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author | nobody <nobody@localhost> | 2002-05-16 00:19:25 +0800 |
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committer | nobody <nobody@localhost> | 2002-05-16 00:19:25 +0800 |
commit | 7879d3fe0478817b67bde873cb64ac028a2b2972 (patch) | |
tree | 9a14849dd3a40bd1667b88d689e2aa7d58d08bce /camel/broken-date-parser.c | |
parent | 74f4231f4eb650f0243ff39ab5a085b1df4f7697 (diff) | |
download | gsoc2013-evolution-GDM2_2_4_0_11.tar.gz gsoc2013-evolution-GDM2_2_4_0_11.tar.zst gsoc2013-evolution-GDM2_2_4_0_11.zip |
This commit was manufactured by cvs2svn to create tagGDM2_2_4_0_11
'GDM2_2_4_0_11'.
svn path=/tags/GDM2_2_4_0_11/; revision=16813
Diffstat (limited to 'camel/broken-date-parser.c')
-rw-r--r-- | camel/broken-date-parser.c | 521 |
1 files changed, 0 insertions, 521 deletions
diff --git a/camel/broken-date-parser.c b/camel/broken-date-parser.c deleted file mode 100644 index 7bcff0ffd4..0000000000 --- a/camel/broken-date-parser.c +++ /dev/null @@ -1,521 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* - * Authors: Jeffrey Stedfast <fejj@ximian.com> - * - * Copyright 2000 Ximian, Inc. (www.ximian.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * 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., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - * - */ - - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <glib.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <ctype.h> -#include <sys/time.h> -#include <time.h> - -#include "broken-date-parser.h" - -#define d(x) x - -#define NUMERIC_CHARS "1234567890" -#define WEEKDAY_CHARS "SundayMondayTuesdayWednesdayThursdayFridaySaturday" -#define MONTH_CHARS "JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember" -#define TIMEZONE_ALPHA_CHARS "UTCGMTESTEDTCSTCDTMSTPSTPDTZAMNY()" -#define TIMEZONE_NUMERIC_CHARS "-+1234567890" -#define TIME_CHARS "1234567890:" - -#define DATE_TOKEN_NON_NUMERIC (1 << 0) -#define DATE_TOKEN_NON_WEEKDAY (1 << 1) -#define DATE_TOKEN_NON_MONTH (1 << 2) -#define DATE_TOKEN_NON_TIME (1 << 3) -#define DATE_TOKEN_HAS_COLON (1 << 4) -#define DATE_TOKEN_NON_TIMEZONE_ALPHA (1 << 5) -#define DATE_TOKEN_NON_TIMEZONE_NUMERIC (1 << 6) -#define DATE_TOKEN_HAS_SIGN (1 << 7) - -static unsigned char datetok_table[256] = { - 128,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111, - 111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111, - 111,111,111,111,111,111,111,111, 79, 79,111,175,111,175,111,111, - 38, 38, 38, 38, 38, 38, 38, 38, 38, 38,119,111,111,111,111,111, - 111, 75,111, 79, 75, 79,105, 79,111,111,107,111,111, 73, 75,107, - 79,111,111, 73, 77, 79,111,109,111, 79, 79,111,111,111,111,111, - 111,105,107,107,109,105,111,107,105,105,111,111,107,107,105,105, - 107,111,105,105,105,105,107,111,111,105,111,111,111,111,111,111, - 111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111, - 111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111, - 111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111, - 111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111, - 111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111, - 111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111, - 111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111, - 111,111,111,111,111,111,111,111,111,111,111,111,111,111,111,111, -}; - -/* hrm, is there a library for this shit? */ -static struct { - char *name; - int offset; -} tz_offsets [] = { - { "UT", 0 }, - { "GMT", 0 }, - { "EST", -500 }, /* these are all US timezones. bloody yanks */ - { "EDT", -400 }, - { "CST", -600 }, - { "CDT", -500 }, - { "MST", -700 }, - { "MDT", -600 }, - { "PST", -800 }, - { "PDT", -700 }, - { "Z", 0 }, - { "A", -100 }, - { "M", -1200 }, - { "N", 100 }, - { "Y", 1200 }, -}; - -static char *tm_months[] = { - "Jan", "Feb", "Mar", "Apr", "May", "Jun", - "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" -}; - -static char *tm_days[] = { - "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" -}; - - -struct _date_token { - struct _date_token *next; - const unsigned char *start; - unsigned int len; - unsigned int mask; -}; - -/* This is where it gets ugly... */ -static struct _date_token * -datetok (const char *date) -{ - struct _date_token *tokens = NULL, *token, *tail = (struct _date_token *) &tokens; - const unsigned char *start, *end; - unsigned int mask; - - start = date; - while (*start) { - /* kill leading whitespace */ - for ( ; *start && isspace ((int) *start); start++); - - mask = 0; - - /* find the end of this token */ - for (end = start; *end && !strchr ("-/,\t\r\n ", *end); end++) { - mask |= datetok_table[*end]; - } - - if (end != start) { - token = g_malloc (sizeof (struct _date_token)); - token->next = NULL; - token->start = start; - token->len = end - start; - token->mask = mask; - - tail->next = token; - tail = token; - } - - if (*end) - start = end + 1; - else - break; - } - - return tokens; -} - -static int -decode_int (const unsigned char *in, unsigned int inlen) -{ - register const unsigned char *inptr; - const unsigned char *inend; - int sign = 1, val = 0; - - inptr = in; - inend = in + inlen; - - if (*inptr == '-') { - sign = -1; - inptr++; - } else if (*inptr == '+') - inptr++; - - for ( ; inptr < inend; inptr++) { - if (!isdigit ((int) *inptr)) - return -1; - else - val = (val * 10) + (*inptr - '0'); - } - - val *= sign; - - return val; -} - -static int -get_wday (const unsigned char *in, unsigned int inlen) -{ - int wday; - - if (inlen < 3) - return -1; - - for (wday = 0; wday < 7; wday++) - if (!strncasecmp (in, tm_days[wday], 3)) - return wday; - - return -1; /* unknown week day */ -} - -static int -get_mday (const unsigned char *in, unsigned int inlen) -{ - int mday; - - mday = decode_int (in, inlen); - - if (mday < 0 || mday > 31) - mday = -1; - - return mday; -} - -static int -get_month (const unsigned char *in, unsigned int inlen) -{ - int i; - - if (inlen < 3) - return -1; - - for (i = 0; i < 12; i++) - if (!strncasecmp (in, tm_months[i], 3)) - return i; - - return -1; /* unknown month */ -} - -static int -get_year (const unsigned char *in, unsigned int inlen) -{ - int year; - - year = decode_int (in, inlen); - if (year == -1) - return -1; - - if (year < 100) - year += (year < 70) ? 2000 : 1900; - - if (year < 1969) - return -1; - - return year; -} - -static gboolean -get_time (const unsigned char *in, unsigned int inlen, int *hour, int *min, int *sec) -{ - register const unsigned char *inptr; - const unsigned char *inend; - int *val, colons = 0; - - *hour = *min = *sec = 0; - - inend = in + inlen; - val = hour; - for (inptr = in; inptr < inend; inptr++) { - if (*inptr == ':') { - colons++; - switch (colons) { - case 1: - val = min; - break; - case 2: - val = sec; - break; - default: - return FALSE; - } - } else if (!isdigit ((int) *inptr)) - return FALSE; - else - *val = (*val * 10) + (*inptr - '0'); - } - - return TRUE; -} - -static int -get_tzone (struct _date_token **token) -{ - int i; - - for (i = 0; *token && i < 2; *token = (*token)->next, i++) { - const unsigned char *inptr = (*token)->start; - unsigned int inlen = (*token)->len; - - if (*inptr == '+' || *inptr == '-') { - return decode_int (inptr, inlen); - } else { - int t; - - if (*inptr == '(') - inptr++; - - for (t = 0; t < 15; t++) { - unsigned int len = MIN (strlen (tz_offsets[t].name), inlen - 1); - - if (!strncmp (inptr, tz_offsets[t].name, len)) - return tz_offsets[t].offset; - } - } - } - - return -1; -} - -/* This is where things get interesting... ;-) */ - -#define date_token_mask(t) (((struct _date_token *) t)->mask) -#define is_numeric(t) ((date_token_mask (t) & DATE_TOKEN_NON_NUMERIC) == 0) -#define is_weekday(t) ((date_token_mask (t) & DATE_TOKEN_NON_WEEKDAY) == 0) -#define is_month(t) ((date_token_mask (t) & DATE_TOKEN_NON_MONTH) == 0) -#define is_time(t) (((date_token_mask (t) & DATE_TOKEN_NON_TIME) == 0) && (date_token_mask (t) & DATE_TOKEN_HAS_COLON)) -#define is_tzone_alpha(t) ((date_token_mask (t) & DATE_TOKEN_NON_TIMEZONE_ALPHA) == 0) -#define is_tzone_numeric(t) (((date_token_mask (t) & DATE_TOKEN_NON_TIMEZONE_NUMERIC) == 0) && (date_token_mask (t) & DATE_TOKEN_HAS_SIGN)) -#define is_tzone(t) (is_tzone_alpha (t) || is_tzone_numeric (t)) - -static time_t -decode_broken_date (struct _date_token *tokens, int *tzone) -{ - gboolean got_wday, got_month, got_tzone; - int hour, min, sec, offset, n; - struct _date_token *token; - struct tm tm; - time_t time; - - memset ((void *) &tm, 0, sizeof (struct tm)); - got_wday = got_month = got_tzone = FALSE; - offset = 0; - - token = tokens; - while (token) { - if (is_weekday (token) && !got_wday) { - if ((n = get_wday (token->start, token->len)) != -1) { - d(printf ("weekday; ")); - got_wday = TRUE; - tm.tm_wday = n; - goto next_token; - } - } - - if (is_month (token) && !got_month) { - if ((n = get_month (token->start, token->len)) != -1) { - d(printf ("month; ")); - got_month = TRUE; - tm.tm_mon = n; - goto next_token; - } - } - - if (is_time (token) && !tm.tm_hour && !tm.tm_min && !tm.tm_sec) { - if (get_time (token->start, token->len, &hour, &min, &sec)) { - d(printf ("time; ")); - tm.tm_hour = hour; - tm.tm_min = min; - tm.tm_sec = sec; - goto next_token; - } - } - - if (is_tzone (token) && !got_tzone) { - struct _date_token *t = token; - - if ((n = get_tzone (&t)) != -1) { - d(printf ("tzone; ")); - got_tzone = TRUE; - offset = n; - goto next_token; - } - } - - if (is_numeric (token)) { - if (token->len == 4 && !tm.tm_year) { - if ((n = get_year (token->start, token->len)) != -1) { - d(printf ("year; ")); - tm.tm_year = n - 1900; - goto next_token; - } - } else { - if (!got_month && !got_wday && token->next && is_numeric (token->next)) { - d(printf ("mon; ")); - n = decode_int (token->start, token->len); - got_month = TRUE; - tm.tm_mon = n - 1; - goto next_token; - } else if (!tm.tm_mday && (n = get_mday (token->start, token->len)) != -1) { - d(printf ("mday; ")); - tm.tm_mday = n; - goto next_token; - } else if (!tm.tm_year) { - d(printf ("2-digit year; ")); - n = get_year (token->start, token->len); - tm.tm_year = n - 1900; - goto next_token; - } - } - } - - d(printf ("???; ")); - - next_token: - - token = token->next; - } - - d(printf ("\n")); - - time = mktime (&tm); -#if defined (HAVE_TIMEZONE) - time -= timezone; -#elif defined (HAVE_TM_GMTOFF) - time += tm.tm_gmtoff; -#else -#error Neither HAVE_TIMEZONE nor HAVE_TM_GMTOFF defined. Rerun autoheader, autoconf, etc. -#endif - - /* t is now GMT of the time we want, but not offset by the timezone ... */ - - /* this should convert the time to the GMT equiv time */ - time -= ((offset / 100) * 60 * 60) + (offset % 100) * 60; - - if (tzone) - *tzone = offset; - - return time; -} - - -/** - * parse_broken_date: - * @datestr: input date string - * @saveoffset: - * - * Decodes the rfc822/broken date string and saves the GMT offset into - * @saveoffset if non-NULL. - * - * Returns the time_t representation of the date string specified by - * @in. If 'saveoffset' is non-NULL, the value of the timezone offset - * will be stored. - **/ -time_t -parse_broken_date (const char *datestr, int *saveoffset) -{ - struct _date_token *token, *tokens; - time_t date; - - tokens = datetok (datestr); - - date = decode_broken_date (tokens, saveoffset); - - /* cleanup */ - while (tokens) { - token = tokens; - tokens = tokens->next; - g_free (token); - } - - return date; -} - - - - - -#ifdef DATETOK_STANDALONE - -static void -table_init () -{ - int i; - - memset (datetok_table, 0, sizeof (datetok_table)); - - for (i = 0; i < 256; i++) { - if (!strchr (NUMERIC_CHARS, i)) - datetok_table[i] |= DATE_TOKEN_NON_NUMERIC; - - if (!strchr (WEEKDAY_CHARS, i)) - datetok_table[i] |= DATE_TOKEN_NON_WEEKDAY; - - if (!strchr (MONTH_CHARS, i)) - datetok_table[i] |= DATE_TOKEN_NON_MONTH; - - if (!strchr (TIME_CHARS, i)) - datetok_table[i] |= DATE_TOKEN_NON_TIME; - - if (!strchr (TIMEZONE_ALPHA_CHARS, i)) - datetok_table[i] |= DATE_TOKEN_NON_TIMEZONE_ALPHA; - - if (!strchr (TIMEZONE_NUMERIC_CHARS, i)) - datetok_table[i] |= DATE_TOKEN_NON_TIMEZONE_NUMERIC; - - if (((char) i) == ':') - datetok_table[i] |= DATE_TOKEN_HAS_COLON; - - if (strchr ("+-", i)) - datetok_table[i] |= DATE_TOKEN_HAS_SIGN; - } - - printf ("static unsigned int datetok_table[256] = {"); - for (i = 0; i < 256; i++) { - if (i % 16 == 0) - printf ("\n\t"); - printf ("%3d,", datetok_table[i]); - } - printf ("\n};\n"); -} - - -int main (int argc, char **argv) -{ - time_t date; - int offset; - - /*table_init ();*/ - - date = parse_broken_date (argv[1], &offset); - printf ("%d; %d\n", date, offset); - - return 0; -} - -#endif /* DATETOK_STANDALONE */ |