diff options
Diffstat (limited to 'timezone/zic.c')
| -rw-r--r-- | timezone/zic.c | 73 |
1 files changed, 67 insertions, 6 deletions
diff --git a/timezone/zic.c b/timezone/zic.c index 01d9f135bd..1ea7b18eb6 100644 --- a/timezone/zic.c +++ b/timezone/zic.c @@ -3,7 +3,7 @@ ** 2006-07-17 by Arthur David Olson. */ -static char elsieid[] = "@(#)zic.c 8.19"; +static char elsieid[] = "@(#)zic.c 8.25"; #include "private.h" #include "locale.h" @@ -1621,6 +1621,53 @@ const char * const string; 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). + */ + { + register 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] = TRUE; + 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] = FALSE; + 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; @@ -1835,16 +1882,16 @@ const long gmtoff; register int week; if (rp->r_dycode == DC_DOWGEQ) { - week = 1 + rp->r_dayofmonth / DAYSPERWEEK; - if ((week - 1) * DAYSPERWEEK + 1 != rp->r_dayofmonth) + if ((rp->r_dayofmonth % DAYSPERWEEK) != 1) return -1; + week = 1 + rp->r_dayofmonth / DAYSPERWEEK; } else if (rp->r_dycode == DC_DOWLEQ) { if (rp->r_dayofmonth == len_months[1][rp->r_month]) week = 5; else { - week = 1 + rp->r_dayofmonth / DAYSPERWEEK; - if (week * DAYSPERWEEK - 1 != rp->r_dayofmonth) + if ((rp->r_dayofmonth % DAYSPERWEEK) != 0) return -1; + week = rp->r_dayofmonth / DAYSPERWEEK; } } else return -1; /* "cannot happen" */ (void) sprintf(result, "M%d.%d.%d", @@ -1921,7 +1968,7 @@ const int zonecount; if (stdrp != NULL && stdrp->r_hiyear == 2037) return; } - if (stdrp == NULL && zp->z_nrules != 0) + if (stdrp == NULL && (zp->z_nrules != 0 || zp->z_stdoff != 0)) return; abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar; doabbr(result, zp->z_format, abbrvar, FALSE, TRUE); @@ -1972,6 +2019,7 @@ const int zonecount; register char * envvar; register int max_abbr_len; register int max_envvar_len; + register int prodstic; /* all rules are min to max */ max_abbr_len = 2 + max_format_len + max_abbrvar_len; max_envvar_len = 2 * max_abbr_len + 5 * 9; @@ -1986,6 +2034,7 @@ const int zonecount; timecnt = 0; typecnt = 0; charcnt = 0; + prodstic = zonecount == 1; /* ** Thanks to Earl Chew ** for noting the need to unconditionally initialize startttisstd. @@ -2007,6 +2056,8 @@ const int zonecount; updateminmax(rp->r_loyear); if (rp->r_hiwasnum) updateminmax(rp->r_hiyear); + if (rp->r_lowasnum || rp->r_hiwasnum) + prodstic = FALSE; } } /* @@ -2029,6 +2080,16 @@ wp = ecpyalloc(_("no POSIX environment variable for zone")); if (max_year <= INT_MAX - YEARSPERREPEAT) max_year += YEARSPERREPEAT; else max_year = INT_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 + YEARSPERREPEAT; + } } /* ** For the benefit of older systems, |