--- /dev/null
+
+/* A Bison parser, made from parsedate.y with Bison version GNU Bison version 1.22
+ */
+
+#define YYBISON 1 /* Identify Bison output. */
+
+#define tDAY 258
+#define tDAYZONE 259
+#define tMERIDIAN 260
+#define tMONTH 261
+#define tMONTH_UNIT 262
+#define tSEC_UNIT 263
+#define tSNUMBER 264
+#define tUNUMBER 265
+#define tZONE 266
+
+#line 1 "parsedate.y"
+
+/* $Revision$
+**
+** 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@osf.org> and Jim Berets <jberets@bbn.com> in August, 1990.
+** Further revised (removed obsolete constructs and cleaned up timezone
+** names) in August, 1991, by Rich. Paul Eggert <eggert@twinsun.com>
+** helped in September, 1992.
+**
+** This grammar has six shift/reduce conflicts.
+**
+** This code is in the public domain and has no copyright.
+*/
+/* SUPPRESS 530 *//* Empty body for statement */
+/* SUPPRESS 593 on yyerrlab *//* Label was not used */
+/* SUPPRESS 593 on yynewstate *//* Label was not used */
+/* SUPPRESS 595 on yypvt *//* Automatic variable may be used before set */
+#include <stdio.h>
+#include <sys/types.h>
+#include <ctype.h>
+#include <time.h>
+
+int date_lex();
+
+#define yyparse date_parse
+#define yylex date_lex
+#define yyerror date_error
+
+
+ /* See the LeapYears table in Convert. */
+#define EPOCH 1970
+#define END_OF_TIME 2038
+ /* Constants for general time calculations. */
+#define DST_OFFSET 1
+#define SECSPERDAY (24L * 60L * 60L)
+ /* Readability for TABLE stuff. */
+#define HOUR(x) (x * 60)
+
+#define LPAREN '('
+#define RPAREN ')'
+#define IS7BIT(x) ((unsigned int)(x) < 0200)
+
+#define SIZEOF(array) ((int)(sizeof array / sizeof array[0]))
+#define ENDOF(array) (&array[SIZEOF(array)])
+
+
+/*
+** An entry in the lexical lookup table.
+*/
+typedef struct _TABLE {
+ char *name;
+ int type;
+ time_t value;
+} TABLE;
+
+/*
+** Daylight-savings mode: on, off, or not yet known.
+*/
+typedef enum _DSTMODE {
+ DSTon, DSToff, DSTmaybe
+} DSTMODE;
+
+/*
+** Meridian: am, pm, or 24-hour style.
+*/
+typedef enum _MERIDIAN {
+ MERam, MERpm, MER24
+} MERIDIAN;
+
+
+/*
+** Global variables. We could get rid of most of them by using a yacc
+** union, but this is more efficient. (This routine predates the
+** yacc %union construct.)
+*/
+static char *yyInput;
+static DSTMODE yyDSTmode;
+static int yyHaveDate;
+static int yyHaveRel;
+static int yyHaveTime;
+static time_t yyTimezone;
+static time_t yyDay;
+static time_t yyHour;
+static time_t yyMinutes;
+static time_t yyMonth;
+static time_t yySeconds;
+static time_t yyYear;
+static MERIDIAN yyMeridian;
+static time_t yyRelMonth;
+static time_t yyRelSeconds;
+
+
+extern struct tm *localtime();
+
+static void date_error();
+
+#line 100 "parsedate.y"
+typedef union {
+ time_t Number;
+ enum _MERIDIAN Meridian;
+} YYSTYPE;
+
+#ifndef YYLTYPE
+typedef
+ struct yyltype
+ {
+ int timestamp;
+ int first_line;
+ int first_column;
+ int last_line;
+ int last_column;
+ char *text;
+ }
+ yyltype;
+
+#define YYLTYPE yyltype
+#endif
+
+#include <stdio.h>
+
+#ifndef __cplusplus
+#ifndef __STDC__
+#define const
+#endif
+#endif
+
+
+
+#define YYFINAL 44
+#define YYFLAG -32768
+#define YYNTBASE 15
+
+#define YYTRANSLATE(x) ((unsigned)(x) <= 266 ? yytranslate[x] : 23)
+
+static const char yytranslate[] = { 0,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 14, 2, 2, 13, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 12, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 1, 2, 3, 4, 5,
+ 6, 7, 8, 9, 10, 11
+};
+
+#if YYDEBUG != 0
+static const short yyprhs[] = { 0,
+ 0, 1, 4, 6, 9, 11, 13, 16, 21, 26,
+ 33, 40, 42, 44, 47, 49, 51, 55, 61, 64,
+ 69, 72, 76, 82, 85, 88, 91, 94, 95
+};
+
+static const short yyrhs[] = { -1,
+ 15, 16, 0, 17, 0, 17, 18, 0, 20, 0,
+ 21, 0, 10, 22, 0, 10, 12, 10, 22, 0,
+ 10, 12, 10, 19, 0, 10, 12, 10, 12, 10,
+ 22, 0, 10, 12, 10, 12, 10, 19, 0, 11,
+ 0, 4, 0, 11, 19, 0, 19, 0, 9, 0,
+ 10, 13, 10, 0, 10, 13, 10, 13, 10, 0,
+ 6, 10, 0, 6, 10, 14, 10, 0, 10, 6,
+ 0, 10, 6, 10, 0, 3, 14, 10, 6, 10,
+ 0, 9, 8, 0, 10, 8, 0, 9, 7, 0,
+ 10, 7, 0, 0, 5, 0
+};
+
+#endif
+
+#if YYDEBUG != 0
+static const short yyrline[] = { 0,
+ 114, 115, 118, 127, 131, 134, 139, 151, 157, 164,
+ 170, 180, 184, 188, 196, 202, 223, 227, 239, 243,
+ 248, 252, 257, 264, 267, 270, 273, 278, 281
+};
+
+static const char * const yytname[] = { "$","error","$illegal.","tDAY","tDAYZONE",
+"tMERIDIAN","tMONTH","tMONTH_UNIT","tSEC_UNIT","tSNUMBER","tUNUMBER","tZONE",
+"':'","'/'","','","spec","item","time","zone","numzone","date","rel","o_merid",
+""
+};
+#endif
+
+static const short yyr1[] = { 0,
+ 15, 15, 16, 16, 16, 16, 17, 17, 17, 17,
+ 17, 18, 18, 18, 18, 19, 20, 20, 20, 20,
+ 20, 20, 20, 21, 21, 21, 21, 22, 22
+};
+
+static const short yyr2[] = { 0,
+ 0, 2, 1, 2, 1, 1, 2, 4, 4, 6,
+ 6, 1, 1, 2, 1, 1, 3, 5, 2, 4,
+ 2, 3, 5, 2, 2, 2, 2, 0, 1
+};
+
+static const short yydefact[] = { 1,
+ 0, 0, 0, 0, 28, 2, 3, 5, 6, 0,
+ 19, 26, 24, 29, 21, 27, 25, 0, 0, 7,
+ 13, 16, 12, 4, 15, 0, 0, 22, 28, 17,
+ 14, 0, 20, 0, 9, 8, 0, 23, 28, 18,
+ 11, 10, 0, 0
+};
+
+static const short yydefgoto[] = { 1,
+ 6, 7, 24, 25, 8, 9, 20
+};
+
+static const short yypact[] = {-32768,
+ 1, -11, 11, 20, 12,-32768, 4,-32768,-32768, 13,
+ 16,-32768,-32768,-32768, 21,-32768,-32768, 22, 23,-32768,
+-32768,-32768, 5,-32768,-32768, 28, 25,-32768, 17, 24,
+-32768, 26,-32768, 29,-32768,-32768, 30,-32768, 0,-32768,
+-32768,-32768, 38,-32768
+};
+
+static const short yypgoto[] = {-32768,
+-32768,-32768,-32768, -23,-32768,-32768, -27
+};
+
+
+#define YYLAST 40
+
+
+static const short yytable[] = { 31,
+ 43, 36, 10, 2, 14, 35, 3, 21, 22, 4,
+ 5, 42, 22, 22, 23, 41, 14, 15, 16, 17,
+ 11, 14, 26, 18, 19, 22, 12, 13, 34, 27,
+ 28, 29, 30, 32, 33, 38, 37, 44, 39, 40
+};
+
+static const short yycheck[] = { 23,
+ 0, 29, 14, 3, 5, 29, 6, 4, 9, 9,
+ 10, 39, 9, 9, 11, 39, 5, 6, 7, 8,
+ 10, 5, 10, 12, 13, 9, 7, 8, 12, 14,
+ 10, 10, 10, 6, 10, 10, 13, 0, 10, 10
+};
+/* -*-C-*- Note some compilers choke on comments on `#line' lines. */
+#line 3 "/usr/lib/bison.simple"
+
+/* Skeleton output parser for bison,
+ Copyright (C) 1984, 1989, 1990 Bob Corbett and Richard Stallman
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 1, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+
+#ifndef alloca
+#ifdef __GNUC__
+#define alloca __builtin_alloca
+#else /* not GNU C. */
+#if (!defined (__STDC__) && defined (sparc)) || defined (__sparc__) || defined (__sparc) || defined (__sgi)
+#include <alloca.h>
+#else /* not sparc */
+#if defined (MSDOS) && !defined (__TURBOC__)
+#include <malloc.h>
+#else /* not MSDOS, or __TURBOC__ */
+#if defined(_AIX)
+#include <malloc.h>
+ #pragma alloca
+#else /* not MSDOS, __TURBOC__, or _AIX */
+#ifdef __hpux
+#ifdef __cplusplus
+extern "C" {
+void *alloca (unsigned int);
+};
+#else /* not __cplusplus */
+void *alloca ();
+#endif /* not __cplusplus */
+#endif /* __hpux */
+#endif /* not _AIX */
+#endif /* not MSDOS, or __TURBOC__ */
+#endif /* not sparc. */
+#endif /* not GNU C. */
+#endif /* alloca not defined. */
+
+/* This is the parser code that is written into each bison parser
+ when the %semantic_parser declaration is not specified in the grammar.
+ It was written by Richard Stallman by simplifying the hairy parser
+ used when %semantic_parser is specified. */
+
+/* Note: there must be only one dollar sign in this file.
+ It is replaced by the list of actions, each action
+ as one case of the switch. */
+
+#define yyerrok (yyerrstatus = 0)
+#define yyclearin (yychar = YYEMPTY)
+#define YYEMPTY -2
+#define YYEOF 0
+#define YYACCEPT return(0)
+#define YYABORT return(1)
+#define YYERROR goto yyerrlab1
+/* Like YYERROR except do call yyerror.
+ This remains here temporarily to ease the
+ transition to the new meaning of YYERROR, for GCC.
+ Once GCC version 2 has supplanted version 1, this can go. */
+#define YYFAIL goto yyerrlab
+#define YYRECOVERING() (!!yyerrstatus)
+#define YYBACKUP(token, value) \
+do \
+ if (yychar == YYEMPTY && yylen == 1) \
+ { yychar = (token), yylval = (value); \
+ yychar1 = YYTRANSLATE (yychar); \
+ YYPOPSTACK; \
+ goto yybackup; \
+ } \
+ else \
+ { yyerror ("syntax error: cannot back up"); YYERROR; } \
+while (0)
+
+#define YYTERROR 1
+#define YYERRCODE 256
+
+#ifndef YYPURE
+#define YYLEX yylex()
+#endif
+
+#ifdef YYPURE
+#ifdef YYLSP_NEEDED
+#define YYLEX yylex(&yylval, &yylloc)
+#else
+#define YYLEX yylex(&yylval)
+#endif
+#endif
+
+/* If nonreentrant, generate the variables here */
+
+#ifndef YYPURE
+
+int yychar; /* the lookahead symbol */
+YYSTYPE yylval; /* the semantic value of the */
+ /* lookahead symbol */
+
+#ifdef YYLSP_NEEDED
+YYLTYPE yylloc; /* location data for the lookahead */
+ /* symbol */
+#endif
+
+int yynerrs; /* number of parse errors so far */
+#endif /* not YYPURE */
+
+#if YYDEBUG != 0
+int yydebug; /* nonzero means print parse trace */
+/* Since this is uninitialized, it does not stop multiple parsers
+ from coexisting. */
+#endif
+
+/* YYINITDEPTH indicates the initial size of the parser's stacks */
+
+#ifndef YYINITDEPTH
+#define YYINITDEPTH 200
+#endif
+
+/* YYMAXDEPTH is the maximum size the stacks can grow to
+ (effective only if the built-in stack extension method is used). */
+
+#if YYMAXDEPTH == 0
+#undef YYMAXDEPTH
+#endif
+
+#ifndef YYMAXDEPTH
+#define YYMAXDEPTH 10000
+#endif
+
+/* Prevent warning if -Wstrict-prototypes. */
+#ifdef __GNUC__
+int yyparse (void);
+#endif
+\f
+#if __GNUC__ > 1 /* GNU C and GNU C++ define this. */
+#define __yy_bcopy(FROM,TO,COUNT) __builtin_memcpy(TO,FROM,COUNT)
+#else /* not GNU C or C++ */
+#ifndef __cplusplus
+
+/* This is the most reliable way to avoid incompatibilities
+ in available built-in functions on various systems. */
+static void
+__yy_bcopy (from, to, count)
+ char *from;
+ char *to;
+ int count;
+{
+ register char *f = from;
+ register char *t = to;
+ register int i = count;
+
+ while (i-- > 0)
+ *t++ = *f++;
+}
+
+#else /* __cplusplus */
+
+/* This is the most reliable way to avoid incompatibilities
+ in available built-in functions on various systems. */
+static void
+__yy_bcopy (char *from, char *to, int count)
+{
+ register char *f = from;
+ register char *t = to;
+ register int i = count;
+
+ while (i-- > 0)
+ *t++ = *f++;
+}
+
+#endif
+#endif
+\f
+#line 184 "/usr/lib/bison.simple"
+int
+yyparse()
+{
+ register int yystate;
+ register int yyn;
+ register short *yyssp;
+ register YYSTYPE *yyvsp;
+ int yyerrstatus; /* number of tokens to shift before error messages enabled */
+ int yychar1 = 0; /* lookahead token as an internal (translated) token number */
+
+ short yyssa[YYINITDEPTH]; /* the state stack */
+ YYSTYPE yyvsa[YYINITDEPTH]; /* the semantic value stack */
+
+ short *yyss = yyssa; /* refer to the stacks thru separate pointers */
+ YYSTYPE *yyvs = yyvsa; /* to allow yyoverflow to reallocate them elsewhere */
+
+#ifdef YYLSP_NEEDED
+ YYLTYPE yylsa[YYINITDEPTH]; /* the location stack */
+ YYLTYPE *yyls = yylsa;
+ YYLTYPE *yylsp;
+
+#define YYPOPSTACK (yyvsp--, yyssp--, yylsp--)
+#else
+#define YYPOPSTACK (yyvsp--, yyssp--)
+#endif
+
+ int yystacksize = YYINITDEPTH;
+
+#ifdef YYPURE
+ int yychar;
+ YYSTYPE yylval;
+ int yynerrs;
+#ifdef YYLSP_NEEDED
+ YYLTYPE yylloc;
+#endif
+#endif
+
+ YYSTYPE yyval; /* the variable used to return */
+ /* semantic values from the action */
+ /* routines */
+
+ int yylen;
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Starting parse\n");
+#endif
+
+ yystate = 0;
+ yyerrstatus = 0;
+ yynerrs = 0;
+ yychar = YYEMPTY; /* Cause a token to be read. */
+
+ /* Initialize stack pointers.
+ Waste one element of value and location stack
+ so that they stay on the same level as the state stack.
+ The wasted elements are never initialized. */
+
+ yyssp = yyss - 1;
+ yyvsp = yyvs;
+#ifdef YYLSP_NEEDED
+ yylsp = yyls;
+#endif
+
+/* Push a new state, which is found in yystate . */
+/* In all cases, when you get here, the value and location stacks
+ have just been pushed. so pushing a state here evens the stacks. */
+yynewstate:
+
+ *++yyssp = yystate;
+
+ if (yyssp >= yyss + yystacksize - 1)
+ {
+ /* Give user a chance to reallocate the stack */
+ /* Use copies of these so that the &'s don't force the real ones into memory. */
+ YYSTYPE *yyvs1 = yyvs;
+ short *yyss1 = yyss;
+#ifdef YYLSP_NEEDED
+ YYLTYPE *yyls1 = yyls;
+#endif
+
+ /* Get the current used size of the three stacks, in elements. */
+ int size = yyssp - yyss + 1;
+
+#ifdef yyoverflow
+ /* Each stack pointer address is followed by the size of
+ the data in use in that stack, in bytes. */
+#ifdef YYLSP_NEEDED
+ /* This used to be a conditional around just the two extra args,
+ but that might be undefined if yyoverflow is a macro. */
+ yyoverflow("parser stack overflow",
+ &yyss1, size * sizeof (*yyssp),
+ &yyvs1, size * sizeof (*yyvsp),
+ &yyls1, size * sizeof (*yylsp),
+ &yystacksize);
+#else
+ yyoverflow("parser stack overflow",
+ &yyss1, size * sizeof (*yyssp),
+ &yyvs1, size * sizeof (*yyvsp),
+ &yystacksize);
+#endif
+
+ yyss = yyss1; yyvs = yyvs1;
+#ifdef YYLSP_NEEDED
+ yyls = yyls1;
+#endif
+#else /* no yyoverflow */
+ /* Extend the stack our own way. */
+ if (yystacksize >= YYMAXDEPTH)
+ {
+ yyerror("parser stack overflow");
+ return 2;
+ }
+ yystacksize *= 2;
+ if (yystacksize > YYMAXDEPTH)
+ yystacksize = YYMAXDEPTH;
+ yyss = (short *) alloca (yystacksize * sizeof (*yyssp));
+ __yy_bcopy ((char *)yyss1, (char *)yyss, size * sizeof (*yyssp));
+ yyvs = (YYSTYPE *) alloca (yystacksize * sizeof (*yyvsp));
+ __yy_bcopy ((char *)yyvs1, (char *)yyvs, size * sizeof (*yyvsp));
+#ifdef YYLSP_NEEDED
+ yyls = (YYLTYPE *) alloca (yystacksize * sizeof (*yylsp));
+ __yy_bcopy ((char *)yyls1, (char *)yyls, size * sizeof (*yylsp));
+#endif
+#endif /* no yyoverflow */
+
+ yyssp = yyss + size - 1;
+ yyvsp = yyvs + size - 1;
+#ifdef YYLSP_NEEDED
+ yylsp = yyls + size - 1;
+#endif
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Stack size increased to %d\n", yystacksize);
+#endif
+
+ if (yyssp >= yyss + yystacksize - 1)
+ YYABORT;
+ }
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Entering state %d\n", yystate);
+#endif
+
+ goto yybackup;
+ yybackup:
+
+/* Do appropriate processing given the current state. */
+/* Read a lookahead token if we need one and don't already have one. */
+/* yyresume: */
+
+ /* First try to decide what to do without reference to lookahead token. */
+
+ yyn = yypact[yystate];
+ if (yyn == YYFLAG)
+ goto yydefault;
+
+ /* Not known => get a lookahead token if don't already have one. */
+
+ /* yychar is either YYEMPTY or YYEOF
+ or a valid token in external form. */
+
+ if (yychar == YYEMPTY)
+ {
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Reading a token: ");
+#endif
+ yychar = YYLEX;
+ }
+
+ /* Convert token to internal form (in yychar1) for indexing tables with */
+
+ if (yychar <= 0) /* This means end of input. */
+ {
+ yychar1 = 0;
+ yychar = YYEOF; /* Don't call YYLEX any more */
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Now at end of input.\n");
+#endif
+ }
+ else
+ {
+ yychar1 = YYTRANSLATE(yychar);
+
+#if YYDEBUG != 0
+ if (yydebug)
+ {
+ fprintf (stderr, "Next token is %d (%s", yychar, yytname[yychar1]);
+ /* Give the individual parser a way to print the precise meaning
+ of a token, for further debugging info. */
+#ifdef YYPRINT
+ YYPRINT (stderr, yychar, yylval);
+#endif
+ fprintf (stderr, ")\n");
+ }
+#endif
+ }
+
+ yyn += yychar1;
+ if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != yychar1)
+ goto yydefault;
+
+ yyn = yytable[yyn];
+
+ /* yyn is what to do for this token type in this state.
+ Negative => reduce, -yyn is rule number.
+ Positive => shift, yyn is new state.
+ New state is final state => don't bother to shift,
+ just return success.
+ 0, or most negative number => error. */
+
+ if (yyn < 0)
+ {
+ if (yyn == YYFLAG)
+ goto yyerrlab;
+ yyn = -yyn;
+ goto yyreduce;
+ }
+ else if (yyn == 0)
+ goto yyerrlab;
+
+ if (yyn == YYFINAL)
+ YYACCEPT;
+
+ /* Shift the lookahead token. */
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Shifting token %d (%s), ", yychar, yytname[yychar1]);
+#endif
+
+ /* Discard the token being shifted unless it is eof. */
+ if (yychar != YYEOF)
+ yychar = YYEMPTY;
+
+ *++yyvsp = yylval;
+#ifdef YYLSP_NEEDED
+ *++yylsp = yylloc;
+#endif
+
+ /* count tokens shifted since error; after three, turn off error status. */
+ if (yyerrstatus) yyerrstatus--;
+
+ yystate = yyn;
+ goto yynewstate;
+
+/* Do the default action for the current state. */
+yydefault:
+
+ yyn = yydefact[yystate];
+ if (yyn == 0)
+ goto yyerrlab;
+
+/* Do a reduction. yyn is the number of a rule to reduce with. */
+yyreduce:
+ yylen = yyr2[yyn];
+ if (yylen > 0)
+ yyval = yyvsp[1-yylen]; /* implement default value of the action */
+
+#if YYDEBUG != 0
+ if (yydebug)
+ {
+ int i;
+
+ fprintf (stderr, "Reducing via rule %d (line %d), ",
+ yyn, yyrline[yyn]);
+
+ /* Print the symbols being reduced, and their result. */
+ for (i = yyprhs[yyn]; yyrhs[i] > 0; i++)
+ fprintf (stderr, "%s ", yytname[yyrhs[i]]);
+ fprintf (stderr, " -> %s\n", yytname[yyr1[yyn]]);
+ }
+#endif
+
+
+ switch (yyn) {
+
+case 3:
+#line 118 "parsedate.y"
+{
+ yyHaveTime++;
+#ifdef lint
+ /* I am compulsive about lint natterings... */
+ if (yyHaveTime == -1) {
+ YYERROR;
+ }
+#endif /* lint */
+ ;
+ break;}
+case 4:
+#line 127 "parsedate.y"
+{
+ yyHaveTime++;
+ yyTimezone = yyvsp[0].Number;
+ ;
+ break;}
+case 5:
+#line 131 "parsedate.y"
+{
+ yyHaveDate++;
+ ;
+ break;}
+case 6:
+#line 134 "parsedate.y"
+{
+ yyHaveRel = 1;
+ ;
+ break;}
+case 7:
+#line 139 "parsedate.y"
+{
+ if (yyvsp[-1].Number < 100) {
+ yyHour = yyvsp[-1].Number;
+ yyMinutes = 0;
+ }
+ else {
+ yyHour = yyvsp[-1].Number / 100;
+ yyMinutes = yyvsp[-1].Number % 100;
+ }
+ yySeconds = 0;
+ yyMeridian = yyvsp[0].Meridian;
+ ;
+ break;}
+case 8:
+#line 151 "parsedate.y"
+{
+ yyHour = yyvsp[-3].Number;
+ yyMinutes = yyvsp[-1].Number;
+ yySeconds = 0;
+ yyMeridian = yyvsp[0].Meridian;
+ ;
+ break;}
+case 9:
+#line 157 "parsedate.y"
+{
+ yyHour = yyvsp[-3].Number;
+ yyMinutes = yyvsp[-1].Number;
+ yyTimezone = yyvsp[0].Number;
+ yyMeridian = MER24;
+ yyDSTmode = DSToff;
+ ;
+ break;}
+case 10:
+#line 164 "parsedate.y"
+{
+ yyHour = yyvsp[-5].Number;
+ yyMinutes = yyvsp[-3].Number;
+ yySeconds = yyvsp[-1].Number;
+ yyMeridian = yyvsp[0].Meridian;
+ ;
+ break;}
+case 11:
+#line 170 "parsedate.y"
+{
+ yyHour = yyvsp[-5].Number;
+ yyMinutes = yyvsp[-3].Number;
+ yySeconds = yyvsp[-1].Number;
+ yyTimezone = yyvsp[0].Number;
+ yyMeridian = MER24;
+ yyDSTmode = DSToff;
+ ;
+ break;}
+case 12:
+#line 180 "parsedate.y"
+{
+ yyval.Number = yyvsp[0].Number;
+ yyDSTmode = DSToff;
+ ;
+ break;}
+case 13:
+#line 184 "parsedate.y"
+{
+ yyval.Number = yyvsp[0].Number;
+ yyDSTmode = DSTon;
+ ;
+ break;}
+case 14:
+#line 188 "parsedate.y"
+{
+ /* Only allow "GMT+300" and "GMT-0800" */
+ if (yyvsp[-1].Number != 0) {
+ YYABORT;
+ }
+ yyval.Number = yyvsp[0].Number;
+ yyDSTmode = DSToff;
+ ;
+ break;}
+case 15:
+#line 196 "parsedate.y"
+{
+ yyval.Number = yyvsp[0].Number;
+ yyDSTmode = DSToff;
+ ;
+ break;}
+case 16:
+#line 202 "parsedate.y"
+{
+ int i;
+
+ /* Unix and GMT and numeric timezones -- a little confusing. */
+ if (yyvsp[0].Number < 0) {
+ /* Don't work with negative modulus. */
+ yyvsp[0].Number = -yyvsp[0].Number;
+ if (yyvsp[0].Number > 9999 || (i = yyvsp[0].Number % 100) >= 60) {
+ YYABORT;
+ }
+ yyval.Number = (yyvsp[0].Number / 100) * 60 + i;
+ }
+ else {
+ if (yyvsp[0].Number > 9999 || (i = yyvsp[0].Number % 100) >= 60) {
+ YYABORT;
+ }
+ yyval.Number = -((yyvsp[0].Number / 100) * 60 + i);
+ }
+ ;
+ break;}
+case 17:
+#line 223 "parsedate.y"
+{
+ yyMonth = yyvsp[-2].Number;
+ yyDay = yyvsp[0].Number;
+ ;
+ break;}
+case 18:
+#line 227 "parsedate.y"
+{
+ if (yyvsp[-4].Number > 100) {
+ yyYear = yyvsp[-4].Number;
+ yyMonth = yyvsp[-2].Number;
+ yyDay = yyvsp[0].Number;
+ }
+ else {
+ yyMonth = yyvsp[-4].Number;
+ yyDay = yyvsp[-2].Number;
+ yyYear = yyvsp[0].Number;
+ }
+ ;
+ break;}
+case 19:
+#line 239 "parsedate.y"
+{
+ yyMonth = yyvsp[-1].Number;
+ yyDay = yyvsp[0].Number;
+ ;
+ break;}
+case 20:
+#line 243 "parsedate.y"
+{
+ yyMonth = yyvsp[-3].Number;
+ yyDay = yyvsp[-2].Number;
+ yyYear = yyvsp[0].Number;
+ ;
+ break;}
+case 21:
+#line 248 "parsedate.y"
+{
+ yyDay = yyvsp[-1].Number;
+ yyMonth = yyvsp[0].Number;
+ ;
+ break;}
+case 22:
+#line 252 "parsedate.y"
+{
+ yyDay = yyvsp[-2].Number;
+ yyMonth = yyvsp[-1].Number;
+ yyYear = yyvsp[0].Number;
+ ;
+ break;}
+case 23:
+#line 257 "parsedate.y"
+{
+ yyDay = yyvsp[-2].Number;
+ yyMonth = yyvsp[-1].Number;
+ yyYear = yyvsp[0].Number;
+ ;
+ break;}
+case 24:
+#line 264 "parsedate.y"
+{
+ yyRelSeconds += yyvsp[-1].Number * yyvsp[0].Number;
+ ;
+ break;}
+case 25:
+#line 267 "parsedate.y"
+{
+ yyRelSeconds += yyvsp[-1].Number * yyvsp[0].Number;
+ ;
+ break;}
+case 26:
+#line 270 "parsedate.y"
+{
+ yyRelMonth += yyvsp[-1].Number * yyvsp[0].Number;
+ ;
+ break;}
+case 27:
+#line 273 "parsedate.y"
+{
+ yyRelMonth += yyvsp[-1].Number * yyvsp[0].Number;
+ ;
+ break;}
+case 28:
+#line 278 "parsedate.y"
+{
+ yyval.Meridian = MER24;
+ ;
+ break;}
+case 29:
+#line 281 "parsedate.y"
+{
+ yyval.Meridian = yyvsp[0].Meridian;
+ ;
+ break;}
+}
+ /* the action file gets copied in in place of this dollarsign */
+#line 465 "/usr/lib/bison.simple"
+\f
+ yyvsp -= yylen;
+ yyssp -= yylen;
+#ifdef YYLSP_NEEDED
+ yylsp -= yylen;
+#endif
+
+#if YYDEBUG != 0
+ if (yydebug)
+ {
+ short *ssp1 = yyss - 1;
+ fprintf (stderr, "state stack now");
+ while (ssp1 != yyssp)
+ fprintf (stderr, " %d", *++ssp1);
+ fprintf (stderr, "\n");
+ }
+#endif
+
+ *++yyvsp = yyval;
+
+#ifdef YYLSP_NEEDED
+ yylsp++;
+ if (yylen == 0)
+ {
+ yylsp->first_line = yylloc.first_line;
+ yylsp->first_column = yylloc.first_column;
+ yylsp->last_line = (yylsp-1)->last_line;
+ yylsp->last_column = (yylsp-1)->last_column;
+ yylsp->text = 0;
+ }
+ else
+ {
+ yylsp->last_line = (yylsp+yylen-1)->last_line;
+ yylsp->last_column = (yylsp+yylen-1)->last_column;
+ }
+#endif
+
+ /* Now "shift" the result of the reduction.
+ Determine what state that goes to,
+ based on the state we popped back to
+ and the rule number reduced by. */
+
+ yyn = yyr1[yyn];
+
+ yystate = yypgoto[yyn - YYNTBASE] + *yyssp;
+ if (yystate >= 0 && yystate <= YYLAST && yycheck[yystate] == *yyssp)
+ yystate = yytable[yystate];
+ else
+ yystate = yydefgoto[yyn - YYNTBASE];
+
+ goto yynewstate;
+
+yyerrlab: /* here on detecting error */
+
+ if (! yyerrstatus)
+ /* If not already recovering from an error, report this error. */
+ {
+ ++yynerrs;
+
+#ifdef YYERROR_VERBOSE
+ yyn = yypact[yystate];
+
+ if (yyn > YYFLAG && yyn < YYLAST)
+ {
+ int size = 0;
+ char *msg;
+ int x, count;
+
+ count = 0;
+ /* Start X at -yyn if nec to avoid negative indexes in yycheck. */
+ for (x = (yyn < 0 ? -yyn : 0);
+ x < (sizeof(yytname) / sizeof(char *)); x++)
+ if (yycheck[x + yyn] == x)
+ size += strlen(yytname[x]) + 15, count++;
+ msg = (char *) malloc(size + 15);
+ if (msg != 0)
+ {
+ strcpy(msg, "parse error");
+
+ if (count < 5)
+ {
+ count = 0;
+ for (x = (yyn < 0 ? -yyn : 0);
+ x < (sizeof(yytname) / sizeof(char *)); x++)
+ if (yycheck[x + yyn] == x)
+ {
+ strcat(msg, count == 0 ? ", expecting `" : " or `");
+ strcat(msg, yytname[x]);
+ strcat(msg, "'");
+ count++;
+ }
+ }
+ yyerror(msg);
+ free(msg);
+ }
+ else
+ yyerror ("parse error; also virtual memory exceeded");
+ }
+ else
+#endif /* YYERROR_VERBOSE */
+ yyerror("parse error");
+ }
+
+ goto yyerrlab1;
+yyerrlab1: /* here on error raised explicitly by an action */
+
+ if (yyerrstatus == 3)
+ {
+ /* if just tried and failed to reuse lookahead token after an error, discard it. */
+
+ /* return failure if at end of input */
+ if (yychar == YYEOF)
+ YYABORT;
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Discarding token %d (%s).\n", yychar, yytname[yychar1]);
+#endif
+
+ yychar = YYEMPTY;
+ }
+
+ /* Else will try to reuse lookahead token
+ after shifting the error token. */
+
+ yyerrstatus = 3; /* Each real token shifted decrements this */
+
+ goto yyerrhandle;
+
+yyerrdefault: /* current state does not do anything special for the error token. */
+
+#if 0
+ /* This is wrong; only states that explicitly want error tokens
+ should shift them. */
+ yyn = yydefact[yystate]; /* If its default is to accept any token, ok. Otherwise pop it.*/
+ if (yyn) goto yydefault;
+#endif
+
+yyerrpop: /* pop the current state because it cannot handle the error token */
+
+ if (yyssp == yyss) YYABORT;
+ yyvsp--;
+ yystate = *--yyssp;
+#ifdef YYLSP_NEEDED
+ yylsp--;
+#endif
+
+#if YYDEBUG != 0
+ if (yydebug)
+ {
+ short *ssp1 = yyss - 1;
+ fprintf (stderr, "Error: state stack now");
+ while (ssp1 != yyssp)
+ fprintf (stderr, " %d", *++ssp1);
+ fprintf (stderr, "\n");
+ }
+#endif
+
+yyerrhandle:
+
+ yyn = yypact[yystate];
+ if (yyn == YYFLAG)
+ goto yyerrdefault;
+
+ yyn += YYTERROR;
+ if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != YYTERROR)
+ goto yyerrdefault;
+
+ yyn = yytable[yyn];
+ if (yyn < 0)
+ {
+ if (yyn == YYFLAG)
+ goto yyerrpop;
+ yyn = -yyn;
+ goto yyreduce;
+ }
+ else if (yyn == 0)
+ goto yyerrpop;
+
+ if (yyn == YYFINAL)
+ YYACCEPT;
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Shifting error token, ");
+#endif
+
+ *++yyvsp = yylval;
+#ifdef YYLSP_NEEDED
+ *++yylsp = yylloc;
+#endif
+
+ yystate = yyn;
+ goto yynewstate;
+}
+#line 286 "parsedate.y"
+
+
+/* Month and day table. */
+static TABLE 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 },
+ { "october", tMONTH, 10 },
+ { "november", tMONTH, 11 },
+ { "december", tMONTH, 12 },
+ /* The value of the day isn't used... */
+ { "sunday", tDAY, 0 },
+ { "monday", tDAY, 0 },
+ { "tuesday", tDAY, 0 },
+ { "wednesday", tDAY, 0 },
+ { "thursday", tDAY, 0 },
+ { "friday", tDAY, 0 },
+ { "saturday", tDAY, 0 },
+};
+
+/* Time units table. */
+static TABLE UnitsTable[] = {
+ { "year", tMONTH_UNIT, 12 },
+ { "month", tMONTH_UNIT, 1 },
+ { "week", tSEC_UNIT, 7L * 24 * 60 * 60 },
+ { "day", tSEC_UNIT, 1L * 24 * 60 * 60 },
+ { "hour", tSEC_UNIT, 60 * 60 },
+ { "minute", tSEC_UNIT, 60 },
+ { "min", tSEC_UNIT, 60 },
+ { "second", tSEC_UNIT, 1 },
+ { "sec", tSEC_UNIT, 1 },
+};
+
+/* Timezone table. */
+static TABLE TimezoneTable[] = {
+ { "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */
+ { "ut", tZONE, HOUR( 0) }, /* Universal */
+ { "utc", tZONE, HOUR( 0) }, /* Universal Coordinated */
+ { "cut", tZONE, HOUR( 0) }, /* Coordinated Universal */
+ { "z", tZONE, HOUR( 0) }, /* Greenwich Mean */
+ { "wet", tZONE, HOUR( 0) }, /* Western European */
+ { "bst", tDAYZONE, HOUR( 0) }, /* British Summer */
+ { "nst", tZONE, HOUR(3)+30 }, /* Newfoundland Standard */
+ { "ndt", tDAYZONE, HOUR(3)+30 }, /* Newfoundland Daylight */
+ { "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 */
+ { "akst", tZONE, HOUR( 9) }, /* Alaska Standard */
+ { "akdt", tDAYZONE, HOUR( 9) }, /* Alaska Daylight */
+ { "hst", tZONE, HOUR(10) }, /* Hawaii Standard */
+ { "hast", tZONE, HOUR(10) }, /* Hawaii-Aleutian Standard */
+ { "hadt", tDAYZONE, HOUR(10) }, /* Hawaii-Aleutian Daylight */
+ { "ces", tDAYZONE, -HOUR(1) }, /* Central European Summer */
+ { "cest", tDAYZONE, -HOUR(1) }, /* Central European Summer */
+ { "mez", tZONE, -HOUR(1) }, /* Middle European */
+ { "mezt", tDAYZONE, -HOUR(1) }, /* Middle European Summer */
+ { "cet", tZONE, -HOUR(1) }, /* Central European */
+ { "met", tZONE, -HOUR(1) }, /* Middle European */
+ { "eet", tZONE, -HOUR(2) }, /* Eastern Europe */
+ { "msk", tZONE, -HOUR(3) }, /* Moscow Winter */
+ { "msd", tDAYZONE, -HOUR(3) }, /* Moscow Summer */
+ { "wast", tZONE, -HOUR(8) }, /* West Australian Standard */
+ { "wadt", tDAYZONE, -HOUR(8) }, /* West Australian Daylight */
+ { "hkt", tZONE, -HOUR(8) }, /* Hong Kong */
+ { "cct", tZONE, -HOUR(8) }, /* China Coast */
+ { "jst", tZONE, -HOUR(9) }, /* Japan Standard */
+ { "kst", tZONE, -HOUR(9) }, /* Korean Standard */
+ { "kdt", tZONE, -HOUR(9) }, /* Korean Daylight */
+ { "cast", tZONE, -(HOUR(9)+30) }, /* Central Australian Standard */
+ { "cadt", tDAYZONE, -(HOUR(9)+30) }, /* Central Australian Daylight */
+ { "east", tZONE, -HOUR(10) }, /* Eastern Australian Standard */
+ { "eadt", tDAYZONE, -HOUR(10) }, /* Eastern Australian Daylight */
+ { "nzst", tZONE, -HOUR(12) }, /* New Zealand Standard */
+ { "nzdt", tDAYZONE, -HOUR(12) }, /* New Zealand Daylight */
+
+ /* For completeness we include the following entries. */
+#if 0
+
+ /* Duplicate names. Either they conflict with a zone listed above
+ * (which is either more likely to be seen or just been in circulation
+ * longer), or they conflict with another zone in this section and
+ * we could not reasonably choose one over the other. */
+ { "fst", tZONE, HOUR( 2) }, /* Fernando De Noronha Standard */
+ { "fdt", tDAYZONE, HOUR( 2) }, /* Fernando De Noronha Daylight */
+ { "bst", tZONE, HOUR( 3) }, /* Brazil Standard */
+ { "est", tZONE, HOUR( 3) }, /* Eastern Standard (Brazil) */
+ { "edt", tDAYZONE, HOUR( 3) }, /* Eastern Daylight (Brazil) */
+ { "wst", tZONE, HOUR( 4) }, /* Western Standard (Brazil) */
+ { "wdt", tDAYZONE, HOUR( 4) }, /* Western Daylight (Brazil) */
+ { "cst", tZONE, HOUR( 5) }, /* Chile Standard */
+ { "cdt", tDAYZONE, HOUR( 5) }, /* Chile Daylight */
+ { "ast", tZONE, HOUR( 5) }, /* Acre Standard */
+ { "adt", tDAYZONE, HOUR( 5) }, /* Acre Daylight */
+ { "cst", tZONE, HOUR( 5) }, /* Cuba Standard */
+ { "cdt", tDAYZONE, HOUR( 5) }, /* Cuba Daylight */
+ { "est", tZONE, HOUR( 6) }, /* Easter Island Standard */
+ { "edt", tDAYZONE, HOUR( 6) }, /* Easter Island Daylight */
+ { "sst", tZONE, HOUR(11) }, /* Samoa Standard */
+ { "ist", tZONE, -HOUR(2) }, /* Israel Standard */
+ { "idt", tDAYZONE, -HOUR(2) }, /* Israel Daylight */
+ { "idt", tDAYZONE, -(HOUR(3)+30) }, /* Iran Daylight */
+ { "ist", tZONE, -(HOUR(3)+30) }, /* Iran Standard */
+ { "cst", tZONE, -HOUR(8) }, /* China Standard */
+ { "cdt", tDAYZONE, -HOUR(8) }, /* China Daylight */
+ { "sst", tZONE, -HOUR(8) }, /* Singapore Standard */
+
+ /* Dubious (e.g., not in Olson's TIMEZONE package) or obsolete. */
+ { "gst", tZONE, HOUR( 3) }, /* Greenland Standard */
+ { "wat", tZONE, -HOUR(1) }, /* West Africa */
+ { "at", tZONE, HOUR( 2) }, /* Azores */
+ { "gst", tZONE, -HOUR(10) }, /* Guam Standard */
+ { "nft", tZONE, HOUR(3)+30 }, /* Newfoundland */
+ { "idlw", tZONE, HOUR(12) }, /* International Date Line West */
+ { "mewt", tZONE, -HOUR(1) }, /* Middle European Winter */
+ { "mest", 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 */
+ { "bt", tZONE, -HOUR(3) }, /* Baghdad */
+ { "it", tZONE, -(HOUR(3)+30) }, /* Iran */
+ { "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */
+ { "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */
+ { "ist", tZONE, -(HOUR(5)+30) }, /* Indian Standard */
+ { "zp6", tZONE, -HOUR(6) }, /* USSR Zone 5 */
+ { "nst", tZONE, -HOUR(7) }, /* North Sumatra */
+ { "sst", tZONE, -HOUR(7) }, /* South Sumatra */
+ { "jt", tZONE, -(HOUR(7)+30) }, /* Java (3pm in Cronusland!) */
+ { "nzt", tZONE, -HOUR(12) }, /* New Zealand */
+ { "idle", tZONE, -HOUR(12) }, /* International Date Line East */
+ { "cat", tZONE, HOUR(10) }, /* -- expired 1967 */
+ { "nt", tZONE, HOUR(11) }, /* -- expired 1967 */
+ { "ahst", tZONE, HOUR(10) }, /* -- expired 1983 */
+ { "hdt", tDAYZONE, HOUR(10) }, /* -- expired 1986 */
+#endif /* 0 */
+};
+
+
+/* ARGSUSED */
+static void
+date_error(s)
+ char *s;
+{
+ /* NOTREACHED */
+}
+
+
+static time_t
+ToSeconds(Hours, Minutes, Seconds, Meridian)
+ time_t Hours;
+ time_t Minutes;
+ time_t Seconds;
+ MERIDIAN Meridian;
+{
+ if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 61)
+ return -1;
+ if (Meridian == MER24) {
+ if (Hours < 0 || Hours > 23)
+ return -1;
+ }
+ else {
+ if (Hours < 1 || Hours > 12)
+ return -1;
+ if (Hours == 12)
+ Hours = 0;
+ if (Meridian == MERpm)
+ Hours += 12;
+ }
+ return (Hours * 60L + Minutes) * 60L + Seconds;
+}
+
+
+static time_t
+Convert(Month, Day, Year, Hours, Minutes, Seconds, Meridian, dst)
+ time_t Month;
+ time_t Day;
+ time_t Year;
+ time_t Hours;
+ time_t Minutes;
+ time_t Seconds;
+ MERIDIAN Meridian;
+ DSTMODE dst;
+{
+ static int DaysNormal[13] = {
+ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+ };
+ static int DaysLeap[13] = {
+ 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+ };
+ static int LeapYears[] = {
+ 1972, 1976, 1980, 1984, 1988, 1992, 1996,
+ 2000, 2004, 2008, 2012, 2016, 2020, 2024, 2028, 2032, 2036
+ };
+ register int *yp;
+ register int *mp;
+ register time_t Julian;
+ register int i;
+ time_t tod;
+
+ if (Year < 0)
+ Year = -Year;
+ if (Year < 100)
+ Year += 1900;
+ if (Year < EPOCH)
+ Year += 100;
+ for (mp = DaysNormal, yp = LeapYears; yp < ENDOF(LeapYears); yp++)
+ if (Year == *yp) {
+ mp = DaysLeap;
+ break;
+ }
+ if (Year < EPOCH || Year > END_OF_TIME
+ || Month < 1 || Month > 12
+ /* NOSTRICT *//* conversion from long may lose accuracy */
+ || Day < 1 || Day > mp[(int)Month])
+ return -1;
+
+ Julian = Day - 1 + (Year - EPOCH) * 365;
+ for (yp = LeapYears; yp < ENDOF(LeapYears); yp++, Julian++)
+ if (Year <= *yp)
+ break;
+ for (i = 1; i < Month; i++)
+ Julian += *++mp;
+ Julian *= SECSPERDAY;
+ Julian += yyTimezone * 60L;
+ if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0)
+ return -1;
+ Julian += tod;
+ tod = Julian;
+ if (dst == DSTon || (dst == DSTmaybe && localtime(&tod)->tm_isdst))
+ Julian -= DST_OFFSET * 60L * 60L;
+ return Julian;
+}
+
+
+static time_t
+DSTcorrect(Start, Future)
+ time_t Start;
+ time_t Future;
+{
+ time_t StartDay;
+ time_t FutureDay;
+
+ StartDay = (localtime(&Start)->tm_hour + 1) % 24;
+ FutureDay = (localtime(&Future)->tm_hour + 1) % 24;
+ return (Future - Start) + (StartDay - FutureDay) * DST_OFFSET * 60L * 60L;
+}
+
+
+static time_t
+RelativeMonth(Start, RelMonth)
+ time_t Start;
+ time_t RelMonth;
+{
+ struct tm *tm;
+ time_t Month;
+ time_t Year;
+
+ tm = localtime(&Start);
+ Month = 12 * tm->tm_year + tm->tm_mon + RelMonth;
+ Year = Month / 12;
+ Month = Month % 12 + 1;
+ return DSTcorrect(Start,
+ Convert(Month, (time_t)tm->tm_mday, Year,
+ (time_t)tm->tm_hour, (time_t)tm->tm_min, (time_t)tm->tm_sec,
+ MER24, DSTmaybe));
+}
+
+
+static int
+LookupWord(buff, length)
+ char *buff;
+ register int length;
+{
+ register char *p;
+ register char *q;
+ register TABLE *tp;
+ register int c;
+
+ p = buff;
+ c = p[0];
+
+ /* See if we have an abbreviation for a month. */
+ if (length == 3 || (length == 4 && p[3] == '.'))
+ for (tp = MonthDayTable; tp < ENDOF(MonthDayTable); tp++) {
+ q = tp->name;
+ if (c == q[0] && p[1] == q[1] && p[2] == q[2]) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+ else
+ for (tp = MonthDayTable; tp < ENDOF(MonthDayTable); tp++)
+ if (c == tp->name[0] && strcmp(p, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+
+ /* Try for a timezone. */
+ for (tp = TimezoneTable; tp < ENDOF(TimezoneTable); tp++)
+ if (c == tp->name[0] && p[1] == tp->name[1]
+ && strcmp(p, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+
+ /* Try the units table. */
+ for (tp = UnitsTable; tp < ENDOF(UnitsTable); tp++)
+ if (c == tp->name[0] && strcmp(p, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+
+ /* Strip off any plural and try the units table again. */
+ if (--length > 0 && p[length] == 's') {
+ p[length] = '\0';
+ for (tp = UnitsTable; tp < ENDOF(UnitsTable); tp++)
+ if (c == tp->name[0] && strcmp(p, tp->name) == 0) {
+ p[length] = 's';
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ p[length] = 's';
+ }
+ length++;
+
+ /* Drop out any periods. */
+ for (p = buff, q = (char*)buff; *q; q++)
+ if (*q != '.')
+ *p++ = *q;
+ *p = '\0';
+
+ /* Try the meridians. */
+ if (buff[1] == 'm' && buff[2] == '\0') {
+ if (buff[0] == 'a') {
+ yylval.Meridian = MERam;
+ return tMERIDIAN;
+ }
+ if (buff[0] == 'p') {
+ yylval.Meridian = MERpm;
+ return tMERIDIAN;
+ }
+ }
+
+ /* If we saw any periods, try the timezones again. */
+ if (p - buff != length) {
+ c = buff[0];
+ for (p = buff, tp = TimezoneTable; tp < ENDOF(TimezoneTable); tp++)
+ if (c == tp->name[0] && p[1] == tp->name[1]
+ && strcmp(p, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+
+ /* Unknown word -- assume GMT timezone. */
+ yylval.Number = 0;
+ return tZONE;
+}
+
+
+int
+date_lex()
+{
+ register char c;
+ register char *p;
+ char buff[20];
+ register int sign;
+ register int i;
+ register int nesting;
+
+ for ( ; ; ) {
+ /* Get first character after the whitespace. */
+ for ( ; ; ) {
+ while (isspace(*yyInput))
+ yyInput++;
+ c = *yyInput;
+
+ /* Ignore RFC 822 comments, typically time zone names. */
+ if (c != LPAREN)
+ break;
+ for (nesting = 1; (c = *++yyInput) != RPAREN || --nesting; )
+ if (c == LPAREN)
+ nesting++;
+ else if (!IS7BIT(c) || c == '\0' || c == '\r'
+ || (c == '\\' && ((c = *++yyInput) == '\0' || !IS7BIT(c))))
+ /* Lexical error: bad comment. */
+ return '?';
+ yyInput++;
+ }
+
+ /* A number? */
+ if (isdigit(c) || c == '-' || c == '+') {
+ if (c == '-' || c == '+') {
+ sign = c == '-' ? -1 : 1;
+ yyInput++;
+ if (!isdigit(*yyInput))
+ /* Skip the plus or minus sign. */
+ continue;
+ }
+ else
+ sign = 0;
+ for (i = 0; (c = *yyInput++) != '\0' && isdigit(c); )
+ i = 10 * i + c - '0';
+ yyInput--;
+ yylval.Number = sign < 0 ? -i : i;
+ return sign ? tSNUMBER : tUNUMBER;
+ }
+
+ /* A word? */
+ if (isalpha(c)) {
+ for (p = buff; (c = *yyInput++) == '.' || isalpha(c); )
+ if (p < &buff[sizeof buff - 1])
+ *p++ = isupper(c) ? tolower(c) : c;
+ *p = '\0';
+ yyInput--;
+ return LookupWord(buff, p - buff);
+ }
+
+ return *yyInput++;
+ }
+}
+
+
+time_t
+parsedate(p)
+ char *p;
+{
+ extern int date_parse();
+ time_t Start;
+
+ yyInput = p;
+
+ yyYear = 0;
+ yyMonth = 0;
+ yyDay = 0;
+ yyTimezone = 0;
+ yyDSTmode = DSTmaybe;
+ yyHour = 0;
+ yyMinutes = 0;
+ yySeconds = 0;
+ yyMeridian = MER24;
+ yyRelSeconds = 0;
+ yyRelMonth = 0;
+ yyHaveDate = 0;
+ yyHaveRel = 0;
+ yyHaveTime = 0;
+
+ if (date_parse() || yyHaveTime > 1 || yyHaveDate > 1)
+ return -1;
+
+ if (yyHaveDate || yyHaveTime) {
+ Start = Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds,
+ yyMeridian, yyDSTmode);
+ if (Start < 0)
+ return -1;
+ }
+ else
+ return -1;
+
+ Start += yyRelSeconds;
+ if (yyRelMonth)
+ Start += RelativeMonth(Start, yyRelMonth);
+
+ /* Have to do *something* with a legitimate -1 so it's distinguishable
+ * from the error return value. (Alternately could set errno on error.) */
+ return Start == -1 ? 0 : Start;
+}
+
+
+#ifdef TEST
+
+#if YYDEBUG
+extern int yydebug;
+#endif /* YYDEBUG */
+
+/* ARGSUSED */
+int
+main(ac, av)
+ int ac;
+ char *av[];
+{
+ char buff[128];
+ time_t d;
+
+#if YYDEBUG
+ yydebug = 1;
+#endif /* YYDEBUG */
+
+ (void)printf("Enter date, or blank line to exit.\n\t> ");
+ for ( ; ; ) {
+ (void)printf("\t> ");
+ (void)fflush(stdout);
+ if (gets(buff) == NULL || buff[0] == '\n')
+ break;
+#if YYDEBUG
+ if (strcmp(buff, "yydebug") == 0) {
+ yydebug = !yydebug;
+ printf("yydebug = %s\n", yydebug ? "on" : "off");
+ continue;
+ }
+#endif /* YYDEBUG */
+ d = parsedate(buff);
+ if (d == -1)
+ (void)printf("Bad format - couldn't convert.\n");
+ else
+ (void)printf("%s", ctime(&d));
+ }
+
+ exit(0);
+ /* NOTREACHED */
+}
+#endif /* TEST */
--- /dev/null
+%{
+/* $Revision$
+**
+** 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@osf.org> and Jim Berets <jberets@bbn.com> in August, 1990.
+** Further revised (removed obsolete constructs and cleaned up timezone
+** names) in August, 1991, by Rich. Paul Eggert <eggert@twinsun.com>
+** helped in September, 1992.
+**
+** This grammar has six shift/reduce conflicts.
+**
+** This code is in the public domain and has no copyright.
+*/
+/* SUPPRESS 530 *//* Empty body for statement */
+/* SUPPRESS 593 on yyerrlab *//* Label was not used */
+/* SUPPRESS 593 on yynewstate *//* Label was not used */
+/* SUPPRESS 595 on yypvt *//* Automatic variable may be used before set */
+#include <stdio.h>
+#include <sys/types.h>
+#include <ctype.h>
+#include <time.h>
+
+int date_lex();
+
+#define yyparse date_parse
+#define yylex date_lex
+#define yyerror date_error
+
+
+ /* See the LeapYears table in Convert. */
+#define EPOCH 1970
+#define END_OF_TIME 2038
+ /* Constants for general time calculations. */
+#define DST_OFFSET 1
+#define SECSPERDAY (24L * 60L * 60L)
+ /* Readability for TABLE stuff. */
+#define HOUR(x) (x * 60)
+
+#define LPAREN '('
+#define RPAREN ')'
+#define IS7BIT(x) ((unsigned int)(x) < 0200)
+
+#define SIZEOF(array) ((int)(sizeof array / sizeof array[0]))
+#define ENDOF(array) (&array[SIZEOF(array)])
+
+
+/*
+** An entry in the lexical lookup table.
+*/
+typedef struct _TABLE {
+ char *name;
+ int type;
+ time_t value;
+} TABLE;
+
+/*
+** Daylight-savings mode: on, off, or not yet known.
+*/
+typedef enum _DSTMODE {
+ DSTon, DSToff, DSTmaybe
+} DSTMODE;
+
+/*
+** Meridian: am, pm, or 24-hour style.
+*/
+typedef enum _MERIDIAN {
+ MERam, MERpm, MER24
+} MERIDIAN;
+
+
+/*
+** Global variables. We could get rid of most of them by using a yacc
+** union, but this is more efficient. (This routine predates the
+** yacc %union construct.)
+*/
+static char *yyInput;
+static DSTMODE yyDSTmode;
+static int yyHaveDate;
+static int yyHaveRel;
+static int yyHaveTime;
+static time_t yyTimezone;
+static time_t yyDay;
+static time_t yyHour;
+static time_t yyMinutes;
+static time_t yyMonth;
+static time_t yySeconds;
+static time_t yyYear;
+static MERIDIAN yyMeridian;
+static time_t yyRelMonth;
+static time_t yyRelSeconds;
+
+
+extern struct tm *localtime();
+
+static void date_error();
+%}
+
+%union {
+ time_t Number;
+ enum _MERIDIAN Meridian;
+}
+
+%token tDAY tDAYZONE tMERIDIAN tMONTH tMONTH_UNIT tSEC_UNIT tSNUMBER
+%token tUNUMBER tZONE
+
+%type <Number> tDAYZONE tMONTH tMONTH_UNIT tSEC_UNIT
+%type <Number> tSNUMBER tUNUMBER tZONE numzone zone
+%type <Meridian> tMERIDIAN o_merid
+
+%%
+
+spec : /* NULL */
+ | spec item
+ ;
+
+item : time {
+ yyHaveTime++;
+#ifdef lint
+ /* I am compulsive about lint natterings... */
+ if (yyHaveTime == -1) {
+ YYERROR;
+ }
+#endif /* lint */
+ }
+ | time zone {
+ yyHaveTime++;
+ yyTimezone = $2;
+ }
+ | date {
+ yyHaveDate++;
+ }
+ | rel {
+ yyHaveRel = 1;
+ }
+ ;
+
+time : tUNUMBER o_merid {
+ if ($1 < 100) {
+ yyHour = $1;
+ yyMinutes = 0;
+ }
+ else {
+ yyHour = $1 / 100;
+ yyMinutes = $1 % 100;
+ }
+ yySeconds = 0;
+ yyMeridian = $2;
+ }
+ | tUNUMBER ':' tUNUMBER o_merid {
+ yyHour = $1;
+ yyMinutes = $3;
+ yySeconds = 0;
+ yyMeridian = $4;
+ }
+ | tUNUMBER ':' tUNUMBER numzone {
+ yyHour = $1;
+ yyMinutes = $3;
+ yyTimezone = $4;
+ yyMeridian = MER24;
+ yyDSTmode = DSToff;
+ }
+ | tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid {
+ yyHour = $1;
+ yyMinutes = $3;
+ yySeconds = $5;
+ yyMeridian = $6;
+ }
+ | tUNUMBER ':' tUNUMBER ':' tUNUMBER numzone {
+ yyHour = $1;
+ yyMinutes = $3;
+ yySeconds = $5;
+ yyTimezone = $6;
+ yyMeridian = MER24;
+ yyDSTmode = DSToff;
+ }
+ ;
+
+zone : tZONE {
+ $$ = $1;
+ yyDSTmode = DSToff;
+ }
+ | tDAYZONE {
+ $$ = $1;
+ yyDSTmode = DSTon;
+ }
+ | tZONE numzone {
+ /* Only allow "GMT+300" and "GMT-0800" */
+ if ($1 != 0) {
+ YYABORT;
+ }
+ $$ = $2;
+ yyDSTmode = DSToff;
+ }
+ | numzone {
+ $$ = $1;
+ yyDSTmode = DSToff;
+ }
+ ;
+
+numzone : tSNUMBER {
+ int i;
+
+ /* Unix and GMT and numeric timezones -- a little confusing. */
+ if ($1 < 0) {
+ /* Don't work with negative modulus. */
+ $1 = -$1;
+ if ($1 > 9999 || (i = $1 % 100) >= 60) {
+ YYABORT;
+ }
+ $$ = ($1 / 100) * 60 + i;
+ }
+ else {
+ if ($1 > 9999 || (i = $1 % 100) >= 60) {
+ YYABORT;
+ }
+ $$ = -(($1 / 100) * 60 + i);
+ }
+ }
+ ;
+
+date : tUNUMBER '/' tUNUMBER {
+ yyMonth = $1;
+ yyDay = $3;
+ }
+ | tUNUMBER '/' tUNUMBER '/' tUNUMBER {
+ if ($1 > 100) {
+ yyYear = $1;
+ yyMonth = $3;
+ yyDay = $5;
+ }
+ else {
+ yyMonth = $1;
+ yyDay = $3;
+ yyYear = $5;
+ }
+ }
+ | tMONTH tUNUMBER {
+ yyMonth = $1;
+ yyDay = $2;
+ }
+ | tMONTH tUNUMBER ',' tUNUMBER {
+ yyMonth = $1;
+ yyDay = $2;
+ yyYear = $4;
+ }
+ | tUNUMBER tMONTH {
+ yyDay = $1;
+ yyMonth = $2;
+ }
+ | tUNUMBER tMONTH tUNUMBER {
+ yyDay = $1;
+ yyMonth = $2;
+ yyYear = $3;
+ }
+ | tDAY ',' tUNUMBER tMONTH tUNUMBER {
+ yyDay = $3;
+ yyMonth = $4;
+ yyYear = $5;
+ }
+ ;
+
+rel : tSNUMBER tSEC_UNIT {
+ yyRelSeconds += $1 * $2;
+ }
+ | tUNUMBER tSEC_UNIT {
+ yyRelSeconds += $1 * $2;
+ }
+ | tSNUMBER tMONTH_UNIT {
+ yyRelMonth += $1 * $2;
+ }
+ | tUNUMBER tMONTH_UNIT {
+ yyRelMonth += $1 * $2;
+ }
+ ;
+
+o_merid : /* NULL */ {
+ $$ = MER24;
+ }
+ | tMERIDIAN {
+ $$ = $1;
+ }
+ ;
+
+%%
+
+/* Month and day table. */
+static TABLE 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 },
+ { "october", tMONTH, 10 },
+ { "november", tMONTH, 11 },
+ { "december", tMONTH, 12 },
+ /* The value of the day isn't used... */
+ { "sunday", tDAY, 0 },
+ { "monday", tDAY, 0 },
+ { "tuesday", tDAY, 0 },
+ { "wednesday", tDAY, 0 },
+ { "thursday", tDAY, 0 },
+ { "friday", tDAY, 0 },
+ { "saturday", tDAY, 0 },
+};
+
+/* Time units table. */
+static TABLE UnitsTable[] = {
+ { "year", tMONTH_UNIT, 12 },
+ { "month", tMONTH_UNIT, 1 },
+ { "week", tSEC_UNIT, 7L * 24 * 60 * 60 },
+ { "day", tSEC_UNIT, 1L * 24 * 60 * 60 },
+ { "hour", tSEC_UNIT, 60 * 60 },
+ { "minute", tSEC_UNIT, 60 },
+ { "min", tSEC_UNIT, 60 },
+ { "second", tSEC_UNIT, 1 },
+ { "sec", tSEC_UNIT, 1 },
+};
+
+/* Timezone table. */
+static TABLE TimezoneTable[] = {
+ { "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */
+ { "ut", tZONE, HOUR( 0) }, /* Universal */
+ { "utc", tZONE, HOUR( 0) }, /* Universal Coordinated */
+ { "cut", tZONE, HOUR( 0) }, /* Coordinated Universal */
+ { "z", tZONE, HOUR( 0) }, /* Greenwich Mean */
+ { "wet", tZONE, HOUR( 0) }, /* Western European */
+ { "bst", tDAYZONE, HOUR( 0) }, /* British Summer */
+ { "nst", tZONE, HOUR(3)+30 }, /* Newfoundland Standard */
+ { "ndt", tDAYZONE, HOUR(3)+30 }, /* Newfoundland Daylight */
+ { "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 */
+ { "akst", tZONE, HOUR( 9) }, /* Alaska Standard */
+ { "akdt", tDAYZONE, HOUR( 9) }, /* Alaska Daylight */
+ { "hst", tZONE, HOUR(10) }, /* Hawaii Standard */
+ { "hast", tZONE, HOUR(10) }, /* Hawaii-Aleutian Standard */
+ { "hadt", tDAYZONE, HOUR(10) }, /* Hawaii-Aleutian Daylight */
+ { "ces", tDAYZONE, -HOUR(1) }, /* Central European Summer */
+ { "cest", tDAYZONE, -HOUR(1) }, /* Central European Summer */
+ { "mez", tZONE, -HOUR(1) }, /* Middle European */
+ { "mezt", tDAYZONE, -HOUR(1) }, /* Middle European Summer */
+ { "cet", tZONE, -HOUR(1) }, /* Central European */
+ { "met", tZONE, -HOUR(1) }, /* Middle European */
+ { "eet", tZONE, -HOUR(2) }, /* Eastern Europe */
+ { "msk", tZONE, -HOUR(3) }, /* Moscow Winter */
+ { "msd", tDAYZONE, -HOUR(3) }, /* Moscow Summer */
+ { "wast", tZONE, -HOUR(8) }, /* West Australian Standard */
+ { "wadt", tDAYZONE, -HOUR(8) }, /* West Australian Daylight */
+ { "hkt", tZONE, -HOUR(8) }, /* Hong Kong */
+ { "cct", tZONE, -HOUR(8) }, /* China Coast */
+ { "jst", tZONE, -HOUR(9) }, /* Japan Standard */
+ { "kst", tZONE, -HOUR(9) }, /* Korean Standard */
+ { "kdt", tZONE, -HOUR(9) }, /* Korean Daylight */
+ { "cast", tZONE, -(HOUR(9)+30) }, /* Central Australian Standard */
+ { "cadt", tDAYZONE, -(HOUR(9)+30) }, /* Central Australian Daylight */
+ { "east", tZONE, -HOUR(10) }, /* Eastern Australian Standard */
+ { "eadt", tDAYZONE, -HOUR(10) }, /* Eastern Australian Daylight */
+ { "nzst", tZONE, -HOUR(12) }, /* New Zealand Standard */
+ { "nzdt", tDAYZONE, -HOUR(12) }, /* New Zealand Daylight */
+
+ /* For completeness we include the following entries. */
+#if 0
+
+ /* Duplicate names. Either they conflict with a zone listed above
+ * (which is either more likely to be seen or just been in circulation
+ * longer), or they conflict with another zone in this section and
+ * we could not reasonably choose one over the other. */
+ { "fst", tZONE, HOUR( 2) }, /* Fernando De Noronha Standard */
+ { "fdt", tDAYZONE, HOUR( 2) }, /* Fernando De Noronha Daylight */
+ { "bst", tZONE, HOUR( 3) }, /* Brazil Standard */
+ { "est", tZONE, HOUR( 3) }, /* Eastern Standard (Brazil) */
+ { "edt", tDAYZONE, HOUR( 3) }, /* Eastern Daylight (Brazil) */
+ { "wst", tZONE, HOUR( 4) }, /* Western Standard (Brazil) */
+ { "wdt", tDAYZONE, HOUR( 4) }, /* Western Daylight (Brazil) */
+ { "cst", tZONE, HOUR( 5) }, /* Chile Standard */
+ { "cdt", tDAYZONE, HOUR( 5) }, /* Chile Daylight */
+ { "ast", tZONE, HOUR( 5) }, /* Acre Standard */
+ { "adt", tDAYZONE, HOUR( 5) }, /* Acre Daylight */
+ { "cst", tZONE, HOUR( 5) }, /* Cuba Standard */
+ { "cdt", tDAYZONE, HOUR( 5) }, /* Cuba Daylight */
+ { "est", tZONE, HOUR( 6) }, /* Easter Island Standard */
+ { "edt", tDAYZONE, HOUR( 6) }, /* Easter Island Daylight */
+ { "sst", tZONE, HOUR(11) }, /* Samoa Standard */
+ { "ist", tZONE, -HOUR(2) }, /* Israel Standard */
+ { "idt", tDAYZONE, -HOUR(2) }, /* Israel Daylight */
+ { "idt", tDAYZONE, -(HOUR(3)+30) }, /* Iran Daylight */
+ { "ist", tZONE, -(HOUR(3)+30) }, /* Iran Standard */
+ { "cst", tZONE, -HOUR(8) }, /* China Standard */
+ { "cdt", tDAYZONE, -HOUR(8) }, /* China Daylight */
+ { "sst", tZONE, -HOUR(8) }, /* Singapore Standard */
+
+ /* Dubious (e.g., not in Olson's TIMEZONE package) or obsolete. */
+ { "gst", tZONE, HOUR( 3) }, /* Greenland Standard */
+ { "wat", tZONE, -HOUR(1) }, /* West Africa */
+ { "at", tZONE, HOUR( 2) }, /* Azores */
+ { "gst", tZONE, -HOUR(10) }, /* Guam Standard */
+ { "nft", tZONE, HOUR(3)+30 }, /* Newfoundland */
+ { "idlw", tZONE, HOUR(12) }, /* International Date Line West */
+ { "mewt", tZONE, -HOUR(1) }, /* Middle European Winter */
+ { "mest", 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 */
+ { "bt", tZONE, -HOUR(3) }, /* Baghdad */
+ { "it", tZONE, -(HOUR(3)+30) }, /* Iran */
+ { "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */
+ { "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */
+ { "ist", tZONE, -(HOUR(5)+30) }, /* Indian Standard */
+ { "zp6", tZONE, -HOUR(6) }, /* USSR Zone 5 */
+ { "nst", tZONE, -HOUR(7) }, /* North Sumatra */
+ { "sst", tZONE, -HOUR(7) }, /* South Sumatra */
+ { "jt", tZONE, -(HOUR(7)+30) }, /* Java (3pm in Cronusland!) */
+ { "nzt", tZONE, -HOUR(12) }, /* New Zealand */
+ { "idle", tZONE, -HOUR(12) }, /* International Date Line East */
+ { "cat", tZONE, HOUR(10) }, /* -- expired 1967 */
+ { "nt", tZONE, HOUR(11) }, /* -- expired 1967 */
+ { "ahst", tZONE, HOUR(10) }, /* -- expired 1983 */
+ { "hdt", tDAYZONE, HOUR(10) }, /* -- expired 1986 */
+#endif /* 0 */
+};
+
+
+/* ARGSUSED */
+static void
+date_error(s)
+ char *s;
+{
+ /* NOTREACHED */
+}
+
+
+static time_t
+ToSeconds(Hours, Minutes, Seconds, Meridian)
+ time_t Hours;
+ time_t Minutes;
+ time_t Seconds;
+ MERIDIAN Meridian;
+{
+ if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 61)
+ return -1;
+ if (Meridian == MER24) {
+ if (Hours < 0 || Hours > 23)
+ return -1;
+ }
+ else {
+ if (Hours < 1 || Hours > 12)
+ return -1;
+ if (Hours == 12)
+ Hours = 0;
+ if (Meridian == MERpm)
+ Hours += 12;
+ }
+ return (Hours * 60L + Minutes) * 60L + Seconds;
+}
+
+
+static time_t
+Convert(Month, Day, Year, Hours, Minutes, Seconds, Meridian, dst)
+ time_t Month;
+ time_t Day;
+ time_t Year;
+ time_t Hours;
+ time_t Minutes;
+ time_t Seconds;
+ MERIDIAN Meridian;
+ DSTMODE dst;
+{
+ static int DaysNormal[13] = {
+ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+ };
+ static int DaysLeap[13] = {
+ 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+ };
+ static int LeapYears[] = {
+ 1972, 1976, 1980, 1984, 1988, 1992, 1996,
+ 2000, 2004, 2008, 2012, 2016, 2020, 2024, 2028, 2032, 2036
+ };
+ register int *yp;
+ register int *mp;
+ register time_t Julian;
+ register int i;
+ time_t tod;
+
+ if (Year < 0)
+ Year = -Year;
+ if (Year < 100)
+ Year += 1900;
+ if (Year < EPOCH)
+ Year += 100;
+ for (mp = DaysNormal, yp = LeapYears; yp < ENDOF(LeapYears); yp++)
+ if (Year == *yp) {
+ mp = DaysLeap;
+ break;
+ }
+ if (Year < EPOCH || Year > END_OF_TIME
+ || Month < 1 || Month > 12
+ /* NOSTRICT *//* conversion from long may lose accuracy */
+ || Day < 1 || Day > mp[(int)Month])
+ return -1;
+
+ Julian = Day - 1 + (Year - EPOCH) * 365;
+ for (yp = LeapYears; yp < ENDOF(LeapYears); yp++, Julian++)
+ if (Year <= *yp)
+ break;
+ for (i = 1; i < Month; i++)
+ Julian += *++mp;
+ Julian *= SECSPERDAY;
+ Julian += yyTimezone * 60L;
+ if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0)
+ return -1;
+ Julian += tod;
+ tod = Julian;
+ if (dst == DSTon || (dst == DSTmaybe && localtime(&tod)->tm_isdst))
+ Julian -= DST_OFFSET * 60L * 60L;
+ return Julian;
+}
+
+
+static time_t
+DSTcorrect(Start, Future)
+ time_t Start;
+ time_t Future;
+{
+ time_t StartDay;
+ time_t FutureDay;
+
+ StartDay = (localtime(&Start)->tm_hour + 1) % 24;
+ FutureDay = (localtime(&Future)->tm_hour + 1) % 24;
+ return (Future - Start) + (StartDay - FutureDay) * DST_OFFSET * 60L * 60L;
+}
+
+
+static time_t
+RelativeMonth(Start, RelMonth)
+ time_t Start;
+ time_t RelMonth;
+{
+ struct tm *tm;
+ time_t Month;
+ time_t Year;
+
+ tm = localtime(&Start);
+ Month = 12 * tm->tm_year + tm->tm_mon + RelMonth;
+ Year = Month / 12;
+ Month = Month % 12 + 1;
+ return DSTcorrect(Start,
+ Convert(Month, (time_t)tm->tm_mday, Year,
+ (time_t)tm->tm_hour, (time_t)tm->tm_min, (time_t)tm->tm_sec,
+ MER24, DSTmaybe));
+}
+
+
+static int
+LookupWord(buff, length)
+ char *buff;
+ register int length;
+{
+ register char *p;
+ register char *q;
+ register TABLE *tp;
+ register int c;
+
+ p = buff;
+ c = p[0];
+
+ /* See if we have an abbreviation for a month. */
+ if (length == 3 || (length == 4 && p[3] == '.'))
+ for (tp = MonthDayTable; tp < ENDOF(MonthDayTable); tp++) {
+ q = tp->name;
+ if (c == q[0] && p[1] == q[1] && p[2] == q[2]) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+ else
+ for (tp = MonthDayTable; tp < ENDOF(MonthDayTable); tp++)
+ if (c == tp->name[0] && strcmp(p, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+
+ /* Try for a timezone. */
+ for (tp = TimezoneTable; tp < ENDOF(TimezoneTable); tp++)
+ if (c == tp->name[0] && p[1] == tp->name[1]
+ && strcmp(p, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+
+ /* Try the units table. */
+ for (tp = UnitsTable; tp < ENDOF(UnitsTable); tp++)
+ if (c == tp->name[0] && strcmp(p, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+
+ /* Strip off any plural and try the units table again. */
+ if (--length > 0 && p[length] == 's') {
+ p[length] = '\0';
+ for (tp = UnitsTable; tp < ENDOF(UnitsTable); tp++)
+ if (c == tp->name[0] && strcmp(p, tp->name) == 0) {
+ p[length] = 's';
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ p[length] = 's';
+ }
+ length++;
+
+ /* Drop out any periods. */
+ for (p = buff, q = (char*)buff; *q; q++)
+ if (*q != '.')
+ *p++ = *q;
+ *p = '\0';
+
+ /* Try the meridians. */
+ if (buff[1] == 'm' && buff[2] == '\0') {
+ if (buff[0] == 'a') {
+ yylval.Meridian = MERam;
+ return tMERIDIAN;
+ }
+ if (buff[0] == 'p') {
+ yylval.Meridian = MERpm;
+ return tMERIDIAN;
+ }
+ }
+
+ /* If we saw any periods, try the timezones again. */
+ if (p - buff != length) {
+ c = buff[0];
+ for (p = buff, tp = TimezoneTable; tp < ENDOF(TimezoneTable); tp++)
+ if (c == tp->name[0] && p[1] == tp->name[1]
+ && strcmp(p, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+
+ /* Unknown word -- assume GMT timezone. */
+ yylval.Number = 0;
+ return tZONE;
+}
+
+
+int
+date_lex()
+{
+ register char c;
+ register char *p;
+ char buff[20];
+ register int sign;
+ register int i;
+ register int nesting;
+
+ for ( ; ; ) {
+ /* Get first character after the whitespace. */
+ for ( ; ; ) {
+ while (isspace(*yyInput))
+ yyInput++;
+ c = *yyInput;
+
+ /* Ignore RFC 822 comments, typically time zone names. */
+ if (c != LPAREN)
+ break;
+ for (nesting = 1; (c = *++yyInput) != RPAREN || --nesting; )
+ if (c == LPAREN)
+ nesting++;
+ else if (!IS7BIT(c) || c == '\0' || c == '\r'
+ || (c == '\\' && ((c = *++yyInput) == '\0' || !IS7BIT(c))))
+ /* Lexical error: bad comment. */
+ return '?';
+ yyInput++;
+ }
+
+ /* A number? */
+ if (isdigit(c) || c == '-' || c == '+') {
+ if (c == '-' || c == '+') {
+ sign = c == '-' ? -1 : 1;
+ yyInput++;
+ if (!isdigit(*yyInput))
+ /* Skip the plus or minus sign. */
+ continue;
+ }
+ else
+ sign = 0;
+ for (i = 0; (c = *yyInput++) != '\0' && isdigit(c); )
+ i = 10 * i + c - '0';
+ yyInput--;
+ yylval.Number = sign < 0 ? -i : i;
+ return sign ? tSNUMBER : tUNUMBER;
+ }
+
+ /* A word? */
+ if (isalpha(c)) {
+ for (p = buff; (c = *yyInput++) == '.' || isalpha(c); )
+ if (p < &buff[sizeof buff - 1])
+ *p++ = isupper(c) ? tolower(c) : c;
+ *p = '\0';
+ yyInput--;
+ return LookupWord(buff, p - buff);
+ }
+
+ return *yyInput++;
+ }
+}
+
+
+time_t
+parsedate(p)
+ char *p;
+{
+ extern int date_parse();
+ time_t Start;
+
+ yyInput = p;
+
+ yyYear = 0;
+ yyMonth = 0;
+ yyDay = 0;
+ yyTimezone = 0;
+ yyDSTmode = DSTmaybe;
+ yyHour = 0;
+ yyMinutes = 0;
+ yySeconds = 0;
+ yyMeridian = MER24;
+ yyRelSeconds = 0;
+ yyRelMonth = 0;
+ yyHaveDate = 0;
+ yyHaveRel = 0;
+ yyHaveTime = 0;
+
+ if (date_parse() || yyHaveTime > 1 || yyHaveDate > 1)
+ return -1;
+
+ if (yyHaveDate || yyHaveTime) {
+ Start = Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds,
+ yyMeridian, yyDSTmode);
+ if (Start < 0)
+ return -1;
+ }
+ else
+ return -1;
+
+ Start += yyRelSeconds;
+ if (yyRelMonth)
+ Start += RelativeMonth(Start, yyRelMonth);
+
+ /* Have to do *something* with a legitimate -1 so it's distinguishable
+ * from the error return value. (Alternately could set errno on error.) */
+ return Start == -1 ? 0 : Start;
+}
+
+
+#ifdef TEST
+
+#if YYDEBUG
+extern int yydebug;
+#endif /* YYDEBUG */
+
+/* ARGSUSED */
+int
+main(ac, av)
+ int ac;
+ char *av[];
+{
+ char buff[128];
+ time_t d;
+
+#if YYDEBUG
+ yydebug = 1;
+#endif /* YYDEBUG */
+
+ (void)printf("Enter date, or blank line to exit.\n\t> ");
+ for ( ; ; ) {
+ (void)printf("\t> ");
+ (void)fflush(stdout);
+ if (gets(buff) == NULL || buff[0] == '\n')
+ break;
+#if YYDEBUG
+ if (strcmp(buff, "yydebug") == 0) {
+ yydebug = !yydebug;
+ printf("yydebug = %s\n", yydebug ? "on" : "off");
+ continue;
+ }
+#endif /* YYDEBUG */
+ d = parsedate(buff, (TIMEINFO *)NULL);
+ if (d == -1)
+ (void)printf("Bad format - couldn't convert.\n");
+ else
+ (void)printf("%s", ctime(&d));
+ }
+
+ exit(0);
+ /* NOTREACHED */
+}
+#endif /* TEST */
projects / citadel.git / commitdiff