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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19852 91177308-0d34-0410-b5e6-96231b3b80d8
785 lines
20 KiB
C++
785 lines
20 KiB
C++
//===- llvm/System/Linux/Path.cpp - Linux Path Implementation ---*- 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 Reid Spencer and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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// Modified by Henrik Bach to comply with at least MinGW.
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// Ported to Win32 by Jeff Cohen.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides the Win32 specific implementation of the Path class.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only generic Win32 code that
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//=== is guaranteed to work on *all* Win32 variants.
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//===----------------------------------------------------------------------===//
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#include "Win32.h"
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#include <malloc.h>
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// We need to undo a macro defined in Windows.h, otherwise we won't compile:
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#undef CopyFile
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static void FlipBackSlashes(std::string& s) {
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for (size_t i = 0; i < s.size(); i++)
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if (s[i] == '\\')
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s[i] = '/';
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}
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namespace llvm {
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namespace sys {
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bool
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Path::isValid() const {
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if (path.empty())
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return false;
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// If there is a colon, it must be the second character, preceded by a letter
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// and followed by something.
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size_t len = path.size();
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size_t pos = path.rfind(':',len);
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if (pos != std::string::npos) {
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if (pos != 1 || !isalpha(path[0]) || len < 3)
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return false;
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}
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// Check for illegal characters.
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if (path.find_first_of("\\<>\"|\001\002\003\004\005\006\007\010\011\012"
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"\013\014\015\016\017\020\021\022\023\024\025\026"
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"\027\030\031\032\033\034\035\036\037")
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!= std::string::npos)
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return false;
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// Check each component for legality.
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for (pos = 0; pos < len; ++pos) {
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// A component may not end in a space.
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if (path[pos] == ' ') {
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if (path[pos+1] == '/' || path[pos+1] == '\0')
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return false;
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}
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// A component may not end in a period.
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if (path[pos] == '.') {
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if (path[pos+1] == '/' || path[pos+1] == '\0') {
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// Unless it is the pseudo-directory "."...
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if (pos == 0 || path[pos-1] == '/' || path[pos-1] == ':')
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return true;
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// or "..".
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if (pos > 0 && path[pos-1] == '.') {
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if (pos == 1 || path[pos-2] == '/' || path[pos-2] == ':')
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return true;
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}
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return false;
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}
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}
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}
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return true;
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}
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static Path *TempDirectory = NULL;
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Path
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Path::GetTemporaryDirectory() {
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if (TempDirectory)
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return *TempDirectory;
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char pathname[MAX_PATH];
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if (!GetTempPath(MAX_PATH, pathname))
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throw std::string("Can't determine temporary directory");
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Path result;
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result.setDirectory(pathname);
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// Append a subdirectory passed on our process id so multiple LLVMs don't
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// step on each other's toes.
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sprintf(pathname, "LLVM_%u", GetCurrentProcessId());
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result.appendDirectory(pathname);
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// If there's a directory left over from a previous LLVM execution that
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// happened to have the same process id, get rid of it.
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result.destroyDirectory(true);
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// And finally (re-)create the empty directory.
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result.createDirectory(false);
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TempDirectory = new Path(result);
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return *TempDirectory;
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}
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Path::Path(const std::string& unverified_path)
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: path(unverified_path)
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{
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FlipBackSlashes(path);
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if (unverified_path.empty())
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return;
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if (this->isValid())
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return;
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// oops, not valid.
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path.clear();
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throw std::string(unverified_path + ": path is not valid");
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}
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// FIXME: the following set of functions don't map to Windows very well.
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Path
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Path::GetRootDirectory() {
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Path result;
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result.setDirectory("/");
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return result;
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}
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static void getPathList(const char*path, std::vector<sys::Path>& Paths) {
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const char* at = path;
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const char* delim = strchr(at, ';');
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Path tmpPath;
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while( delim != 0 ) {
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std::string tmp(at, size_t(delim-at));
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if (tmpPath.setDirectory(tmp))
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if (tmpPath.readable())
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Paths.push_back(tmpPath);
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at = delim + 1;
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delim = strchr(at, ';');
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}
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if (*at != 0)
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if (tmpPath.setDirectory(std::string(at)))
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if (tmpPath.readable())
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Paths.push_back(tmpPath);
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}
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void
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Path::GetSystemLibraryPaths(std::vector<sys::Path>& Paths) {
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Paths.push_back(sys::Path("C:\\WINDOWS\\SYSTEM32\\"));
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Paths.push_back(sys::Path("C:\\WINDOWS\\"));
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}
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void
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Path::GetBytecodeLibraryPaths(std::vector<sys::Path>& Paths) {
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char * env_var = getenv("LLVM_LIB_SEARCH_PATH");
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if (env_var != 0) {
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getPathList(env_var,Paths);
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}
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#ifdef LLVM_LIBDIR
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{
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Path tmpPath;
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if (tmpPath.setDirectory(LLVM_LIBDIR))
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if (tmpPath.readable())
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Paths.push_back(tmpPath);
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}
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#endif
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GetSystemLibraryPaths(Paths);
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}
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Path
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Path::GetLLVMDefaultConfigDir() {
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// TODO: this isn't going to fly on Windows
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return Path("/etc/llvm/");
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}
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Path
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Path::GetUserHomeDirectory() {
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// TODO: Typical Windows setup doesn't define HOME.
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const char* home = getenv("HOME");
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if (home) {
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Path result;
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if (result.setDirectory(home))
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return result;
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}
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return GetRootDirectory();
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}
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// FIXME: the above set of functions don't map to Windows very well.
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bool
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Path::isFile() const {
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return (isValid() && path[path.length()-1] != '/');
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}
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bool
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Path::isDirectory() const {
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return (isValid() && path[path.length()-1] == '/');
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}
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std::string
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Path::getBasename() const {
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// Find the last slash
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size_t slash = path.rfind('/');
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if (slash == std::string::npos)
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slash = 0;
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else
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slash++;
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return path.substr(slash, path.rfind('.'));
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}
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bool Path::hasMagicNumber(const std::string &Magic) const {
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std::string actualMagic;
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if (getMagicNumber(actualMagic, Magic.size()))
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return Magic == actualMagic;
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return false;
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}
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bool
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Path::isBytecodeFile() const {
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std::string actualMagic;
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if (!getMagicNumber(actualMagic, 4))
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return false;
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return actualMagic == "llvc" || actualMagic == "llvm";
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}
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bool
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Path::exists() const {
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DWORD attr = GetFileAttributes(path.c_str());
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return attr != INVALID_FILE_ATTRIBUTES;
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}
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bool
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Path::readable() const {
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// FIXME: take security attributes into account.
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DWORD attr = GetFileAttributes(path.c_str());
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return attr != INVALID_FILE_ATTRIBUTES;
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}
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bool
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Path::writable() const {
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// FIXME: take security attributes into account.
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DWORD attr = GetFileAttributes(path.c_str());
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return (attr != INVALID_FILE_ATTRIBUTES) && !(attr & FILE_ATTRIBUTE_READONLY);
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}
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bool
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Path::executable() const {
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// FIXME: take security attributes into account.
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DWORD attr = GetFileAttributes(path.c_str());
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return attr != INVALID_FILE_ATTRIBUTES;
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}
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std::string
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Path::getLast() const {
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// Find the last slash
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size_t pos = path.rfind('/');
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// Handle the corner cases
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if (pos == std::string::npos)
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return path;
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// If the last character is a slash
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if (pos == path.length()-1) {
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// Find the second to last slash
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size_t pos2 = path.rfind('/', pos-1);
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if (pos2 == std::string::npos)
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return path.substr(0,pos);
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else
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return path.substr(pos2+1,pos-pos2-1);
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}
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// Return everything after the last slash
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return path.substr(pos+1);
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}
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void
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Path::getStatusInfo(StatusInfo& info) const {
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WIN32_FILE_ATTRIBUTE_DATA fi;
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if (!GetFileAttributesEx(path.c_str(), GetFileExInfoStandard, &fi))
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ThrowError(std::string(path) + ": Can't get status: ");
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info.fileSize = fi.nFileSizeHigh;
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info.fileSize <<= 32;
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info.fileSize += fi.nFileSizeLow;
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info.mode = fi.dwFileAttributes & FILE_ATTRIBUTE_READONLY ? 0555 : 0777;
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info.user = 9999; // Not applicable to Windows, so...
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info.group = 9999; // Not applicable to Windows, so...
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__int64 ft = *reinterpret_cast<__int64*>(&fi.ftLastWriteTime);
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info.modTime.fromWin32Time(ft);
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info.isDir = fi.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
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if (info.isDir && path[path.length() - 1] != '/')
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path += '/';
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else if (!info.isDir && path[path.length() - 1] == '/')
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path.erase(path.length() - 1);
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}
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static bool AddPermissionBits(const std::string& Filename, int bits) {
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DWORD attr = GetFileAttributes(Filename.c_str());
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// If it doesn't exist, we're done.
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if (attr == INVALID_FILE_ATTRIBUTES)
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return false;
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// The best we can do to interpret Unix permission bits is to use
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// the owner writable bit.
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if ((attr & FILE_ATTRIBUTE_READONLY) && (bits & 0200)) {
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if (!SetFileAttributes(Filename.c_str(), attr & ~FILE_ATTRIBUTE_READONLY))
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ThrowError(Filename + ": SetFileAttributes: ");
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}
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return true;
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}
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void Path::makeReadable() {
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// All files are readable on Windows (ignoring security attributes).
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}
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void Path::makeWriteable() {
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DWORD attr = GetFileAttributes(path.c_str());
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// If it doesn't exist, we're done.
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if (attr == INVALID_FILE_ATTRIBUTES)
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return;
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if (attr & FILE_ATTRIBUTE_READONLY) {
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if (!SetFileAttributes(path.c_str(), attr & ~FILE_ATTRIBUTE_READONLY))
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ThrowError(std::string(path) + ": Can't make file writable: ");
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}
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}
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void Path::makeExecutable() {
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// All files are executable on Windows (ignoring security attributes).
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}
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bool
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Path::getDirectoryContents(std::set<Path>& result) const {
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if (!isDirectory())
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return false;
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result.clear();
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WIN32_FIND_DATA fd;
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std::string searchpath = path + "*";
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HANDLE h = FindFirstFile(searchpath.c_str(), &fd);
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if (h == INVALID_HANDLE_VALUE) {
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if (GetLastError() == ERROR_FILE_NOT_FOUND)
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return true; // not really an error, now is it?
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ThrowError(path + ": Can't read directory: ");
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}
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do {
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if (fd.cFileName[0] == '.')
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continue;
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Path aPath(path + &fd.cFileName[0]);
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if (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
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aPath.path += "/";
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result.insert(aPath);
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} while (FindNextFile(h, &fd));
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DWORD err = GetLastError();
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FindClose(h);
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if (err != ERROR_NO_MORE_FILES) {
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SetLastError(err);
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ThrowError(path + ": Can't read directory: ");
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}
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return true;
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}
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bool
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Path::setDirectory(const std::string& a_path) {
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if (a_path.size() == 0)
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return false;
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Path save(*this);
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path = a_path;
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FlipBackSlashes(path);
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size_t last = a_path.size() -1;
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if (a_path[last] != '/')
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path += '/';
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if (!isValid()) {
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path = save.path;
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return false;
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}
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return true;
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}
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bool
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Path::setFile(const std::string& a_path) {
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if (a_path.size() == 0)
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return false;
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Path save(*this);
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path = a_path;
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FlipBackSlashes(path);
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size_t last = a_path.size() - 1;
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while (last > 0 && a_path[last] == '/')
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last--;
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path.erase(last+1);
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if (!isValid()) {
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path = save.path;
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return false;
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}
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return true;
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}
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bool
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Path::appendDirectory(const std::string& dir) {
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if (isFile())
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return false;
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Path save(*this);
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path += dir;
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path += "/";
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if (!isValid()) {
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path = save.path;
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return false;
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}
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return true;
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}
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bool
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Path::elideDirectory() {
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if (isFile())
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return false;
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size_t slashpos = path.rfind('/',path.size());
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if (slashpos == 0 || slashpos == std::string::npos)
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return false;
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if (slashpos == path.size() - 1)
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slashpos = path.rfind('/',slashpos-1);
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if (slashpos == std::string::npos)
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return false;
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path.erase(slashpos);
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return true;
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}
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bool
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Path::appendFile(const std::string& file) {
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if (!isDirectory())
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return false;
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Path save(*this);
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path += file;
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if (!isValid()) {
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path = save.path;
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return false;
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}
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return true;
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}
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bool
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Path::elideFile() {
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if (isDirectory())
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return false;
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size_t slashpos = path.rfind('/',path.size());
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if (slashpos == std::string::npos)
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return false;
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path.erase(slashpos+1);
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return true;
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}
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bool
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Path::appendSuffix(const std::string& suffix) {
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if (isDirectory())
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return false;
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Path save(*this);
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path.append(".");
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path.append(suffix);
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if (!isValid()) {
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path = save.path;
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return false;
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}
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return true;
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}
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bool
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Path::elideSuffix() {
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if (isDirectory()) return false;
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size_t dotpos = path.rfind('.',path.size());
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size_t slashpos = path.rfind('/',path.size());
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if (slashpos != std::string::npos && dotpos != std::string::npos &&
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dotpos > slashpos) {
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path.erase(dotpos, path.size()-dotpos);
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return true;
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}
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return false;
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}
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bool
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Path::createDirectory( bool create_parents) {
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// Make sure we're dealing with a directory
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if (!isDirectory()) return false;
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// Get a writeable copy of the path name
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char *pathname = reinterpret_cast<char *>(_alloca(path.length()+1));
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path.copy(pathname,path.length());
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pathname[path.length()] = 0;
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// Determine starting point for initial / search.
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char *next = pathname;
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if (pathname[0] == '/' && pathname[1] == '/') {
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// Skip host name.
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next = strchr(pathname+2, '/');
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if (next == NULL)
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throw std::string(pathname) + ": badly formed remote directory";
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// Skip share name.
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next = strchr(next+1, '/');
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if (next == NULL)
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throw std::string(pathname) + ": badly formed remote directory";
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next++;
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if (*next == 0)
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throw std::string(pathname) + ": badly formed remote directory";
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} else {
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if (pathname[1] == ':')
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next += 2; // skip drive letter
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if (*next == '/')
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next++; // skip root directory
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}
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// If we're supposed to create intermediate directories
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if (create_parents) {
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// Loop through the directory components until we're done
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while (*next) {
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next = strchr(next, '/');
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*next = 0;
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if (!CreateDirectory(pathname, NULL))
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ThrowError(std::string(pathname) + ": Can't create directory: ");
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*next++ = '/';
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}
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} else {
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// Drop trailing slash.
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pathname[path.size()-1] = 0;
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if (!CreateDirectory(pathname, NULL)) {
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ThrowError(std::string(pathname) + ": Can't create directory: ");
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}
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}
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return true;
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}
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bool
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Path::createFile() {
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// Make sure we're dealing with a file
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if (!isFile()) return false;
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// Create the file
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HANDLE h = CreateFile(path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_NEW,
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FILE_ATTRIBUTE_NORMAL, NULL);
|
|
if (h == INVALID_HANDLE_VALUE)
|
|
ThrowError(path + ": Can't create file: ");
|
|
|
|
CloseHandle(h);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
Path::destroyDirectory(bool remove_contents) const {
|
|
// Make sure we're dealing with a directory
|
|
if (!isDirectory()) return false;
|
|
|
|
// If it doesn't exist, we're done.
|
|
if (!exists()) return true;
|
|
|
|
char *pathname = reinterpret_cast<char *>(_alloca(path.length()+2));
|
|
int lastchar = path.length() - 1 ;
|
|
path.copy(pathname,lastchar+2);
|
|
|
|
// Make path end with '/*'.
|
|
pathname[lastchar+1] = '*';
|
|
pathname[lastchar+2] = 0;
|
|
|
|
if (remove_contents) {
|
|
WIN32_FIND_DATA fd;
|
|
HANDLE h = FindFirstFile(pathname, &fd);
|
|
|
|
// It's a bad idea to alter the contents of a directory while enumerating
|
|
// its contents. So build a list of its contents first, then destroy them.
|
|
|
|
if (h != INVALID_HANDLE_VALUE) {
|
|
std::vector<Path> list;
|
|
|
|
do {
|
|
if (strcmp(fd.cFileName, ".") == 0)
|
|
continue;
|
|
if (strcmp(fd.cFileName, "..") == 0)
|
|
continue;
|
|
|
|
Path aPath(path + &fd.cFileName[0]);
|
|
if (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
|
|
aPath.path += "/";
|
|
list.push_back(aPath);
|
|
} while (FindNextFile(h, &fd));
|
|
|
|
DWORD err = GetLastError();
|
|
FindClose(h);
|
|
if (err != ERROR_NO_MORE_FILES) {
|
|
SetLastError(err);
|
|
ThrowError(path + ": Can't read directory: ");
|
|
}
|
|
|
|
for (std::vector<Path>::iterator I = list.begin(); I != list.end(); ++I) {
|
|
Path &aPath = *I;
|
|
if (aPath.isDirectory())
|
|
aPath.destroyDirectory(true);
|
|
else
|
|
aPath.destroyFile();
|
|
}
|
|
} else {
|
|
if (GetLastError() != ERROR_FILE_NOT_FOUND)
|
|
ThrowError(path + ": Can't read directory: ");
|
|
}
|
|
}
|
|
|
|
pathname[lastchar] = 0;
|
|
if (!RemoveDirectory(pathname))
|
|
ThrowError(std::string(pathname) + ": Can't destroy directory: ");
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
Path::destroyFile() const {
|
|
if (!isFile()) return false;
|
|
|
|
DWORD attr = GetFileAttributes(path.c_str());
|
|
|
|
// If it doesn't exist, we're done.
|
|
if (attr == INVALID_FILE_ATTRIBUTES)
|
|
return true;
|
|
|
|
// Read-only files cannot be deleted on Windows. Must remove the read-only
|
|
// attribute first.
|
|
if (attr & FILE_ATTRIBUTE_READONLY) {
|
|
if (!SetFileAttributes(path.c_str(), attr & ~FILE_ATTRIBUTE_READONLY))
|
|
ThrowError(path + ": Can't destroy file: ");
|
|
}
|
|
|
|
if (!DeleteFile(path.c_str()))
|
|
ThrowError(path + ": Can't destroy file: ");
|
|
return true;
|
|
}
|
|
|
|
bool Path::getMagicNumber(std::string& Magic, unsigned len) const {
|
|
if (!isFile())
|
|
return false;
|
|
assert(len < 1024 && "Request for magic string too long");
|
|
char* buf = (char*) alloca(1 + len);
|
|
|
|
HANDLE h = CreateFile(path.c_str(),
|
|
GENERIC_READ,
|
|
FILE_SHARE_READ,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
FILE_ATTRIBUTE_NORMAL,
|
|
NULL);
|
|
if (h == INVALID_HANDLE_VALUE)
|
|
return false;
|
|
|
|
DWORD nRead = 0;
|
|
BOOL ret = ReadFile(h, buf, len, &nRead, NULL);
|
|
CloseHandle(h);
|
|
|
|
if (!ret || nRead != len)
|
|
return false;
|
|
|
|
buf[len] = '\0';
|
|
Magic = buf;
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
Path::renameFile(const Path& newName) {
|
|
if (!isFile()) return false;
|
|
if (!MoveFile(path.c_str(), newName.c_str()))
|
|
ThrowError("Can't move '" + path +
|
|
"' to '" + newName.path + "': ");
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
Path::setStatusInfo(const StatusInfo& si) const {
|
|
if (!isFile()) return false;
|
|
|
|
HANDLE h = CreateFile(path.c_str(),
|
|
FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES,
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
FILE_ATTRIBUTE_NORMAL,
|
|
NULL);
|
|
if (h == INVALID_HANDLE_VALUE)
|
|
return false;
|
|
|
|
BY_HANDLE_FILE_INFORMATION bhfi;
|
|
if (!GetFileInformationByHandle(h, &bhfi)) {
|
|
DWORD err = GetLastError();
|
|
CloseHandle(h);
|
|
SetLastError(err);
|
|
ThrowError(path + ": GetFileInformationByHandle: ");
|
|
}
|
|
|
|
FILETIME ft;
|
|
(uint64_t&)ft = si.modTime.toWin32Time();
|
|
BOOL ret = SetFileTime(h, NULL, &ft, &ft);
|
|
DWORD err = GetLastError();
|
|
CloseHandle(h);
|
|
if (!ret) {
|
|
SetLastError(err);
|
|
ThrowError(path + ": SetFileTime: ");
|
|
}
|
|
|
|
// Best we can do with Unix permission bits is to interpret the owner
|
|
// writable bit.
|
|
if (si.mode & 0200) {
|
|
if (bhfi.dwFileAttributes & FILE_ATTRIBUTE_READONLY) {
|
|
if (!SetFileAttributes(path.c_str(),
|
|
bhfi.dwFileAttributes & ~FILE_ATTRIBUTE_READONLY))
|
|
ThrowError(path + ": SetFileAttributes: ");
|
|
}
|
|
} else {
|
|
if (!(bhfi.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) {
|
|
if (!SetFileAttributes(path.c_str(),
|
|
bhfi.dwFileAttributes | FILE_ATTRIBUTE_READONLY))
|
|
ThrowError(path + ": SetFileAttributes: ");
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
sys::CopyFile(const sys::Path &Dest, const sys::Path &Src) {
|
|
// Can't use CopyFile macro defined in Windows.h because it would mess up the
|
|
// above line. We use the expansion it would have in a non-UNICODE build.
|
|
if (!::CopyFileA(Src.c_str(), Dest.c_str(), false))
|
|
ThrowError("Can't copy '" + Src.toString() +
|
|
"' to '" + Dest.toString() + "': ");
|
|
}
|
|
|
|
void
|
|
Path::makeUnique(bool reuse_current) {
|
|
if (reuse_current && !exists())
|
|
return; // File doesn't exist already, just use it!
|
|
|
|
// Reserve space for -XXXXXX at the end.
|
|
char *FNBuffer = (char*) alloca(path.size()+8);
|
|
unsigned offset = path.size();
|
|
path.copy(FNBuffer, offset);
|
|
|
|
// Find a numeric suffix that isn't used by an existing file.
|
|
static unsigned FCounter = 0;
|
|
do {
|
|
sprintf(FNBuffer+offset, "-%06u", FCounter);
|
|
if (++FCounter > 999999)
|
|
FCounter = 0;
|
|
path = FNBuffer;
|
|
} while (exists());
|
|
}
|
|
|
|
bool
|
|
Path::createTemporaryFile(bool reuse_current) {
|
|
// Make sure we're dealing with a file
|
|
if (!isFile())
|
|
return false;
|
|
|
|
// Make this into a unique file name
|
|
makeUnique( reuse_current );
|
|
|
|
// Now go and create it
|
|
HANDLE h = CreateFile(path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_NEW,
|
|
FILE_ATTRIBUTE_NORMAL, NULL);
|
|
if (h == INVALID_HANDLE_VALUE)
|
|
return false;
|
|
|
|
CloseHandle(h);
|
|
return true;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
|
|
|