forked from OSchip/llvm-project
1189 lines
33 KiB
C++
1189 lines
33 KiB
C++
//===-- Path.cpp - Implement OS Path Concept ------------------------------===//
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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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// This file implements the operating system Path API.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/COFF.h"
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#include "llvm/Support/MachO.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/Errc.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/Process.h"
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#include <cctype>
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#include <cstring>
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#if !defined(_MSC_VER) && !defined(__MINGW32__)
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#include <unistd.h>
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#else
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#include <io.h>
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#endif
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using namespace llvm;
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using namespace llvm::support::endian;
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namespace {
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using llvm::StringRef;
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using llvm::sys::path::is_separator;
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#ifdef LLVM_ON_WIN32
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const char *separators = "\\/";
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const char preferred_separator = '\\';
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#else
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const char separators = '/';
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const char preferred_separator = '/';
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#endif
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StringRef find_first_component(StringRef path) {
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// Look for this first component in the following order.
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// * empty (in this case we return an empty string)
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// * either C: or {//,\\}net.
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// * {/,\}
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// * {file,directory}name
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if (path.empty())
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return path;
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#ifdef LLVM_ON_WIN32
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// C:
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if (path.size() >= 2 && std::isalpha(static_cast<unsigned char>(path[0])) &&
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path[1] == ':')
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return path.substr(0, 2);
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#endif
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// //net
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if ((path.size() > 2) &&
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is_separator(path[0]) &&
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path[0] == path[1] &&
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!is_separator(path[2])) {
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// Find the next directory separator.
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size_t end = path.find_first_of(separators, 2);
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return path.substr(0, end);
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}
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// {/,\}
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if (is_separator(path[0]))
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return path.substr(0, 1);
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// * {file,directory}name
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size_t end = path.find_first_of(separators);
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return path.substr(0, end);
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}
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size_t filename_pos(StringRef str) {
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if (str.size() == 2 &&
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is_separator(str[0]) &&
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str[0] == str[1])
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return 0;
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if (str.size() > 0 && is_separator(str[str.size() - 1]))
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return str.size() - 1;
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size_t pos = str.find_last_of(separators, str.size() - 1);
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#ifdef LLVM_ON_WIN32
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if (pos == StringRef::npos)
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pos = str.find_last_of(':', str.size() - 2);
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#endif
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if (pos == StringRef::npos ||
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(pos == 1 && is_separator(str[0])))
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return 0;
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return pos + 1;
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}
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size_t root_dir_start(StringRef str) {
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// case "c:/"
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#ifdef LLVM_ON_WIN32
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if (str.size() > 2 &&
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str[1] == ':' &&
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is_separator(str[2]))
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return 2;
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#endif
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// case "//"
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if (str.size() == 2 &&
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is_separator(str[0]) &&
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str[0] == str[1])
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return StringRef::npos;
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// case "//net"
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if (str.size() > 3 &&
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is_separator(str[0]) &&
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str[0] == str[1] &&
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!is_separator(str[2])) {
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return str.find_first_of(separators, 2);
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}
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// case "/"
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if (str.size() > 0 && is_separator(str[0]))
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return 0;
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return StringRef::npos;
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}
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size_t parent_path_end(StringRef path) {
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size_t end_pos = filename_pos(path);
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bool filename_was_sep = path.size() > 0 && is_separator(path[end_pos]);
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// Skip separators except for root dir.
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size_t root_dir_pos = root_dir_start(path.substr(0, end_pos));
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while(end_pos > 0 &&
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(end_pos - 1) != root_dir_pos &&
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is_separator(path[end_pos - 1]))
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--end_pos;
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if (end_pos == 1 && root_dir_pos == 0 && filename_was_sep)
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return StringRef::npos;
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return end_pos;
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}
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} // end unnamed namespace
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enum FSEntity {
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FS_Dir,
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FS_File,
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FS_Name
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};
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static std::error_code createUniqueEntity(const Twine &Model, int &ResultFD,
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SmallVectorImpl<char> &ResultPath,
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bool MakeAbsolute, unsigned Mode,
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FSEntity Type) {
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SmallString<128> ModelStorage;
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Model.toVector(ModelStorage);
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if (MakeAbsolute) {
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// Make model absolute by prepending a temp directory if it's not already.
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if (!sys::path::is_absolute(Twine(ModelStorage))) {
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SmallString<128> TDir;
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sys::path::system_temp_directory(true, TDir);
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sys::path::append(TDir, Twine(ModelStorage));
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ModelStorage.swap(TDir);
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}
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}
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// From here on, DO NOT modify model. It may be needed if the randomly chosen
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// path already exists.
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ResultPath = ModelStorage;
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// Null terminate.
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ResultPath.push_back(0);
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ResultPath.pop_back();
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retry_random_path:
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// Replace '%' with random chars.
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for (unsigned i = 0, e = ModelStorage.size(); i != e; ++i) {
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if (ModelStorage[i] == '%')
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ResultPath[i] = "0123456789abcdef"[sys::Process::GetRandomNumber() & 15];
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}
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// Try to open + create the file.
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switch (Type) {
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case FS_File: {
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if (std::error_code EC =
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sys::fs::openFileForWrite(Twine(ResultPath.begin()), ResultFD,
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sys::fs::F_RW | sys::fs::F_Excl, Mode)) {
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if (EC == errc::file_exists)
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goto retry_random_path;
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return EC;
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}
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return std::error_code();
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}
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case FS_Name: {
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std::error_code EC =
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sys::fs::access(ResultPath.begin(), sys::fs::AccessMode::Exist);
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if (EC == errc::no_such_file_or_directory)
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return std::error_code();
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if (EC)
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return EC;
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goto retry_random_path;
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}
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case FS_Dir: {
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if (std::error_code EC =
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sys::fs::create_directory(ResultPath.begin(), false)) {
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if (EC == errc::file_exists)
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goto retry_random_path;
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return EC;
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}
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return std::error_code();
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}
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}
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llvm_unreachable("Invalid Type");
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}
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namespace llvm {
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namespace sys {
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namespace path {
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const_iterator begin(StringRef path) {
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const_iterator i;
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i.Path = path;
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i.Component = find_first_component(path);
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i.Position = 0;
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return i;
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}
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const_iterator end(StringRef path) {
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const_iterator i;
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i.Path = path;
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i.Position = path.size();
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return i;
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}
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const_iterator &const_iterator::operator++() {
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assert(Position < Path.size() && "Tried to increment past end!");
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// Increment Position to past the current component
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Position += Component.size();
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// Check for end.
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if (Position == Path.size()) {
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Component = StringRef();
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return *this;
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}
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// Both POSIX and Windows treat paths that begin with exactly two separators
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// specially.
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bool was_net = Component.size() > 2 &&
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is_separator(Component[0]) &&
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Component[1] == Component[0] &&
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!is_separator(Component[2]);
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// Handle separators.
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if (is_separator(Path[Position])) {
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// Root dir.
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if (was_net
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#ifdef LLVM_ON_WIN32
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// c:/
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|| Component.endswith(":")
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#endif
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) {
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Component = Path.substr(Position, 1);
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return *this;
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}
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// Skip extra separators.
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while (Position != Path.size() &&
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is_separator(Path[Position])) {
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++Position;
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}
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// Treat trailing '/' as a '.'.
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if (Position == Path.size()) {
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--Position;
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Component = ".";
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return *this;
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}
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}
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// Find next component.
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size_t end_pos = Path.find_first_of(separators, Position);
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Component = Path.slice(Position, end_pos);
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return *this;
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}
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bool const_iterator::operator==(const const_iterator &RHS) const {
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return Path.begin() == RHS.Path.begin() && Position == RHS.Position;
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}
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ptrdiff_t const_iterator::operator-(const const_iterator &RHS) const {
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return Position - RHS.Position;
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}
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reverse_iterator rbegin(StringRef Path) {
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reverse_iterator I;
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I.Path = Path;
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I.Position = Path.size();
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return ++I;
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}
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reverse_iterator rend(StringRef Path) {
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reverse_iterator I;
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I.Path = Path;
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I.Component = Path.substr(0, 0);
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I.Position = 0;
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return I;
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}
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reverse_iterator &reverse_iterator::operator++() {
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// If we're at the end and the previous char was a '/', return '.' unless
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// we are the root path.
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size_t root_dir_pos = root_dir_start(Path);
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if (Position == Path.size() &&
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Path.size() > root_dir_pos + 1 &&
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is_separator(Path[Position - 1])) {
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--Position;
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Component = ".";
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return *this;
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}
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// Skip separators unless it's the root directory.
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size_t end_pos = Position;
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while(end_pos > 0 &&
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(end_pos - 1) != root_dir_pos &&
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is_separator(Path[end_pos - 1]))
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--end_pos;
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// Find next separator.
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size_t start_pos = filename_pos(Path.substr(0, end_pos));
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Component = Path.slice(start_pos, end_pos);
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Position = start_pos;
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return *this;
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}
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bool reverse_iterator::operator==(const reverse_iterator &RHS) const {
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return Path.begin() == RHS.Path.begin() && Component == RHS.Component &&
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Position == RHS.Position;
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}
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ptrdiff_t reverse_iterator::operator-(const reverse_iterator &RHS) const {
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return Position - RHS.Position;
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}
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StringRef root_path(StringRef path) {
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const_iterator b = begin(path),
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pos = b,
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e = end(path);
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if (b != e) {
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bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
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bool has_drive =
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#ifdef LLVM_ON_WIN32
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b->endswith(":");
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#else
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false;
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#endif
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if (has_net || has_drive) {
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if ((++pos != e) && is_separator((*pos)[0])) {
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// {C:/,//net/}, so get the first two components.
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return path.substr(0, b->size() + pos->size());
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} else {
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// just {C:,//net}, return the first component.
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return *b;
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}
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}
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// POSIX style root directory.
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if (is_separator((*b)[0])) {
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return *b;
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}
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}
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return StringRef();
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}
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StringRef root_name(StringRef path) {
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const_iterator b = begin(path),
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e = end(path);
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if (b != e) {
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bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
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bool has_drive =
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#ifdef LLVM_ON_WIN32
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b->endswith(":");
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#else
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false;
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#endif
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if (has_net || has_drive) {
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// just {C:,//net}, return the first component.
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return *b;
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}
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}
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// No path or no name.
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return StringRef();
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}
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StringRef root_directory(StringRef path) {
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const_iterator b = begin(path),
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pos = b,
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e = end(path);
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if (b != e) {
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bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
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bool has_drive =
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#ifdef LLVM_ON_WIN32
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b->endswith(":");
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#else
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false;
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#endif
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if ((has_net || has_drive) &&
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// {C:,//net}, skip to the next component.
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(++pos != e) && is_separator((*pos)[0])) {
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return *pos;
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}
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// POSIX style root directory.
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if (!has_net && is_separator((*b)[0])) {
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return *b;
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}
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}
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// No path or no root.
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return StringRef();
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}
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StringRef relative_path(StringRef path) {
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StringRef root = root_path(path);
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return path.substr(root.size());
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}
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void append(SmallVectorImpl<char> &path, const Twine &a,
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const Twine &b,
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const Twine &c,
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const Twine &d) {
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SmallString<32> a_storage;
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SmallString<32> b_storage;
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SmallString<32> c_storage;
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SmallString<32> d_storage;
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SmallVector<StringRef, 4> components;
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if (!a.isTriviallyEmpty()) components.push_back(a.toStringRef(a_storage));
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if (!b.isTriviallyEmpty()) components.push_back(b.toStringRef(b_storage));
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if (!c.isTriviallyEmpty()) components.push_back(c.toStringRef(c_storage));
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if (!d.isTriviallyEmpty()) components.push_back(d.toStringRef(d_storage));
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for (auto &component : components) {
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bool path_has_sep = !path.empty() && is_separator(path[path.size() - 1]);
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bool component_has_sep = !component.empty() && is_separator(component[0]);
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bool is_root_name = has_root_name(component);
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if (path_has_sep) {
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// Strip separators from beginning of component.
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size_t loc = component.find_first_not_of(separators);
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StringRef c = component.substr(loc);
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// Append it.
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path.append(c.begin(), c.end());
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continue;
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}
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if (!component_has_sep && !(path.empty() || is_root_name)) {
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// Add a separator.
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path.push_back(preferred_separator);
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}
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path.append(component.begin(), component.end());
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}
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}
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void append(SmallVectorImpl<char> &path,
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const_iterator begin, const_iterator end) {
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for (; begin != end; ++begin)
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path::append(path, *begin);
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}
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StringRef parent_path(StringRef path) {
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size_t end_pos = parent_path_end(path);
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if (end_pos == StringRef::npos)
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return StringRef();
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else
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return path.substr(0, end_pos);
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}
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void remove_filename(SmallVectorImpl<char> &path) {
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size_t end_pos = parent_path_end(StringRef(path.begin(), path.size()));
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if (end_pos != StringRef::npos)
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path.set_size(end_pos);
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}
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void replace_extension(SmallVectorImpl<char> &path, const Twine &extension) {
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StringRef p(path.begin(), path.size());
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SmallString<32> ext_storage;
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StringRef ext = extension.toStringRef(ext_storage);
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// Erase existing extension.
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size_t pos = p.find_last_of('.');
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if (pos != StringRef::npos && pos >= filename_pos(p))
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path.set_size(pos);
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// Append '.' if needed.
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if (ext.size() > 0 && ext[0] != '.')
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path.push_back('.');
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// Append extension.
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path.append(ext.begin(), ext.end());
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}
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void replace_path_prefix(SmallVectorImpl<char> &Path,
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const StringRef &OldPrefix,
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const StringRef &NewPrefix) {
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if (OldPrefix.empty() && NewPrefix.empty())
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return;
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StringRef OrigPath(Path.begin(), Path.size());
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if (!OrigPath.startswith(OldPrefix))
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return;
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// If prefixes have the same size we can simply copy the new one over.
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if (OldPrefix.size() == NewPrefix.size()) {
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std::copy(NewPrefix.begin(), NewPrefix.end(), Path.begin());
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return;
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}
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|
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StringRef RelPath = OrigPath.substr(OldPrefix.size());
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SmallString<256> NewPath;
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path::append(NewPath, NewPrefix);
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path::append(NewPath, RelPath);
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Path.swap(NewPath);
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}
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|
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void native(const Twine &path, SmallVectorImpl<char> &result) {
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assert((!path.isSingleStringRef() ||
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path.getSingleStringRef().data() != result.data()) &&
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"path and result are not allowed to overlap!");
|
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// Clear result.
|
|
result.clear();
|
|
path.toVector(result);
|
|
native(result);
|
|
}
|
|
|
|
void native(SmallVectorImpl<char> &Path) {
|
|
#ifdef LLVM_ON_WIN32
|
|
std::replace(Path.begin(), Path.end(), '/', '\\');
|
|
#else
|
|
for (auto PI = Path.begin(), PE = Path.end(); PI < PE; ++PI) {
|
|
if (*PI == '\\') {
|
|
auto PN = PI + 1;
|
|
if (PN < PE && *PN == '\\')
|
|
++PI; // increment once, the for loop will move over the escaped slash
|
|
else
|
|
*PI = '/';
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
StringRef filename(StringRef path) {
|
|
return *rbegin(path);
|
|
}
|
|
|
|
StringRef stem(StringRef path) {
|
|
StringRef fname = filename(path);
|
|
size_t pos = fname.find_last_of('.');
|
|
if (pos == StringRef::npos)
|
|
return fname;
|
|
else
|
|
if ((fname.size() == 1 && fname == ".") ||
|
|
(fname.size() == 2 && fname == ".."))
|
|
return fname;
|
|
else
|
|
return fname.substr(0, pos);
|
|
}
|
|
|
|
StringRef extension(StringRef path) {
|
|
StringRef fname = filename(path);
|
|
size_t pos = fname.find_last_of('.');
|
|
if (pos == StringRef::npos)
|
|
return StringRef();
|
|
else
|
|
if ((fname.size() == 1 && fname == ".") ||
|
|
(fname.size() == 2 && fname == ".."))
|
|
return StringRef();
|
|
else
|
|
return fname.substr(pos);
|
|
}
|
|
|
|
bool is_separator(char value) {
|
|
switch(value) {
|
|
#ifdef LLVM_ON_WIN32
|
|
case '\\': // fall through
|
|
#endif
|
|
case '/': return true;
|
|
default: return false;
|
|
}
|
|
}
|
|
|
|
static const char preferred_separator_string[] = { preferred_separator, '\0' };
|
|
|
|
StringRef get_separator() {
|
|
return preferred_separator_string;
|
|
}
|
|
|
|
bool has_root_name(const Twine &path) {
|
|
SmallString<128> path_storage;
|
|
StringRef p = path.toStringRef(path_storage);
|
|
|
|
return !root_name(p).empty();
|
|
}
|
|
|
|
bool has_root_directory(const Twine &path) {
|
|
SmallString<128> path_storage;
|
|
StringRef p = path.toStringRef(path_storage);
|
|
|
|
return !root_directory(p).empty();
|
|
}
|
|
|
|
bool has_root_path(const Twine &path) {
|
|
SmallString<128> path_storage;
|
|
StringRef p = path.toStringRef(path_storage);
|
|
|
|
return !root_path(p).empty();
|
|
}
|
|
|
|
bool has_relative_path(const Twine &path) {
|
|
SmallString<128> path_storage;
|
|
StringRef p = path.toStringRef(path_storage);
|
|
|
|
return !relative_path(p).empty();
|
|
}
|
|
|
|
bool has_filename(const Twine &path) {
|
|
SmallString<128> path_storage;
|
|
StringRef p = path.toStringRef(path_storage);
|
|
|
|
return !filename(p).empty();
|
|
}
|
|
|
|
bool has_parent_path(const Twine &path) {
|
|
SmallString<128> path_storage;
|
|
StringRef p = path.toStringRef(path_storage);
|
|
|
|
return !parent_path(p).empty();
|
|
}
|
|
|
|
bool has_stem(const Twine &path) {
|
|
SmallString<128> path_storage;
|
|
StringRef p = path.toStringRef(path_storage);
|
|
|
|
return !stem(p).empty();
|
|
}
|
|
|
|
bool has_extension(const Twine &path) {
|
|
SmallString<128> path_storage;
|
|
StringRef p = path.toStringRef(path_storage);
|
|
|
|
return !extension(p).empty();
|
|
}
|
|
|
|
bool is_absolute(const Twine &path) {
|
|
SmallString<128> path_storage;
|
|
StringRef p = path.toStringRef(path_storage);
|
|
|
|
bool rootDir = has_root_directory(p),
|
|
#ifdef LLVM_ON_WIN32
|
|
rootName = has_root_name(p);
|
|
#else
|
|
rootName = true;
|
|
#endif
|
|
|
|
return rootDir && rootName;
|
|
}
|
|
|
|
bool is_relative(const Twine &path) { return !is_absolute(path); }
|
|
|
|
StringRef remove_leading_dotslash(StringRef Path) {
|
|
// Remove leading "./" (or ".//" or "././" etc.)
|
|
while (Path.size() > 2 && Path[0] == '.' && is_separator(Path[1])) {
|
|
Path = Path.substr(2);
|
|
while (Path.size() > 0 && is_separator(Path[0]))
|
|
Path = Path.substr(1);
|
|
}
|
|
return Path;
|
|
}
|
|
|
|
static SmallString<256> remove_dots(StringRef path, bool remove_dot_dot) {
|
|
SmallVector<StringRef, 16> components;
|
|
|
|
// Skip the root path, then look for traversal in the components.
|
|
StringRef rel = path::relative_path(path);
|
|
for (StringRef C : llvm::make_range(path::begin(rel), path::end(rel))) {
|
|
if (C == ".")
|
|
continue;
|
|
if (remove_dot_dot) {
|
|
if (C == "..") {
|
|
if (!components.empty())
|
|
components.pop_back();
|
|
continue;
|
|
}
|
|
}
|
|
components.push_back(C);
|
|
}
|
|
|
|
SmallString<256> buffer = path::root_path(path);
|
|
for (StringRef C : components)
|
|
path::append(buffer, C);
|
|
return buffer;
|
|
}
|
|
|
|
bool remove_dots(SmallVectorImpl<char> &path, bool remove_dot_dot) {
|
|
StringRef p(path.data(), path.size());
|
|
|
|
SmallString<256> result = remove_dots(p, remove_dot_dot);
|
|
if (result == path)
|
|
return false;
|
|
|
|
path.swap(result);
|
|
return true;
|
|
}
|
|
|
|
} // end namespace path
|
|
|
|
namespace fs {
|
|
|
|
std::error_code getUniqueID(const Twine Path, UniqueID &Result) {
|
|
file_status Status;
|
|
std::error_code EC = status(Path, Status);
|
|
if (EC)
|
|
return EC;
|
|
Result = Status.getUniqueID();
|
|
return std::error_code();
|
|
}
|
|
|
|
std::error_code createUniqueFile(const Twine &Model, int &ResultFd,
|
|
SmallVectorImpl<char> &ResultPath,
|
|
unsigned Mode) {
|
|
return createUniqueEntity(Model, ResultFd, ResultPath, false, Mode, FS_File);
|
|
}
|
|
|
|
std::error_code createUniqueFile(const Twine &Model,
|
|
SmallVectorImpl<char> &ResultPath) {
|
|
int Dummy;
|
|
return createUniqueEntity(Model, Dummy, ResultPath, false, 0, FS_Name);
|
|
}
|
|
|
|
static std::error_code
|
|
createTemporaryFile(const Twine &Model, int &ResultFD,
|
|
llvm::SmallVectorImpl<char> &ResultPath, FSEntity Type) {
|
|
SmallString<128> Storage;
|
|
StringRef P = Model.toNullTerminatedStringRef(Storage);
|
|
assert(P.find_first_of(separators) == StringRef::npos &&
|
|
"Model must be a simple filename.");
|
|
// Use P.begin() so that createUniqueEntity doesn't need to recreate Storage.
|
|
return createUniqueEntity(P.begin(), ResultFD, ResultPath,
|
|
true, owner_read | owner_write, Type);
|
|
}
|
|
|
|
static std::error_code
|
|
createTemporaryFile(const Twine &Prefix, StringRef Suffix, int &ResultFD,
|
|
llvm::SmallVectorImpl<char> &ResultPath, FSEntity Type) {
|
|
const char *Middle = Suffix.empty() ? "-%%%%%%" : "-%%%%%%.";
|
|
return createTemporaryFile(Prefix + Middle + Suffix, ResultFD, ResultPath,
|
|
Type);
|
|
}
|
|
|
|
std::error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix,
|
|
int &ResultFD,
|
|
SmallVectorImpl<char> &ResultPath) {
|
|
return createTemporaryFile(Prefix, Suffix, ResultFD, ResultPath, FS_File);
|
|
}
|
|
|
|
std::error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix,
|
|
SmallVectorImpl<char> &ResultPath) {
|
|
int Dummy;
|
|
return createTemporaryFile(Prefix, Suffix, Dummy, ResultPath, FS_Name);
|
|
}
|
|
|
|
|
|
// This is a mkdtemp with a different pattern. We use createUniqueEntity mostly
|
|
// for consistency. We should try using mkdtemp.
|
|
std::error_code createUniqueDirectory(const Twine &Prefix,
|
|
SmallVectorImpl<char> &ResultPath) {
|
|
int Dummy;
|
|
return createUniqueEntity(Prefix + "-%%%%%%", Dummy, ResultPath,
|
|
true, 0, FS_Dir);
|
|
}
|
|
|
|
static std::error_code make_absolute(const Twine ¤t_directory,
|
|
SmallVectorImpl<char> &path,
|
|
bool use_current_directory) {
|
|
StringRef p(path.data(), path.size());
|
|
|
|
bool rootDirectory = path::has_root_directory(p),
|
|
#ifdef LLVM_ON_WIN32
|
|
rootName = path::has_root_name(p);
|
|
#else
|
|
rootName = true;
|
|
#endif
|
|
|
|
// Already absolute.
|
|
if (rootName && rootDirectory)
|
|
return std::error_code();
|
|
|
|
// All of the following conditions will need the current directory.
|
|
SmallString<128> current_dir;
|
|
if (use_current_directory)
|
|
current_directory.toVector(current_dir);
|
|
else if (std::error_code ec = current_path(current_dir))
|
|
return ec;
|
|
|
|
// Relative path. Prepend the current directory.
|
|
if (!rootName && !rootDirectory) {
|
|
// Append path to the current directory.
|
|
path::append(current_dir, p);
|
|
// Set path to the result.
|
|
path.swap(current_dir);
|
|
return std::error_code();
|
|
}
|
|
|
|
if (!rootName && rootDirectory) {
|
|
StringRef cdrn = path::root_name(current_dir);
|
|
SmallString<128> curDirRootName(cdrn.begin(), cdrn.end());
|
|
path::append(curDirRootName, p);
|
|
// Set path to the result.
|
|
path.swap(curDirRootName);
|
|
return std::error_code();
|
|
}
|
|
|
|
if (rootName && !rootDirectory) {
|
|
StringRef pRootName = path::root_name(p);
|
|
StringRef bRootDirectory = path::root_directory(current_dir);
|
|
StringRef bRelativePath = path::relative_path(current_dir);
|
|
StringRef pRelativePath = path::relative_path(p);
|
|
|
|
SmallString<128> res;
|
|
path::append(res, pRootName, bRootDirectory, bRelativePath, pRelativePath);
|
|
path.swap(res);
|
|
return std::error_code();
|
|
}
|
|
|
|
llvm_unreachable("All rootName and rootDirectory combinations should have "
|
|
"occurred above!");
|
|
}
|
|
|
|
std::error_code make_absolute(const Twine ¤t_directory,
|
|
SmallVectorImpl<char> &path) {
|
|
return make_absolute(current_directory, path, true);
|
|
}
|
|
|
|
std::error_code make_absolute(SmallVectorImpl<char> &path) {
|
|
return make_absolute(Twine(), path, false);
|
|
}
|
|
|
|
std::error_code create_directories(const Twine &Path, bool IgnoreExisting,
|
|
perms Perms) {
|
|
SmallString<128> PathStorage;
|
|
StringRef P = Path.toStringRef(PathStorage);
|
|
|
|
// Be optimistic and try to create the directory
|
|
std::error_code EC = create_directory(P, IgnoreExisting, Perms);
|
|
// If we succeeded, or had any error other than the parent not existing, just
|
|
// return it.
|
|
if (EC != errc::no_such_file_or_directory)
|
|
return EC;
|
|
|
|
// We failed because of a no_such_file_or_directory, try to create the
|
|
// parent.
|
|
StringRef Parent = path::parent_path(P);
|
|
if (Parent.empty())
|
|
return EC;
|
|
|
|
if ((EC = create_directories(Parent, IgnoreExisting, Perms)))
|
|
return EC;
|
|
|
|
return create_directory(P, IgnoreExisting, Perms);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
bool status_known(file_status s) {
|
|
return s.type() != file_type::status_error;
|
|
}
|
|
|
|
bool is_directory(file_status status) {
|
|
return status.type() == file_type::directory_file;
|
|
}
|
|
|
|
std::error_code is_directory(const Twine &path, bool &result) {
|
|
file_status st;
|
|
if (std::error_code ec = status(path, st))
|
|
return ec;
|
|
result = is_directory(st);
|
|
return std::error_code();
|
|
}
|
|
|
|
bool is_regular_file(file_status status) {
|
|
return status.type() == file_type::regular_file;
|
|
}
|
|
|
|
std::error_code is_regular_file(const Twine &path, bool &result) {
|
|
file_status st;
|
|
if (std::error_code ec = status(path, st))
|
|
return ec;
|
|
result = is_regular_file(st);
|
|
return std::error_code();
|
|
}
|
|
|
|
bool is_other(file_status status) {
|
|
return exists(status) &&
|
|
!is_regular_file(status) &&
|
|
!is_directory(status);
|
|
}
|
|
|
|
std::error_code is_other(const Twine &Path, bool &Result) {
|
|
file_status FileStatus;
|
|
if (std::error_code EC = status(Path, FileStatus))
|
|
return EC;
|
|
Result = is_other(FileStatus);
|
|
return std::error_code();
|
|
}
|
|
|
|
void directory_entry::replace_filename(const Twine &filename, file_status st) {
|
|
SmallString<128> path = path::parent_path(Path);
|
|
path::append(path, filename);
|
|
Path = path.str();
|
|
Status = st;
|
|
}
|
|
|
|
/// @brief Identify the magic in magic.
|
|
file_magic identify_magic(StringRef Magic) {
|
|
if (Magic.size() < 4)
|
|
return file_magic::unknown;
|
|
switch ((unsigned char)Magic[0]) {
|
|
case 0x00: {
|
|
// COFF bigobj or short import library file
|
|
if (Magic[1] == (char)0x00 && Magic[2] == (char)0xff &&
|
|
Magic[3] == (char)0xff) {
|
|
size_t MinSize = offsetof(COFF::BigObjHeader, UUID) + sizeof(COFF::BigObjMagic);
|
|
if (Magic.size() < MinSize)
|
|
return file_magic::coff_import_library;
|
|
|
|
int BigObjVersion = read16le(
|
|
Magic.data() + offsetof(COFF::BigObjHeader, Version));
|
|
if (BigObjVersion < COFF::BigObjHeader::MinBigObjectVersion)
|
|
return file_magic::coff_import_library;
|
|
|
|
const char *Start = Magic.data() + offsetof(COFF::BigObjHeader, UUID);
|
|
if (memcmp(Start, COFF::BigObjMagic, sizeof(COFF::BigObjMagic)) != 0)
|
|
return file_magic::coff_import_library;
|
|
return file_magic::coff_object;
|
|
}
|
|
// Windows resource file
|
|
const char Expected[] = { 0, 0, 0, 0, '\x20', 0, 0, 0, '\xff' };
|
|
if (Magic.size() >= sizeof(Expected) &&
|
|
memcmp(Magic.data(), Expected, sizeof(Expected)) == 0)
|
|
return file_magic::windows_resource;
|
|
// 0x0000 = COFF unknown machine type
|
|
if (Magic[1] == 0)
|
|
return file_magic::coff_object;
|
|
break;
|
|
}
|
|
case 0xDE: // 0x0B17C0DE = BC wraper
|
|
if (Magic[1] == (char)0xC0 && Magic[2] == (char)0x17 &&
|
|
Magic[3] == (char)0x0B)
|
|
return file_magic::bitcode;
|
|
break;
|
|
case 'B':
|
|
if (Magic[1] == 'C' && Magic[2] == (char)0xC0 && Magic[3] == (char)0xDE)
|
|
return file_magic::bitcode;
|
|
break;
|
|
case '!':
|
|
if (Magic.size() >= 8)
|
|
if (memcmp(Magic.data(), "!<arch>\n", 8) == 0 ||
|
|
memcmp(Magic.data(), "!<thin>\n", 8) == 0)
|
|
return file_magic::archive;
|
|
break;
|
|
|
|
case '\177':
|
|
if (Magic.size() >= 18 && Magic[1] == 'E' && Magic[2] == 'L' &&
|
|
Magic[3] == 'F') {
|
|
bool Data2MSB = Magic[5] == 2;
|
|
unsigned high = Data2MSB ? 16 : 17;
|
|
unsigned low = Data2MSB ? 17 : 16;
|
|
if (Magic[high] == 0)
|
|
switch (Magic[low]) {
|
|
default: return file_magic::elf;
|
|
case 1: return file_magic::elf_relocatable;
|
|
case 2: return file_magic::elf_executable;
|
|
case 3: return file_magic::elf_shared_object;
|
|
case 4: return file_magic::elf_core;
|
|
}
|
|
else
|
|
// It's still some type of ELF file.
|
|
return file_magic::elf;
|
|
}
|
|
break;
|
|
|
|
case 0xCA:
|
|
if (Magic[1] == char(0xFE) && Magic[2] == char(0xBA) &&
|
|
Magic[3] == char(0xBE)) {
|
|
// This is complicated by an overlap with Java class files.
|
|
// See the Mach-O section in /usr/share/file/magic for details.
|
|
if (Magic.size() >= 8 && Magic[7] < 43)
|
|
return file_magic::macho_universal_binary;
|
|
}
|
|
break;
|
|
|
|
// The two magic numbers for mach-o are:
|
|
// 0xfeedface - 32-bit mach-o
|
|
// 0xfeedfacf - 64-bit mach-o
|
|
case 0xFE:
|
|
case 0xCE:
|
|
case 0xCF: {
|
|
uint16_t type = 0;
|
|
if (Magic[0] == char(0xFE) && Magic[1] == char(0xED) &&
|
|
Magic[2] == char(0xFA) &&
|
|
(Magic[3] == char(0xCE) || Magic[3] == char(0xCF))) {
|
|
/* Native endian */
|
|
size_t MinSize;
|
|
if (Magic[3] == char(0xCE))
|
|
MinSize = sizeof(MachO::mach_header);
|
|
else
|
|
MinSize = sizeof(MachO::mach_header_64);
|
|
if (Magic.size() >= MinSize)
|
|
type = Magic[12] << 24 | Magic[13] << 12 | Magic[14] << 8 | Magic[15];
|
|
} else if ((Magic[0] == char(0xCE) || Magic[0] == char(0xCF)) &&
|
|
Magic[1] == char(0xFA) && Magic[2] == char(0xED) &&
|
|
Magic[3] == char(0xFE)) {
|
|
/* Reverse endian */
|
|
size_t MinSize;
|
|
if (Magic[0] == char(0xCE))
|
|
MinSize = sizeof(MachO::mach_header);
|
|
else
|
|
MinSize = sizeof(MachO::mach_header_64);
|
|
if (Magic.size() >= MinSize)
|
|
type = Magic[15] << 24 | Magic[14] << 12 |Magic[13] << 8 | Magic[12];
|
|
}
|
|
switch (type) {
|
|
default: break;
|
|
case 1: return file_magic::macho_object;
|
|
case 2: return file_magic::macho_executable;
|
|
case 3: return file_magic::macho_fixed_virtual_memory_shared_lib;
|
|
case 4: return file_magic::macho_core;
|
|
case 5: return file_magic::macho_preload_executable;
|
|
case 6: return file_magic::macho_dynamically_linked_shared_lib;
|
|
case 7: return file_magic::macho_dynamic_linker;
|
|
case 8: return file_magic::macho_bundle;
|
|
case 9: return file_magic::macho_dynamically_linked_shared_lib_stub;
|
|
case 10: return file_magic::macho_dsym_companion;
|
|
case 11: return file_magic::macho_kext_bundle;
|
|
}
|
|
break;
|
|
}
|
|
case 0xF0: // PowerPC Windows
|
|
case 0x83: // Alpha 32-bit
|
|
case 0x84: // Alpha 64-bit
|
|
case 0x66: // MPS R4000 Windows
|
|
case 0x50: // mc68K
|
|
case 0x4c: // 80386 Windows
|
|
case 0xc4: // ARMNT Windows
|
|
if (Magic[1] == 0x01)
|
|
return file_magic::coff_object;
|
|
|
|
case 0x90: // PA-RISC Windows
|
|
case 0x68: // mc68K Windows
|
|
if (Magic[1] == 0x02)
|
|
return file_magic::coff_object;
|
|
break;
|
|
|
|
case 'M': // Possible MS-DOS stub on Windows PE file
|
|
if (Magic[1] == 'Z') {
|
|
uint32_t off = read32le(Magic.data() + 0x3c);
|
|
// PE/COFF file, either EXE or DLL.
|
|
if (off < Magic.size() &&
|
|
memcmp(Magic.data()+off, COFF::PEMagic, sizeof(COFF::PEMagic)) == 0)
|
|
return file_magic::pecoff_executable;
|
|
}
|
|
break;
|
|
|
|
case 0x64: // x86-64 Windows.
|
|
if (Magic[1] == char(0x86))
|
|
return file_magic::coff_object;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return file_magic::unknown;
|
|
}
|
|
|
|
std::error_code identify_magic(const Twine &Path, file_magic &Result) {
|
|
int FD;
|
|
if (std::error_code EC = openFileForRead(Path, FD))
|
|
return EC;
|
|
|
|
char Buffer[32];
|
|
int Length = read(FD, Buffer, sizeof(Buffer));
|
|
if (close(FD) != 0 || Length < 0)
|
|
return std::error_code(errno, std::generic_category());
|
|
|
|
Result = identify_magic(StringRef(Buffer, Length));
|
|
return std::error_code();
|
|
}
|
|
|
|
std::error_code directory_entry::status(file_status &result) const {
|
|
return fs::status(Path, result);
|
|
}
|
|
|
|
} // end namespace fs
|
|
} // end namespace sys
|
|
} // end namespace llvm
|
|
|
|
// Include the truly platform-specific parts.
|
|
#if defined(LLVM_ON_UNIX)
|
|
#include "Unix/Path.inc"
|
|
#endif
|
|
#if defined(LLVM_ON_WIN32)
|
|
#include "Windows/Path.inc"
|
|
#endif
|
|
|
|
namespace llvm {
|
|
namespace sys {
|
|
namespace path {
|
|
|
|
bool user_cache_directory(SmallVectorImpl<char> &Result, const Twine &Path1,
|
|
const Twine &Path2, const Twine &Path3) {
|
|
if (getUserCacheDir(Result)) {
|
|
append(Result, Path1, Path2, Path3);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
} // end namespace path
|
|
} // end namsspace sys
|
|
} // end namespace llvm
|