Check in the pristine copy of ICU 4.6...

icu46/source/test/compat/tzdate.c

+/*
+**********************************************************************
+*   Copyright (C) 2007-2007, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+**********************************************************************
+*
+* File tzdate.c
+*
+* Author:  Michael Ow
+*
+**********************************************************************
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+#include <string.h>
+
+#include "unicode/utypes.h"
+#include "unicode/ustring.h"
+#include "unicode/uclean.h"
+
+#include "unicode/ucnv.h"
+#include "unicode/udat.h"
+#include "unicode/ucal.h"
+
+#include "putilimp.h"
+
+#define SIZE 80
+#define OFFSET_MONTH 1
+
+int64_t getSystemCurrentTime(char* systime, int year, int month, int day, int hour, int minute, int useCurrentTime);
+void getICUCurrentTime(char* icutime, double timeToCheck);
+void printTime(char* systime, char* icutime);
+
+int main(int argc, char** argv) {
+    char systime[SIZE];
+    char icutime[SIZE];
+    int year, month, day, hour, minute;
+    int sysyear;
+    int useCurrentTime;
+    int64_t systemtime;
+    
+    sysyear = year = month = day = 0;
+    
+    if (argc <= 6) {
+        fprintf(stderr, "Not enough arguments\n");
+        return -1;
+    }
+
+    year = atoi(argv[1]);
+    month = atoi(argv[2]);
+    day = atoi(argv[3]);
+    hour = atoi(argv[4]);
+    minute = atoi(argv[5]);
+    useCurrentTime = atoi(argv[6]);
+    
+    /* format year for system time */
+    sysyear = year - 1900;
+    
+    systemtime = getSystemCurrentTime(systime, sysyear, month, day, hour, minute, useCurrentTime);
+    getICUCurrentTime(icutime, systemtime * U_MILLIS_PER_SECOND);
+
+    /* print out the times if failed */
+    if (strcmp(systime, icutime) != 0) {
+        printf("Failed\n");
+        printTime(systime, icutime);
+    }
+
+    return 0;
+}
+
+void getICUCurrentTime(char* icutime, double timeToCheck) {
+    UDateFormat *fmt;
+    const UChar *tz = 0;
+    UChar *s = 0;
+    UDateFormatStyle style = UDAT_RELATIVE;
+    UErrorCode status = U_ZERO_ERROR;
+    int32_t len = 0;
+    int i;
+
+    fmt = udat_open(style, style, 0, tz, -1,NULL,0, &status);
+
+    len = udat_format(fmt, timeToCheck, 0, len, 0, &status);
+
+    if (status == U_BUFFER_OVERFLOW_ERROR)
+        status = U_ZERO_ERROR;
+
+    s = (UChar*) malloc(sizeof(UChar) * (len+1));
+
+    if(s == 0) 
+        goto finish;
+
+    udat_format(fmt, timeToCheck, s, len + 1, 0, &status);
+    
+    if (U_FAILURE(status)) 
+        goto finish;
+
+    /* +1 to NULL terminate */
+    for(i = 0; i < len+1; i++) {
+        icutime[i] = (char)s[i];
+    }
+
+finish:
+    udat_close(fmt);
+    free(s);
+}
+
+int64_t getSystemCurrentTime(char* systime, int year, int month, int day, int hour, int minute, int useCurrentTime) {
+    time_t now;
+    struct tm ts;
+
+    if (useCurrentTime){
+        time(&now);
+        ts = *localtime(&now);
+    }
+    else {
+        memset(&ts, 0, sizeof(ts));
+        ts.tm_year = year;
+        ts.tm_mon = month - OFFSET_MONTH;
+        ts.tm_mday = day;
+        ts.tm_hour = hour;
+        ts.tm_min = minute;
+
+        now = mktime(&ts);
+        ts = *localtime(&now);
+    }
+
+    /* Format the string */
+    strftime(systime, sizeof(char) * 80, "%Y%m%d %I:%M %p", &ts);
+
+    return (double)now;
+}
+
+void printTime(char* systime, char* icutime) {
+    printf("System Time:  %s\n", systime);
+    printf("ICU Time:     %s\n", icutime);
+    printf("STD=%s DST=%s OFFSET=%d\n", uprv_tzname(0), uprv_tzname(1), uprv_timezone());
+}
+