118 lines
3.5 KiB
C++
118 lines
3.5 KiB
C++
// Cppcheck - A tool for static C/C++ code analysis
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// Copyright (C) 2007-2023 Cppcheck team.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef REDIRECT_H
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#define REDIRECT_H
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#include <iostream>
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#include <sstream>
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#include <stdexcept>
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#include <string>
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/**
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* @brief Utility class for capturing cout and cerr to ostringstream buffers
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* for later use. Uses RAII to stop redirection when the object goes out of
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* scope.
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* NOTE: This is *not* thread-safe.
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*/
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class RedirectOutputError {
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public:
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/** Set up redirection, flushing anything in the pipes. */
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RedirectOutputError() {
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// flush all old output
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std::cout.flush();
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std::cerr.flush();
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_oldCout = std::cout.rdbuf(); // back up cout's streambuf
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_oldCerr = std::cerr.rdbuf(); // back up cerr's streambuf
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std::cout.rdbuf(_out.rdbuf()); // assign streambuf to cout
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std::cerr.rdbuf(_err.rdbuf()); // assign streambuf to cerr
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}
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/** Revert cout and cerr behaviour */
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~RedirectOutputError() noexcept(false) {
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std::cout.rdbuf(_oldCout); // restore cout's original streambuf
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std::cerr.rdbuf(_oldCerr); // restore cerrs's original streambuf
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{
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const std::string s = _out.str();
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if (!s.empty())
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throw std::runtime_error("unconsumed stdout: " + s); // cppcheck-suppress exceptThrowInDestructor - FP #11031
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}
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{
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const std::string s = _err.str();
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if (!s.empty())
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throw std::runtime_error("consumed stderr: " + s);
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}
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}
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/** Return what would be printed to cout. */
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std::string getOutput() {
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std::string s = _out.str();
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_out.str("");
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return s;
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}
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/** Return what would be printed to cerr. */
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std::string getErrout() {
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std::string s = _err.str();
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_err.str("");
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return s;
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}
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private:
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std::ostringstream _out;
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std::ostringstream _err;
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std::streambuf *_oldCout;
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std::streambuf *_oldCerr;
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};
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class SuppressOutput {
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public:
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/** Set up suppression, flushing anything in the pipes. */
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SuppressOutput() {
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// flush all old output
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std::cout.flush();
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std::cerr.flush();
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_oldCout = std::cout.rdbuf(); // back up cout's streambuf
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_oldCerr = std::cerr.rdbuf(); // back up cerr's streambuf
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std::cout.rdbuf(nullptr); // disable cout
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std::cerr.rdbuf(nullptr); // disable cerr
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}
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/** Revert cout and cerr behaviour */
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~SuppressOutput() {
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std::cout.rdbuf(_oldCout); // restore cout's original streambuf
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std::cerr.rdbuf(_oldCerr); // restore cerrs's original streambuf
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}
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private:
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std::streambuf *_oldCout;
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std::streambuf *_oldCerr;
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};
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#define REDIRECT RedirectOutputError redir
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#define GET_REDIRECT_OUTPUT redir.getOutput()
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#define GET_REDIRECT_ERROUT redir.getErrout()
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#define SUPPRESS SuppressOutput supprout
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#endif
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