+++ /dev/null
-/*$Log: datelex.c,v $
-/*Revision 1.2 2002-09-28 06:58:45 arjen
-/*Bugfix: conversion of an empty string to a date or hour object
-/*now makes the values of such an object 0 (null) instead of giving
-/*a segmentation fault.
-/*The class UTC combines the date and hour classes. The most basic
-/*functions of the UTC class are now implemented.
-/*These include constructors and conversion to and from String objects.
-/*New functions: date::proper(), hour::proper() and UTC::proper().
-/*Return true if the object holds a proper clock time and/or calendar
-/*date; false if at least one value is out of range.
-/*
- *Revision 1.1 2002/07/25 08:01:26 arjen
- *First checkin, AXE release 0.2
- *
- * Revision 1.1 84/09/01 15:01:14 wales
- * Initial revision
- *
- * Copyright (c) 1984 by Richard B. Wales
- *
- * Purpose:
- *
- * Lexical analyzer for "parsedate" routine. This lexer was orig-
- * inally written in LEX, but rewriting it as an ad-hoc routine
- * resulted in an enormous savings in space and a significant
- * increase in speed.
- *
- * Usage:
- *
- * Called as needed by the YACC parser ("dateyacc.c"). Not intended
- * to be called from any other routine.
- *
- * Notes:
- *
- * Global contents:
- *
- * int yylex ()
- * Returns the token number (from the YACC grammar) of the next
- * token in the input string pointed to by the global variable
- * "yyinbuf". The global variable "yylval" is set to the lexi-
- * cal value (if any) of the token. "yyinbuf" is set to point
- * to the first character in the input string which is not a
- * part of the token just recognized.
- *
- * Local contents:
- *
- * struct wordtable *find_word (word) char *word;
- * Returns a pointer to the entry in the "wordtable" array cor-
- * responding to the string "word". If "word" is not found, the
- * returned value is NULL.
- */
-
-/* ajs
- * ajs Code added 850314 to allow NUM991231 and NUM99991231.
- * ajs All added/changed lines contain "ajs" for easy searching.
- * ajs */
-
-/* AJB, Aug 28 1999: Added month names in Dutch */
-
-#ifdef RCSIDENT
-static char rcsident[] = "$Header: /cvsroot/lib/AXE/src/datelex.c,v 1.2 2002-09-28 06:58:45 arjen Exp $";
-#endif /* RCSIDENT */
-
-#include <stdio.h>
-#include "dateyacc.h"
-#include "parsedate.h"
-
-/* pointer to the input string */
-char *yyinbuf;
-
-/* "answer" structure */
-struct parseddate yyans;
-
-/* Binary-search word table.
- * Entries must be sorted in ascending order on "text" value, and the
- * total number of entries must be one less than a power of 2. "Filler"
- * entries (with "token" values of -1) are inserted at the beginning and
- * end of the table to pad it as necessary.
- */
-#define WORDTABLE_SIZE 127 /* MUST be one less than power of 2 */
-#define MAX_WORD_LENGTH 20 /* used to weed out overly long words
- * in "yylex". Must be at least as long
- * as the longest word in "wordtable",
- * but may be longer.
- */
-struct wordtable
- { char *text;
- int token;
- int lexval;
- } wordtable[WORDTABLE_SIZE] =
- {/* text token lexval */
- "", -1, 0,
- "", -1, 0,
- "", -1, 0,
- "", -1, 0,
- "", -1, 0,
- "", -1, 0,
- "", -1, 0,
- "", -1, 0,
- "", -1, 0,
- "", -1, 0,
- "", -1, 0,
- "A", STD_ZONE, 60, /* UTC+1h */
- "ACSST", DST_ZONE, 630, /* Cent. Australia */
- "ACST", STD_ZONE, 570, /* Cent. Australia */
- "ADT", DST_ZONE, -180, /* Atlantic (Canada) */
- "AESST", DST_ZONE, 660, /* E. Australia */
- "AEST", STD_ZONE, 600, /* E. Australia */
- "AM", AMPM, 0,
- "APR", MONTH_NAME, 4,
- "APRIL", MONTH_NAME, 4,
- "AST", STD_ZONE, -240, /* Atlantic (Canada) */
- "AT", 0, 0, /* "at" (throwaway) */
- "AUG", MONTH_NAME, 8,
- "AUGUST", MONTH_NAME, 8,
- "AWSST", DST_ZONE, 540, /* W. Australia */
- "AWST", STD_ZONE, 480, /* W. Australia */
- "B", STD_ZONE, 120, /* UTC+2h */
- "BST", DST_ZONE, 60, /* Great Britain */
- "C", STD_ZONE, 180, /* UTC+3h */
- "CDT", DST_ZONE, -300,
- "CST", STD_ZONE, -360,
- "D", STD_ZONE, 240, /* UTC+4h */
- "DEC", MONTH_NAME, 12,
- "DECEMBER", MONTH_NAME, 12,
- "DST", DST_SUFFIX, 0,
- "E", STD_ZONE, 300, /* UTC+5h */
- "EDT", DST_ZONE, -240,
- "EET", STD_ZONE, 120, /* Eastern Europe */
- "EETDST", DST_ZONE, 180, /* Eastern Europe */
- "EST", STD_ZONE, -300,
- "F", STD_ZONE, 360, /* UTC+6h */
- "FEB", MONTH_NAME, 2,
- "FEBRUARY", MONTH_NAME, 2,
- "FRI", DAY_NAME, 5,
- "FRIDAY", DAY_NAME, 5,
- "G", STD_ZONE, 420, /* UTC+7h */
- "GMT", STD_ZONE, 0,
- "H", STD_ZONE, 480, /* UTC+8h */
- "HDT", DST_ZONE, -540, /* Hawaii/Alaska */
- "HST", STD_ZONE, -600, /* Hawaii/Alaska */
- "I", STD_ZONE, 540, /* UTC+9h */
- "IST", STD_ZONE, 120, /* Israel */
- "JAN", MONTH_NAME, 1,
- "JANUARY", MONTH_NAME, 1,
- "JUL", MONTH_NAME, 7,
- "JULY", MONTH_NAME, 7,
- "JUN", MONTH_NAME, 6,
- "JUNE", MONTH_NAME, 6,
- "K", STD_ZONE, 600, /* UTC+10h */
- "L", STD_ZONE, 660, /* UTC+11h */
- "M", STD_ZONE, 720, /* UTC+12h */
- "MAR", MONTH_NAME, 3,
- "MARCH", MONTH_NAME, 3,
- "MAY", MONTH_NAME, 5,
- "MDT", DST_ZONE, -360,
- "MEI", MONTH_NAME, 5,
- "MET", STD_ZONE, 60, /* Central Europe */
- "METDST", DST_ZONE, 120, /* Central Europe */
- "MON", DAY_NAME, 1,
- "MONDAY", DAY_NAME, 1,
- "MRT", MONTH_NAME, 3,
- "MST", STD_ZONE, -420,
- "N", STD_ZONE, -60, /* UTC-1h */
- "NDT", DST_ZONE, -150, /* Nfld. (Canada) */
- "NOV", MONTH_NAME, 11,
- "NOVEMBER", MONTH_NAME, 11,
- "NST", STD_ZONE, -210, /* Nfld. (Canada) */
- "O", STD_ZONE, -120, /* UTC-2h */
- "OCT", MONTH_NAME, 10,
- "OCTOBER", MONTH_NAME, 10,
- "OKT", MONTH_NAME, 10,
- "ON", 0, 0, /* "on" (throwaway) */
- "P", STD_ZONE, -180, /* UTC-3h */
- "PDT", DST_ZONE, -420,
- "PM", AMPM, 12,
- "PST", STD_ZONE, -480,
- "Q", STD_ZONE, -240, /* UTC-4h */
- "R", STD_ZONE, -300, /* UTC-5h */
- "S", STD_ZONE, -360, /* UTC-6h */
- "SAT", DAY_NAME, 6,
- "SATURDAY", DAY_NAME, 6,
- "SEP", MONTH_NAME, 9,
- "SEPT", MONTH_NAME, 9,
- "SEPTEMBER", MONTH_NAME, 9,
- "SUN", DAY_NAME, 0,
- "SUNDAY", DAY_NAME, 0,
- "T", STD_ZONE, -420, /* UTC-7h */
- "THU", DAY_NAME, 4,
- "THUR", DAY_NAME, 4,
- "THURS", DAY_NAME, 4,
- "THURSDAY", DAY_NAME, 4,
- "TUE", DAY_NAME, 2,
- "TUES", DAY_NAME, 2,
- "TUESDAY", DAY_NAME, 2,
- "U", STD_ZONE, -480, /* UTC-8h */
- "UT", STD_ZONE, 0,
- "UTC", STD_ZONE, 0,
- "V", STD_ZONE, -540, /* UTC-9h */
- "W", STD_ZONE, -600, /* UTC-10h */
- "WED", DAY_NAME, 3,
- "WEDNESDAY", DAY_NAME, 3,
- "WEDS", DAY_NAME, 3,
- "WET", STD_ZONE, 0, /* Western Europe */
- "WETDST", DST_ZONE, 60, /* Western Europe */
- "X", STD_ZONE, -660, /* UTC-11h */
- "Y", STD_ZONE, -720, /* UTC-12h */
- "YDT", DST_ZONE, -480, /* Yukon */
- "YST", STD_ZONE, -540, /* Yukon */
- "Z", STD_ZONE, 0, /* UTC */
- "\177", -1, 0,
- "\177", -1, 0,
- "\177", -1, 0,
- "\177", -1, 0,
- "\177", -1, 0,
- "\177", -1, 0,
- "\177", -1, 0,
- "\177", -1, 0,
- };
-static struct wordtable *find_word();
-
-/* int yylex ()
- * Return the next token for the YACC parser.
- */
-int
-yylex ()
-{ static char buffer[MAX_WORD_LENGTH+1];
- register char *c, *d;
- register struct wordtable *wt;
- register int num, ndgts;
-
- restart:
- /* We will return here if an invalid input token is detected. */
- c = buffer; d = yyinbuf;
-
- /* Skip over blanks, tabs, commas, and parentheses. */
- do
- {
- *c = *d++;
- }
- while (*c != '\0' && (*c == ' ' || *c == '\t' || *c == ','
- || *c == '(' || *c == ')'));
-
- /* A zero (null) byte signals the end of the input. */
- if (*c == 0)
- { yyinbuf = --d; /* stay put on the null */
- return 0;
- }
-
- /* Process a word (looking it up in "wordtable"). */
- if ((*c >= 'A' && *c <= 'Z') || (*c >= 'a' && *c <= 'z'))
- { if (*c >= 'a' && *c <= 'z') *c += 'A' - 'a';
- while (c < buffer + MAX_WORD_LENGTH
- && ((*d >= 'A' && *d <= 'Z')
- || (*d >= 'a' && *d <= 'z')))
- { *++c = *d++;
- if (*c >= 'a' && *c <= 'z') *c += 'A' - 'a';
- }
- if ((*d >= 'A' && *d <= 'Z') || (*d >= 'a' && *d <= 'z'))
- { /* Word is too long (over MAX_WORD_LENGTH characters). */
- do { d++; } while ((*d >= 'A' && *d <= 'Z')
- || (*d >= 'a' && *d <= 'z'));
- yyinbuf = d;
- goto error;
- }
- *++c = 0; yyinbuf = d;
- if ((wt = find_word (buffer)) == NULL) goto error;
- if (wt->token == 0) goto restart; /* ignore this word */
- yylval.IntVal = wt->lexval;
- return wt->token;
- }
-
- /* Process a number. */
- if (*c >= '0' && *c <= '9')
- { num = *c - '0'; ndgts = 1;
- for (ndgts = 1; ndgts < 8 && *d >= '0' && *d <= '9'; ndgts++) /* ajs */
- num = 10*num + (*d++ - '0');
- if (*d >= '0' && *d <= '9')
- { /* Number is too long (over 8 digits). */ /* ajs */
- do { d++; } while (*d >= '0' && *d <= '9');
- yyinbuf = d;
- goto error;
- }
- yyinbuf = d;
- yylval.IntVal = num;
- switch (ndgts)
- { case 1: return NUM9;
- case 2: if (num <= 23) return NUM23;
- if (num <= 59) return NUM59;
- /*otherwise*/ return NUM99;
- case 3:
- case 4: if (num/100 <= 23 && num%100 <= 59) return NUM2359;
- /*otherwise*/ return NUM9999;
- case 5:
- case 6: if (num/10000 <= 23
- && (num%10000)/100 <= 59
- && num%100 <= 59)
- return NUM235959;
- if ((((num % 10000) / 100) <= 12) /* ajs */
- && ((num % 100) <= 31)) /* ajs */
- return NUM991231; /* ajs */
- goto error;
- case 8: if ((((num % 10000) / 100) <= 12) /* ajs */
- && ((num % 100) <= 31)) /* ajs */
- return NUM99991231; /* ajs */
- goto error; /* ajs */
- default: goto error;
- } }
-
- /* Pass back the following delimiter tokens verbatim.. */
- if (*c == '-' || *c == '+' || *c == '/' || *c == ':' || *c == '.')
- { yyinbuf = d;
- return *c;
- }
-
- error:
- /* An unidentified character was found in the input. */
- yyinbuf = d;
- if (yyans.error == NULL) yyans.error = yyinbuf;
- goto restart;
-}
-
-/* struct wordtable *find_word (word) char *word;
- * Look up a word in the "wordtable" array via a binary search.
- */
-static
-struct wordtable *
-find_word (word)
- register char *word;
-{ register int low, mid, high;
- register int comparison;
-
- low = -1;
- high = WORDTABLE_SIZE;
- while (low+1 < high)
- { mid = (low + high) / 2;
- comparison = strcmp (wordtable[mid].text, word);
- if (comparison == 0) return wordtable+mid;
- if (comparison > 0) high = mid;
- else low = mid;
- }
- return NULL;
-}
projects / AXE.git / blobdiff