count = 2;
        }
        else if (strcmp(cp, "+") == 0)
        {
            positive = true;
            count = 1;
        }
        else if (strcmp(cp, "++") == 0)
        {
            positive = true;
            count = 2;
        }
        else
        {
            error(_("illegal CORRECTION field on Leap line"));
            return;
        }
        if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL)
        {
            error(_("illegal Rolling/Stationary field on Leap line"));
            return;
        }
        t = tadd(t, tod);
        if (t < early_time)
        {
            error(_("leap second precedes Big Bang"));
            return;
        }
        leapadd(t, positive, lp->l_value, count);
    }
}

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

static

Definition at line 1612 of file zic.c.

References _, ecpyalloc(), error(), filename, growalloc(), link::l_filename, link::l_from, link::l_linenum, link::l_to, LF_FROM, LF_TO, 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_FROM] == '\0')
    {
        error(_("blank FROM field on Link line"));
        return;
    }
    if (!namecheck(fields[LF_TO]))
        return;
    l.l_filename = filename;
    l.l_linenum = linenum;
    l.l_from = ecpyalloc(fields[LF_FROM]);
    l.l_to = ecpyalloc(fields[LF_TO]);
    links = growalloc(links, sizeof *links, nlinks, &nlinks_alloc);
    links[nlinks++] = l;
}

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

static

Definition at line 1306 of file zic.c.

References _, ecpyalloc(), error(), filename, gethms(), growalloc(), linenum, rule::r_abbrvar, rule::r_filename, rule::r_linenum, rule::r_name, rule::r_stdoff, RF_ABBRVAR, RF_COMMAND, RF_DAY, RF_HIYEAR, RF_LOYEAR, RF_MONTH, RF_NAME, RF_STDOFF, 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;
    }
    if (*fields[RF_NAME] == '\0')
    {
        error(_("nameless rule"));
        return;
    }
    r.r_filename = filename;
    r.r_linenum = linenum;
    r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), true);
    rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
            fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
    r.r_name = ecpyalloc(fields[RF_NAME]);
    r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
    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;
}

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

static

Definition at line 1372 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);
}

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

static

Definition at line 1334 of file zic.c.

References _, error(), i, inzsub(), NULL, nzones, PRIdLINENO, TZDEFAULT, 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 (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL)
    {
        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 %" PRIdLINENO ")"),
                  fields[ZF_NAME],
                  zones[i].z_filename,
                  zones[i].z_linenum);
            return false;
        }
    return inzsub(fields, nfields, false);
}

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

static

Definition at line 1383 of file zic.c.

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

Referenced by inzcont(), and inzone().

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

    if (iscont)
    {
        i_gmtoff = ZFC_GMTOFF;
        i_rule = ZFC_RULE;
        i_format = ZFC_FORMAT;
        i_untilyear = ZFC_TILYEAR;
        i_untilmonth = ZFC_TILMONTH;
        i_untilday = ZFC_TILDAY;
        i_untiltime = ZFC_TILTIME;
        z.z_name = NULL;
    }
    else if (!namecheck(fields[ZF_NAME]))
        return false;
    else
    {
        i_gmtoff = ZF_GMTOFF;
        i_rule = ZF_RULE;
        i_format = ZF_FORMAT;
        i_untilyear = ZF_TILYEAR;
        i_untilmonth = ZF_TILMONTH;
        i_untilday = ZF_TILDAY;
        i_untiltime = ZF_TILTIME;
        z.z_name = ecpyalloc(fields[ZF_NAME]);
    }
    z.z_filename = filename;
    z.z_linenum = linenum;
    z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UT offset"), true);
    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;
}

static bool is32 ( const zic_t  x )

static

Definition at line 1859 of file zic.c.

Referenced by writezone().

{
    return x == ((zic_t) ((int32) x));
}

static bool is_alpha ( char  a )

static

Definition at line 3214 of file zic.c.

Referenced by doabbr(), mkdirs(), 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;
    }
}

static bool is_space ( char  a )

static

Definition at line 3196 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;
    }
}

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

static

Definition at line 3351 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;
}

static bool itsdir ( char const *  name )

static

Definition at line 1012 of file zic.c.

References emalloc(), EOVERFLOW, and free.

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;
}

static bool itssymlink ( char const *  name )

static

Definition at line 1037 of file zic.c.

Referenced by dolink().

{
#ifdef HAVE_SYMLINK
    char        c;

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

static void leapadd ( zic_t  t, bool  positive, int  rolling, int  count  )

static

Definition at line 3095 of file zic.c.

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

Referenced by inleap().

{
    int         i,
                j;

    if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS)
    {
        error(_("too many leap seconds"));
        exit(EXIT_FAILURE);
    }
    for (i = 0; i < leapcnt; ++i)
        if (t <= trans[i])
        {
            if (t == trans[i])
            {
                error(_("repeated leap second moment"));
                exit(EXIT_FAILURE);
            }
            break;
        }
    do
    {
        for (j = leapcnt; j > i; --j)
        {
            trans[j] = trans[j - 1];
            corr[j] = corr[j - 1];
            roll[j] = roll[j - 1];
        }
        trans[i] = t;
        corr[i] = positive ? 1 : -count;
        roll[i] = rolling;
        ++leapcnt;
    } while (positive && --count != 0);
}

int link	(	const char *	fromname,
		const char *	toname
	)

Referenced by durable_link_or_rename(), and remove_from_unowned_list().

static char lowerit ( char  a )

static

Definition at line 3279 of file zic.c.

Referenced by ciequal(), 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';
    }
}

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 566 of file zic.c.

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

{
    int         c,
                k;
    ptrdiff_t   i,
                j;

#ifndef WIN32
    umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
#endif                          /* !WIN32 */
    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, "d:l:p:L:vPsy:")) != EOF && c != -1)
        switch (c)
        {
            default:
                usage(stderr, EXIT_FAILURE);
            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 'y':
                if (yitcommand == NULL)
                    yitcommand = strdup(optarg);
                else
                {
                    fprintf(stderr,
                            _("%s: More than one -y option specified\n"),
                            progname);
                    return EXIT_FAILURE;
                }
                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 's':
                warning(_("-s ignored"));
                break;
        }
    if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
        usage(stderr, EXIT_FAILURE);    /* usage message by request */
    if (directory == NULL)
        directory = "data";
    if (yitcommand == NULL)
        yitcommand = "yearistype";

    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_from, links[i].l_to, false);
        if (noise)
            for (j = 0; j < nlinks; ++j)
                if (strcmp(links[i].l_to,
                           links[j].l_from) == 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;
}

static void* memcheck ( void *  ptr )

static

Definition at line 406 of file zic.c.

References memory_exhausted(), NULL, and strerror().

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

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

static void memory_exhausted ( const char *  msg )

static

Definition at line 391 of file zic.c.

References _, and EXIT_FAILURE.

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

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

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

static

Definition at line 3617 of file zic.c.

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

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

{
    char       *name;
    char       *cp;

    cp = name = ecpyalloc(argname);

    /* Do not mkdir a root directory, as it must exist.  */
#ifdef WIN32
    if (is_alpha(name[0]) && name[1] == ':')
        cp += 2;
#endif
    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);
}

static bool namecheck ( const char *  name )

static

Definition at line 767 of file zic.c.

References _, componentcheck(), name, 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);
}

static void newabbr ( const char *  abbr )

static

Definition at line 3579 of file zic.c.

References _, error(), EXIT_FAILURE, GRANDPARENTED, i, is_alpha(), NULL, 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;
}

static zic_t oadd ( zic_t  t1, zic_t  t2  )

static

Definition at line 3444 of file zic.c.

References time_overflow(), ZIC_MAX, and ZIC_MIN.

Referenced by gethms(), inleap(), outzone(), and rpytime().

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

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

static

Definition at line 2647 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, NULL, oadd(), rule::r_abbrvar, rule::r_dayofmonth, rule::r_dycode, rule::r_filename, rule::r_hiwasnum, rule::r_hiyear, rule::r_linenum, rule::r_lowasnum, rule::r_loyear, rule::r_month, rule::r_stdoff, rule::r_temp, rule::r_tod, rule::r_todisgmt, rule::r_todisstd, rule::r_todo, rule::r_yrtype, rpytime(), stringzone(), tadd(), timecnt, TM_JANUARY, updateminmax(), warning(), writezone(), YEAR_BY_YEAR_ZONE, yearistype(), YEARSPERREPEAT, zone::z_filename, zone::z_format, zone::z_gmtoff, zone::z_linenum, zone::z_name, zone::z_nrules, zone::z_rules, 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       gmtoff;
    zic_t       stdoff;
    zic_t       year;
    zic_t       startoff;
    bool        startttisstd;
    bool        startttisgmt;
    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;

    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;
    startttisgmt = 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 || compat == YEAR_BY_YEAR_ZONE;
    if (noise)
    {
        if (!*envvar)
            warning("%s %s",
                    _("no POSIX environment variable for zone"),
                    zpfirst->z_name);
        else if (compat != 0 && compat != YEAR_BY_YEAR_ZONE)
        {
            /*
             * 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;
        }
    }

    /*
     * For the benefit of older systems, generate data from 1900 through 2038.
     */
    if (min_year > 1900)
        min_year = 1900;
    max_year0 = max_year;
    if (max_year < 2038)
        max_year = 2038;
    for (i = 0; i < zonecount; ++i)
    {
        /*
         * A guess that may well be corrected later.
         */
        stdoff = 0;
        zp = &zpfirst[i];
        usestart = i > 0 && (zp - 1)->z_untiltime > early_time;
        useuntil = i < (zonecount - 1);
        if (useuntil && zp->z_untiltime <= early_time)
            continue;
        gmtoff = zp->z_gmtoff;
        eat(zp->z_filename, zp->z_linenum);
        *startbuf = '\0';
        startoff = zp->z_gmtoff;
        if (zp->z_nrules == 0)
        {
            stdoff = zp->z_stdoff;
            doabbr(startbuf, zp, NULL, stdoff, false);
            type = addtype(oadd(zp->z_gmtoff, stdoff),
                           startbuf, stdoff != 0, startttisstd,
                           startttisgmt);
            if (usestart)
            {
                addtt(starttime, type);
                usestart = false;
            }
            else
                addtt(early_time, type);
        }
        else
            for (year = min_year; year <= max_year; ++year)
            {
                if (useuntil && year > zp->z_untilrule.r_hiyear)
                    break;

                /*
                 * Mark which rules to do in the current year. For those to
                 * do, calculate rpytime(rp, year);
                 */
                for (j = 0; j < zp->z_nrules; ++j)
                {
                    rp = &zp->z_rules[j];
                    eats(zp->z_filename, zp->z_linenum,
                         rp->r_filename, rp->r_linenum);
                    rp->r_todo = year >= rp->r_loyear &&
                        year <= rp->r_hiyear &&
                        yearistype(year, rp->r_yrtype);
                    if (rp->r_todo)
                    {
                        rp->r_temp = rpytime(rp, year);
                        rp->r_todo
                            = (rp->r_temp < y2038_boundary
                               || year <= max_year0);
                    }
                }
                for (;;)
                {
                    ptrdiff_t   k;
                    zic_t       jtime,
                                ktime = 0;
                    zic_t       offset;

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

                    /*
                     * Find the rule (of those to do, if any) that takes
                     * effect earliest in the year.
                     */
                    k = -1;
                    for (j = 0; j < zp->z_nrules; ++j)
                    {
                        rp = &zp->z_rules[j];
                        if (!rp->r_todo)
                            continue;
                        eats(zp->z_filename, zp->z_linenum,
                             rp->r_filename, rp->r_linenum);
                        offset = rp->r_todisgmt ? 0 : gmtoff;
                        if (!rp->r_todisstd)
                            offset = oadd(offset, stdoff);
                        jtime = rp->r_temp;
                        if (jtime == min_time ||
                            jtime == max_time)
                            continue;
                        jtime = tadd(jtime, -offset);
                        if (k < 0 || jtime < ktime)
                        {
                            k = j;
                            ktime = jtime;
                        }
                        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;
                    stdoff = rp->r_stdoff;
                    if (usestart && ktime == starttime)
                        usestart = false;
                    if (usestart)
                    {
                        if (ktime < starttime)
                        {
                            startoff = oadd(zp->z_gmtoff,
                                            stdoff);
                            doabbr(startbuf, zp,
                                   rp->r_abbrvar,
                                   rp->r_stdoff,
                                   false);
                            continue;
                        }
                        if (*startbuf == '\0' &&
                            startoff == oadd(zp->z_gmtoff, stdoff))
                        {
                            doabbr(startbuf,
                                   zp,
                                   rp->r_abbrvar,
                                   rp->r_stdoff,
                                   false);
                        }
                    }
                    eats(zp->z_filename, zp->z_linenum,
                         rp->r_filename, rp->r_linenum);
                    doabbr(ab, zp, rp->r_abbrvar,
                           rp->r_stdoff, false);
                    offset = oadd(zp->z_gmtoff, rp->r_stdoff);
                    type = addtype(offset, ab, rp->r_stdoff != 0,
                                   rp->r_todisstd, rp->r_todisgmt);
                    if (rp->r_hiyear == ZIC_MAX
                        && !(0 <= lastatmax
                             && ktime < attypes[lastatmax].at))
                        lastatmax = timecnt;
                    addtt(ktime, type);
                }
            }
        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
                addtt(starttime,
                      addtype(startoff, startbuf,
                              startoff != zp->z_gmtoff,
                              startttisstd,
                              startttisgmt));
        }

        /*
         * Now we may get to set starttime for the next zone line.
         */
        if (useuntil)
        {
            startttisstd = zp->z_untilrule.r_todisstd;
            startttisgmt = zp->z_untilrule.r_todisgmt;
            starttime = zp->z_untiltime;
            if (!startttisstd)
                starttime = tadd(starttime, -stdoff);
            if (!startttisgmt)
                starttime = tadd(starttime, -gmtoff);
        }
    }
    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[0], i = 1; i < timecnt; i++)
            if (attypes[i].at > lastat->at)
                lastat = &attypes[i];
        if (lastat->at < rpytime(&xr, max_year - 1))
        {
            addtt(rpytime(&xr, max_year + 1), typecnt - 1);
            attypes[timecnt - 1].dontmerge = true;
        }
    }
    writezone(zpfirst->z_name, envvar, version);
    free(startbuf);
    free(ab);
    free(envvar);
}

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

static

Definition at line 1832 of file zic.c.

References buf, and convert().

Referenced by writezone().

{
    char        buf[4];

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

static void puttzcode64 ( const zic_t  val, FILE *const  fp  )

static

Definition at line 1841 of file zic.c.

References buf, and convert64().

Referenced by writezone().

{
    char        buf[8];

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

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

static

Definition at line 1057 of file zic.c.

Referenced by associate().

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

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

static

Definition at line 3481 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, tadd(), TM_FEBRUARY, TM_JANUARY, warning(), 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;
    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);
}

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

static

Definition at line 2494 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;
}

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 1637 of file zic.c.

References _, byword(), DC_DOM, DC_DOWGEQ, DC_DOWLEQ, ecpyalloc(), error(), EXIT_FAILURE, free, gethms(), lookup::l_value, lowerit(), NULL, 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_todisgmt, rule::r_todisstd, rule::r_wday, rule::r_yrtype, 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_todisgmt = false;
    dp = ecpyalloc(timep);
    if (*dp != '\0')
    {
        ep = dp + strlen(dp) - 1;
        switch (lowerit(*ep))
        {
            case 's':           /* Standard */
                rp->r_todisstd = true;
                rp->r_todisgmt = false;
                *ep = '\0';
                break;
            case 'w':           /* Wall */
                rp->r_todisstd = false;
                rp->r_todisgmt = false;
                *ep = '\0';
                break;
            case 'g':           /* Greenwich */
            case 'u':           /* Universal */
            case 'z':           /* Zulu */
                rp->r_todisstd = true;
                rp->r_todisgmt = true;
                *ep = '\0';
                break;
        }
    }
    rp->r_tod = gethms(dp, _("invalid time of day"), false);
    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')
        rp->r_yrtype = NULL;
    else
    {
        if (rp->r_loyear == rp->r_hiyear)
        {
            error(_("typed single year"));
            return;
        }
        rp->r_yrtype = ecpyalloc(typep);
    }

    /*
     * Day work. Accept things such as:  1  last-Sunday  Sun<=20  Sun>=7
     */
    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);
}

static char* shellquote ( char *  b, char const *  s  )

static

Definition at line 3147 of file zic.c.

Referenced by yearistype().

{
    *b++ = '\'';
    while (*s)
    {
        if (*s == '\'')
            *b++ = '\'', *b++ = '\\', *b++ = '\'';
        *b++ = *s++;
    }
    *b++ = '\'';
    return b;
}

static size_t size_product ( size_t  nitems, size_t  itemsize  )

static

Definition at line 398 of file zic.c.

References _, memory_exhausted(), and SIZE_MAX.

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

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

static int stringoffset ( char *  result, zic_t  offset  )

static

Definition at line 2378 of file zic.c.

References DAYSPERWEEK, HOURSPERDAY, MINSPERHOUR, and SECSPERMIN.

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;
}

static int stringrule ( char *  result, const struct rule *const  rp, const zic_t  dstoff, const zic_t  gmtoff  )

static

Definition at line 2412 of file zic.c.

References compat, DAYSPERWEEK, DC_DOM, DC_DOWGEQ, DC_DOWLEQ, MINSPERHOUR, rule::r_dayofmonth, rule::r_dycode, rule::r_month, rule::r_stdoff, rule::r_tod, rule::r_todisgmt, rule::r_todisstd, rule::r_wday, SECSPERDAY, SECSPERMIN, 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_todisgmt)
        tod += gmtoff;
    if (rp->r_todisstd && rp->r_stdoff == 0)
        tod += dstoff;
    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;
}

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

static

Definition at line 2512 of file zic.c.

References compat, DC_DOM, doabbr(), i, MINSPERHOUR, NULL, rule::r_abbrvar, rule::r_dayofmonth, rule::r_dycode, rule::r_hiwasnum, rule::r_hiyear, rule::r_month, rule::r_stdoff, rule::r_tod, rule::r_todisgmt, rule::r_todisstd, rule::r_yrtype, rule_cmp(), SECSPERDAY, SECSPERMIN, stringoffset(), stringrule(), TM_DECEMBER, TM_JANUARY, YEAR_BY_YEAR_ZONE, zone::z_gmtoff, 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';
    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_yrtype != NULL)
            continue;
        if (rp->r_stdoff == 0)
        {
            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_stdoff == 0 && rule_cmp(stdabbrrp, rp) < 0)
                stdabbrrp = rp;
            if (rule_cmp(stdrp, rp) < 0)
                stdrp = rp;
        }

        /*
         * Horrid special case: if year is 2037, presume this is a zone
         * handled on a year-by-year basis; do not try to apply a rule to the
         * zone.
         */
        if (stdrp != NULL && stdrp->r_hiyear == 2037)
            return YEAR_BY_YEAR_ZONE;

        if (stdrp != NULL && stdrp->r_stdoff != 0)
        {
            /* 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_todisgmt = false;
            dstr.r_stdoff = stdrp->r_stdoff;
            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_stdoff;
            stdr.r_todisstd = stdr.r_todisgmt = false;
            stdr.r_stdoff = 0;
            stdr.r_abbrvar
                = (stdabbrrp ? stdabbrrp->r_abbrvar : "");
            dstrp = &dstr;
            stdrp = &stdr;
        }
    }
    if (stdrp == NULL && (zp->z_nrules != 0 || zp->z_stdoff != 0))
        return -1;
    abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar;
    len = doabbr(result, zp, abbrvar, 0, true);
    offsetlen = stringoffset(result + len, -zp->z_gmtoff);
    if (!offsetlen)
    {
        result[0] = '\0';
        return -1;
    }
    len += offsetlen;
    if (dstrp == NULL)
        return compat;
    len += doabbr(result + len, zp, dstrp->r_abbrvar, dstrp->r_stdoff, true);
    if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR)
    {
        offsetlen = stringoffset(result + len,
                                 -(zp->z_gmtoff + dstrp->r_stdoff));
        if (!offsetlen)
        {
            result[0] = '\0';
            return -1;
        }
        len += offsetlen;
    }
    result[len++] = ',';
    c = stringrule(result + len, dstrp, dstrp->r_stdoff, zp->z_gmtoff);
    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_stdoff, zp->z_gmtoff);
    if (c < 0)
    {
        result[0] = '\0';
        return -1;
    }
    if (compat < c)
        compat = c;
    return compat;
}

static zic_t tadd ( zic_t  t1, zic_t  t2  )

static

Definition at line 3452 of file zic.c.

References max_time, min_time, and time_overflow().

Referenced by adjleap(), inleap(), 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;
}

static void time_overflow ( void  )

static

Definition at line 3437 of file zic.c.

References _, error(), and EXIT_FAILURE.

Referenced by oadd(), and tadd().

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

static void updateminmax ( const zic_t  x )

static

Definition at line 2369 of file zic.c.

Referenced by outzone().

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

static void usage ( FILE *  stream, int  status  )

static

Definition at line 522 of file zic.c.

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

Referenced by main().

{
    fprintf(stream,
            _("%s: usage is %s [ --version ] [ --help ] [ -v ] [ -P ] \\\n"
              "\t[ -l localtime ] [ -p posixrules ] [ -d directory ] \\\n"
              "\t[ -L leapseconds ] [ filename ... ]\n\n"
              "Report bugs to %s.\n"),
            progname, progname, PACKAGE_BUGREPORT);
    if (status == EXIT_SUCCESS)
        close_file(stream, NULL, NULL);
    exit(status);
}

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

static

Definition at line 467 of file zic.c.

References _, NULL, and PRIdLINENO.

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 %" PRIdLINENO ": "), filename, linenum);
    vfprintf(stderr, string, args);
    if (rfilename != NULL)
        fprintf(stderr, _(" (rule from \"%s\", line %" PRIdLINENO ")"),
                rfilename, rlinenum);
    fprintf(stderr, "\n");
}

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

static

Definition at line 494 of file zic.c.

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

Referenced by associate(), componentcheck(), dolink(), gethms(), infile(), 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;
}

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

static

Definition at line 1865 of file zic.c.

References _, addtype(), attype::at, atcomp(), attypes, close_file(), convert(), DO, emalloc(), error(), EXIT_FAILURE, free, GRANDPARENTED, i, INT64_FORMAT, is32(), leapcnt, mkdirs(), PG_INT32_MIN, puttzcode(), puttzcode64(), qsort, size_product(), strerror(), tadd(), timecnt, tm, 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_reserved, tzhead::tzh_timecnt, tzhead::tzh_ttisgmtcnt, tzhead::tzh_ttisstdcnt, tzhead::tzh_typecnt, tzhead::tzh_version, warning(), and WORK_AROUND_QTBUG_53071.

Referenced by outzone().

{
    FILE       *fp;
    ptrdiff_t   i,
                j;
    int         leapcnt32,
                leapi32;
    ptrdiff_t   timecnt32,
                timei32;
    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;
    zic_t      *ats = emalloc(size_product(nats, sizeof *ats + 1));
    void       *typesptr = ats + nats;
    unsigned char *types = typesptr;

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

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

        toi = 0;
        fromi = 0;
        while (fromi < timecnt && attypes[fromi].at < early_time)
            ++fromi;
        for (; fromi < timecnt; ++fromi)
        {
            if (toi > 1 && ((attypes[fromi].at +
                             gmtoffs[attypes[toi - 1].type]) <=
                            (attypes[toi - 1].at +
                             gmtoffs[attypes[toi - 2].type])))
            {
                attypes[toi - 1].type =
                    attypes[fromi].type;
                continue;
            }
            if (toi == 0
                || attypes[fromi].dontmerge
                || attypes[toi - 1].type != 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;
    }

    /*
     * Work around QTBUG-53071 for time stamps 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.
     */
    if (WORK_AROUND_QTBUG_53071 && timecnt != 0
        && ats[timecnt - 1] < y2038_boundary - 1 && strchr(string, '<'))
    {
        ats[timecnt] = y2038_boundary - 1;
        types[timecnt] = types[timecnt - 1];
        timecnt++;
    }

    /*
     * 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;
            }
    }

    /*
     * Figure out 32-bit-limited starts and counts.
     */
    timecnt32 = timecnt;
    timei32 = 0;
    leapcnt32 = leapcnt;
    leapi32 = 0;
    while (timecnt32 > 0 && !is32(ats[timecnt32 - 1]))
        --timecnt32;
    while (timecnt32 > 0 && !is32(ats[timei32]))
    {
        --timecnt32;
        ++timei32;
    }

    /*
     * Output an INT32_MIN "transition" if appropriate; see below.
     */
    if (timei32 > 0 && ats[timei32] > PG_INT32_MIN)
    {
        --timei32;
        ++timecnt32;
    }
    while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1]))
        --leapcnt32;
    while (leapcnt32 > 0 && !is32(trans[leapi32]))
    {
        --leapcnt32;
        ++leapi32;
    }

    /*
     * 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         writetype[TZ_MAX_TYPES];
        int         typemap[TZ_MAX_TYPES];
        int         thistypecnt;
        char        thischars[TZ_MAX_CHARS];
        int         thischarcnt;
        bool        toomanytimes;
        int         indmap[TZ_MAX_CHARS];

        if (pass == 1)
        {
            thistimei = timei32;
            thistimecnt = timecnt32;
            toomanytimes = thistimecnt >> 31 >> 1 != 0;
            thisleapi = leapi32;
            thisleapcnt = leapcnt32;
        }
        else
        {
            thistimei = 0;
            thistimecnt = timecnt;
            toomanytimes = thistimecnt >> 31 >> 31 >> 2 != 0;
            thisleapi = 0;
            thisleapcnt = leapcnt;
        }
        if (toomanytimes)
            error(_("too many transition times"));
        thistimelim = thistimei + thistimecnt;
        thisleaplim = thisleapi + thisleapcnt;
        for (i = 0; i < typecnt; ++i)
            writetype[i] = thistimecnt == timecnt;
        if (thistimecnt == 0)
        {
            /*
             * No transition times fall in the current (32- or 64-bit) window.
             */
            if (typecnt != 0)
                writetype[typecnt - 1] = true;
        }
        else
        {
            for (i = thistimei - 1; i < thistimelim; ++i)
                if (i >= 0)
                    writetype[types[i]] = true;

            /*
             * For America/Godthab and Antarctica/Palmer
             */
            if (thistimei == 0)
                writetype[0] = true;
        }
#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).
         */
        {
            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 = 0; i < typecnt; ++i)
                if (writetype[i])
                {
                    if (isdsts[i])
                        hidst = i;
                    else
                        histd = i;
                }
            if (hidst >= 0 && mrudst >= 0 && hidst != mrudst &&
                gmtoffs[hidst] != gmtoffs[mrudst])
            {
                isdsts[mrudst] = -1;
                type = addtype(gmtoffs[mrudst],
                               &chars[abbrinds[mrudst]],
                               true,
                               ttisstds[mrudst],
                               ttisgmts[mrudst]);
                isdsts[mrudst] = 1;
                writetype[type] = true;
            }
            if (histd >= 0 && mrustd >= 0 && histd != mrustd &&
                gmtoffs[histd] != gmtoffs[mrustd])
            {
                isdsts[mrustd] = -1;
                type = addtype(gmtoffs[mrustd],
                               &chars[abbrinds[mrustd]],
                               false,
                               ttisstds[mrustd],
                               ttisgmts[mrustd]);
                isdsts[mrustd] = 0;
                writetype[type] = true;
            }
        }
#endif                          /* !defined
                                 * LEAVE_SOME_PRE_2011_SYSTEMS_IN_THE_LURCH */
        thistypecnt = 0;
        for (i = 0; i < typecnt; ++i)
            typemap[i] = writetype[i] ? thistypecnt++ : -1;
        for (i = 0; i < sizeof indmap / sizeof indmap[0]; ++i)
            indmap[i] = -1;
        thischarcnt = 0;
        for (i = 0; i < typecnt; ++i)
        {
            char       *thisabbr;

            if (!writetype[i])
                continue;
            if (indmap[abbrinds[i]] >= 0)
                continue;
            thisabbr = &chars[abbrinds[i]];
            for (j = 0; j < thischarcnt; ++j)
                if (strcmp(&thischars[j], thisabbr) == 0)
                    break;
            if (j == thischarcnt)
            {
                strcpy(&thischars[thischarcnt], thisabbr);
                thischarcnt += strlen(thisabbr) + 1;
            }
            indmap[abbrinds[i]] = j;
        }
#define DO(field)   fwrite(tzh.field, sizeof tzh.field, 1, fp)
        tzh = tzh0;
        strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
        tzh.tzh_version[0] = version;
        convert(thistypecnt, tzh.tzh_ttisgmtcnt);
        convert(thistypecnt, tzh.tzh_ttisstdcnt);
        convert(thisleapcnt, tzh.tzh_leapcnt);
        convert(thistimecnt, tzh.tzh_timecnt);
        convert(thistypecnt, tzh.tzh_typecnt);
        convert(thischarcnt, tzh.tzh_charcnt);
        DO(tzh_magic);
        DO(tzh_version);
        DO(tzh_reserved);
        DO(tzh_ttisgmtcnt);
        DO(tzh_ttisstdcnt);
        DO(tzh_leapcnt);
        DO(tzh_timecnt);
        DO(tzh_typecnt);
        DO(tzh_charcnt);
#undef DO
        for (i = thistimei; i < thistimelim; ++i)
            if (pass == 1)

                /*
                 * Output an INT32_MIN "transition" if appropriate; see above.
                 */
                puttzcode(((ats[i] < PG_INT32_MIN) ?
                           PG_INT32_MIN : ats[i]), fp);
            else
            {
                puttzcode64(ats[i], fp);

                /* Print current timezone abbreviations if requested */
                if (print_abbrevs &&
                    (i == thistimelim - 1 || ats[i + 1] > print_cutoff))
                {
                    unsigned char tm = typemap[types[i]];
                    char       *thisabbrev = &thischars[indmap[abbrinds[tm]]];

                    /* filter out assorted junk entries */
                    if (strcmp(thisabbrev, GRANDPARENTED) != 0 &&
                        strcmp(thisabbrev, "zzz") != 0)
                        fprintf(stdout, "%s\t" INT64_FORMAT "%s\n",
                                thisabbrev,
                                gmtoffs[tm],
                                isdsts[tm] ? "\tD" : "");
                }
            }
        for (i = thistimei; i < thistimelim; ++i)
        {
            unsigned char uc;

            uc = typemap[types[i]];
            fwrite(&uc, sizeof uc, 1, fp);
        }
        for (i = 0; i < typecnt; ++i)
            if (writetype[i])
            {
                puttzcode(gmtoffs[i], fp);
                putc(isdsts[i], fp);
                putc((unsigned char) indmap[abbrinds[i]], fp);
            }
        if (thischarcnt != 0)
            fwrite(thischars, sizeof thischars[0],
                   thischarcnt, fp);
        for (i = thisleapi; i < thisleaplim; ++i)
        {
            zic_t       todo;

            if (roll[i])
            {
                if (timecnt == 0 || trans[i] < ats[0])
                {
                    j = 0;
                    while (isdsts[j])
                        if (++j >= typecnt)
                        {
                            j = 0;
                            break;
                        }
                }
                else
                {
                    j = 1;
                    while (j < timecnt &&
                           trans[i] >= ats[j])
                        ++j;
                    j = types[j - 1];
                }
                todo = tadd(trans[i], -gmtoffs[j]);
            }
            else
                todo = trans[i];
            if (pass == 1)
                puttzcode(todo, fp);
            else
                puttzcode64(todo, fp);
            puttzcode(corr[i], fp);
        }
        for (i = 0; i < typecnt; ++i)
            if (writetype[i])
                putc(ttisstds[i], fp);
        for (i = 0; i < typecnt; ++i)
            if (writetype[i])
                putc(ttisgmts[i], fp);
    }
    fprintf(fp, "\n%s\n", string);
    close_file(fp, directory, name);
    free(ats);
}

static bool yearistype ( zic_t  year, const char *  type  )

static

Definition at line 3161 of file zic.c.

References _, buf, emalloc(), error(), EXIT_FAILURE, free, INT64_FORMAT, INT_STRLEN_MAXIMUM, NULL, result, shellquote(), status(), WEXITSTATUS, and WIFEXITED.

Referenced by outzone().

{
    char       *buf;
    char       *b;
    int         result;

    if (type == NULL || *type == '\0')
        return true;
    buf = emalloc(1 + 4 * strlen(yitcommand) + 2
                  + INT_STRLEN_MAXIMUM(zic_t) +2 + 4 * strlen(type) + 2);
    b = shellquote(buf, yitcommand);
    *b++ = ' ';
    b += sprintf(b, INT64_FORMAT, year);
    *b++ = ' ';
    b = shellquote(b, type);
    *b = '\0';
    result = system(buf);
    if (WIFEXITED(result))
    {
        int         status = WEXITSTATUS(result);

        if (status <= 1)
        {
            free(buf);
            return status == 0;
        }
    }
    error(_("Wild result from command execution"));
    fprintf(stderr, _("%s: command was '%s', result was %d\n"),
            progname, buf, result);
    exit(EXIT_FAILURE);
}

Variable Documentation

unsigned char abbrinds[TZ_MAX_TYPES]

static

Definition at line 378 of file zic.c.

struct attype * attypes

static

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

struct lookup const begin_years[]

static

Initial value:

= {
    {"minimum", YR_MINIMUM},
    {"maximum", YR_MAXIMUM},
    {NULL, 0}
}

Definition at line 342 of file zic.c.

int charcnt

static

Definition at line 163 of file zic.c.

Referenced by addtype(), pg_interpret_timezone_abbrev(), tzloadbody(), and tzparse().

char chars[TZ_MAX_CHARS]

static

Definition at line 381 of file zic.c.

Referenced by getColorInfo().

zic_t corr[TZ_MAX_LEAPS]

static

Definition at line 383 of file zic.c.

Referenced by timesub(), and tzloadbody().

const char* directory

static

Definition at line 561 of file zic.c.

Referenced by main().

const zic_t early_time

static

Initial value:

= (WORK_AROUND_GNOME_BUG_730332
                                 ? BIG_BANG
                                 : MINVAL(zic_t, TIME_T_BITS_IN_FILE))

Definition at line 1006 of file zic.c.

struct lookup const end_years[]

static

Initial value:

= {
    {"minimum", YR_MINIMUM},
    {"maximum", YR_MAXIMUM},
    {"only", YR_ONLY},
    {NULL, 0}
}

Definition at line 348 of file zic.c.

bool errors

static

Definition at line 164 of file zic.c.

const char* filename

static

Definition at line 166 of file zic.c.

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

zic_t gmtoffs[TZ_MAX_TYPES]

static

Definition at line 376 of file zic.c.

char isdsts[TZ_MAX_TYPES]

static

Definition at line 377 of file zic.c.

struct lookup const lasts[]

static

Initial value:

= {
    {"last-Sunday", TM_SUNDAY},
    {"last-Monday", TM_MONDAY},
    {"last-Tuesday", TM_TUESDAY},
    {"last-Wednesday", TM_WEDNESDAY},
    {"last-Thursday", TM_THURSDAY},
    {"last-Friday", TM_FRIDAY},
    {"last-Saturday", TM_SATURDAY},
    {NULL, 0}
}

Definition at line 331 of file zic.c.

const char* lcltime

static

Definition at line 560 of file zic.c.

struct lookup const leap_types[]

static

Initial value:

= {
    {"Rolling", true},
    {"Stationary", false},
    {NULL, 0}
}

Definition at line 355 of file zic.c.

int leapcnt

static

Definition at line 167 of file zic.c.

Referenced by adjleap(), leapadd(), tzloadbody(), and writezone().

zic_t leapmaxyear

static

Definition at line 170 of file zic.c.

zic_t leapminyear

static

Definition at line 169 of file zic.c.

const char* leapsec

static

Definition at line 562 of file zic.c.

bool leapseen

static

Definition at line 168 of file zic.c.

const int len_months[2][MONSPERYEAR]

static

Initial value:

= {
    {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
    {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
}

Definition at line 361 of file zic.c.

const int len_years[2]

static

Initial value:

= {
    DAYSPERNYEAR, DAYSPERLYEAR
}

Definition at line 366 of file zic.c.

struct lookup const line_codes[]

static

Initial value:

= {
    {"Rule", LC_RULE},
    {"Zone", LC_ZONE},
    {"Link", LC_LINK},
    {"Leap", LC_LEAP},
    {NULL, 0}
}

Definition at line 296 of file zic.c.

lineno_t linenum

static

Definition at line 171 of file zic.c.

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

struct link* links

static

Definition at line 283 of file zic.c.

int max_abbrvar_len = PERCENT_Z_LEN_BOUND

static

Definition at line 172 of file zic.c.

Referenced by outzone().