/*
* This file is in the public domain, so clarified as of
* 2006-07-17 by Arthur David Olson.
*
* IDENTIFICATION
* src/timezone/zic.c
*/
#include "postgres_fe.h"
#include <locale.h>
#include <sys/stat.h>
#include <time.h>
#include "pg_getopt.h"
#include "private.h"
#include "tzfile.h"
#define ZIC_VERSION_PRE_2013 '2'
#define ZIC_VERSION '3'
typedef int64 zic_t;
#define ZIC_MIN PG_INT64_MIN
#define ZIC_MAX PG_INT64_MAX
#ifndef ZIC_MAX_ABBR_LEN_WO_WARN
#define ZIC_MAX_ABBR_LEN_WO_WARN 6
#endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */
#ifndef WIN32
#ifdef S_IRUSR
#define MKDIR_UMASK (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
#else
#define MKDIR_UMASK 0755
#endif
#endif
struct rule
{
const char *r_filename;
int r_linenum;
const char *r_name;
zic_t r_loyear; /* for example, 1986 */
zic_t r_hiyear; /* for example, 1986 */
const char *r_yrtype;
bool r_lowasnum;
bool r_hiwasnum;
int r_month; /* 0..11 */
int r_dycode; /* see below */
int r_dayofmonth;
int r_wday;
zic_t r_tod; /* time from midnight */
bool r_todisstd; /* above is standard time if 1 or wall clock
* time if 0 */
bool r_todisgmt; /* above is GMT if 1 or local time if 0 */
zic_t r_stdoff; /* offset from standard time */
const char *r_abbrvar; /* variable part of abbreviation */
int r_todo; /* a rule to do (used in outzone) */
zic_t r_temp; /* used in outzone */
};
/*
* r_dycode r_dayofmonth r_wday
*/
#define DC_DOM 0 /* 1..31 */ /* unused */
#define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
#define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
struct zone
{
const char *z_filename;
int z_linenum;
const char *z_name;
zic_t z_gmtoff;
const char *z_rule;
const char *z_format;
char z_format_specifier;
zic_t z_stdoff;
struct rule *z_rules;
int z_nrules;
struct rule z_untilrule;
zic_t z_untiltime;
};
extern 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, 0);
static void error(const char *string,...) pg_attribute_printf(1, 2);
static void warning(const char *string,...) pg_attribute_printf(1, 2);
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 *fromfield, const char *tofield);
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 int itsdir(const char *name);
static bool is_alpha(char a);
static char lowerit(char);
static bool mkdirs(char *);
static void newabbr(const char *abbr);
static zic_t oadd(zic_t t1, zic_t t2);
static void outzone(const struct zone * zp, int 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(int year, const char *type);
/* Bound on length of what %z can expand to. */
enum
{
PERCENT_Z_LEN_BOUND = sizeof "+995959" - 1};
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 int 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 int rlinenum;
static const char *progname;
static int timecnt;
static int timecnt_alloc;
static int typecnt;
/*
* Line codes.
*/
#define LC_RULE 0
#define LC_ZONE 1
#define LC_LINK 2
#define LC_LEAP 3
/*
* Which fields are which on a Zone line.
*/
#define ZF_NAME 1
#define ZF_GMTOFF 2
#define ZF_RULE 3
#define ZF_FORMAT 4
#define ZF_TILYEAR 5
#define ZF_TILMONTH 6
#define ZF_TILDAY 7
#define ZF_TILTIME 8
#define ZONE_MINFIELDS 5
#define ZONE_MAXFIELDS 9
/*
* Which fields are which on a Zone continuation line.
*/
#define ZFC_GMTOFF 0
#define ZFC_RULE 1
#define ZFC_FORMAT 2
#define ZFC_TILYEAR 3
#define ZFC_TILMONTH 4
#define ZFC_TILDAY 5
#define ZFC_TILTIME 6
#define ZONEC_MINFIELDS 3
#define ZONEC_MAXFIELDS 7
/*
* Which files are which on a Rule line.
*/
#define RF_NAME 1
#define RF_LOYEAR 2
#define RF_HIYEAR 3
#define RF_COMMAND 4
#define RF_MONTH 5
#define RF_DAY 6
#define RF_TOD 7
#define RF_STDOFF 8
#define RF_ABBRVAR 9
#define RULE_FIELDS 10
/*
* Which fields are which on a Link line.
*/
#define LF_FROM 1
#define LF_TO 2
#define LINK_FIELDS 3
/*
* Which fields are which on a Leap line.
*/
#define LP_YEAR 1
#define LP_MONTH 2
#define LP_DAY 3
#define LP_TIME 4
#define LP_CORR 5
#define LP_ROLL 6
#define LEAP_FIELDS 7
/*
* Year synonyms.
*/
#define YR_MINIMUM 0
#define YR_MAXIMUM 1
#define YR_ONLY 2
static struct rule *rules;
static int nrules; /* number of rules */
static int nrules_alloc;
static struct zone *zones;
static int nzones; /* number of zones */
static int nzones_alloc;
struct link
{
const char *l_filename;
int l_linenum;
const char *l_from;
const char *l_to;
};
static struct link *links;
static int nlinks;
static int nlinks_alloc;
struct lookup
{
const char *l_word;
const int l_value;
};
static struct lookup const *byword(const char *string,
const struct lookup * lp);
static struct lookup const line_codes[] = {
{"Rule", LC_RULE},
{"Zone", LC_ZONE},
{"Link", LC_LINK},
{"Leap", LC_LEAP},
{NULL, 0}
};
static struct lookup const mon_names[] = {
{"January", TM_JANUARY},
{"February", TM_FEBRUARY},
{"March", TM_MARCH},
{"April", TM_APRIL},
{"May", TM_MAY},
{"June", TM_JUNE},
{"July", TM_JULY},
{"August", TM_AUGUST},
{"September", TM_SEPTEMBER},
{"October", TM_OCTOBER},
{"November", TM_NOVEMBER},
{"December", TM_DECEMBER},
{NULL, 0}
};
static struct lookup const wday_names[] = {
{"Sunday", TM_SUNDAY},
{"Monday", TM_MONDAY},
{"Tuesday", TM_TUESDAY},
{"Wednesday", TM_WEDNESDAY},
{"Thursday", TM_THURSDAY},
{"Friday", TM_FRIDAY},
{"Saturday", TM_SATURDAY},
{NULL, 0}
};
static struct lookup const lasts[] = {
{"last-Sunday", TM_SUNDAY},
{"last-Monday", TM_MONDAY},
{"last-Tuesday", TM_TUESDAY},
{"last-Wednesday", TM_WEDNESDAY},
{"last-Thursday", TM_THURSDAY},
{"last-Friday", TM_FRIDAY},
{"last-Saturday", TM_SATURDAY},
{NULL, 0}
};
static struct lookup const begin_years[] = {
{"minimum", YR_MINIMUM},
{"maximum", YR_MAXIMUM},
{NULL, 0}
};
static struct lookup const end_years[] = {
{"minimum", YR_MINIMUM},
{"maximum", YR_MAXIMUM},
{"only", YR_ONLY},
{NULL, 0}
};
static struct lookup const leap_types[] = {
{"Rolling", true},
{"Stationary", false},
{NULL, 0}
};
static const int len_months[2][MONSPERYEAR] = {
{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
};
static const int len_years[2] = {
DAYSPERNYEAR, DAYSPERLYEAR
};
static struct attype
{
zic_t at;
unsigned char type;
} *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];
/*
* Memory allocation.
*/
static void
memory_exhausted(const char *msg)
{
fprintf(stderr, _("%s: Memory exhausted: %s\n"), progname, msg);
exit(EXIT_FAILURE);
}
static size_t
size_product(size_t nitems, size_t itemsize)
{
if (SIZE_MAX / itemsize < nitems)
memory_exhausted(_("size overflow"));
return nitems * itemsize;
}
static void *
memcheck(void *ptr)
{
if (ptr == NULL)
memory_exhausted(strerror(errno));
return ptr;
}
static void *
emalloc(size_t size)
{
return memcheck(malloc(size));
}
static void *
erealloc(void *ptr, size_t size)
{
return memcheck(realloc(ptr, size));
}
static char *
ecpyalloc(char const * str)
{
return memcheck(strdup(str));
}
static void *
growalloc(void *ptr, size_t itemsize, int nitems, int *nitems_alloc)
{
if (nitems < *nitems_alloc)
return ptr;
else
{
int amax = INT_MAX < SIZE_MAX ? INT_MAX : SIZE_MAX;
if ((amax - 1) / 3 * 2 < *nitems_alloc)
memory_exhausted(_("int overflow"));
*nitems_alloc = *nitems_alloc + (*nitems_alloc >> 1) + 1;
return erealloc(ptr, size_product(*nitems_alloc, itemsize));
}
}
/*
* Error handling.
*/
static void
eats(const char *name, int num, const char *rname, int rnum)
{
filename = name;
linenum = num;
rfilename = rname;
rlinenum = rnum;
}
static void
eat(const char *name, int num)
{
eats(name, num, NULL, -1);
}
static void
verror(const char *string, va_list args)
{
/*
* Match the format of "cc" to allow sh users to zic ... 2>&1 | error -t
* "*" -v on BSD systems.
*/
if (filename)
fprintf(stderr, _("\"%s\", line %d: "), filename, linenum);
vfprintf(stderr, string, args);
if (rfilename != NULL)
fprintf(stderr, _(" (rule from \"%s\", line %d)"),
rfilename, rlinenum);
fprintf(stderr, "\n");
}
static void
error(const char *string,...)
{
va_list args;
va_start(args, string);
verror(string, args);
va_end(args);
errors = true;
}
static void
warning(const char *string,...)
{
va_list args;
fprintf(stderr, _("warning: "));
va_start(args, string);
verror(string, args);
va_end(args);
warnings = true;
}
static void
close_file(FILE *stream, char const * name)
{
char const *e = (ferror(stream) ? _("I/O error")
: fclose(stream) != 0 ? strerror(errno) : NULL);
if (e)
{
fprintf(stderr, "%s: ", progname);
if (name)
fprintf(stderr, "%s: ", name);
fprintf(stderr, "%s\n", e);
exit(EXIT_FAILURE);
}
}
static void
usage(FILE *stream, int status)
{
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);
exit(status);
}
static const char *psxrules;
static const char *lcltime;
static const char *directory;
static const char *leapsec;
static const char *yitcommand;
int
main(int argc, char *argv[])
{
int i;
int j;
int c;
#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 (i = 1; i < argc; ++i)
if (strcmp(argv[i], "--version") == 0)
{
printf("zic %s\n", PG_VERSION);
close_file(stdout, NULL);
return EXIT_SUCCESS;
}
else if (strcmp(argv[i], "--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 (i = optind; i < argc; ++i)
infile(argv[i]);
if (errors)
return EXIT_FAILURE;
associate();
for (i = 0; i < nzones; i = j)
{
/*
* Find the next non-continuation zone entry.
*/
for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
continue;
outzone(&zones[i], j - i);
}
/*
* Make links.
*/
for (i = 0; i < nlinks; ++i)
{
eat(links[i].l_filename, links[i].l_linenum);
dolink(links[i].l_from, links[i].l_to);
if (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);
}
if (psxrules != NULL)
{
eat(_("command line"), 1);
dolink(psxrules, TZDEFRULES);
}
if (warnings && (ferror(stderr) || fclose(stderr) != 0))
return EXIT_FAILURE;
return errors ? EXIT_FAILURE : EXIT_SUCCESS;
}
static bool
componentcheck(char const * name, char const * component,
char const * component_end)
{
enum
{
component_len_max = 14};
size_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] == '.')
{
error(_("file name '%s' contains '%.*s' component"),
name, (int) component_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 bool
namecheck(const char *name)
{
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 char *
relname(char const * dir, char const * base)
{
if (*base == '/')
return ecpyalloc(base);
else
{
size_t dir_len = strlen(dir);
bool needs_slash = dir_len && dir[dir_len - 1] != '/';
char *result = emalloc(dir_len + needs_slash + strlen(base) + 1);
result[dir_len] = '/';
strcpy(result + dir_len + needs_slash, base);
return memcpy(result, dir, dir_len);
}
}
static void
dolink(char const * fromfield, char const * tofield)
{
char *fromname;
char *toname;
int fromisdir;
fromname = relname(directory, fromfield);
toname = relname(directory, tofield);
/*
* We get to be careful here since there's a fair chance of root running
* us.
*/
fromisdir = itsdir(fromname);
if (fromisdir)
{
char const *e = strerror(fromisdir < 0 ? errno : EPERM);
fprintf(stderr, _("%s: link from %s failed: %s"),
progname, fromname, e);
exit(EXIT_FAILURE);
}
if (link(fromname, toname) != 0)
{
int link_errno = errno;
bool retry_if_link_supported = false;
if (link_errno == ENOENT || link_errno == ENOTSUP)
{
if (!mkdirs(toname))
exit(EXIT_FAILURE);
retry_if_link_supported = true;
}
if ((link_errno == EEXIST || link_errno == ENOTSUP)
&& itsdir(toname) == 0
&& (remove(toname) == 0 || errno == ENOENT))
retry_if_link_supported = true;
if (retry_if_link_supported && link_errno != ENOTSUP)
link_errno = link(fromname, toname) == 0 ? 0 : errno;
if (link_errno != 0)
{
#ifdef HAVE_SYMLINK
const char *s = fromfield;
const char *t;
char *p;
size_t dotdots = 0;
char *symlinkcontents;
int symlink_result;
do
t = s;
while ((s = strchr(s, '/'))
&& strncmp(fromfield, tofield, ++s - fromfield) == 0);
for (s = tofield + (t - fromfield); *s; s++)
dotdots += *s == '/';
symlinkcontents = emalloc(3 * dotdots + strlen(t) + 1);
for (p = symlinkcontents; dotdots-- != 0; p += 3)
memcpy(p, "../", 3);
strcpy(p, t);
symlink_result = symlink(symlinkcontents, toname);
free(symlinkcontents);
if (symlink_result == 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(fromname, "rb");
if (!fp)
{
const char *e = strerror(errno);
fprintf(stderr,
_("%s: Can't read %s: %s\n"),
progname, fromname, e);
exit(EXIT_FAILURE);
}
tp = fopen(toname, "wb");
if (!tp)
{
const char *e = strerror(errno);
fprintf(stderr,
_("%s: Can't create %s: %s\n"),
progname, toname, e);
exit(EXIT_FAILURE);
}
while ((c = getc(fp)) != EOF)
putc(c, tp);
close_file(fp, fromname);
close_file(tp, toname);
if (link_errno != ENOTSUP)
warning(_("copy used because hard link failed: %s"),
strerror(link_errno));
}
}
}
free(fromname);
free(toname);
}
#define TIME_T_BITS_IN_FILE 64
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);
/*
* Estimated time of the Big Bang, in seconds since the POSIX epoch.
* rounded downward to the negation of a power of two that is
* comfortably outside the error bounds.
*
* zic does not output time stamps before this, partly because they
* are physically suspect, and partly because GNOME mishandles them; see
* GNOME bug 730332 <https://bugzilla.gnome.org/show_bug.cgi?id=730332>.
*
* For the time of the Big Bang, see:
*
* Ade PAR, Aghanim N, Armitage-Caplan C et al. Planck 2013 results.
* I. Overview of products and scientific results.
* arXiv:1303.5062 2013-03-20 20:10:01 UTC
* <http://arxiv.org/pdf/1303.5062v1> [PDF]
*
* Page 36, Table 9, row Age/Gyr, column Planck+WP+highL+BAO 68% limits
* gives the value 13.798 plus-or-minus 0.037 billion years.
* Multiplying this by 1000000000 and then by 31557600 (the number of
* seconds in an astronomical year) gives a value that is comfortably
* less than 2**59, so BIG_BANG is - 2**59.
*
* BIG_BANG is approximate, and may change in future versions.
* Please do not rely on its exact value.
*/
#ifndef BIG_BANG
#define BIG_BANG (- (((zic_t) 1) << 59))
#endif
static const zic_t big_bang_time = BIG_BANG;
/* Return 1 if NAME is a directory, 0 if it's something else, -1 if trouble. */
static int
itsdir(char const * name)
{
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)
{
char *nameslashdot = relname(name, ".");
bool dir = stat(nameslashdot, &st) == 0 || errno == EOVERFLOW;
free(nameslashdot);
return dir;
}
return -1;
}
/*
* Associate sets of rules with zones.
*/
/*
* Sort by rule name.
*/
static int
rcomp(const void *cp1, const void *cp2)
{
return strcmp(((const struct rule *) cp1)->r_name,
((const struct rule *) cp2)->r_name);
}
static void
associate(void)
{
struct zone *zp;
struct rule *rp;
int base,
out;
int i,
j;
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 void
infile(const char *name)
{
FILE *fp;
char **fields;
char *cp;
const struct lookup *lp;
int nfields;
bool wantcont;
int num;
char buf[BUFSIZ];
if (strcmp(name, "-") == 0)
{
name = _("standard input");
fp = stdin;
}
else if ((fp = fopen(name, "r")) == NULL)
{
const char *e = strerror(errno);
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 ((int) (lp->l_value))
{
case LC_RULE:
inrule(fields, nfields);
wantcont = false;
break;
case LC_ZONE:
wantcont = inzone(fields, nfields);
break;
case LC_LINK:
inlink(fields, nfields);
wantcont = false;
break;
case LC_LEAP:
if (name != leapsec)
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, filename);
if (wantcont)
error(_("expected continuation line not found"));
}
/*
* Convert a string of one of the forms
* h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
* into a number of seconds.
* A null string maps to zero.
* Call error with errstring and return zero on errors.
*/
static zic_t
gethms(char const * string, char const * errstring, bool signable)
{
/* 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
inrule(char **fields, int nfields)
{
static struct rule r;
if (nfields != RULE_FIELDS)
{
error(_("wrong number of fields on Rule line"));
return;
}
if (*fields[RF_NAME] == '\0')
{
error(_("nameless rule"));
return;
}
r.r_filename = filename;
r.r_linenum = linenum;
r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), true);
rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
r.r_name = ecpyalloc(fields[RF_NAME]);
r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
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
inzone(char **fields, int nfields)
{
int 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 %d)"),
fields[ZF_NAME],
zones[i].z_filename,
zones[i].z_linenum);
return false;
}
return inzsub(fields, nfields, false);
}
static bool
inzcont(char **fields, int nfields)
{
if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS)
{
error(_("wrong number of fields on Zone continuation line"));
return false;
}
return inzsub(fields, nfields, true);
}
static bool
inzsub(char **fields, int nfields, bool iscont)
{
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], '%')) != 0)
{
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 void
inleap(char **fields, int nfields)
{
const char *cp;
const struct lookup *lp;
int 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 < big_bang_time)
{
error(_("leap second precedes Big Bang"));
return;
}
leapadd(t, positive, lp->l_value, count);
}
}
static void
inlink(char **fields, int nfields)
{
struct link l;
if (nfields != LINK_FIELDS)
{
error(_("wrong number of fields on Link line"));
return;
}
if (*fields[LF_FROM] == '\0')
{
error(_("blank FROM field on Link line"));
return;
}
if (!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
rulesub(struct rule * rp, const char *loyearp, const char *hiyearp,
const char *typep, const char *monthp, const char *dayp,
const char *timep)
{
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 ((int) 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 ((int) 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 void
convert(const int32 val, char *const buf)
{
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)
{
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 void
puttzcode(const int32 val, FILE *const fp)
{
char buf[4];
convert(val, buf);
fwrite(buf, sizeof buf, 1, fp);
}
static void
puttzcode64(const zic_t val, FILE *const fp)
{
char buf[8];
convert64(val, buf);
fwrite(buf, sizeof buf, 1, fp);
}
static int
atcomp(const void *avp, const void *bvp)
{
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 bool
is32(const zic_t x)
{
return x == ((zic_t) ((int32) x));
}
static void
writezone(const char *const name, const char *const string, char version)
{
FILE *fp;
int i,
j;
int leapcnt32,
leapi32;
int timecnt32,
timei32;
int pass;
char *fullname;
static const struct tzhead tzh0;
static struct tzhead tzh;
zic_t *ats = emalloc(size_product(timecnt, sizeof *ats + 1));
void *typesptr = ats + timecnt;
unsigned char *types = typesptr;
/*
* Sort.
*/
if (timecnt > 1)
qsort(attypes, timecnt, sizeof *attypes, atcomp);
/*
* Optimize.
*/
{
int fromi;
int toi;
toi = 0;
fromi = 0;
while (fromi < timecnt && attypes[fromi].at < big_bang_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[toi - 1].type != attypes[fromi].type)
attypes[toi++] = attypes[fromi];
}
timecnt = toi;
}
if (noise && timecnt > 1200)
warning(_("pre-2014 clients may mishandle"
" more than 1200 transition times"));
/*
* Transfer.
*/
for (i = 0; i < timecnt; ++i)
{
ats[i] = attypes[i].at;
types[i] = attypes[i].type;
}
/*
* Correct for leap seconds.
*/
for (i = 0; i < timecnt; ++i)
{
j = leapcnt;
while (--j >= 0)
if (ats[i] > trans[j] - corr[j])
{
ats[i] = tadd(ats[i], corr[j]);
break;
}
}
/*
* 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;
}
fullname = relname(directory, name);
/*
* Remove old file, if any, to snap links.
*/
if (itsdir(fullname) == 0 && remove(fullname) != 0 && errno != ENOENT)
{
const char *e = strerror(errno);
fprintf(stderr, _("%s: Cannot remove %s: %s\n"),
progname, fullname, e);
exit(EXIT_FAILURE);
}
if ((fp = fopen(fullname, "wb")) == NULL)
{
if (!mkdirs(fullname))
exit(EXIT_FAILURE);
if ((fp = fopen(fullname, "wb")) == NULL)
{
const char *e = strerror(errno);
fprintf(stderr, _("%s: Cannot create %s: %s\n"),
progname, fullname, e);
exit(EXIT_FAILURE);
}
}
for (pass = 1; pass <= 2; ++pass)
{
int thistimei,
thistimecnt;
int thisleapi,
thisleapcnt;
int thistimelim,
thisleaplim;
int writetype[TZ_MAX_TYPES];
int typemap[TZ_MAX_TYPES];
int thistypecnt;
char thischars[TZ_MAX_CHARS];
char thischarcnt;
int indmap[TZ_MAX_CHARS];
if (pass == 1)
{
thistimei = timei32;
thistimecnt = timecnt32;
thisleapi = leapi32;
thisleapcnt = leapcnt32;
}
else
{
thistimei = 0;
thistimecnt = timecnt;
thisleapi = 0;
thisleapcnt = leapcnt;
}
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[(int) 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, fullname);
free(ats);
free(fullname);
}
static char const *
abbroffset(char *buf, zic_t offset)
{
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 size_t
doabbr(char *abbr, struct zone const * zp, char const * letters,
zic_t stdoff, bool doquotes)
{
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
updateminmax(const zic_t x)
{
if (min_year > x)
min_year = x;
if (max_year < x)
max_year = x;
}
static int
stringoffset(char *result, zic_t offset)
{
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)
{
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
rule_cmp(struct rule const * a, struct rule const * b)
{
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;
}
enum
{
YEAR_BY_YEAR_ZONE = 1};
static int
stringzone(char *result, const struct zone * const zpfirst, const int zonecount)
{
const struct zone *zp;
struct rule *rp;
struct rule *stdrp;
struct rule *dstrp;
int 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 void
outzone(const struct zone * zpfirst, int zonecount)
{
const struct zone *zp;
struct rule *rp;
int 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;
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 2037.
*/
if (min_year > 1900)
min_year = 1900;
if (max_year < 2037)
max_year = 2037;
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 > big_bang_time;
useuntil = i < (zonecount - 1);
if (useuntil && zp->z_untiltime <= big_bang_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(big_bang_time, type);
}
else
for (year = min_year; year <= max_year; ++year)
{
if (useuntil && year > zp->z_untilrule.r_hiyear)
break;
/*
* Mark which rules to do in the current year. For those to
* do, calculate rpytime(rp, year);
*/
for (j = 0; j < zp->z_nrules; ++j)
{
rp = &zp->z_rules[j];
eats(zp->z_filename, zp->z_linenum,
rp->r_filename, rp->r_linenum);
rp->r_todo = year >= rp->r_loyear &&
year <= rp->r_hiyear &&
yearistype(year, rp->r_yrtype);
if (rp->r_todo)
rp->r_temp = rpytime(rp, year);
}
for (;;)
{
int 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);
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 (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))
{
/*
* Create new type code for the redundant entry, to prevent it
* being optimized away.
*/
if (typecnt >= TZ_MAX_TYPES)
{
error(_("too many local time types"));
exit(EXIT_FAILURE);
}
gmtoffs[typecnt] = gmtoffs[lastat->type];
isdsts[typecnt] = isdsts[lastat->type];
ttisstds[typecnt] = ttisstds[lastat->type];
ttisgmts[typecnt] = ttisgmts[lastat->type];
abbrinds[typecnt] = abbrinds[lastat->type];
++typecnt;
addtt(rpytime(&xr, max_year + 1), typecnt - 1);
}
}
writezone(zpfirst->z_name, envvar, version);
free(startbuf);
free(ab);
free(envvar);
}
static void
addtt(zic_t starttime, int type)
{
if (starttime <= big_bang_time ||
(timecnt == 1 && attypes[0].at < big_bang_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].type = type;
++timecnt;
}
static int
addtype(zic_t gmtoff, char const * abbr, bool isdst, bool ttisstd, bool ttisgmt)
{
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
leapadd(zic_t t, bool positive, int rolling, int count)
{
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);
}
static void
adjleap(void)
{
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 bool
yearistype(int year, const char *type)
{
static char *buf;
int result;
if (type == NULL || *type == '\0')
return true;
buf = erealloc(buf, 132 + strlen(yitcommand) + strlen(type));
sprintf(buf, "%s %d %s", yitcommand, year, type);
result = system(buf);
if (WIFEXITED(result))
switch (WEXITSTATUS(result))
{
case 0:
return true;
case 1:
return false;
}
error(_("Wild result from command execution"));
fprintf(stderr, _("%s: command was '%s', result was %d\n"),
progname, buf, result);
for (;;)
exit(EXIT_FAILURE);
}
/* Is A a space character in the C locale? */
static bool
is_space(char a)
{
switch (a)
{
default:
return false;
case ' ':
case '\f':
case '\n':
case '\r':
case '\t':
case '\v':
return true;
}
}
/* Is A an alphabetic character in the C locale? */
static bool
is_alpha(char a)
{
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;
}
}
/* If A is an uppercase character in the C locale, return its lowercase
* counterpart. Otherwise, return A. */
static char
lowerit(char a)
{
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';
}
}
/* case-insensitive equality */
static bool
ciequal(const char *ap, const char *bp)
{
while (lowerit(*ap) == lowerit(*bp++))
if (*ap++ == '\0')
return true;
return false;
}
static bool
itsabbr(const char *abbr, const char *word)
{
if (lowerit(*abbr) != lowerit(*word))
return false;
++word;
while (*++abbr != '\0')
do
{
if (*word == '\0')
return false;
} while (lowerit(*word++) != lowerit(*abbr));
return true;
}
static const struct lookup *
byword(const char *word, const struct lookup * table)
{
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 char **
getfields(char *cp)
{
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(1);
}
} while (*cp && *cp != '#' && !is_space(*cp));
if (is_space(*cp))
++cp;
*dp = '\0';
}
array[nsubs] = NULL;
return array;
}
static void
time_overflow(void)
{
error(_("time overflow"));
exit(EXIT_FAILURE);
}
static zic_t
oadd(zic_t t1, zic_t t2)
{
if (t1 < 0 ? t2 < ZIC_MIN - t1 : ZIC_MAX - t1 < t2)
time_overflow();
return t1 + t2;
}
static zic_t
tadd(zic_t t1, zic_t t2)
{
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;
}
/*
* Given a rule, and a year, compute the date (in seconds since January 1,
* 1970, 00:00 LOCAL time) in that year that the rule refers to.
*/
static zic_t
rpytime(const struct rule * rp, zic_t wantedy)
{
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 void
newabbr(const char *string)
{
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 bool
mkdirs(char *argname)
{
char *name;
char *cp;
if (argname == NULL || *argname == '\0')
return true;
cp = name = ecpyalloc(argname);
while ((cp = strchr(cp + 1, '/')) != NULL)
{
*cp = '\0';
#ifdef WIN32
/*
* DOS drive specifier?
*/
if (is_alpha(name[0]) && name[1] == ':' && name[2] == '\0')
{
*cp = '/';
continue;
}
#endif /* WIN32 */
/*
* Try to create it. It's OK if creation fails because the directory
* already exists, perhaps because some other process just created it.
*/
if (mkdir(name, MKDIR_UMASK) != 0)
{
int err = errno;
if (itsdir(name) <= 0)
{
char const *e = strerror(err);
warning(_("%s: Can't create directory"
" %s: %s"),
progname, name, e);
free(name);
return false;
}
}
*cp = '/';
}
free(name);
return true;
}
#ifdef WIN32
/*
* To run on win32
*/
int
link(const char *oldpath, const char *newpath)
{
if (!CopyFile(oldpath, newpath, false))
{
_dosmaperr(GetLastError());
return -1;
}
return 0;
}
#endif