41 lines
1.0 KiB
C++
41 lines
1.0 KiB
C++
#ifndef _RAR_SAVEPOS_
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#define _RAR_SAVEPOS_
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class SaveFilePos
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{
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private:
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File *SaveFile;
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int64 SavePos;
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public:
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SaveFilePos(File &Src)
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{
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SaveFile=&Src;
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SavePos=Src.Tell();
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}
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~SaveFilePos()
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{
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// Unless the file is already closed either by current exception
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// processing or intentionally by external code.
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if (SaveFile->IsOpened())
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{
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try
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{
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SaveFile->Seek(SavePos,SEEK_SET);
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}
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catch(RAR_EXIT)
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{
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// Seek() can throw an exception and it terminates process
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// if we are already processing another exception. Also in C++ 11
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// an exception in destructor always terminates process unless
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// we mark destructor with noexcept(false). So we do not want to
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// throw here. To prevent data loss we do not want to continue
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// execution after seek error, so we close the file.
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// Any next access to this file will return an error.
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SaveFile->Close();
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}
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}
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}
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};
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#endif
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