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* zic.c: Output version-2 format files if possible.

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We don't know of any clients where this makes a difference, but it
is a more-conservative change, as in theory older clients could
reject version-3 format files merely because of the version number.
(ZIC_VERSION_PRE_2013): New macro.
(writezone): New arg 'version'.  All callers changed.
(outzone): Output version-2 format files unless the capabilities
of version 3 are used.
This commit is contained in:
Paul Eggert
2013-09-15 23:22:33 -05:00
parent 9ae173df4c
commit 738ad89a82
1 changed files with 6 additions and 3 deletions
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9
zic.c
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@@ -10,6 +10,7 @@
#include <stdarg.h>
#define ZIC_VERSION_PRE_2013 '2'
#define ZIC_VERSION '3'
typedef int_fast64_t zic_t;
@@ -1386,7 +1387,7 @@ is32(const zic_t x)
}
static void
writezone(const char *const name, const char *const string)
writezone(const char *const name, const char *const string, char version)
{
register FILE * fp;
register int i, j;
@@ -1639,7 +1640,7 @@ writezone(const char *const name, const char *const string)
#define DO(field) ((void) fwrite(tzh.field, sizeof tzh.field, 1, fp))
tzh = tzh0;
(void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
tzh.tzh_version[0] = ZIC_VERSION;
tzh.tzh_version[0] = version;
convert(thistypecnt, tzh.tzh_ttisgmtcnt);
convert(thistypecnt, tzh.tzh_ttisstdcnt);
convert(thisleapcnt, tzh.tzh_leapcnt);
@@ -2009,6 +2010,7 @@ outzone(const struct zone * const zpfirst, const int zonecount)
register int prodstic; /* all rules are min to max */
register int compat;
register int do_extend;
register char version;
max_abbr_len = 2 + max_format_len + max_abbrvar_len;
max_envvar_len = 2 * max_abbr_len + 5 * 9;
@@ -2058,6 +2060,7 @@ outzone(const struct zone * const zpfirst, const int zonecount)
** 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 && compat != 0 && compat != YEAR_BY_YEAR_ZONE) {
if (compat < 0)
@@ -2307,7 +2310,7 @@ error(_("can't determine time zone abbreviation to use just after until time"));
addtt(rpytime(&xr, max_year + 1), typecnt-1);
}
}
writezone(zpfirst->z_name, envvar);
writezone(zpfirst->z_name, envvar, version);
free(startbuf);
free(ab);
free(envvar);