* Date Format helps you to format and parse dates for any locale. Your code can * be completely independent of the locale conventions for months, days of the * week, or even the calendar format: lunar vs. solar. *
* To format a date for the current Locale with default time and date style, * use one of the static factory methods: *
* \code
* UErrorCode status = U_ZERO_ERROR;
* UChar *myString;
* int32_t myStrlen = 0;
* UDateFormat* dfmt = udat_open(UDAT_DEFAULT, UDAT_DEFAULT, NULL, NULL, -1, NULL, -1, &status);
* myStrlen = udat_format(dfmt, myDate, NULL, myStrlen, NULL, &status);
* if (status==U_BUFFER_OVERFLOW_ERROR){
* status=U_ZERO_ERROR;
* myString=(UChar*)malloc(sizeof(UChar) * (myStrlen+1) );
* udat_format(dfmt, myDate, myString, myStrlen+1, NULL, &status);
* }
* \endcode
*
* If you are formatting multiple numbers, it is more efficient to get the
* format and use it multiple times so that the system doesn't have to fetch the
* information about the local language and country conventions multiple times.
*
* \code
* UErrorCode status = U_ZERO_ERROR;
* int32_t i, myStrlen = 0;
* UChar* myString;
* char buffer[1024];
* UDate myDateArr[] = { 0.0, 100000000.0, 2000000000.0 }; // test values
* UDateFormat* df = udat_open(UDAT_DEFAULT, UDAT_DEFAULT, NULL, NULL, -1, NULL, 0, &status);
* for (i = 0; i < 3; i++) {
* myStrlen = udat_format(df, myDateArr[i], NULL, myStrlen, NULL, &status);
* if(status == U_BUFFER_OVERFLOW_ERROR){
* status = U_ZERO_ERROR;
* myString = (UChar*)malloc(sizeof(UChar) * (myStrlen+1) );
* udat_format(df, myDateArr[i], myString, myStrlen+1, NULL, &status);
* printf("%s\n", u_austrcpy(buffer, myString) );
* free(myString);
* }
* }
* \endcode
*
* To get specific fields of a date, you can use UFieldPosition to
* get specific fields.
*
* \code
* UErrorCode status = U_ZERO_ERROR;
* UFieldPosition pos;
* UChar *myString;
* int32_t myStrlen = 0;
* char buffer[1024];
*
* pos.field = 1; // Same as the DateFormat::EField enum
* UDateFormat* dfmt = udat_open(UDAT_DEFAULT, UDAT_DEFAULT, NULL, -1, NULL, 0, &status);
* myStrlen = udat_format(dfmt, myDate, NULL, myStrlen, &pos, &status);
* if (status==U_BUFFER_OVERFLOW_ERROR){
* status=U_ZERO_ERROR;
* myString=(UChar*)malloc(sizeof(UChar) * (myStrlen+1) );
* udat_format(dfmt, myDate, myString, myStrlen+1, &pos, &status);
* }
* printf("date format: %s\n", u_austrcpy(buffer, myString));
* buffer[pos.endIndex] = 0; // NULL terminate the string.
* printf("UFieldPosition position equals %s\n", &buffer[pos.beginIndex]);
* \endcode
*
* To format a date for a different Locale, s