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* Bug #673013 - Doesn't expose webkit Cflags/LibsDan Vrátil2012-03-291-1/+1
* Adapt to camel-provider-1.2.pc going away.Matthew Barnes2011-09-281-1/+1
* Do not require unique-3.0 in .pc filesMilan Crha2011-04-221-1/+1
* Drop support for gtk+-2.0.Matthew Barnes2011-01-251-1/+1
* add gtkhtml-editorChenthill Palanisamy2010-06-291-1/+1
* remove the duplicate stringChenthill Palanisamy2010-06-291-1/+1
* Use version 3.0 for evolution-<module>.pc files while compiling with gtk3. Se...Chenthill Palanisamy2010-06-291-1/+1
* Remove libgnomecanvas-2.0 from pkg-config files.Matthew Barnes2010-06-161-1/+1
* Bug #456240 - Move exchange plugin to exchange packageMilan Crha2009-10-021-1/+1
* Goodbye libgnome and libgnomeui!!Matthew Barnes2009-09-191-1/+1
* Bug #587011 - Add more requirements to evolution-plugin.pc.inMilan Crha2009-09-181-1/+1
* Drop libbonoboui from configure.ac and pkg-config files.Matthew Barnes2009-08-301-1/+1
* Require libxml-2.0.Matthew Barnes2007-04-041-1/+1
* Include rpath in libs specified. Fixes #350385. (Patch submitted byHarish Krishnaswamy2006-08-191-1/+1
* defined @datarootdir@. Patch submitted by Frederic Peters.Harish Krishnaswamy2006-07-101-0/+1
* evolution-plugin.pc.in Use @privsolibdir@ to set privlibdir.Tor Lillqvist2005-12-171-1/+1
* Retired GAL from Head. The relevant files have moved inside evolution.Kaushal Kumar2005-06-171-1/+1
* use @GAL_PACKAGE@ instead of hardcoding the version. FixesAmish2005-05-041-1/+1
* added evolution-plugin.pc, pkg-config file required for pluginNot Zed2004-12-161-0/+19
generated by cgit (git 2.34.1) at 2025-03-11 02:19:16 +0800
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Jeffrey Stedfast <fejj@helixcode.com>
 *
 *  Copyright 2000 Helix Code, Inc. (www.helixcode.com)
 *
 *  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 2 of the License, 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., 59 Temple Street #330, Boston, MA 02111-1307, USA.
 *
 */

#include "broken-date-parser.h"

/* prototypes for functions dealing with broken date formats */
static GList *datetok (const gchar *date);
static gint get_days_in_month (gint mon, gint year);
static gint get_weekday (gchar *str);
static gint get_month (gchar *str);

static char *tz_months [] = {
    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};

/*****************************************************************************
 * The following functions are here in the case of badly broken date formats *
 *                                                                           *
 * -- fejj@helixcode.com                                                     *
 *****************************************************************************/

typedef struct {
    gchar dow[6];   /* day of week (should only need 4 chars) */
    gint day;
    gint mon;       /* 1->12 or 0 if invalid */
    gint year;
    gint hour;
    gint min;
    gint sec;
    gchar zone[6];  /* time zone */
} date_t;

static
GList *datetok (const gchar *date)
{
    GList *tokens = NULL;
    gchar *token, *start, *end;
    
    start = (gchar *) date;
    while (*start) {
        /* find the end of this token */
        for (end = start; *end && *end != ' '; end++);
        
        token = g_strndup (start, (end - start));
        
        if (token && *token)
            tokens = g_list_append (tokens, token);
        else
            g_free (token);

        if (*end)
            start = end + 1;
        else
            break;
    }

    return tokens;
}

static gint
get_days_in_month (gint mon, gint year)
{
    switch (mon) {
    case 1: case 3: case 5: case 7: case 8: case 10: case 12:
        return 31;
    case 4: case 6: case 9: case 11:
        return 30;
    case 2:
        if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)
            return 29;
        return 28;
    default:
        return 30;
    }
}

static gint
get_weekday (gchar *str)
{
    g_return_val_if_fail ((str != NULL), 0);

    if (strncmp (str, "Mon", 3) == 0) {
        return 1;
    } else if (strncmp (str, "Tue", 3) == 0) {
        return 2;
    } else if (strncmp (str, "Wed", 3) == 0) {
        return 3;
    } else if (strncmp (str, "Thu", 3) == 0) {
        return 4;
    } else if (strncmp (str, "Fri", 3) == 0) {
        return 5;
    } else if (strncmp (str, "Sat", 3) == 0) {
        return 6;
    } else if (strncmp (str, "Sun", 3) == 0) {
        return 7;
    }

    return 0;  /* unknown week day */
}

static gint
get_month (gchar *str)
{
    g_return_val_if_fail (str != NULL, 0);
    
    if (strncmp (str, "Jan", 3) == 0) {
        return 1;
    } else if (strncmp (str, "Feb", 3) == 0) {
        return 2;
    } else if (strncmp (str, "Mar", 3) == 0) {
        return 3;
    } else if (strncmp (str, "Apr", 3) == 0) {
        return 4;
    } else if (strncmp (str, "May", 3) == 0) {
        return 5;
    } else if (strncmp (str, "Jun", 3) == 0) {
        return 6;
    } else if (strncmp (str, "Jul", 3) == 0) {
        return 7;
    } else if (strncmp (str, "Aug", 3) == 0) {
        return 8;
    } else if (strncmp (str, "Sep", 3) == 0) {
        return 9;
    } else if (strncmp (str, "Oct", 3) == 0) {
        return 10;
    } else if (strncmp (str, "Nov", 3) == 0) {
        return 11;
    } else if (strncmp (str, "Dec", 3) == 0) {
        return 12;
    }
    
    return 0;  /* unknown month */
}

gchar *
parse_broken_date (const gchar *datestr)
{
    GList *tokens;
    date_t date;
    gchar *token, *ptr, *newdatestr;
    guint len, i, retval;
    gdouble tz = 0.0;

    memset ((void*)&date, 0, sizeof (date_t));
    g_return_val_if_fail (datestr != NULL, NULL);
    
    tokens = datetok (datestr);
    len = g_list_length (tokens);
    for (i = 0; i < len; i++) {
        token = g_list_nth_data (tokens, i);
        
        if ((retval = get_weekday (token))) {
            strncpy (date.dow, datestr, 4);
        } else if ((retval = get_month (token))) {
            date.mon = retval;
        } else if (strlen (token) <= 2) {
            /* this could be a 1 or 2 digit day of the month */
            for (retval = 1, ptr = token; *ptr; ptr++)
                if (*ptr < '0' || *ptr > '9')
                    retval = 0;
            
            if (retval && atoi (token) <= 31 && !date.day)  /* probably should find a better way */
                date.day = atoi (token);
            else                                            /* fubar'd client using a 2-digit year */
                date.year = atoi (token) < 69 ? 2000 + atoi (token) : 1900 + atoi (token);
        } else if (strlen (token) == 4) {
            /* this could be the year... */
            for (retval = 1, ptr = token; *ptr; ptr++)
                if (*ptr < '0' || *ptr > '9')
                    retval = 0;
            
            if (retval)
                date.year = atoi (token);
        } else if (strchr (token, ':')) {
            /* this must be the time: hh:mm:ss */
            sscanf (token, "%d:%d:%d", &date.hour, &date.min, &date.sec);
        } else if (*token == '-' || *token == '+') {
            tz = atoi (token) / 100.0;
        }
    }
    
    g_list_free (tokens);
    
    /* adjust times based on time zones */
    
    if (tz != 0) {
        /* check for time-zone shift */
        if (tz > 0) {
            /* correct for positive hours off of UCT */
            date.hour -= (tz / 100);
            tz = (gint)tz % 100;
            
            if (tz > 0) /* correct for positive minutes off of UCT */
                date.min -= (gint)(((gdouble) tz / 100.0) * 60.0);
        } else {
            if (tz < 0) {
                /* correct for negative hours off of UCT */
                tz = -tz;
                date.hour += (tz / 100);
                tz = -((gint)tz % 100);
                
                if (tz < 0)
                    date.min -= (gint)(((gdouble) tz / 100.0) * 60.0);
            }
        }
        
        /* adjust seconds to proper range */
        if (date.sec > 59) {
            date.min += (date.sec / 60);
            date.sec = (date.sec % 60);
        }
        
        /* adjust minutes to proper range */
        if (date.min > 59) {
            date.hour += (date.min / 60);
            date.min = (date.min % 60);
        } else {
            if (date.min < 0) {
                date.min = -date.min;
                date.hour -= (date.min / 60) - 1;
                date.min = 60 - (date.min % 60);
            }
        }
        
        /* adjust hours to the proper randge */
        if (date.hour > 23) {
            date.day += (date.hour / 24);
            date.hour -= (date.hour % 24);
        } else {
            if (date.hour < 0) {
                date.hour = -date.hour;
                date.day -= (date.hour / 24) - 1;
                date.hour = 24 - (date.hour % 60);
            }
        }
        
        /* adjust days to the proper range */
        while (date.day > get_days_in_month (date.mon, date.year)) {
            date.day -= get_days_in_month (date.mon, date.year);
            date.mon++;
            if (date.mon > 12) {
                date.year += (date.mon / 12);
                date.mon = (date.mon % 12);
                if (date.mon == 0) {
                    /* month sanity check */
                    date.mon = 12;
                    date.year -= 1;
                }
            }
        }
        
        while (date.day < 1) {
            date.day += get_days_in_month (date.mon, date.year);
            date.mon--;
            if (date.mon < 1) {
                date.mon = -date.mon;
                date.year -= (date.mon / 12) - 1;
                date.mon = 12 - (date.mon % 12);
            }
        }
        
        /* adjust months to the proper range */
        if (date.mon > 12) {
            date.year += (date.mon / 12);
            date.mon = (date.mon % 12);
            if (date.mon == 0) {
                /* month sanity check */
                date.mon = 12;
                date.year -= 1;
            }
        } else {
            if (date.mon < 1) {
                date.mon = -date.mon;
                date.year -= (date.mon / 12) - 1;
                date.mon = 12 - (date.mon % 12);
            }
        }
    }

    /* now lets print this date into a string with the correct format */
    newdatestr = g_strdup_printf ("%s, %d %s %d %s%d:%s%d:%s%d -0000",
                      date.dow, date.day, tz_months[date.mon-1],
                      date.year,
                      date.hour > 10 ? "" : "0", date.hour,
                      date.min > 10 ? "" : "0", date.min,
                      date.sec > 10 ? "" : "0", date.sec);
    
    return newdatestr;
}

/*****************************************************************************
 * This ends the code for the broken date parser...                          *
 *                                                                           *
 * -- fejj@helixcode.com                                                     *
 *****************************************************************************/
generated by cgit (git 2.34.1) at 2025-03-11 02:19:15 +0800