TestTimeZoneIanaAlias.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
 
#include <winpr/wtypes.h>
#include <winpr/string.h>
#include <winpr/timezone.h>
 
#if !defined(_WIN32)
static BOOL test_tz(const char* iana, const char* expected)
{
  char key[128] = WINPR_C_ARRAY_INIT;
  DYNAMIC_TIME_ZONE_INFORMATION tzif = WINPR_C_ARRAY_INIT;
 
  // NOLINTNEXTLINE(concurrency-mt-unsafe)
  if (setenv("TZ", iana, 1) != 0)
    return FALSE;
  tzset();
 
  (void)GetDynamicTimeZoneInformation(&tzif);
  if (ConvertWCharNToUtf8(tzif.TimeZoneKeyName, ARRAYSIZE(tzif.TimeZoneKeyName), key,
                          sizeof(key)) < 0)
    return FALSE;
 
  if (strcmp(key, expected) != 0)
  {
    (void)fprintf(stderr, "%s: expected time zone key '%s', got '%s'\n", iana, expected, key);
    return FALSE;
  }
  return TRUE;
}
#endif
 
int TestTimeZoneIanaAlias(int argc, char* argv[])
{
  WINPR_UNUSED(argc);
  WINPR_UNUSED(argv);
 
#if !defined(_WIN32)
  /* current IANA names that CLDR's windowsZones.xml still spells the old way */
  if (!test_tz("Asia/Kolkata", "India Standard Time"))
    return -1;
  if (!test_tz("Europe/Kyiv", "FLE Standard Time"))
    return -1;
  if (!test_tz("Asia/Kathmandu", "Nepal Standard Time"))
    return -1;
  if (!test_tz("Asia/Yangon", "Myanmar Standard Time"))
    return -1;
  /* in a multi zone entry of the fallback table (where the system does not resolve it to its
   * tzdata link target Pacific/Guadalcanal, which maps to the same key) */
  if (!test_tz("Pacific/Pohnpei", "Central Pacific Standard Time"))
    return -1;
  /* the old spelling keeps working */
  if (!test_tz("Asia/Calcutta", "India Standard Time"))
    return -1;
  if (!test_tz("Europe/Kiev", "FLE Standard Time"))
    return -1;
  if (!test_tz("Asia/Katmandu", "Nepal Standard Time"))
    return -1;
  if (!test_tz("Asia/Rangoon", "Myanmar Standard Time"))
    return -1;
#endif
 
  return 0;
}