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61 lines
1.7 KiB
61 lines
1.7 KiB
// David Eberly, Geometric Tools, Redmond WA 98052
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// Copyright (c) 1998-2021
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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// https://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
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// Version: 4.0.2019.08.13
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#pragma once
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#include <Mathematics/Logger.h>
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#include <fstream>
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namespace gte
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{
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class LogToFile : public Logger::Listener
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{
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public:
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LogToFile(std::string const& filename, int flags)
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:
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Logger::Listener(flags),
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mFilename(filename)
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{
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std::ofstream logFile(filename);
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if (logFile)
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{
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// This clears the file contents from any previous runs.
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logFile.close();
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}
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else
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{
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// The file cannot be opened. Use a null string for Report to
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// know not to attempt opening the file for append.
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mFilename = "";
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}
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}
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private:
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virtual void Report(std::string const& message)
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{
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if (mFilename != "")
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{
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// Open for append.
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std::ofstream logFile(mFilename, std::ios_base::out | std::ios_base::app);
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if (logFile)
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{
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logFile << message.c_str();
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logFile.close();
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}
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else
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{
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// The file cannot be opened. Use a null string for
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// Report not to attempt opening the file for append on
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// the next call.
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mFilename = "";
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}
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}
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}
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std::string mFilename;
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};
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}
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