forked from OSchip/llvm-project
137 lines
4.9 KiB
C++
137 lines
4.9 KiB
C++
//===-- Core/IncludeExcludeInfo.cpp - IncludeExclude class impl -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief This file provides the implementation of the IncludeExcludeInfo class
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/// to handle the include and exclude command line options.
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///
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//===----------------------------------------------------------------------===//
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#include "IncludeExcludeInfo.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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namespace {
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/// \brief Helper function to determine whether a file has the same path
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/// prefix as \a Path.
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///
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/// \a Path must be an absolute path.
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bool fileHasPathPrefix(StringRef File, StringRef Path) {
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// Converts File to its absolute path.
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SmallString<64> AbsoluteFile = File;
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sys::fs::make_absolute(AbsoluteFile);
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// Convert path strings to sys::path to iterate over each of its directories.
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sys::path::const_iterator FileI = sys::path::begin(AbsoluteFile),
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FileE = sys::path::end(AbsoluteFile),
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PathI = sys::path::begin(Path),
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PathE = sys::path::end(Path);
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while (FileI != FileE && PathI != PathE) {
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// If the strings aren't equal then the two paths aren't contained within
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// each other.
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if (!FileI->equals(*PathI))
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return false;
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++FileI;
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++PathI;
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}
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return true;
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}
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/// \brief Helper function to tokenize a string of paths and populate
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/// the vector.
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error_code parseCLInput(StringRef Line, std::vector<std::string> &List,
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StringRef Separator) {
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SmallVector<StringRef, 32> Tokens;
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Line.split(Tokens, Separator, /*MaxSplit=*/ -1, /*KeepEmpty=*/ false);
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for (SmallVectorImpl<StringRef>::iterator I = Tokens.begin(),
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E = Tokens.end();
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I != E; ++I) {
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// Convert each path to its absolute path.
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SmallString<64> Path = I->rtrim();
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if (error_code Err = sys::fs::make_absolute(Path))
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return Err;
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// sys::fs::make_absolute will turn "." into "<pwd>/.". Need to strip "/."
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// off or it interferes with prefix checking.
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if (Path.endswith("/."))
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List.push_back(Path.slice(0, Path.size() - 2).str());
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else
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List.push_back(Path.str());
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llvm::errs() << "Parse: " <<List.back() << "\n";
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}
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return error_code::success();
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}
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} // end anonymous namespace
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error_code IncludeExcludeInfo::readListFromString(StringRef IncludeString,
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StringRef ExcludeString) {
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if (error_code Err = parseCLInput(IncludeString, IncludeList,
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/*Separator=*/ ","))
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return Err;
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if (error_code Err = parseCLInput(ExcludeString, ExcludeList,
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/*Separator=*/ ","))
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return Err;
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return error_code::success();
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}
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error_code IncludeExcludeInfo::readListFromFile(StringRef IncludeListFile,
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StringRef ExcludeListFile) {
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if (!IncludeListFile.empty()) {
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OwningPtr<MemoryBuffer> FileBuf;
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if (error_code Err = MemoryBuffer::getFile(IncludeListFile, FileBuf)) {
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errs() << "Unable to read from include file.\n";
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return Err;
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}
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if (error_code Err = parseCLInput(FileBuf->getBuffer(), IncludeList,
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/*Separator=*/ "\n"))
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return Err;
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}
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if (!ExcludeListFile.empty()) {
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OwningPtr<MemoryBuffer> FileBuf;
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if (error_code Err = MemoryBuffer::getFile(ExcludeListFile, FileBuf)) {
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errs() << "Unable to read from exclude file.\n";
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return Err;
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}
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if (error_code Err = parseCLInput(FileBuf->getBuffer(), ExcludeList,
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/*Separator=*/ "\n"))
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return Err;
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}
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return error_code::success();
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}
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bool IncludeExcludeInfo::isFileIncluded(StringRef FilePath) const {
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bool InIncludeList = false;
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for (std::vector<std::string>::const_iterator I = IncludeList.begin(),
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E = IncludeList.end();
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I != E; ++I)
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if ((InIncludeList = fileHasPathPrefix(FilePath, *I)))
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break;
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// If file is not in the list of included paths then it is not necessary
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// to check the excluded path list.
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if (!InIncludeList)
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return false;
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for (std::vector<std::string>::const_iterator I = ExcludeList.begin(),
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E = ExcludeList.end();
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I != E; ++I)
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if (fileHasPathPrefix(FilePath, *I))
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return false;
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// If the file is in the included list but not in the excluded list, then
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// it is safe to transform.
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return true;
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}
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