diff options
Diffstat (limited to 'src/test/timezones.c')
| -rw-r--r-- | src/test/timezones.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/src/test/timezones.c b/src/test/timezones.c new file mode 100644 index 0000000..ac8598f --- /dev/null +++ b/src/test/timezones.c @@ -0,0 +1,134 @@ +/* -*- Mode: C -*- + ====================================================================== + + The contents of this file are subject to the Mozilla Public License + Version 1.0 (the "License"); you may not use this file except in + compliance with the License. You may obtain a copy of the License at + http://www.mozilla.org/MPL/ + + Software distributed under the License is distributed on an "AS IS" + basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + the License for the specific language governing rights and + limitations under the License. + + ======================================================================*/ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <libical/ical.h> +#include <time.h> +#include <stdio.h> +#include <stdlib.h> + +int main(int argc, char **argv) +{ + icalarray *timezones = icaltimezone_get_builtin_timezones(); + int i; + int ret = 0; + unsigned int total_failed = 0; + unsigned int total_okay = 0; + int verbose = 0; + icaltimezone *utc_zone = icaltimezone_get_utc_timezone(); + + /* for all known time zones... */ + for (i = 0; i < timezones->num_elements; i++) { + icaltimezone *zone = icalarray_element_at(timezones, i); + const char *zone_location = icaltimezone_get_location(zone); + int day; + time_t start_time; + struct tm start_tm; + time_t curr_time; + struct tm curr_tm; + struct icaltimetype curr_tt; + int failed = 0; + int curr_failed; + + /* + * select this location for glibc: needs support for TZ=<location> + * which is not POSIX + */ + setenv("TZ", zone_location, 1); + tzset(); + + /* + * determine current local time and date: always use midday in + * the current zone + */ + start_time = time(NULL); + localtime_r(&start_time, &start_tm); + start_tm.tm_hour = 12; + start_tm.tm_min = 0; + start_tm.tm_sec = 0; + start_time = mktime(&start_tm); + + /* check time conversion for the next 365 days */ + for (day = 0, curr_time = start_time; + day < 365; + day++, curr_time += 24 * 60 * 60) { + /* determine date/time with glibc */ + localtime_r(&curr_time, &curr_tm); + /* determine date/time with libical */ + curr_tt = icaltime_from_timet_with_zone(curr_time, 0, utc_zone); + curr_tt.zone = utc_zone; /* workaround: icaltime_from_timet_with_zone() should do this, but doesn't! */ + curr_tt = icaltime_convert_to_zone(curr_tt, zone); + + /* compare... */ + curr_failed = + curr_tm.tm_year + 1900 != curr_tt.year || + curr_tm.tm_mon + 1 != curr_tt.month || + curr_tm.tm_mday != curr_tt.day || + curr_tm.tm_hour != curr_tt.hour || + curr_tm.tm_min != curr_tt.minute || + curr_tm.tm_sec != curr_tt.second; + + /* only print first failed day and first day which is okay again */ + if (verbose || curr_failed != failed) { + printf("%s: day %03d: %s: libc %04d-%02d-%02d %02d:%02d:%02d dst %d", + zone_location, + day, + verbose ? + (curr_failed ? "failed" : "okay") : + (curr_failed ? "first failed" : "okay again"), + + curr_tm.tm_year + 1900, + curr_tm.tm_mon + 1, + curr_tm.tm_mday, + curr_tm.tm_hour, + curr_tm.tm_min, + curr_tm.tm_sec, + curr_tm.tm_isdst); + if (curr_failed) { + printf(" != libical %04d-%02d-%02d %02d:%02d:%02d dst %d", + curr_tt.year, + curr_tt.month, + curr_tt.day, + curr_tt.hour, + curr_tt.minute, + curr_tt.second, + curr_tt.is_daylight); + ret = 1; + } + printf("\n"); + failed = curr_failed; + } + + if (curr_failed) { + total_failed++; + } else { + total_okay++; + } + } + } + + if (total_failed || total_okay) { + printf(" *** Summary: %d zones tested, %u days failed, %u okay => %u%% failed ***\n", + timezones->num_elements, + total_failed, + total_okay, + total_failed * 100 / (total_failed + total_okay)); + } + + return ret; +} |