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extern/stdcxx/4.2.1/examples/manual/time_get.cpp

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+/**************************************************************************
+ *
+ * timeget.cpp - Example program for the time_get facet. 
+ *
+ * $Id: time_get.cpp 550991 2007-06-26 23:58:07Z sebor $
+ *
+ ***************************************************************************
+ *
+ * Licensed to the Apache Software  Foundation (ASF) under one or more
+ * contributor  license agreements.  See  the NOTICE  file distributed
+ * with  this  work  for  additional information  regarding  copyright
+ * ownership.   The ASF  licenses this  file to  you under  the Apache
+ * License, Version  2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the  License is distributed on an  "AS IS" BASIS,
+ * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
+ * implied.   See  the License  for  the  specific language  governing
+ * permissions and limitations under the License.
+ *
+ * Copyright 1994-2006 Rogue Wave Software.
+ * 
+ **************************************************************************/
+
+// NOTE: A SunPro bug requires time.h preceed locale. PR #26255
+#include <ctime>      // for struct tm
+#include <locale>     // for locale, time_get
+#include <sstream>    // for stringstream
+#include <iostream>   // for cout, endl
+
+
+// Print out a tm struct value in one atomic operation
+std::ostream& operator<< (std::ostream &os, const std::tm &t)
+{
+    std::stringstream strm;
+
+    strm << "Daylight Savings = "   << t.tm_isdst
+         << "\nDay of year      = " << t.tm_yday
+         << "\nDay of week      = " << t.tm_wday
+         << "\nYear             = " << t.tm_year
+         << "\nMonth            = " << t.tm_mon
+         << "\nDay of month     = " << t.tm_mday
+         << "\nHour             = " << t.tm_hour
+         << "\nMinute           = " << t.tm_min
+         << "\nSecond           = " << t.tm_sec
+         << '\n';
+
+    // guard for thread safety and output synchronization
+    const std::ostream::sentry guard (os);
+
+    if (guard)
+        os.rdbuf ()->sputn (strm.str ().c_str (), strm.str ().size ());
+    else
+        os.setstate (os.failbit);
+
+    return os;
+}
+
+
+int main ()
+{
+    typedef std::istreambuf_iterator<char, std::char_traits<char> > Iter;
+
+    // time struct to parse date into
+    static std::tm timeb;  // zero initialized
+
+    // Unused, required by time_get
+    std::ios_base::iostate state;
+
+    // Stream object to read from
+    std::istringstream ins ("");
+
+    // Iterators into the stream object
+    Iter begin (ins);
+    Iter end;
+
+    const std::locale loc ("C");
+
+    // Get a reference to the time_get facet in locale loc.
+    const std::time_get<char, Iter> &tg =
+        std::use_facet<std::time_get<char, Iter> >(loc);
+
+    // Display time_base::dateorder value.
+    std::cout << "time_base::dateorder == " << tg.date_order () << ".\n";
+  
+    // Insert date string into stream.
+    ins.str ("04/07/69");
+
+    // get_date from the stream and output tm contents.
+    tg.get_date (begin, end, ins, state, &timeb);
+    std::cout << "Date: Apr 7 1969\n" << timeb << std::endl;
+
+    // Insert weekday string into stream.
+    ins.str ("Monday");
+
+    // get_weekday from the stream and output tm contents.
+    tg.get_weekday (begin, end, ins, state, &timeb);
+    std::cout << "Weekday: Monday\n" << timeb << std::endl;
+  
+    // Insert time string into stream.
+    ins.str ("06:47:32");
+
+    // get_time from the stream and output tm contents.
+    tg.get_time (begin, end, ins, state, &timeb);
+    std::cout << "Time: 06:47:32\n" << timeb << std::endl;
+
+    return 0;
+}