the command "date -d'2005-03-27 +1 day'" succeeds once again, even
when run in a time zone for which daylight savings time is in effect
for the starting date.
(RELATIVE_TIME_0): New constant.
(parser_control): Use relative_time instead of doing it ourselves.
(%union): Add new relative_time rel member.
(tYEAR_UNIT, tMONTH_UNIT, tHOUR_UNIT, tMINUTE_UNIT, tSEC_UNIT):
Now typeless.
(relunit, relunit_snumber): Now of type rel.
(zone, rel, relunit, get_date): Adjust to above changes.
(time_zone_table): Remove GMT, UT, UTC entries; they're now in
universal_time_zone_table.
(lookup_zone): Prefer universal_time_zone_table to
local_time_zone_table, so that "GMT" time stamps are allowed in
London during the summer. Problem reported by Ian Abbott.
count, since there's no maximum. All uses changed.
Add member dsts_seen.
(local_zone): Accumulate dsts_seen rather than relying on tm_isdst
not being INT_MAX.
(get_date): Initialize dsts_seen, and check that it doesn't go over 1.
Use pc_rels_seen to decide whther a date is absolute.
(number): Don't overwrite year.
(get_date): Initialize pc.year.digits to 0, not 4, to enable above check.
(time_zone_hhmm): New function.
Expect 14 shift-reduce conflicts, not 13.
(o_colon_minutes): New rule.
(time, zone): Use it to add support for +HH:MM, UTC+HH:MM.
(yylex): Set the "negative" member of signed numbers.
assume C89 and don't need to worry about 'const'.
Similarly, include "unlocked-io.h" near start, not in middle.
Include <limits.h>.
(textint.value): Use long int rather than int.
(textint.digits): Use size_t rather than int.
(BILLION, LOG10_BILLION): New constants.
(parser_control): New member rel_ns. Members day_ordinal,
time_zone, month, day, hour, minutes, rel_year, rel_month,
rel_day, rel_hour, rel_minutes, rel_seconds
are now long int, not int. Member seconds is now struct timespec,
not int. New member timespec_seen. Members dates_seen, days_seen,
local_zones_seen, rels_seen, times_seen, zones_seen are now size_t,
not int.
(%union.intval): Now long int, not int.
New member timespec.
(tSDECIMAL_NUMBER, tUDECIMAL_NUMBER): New tokens.
(seconds, signed_seconds, unsigned_seconds): New nonterminals.
(spec): Now is a timespec or an item list.
(timespec, items): New nonterminals.
(time, rel, relunit, number, get_date):
Add support for fractional seconds.
(time): Fix bug: seconds weren't cleared in "00:00 +0000" syntax.
(gmtime, localtime, mktime): Remove decls; not needed with C89.
(to_hour): First arg is now long int, not int.
(to_year): Returns long int, not int.
Don't treat year -70 like 70.
(tm_diff): Returns long int, not int.
(lookup_word): Use bool instead of int when appropriate.
(yylex): Use size_t for count, not int.
Detect overflow when parsing large integer constants.
Add support for fractions.
(get_date): Make pointers 'const' if possible.
Use more-portable code to detect integer overflow.
(main) [TEST]: Adjust to above changes. Test for localtime failure.
Don't use ctime; it's not reliable if the year has >4 digits.
"yesterday", "today", and "now" rather than tMINUTE_UNIT. Of
course with correspondingly smaller numbers for tomorrow and
yesterday. From Tadayoshi Funaba. Originally installed into
sh-utils on 1999-08-07, but the patch was mistakenly reverted by
the next change to that shared file (but this time in fileutils)
on 1999-08-29.
(textint): New typedef.
(parser_control): Member year changed from int to textint.
All uses changed.
(YYSTYPE): Removed; replaced by %union with int and textint members.
(tDAY, tDAY_UNIT, tDAYZONE, tHOUR_UNIT, tID, tLOCAL_ZONE, tMERIDIAN,
tMINUTE_UNIT, tMONTH, tMONTH_UNIT tSEC_UNIT, tSNUMBER, tUNUMBER,
tYEAR_UNIT, tZONE, o_merid): Now of type <intval>.
(tSNUMBER, tUNUMBER): Now of type <textintval>.
(date, number, to_year): Use width of number in digits, not its value,
to determine whether it's a 2-digit year, or a 2-digit time.
(yylex): Store number of digits of numeric tokens.
Reported by John Kendall.
(parser_control): Changed from struct parser_control to typedef (for
consistency). All uses changed.
(tID): Removed; not used.
(yylex): Return '?' for unknown identifiers, rather than (unused) tID.
(TM_YEAR_BASE): Renamed from TM_YEAR_ORIGIN. All uses changed.
(tm_diff): Renamed from difftm. All uses changed.
Replace body with that taken from GNU C Library 2.1.3pre1.
(get_date): Prefer tm_gmtoff to tm_diff if available.
(number): Handle `Nov 11 1996' example; see Risks Digest 20.55
http://catless.ncl.ac.uk/Risks/20.55.html#subj18
(1999-08-27)
(<stdio.h>): Include only if testing.
(ISUPPER): Remove.
(ISLOWER, PC): New macros.
(<string.h>): Include if HAVE_STRING_H, not USG.
(bcopy): Remove.
(yymaxdepth, ..., yycheck): Don't bother to redefine, since we assume
bison.
(EPOCH_YEAR): Renamed from EPOCH.
(table): Renamed from TABLE.
(meridian): Now an anonymous enum.
(struct parser_control): New type.
(YYLEX_PARAM, YYPARSE_PARAM, YYSTYPE): New macros.
(yyInput, ..., yyRelYear): Migrated into struct parser_control.
(%pure_parser): Added, so that the parser is pure.
(%union): Removed; the type is now just plain int.
All %type directives removed.
(tLOCAL_ZONE): New %token.
(month_day_table): Renamed from MonthDayTable.
(gmtime, localtime, mktime, time): Declare only if not defined.
(meridian_table): New table.
(dst_table): New table.
(units_table): renamed from UnitsTable.
(relative_time_table): Renamed from OtherTable.
(time_zone_table): Renamed from TimezoneTable. Modernized data.
(military_table): Renamed from MilitaryTable.
(to_hour): Renamed from ToHour.
(to_year): Renamed from ToYear.
(lookup_zone): New function.
(LookupWord): Renamed from lookup_word.
Use lookup_zone for time zones.
(yylex): Now reentrant. All callers changed.
(get_date): Add support for local time zone abbreviations.
Make it reentrant.
`yesterday,' `today,' and `now' rather than tMINUTE_UNIT. Of course
with correspondingly smaller numbers for tomorrow and yesterday.
This change does not change the way the code works, since the
grammar rules for the two symbols are analogous.
