mirror of
https://github.com/c64scene-ar/llvm-6502.git
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7ae606a2a8
Original commit message: Support/FileSystem: Implement canonicalize. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146378 91177308-0d34-0410-b5e6-96231b3b80d8
749 lines
24 KiB
C++
749 lines
24 KiB
C++
//===- llvm/Support/Windows/PathV2.inc - Windows Path Impl ------*- C++ -*-===//
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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 Windows specific implementation of the PathV2 API.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only generic Windows code that
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//=== is guaranteed to work on *all* Windows variants.
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//===----------------------------------------------------------------------===//
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#include "Windows.h"
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#include <fcntl.h>
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#include <io.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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// MinGW doesn't define this.
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#ifndef _ERRNO_T_DEFINED
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#define _ERRNO_T_DEFINED
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typedef int errno_t;
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#endif
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using namespace llvm;
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namespace {
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typedef BOOLEAN (WINAPI *PtrCreateSymbolicLinkW)(
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/*__in*/ LPCWSTR lpSymlinkFileName,
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/*__in*/ LPCWSTR lpTargetFileName,
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/*__in*/ DWORD dwFlags);
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PtrCreateSymbolicLinkW create_symbolic_link_api = PtrCreateSymbolicLinkW(
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::GetProcAddress(::GetModuleHandleA("kernel32.dll"),
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"CreateSymbolicLinkW"));
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error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16) {
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int len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
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utf8.begin(), utf8.size(),
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utf16.begin(), 0);
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if (len == 0)
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return windows_error(::GetLastError());
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utf16.reserve(len + 1);
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utf16.set_size(len);
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len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
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utf8.begin(), utf8.size(),
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utf16.begin(), utf16.size());
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if (len == 0)
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return windows_error(::GetLastError());
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// Make utf16 null terminated.
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utf16.push_back(0);
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utf16.pop_back();
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return success;
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}
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error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
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SmallVectorImpl<char> &utf8) {
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// Get length.
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int len = ::WideCharToMultiByte(CP_UTF8, 0,
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utf16, utf16_len,
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utf8.begin(), 0,
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NULL, NULL);
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if (len == 0)
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return windows_error(::GetLastError());
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utf8.reserve(len);
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utf8.set_size(len);
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// Now do the actual conversion.
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len = ::WideCharToMultiByte(CP_UTF8, 0,
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utf16, utf16_len,
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utf8.data(), utf8.size(),
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NULL, NULL);
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if (len == 0)
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return windows_error(::GetLastError());
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// Make utf8 null terminated.
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utf8.push_back(0);
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utf8.pop_back();
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return success;
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}
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error_code TempDir(SmallVectorImpl<wchar_t> &result) {
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retry_temp_dir:
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DWORD len = ::GetTempPathW(result.capacity(), result.begin());
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if (len == 0)
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return windows_error(::GetLastError());
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if (len > result.capacity()) {
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result.reserve(len);
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goto retry_temp_dir;
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}
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result.set_size(len);
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return success;
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}
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bool is_separator(const wchar_t value) {
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switch (value) {
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case L'\\':
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case L'/':
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return true;
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default:
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return false;
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}
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}
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}
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namespace llvm {
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namespace sys {
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namespace fs {
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error_code current_path(SmallVectorImpl<char> &result) {
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SmallVector<wchar_t, 128> cur_path;
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cur_path.reserve(128);
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retry_cur_dir:
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DWORD len = ::GetCurrentDirectoryW(cur_path.capacity(), cur_path.data());
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// A zero return value indicates a failure other than insufficient space.
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if (len == 0)
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return windows_error(::GetLastError());
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// If there's insufficient space, the len returned is larger than the len
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// given.
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if (len > cur_path.capacity()) {
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cur_path.reserve(len);
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goto retry_cur_dir;
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}
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cur_path.set_size(len);
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// cur_path now holds the current directory in utf-16. Convert to utf-8.
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// Find out how much space we need. Sadly, this function doesn't return the
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// size needed unless you tell it the result size is 0, which means you
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// _always_ have to call it twice.
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len = ::WideCharToMultiByte(CP_UTF8, 0,
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cur_path.data(), cur_path.size(),
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result.data(), 0,
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NULL, NULL);
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if (len == 0)
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return make_error_code(windows_error(::GetLastError()));
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result.reserve(len);
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result.set_size(len);
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// Now do the actual conversion.
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len = ::WideCharToMultiByte(CP_UTF8, 0,
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cur_path.data(), cur_path.size(),
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result.data(), result.size(),
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NULL, NULL);
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if (len == 0)
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return windows_error(::GetLastError());
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return success;
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}
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error_code copy_file(const Twine &from, const Twine &to, copy_option copt) {
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// Get arguments.
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SmallString<128> from_storage;
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SmallString<128> to_storage;
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StringRef f = from.toStringRef(from_storage);
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StringRef t = to.toStringRef(to_storage);
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// Convert to utf-16.
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SmallVector<wchar_t, 128> wide_from;
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SmallVector<wchar_t, 128> wide_to;
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if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
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if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
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// Copy the file.
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BOOL res = ::CopyFileW(wide_from.begin(), wide_to.begin(),
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copt != copy_option::overwrite_if_exists);
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if (res == 0)
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return windows_error(::GetLastError());
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return success;
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}
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error_code create_directory(const Twine &path, bool &existed) {
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SmallString<128> path_storage;
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SmallVector<wchar_t, 128> path_utf16;
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if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
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path_utf16))
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return ec;
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if (!::CreateDirectoryW(path_utf16.begin(), NULL)) {
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error_code ec = windows_error(::GetLastError());
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if (ec == windows_error::already_exists)
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existed = true;
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else
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return ec;
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} else
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existed = false;
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return success;
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}
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error_code create_hard_link(const Twine &to, const Twine &from) {
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// Get arguments.
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SmallString<128> from_storage;
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SmallString<128> to_storage;
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StringRef f = from.toStringRef(from_storage);
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StringRef t = to.toStringRef(to_storage);
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// Convert to utf-16.
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SmallVector<wchar_t, 128> wide_from;
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SmallVector<wchar_t, 128> wide_to;
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if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
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if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
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if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL))
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return windows_error(::GetLastError());
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return success;
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}
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error_code create_symlink(const Twine &to, const Twine &from) {
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// Only do it if the function is available at runtime.
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if (!create_symbolic_link_api)
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return make_error_code(errc::function_not_supported);
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// Get arguments.
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SmallString<128> from_storage;
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SmallString<128> to_storage;
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StringRef f = from.toStringRef(from_storage);
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StringRef t = to.toStringRef(to_storage);
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// Convert to utf-16.
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SmallVector<wchar_t, 128> wide_from;
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SmallVector<wchar_t, 128> wide_to;
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if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
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if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
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if (!create_symbolic_link_api(wide_from.begin(), wide_to.begin(), 0))
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return windows_error(::GetLastError());
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return success;
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}
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error_code remove(const Twine &path, bool &existed) {
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SmallString<128> path_storage;
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SmallVector<wchar_t, 128> path_utf16;
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file_status st;
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if (error_code ec = status(path, st))
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return ec;
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if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
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path_utf16))
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return ec;
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if (st.type() == file_type::directory_file) {
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if (!::RemoveDirectoryW(c_str(path_utf16))) {
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error_code ec = windows_error(::GetLastError());
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if (ec != windows_error::file_not_found)
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return ec;
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existed = false;
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} else
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existed = true;
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} else {
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if (!::DeleteFileW(c_str(path_utf16))) {
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error_code ec = windows_error(::GetLastError());
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if (ec != windows_error::file_not_found)
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return ec;
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existed = false;
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} else
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existed = true;
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}
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return success;
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}
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error_code rename(const Twine &from, const Twine &to) {
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// Get arguments.
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SmallString<128> from_storage;
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SmallString<128> to_storage;
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StringRef f = from.toStringRef(from_storage);
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StringRef t = to.toStringRef(to_storage);
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// Convert to utf-16.
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SmallVector<wchar_t, 128> wide_from;
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SmallVector<wchar_t, 128> wide_to;
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if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
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if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
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if (!::MoveFileExW(wide_from.begin(), wide_to.begin(),
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MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
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return windows_error(::GetLastError());
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return success;
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}
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error_code resize_file(const Twine &path, uint64_t size) {
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SmallString<128> path_storage;
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SmallVector<wchar_t, 128> path_utf16;
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if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
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path_utf16))
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return ec;
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int fd = ::_wopen(path_utf16.begin(), O_BINARY, S_IREAD | S_IWRITE);
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if (fd == -1)
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return error_code(errno, generic_category());
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#ifdef HAVE__CHSIZE_S
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errno_t error = ::_chsize_s(fd, size);
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#else
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errno_t error = ::_chsize(fd, size);
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#endif
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::close(fd);
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return error_code(error, generic_category());
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}
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error_code exists(const Twine &path, bool &result) {
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SmallString<128> path_storage;
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SmallVector<wchar_t, 128> path_utf16;
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if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
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path_utf16))
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return ec;
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DWORD attributes = ::GetFileAttributesW(path_utf16.begin());
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if (attributes == INVALID_FILE_ATTRIBUTES) {
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// See if the file didn't actually exist.
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error_code ec = make_error_code(windows_error(::GetLastError()));
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if (ec != windows_error::file_not_found &&
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ec != windows_error::path_not_found)
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return ec;
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result = false;
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} else
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result = true;
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return success;
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}
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bool equivalent(file_status A, file_status B) {
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assert(status_known(A) && status_known(B));
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return A.FileIndexHigh == B.FileIndexHigh &&
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A.FileIndexLow == B.FileIndexLow &&
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A.FileSizeHigh == B.FileSizeHigh &&
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A.FileSizeLow == B.FileSizeLow &&
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A.LastWriteTimeHigh == B.LastWriteTimeHigh &&
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A.LastWriteTimeLow == B.LastWriteTimeLow &&
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A.VolumeSerialNumber == B.VolumeSerialNumber;
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}
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error_code equivalent(const Twine &A, const Twine &B, bool &result) {
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file_status fsA, fsB;
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if (error_code ec = status(A, fsA)) return ec;
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if (error_code ec = status(B, fsB)) return ec;
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result = equivalent(fsA, fsB);
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return success;
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}
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error_code file_size(const Twine &path, uint64_t &result) {
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SmallString<128> path_storage;
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SmallVector<wchar_t, 128> path_utf16;
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if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
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path_utf16))
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return ec;
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WIN32_FILE_ATTRIBUTE_DATA FileData;
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if (!::GetFileAttributesExW(path_utf16.begin(),
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::GetFileExInfoStandard,
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&FileData))
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return windows_error(::GetLastError());
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result =
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(uint64_t(FileData.nFileSizeHigh) << (sizeof(FileData.nFileSizeLow) * 8))
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+ FileData.nFileSizeLow;
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return success;
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}
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static bool isReservedName(StringRef path) {
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// This list of reserved names comes from MSDN, at:
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// http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx
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static const char *sReservedNames[] = { "nul", "con", "prn", "aux",
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"com1", "com2", "com3", "com4", "com5", "com6",
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"com7", "com8", "com9", "lpt1", "lpt2", "lpt3",
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"lpt4", "lpt5", "lpt6", "lpt7", "lpt8", "lpt9" };
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// First, check to see if this is a device namespace, which always
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// starts with \\.\, since device namespaces are not legal file paths.
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if (path.startswith("\\\\.\\"))
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return true;
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// Then compare against the list of ancient reserved names
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for (size_t i = 0; i < sizeof(sReservedNames) / sizeof(const char *); ++i) {
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if (path.equals_lower(sReservedNames[i]))
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return true;
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}
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// The path isn't what we consider reserved.
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return false;
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}
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error_code status(const Twine &path, file_status &result) {
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SmallString<128> path_storage;
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SmallVector<wchar_t, 128> path_utf16;
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StringRef path8 = path.toStringRef(path_storage);
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if (isReservedName(path8)) {
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result = file_status(file_type::character_file);
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return success;
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}
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if (error_code ec = UTF8ToUTF16(path8, path_utf16))
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return ec;
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DWORD attr = ::GetFileAttributesW(path_utf16.begin());
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if (attr == INVALID_FILE_ATTRIBUTES)
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goto handle_status_error;
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// Handle reparse points.
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if (attr & FILE_ATTRIBUTE_REPARSE_POINT) {
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ScopedFileHandle h(
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::CreateFileW(path_utf16.begin(),
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0, // Attributes only.
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FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL,
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OPEN_EXISTING,
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FILE_FLAG_BACKUP_SEMANTICS,
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0));
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if (!h)
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goto handle_status_error;
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}
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if (attr & FILE_ATTRIBUTE_DIRECTORY)
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result = file_status(file_type::directory_file);
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else {
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result = file_status(file_type::regular_file);
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ScopedFileHandle h(
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::CreateFileW(path_utf16.begin(),
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0, // Attributes only.
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FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL,
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OPEN_EXISTING,
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FILE_FLAG_BACKUP_SEMANTICS,
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0));
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if (!h)
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goto handle_status_error;
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BY_HANDLE_FILE_INFORMATION Info;
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if (!::GetFileInformationByHandle(h, &Info))
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goto handle_status_error;
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result.FileIndexHigh = Info.nFileIndexHigh;
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result.FileIndexLow = Info.nFileIndexLow;
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result.FileSizeHigh = Info.nFileSizeHigh;
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result.FileSizeLow = Info.nFileSizeLow;
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result.LastWriteTimeHigh = Info.ftLastWriteTime.dwHighDateTime;
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result.LastWriteTimeLow = Info.ftLastWriteTime.dwLowDateTime;
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result.VolumeSerialNumber = Info.dwVolumeSerialNumber;
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}
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return success;
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handle_status_error:
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error_code ec = windows_error(::GetLastError());
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if (ec == windows_error::file_not_found ||
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ec == windows_error::path_not_found)
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result = file_status(file_type::file_not_found);
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else if (ec == windows_error::sharing_violation)
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result = file_status(file_type::type_unknown);
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else {
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result = file_status(file_type::status_error);
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return ec;
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}
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return success;
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}
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error_code unique_file(const Twine &model, int &result_fd,
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SmallVectorImpl<char> &result_path,
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bool makeAbsolute) {
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// Use result_path as temp storage.
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result_path.set_size(0);
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StringRef m = model.toStringRef(result_path);
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SmallVector<wchar_t, 128> model_utf16;
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if (error_code ec = UTF8ToUTF16(m, model_utf16)) return ec;
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|
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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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bool absolute = path::is_absolute(m);
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|
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if (!absolute) {
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SmallVector<wchar_t, 64> temp_dir;
|
|
if (error_code ec = TempDir(temp_dir)) return ec;
|
|
// Handle c: by removing it.
|
|
if (model_utf16.size() > 2 && model_utf16[1] == L':') {
|
|
model_utf16.erase(model_utf16.begin(), model_utf16.begin() + 2);
|
|
}
|
|
model_utf16.insert(model_utf16.begin(), temp_dir.begin(), temp_dir.end());
|
|
}
|
|
}
|
|
|
|
// Replace '%' with random chars. From here on, DO NOT modify model. It may be
|
|
// needed if the randomly chosen path already exists.
|
|
SmallVector<wchar_t, 128> random_path_utf16;
|
|
|
|
// Get a Crypto Provider for CryptGenRandom.
|
|
HCRYPTPROV HCPC;
|
|
if (!::CryptAcquireContextW(&HCPC,
|
|
NULL,
|
|
NULL,
|
|
PROV_RSA_FULL,
|
|
CRYPT_VERIFYCONTEXT))
|
|
return windows_error(::GetLastError());
|
|
ScopedCryptContext CryptoProvider(HCPC);
|
|
|
|
retry_random_path:
|
|
random_path_utf16.set_size(0);
|
|
for (SmallVectorImpl<wchar_t>::const_iterator i = model_utf16.begin(),
|
|
e = model_utf16.end();
|
|
i != e; ++i) {
|
|
if (*i == L'%') {
|
|
BYTE val = 0;
|
|
if (!::CryptGenRandom(CryptoProvider, 1, &val))
|
|
return windows_error(::GetLastError());
|
|
random_path_utf16.push_back("0123456789abcdef"[val & 15]);
|
|
}
|
|
else
|
|
random_path_utf16.push_back(*i);
|
|
}
|
|
// Make random_path_utf16 null terminated.
|
|
random_path_utf16.push_back(0);
|
|
random_path_utf16.pop_back();
|
|
|
|
// Try to create + open the path.
|
|
retry_create_file:
|
|
HANDLE TempFileHandle = ::CreateFileW(random_path_utf16.begin(),
|
|
GENERIC_READ | GENERIC_WRITE,
|
|
FILE_SHARE_READ,
|
|
NULL,
|
|
// Return ERROR_FILE_EXISTS if the file
|
|
// already exists.
|
|
CREATE_NEW,
|
|
FILE_ATTRIBUTE_TEMPORARY,
|
|
NULL);
|
|
if (TempFileHandle == INVALID_HANDLE_VALUE) {
|
|
// If the file existed, try again, otherwise, error.
|
|
error_code ec = windows_error(::GetLastError());
|
|
if (ec == windows_error::file_exists)
|
|
goto retry_random_path;
|
|
// Check for non-existing parent directories.
|
|
if (ec == windows_error::path_not_found) {
|
|
// Create the directories using result_path as temp storage.
|
|
if (error_code ec = UTF16ToUTF8(random_path_utf16.begin(),
|
|
random_path_utf16.size(), result_path))
|
|
return ec;
|
|
StringRef p(result_path.begin(), result_path.size());
|
|
SmallString<64> dir_to_create;
|
|
for (path::const_iterator i = path::begin(p),
|
|
e = --path::end(p); i != e; ++i) {
|
|
path::append(dir_to_create, *i);
|
|
bool Exists;
|
|
if (error_code ec = exists(Twine(dir_to_create), Exists)) return ec;
|
|
if (!Exists) {
|
|
// If c: doesn't exist, bail.
|
|
if (i->endswith(":"))
|
|
return ec;
|
|
|
|
SmallVector<wchar_t, 64> dir_to_create_utf16;
|
|
if (error_code ec = UTF8ToUTF16(dir_to_create, dir_to_create_utf16))
|
|
return ec;
|
|
|
|
// Create the directory.
|
|
if (!::CreateDirectoryW(dir_to_create_utf16.begin(), NULL))
|
|
return windows_error(::GetLastError());
|
|
}
|
|
}
|
|
goto retry_create_file;
|
|
}
|
|
return ec;
|
|
}
|
|
|
|
// Set result_path to the utf-8 representation of the path.
|
|
if (error_code ec = UTF16ToUTF8(random_path_utf16.begin(),
|
|
random_path_utf16.size(), result_path)) {
|
|
::CloseHandle(TempFileHandle);
|
|
::DeleteFileW(random_path_utf16.begin());
|
|
return ec;
|
|
}
|
|
|
|
// Convert the Windows API file handle into a C-runtime handle.
|
|
int fd = ::_open_osfhandle(intptr_t(TempFileHandle), 0);
|
|
if (fd == -1) {
|
|
::CloseHandle(TempFileHandle);
|
|
::DeleteFileW(random_path_utf16.begin());
|
|
// MSDN doesn't say anything about _open_osfhandle setting errno or
|
|
// GetLastError(), so just return invalid_handle.
|
|
return windows_error::invalid_handle;
|
|
}
|
|
|
|
result_fd = fd;
|
|
return success;
|
|
}
|
|
|
|
error_code get_magic(const Twine &path, uint32_t len,
|
|
SmallVectorImpl<char> &result) {
|
|
SmallString<128> path_storage;
|
|
SmallVector<wchar_t, 128> path_utf16;
|
|
result.set_size(0);
|
|
|
|
// Convert path to UTF-16.
|
|
if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
|
|
path_utf16))
|
|
return ec;
|
|
|
|
// Open file.
|
|
HANDLE file = ::CreateFileW(c_str(path_utf16),
|
|
GENERIC_READ,
|
|
FILE_SHARE_READ,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
FILE_ATTRIBUTE_READONLY,
|
|
NULL);
|
|
if (file == INVALID_HANDLE_VALUE)
|
|
return windows_error(::GetLastError());
|
|
|
|
// Allocate buffer.
|
|
result.reserve(len);
|
|
|
|
// Get magic!
|
|
DWORD bytes_read = 0;
|
|
BOOL read_success = ::ReadFile(file, result.data(), len, &bytes_read, NULL);
|
|
error_code ec = windows_error(::GetLastError());
|
|
::CloseHandle(file);
|
|
if (!read_success || (bytes_read != len)) {
|
|
// Set result size to the number of bytes read if it's valid.
|
|
if (bytes_read <= len)
|
|
result.set_size(bytes_read);
|
|
// ERROR_HANDLE_EOF is mapped to errc::value_too_large.
|
|
return ec;
|
|
}
|
|
|
|
result.set_size(len);
|
|
return success;
|
|
}
|
|
|
|
error_code detail::directory_iterator_construct(detail::DirIterState &it,
|
|
StringRef path){
|
|
SmallVector<wchar_t, 128> path_utf16;
|
|
|
|
if (error_code ec = UTF8ToUTF16(path,
|
|
path_utf16))
|
|
return ec;
|
|
|
|
// Convert path to the format that Windows is happy with.
|
|
if (path_utf16.size() > 0 &&
|
|
!is_separator(path_utf16[path.size() - 1]) &&
|
|
path_utf16[path.size() - 1] != L':') {
|
|
path_utf16.push_back(L'\\');
|
|
path_utf16.push_back(L'*');
|
|
} else {
|
|
path_utf16.push_back(L'*');
|
|
}
|
|
|
|
// Get the first directory entry.
|
|
WIN32_FIND_DATAW FirstFind;
|
|
ScopedFindHandle FindHandle(::FindFirstFileW(c_str(path_utf16), &FirstFind));
|
|
if (!FindHandle)
|
|
return windows_error(::GetLastError());
|
|
|
|
size_t FilenameLen = ::wcslen(FirstFind.cFileName);
|
|
while ((FilenameLen == 1 && FirstFind.cFileName[0] == L'.') ||
|
|
(FilenameLen == 2 && FirstFind.cFileName[0] == L'.' &&
|
|
FirstFind.cFileName[1] == L'.'))
|
|
if (!::FindNextFileW(FindHandle, &FirstFind)) {
|
|
error_code ec = windows_error(::GetLastError());
|
|
// Check for end.
|
|
if (ec == windows_error::no_more_files)
|
|
return detail::directory_iterator_destruct(it);
|
|
return ec;
|
|
} else
|
|
FilenameLen = ::wcslen(FirstFind.cFileName);
|
|
|
|
// Construct the current directory entry.
|
|
SmallString<128> directory_entry_name_utf8;
|
|
if (error_code ec = UTF16ToUTF8(FirstFind.cFileName,
|
|
::wcslen(FirstFind.cFileName),
|
|
directory_entry_name_utf8))
|
|
return ec;
|
|
|
|
it.IterationHandle = intptr_t(FindHandle.take());
|
|
SmallString<128> directory_entry_path(path);
|
|
path::append(directory_entry_path, directory_entry_name_utf8.str());
|
|
it.CurrentEntry = directory_entry(directory_entry_path.str());
|
|
|
|
return success;
|
|
}
|
|
|
|
error_code detail::directory_iterator_destruct(detail::DirIterState &it) {
|
|
if (it.IterationHandle != 0)
|
|
// Closes the handle if it's valid.
|
|
ScopedFindHandle close(HANDLE(it.IterationHandle));
|
|
it.IterationHandle = 0;
|
|
it.CurrentEntry = directory_entry();
|
|
return success;
|
|
}
|
|
|
|
error_code detail::directory_iterator_increment(detail::DirIterState &it) {
|
|
WIN32_FIND_DATAW FindData;
|
|
if (!::FindNextFileW(HANDLE(it.IterationHandle), &FindData)) {
|
|
error_code ec = windows_error(::GetLastError());
|
|
// Check for end.
|
|
if (ec == windows_error::no_more_files)
|
|
return detail::directory_iterator_destruct(it);
|
|
return ec;
|
|
}
|
|
|
|
size_t FilenameLen = ::wcslen(FindData.cFileName);
|
|
if ((FilenameLen == 1 && FindData.cFileName[0] == L'.') ||
|
|
(FilenameLen == 2 && FindData.cFileName[0] == L'.' &&
|
|
FindData.cFileName[1] == L'.'))
|
|
return directory_iterator_increment(it);
|
|
|
|
SmallString<128> directory_entry_path_utf8;
|
|
if (error_code ec = UTF16ToUTF8(FindData.cFileName,
|
|
::wcslen(FindData.cFileName),
|
|
directory_entry_path_utf8))
|
|
return ec;
|
|
|
|
it.CurrentEntry.replace_filename(Twine(directory_entry_path_utf8));
|
|
return success;
|
|
}
|
|
|
|
} // end namespace fs
|
|
} // end namespace sys
|
|
} // end namespace llvm
|