90 lines
3.1 KiB
C++
90 lines
3.1 KiB
C++
/**************************************************************************
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*
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* codecvt.cpp - Example program of codecvt facet.
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*
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* $Id: codecvt.cpp 648752 2008-04-16 17:01:56Z faridz $
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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 1998-2006 Rogue Wave Software.
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*
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**************************************************************************/
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#include <iostream>
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#include <codecvte.h>
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#include <examples.h>
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int main ()
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{
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// not used, must be zero-initialized and supplied to facet
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std::mbstate_t state = std::mbstate_t ();
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// three strings to use as buffers
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std::string ins ("\xfc \xcc \xcd \x61 \xe1 \xd9 \xc6 \xe6 \xf5");
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std::string ins2 (ins.size (), '.');
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std::string outs (ins.size () / ex_codecvt ().encoding (), '.');
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// Print initial contents of buffers
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std::cout << "Before:\n"
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<< ins << '\n'
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<< ins2 << '\n'
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<< outs << '\n' << '\n';
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// Create a user defined codecvt fact
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// This facet converts from ISO Latin Alphabet No. 1 (ISO 8859-1)
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// to U.S. ASCII code page 437.
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// Replace the default codecvt<char, char, mbstate_t>.
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std::locale loc (std::cout.getloc (), new ex_codecvt);
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// Retrieve the facet from the locale.
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typedef std::codecvt<char, char, std::mbstate_t> CodeCvt;
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const CodeCvt& cdcvt = std::use_facet<CodeCvt>(loc);
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// unused, must be provided to codecvt<>::in/out
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const char *const_out_next = 0;
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const char *const_in_next = 0;
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char *in_next = 0;
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char *out_next = 0;
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// convert the buffer
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cdcvt.in (state, ins.c_str (), ins.c_str () + ins.length (), const_in_next,
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&outs [0], &outs [0] + outs.length (), out_next);
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std::cout << "After in:\n"
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<< ins << '\n'
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<< ins2 << '\n'
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<< outs << "\n\n";
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// zero-initialize (unused) state object
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state = std::mbstate_t ();
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// Finally, convert back to the original codeset
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cdcvt.out (state, outs.c_str (), outs.c_str () + outs.length (),
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const_out_next, &ins [0], &ins [0] + ins.length (), in_next);
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std::cout << "After out:\n"
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<< ins << '\n'
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<< ins2 << '\n'
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<< outs << '\n';
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return 0;
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}
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