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60 lines
2.1 KiB
C++
60 lines
2.1 KiB
C++
//===- llvm/Support/FileUtilities.h - File System Utilities -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines a family of utility functions which are useful for doing
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// various things with files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_FILEUTILITIES_H
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#define LLVM_SUPPORT_FILEUTILITIES_H
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#include "llvm/System/Path.h"
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namespace llvm {
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/// DiffFiles - Compare the two files specified, returning true if they are
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/// different or if there is a file error. If you specify a string to fill in
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/// for the error option, it will set the string to an error message if an error
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/// occurs, allowing the caller to distinguish between a failed diff and a file
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/// system error.
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///
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bool DiffFiles(const std::string &FileA, const std::string &FileB,
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std::string *Error = 0);
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/// MoveFileOverIfUpdated - If the file specified by New is different than Old,
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/// or if Old does not exist, move the New file over the Old file. Otherwise,
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/// remove the New file.
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///
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void MoveFileOverIfUpdated(const std::string &New, const std::string &Old);
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/// FileRemover - This class is a simple object meant to be stack allocated.
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/// If an exception is thrown from a region, the object removes the filename
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/// specified (if deleteIt is true).
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///
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class FileRemover {
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sys::Path Filename;
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bool DeleteIt;
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public:
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FileRemover(const sys::Path &filename, bool deleteIt = true)
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: Filename(filename), DeleteIt(deleteIt) {}
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~FileRemover() {
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if (DeleteIt)
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Filename.destroyFile();
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}
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/// releaseFile - Take ownership of the file away from the FileRemover so it
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/// will not be removed when the object is destroyed.
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void releaseFile() { DeleteIt = false; }
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};
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} // End llvm namespace
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#endif
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