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/*******************************************************************************
* The Elm Mail System - $Revision: 1.1.1.1 $ $State: Exp $
*
* Copyright (c) 1988-1995 USENET Community Trust
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* Bill Pemberton, Elm Coordinator
* flash@virginia.edu
*
*******************************************************************************
* $Log: parsarpdat.c,v $
* Revision 1.1.1.1 2001/11/21 18:25:34 ludo
* Imported Sources
*
* Revision 1.1.1.1 2001/09/28 13:06:56 ludo
* Import of sources
*
* Revision 1.1.1.1 2001/07/28 00:06:35 ludovic
* Imported Sources
*
* Revision 1.2 1995/09/29 17:41:24 wfp5p
* Alpha 8 (Chip's big changes)
*
* Revision 1.1.1.1 1995/04/19 20:38:33 wfp5p
* Initial import of elm 2.4 PL0 as base for elm 2.5.
*
******************************************************************************/
#include <Pantomime/elm_defs.h>
/*
Quoting from RFC 822:
5. DATE AND TIME SPECIFICATION
5.1. SYNTAX
date-time = [ day "," ] date time ; dd mm yy
; hh:mm:ss zzz
day = "Mon" / "Tue" / "Wed" / "Thu"
/ "Fri" / "Sat" / "Sun"
date = 1*2DIGIT month 2DIGIT ; day month year
; e.g. 20 Jun 82
month = "Jan" / "Feb" / "Mar" / "Apr"
/ "May" / "Jun" / "Jul" / "Aug"
/ "Sep" / "Oct" / "Nov" / "Dec"
time = hour zone ; ANSI and Military
hour = 2DIGIT ":" 2DIGIT [":" 2DIGIT]
; 00:00:00 - 23:59:59
zone = "UT" / "GMT" ; Universal Time
; North American : UT
/ "EST" / "EDT" ; Eastern: - 5/ - 4
/ "CST" / "CDT" ; Central: - 6/ - 5
/ "MST" / "MDT" ; Mountain: - 7/ - 6
/ "PST" / "PDT" ; Pacific: - 8/ - 7
/ 1ALPHA ; Military: Z = UT;
; A:-1; (J not used)
; M:-12; N:+1; Y:+12
/ ( ("+" / "-") 4DIGIT ) ; Local differential
; hours+min. (HHMM)
*/
int parse_arpa_date(datestr, entry)
const char *datestr;
struct header_rec *entry;
{
/*
* Parse a date field in either RFC-822 or Unix date(1) format.
* We will fill in the "time_zone", "tz_offset", and "time_sent"
* parts of the "entry" structure. Return TRUE on success, FALSE
* on failure.
*/
char field[STRING], save_tz[STRING], *str;
int month, day, year, hours, mins, secs, tz, len, i;
/*
* Since this is an RFC-822 field, there might be parenthetical
* comments. Yank them out. Note that strip_parens() returns
* a pointer to static data.
*/
str = strip_parens(datestr);
/*
* The first field is an optional day of the week. If it exists
* it is supposed to have a trailing comma by RFC-822, but we won't
* complain if it doesn't. If the date string was generated by
* the Unix date(1) command then it won't have the comma. We don't
* do anything with this information, just skip over it if it exists.
*/
if ((len = get_word(str, 0, field, sizeof(field))) < 0)
goto failed;
if (cvt_dayname_to_daynum(field, &i))
str += len;
/*
* Peek at the next character to determine what format to
* parse the rest of the line as.
*/
while (isspace(*str))
++str;
if (!isdigit(*str)) {
/*
* Parse the line in Unix date(1) format. The syntax is:
*
* month day hh:mm:ss [tz] year
*
* e.g. "Jun 21 06:45:44 CDT 1989". The timezone is optional.
*/
//dprint(7, (stderr,"parse_arpa_date parsing \"%s\" in time(1) format\n", str));
/* <month> */
if ((len = get_word(str, 0, field, sizeof(field))) < 0 ||
!cvt_monthname_to_monthnum(field, &month))
goto failed;
str += len;
/* <day> */
if ((len = get_word(str, 0, field, sizeof(field))) < 0 ||
(day = atonum(field)) < 0)
goto failed;
str += len;
/* <hh:mm:ss> */
if ((len = get_word(str, 0, field, sizeof(field))) < 0 ||
!cvt_timestr_to_hhmmss(field, &hours, &mins, &secs))
goto failed;
str += len;
/* optional <tz> */
save_tz[0] = save_tz[1] = '\0';
tz = 0;
while ((len = get_word(str, 0, field, sizeof(field))) > 0 &&
cvt_timezone_to_offset(field, &i)) {
(void) strcat(save_tz, " ");
(void) strcat(save_tz, field);
tz += i;
str += len;
}
/* <year> */
if ((len = get_word(str, 0, field, sizeof(field))) < 0 ||
(year = atonum(field)) < 0)
goto failed;
str += len;
/* there might be more...but we ignore it */
} else {
/*
* Parse the line in RFC-822 format. The syntax is:
*
* day month year hh:mm:ss zone
*
* e.g. "17 Nov 92 23:34:25 CST".
*/
//dprint(7, (stderr,"parse_arpa_date parsing \"%s\" in RFC-822 format\n", str));
/* <day> */
if ((len = get_word(str, 0, field, sizeof(field))) < 0 ||
(day = atonum(field)) < 0)
goto failed;
str += len;
/* <month> */
if ((len = get_word(str, 0, field, sizeof(field))) < 0 ||
!cvt_monthname_to_monthnum(field, &month))
goto failed;
str += len;
/* <year> */
if ((len = get_word(str, 0, field, sizeof(field))) < 0 ||
!cvt_yearstr_to_yearnum(field, &year))
goto failed;
str += len;
/* <hh:mm:ss> */
if ((len = get_word(str, 0, field, sizeof(field))) < 0 ||
!cvt_timestr_to_hhmmss(field, &hours, &mins, &secs))
goto failed;
str += len;
/* <tz> - silently ignore bogus or missing timezones */
save_tz[0] = save_tz[1] = '\0';
tz = 0;
while ((len = get_word(str, 0, field, sizeof(field))) > 0 &&
cvt_timezone_to_offset(field, &i)) {
(void) strcat(save_tz, " ");
(void) strcat(save_tz, field);
tz += i;
str += len;
}
/* there might be more...but we ignore it */
}
strfcpy(entry->time_zone, save_tz+1, sizeof(entry->time_zone));
entry->tz_offset = tz*60;
entry->time_sent = make_gmttime(year, month, day, hours, mins-tz, secs);
//dprint(7, (stderr, " year=%d month=%d day=%d\n", year, month, day));
//dprint(7, (stderr, " hours=%d mins=%d secs=%d tz=%d\n",
// hours, mins, secs, tz));
//dprint(7, (stderr, " return success\n"));
return TRUE;
failed:
//dprint(4, (stderr, "parse_arpa_date failed at \"%s\"\n",
// (len <= 0 ? "<premature eol>" : field)));
return FALSE;
}
//int debug = 9999;
/* main() */
/* { */
/* struct header_rec hdr; */
/* char buf[1024]; */
/* while (gets(buf) != NULL) { */
/* if (!parse_arpa_date(buf, &hdr)) */
/* fprintf(stderr, "FAIL %s\n", buf); */
/* else { */
/* fprintf(stderr, "OK %s\n", buf); */
/* fprintf(stderr, "time_zone=%s tz_offset=%d time_sent=%ld\n", */
/* hdr.time_zone, hdr.tz_offset, hdr.time_sent); */
/* } */
/* putc('\n', stderr); */
/* } */
/* exit(0); */
/* } */
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