88 lines
3.2 KiB
C++
88 lines
3.2 KiB
C++
/**************************************************************************
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*
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* collate.cpp - Example program of collate facet.
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*
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* $Id: collate.cpp 550991 2007-06-26 23:58:07Z sebor $
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*
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***************************************************************************
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*
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* Copyright 1994-2006 Rogue Wave Software.
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*
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**************************************************************************/
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#include <iostream> // for cout
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#include <locale> // for collate
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#include <examples.h>
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int main ()
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{
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const std::string s1 ("blue");
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const std::string s2 ("blues");
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std::cout << "String 1 : " << s1
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<< "\nString 2 : " << s2 << '\n';
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// obtain a reference to the collate facet
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// installed in the locale imbued in cout
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const std::collate<char>& co =
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std::use_facet<std::collate<char> >(std::cout.getloc ());
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// use the facet to compare the two strings
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int res = co.compare (s1.c_str (), s1.c_str () + s1.length (),
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s2.c_str (), s2.c_str () + s2.length () - 1);
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// strings should collate equal
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std::cout << "Strings \""
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<< s1.substr(0, s1.length ()) << "\" and \""
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<< s2.substr(0, s2.length () - 1)
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<< "\" should compare equal : "
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<< (res ? "not " : "") << "equal\n";
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res = co.compare (s1.c_str (), s1.c_str () + s1.length (),
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s2.c_str (), s2.c_str () + s2.length ());
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// strings should collate unequal
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std::cout << "Strings \""
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<< s1.c_str () << "\" and \"" << s2.c_str ()
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<< "\" should compare NOT equal : "
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<< (res ? "not " : "") << "equal\n";
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// compute hash values for the two strings
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// expected values:
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// ILP32: 431029 and 6896579
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// LP64: 1651275109 and 422726428019
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const long hash1 = co.hash (s1.c_str (), s1.c_str () + s1.length ());
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const long hash2 = co.hash (s2.c_str (), s2.c_str () + s2.length ());
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// normalize the two hash values for portability
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// between 32-bit and 64-bit longs
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const long norm1 = 440460L;
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const long norm2 = 7898347L;
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// expect 431029 on output
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std::cout << "Normalized hash value for \"" << s1.c_str () << "\" : "
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<< hash1 % norm1
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<< "\nNormalized hash value for \"" << s2.c_str () << "\" : "
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<< hash2 % norm2
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<< '\n';
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return 0;
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}
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