X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FSupport%2FPath.cpp;h=2dd6741c73508b93c22029b03fd4f9930c580bbb;hb=82acfbfe86e798e260738f0b25e6b61117f35541;hp=dabf763c8dbf637a9053614e1354330e9befc1eb;hpb=81f207bf78fd79a5059e34b523ec881378227989;p=oota-llvm.git diff --git a/lib/Support/Path.cpp b/lib/Support/Path.cpp index dabf763c8db..2dd6741c735 100644 --- a/lib/Support/Path.cpp +++ b/lib/Support/Path.cpp @@ -11,6 +11,7 @@ // //===----------------------------------------------------------------------===// +#include "llvm/Support/Errc.h" #include "llvm/Support/Path.h" #include "llvm/Support/Endian.h" #include "llvm/Support/ErrorHandling.h" @@ -164,12 +165,12 @@ enum FSEntity { }; // Implemented in Unix/Path.inc and Windows/Path.inc. -static error_code TempDir(SmallVectorImpl &result); +static std::error_code TempDir(SmallVectorImpl &result); -static error_code createUniqueEntity(const Twine &Model, int &ResultFD, - SmallVectorImpl &ResultPath, - bool MakeAbsolute, unsigned Mode, - FSEntity Type) { +static std::error_code createUniqueEntity(const Twine &Model, int &ResultFD, + SmallVectorImpl &ResultPath, + bool MakeAbsolute, unsigned Mode, + FSEntity Type) { SmallString<128> ModelStorage; Model.toVector(ModelStorage); @@ -177,7 +178,7 @@ static error_code createUniqueEntity(const Twine &Model, int &ResultFD, // Make model absolute by prepending a temp directory if it's not already. if (!sys::path::is_absolute(Twine(ModelStorage))) { SmallString<128> TDir; - if (error_code EC = TempDir(TDir)) + if (std::error_code EC = TempDir(TDir)) return EC; sys::path::append(TDir, Twine(ModelStorage)); ModelStorage.swap(TDir); @@ -201,34 +202,35 @@ retry_random_path: // Try to open + create the file. switch (Type) { case FS_File: { - if (error_code EC = + if (std::error_code EC = sys::fs::openFileForWrite(Twine(ResultPath.begin()), ResultFD, sys::fs::F_RW | sys::fs::F_Excl, Mode)) { - if (EC == std::errc::file_exists) + if (EC == errc::file_exists) goto retry_random_path; return EC; } - return error_code(); + return std::error_code(); } case FS_Name: { bool Exists; - error_code EC = sys::fs::exists(ResultPath.begin(), Exists); + std::error_code EC = sys::fs::exists(ResultPath.begin(), Exists); if (EC) return EC; if (Exists) goto retry_random_path; - return error_code(); + return std::error_code(); } case FS_Dir: { - if (error_code EC = sys::fs::create_directory(ResultPath.begin(), false)) { - if (EC == std::errc::file_exists) + if (std::error_code EC = + sys::fs::create_directory(ResultPath.begin(), false)) { + if (EC == errc::file_exists) goto retry_random_path; return EC; } - return error_code(); + return std::error_code(); } } llvm_unreachable("Invalid Type"); @@ -306,7 +308,30 @@ const_iterator &const_iterator::operator++() { return *this; } -const_iterator &const_iterator::operator--() { +bool const_iterator::operator==(const const_iterator &RHS) const { + return Path.begin() == RHS.Path.begin() && Position == RHS.Position; +} + +ptrdiff_t const_iterator::operator-(const const_iterator &RHS) const { + return Position - RHS.Position; +} + +reverse_iterator rbegin(StringRef Path) { + reverse_iterator I; + I.Path = Path; + I.Position = Path.size(); + return ++I; +} + +reverse_iterator rend(StringRef Path) { + reverse_iterator I; + I.Path = Path; + I.Component = Path.substr(0, 0); + I.Position = 0; + return I; +} + +reverse_iterator &reverse_iterator::operator++() { // If we're at the end and the previous char was a '/', return '.' unless // we are the root path. size_t root_dir_pos = root_dir_start(Path); @@ -333,19 +358,11 @@ const_iterator &const_iterator::operator--() { return *this; } -bool const_iterator::operator==(const const_iterator &RHS) const { - return Path.begin() == RHS.Path.begin() && +bool reverse_iterator::operator==(const reverse_iterator &RHS) const { + return Path.begin() == RHS.Path.begin() && Component == RHS.Component && Position == RHS.Position; } -bool const_iterator::operator!=(const const_iterator &RHS) const { - return !(*this == RHS); -} - -ptrdiff_t const_iterator::operator-(const const_iterator &RHS) const { - return Position - RHS.Position; -} - const StringRef root_path(StringRef path) { const_iterator b = begin(path), pos = b, @@ -530,7 +547,7 @@ void native(SmallVectorImpl &path) { } const StringRef filename(StringRef path) { - return *(--end(path)); + return *rbegin(path); } const StringRef stem(StringRef path) { @@ -705,29 +722,30 @@ bool is_relative(const Twine &path) { namespace fs { -error_code getUniqueID(const Twine Path, UniqueID &Result) { +std::error_code getUniqueID(const Twine Path, UniqueID &Result) { file_status Status; - error_code EC = status(Path, Status); + std::error_code EC = status(Path, Status); if (EC) return EC; Result = Status.getUniqueID(); - return error_code(); + return std::error_code(); } -error_code createUniqueFile(const Twine &Model, int &ResultFd, - SmallVectorImpl &ResultPath, unsigned Mode) { +std::error_code createUniqueFile(const Twine &Model, int &ResultFd, + SmallVectorImpl &ResultPath, + unsigned Mode) { return createUniqueEntity(Model, ResultFd, ResultPath, false, Mode, FS_File); } -error_code createUniqueFile(const Twine &Model, - SmallVectorImpl &ResultPath) { +std::error_code createUniqueFile(const Twine &Model, + SmallVectorImpl &ResultPath) { int Dummy; return createUniqueEntity(Model, Dummy, ResultPath, false, 0, FS_Name); } -static error_code createTemporaryFile(const Twine &Model, int &ResultFD, - llvm::SmallVectorImpl &ResultPath, - FSEntity Type) { +static std::error_code +createTemporaryFile(const Twine &Model, int &ResultFD, + llvm::SmallVectorImpl &ResultPath, FSEntity Type) { SmallString<128> Storage; StringRef P = Model.toNullTerminatedStringRef(Storage); assert(P.find_first_of(separators) == StringRef::npos && @@ -737,24 +755,22 @@ static error_code createTemporaryFile(const Twine &Model, int &ResultFD, true, owner_read | owner_write, Type); } -static error_code +static std::error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix, int &ResultFD, - llvm::SmallVectorImpl &ResultPath, - FSEntity Type) { + llvm::SmallVectorImpl &ResultPath, FSEntity Type) { const char *Middle = Suffix.empty() ? "-%%%%%%" : "-%%%%%%."; return createTemporaryFile(Prefix + Middle + Suffix, ResultFD, ResultPath, Type); } - -error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix, - int &ResultFD, - SmallVectorImpl &ResultPath) { +std::error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix, + int &ResultFD, + SmallVectorImpl &ResultPath) { return createTemporaryFile(Prefix, Suffix, ResultFD, ResultPath, FS_File); } -error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix, - SmallVectorImpl &ResultPath) { +std::error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix, + SmallVectorImpl &ResultPath) { int Dummy; return createTemporaryFile(Prefix, Suffix, Dummy, ResultPath, FS_Name); } @@ -762,14 +778,14 @@ error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix, // This is a mkdtemp with a different pattern. We use createUniqueEntity mostly // for consistency. We should try using mkdtemp. -error_code createUniqueDirectory(const Twine &Prefix, - SmallVectorImpl &ResultPath) { +std::error_code createUniqueDirectory(const Twine &Prefix, + SmallVectorImpl &ResultPath) { int Dummy; return createUniqueEntity(Prefix + "-%%%%%%", Dummy, ResultPath, true, 0, FS_Dir); } -error_code make_absolute(SmallVectorImpl &path) { +std::error_code make_absolute(SmallVectorImpl &path) { StringRef p(path.data(), path.size()); bool rootDirectory = path::has_root_directory(p), @@ -781,11 +797,12 @@ error_code make_absolute(SmallVectorImpl &path) { // Already absolute. if (rootName && rootDirectory) - return error_code(); + return std::error_code(); // All of the following conditions will need the current directory. SmallString<128> current_dir; - if (error_code ec = current_path(current_dir)) return ec; + if (std::error_code ec = current_path(current_dir)) + return ec; // Relative path. Prepend the current directory. if (!rootName && !rootDirectory) { @@ -793,7 +810,7 @@ error_code make_absolute(SmallVectorImpl &path) { path::append(current_dir, p); // Set path to the result. path.swap(current_dir); - return error_code(); + return std::error_code(); } if (!rootName && rootDirectory) { @@ -802,7 +819,7 @@ error_code make_absolute(SmallVectorImpl &path) { path::append(curDirRootName, p); // Set path to the result. path.swap(curDirRootName); - return error_code(); + return std::error_code(); } if (rootName && !rootDirectory) { @@ -814,22 +831,22 @@ error_code make_absolute(SmallVectorImpl &path) { SmallString<128> res; path::append(res, pRootName, bRootDirectory, bRelativePath, pRelativePath); path.swap(res); - return error_code(); + return std::error_code(); } llvm_unreachable("All rootName and rootDirectory combinations should have " "occurred above!"); } -error_code create_directories(const Twine &Path, bool IgnoreExisting) { +std::error_code create_directories(const Twine &Path, bool IgnoreExisting) { SmallString<128> PathStorage; StringRef P = Path.toStringRef(PathStorage); // Be optimistic and try to create the directory - error_code EC = create_directory(P, IgnoreExisting); + std::error_code EC = create_directory(P, IgnoreExisting); // If we succeeded, or had any error other than the parent not existing, just // return it. - if (EC != std::errc::no_such_file_or_directory) + if (EC != errc::no_such_file_or_directory) return EC; // We failed because of a no_such_file_or_directory, try to create the @@ -844,6 +861,40 @@ error_code create_directories(const Twine &Path, bool IgnoreExisting) { return create_directory(P, IgnoreExisting); } +std::error_code copy_file(const Twine &From, const Twine &To) { + int ReadFD, WriteFD; + if (std::error_code EC = openFileForRead(From, ReadFD)) + return EC; + if (std::error_code EC = openFileForWrite(To, WriteFD, F_None)) { + close(ReadFD); + return EC; + } + + const size_t BufSize = 4096; + char *Buf = new char[BufSize]; + int BytesRead = 0, BytesWritten = 0; + for (;;) { + BytesRead = read(ReadFD, Buf, BufSize); + if (BytesRead <= 0) + break; + while (BytesRead) { + BytesWritten = write(WriteFD, Buf, BytesRead); + if (BytesWritten < 0) + break; + BytesRead -= BytesWritten; + } + if (BytesWritten < 0) + break; + } + close(ReadFD); + close(WriteFD); + delete[] Buf; + + if (BytesRead < 0 || BytesWritten < 0) + return std::error_code(errno, std::generic_category()); + return std::error_code(); +} + bool exists(file_status status) { return status_known(status) && status.type() != file_type::file_not_found; } @@ -856,24 +907,24 @@ bool is_directory(file_status status) { return status.type() == file_type::directory_file; } -error_code is_directory(const Twine &path, bool &result) { +std::error_code is_directory(const Twine &path, bool &result) { file_status st; - if (error_code ec = status(path, st)) + if (std::error_code ec = status(path, st)) return ec; result = is_directory(st); - return error_code(); + return std::error_code(); } bool is_regular_file(file_status status) { return status.type() == file_type::regular_file; } -error_code is_regular_file(const Twine &path, bool &result) { +std::error_code is_regular_file(const Twine &path, bool &result) { file_status st; - if (error_code ec = status(path, st)) + if (std::error_code ec = status(path, st)) return ec; result = is_regular_file(st); - return error_code(); + return std::error_code(); } bool is_other(file_status status) { @@ -891,7 +942,7 @@ void directory_entry::replace_filename(const Twine &filename, file_status st) { } /// @brief Identify the magic in magic. - file_magic identify_magic(StringRef Magic) { +file_magic identify_magic(StringRef Magic) { if (Magic.size() < 4) return file_magic::unknown; switch ((unsigned char)Magic[0]) { @@ -1022,21 +1073,21 @@ void directory_entry::replace_filename(const Twine &filename, file_status st) { return file_magic::unknown; } -error_code identify_magic(const Twine &Path, file_magic &Result) { +std::error_code identify_magic(const Twine &Path, file_magic &Result) { int FD; - if (error_code EC = openFileForRead(Path, FD)) + if (std::error_code EC = openFileForRead(Path, FD)) return EC; char Buffer[32]; int Length = read(FD, Buffer, sizeof(Buffer)); - if (Length < 0) - return error_code(errno, std::generic_category()); + if (close(FD) != 0 || Length < 0) + return std::error_code(errno, std::generic_category()); Result = identify_magic(StringRef(Buffer, Length)); - return error_code(); + return std::error_code(); } -error_code directory_entry::status(file_status &result) const { +std::error_code directory_entry::status(file_status &result) const { return fs::status(Path, result); }