44126d85ee
It wasn't being used at all. Let's remove it. Use isdigit(3) directly in comments that referenced it. Also, in those comments, remove an outdated reference to the fact that ISDIGIT_LOCALE(c) might evaluate its argument more than once, which could be true a few commits ago, until IN_CTYPE_DEFINITION(c) was removed. Previously, the definition for ISDIGIT_LOCALE(c) was: #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII)) # define IN_CTYPE_DOMAIN(c) 1 #else # define IN_CTYPE_DOMAIN(c) isascii(c) #endif #define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c)) Which could evaluate 'c' twice on pre-C89 systems (which I hope don't exist nowadays). Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
964 lines
23 KiB
Plaintext
964 lines
23 KiB
Plaintext
%{
|
||
/*
|
||
** Originally written by Steven M. Bellovin <smb@research.att.com> while
|
||
** at the University of North Carolina at Chapel Hill. Later tweaked by
|
||
** a couple of people on Usenet. Completely overhauled by Rich $alz
|
||
** <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990;
|
||
**
|
||
** This grammar has 13 shift/reduce conflicts.
|
||
**
|
||
** This code is in the public domain and has no copyright.
|
||
*/
|
||
|
||
#ifdef HAVE_CONFIG_H
|
||
# include <config.h>
|
||
# ifdef FORCE_ALLOCA_H
|
||
# include <alloca.h>
|
||
# endif
|
||
#endif
|
||
|
||
/* Since the code of getdate.y is not included in the Emacs executable
|
||
itself, there is no need to #define static in this file. Even if
|
||
the code were included in the Emacs executable, it probably
|
||
wouldn't do any harm to #undef it here; this will only cause
|
||
problems if we try to write to a static variable, which I don't
|
||
think this code needs to do. */
|
||
#ifdef emacs
|
||
# undef static
|
||
#endif
|
||
|
||
#include <stdio.h>
|
||
#include <ctype.h>
|
||
#include <time.h>
|
||
|
||
/* ISDIGIT differs from isdigit(3), as follows:
|
||
- Its arg may be any int or unsigned int; it need not be an unsigned char.
|
||
- It's typically faster.
|
||
Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
|
||
only '0' through '9' are digits. Prefer ISDIGIT to isdigit(3) unless
|
||
it's important to use the locale's definition of `digit' even when the
|
||
host does not conform to Posix. */
|
||
#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
|
||
|
||
#include "getdate.h"
|
||
|
||
#include <string.h>
|
||
|
||
/* Some old versions of bison generate parsers that use bcopy.
|
||
That loses on systems that don't provide the function, so we have
|
||
to redefine it here. */
|
||
#if !defined (HAVE_BCOPY) && !defined (bcopy)
|
||
# define bcopy(from, to, len) memcpy ((to), (from), (len))
|
||
#endif
|
||
|
||
/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
|
||
as well as gratuitously global symbol names, so we can have multiple
|
||
yacc generated parsers in the same program. Note that these are only
|
||
the variables produced by yacc. If other parser generators (bison,
|
||
byacc, etc) produce additional global names that conflict at link time,
|
||
then those parser generators need to be fixed instead of adding those
|
||
names to this list. */
|
||
|
||
#define yymaxdepth gd_maxdepth
|
||
#define yyparse gd_parse
|
||
#define yylex gd_lex
|
||
#define yyerror gd_error
|
||
#define yylval gd_lval
|
||
#define yychar gd_char
|
||
#define yydebug gd_debug
|
||
#define yypact gd_pact
|
||
#define yyr1 gd_r1
|
||
#define yyr2 gd_r2
|
||
#define yydef gd_def
|
||
#define yychk gd_chk
|
||
#define yypgo gd_pgo
|
||
#define yyact gd_act
|
||
#define yyexca gd_exca
|
||
#define yyerrflag gd_errflag
|
||
#define yynerrs gd_nerrs
|
||
#define yyps gd_ps
|
||
#define yypv gd_pv
|
||
#define yys gd_s
|
||
#define yy_yys gd_yys
|
||
#define yystate gd_state
|
||
#define yytmp gd_tmp
|
||
#define yyv gd_v
|
||
#define yy_yyv gd_yyv
|
||
#define yyval gd_val
|
||
#define yylloc gd_lloc
|
||
#define yyreds gd_reds /* With YYDEBUG defined */
|
||
#define yytoks gd_toks /* With YYDEBUG defined */
|
||
#define yylhs gd_yylhs
|
||
#define yylen gd_yylen
|
||
#define yydefred gd_yydefred
|
||
#define yydgoto gd_yydgoto
|
||
#define yysindex gd_yysindex
|
||
#define yyrindex gd_yyrindex
|
||
#define yygindex gd_yygindex
|
||
#define yytable gd_yytable
|
||
#define yycheck gd_yycheck
|
||
|
||
static int yylex (void);
|
||
static int yyerror (const char *s);
|
||
|
||
#define EPOCH 1970
|
||
#define HOUR(x) ((x) * 60)
|
||
|
||
#define MAX_BUFF_LEN 128 /* size of buffer to read the date into */
|
||
|
||
/*
|
||
** An entry in the lexical lookup table.
|
||
*/
|
||
typedef struct _TABLE {
|
||
const char *name;
|
||
int type;
|
||
int value;
|
||
} TABLE;
|
||
|
||
|
||
/*
|
||
** Meridian: am, pm, or 24-hour style.
|
||
*/
|
||
typedef enum _MERIDIAN {
|
||
MERam, MERpm, MER24
|
||
} MERIDIAN;
|
||
|
||
|
||
/*
|
||
** Global variables. We could get rid of most of these by using a good
|
||
** union as the yacc stack. (This routine was originally written before
|
||
** yacc had the %union construct.) Maybe someday; right now we only use
|
||
** the %union very rarely.
|
||
*/
|
||
static const char *yyInput;
|
||
static int yyDayOrdinal;
|
||
static int yyDayNumber;
|
||
static int yyHaveDate;
|
||
static int yyHaveDay;
|
||
static int yyHaveRel;
|
||
static int yyHaveTime;
|
||
static int yyHaveZone;
|
||
static int yyTimezone;
|
||
static int yyDay;
|
||
static int yyHour;
|
||
static int yyMinutes;
|
||
static int yyMonth;
|
||
static int yySeconds;
|
||
static int yyYear;
|
||
static MERIDIAN yyMeridian;
|
||
static int yyRelDay;
|
||
static int yyRelHour;
|
||
static int yyRelMinutes;
|
||
static int yyRelMonth;
|
||
static int yyRelSeconds;
|
||
static int yyRelYear;
|
||
|
||
%}
|
||
|
||
%union {
|
||
int Number;
|
||
enum _MERIDIAN Meridian;
|
||
}
|
||
|
||
%token tAGO tDAY tDAY_UNIT tDAYZONE tDST tHOUR_UNIT tID
|
||
%token tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT
|
||
%token tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE
|
||
|
||
%type <Number> tDAY tDAY_UNIT tDAYZONE tHOUR_UNIT tMINUTE_UNIT
|
||
%type <Number> tMONTH tMONTH_UNIT
|
||
%type <Number> tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE
|
||
%type <Meridian> tMERIDIAN o_merid
|
||
|
||
%%
|
||
|
||
spec : /* NULL */
|
||
| spec item
|
||
;
|
||
|
||
item : time {
|
||
yyHaveTime++;
|
||
}
|
||
| zone {
|
||
yyHaveZone++;
|
||
}
|
||
| date {
|
||
yyHaveDate++;
|
||
}
|
||
| day {
|
||
yyHaveDay++;
|
||
}
|
||
| rel {
|
||
yyHaveRel++;
|
||
}
|
||
| number
|
||
;
|
||
|
||
time : tUNUMBER tMERIDIAN {
|
||
yyHour = $1;
|
||
yyMinutes = 0;
|
||
yySeconds = 0;
|
||
yyMeridian = $2;
|
||
}
|
||
| tUNUMBER ':' tUNUMBER o_merid {
|
||
yyHour = $1;
|
||
yyMinutes = $3;
|
||
yySeconds = 0;
|
||
yyMeridian = $4;
|
||
}
|
||
| tUNUMBER ':' tUNUMBER tSNUMBER {
|
||
yyHour = $1;
|
||
yyMinutes = $3;
|
||
yyMeridian = MER24;
|
||
yyHaveZone++;
|
||
yyTimezone = ($4 < 0
|
||
? -$4 % 100 + (-$4 / 100) * 60
|
||
: - ($4 % 100 + ($4 / 100) * 60));
|
||
}
|
||
| tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid {
|
||
yyHour = $1;
|
||
yyMinutes = $3;
|
||
yySeconds = $5;
|
||
yyMeridian = $6;
|
||
}
|
||
| tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER {
|
||
yyHour = $1;
|
||
yyMinutes = $3;
|
||
yySeconds = $5;
|
||
yyMeridian = MER24;
|
||
yyHaveZone++;
|
||
yyTimezone = ($6 < 0
|
||
? -$6 % 100 + (-$6 / 100) * 60
|
||
: - ($6 % 100 + ($6 / 100) * 60));
|
||
}
|
||
;
|
||
|
||
zone : tZONE {
|
||
yyTimezone = $1;
|
||
}
|
||
| tDAYZONE {
|
||
yyTimezone = $1 - 60;
|
||
}
|
||
|
|
||
tZONE tDST {
|
||
yyTimezone = $1 - 60;
|
||
}
|
||
;
|
||
|
||
day : tDAY {
|
||
yyDayOrdinal = 1;
|
||
yyDayNumber = $1;
|
||
}
|
||
| tDAY ',' {
|
||
yyDayOrdinal = 1;
|
||
yyDayNumber = $1;
|
||
}
|
||
| tUNUMBER tDAY {
|
||
yyDayOrdinal = $1;
|
||
yyDayNumber = $2;
|
||
}
|
||
;
|
||
|
||
date : tUNUMBER '/' tUNUMBER {
|
||
yyMonth = $1;
|
||
yyDay = $3;
|
||
}
|
||
| tUNUMBER '/' tUNUMBER '/' tUNUMBER {
|
||
/* Interpret as YYYY/MM/DD if $1 >= 1000, otherwise as MM/DD/YY.
|
||
The goal in recognizing YYYY/MM/DD is solely to support legacy
|
||
machine-generated dates like those in an RCS log listing. If
|
||
you want portability, use the ISO 8601 format. */
|
||
if ($1 >= 1000)
|
||
{
|
||
yyYear = $1;
|
||
yyMonth = $3;
|
||
yyDay = $5;
|
||
}
|
||
else
|
||
{
|
||
yyMonth = $1;
|
||
yyDay = $3;
|
||
yyYear = $5;
|
||
}
|
||
}
|
||
| tUNUMBER tSNUMBER tSNUMBER {
|
||
/* ISO 8601 format. yyyy-mm-dd. */
|
||
yyYear = $1;
|
||
yyMonth = -$2;
|
||
yyDay = -$3;
|
||
}
|
||
| tUNUMBER tMONTH tSNUMBER {
|
||
/* e.g. 17-JUN-1992. */
|
||
yyDay = $1;
|
||
yyMonth = $2;
|
||
yyYear = -$3;
|
||
}
|
||
| tMONTH tUNUMBER {
|
||
yyMonth = $1;
|
||
yyDay = $2;
|
||
}
|
||
| tMONTH tUNUMBER ',' tUNUMBER {
|
||
yyMonth = $1;
|
||
yyDay = $2;
|
||
yyYear = $4;
|
||
}
|
||
| tUNUMBER tMONTH {
|
||
yyMonth = $2;
|
||
yyDay = $1;
|
||
}
|
||
| tUNUMBER tMONTH tUNUMBER {
|
||
yyMonth = $2;
|
||
yyDay = $1;
|
||
yyYear = $3;
|
||
}
|
||
;
|
||
|
||
rel : relunit tAGO {
|
||
yyRelSeconds = -yyRelSeconds;
|
||
yyRelMinutes = -yyRelMinutes;
|
||
yyRelHour = -yyRelHour;
|
||
yyRelDay = -yyRelDay;
|
||
yyRelMonth = -yyRelMonth;
|
||
yyRelYear = -yyRelYear;
|
||
}
|
||
| relunit
|
||
;
|
||
|
||
relunit : tUNUMBER tYEAR_UNIT {
|
||
yyRelYear += $1 * $2;
|
||
}
|
||
| tSNUMBER tYEAR_UNIT {
|
||
yyRelYear += $1 * $2;
|
||
}
|
||
| tYEAR_UNIT {
|
||
yyRelYear++;
|
||
}
|
||
| tUNUMBER tMONTH_UNIT {
|
||
yyRelMonth += $1 * $2;
|
||
}
|
||
| tSNUMBER tMONTH_UNIT {
|
||
yyRelMonth += $1 * $2;
|
||
}
|
||
| tMONTH_UNIT {
|
||
yyRelMonth++;
|
||
}
|
||
| tUNUMBER tDAY_UNIT {
|
||
yyRelDay += $1 * $2;
|
||
}
|
||
| tSNUMBER tDAY_UNIT {
|
||
yyRelDay += $1 * $2;
|
||
}
|
||
| tDAY_UNIT {
|
||
yyRelDay++;
|
||
}
|
||
| tUNUMBER tHOUR_UNIT {
|
||
yyRelHour += $1 * $2;
|
||
}
|
||
| tSNUMBER tHOUR_UNIT {
|
||
yyRelHour += $1 * $2;
|
||
}
|
||
| tHOUR_UNIT {
|
||
yyRelHour++;
|
||
}
|
||
| tUNUMBER tMINUTE_UNIT {
|
||
yyRelMinutes += $1 * $2;
|
||
}
|
||
| tSNUMBER tMINUTE_UNIT {
|
||
yyRelMinutes += $1 * $2;
|
||
}
|
||
| tMINUTE_UNIT {
|
||
yyRelMinutes++;
|
||
}
|
||
| tUNUMBER tSEC_UNIT {
|
||
yyRelSeconds += $1 * $2;
|
||
}
|
||
| tSNUMBER tSEC_UNIT {
|
||
yyRelSeconds += $1 * $2;
|
||
}
|
||
| tSEC_UNIT {
|
||
yyRelSeconds++;
|
||
}
|
||
;
|
||
|
||
number : tUNUMBER
|
||
{
|
||
if ((yyHaveTime != 0) && (yyHaveDate != 0) && (yyHaveRel == 0))
|
||
yyYear = $1;
|
||
else
|
||
{
|
||
if ($1>10000)
|
||
{
|
||
yyHaveDate++;
|
||
yyDay= ($1)%100;
|
||
yyMonth= ($1/100)%100;
|
||
yyYear = $1/10000;
|
||
}
|
||
else
|
||
{
|
||
yyHaveTime++;
|
||
if ($1 < 100)
|
||
{
|
||
yyHour = $1;
|
||
yyMinutes = 0;
|
||
}
|
||
else
|
||
{
|
||
yyHour = $1 / 100;
|
||
yyMinutes = $1 % 100;
|
||
}
|
||
yySeconds = 0;
|
||
yyMeridian = MER24;
|
||
}
|
||
}
|
||
}
|
||
;
|
||
|
||
o_merid : /* NULL */
|
||
{
|
||
$$ = MER24;
|
||
}
|
||
| tMERIDIAN
|
||
{
|
||
$$ = $1;
|
||
}
|
||
;
|
||
|
||
%%
|
||
|
||
/* Month and day table. */
|
||
static TABLE const MonthDayTable[] = {
|
||
{ "january", tMONTH, 1 },
|
||
{ "february", tMONTH, 2 },
|
||
{ "march", tMONTH, 3 },
|
||
{ "april", tMONTH, 4 },
|
||
{ "may", tMONTH, 5 },
|
||
{ "june", tMONTH, 6 },
|
||
{ "july", tMONTH, 7 },
|
||
{ "august", tMONTH, 8 },
|
||
{ "september", tMONTH, 9 },
|
||
{ "sept", tMONTH, 9 },
|
||
{ "october", tMONTH, 10 },
|
||
{ "november", tMONTH, 11 },
|
||
{ "december", tMONTH, 12 },
|
||
{ "sunday", tDAY, 0 },
|
||
{ "monday", tDAY, 1 },
|
||
{ "tuesday", tDAY, 2 },
|
||
{ "tues", tDAY, 2 },
|
||
{ "wednesday", tDAY, 3 },
|
||
{ "wednes", tDAY, 3 },
|
||
{ "thursday", tDAY, 4 },
|
||
{ "thur", tDAY, 4 },
|
||
{ "thurs", tDAY, 4 },
|
||
{ "friday", tDAY, 5 },
|
||
{ "saturday", tDAY, 6 },
|
||
{ NULL, 0, 0 }
|
||
};
|
||
|
||
/* Time units table. */
|
||
static TABLE const UnitsTable[] = {
|
||
{ "year", tYEAR_UNIT, 1 },
|
||
{ "month", tMONTH_UNIT, 1 },
|
||
{ "fortnight", tDAY_UNIT, 14 },
|
||
{ "week", tDAY_UNIT, 7 },
|
||
{ "day", tDAY_UNIT, 1 },
|
||
{ "hour", tHOUR_UNIT, 1 },
|
||
{ "minute", tMINUTE_UNIT, 1 },
|
||
{ "min", tMINUTE_UNIT, 1 },
|
||
{ "second", tSEC_UNIT, 1 },
|
||
{ "sec", tSEC_UNIT, 1 },
|
||
{ NULL, 0, 0 }
|
||
};
|
||
|
||
/* Assorted relative-time words. */
|
||
static TABLE const OtherTable[] = {
|
||
{ "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 },
|
||
{ "yesterday", tMINUTE_UNIT, -1 * 24 * 60 },
|
||
{ "today", tMINUTE_UNIT, 0 },
|
||
{ "now", tMINUTE_UNIT, 0 },
|
||
{ "last", tUNUMBER, -1 },
|
||
{ "this", tMINUTE_UNIT, 0 },
|
||
{ "next", tUNUMBER, 2 },
|
||
{ "first", tUNUMBER, 1 },
|
||
/* { "second", tUNUMBER, 2 }, */
|
||
{ "third", tUNUMBER, 3 },
|
||
{ "fourth", tUNUMBER, 4 },
|
||
{ "fifth", tUNUMBER, 5 },
|
||
{ "sixth", tUNUMBER, 6 },
|
||
{ "seventh", tUNUMBER, 7 },
|
||
{ "eighth", tUNUMBER, 8 },
|
||
{ "ninth", tUNUMBER, 9 },
|
||
{ "tenth", tUNUMBER, 10 },
|
||
{ "eleventh", tUNUMBER, 11 },
|
||
{ "twelfth", tUNUMBER, 12 },
|
||
{ "ago", tAGO, 1 },
|
||
{ NULL, 0, 0 }
|
||
};
|
||
|
||
/* The timezone table. */
|
||
static TABLE const TimezoneTable[] = {
|
||
{ "gmt", tZONE, HOUR ( 0) }, /* Greenwich Mean */
|
||
{ "ut", tZONE, HOUR ( 0) }, /* Universal (Coordinated) */
|
||
{ "utc", tZONE, HOUR ( 0) },
|
||
{ "wet", tZONE, HOUR ( 0) }, /* Western European */
|
||
{ "bst", tDAYZONE, HOUR ( 0) }, /* British Summer */
|
||
{ "wat", tZONE, HOUR ( 1) }, /* West Africa */
|
||
{ "at", tZONE, HOUR ( 2) }, /* Azores */
|
||
{ "ast", tZONE, HOUR ( 4) }, /* Atlantic Standard */
|
||
{ "adt", tDAYZONE, HOUR ( 4) }, /* Atlantic Daylight */
|
||
{ "est", tZONE, HOUR ( 5) }, /* Eastern Standard */
|
||
{ "edt", tDAYZONE, HOUR ( 5) }, /* Eastern Daylight */
|
||
{ "cst", tZONE, HOUR ( 6) }, /* Central Standard */
|
||
{ "cdt", tDAYZONE, HOUR ( 6) }, /* Central Daylight */
|
||
{ "mst", tZONE, HOUR ( 7) }, /* Mountain Standard */
|
||
{ "mdt", tDAYZONE, HOUR ( 7) }, /* Mountain Daylight */
|
||
{ "pst", tZONE, HOUR ( 8) }, /* Pacific Standard */
|
||
{ "pdt", tDAYZONE, HOUR ( 8) }, /* Pacific Daylight */
|
||
{ "yst", tZONE, HOUR ( 9) }, /* Yukon Standard */
|
||
{ "ydt", tDAYZONE, HOUR ( 9) }, /* Yukon Daylight */
|
||
{ "hst", tZONE, HOUR (10) }, /* Hawaii Standard */
|
||
{ "hdt", tDAYZONE, HOUR (10) }, /* Hawaii Daylight */
|
||
{ "cat", tZONE, HOUR (10) }, /* Central Alaska */
|
||
{ "ahst", tZONE, HOUR (10) }, /* Alaska-Hawaii Standard */
|
||
{ "nt", tZONE, HOUR (11) }, /* Nome */
|
||
{ "idlw", tZONE, HOUR (12) }, /* International Date Line West */
|
||
{ "cet", tZONE, -HOUR (1) }, /* Central European */
|
||
{ "met", tZONE, -HOUR (1) }, /* Middle European */
|
||
{ "mewt", tZONE, -HOUR (1) }, /* Middle European Winter */
|
||
{ "mest", tDAYZONE, -HOUR (1) }, /* Middle European Summer */
|
||
{ "mesz", tDAYZONE, -HOUR (1) }, /* Middle European Summer */
|
||
{ "swt", tZONE, -HOUR (1) }, /* Swedish Winter */
|
||
{ "sst", tDAYZONE, -HOUR (1) }, /* Swedish Summer */
|
||
{ "fwt", tZONE, -HOUR (1) }, /* French Winter */
|
||
{ "fst", tDAYZONE, -HOUR (1) }, /* French Summer */
|
||
{ "eet", tZONE, -HOUR (2) }, /* Eastern Europe, USSR Zone 1 */
|
||
{ "bt", tZONE, -HOUR (3) }, /* Baghdad, USSR Zone 2 */
|
||
{ "zp4", tZONE, -HOUR (4) }, /* USSR Zone 3 */
|
||
{ "zp5", tZONE, -HOUR (5) }, /* USSR Zone 4 */
|
||
{ "zp6", tZONE, -HOUR (6) }, /* USSR Zone 5 */
|
||
{ "wast", tZONE, -HOUR (7) }, /* West Australian Standard */
|
||
{ "wadt", tDAYZONE, -HOUR (7) }, /* West Australian Daylight */
|
||
{ "cct", tZONE, -HOUR (8) }, /* China Coast, USSR Zone 7 */
|
||
{ "jst", tZONE, -HOUR (9) }, /* Japan Standard, USSR Zone 8 */
|
||
{ "east", tZONE, -HOUR (10) }, /* Eastern Australian Standard */
|
||
{ "eadt", tDAYZONE, -HOUR (10) }, /* Eastern Australian Daylight */
|
||
{ "gst", tZONE, -HOUR (10) }, /* Guam Standard, USSR Zone 9 */
|
||
{ "nzt", tZONE, -HOUR (12) }, /* New Zealand */
|
||
{ "nzst", tZONE, -HOUR (12) }, /* New Zealand Standard */
|
||
{ "nzdt", tDAYZONE, -HOUR (12) }, /* New Zealand Daylight */
|
||
{ "idle", tZONE, -HOUR (12) }, /* International Date Line East */
|
||
{ NULL, 0, 0 }
|
||
};
|
||
|
||
/* Military timezone table. */
|
||
static TABLE const MilitaryTable[] = {
|
||
{ "a", tZONE, HOUR ( 1) },
|
||
{ "b", tZONE, HOUR ( 2) },
|
||
{ "c", tZONE, HOUR ( 3) },
|
||
{ "d", tZONE, HOUR ( 4) },
|
||
{ "e", tZONE, HOUR ( 5) },
|
||
{ "f", tZONE, HOUR ( 6) },
|
||
{ "g", tZONE, HOUR ( 7) },
|
||
{ "h", tZONE, HOUR ( 8) },
|
||
{ "i", tZONE, HOUR ( 9) },
|
||
{ "k", tZONE, HOUR ( 10) },
|
||
{ "l", tZONE, HOUR ( 11) },
|
||
{ "m", tZONE, HOUR ( 12) },
|
||
{ "n", tZONE, HOUR (- 1) },
|
||
{ "o", tZONE, HOUR (- 2) },
|
||
{ "p", tZONE, HOUR (- 3) },
|
||
{ "q", tZONE, HOUR (- 4) },
|
||
{ "r", tZONE, HOUR (- 5) },
|
||
{ "s", tZONE, HOUR (- 6) },
|
||
{ "t", tZONE, HOUR (- 7) },
|
||
{ "u", tZONE, HOUR (- 8) },
|
||
{ "v", tZONE, HOUR (- 9) },
|
||
{ "w", tZONE, HOUR (-10) },
|
||
{ "x", tZONE, HOUR (-11) },
|
||
{ "y", tZONE, HOUR (-12) },
|
||
{ "z", tZONE, HOUR ( 0) },
|
||
{ NULL, 0, 0 }
|
||
};
|
||
|
||
|
||
|
||
|
||
static int yyerror (unused const char *s)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
static int ToHour (int Hours, MERIDIAN Meridian)
|
||
{
|
||
switch (Meridian)
|
||
{
|
||
case MER24:
|
||
if (Hours < 0 || Hours > 23)
|
||
return -1;
|
||
return Hours;
|
||
case MERam:
|
||
if (Hours < 1 || Hours > 12)
|
||
return -1;
|
||
if (Hours == 12)
|
||
Hours = 0;
|
||
return Hours;
|
||
case MERpm:
|
||
if (Hours < 1 || Hours > 12)
|
||
return -1;
|
||
if (Hours == 12)
|
||
Hours = 0;
|
||
return Hours + 12;
|
||
default:
|
||
abort ();
|
||
}
|
||
/* NOTREACHED */
|
||
}
|
||
|
||
static int ToYear (int Year)
|
||
{
|
||
if (Year < 0)
|
||
Year = -Year;
|
||
|
||
/* XPG4 suggests that years 00-68 map to 2000-2068, and
|
||
years 69-99 map to 1969-1999. */
|
||
if (Year < 69)
|
||
Year += 2000;
|
||
else if (Year < 100)
|
||
Year += 1900;
|
||
|
||
return Year;
|
||
}
|
||
|
||
static int LookupWord (char *buff)
|
||
{
|
||
register char *p;
|
||
register char *q;
|
||
register const TABLE *tp;
|
||
int i;
|
||
bool abbrev;
|
||
|
||
/* Make it lowercase. */
|
||
for (p = buff; '\0' != *p; p++)
|
||
if (isupper (*p))
|
||
*p = tolower (*p);
|
||
|
||
if (strcmp (buff, "am") == 0 || strcmp (buff, "a.m.") == 0)
|
||
{
|
||
yylval.Meridian = MERam;
|
||
return tMERIDIAN;
|
||
}
|
||
if (strcmp (buff, "pm") == 0 || strcmp (buff, "p.m.") == 0)
|
||
{
|
||
yylval.Meridian = MERpm;
|
||
return tMERIDIAN;
|
||
}
|
||
|
||
/* See if we have an abbreviation for a month. */
|
||
if (strlen (buff) == 3)
|
||
abbrev = true;
|
||
else if (strlen (buff) == 4 && buff[3] == '.')
|
||
{
|
||
abbrev = true;
|
||
buff[3] = '\0';
|
||
}
|
||
else
|
||
abbrev = false;
|
||
|
||
for (tp = MonthDayTable; tp->name; tp++)
|
||
{
|
||
if (abbrev)
|
||
{
|
||
if (strncmp (buff, tp->name, 3) == 0)
|
||
{
|
||
yylval.Number = tp->value;
|
||
return tp->type;
|
||
}
|
||
}
|
||
else if (strcmp (buff, tp->name) == 0)
|
||
{
|
||
yylval.Number = tp->value;
|
||
return tp->type;
|
||
}
|
||
}
|
||
|
||
for (tp = TimezoneTable; tp->name; tp++)
|
||
if (strcmp (buff, tp->name) == 0)
|
||
{
|
||
yylval.Number = tp->value;
|
||
return tp->type;
|
||
}
|
||
|
||
if (strcmp (buff, "dst") == 0)
|
||
return tDST;
|
||
|
||
for (tp = UnitsTable; tp->name; tp++)
|
||
if (strcmp (buff, tp->name) == 0)
|
||
{
|
||
yylval.Number = tp->value;
|
||
return tp->type;
|
||
}
|
||
|
||
/* Strip off any plural and try the units table again. */
|
||
i = strlen (buff) - 1;
|
||
if (buff[i] == 's')
|
||
{
|
||
buff[i] = '\0';
|
||
for (tp = UnitsTable; tp->name; tp++)
|
||
if (strcmp (buff, tp->name) == 0)
|
||
{
|
||
yylval.Number = tp->value;
|
||
return tp->type;
|
||
}
|
||
buff[i] = 's'; /* Put back for "this" in OtherTable. */
|
||
}
|
||
|
||
for (tp = OtherTable; tp->name; tp++)
|
||
if (strcmp (buff, tp->name) == 0)
|
||
{
|
||
yylval.Number = tp->value;
|
||
return tp->type;
|
||
}
|
||
|
||
/* Military timezones. */
|
||
if (buff[1] == '\0' && isalpha (*buff))
|
||
{
|
||
for (tp = MilitaryTable; tp->name; tp++)
|
||
if (strcmp (buff, tp->name) == 0)
|
||
{
|
||
yylval.Number = tp->value;
|
||
return tp->type;
|
||
}
|
||
}
|
||
|
||
/* Drop out any periods and try the timezone table again. */
|
||
for (i = 0, p = q = buff; '\0' != *q; q++)
|
||
if (*q != '.')
|
||
*p++ = *q;
|
||
else
|
||
i++;
|
||
*p = '\0';
|
||
if (0 != i)
|
||
for (tp = TimezoneTable; NULL != tp->name; tp++)
|
||
if (strcmp (buff, tp->name) == 0)
|
||
{
|
||
yylval.Number = tp->value;
|
||
return tp->type;
|
||
}
|
||
|
||
return tID;
|
||
}
|
||
|
||
static int
|
||
yylex (void)
|
||
{
|
||
register char c;
|
||
register char *p;
|
||
char buff[20];
|
||
int Count;
|
||
int sign;
|
||
|
||
for (;;)
|
||
{
|
||
while (isspace (*yyInput))
|
||
yyInput++;
|
||
|
||
if (ISDIGIT (c = *yyInput) || c == '-' || c == '+')
|
||
{
|
||
if (c == '-' || c == '+')
|
||
{
|
||
sign = c == '-' ? -1 : 1;
|
||
if (!ISDIGIT (*++yyInput))
|
||
/* skip the '-' sign */
|
||
continue;
|
||
}
|
||
else
|
||
sign = 0;
|
||
for (yylval.Number = 0; ISDIGIT (c = *yyInput++);)
|
||
yylval.Number = 10 * yylval.Number + c - '0';
|
||
yyInput--;
|
||
if (sign < 0)
|
||
yylval.Number = -yylval.Number;
|
||
return (0 != sign) ? tSNUMBER : tUNUMBER;
|
||
}
|
||
if (isalpha (c))
|
||
{
|
||
for (p = buff; (c = *yyInput++, isalpha (c)) || c == '.';)
|
||
if (p < &buff[sizeof buff - 1])
|
||
*p++ = c;
|
||
*p = '\0';
|
||
yyInput--;
|
||
return LookupWord (buff);
|
||
}
|
||
if (c != '(')
|
||
return *yyInput++;
|
||
Count = 0;
|
||
do
|
||
{
|
||
c = *yyInput++;
|
||
if (c == '\0')
|
||
return c;
|
||
if (c == '(')
|
||
Count++;
|
||
else if (c == ')')
|
||
Count--;
|
||
}
|
||
while (Count > 0);
|
||
}
|
||
}
|
||
|
||
#define TM_YEAR_ORIGIN 1900
|
||
|
||
/* Yield A - B, measured in seconds. */
|
||
static long difftm (struct tm *a, struct tm *b)
|
||
{
|
||
int ay = a->tm_year + (TM_YEAR_ORIGIN - 1);
|
||
int by = b->tm_year + (TM_YEAR_ORIGIN - 1);
|
||
long days = (
|
||
/* difference in day of year */
|
||
a->tm_yday - b->tm_yday
|
||
/* + intervening leap days */
|
||
+ ((ay >> 2) - (by >> 2))
|
||
- (ay / 100 - by / 100)
|
||
+ ((ay / 100 >> 2) - (by / 100 >> 2))
|
||
/* + difference in years * 365 */
|
||
+ (long) (ay - by) * 365
|
||
);
|
||
return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
|
||
+ (a->tm_min - b->tm_min))
|
||
+ (a->tm_sec - b->tm_sec));
|
||
}
|
||
|
||
time_t get_date (const char *p, const time_t *now)
|
||
{
|
||
struct tm tm, tm0, *tmp;
|
||
time_t Start;
|
||
|
||
yyInput = p;
|
||
Start = now ? *now : time ((time_t *) NULL);
|
||
tmp = localtime (&Start);
|
||
yyYear = tmp->tm_year + TM_YEAR_ORIGIN;
|
||
yyMonth = tmp->tm_mon + 1;
|
||
yyDay = tmp->tm_mday;
|
||
yyHour = tmp->tm_hour;
|
||
yyMinutes = tmp->tm_min;
|
||
yySeconds = tmp->tm_sec;
|
||
yyMeridian = MER24;
|
||
yyRelSeconds = 0;
|
||
yyRelMinutes = 0;
|
||
yyRelHour = 0;
|
||
yyRelDay = 0;
|
||
yyRelMonth = 0;
|
||
yyRelYear = 0;
|
||
yyHaveDate = 0;
|
||
yyHaveDay = 0;
|
||
yyHaveRel = 0;
|
||
yyHaveTime = 0;
|
||
yyHaveZone = 0;
|
||
|
||
if (yyparse ()
|
||
|| yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1)
|
||
return -1;
|
||
|
||
tm.tm_year = ToYear (yyYear) - TM_YEAR_ORIGIN + yyRelYear;
|
||
tm.tm_mon = yyMonth - 1 + yyRelMonth;
|
||
tm.tm_mday = yyDay + yyRelDay;
|
||
if ((yyHaveTime != 0) ||
|
||
( (yyHaveRel != 0) && (yyHaveDate == 0) && (yyHaveDay == 0) ))
|
||
{
|
||
tm.tm_hour = ToHour (yyHour, yyMeridian);
|
||
if (tm.tm_hour < 0)
|
||
return -1;
|
||
tm.tm_min = yyMinutes;
|
||
tm.tm_sec = yySeconds;
|
||
}
|
||
else
|
||
{
|
||
tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
|
||
}
|
||
tm.tm_hour += yyRelHour;
|
||
tm.tm_min += yyRelMinutes;
|
||
tm.tm_sec += yyRelSeconds;
|
||
tm.tm_isdst = -1;
|
||
tm0 = tm;
|
||
|
||
Start = mktime (&tm);
|
||
|
||
if (Start == (time_t) -1)
|
||
{
|
||
|
||
/* Guard against falsely reporting errors near the time_t boundaries
|
||
when parsing times in other time zones. For example, if the min
|
||
time_t value is 1970-01-01 00:00:00 UTC and we are 8 hours ahead
|
||
of UTC, then the min localtime value is 1970-01-01 08:00:00; if
|
||
we apply mktime to 1970-01-01 00:00:00 we will get an error, so
|
||
we apply mktime to 1970-01-02 08:00:00 instead and adjust the time
|
||
zone by 24 hours to compensate. This algorithm assumes that
|
||
there is no DST transition within a day of the time_t boundaries. */
|
||
if (yyHaveZone)
|
||
{
|
||
tm = tm0;
|
||
if (tm.tm_year <= EPOCH - TM_YEAR_ORIGIN)
|
||
{
|
||
tm.tm_mday++;
|
||
yyTimezone -= 24 * 60;
|
||
}
|
||
else
|
||
{
|
||
tm.tm_mday--;
|
||
yyTimezone += 24 * 60;
|
||
}
|
||
Start = mktime (&tm);
|
||
}
|
||
|
||
if (Start == (time_t) -1)
|
||
return Start;
|
||
}
|
||
|
||
if (yyHaveDay && !yyHaveDate)
|
||
{
|
||
tm.tm_mday += ((yyDayNumber - tm.tm_wday + 7) % 7
|
||
+ 7 * (yyDayOrdinal - (0 < yyDayOrdinal)));
|
||
Start = mktime (&tm);
|
||
if (Start == (time_t) -1)
|
||
return Start;
|
||
}
|
||
|
||
if (yyHaveZone)
|
||
{
|
||
long delta = yyTimezone * 60L + difftm (&tm, gmtime (&Start));
|
||
if ((Start + delta < Start) != (delta < 0))
|
||
return -1; /* time_t overflow */
|
||
Start += delta;
|
||
}
|
||
|
||
return Start;
|
||
}
|
||
|
||
#if defined (TEST)
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
main (ac, av)
|
||
int ac;
|
||
char *av[];
|
||
{
|
||
char buff[MAX_BUFF_LEN + 1];
|
||
time_t d;
|
||
|
||
(void) printf ("Enter date, or blank line to exit.\n\t> ");
|
||
(void) fflush (stdout);
|
||
|
||
buff[MAX_BUFF_LEN] = 0;
|
||
while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0])
|
||
{
|
||
d = get_date (buff, (time_t *) NULL);
|
||
if (d == -1)
|
||
(void) printf ("Bad format - couldn't convert.\n");
|
||
else
|
||
(void) printf ("%s", ctime (&d));
|
||
(void) printf ("\t> ");
|
||
(void) fflush (stdout);
|
||
}
|
||
exit (0);
|
||
/* NOTREACHED */
|
||
}
|
||
#endif /* defined (TEST) */
|