hyung-hwan
7053747ab2
- fixed a bug in qse_sed_exec() to return success on flush() error - added Sed::setError() - completed a sample program sed03.cpp
126 lines
2.7 KiB
C++
126 lines
2.7 KiB
C++
/**
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* $Id$
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*
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Copyright 2006-2009 Chung, Hyung-Hwan.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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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 implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include <qse/sed/StdSed.hpp>
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#include <qse/utl/main.h>
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#include <string>
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#include <iostream>
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typedef std::basic_string<QSE::StdSed::char_t> xstring;
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typedef QSE::StdSed StdSed; // added for doxygen cross-reference
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//
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// The MySed class provides a handier interface to QSE::StdSed by
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// reimplementing console I/O functions, combining compile() and execute(),
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// and utilizing exception handling.
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//
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class MySed: protected QSE::StdSed
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{
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public:
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class Error
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{
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public:
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Error (const char_t* msg) throw (): msg (msg) { }
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const char_t* getMessage() const throw() { return msg; }
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protected:
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const char_t* msg;
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};
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MySed ()
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{
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if (QSE::StdSed::open() == -1)
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throw Error (QSE_T("cannot open"));
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}
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~MySed ()
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{
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QSE::StdSed::close ();
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}
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void run (const char_t* cmds, const char_t* in, xstring& out)
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{
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// remember an input string and an output string
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this->in = in; this->out = &out;
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// compile source commands and execute compiled commands.
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if (QSE::StdSed::compile (cmds) <= -1 ||
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QSE::StdSed::execute () <= -1)
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{
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throw Error (QSE::StdSed::getErrorMessage());
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}
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}
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protected:
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// override console I/O functions to perform I/O over strings.
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int openConsole (Console& io)
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{
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if (io.getMode() == Console::WRITE) out->clear();
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return 1;
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}
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int closeConsole (Console& io)
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{
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return 0;
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}
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ssize_t readConsole (Console& io, char_t* buf, size_t len)
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{
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ssize_t n = qse_strxcpy (buf, len, in);
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in += n; return n;
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}
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ssize_t writeConsole (Console& io, const char_t* buf, size_t len)
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{
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try { out->append (buf, len); return len; }
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catch (...) { QSE::Sed::setError (QSE_SED_ENOMEM); throw; }
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}
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protected:
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const char_t* in;
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xstring* out;
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};
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int sed_main (int argc, qse_char_t* argv[])
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{
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try
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{
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MySed sed;
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xstring out;
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sed.run (
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QSE_T("y/ABC/abc/;s/abc/def/g"),
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QSE_T("ABCDEFabcdef"), out);
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std::cout << QSE_T("OUTPUT: ") << out << std::endl;
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}
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catch (MySed::Error& err)
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{
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std::cout << QSE_T("ERROR: ") << err.getMessage() << std::endl;
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return -1;
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}
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return 0;
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}
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int qse_main (int argc, char* argv[])
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{
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return qse_runmain (argc, argv, sed_main);
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}
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