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Diffstat (limited to 'libical/src/libical/icaltime.c')
-rw-r--r-- | libical/src/libical/icaltime.c | 566 |
1 files changed, 0 insertions, 566 deletions
diff --git a/libical/src/libical/icaltime.c b/libical/src/libical/icaltime.c deleted file mode 100644 index d5b228b089..0000000000 --- a/libical/src/libical/icaltime.c +++ /dev/null @@ -1,566 +0,0 @@ -/* -*- Mode: C -*- - ====================================================================== - FILE: icaltime.c - CREATOR: eric 02 June 2000 - - $Id$ - $Locker$ - - (C) COPYRIGHT 2000, Eric Busboom, http://www.softwarestudio.org - - This program is free software; you can redistribute it and/or modify - it under the terms of either: - - The LGPL as published by the Free Software Foundation, version - 2.1, available at: http://www.fsf.org/copyleft/lesser.html - - Or: - - The Mozilla Public License Version 1.0. You may obtain a copy of - the License at http://www.mozilla.org/MPL/ - - The Original Code is eric. The Initial Developer of the Original - Code is Eric Busboom - - - ======================================================================*/ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "icaltime.h" -#include <assert.h> -#include <string.h> -#include <stdlib.h> -#include <stdio.h> - -#ifdef ICAL_NO_LIBICAL -#define icalerror_set_errno(x) -#define icalerror_check_arg_rv(x,y) -#define icalerror_check_arg_re(x,y,z) -#else -#include "icalerror.h" -#include "icalmemory.h" -#endif - - - - -struct icaltimetype -icaltime_from_timet(time_t tm, int is_date) -{ - struct icaltimetype tt = icaltime_null_time(); - struct tm t; - - t = *(gmtime(&tm)); - - if(is_date == 0){ - tt.second = t.tm_sec; - tt.minute = t.tm_min; - tt.hour = t.tm_hour; - } else { - tt.second = tt.minute =tt.hour = 0 ; - } - - tt.day = t.tm_mday; - tt.month = t.tm_mon + 1; - tt.year = t.tm_year+ 1900; - - tt.is_utc = 1; - tt.is_date = is_date; - - return tt; -} - -/* Structure used by set_tz to hold an old value of TZ, and the new - value, which is in memory we will have to free in unset_tz */ -/* This will hold the last "TZ=XXX" string we used with putenv(). After we - call putenv() again to set a new TZ string, we can free the previous one. - As far as I know, no libc implementations actually free the memory used in - the environment variables (how could they know if it is a static string or - a malloc'ed string?), so we have to free it ourselves. */ -static char* saved_tz = NULL; - - -/* If you use set_tz(), you must call unset_tz() some time later to restore the - original TZ. Pass unset_tz() the string that set_tz() returns. */ -char* set_tz(const char* tzid) -{ - char *old_tz, *old_tz_copy = NULL, *new_tz; - - /* Get the old TZ setting and save a copy of it to return. */ - old_tz = getenv("TZ"); - if(old_tz){ - old_tz_copy = (char*)malloc(strlen (old_tz) + 4); - - if(old_tz_copy == 0){ - icalerror_set_errno(ICAL_NEWFAILED_ERROR); - return 0; - } - - strcpy (old_tz_copy, "TZ="); - strcpy (old_tz_copy + 3, old_tz); - } - - /* Create the new TZ string. */ - new_tz = (char*)malloc(strlen (tzid) + 4); - - if(new_tz == 0){ - icalerror_set_errno(ICAL_NEWFAILED_ERROR); - return 0; - } - - strcpy (new_tz, "TZ="); - strcpy (new_tz + 3, tzid); - - /* Add the new TZ to the environment. */ - putenv(new_tz); - - /* Free any previous TZ environment string we have used. */ - if (saved_tz) - free (saved_tz); - - /* Save a pointer to the TZ string we just set, so we can free it later. */ - saved_tz = new_tz; - - return old_tz_copy; /* This will be zero if the TZ env var was not set */ -} - -void unset_tz(char *tzstr) -{ - /* restore the original environment */ - - if(tzstr!=0){ - putenv(tzstr); - } else { - putenv("TZ"); /* Delete from environment */ - } - - /* Free any previous TZ environment string we have used. */ - if (saved_tz) - free (saved_tz); - - /* Save a pointer to the TZ string we just set, so we can free it later. - (This can possibly be NULL if there was no TZ to restore.) */ - saved_tz = tzstr; -} - -time_t icaltime_as_timet(struct icaltimetype tt) -{ - struct tm stm; - time_t t; - - memset(&stm,0,sizeof( struct tm)); - - if(icaltime_is_null_time(tt)) { - return 0; - } - - stm.tm_sec = tt.second; - stm.tm_min = tt.minute; - stm.tm_hour = tt.hour; - stm.tm_mday = tt.day; - stm.tm_mon = tt.month-1; - stm.tm_year = tt.year-1900; - stm.tm_isdst = -1; - - if(tt.is_utc == 1 || tt.is_date == 1){ - char *old_tz = set_tz("UTC"); - t = mktime(&stm); - unset_tz(old_tz); - } else { - t = mktime(&stm); - } - - return t; - -} - -char* icaltime_as_ical_string(struct icaltimetype tt) -{ - size_t size = 17; - char* buf = icalmemory_new_buffer(size); - - if(tt.is_date){ - snprintf(buf, size,"%04d%02d%02d",tt.year,tt.month,tt.day); - } else { - char* fmt; - if(tt.is_utc){ - fmt = "%04d%02d%02dT%02d%02d%02dZ"; - } else { - fmt = "%04d%02d%02dT%02d%02d%02d"; - } - snprintf(buf, size,fmt,tt.year,tt.month,tt.day, - tt.hour,tt.minute,tt.second); - } - - icalmemory_add_tmp_buffer(buf); - - return buf; - -} - - -/* convert tt, of timezone tzid, into a utc time */ -struct icaltimetype icaltime_as_utc(struct icaltimetype tt,const char* tzid) -{ - int tzid_offset; - - if(tt.is_utc == 1 || tt.is_date == 1){ - return tt; - } - - tzid_offset = icaltime_utc_offset(tt,tzid); - - tt.second -= tzid_offset; - - tt.is_utc = 1; - - return icaltime_normalize(tt); -} - -/* convert tt, a time in UTC, into a time in timezone tzid */ -struct icaltimetype icaltime_as_zone(struct icaltimetype tt,const char* tzid) -{ - int tzid_offset; - - tzid_offset = icaltime_utc_offset(tt,tzid); - - tt.second += tzid_offset; - - tt.is_utc = 0; - - return icaltime_normalize(tt); - -} - - -/* Return the offset of the named zone as seconds. tt is a time - indicating the date for which you want the offset */ -int icaltime_utc_offset(struct icaltimetype ictt, const char* tzid) -{ - - time_t tt = icaltime_as_timet(ictt); - time_t offset_tt; - struct tm gtm; - - char *tz_str = 0; - - if(tzid != 0){ - tz_str = set_tz(tzid); - } - - /* Mis-interpret a UTC broken out time as local time */ - gtm = *(gmtime(&tt)); - gtm.tm_isdst = localtime(&tt)->tm_isdst; - offset_tt = mktime(>m); - - if(tzid != 0){ - unset_tz(tz_str); - } - - return tt-offset_tt; -} - - - -/* Normalize by converting from localtime to utc and back to local - time. This uses localtime because localtime and mktime are inverses - of each other */ - -struct icaltimetype icaltime_normalize(struct icaltimetype tt) -{ - struct tm stm; - time_t tut; - - memset(&stm,0,sizeof( struct tm)); - - stm.tm_sec = tt.second; - stm.tm_min = tt.minute; - stm.tm_hour = tt.hour; - stm.tm_mday = tt.day; - stm.tm_mon = tt.month-1; - stm.tm_year = tt.year-1900; - stm.tm_isdst = -1; /* prevents mktime from changing hour based on - daylight savings */ - - tut = mktime(&stm); - - stm = *(localtime(&tut)); - - tt.second = stm.tm_sec; - tt.minute = stm.tm_min; - tt.hour = stm.tm_hour; - tt.day = stm.tm_mday; - tt.month = stm.tm_mon +1; - tt.year = stm.tm_year+1900; - - return tt; -} - - -#ifndef ICAL_NO_LIBICAL -#include "icalvalue.h" - -struct icaltimetype icaltime_from_string(const char* str) -{ - struct icaltimetype tt = icaltime_null_time(); - int size; - - icalerror_check_arg_re(str!=0,"str",icaltime_null_time()); - - size = strlen(str); - - if(size == 15) { /* floating time */ - tt.is_utc = 0; - tt.is_date = 0; - } else if (size == 16) { /* UTC time, ends in 'Z'*/ - tt.is_utc = 1; - tt.is_date = 0; - - if(str[15] != 'Z'){ - icalerror_set_errno(ICAL_MALFORMEDDATA_ERROR); - return icaltime_null_time(); - } - - } else if (size == 8) { /* A DATE */ - tt.is_utc = 1; - tt.is_date = 1; - } else { /* error */ - icalerror_set_errno(ICAL_MALFORMEDDATA_ERROR); - return icaltime_null_time(); - } - - if(tt.is_date == 1){ - sscanf(str,"%04d%02d%02d",&tt.year,&tt.month,&tt.day); - } else { - char tsep; - sscanf(str,"%04d%02d%02d%c%02d%02d%02d",&tt.year,&tt.month,&tt.day, - &tsep,&tt.hour,&tt.minute,&tt.second); - - if(tsep != 'T'){ - icalerror_set_errno(ICAL_MALFORMEDDATA_ERROR); - return icaltime_null_time(); - } - - } - - return tt; -} -#endif - -char ctime_str[20]; -char* icaltime_as_ctime(struct icaltimetype t) -{ - time_t tt; - - tt = icaltime_as_timet(t); - sprintf(ctime_str,"%s",ctime(&tt)); - - ctime_str[strlen(ctime_str)-1] = 0; - - return ctime_str; -} - - -short days_in_month[] = {0,31,28,31,30,31,30,31,31,30,31,30,31}; - -short icaltime_days_in_month(short month,short year) -{ - - int is_leap =0; - int days = days_in_month[month]; - - assert(month > 0); - assert(month <= 12); - - if( (year % 4 == 0 && year % 100 != 0) || - year % 400 == 0){ - is_leap =1; - } - - if( month == 2){ - days += is_leap; - } - - return days; -} - -/* 1-> Sunday, 7->Saturday */ -short icaltime_day_of_week(struct icaltimetype t){ - - time_t tt = icaltime_as_timet(t); - struct tm *tm; - - if(t.is_utc == 1){ - tm = gmtime(&tt); - } else { - tm = localtime(&tt); - } - - return tm->tm_wday+1; -} - -/* Day of the year that the first day of the week (Sunday) is on */ -short icaltime_start_doy_of_week(struct icaltimetype t){ - time_t tt = icaltime_as_timet(t); - time_t start_tt; - struct tm *stm; - int syear; - - stm = gmtime(&tt); - syear = stm->tm_year; - - start_tt = tt - stm->tm_wday*(60*60*24); - - stm = gmtime(&start_tt); - - if(syear == stm->tm_year){ - return stm->tm_yday+1; - } else { - /* return negative to indicate that start of week is in - previous year. */ - int is_leap = 0; - int year = stm->tm_year; - - if( (year % 4 == 0 && year % 100 != 0) || - year % 400 == 0){ - is_leap =1; - } - - return (stm->tm_yday+1)-(365+is_leap); - } - -} - -short icaltime_week_number(struct icaltimetype ictt) -{ - char str[5]; - time_t t = icaltime_as_timet(ictt); - int week_no; - - strftime(str,5,"%V", gmtime(&t)); - - week_no = atoi(str); - - return week_no; - -} - - -short icaltime_day_of_year(struct icaltimetype t){ - time_t tt = icaltime_as_timet(t); - struct tm *stm; - - if(t.is_utc==1){ - stm = gmtime(&tt); - } else { - stm = localtime(&tt); - } - - return stm->tm_yday+1; - -} - -/* Jan 1 is day #1, not 0 */ -struct icaltimetype icaltime_from_day_of_year(short doy, short year) -{ - struct tm stm; - time_t tt; - char *old_tz = set_tz("UTC"); - - /* Get the time of january 1 of this year*/ - memset(&stm,0,sizeof(struct tm)); - stm.tm_year = year-1900; - stm.tm_mday = 1; - - tt = mktime(&stm); - unset_tz(old_tz); - - - /* Now add in the days */ - - doy--; - tt += doy *60*60*24; - - return icaltime_from_timet(tt, 1); -} - -struct icaltimetype icaltime_null_time() -{ - struct icaltimetype t; - memset(&t,0,sizeof(struct icaltimetype)); - - return t; -} - - -int icaltime_is_valid_time(struct icaltimetype t){ - if(t.is_utc > 1 || t.is_utc < 0 || - t.year < 0 || t.year > 3000 || - t.is_date > 1 || t.is_date < 0){ - return 0; - } else { - return 1; - } - -} - -int icaltime_is_null_time(struct icaltimetype t) -{ - if (t.second +t.minute+t.hour+t.day+t.month+t.year == 0){ - return 1; - } - - return 0; - -} - -int icaltime_compare(struct icaltimetype a,struct icaltimetype b) -{ - time_t t1 = icaltime_as_timet(a); - time_t t2 = icaltime_as_timet(b); - - if (t1 > t2) { - return 1; - } else if (t1 < t2) { - return -1; - } else { - return 0; - } - -} - -int -icaltime_compare_date_only (struct icaltimetype a, struct icaltimetype b) -{ - time_t t1; - time_t t2; - - if (a.year == b.year && a.month == b.month && a.day == b.day) - return 0; - - t1 = icaltime_as_timet (a); - t2 = icaltime_as_timet (b); - - if (t1 > t2) - return 1; - else if (t1 < t2) - return -1; - else { - /* not reached */ - assert (0); - return 0; - } -} - -/* These are defined in icalduration.c: -struct icaltimetype icaltime_add(struct icaltimetype t, - struct icaldurationtype d) -struct icaldurationtype icaltime_subtract(struct icaltimetype t1, - struct icaltimetype t2) -*/ - - - |