mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +00:00
118f194966
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161978 91177308-0d34-0410-b5e6-96231b3b80d8
1008 lines
32 KiB
C++
1008 lines
32 KiB
C++
//===- llvm/Support/Windows/PathV2.inc - Windows Path Impl ------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the Windows specific implementation of the PathV2 API.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//=== WARNING: Implementation here must contain only generic Windows code that
|
|
//=== is guaranteed to work on *all* Windows variants.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "Windows.h"
|
|
#include <fcntl.h>
|
|
#include <io.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
|
|
#undef max
|
|
|
|
// MinGW doesn't define this.
|
|
#ifndef _ERRNO_T_DEFINED
|
|
#define _ERRNO_T_DEFINED
|
|
typedef int errno_t;
|
|
#endif
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
typedef BOOLEAN (WINAPI *PtrCreateSymbolicLinkW)(
|
|
/*__in*/ LPCWSTR lpSymlinkFileName,
|
|
/*__in*/ LPCWSTR lpTargetFileName,
|
|
/*__in*/ DWORD dwFlags);
|
|
|
|
PtrCreateSymbolicLinkW create_symbolic_link_api = PtrCreateSymbolicLinkW(
|
|
::GetProcAddress(::GetModuleHandleA("kernel32.dll"),
|
|
"CreateSymbolicLinkW"));
|
|
|
|
error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16) {
|
|
int len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
|
|
utf8.begin(), utf8.size(),
|
|
utf16.begin(), 0);
|
|
|
|
if (len == 0)
|
|
return windows_error(::GetLastError());
|
|
|
|
utf16.reserve(len + 1);
|
|
utf16.set_size(len);
|
|
|
|
len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
|
|
utf8.begin(), utf8.size(),
|
|
utf16.begin(), utf16.size());
|
|
|
|
if (len == 0)
|
|
return windows_error(::GetLastError());
|
|
|
|
// Make utf16 null terminated.
|
|
utf16.push_back(0);
|
|
utf16.pop_back();
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
|
|
SmallVectorImpl<char> &utf8) {
|
|
// Get length.
|
|
int len = ::WideCharToMultiByte(CP_UTF8, 0,
|
|
utf16, utf16_len,
|
|
utf8.begin(), 0,
|
|
NULL, NULL);
|
|
|
|
if (len == 0)
|
|
return windows_error(::GetLastError());
|
|
|
|
utf8.reserve(len);
|
|
utf8.set_size(len);
|
|
|
|
// Now do the actual conversion.
|
|
len = ::WideCharToMultiByte(CP_UTF8, 0,
|
|
utf16, utf16_len,
|
|
utf8.data(), utf8.size(),
|
|
NULL, NULL);
|
|
|
|
if (len == 0)
|
|
return windows_error(::GetLastError());
|
|
|
|
// Make utf8 null terminated.
|
|
utf8.push_back(0);
|
|
utf8.pop_back();
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code TempDir(SmallVectorImpl<wchar_t> &result) {
|
|
retry_temp_dir:
|
|
DWORD len = ::GetTempPathW(result.capacity(), result.begin());
|
|
|
|
if (len == 0)
|
|
return windows_error(::GetLastError());
|
|
|
|
if (len > result.capacity()) {
|
|
result.reserve(len);
|
|
goto retry_temp_dir;
|
|
}
|
|
|
|
result.set_size(len);
|
|
return error_code::success();
|
|
}
|
|
|
|
bool is_separator(const wchar_t value) {
|
|
switch (value) {
|
|
case L'\\':
|
|
case L'/':
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace llvm {
|
|
namespace sys {
|
|
namespace fs {
|
|
|
|
error_code current_path(SmallVectorImpl<char> &result) {
|
|
SmallVector<wchar_t, 128> cur_path;
|
|
cur_path.reserve(128);
|
|
retry_cur_dir:
|
|
DWORD len = ::GetCurrentDirectoryW(cur_path.capacity(), cur_path.data());
|
|
|
|
// A zero return value indicates a failure other than insufficient space.
|
|
if (len == 0)
|
|
return windows_error(::GetLastError());
|
|
|
|
// If there's insufficient space, the len returned is larger than the len
|
|
// given.
|
|
if (len > cur_path.capacity()) {
|
|
cur_path.reserve(len);
|
|
goto retry_cur_dir;
|
|
}
|
|
|
|
cur_path.set_size(len);
|
|
// cur_path now holds the current directory in utf-16. Convert to utf-8.
|
|
|
|
// Find out how much space we need. Sadly, this function doesn't return the
|
|
// size needed unless you tell it the result size is 0, which means you
|
|
// _always_ have to call it twice.
|
|
len = ::WideCharToMultiByte(CP_UTF8, 0,
|
|
cur_path.data(), cur_path.size(),
|
|
result.data(), 0,
|
|
NULL, NULL);
|
|
|
|
if (len == 0)
|
|
return make_error_code(windows_error(::GetLastError()));
|
|
|
|
result.reserve(len);
|
|
result.set_size(len);
|
|
// Now do the actual conversion.
|
|
len = ::WideCharToMultiByte(CP_UTF8, 0,
|
|
cur_path.data(), cur_path.size(),
|
|
result.data(), result.size(),
|
|
NULL, NULL);
|
|
if (len == 0)
|
|
return windows_error(::GetLastError());
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code copy_file(const Twine &from, const Twine &to, copy_option copt) {
|
|
// Get arguments.
|
|
SmallString<128> from_storage;
|
|
SmallString<128> to_storage;
|
|
StringRef f = from.toStringRef(from_storage);
|
|
StringRef t = to.toStringRef(to_storage);
|
|
|
|
// Convert to utf-16.
|
|
SmallVector<wchar_t, 128> wide_from;
|
|
SmallVector<wchar_t, 128> wide_to;
|
|
if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
|
|
if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
|
|
|
|
// Copy the file.
|
|
BOOL res = ::CopyFileW(wide_from.begin(), wide_to.begin(),
|
|
copt != copy_option::overwrite_if_exists);
|
|
|
|
if (res == 0)
|
|
return windows_error(::GetLastError());
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code create_directory(const Twine &path, bool &existed) {
|
|
SmallString<128> path_storage;
|
|
SmallVector<wchar_t, 128> path_utf16;
|
|
|
|
if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
|
|
path_utf16))
|
|
return ec;
|
|
|
|
if (!::CreateDirectoryW(path_utf16.begin(), NULL)) {
|
|
error_code ec = windows_error(::GetLastError());
|
|
if (ec == windows_error::already_exists)
|
|
existed = true;
|
|
else
|
|
return ec;
|
|
} else
|
|
existed = false;
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code create_hard_link(const Twine &to, const Twine &from) {
|
|
// Get arguments.
|
|
SmallString<128> from_storage;
|
|
SmallString<128> to_storage;
|
|
StringRef f = from.toStringRef(from_storage);
|
|
StringRef t = to.toStringRef(to_storage);
|
|
|
|
// Convert to utf-16.
|
|
SmallVector<wchar_t, 128> wide_from;
|
|
SmallVector<wchar_t, 128> wide_to;
|
|
if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
|
|
if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
|
|
|
|
if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL))
|
|
return windows_error(::GetLastError());
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code create_symlink(const Twine &to, const Twine &from) {
|
|
// Only do it if the function is available at runtime.
|
|
if (!create_symbolic_link_api)
|
|
return make_error_code(errc::function_not_supported);
|
|
|
|
// Get arguments.
|
|
SmallString<128> from_storage;
|
|
SmallString<128> to_storage;
|
|
StringRef f = from.toStringRef(from_storage);
|
|
StringRef t = to.toStringRef(to_storage);
|
|
|
|
// Convert to utf-16.
|
|
SmallVector<wchar_t, 128> wide_from;
|
|
SmallVector<wchar_t, 128> wide_to;
|
|
if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
|
|
if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
|
|
|
|
if (!create_symbolic_link_api(wide_from.begin(), wide_to.begin(), 0))
|
|
return windows_error(::GetLastError());
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code remove(const Twine &path, bool &existed) {
|
|
SmallString<128> path_storage;
|
|
SmallVector<wchar_t, 128> path_utf16;
|
|
|
|
file_status st;
|
|
if (error_code ec = status(path, st))
|
|
return ec;
|
|
|
|
if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
|
|
path_utf16))
|
|
return ec;
|
|
|
|
if (st.type() == file_type::directory_file) {
|
|
if (!::RemoveDirectoryW(c_str(path_utf16))) {
|
|
error_code ec = windows_error(::GetLastError());
|
|
if (ec != windows_error::file_not_found)
|
|
return ec;
|
|
existed = false;
|
|
} else
|
|
existed = true;
|
|
} else {
|
|
if (!::DeleteFileW(c_str(path_utf16))) {
|
|
error_code ec = windows_error(::GetLastError());
|
|
if (ec != windows_error::file_not_found)
|
|
return ec;
|
|
existed = false;
|
|
} else
|
|
existed = true;
|
|
}
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code rename(const Twine &from, const Twine &to) {
|
|
// Get arguments.
|
|
SmallString<128> from_storage;
|
|
SmallString<128> to_storage;
|
|
StringRef f = from.toStringRef(from_storage);
|
|
StringRef t = to.toStringRef(to_storage);
|
|
|
|
// Convert to utf-16.
|
|
SmallVector<wchar_t, 128> wide_from;
|
|
SmallVector<wchar_t, 128> wide_to;
|
|
if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
|
|
if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
|
|
|
|
error_code ec = error_code::success();
|
|
for (int i = 0; i < 2000; i++) {
|
|
if (::MoveFileExW(wide_from.begin(), wide_to.begin(),
|
|
MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
|
|
return error_code::success();
|
|
ec = windows_error(::GetLastError());
|
|
if (ec != windows_error::access_denied)
|
|
break;
|
|
// Retry MoveFile() at ACCESS_DENIED.
|
|
// System scanners (eg. indexer) might open the source file when
|
|
// It is written and closed.
|
|
::Sleep(1);
|
|
}
|
|
|
|
return ec;
|
|
}
|
|
|
|
error_code resize_file(const Twine &path, uint64_t size) {
|
|
SmallString<128> path_storage;
|
|
SmallVector<wchar_t, 128> path_utf16;
|
|
|
|
if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
|
|
path_utf16))
|
|
return ec;
|
|
|
|
int fd = ::_wopen(path_utf16.begin(), O_BINARY, S_IREAD | S_IWRITE);
|
|
if (fd == -1)
|
|
return error_code(errno, generic_category());
|
|
#ifdef HAVE__CHSIZE_S
|
|
errno_t error = ::_chsize_s(fd, size);
|
|
#else
|
|
errno_t error = ::_chsize(fd, size);
|
|
#endif
|
|
::close(fd);
|
|
return error_code(error, generic_category());
|
|
}
|
|
|
|
error_code exists(const Twine &path, bool &result) {
|
|
SmallString<128> path_storage;
|
|
SmallVector<wchar_t, 128> path_utf16;
|
|
|
|
if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
|
|
path_utf16))
|
|
return ec;
|
|
|
|
DWORD attributes = ::GetFileAttributesW(path_utf16.begin());
|
|
|
|
if (attributes == INVALID_FILE_ATTRIBUTES) {
|
|
// See if the file didn't actually exist.
|
|
error_code ec = make_error_code(windows_error(::GetLastError()));
|
|
if (ec != windows_error::file_not_found &&
|
|
ec != windows_error::path_not_found)
|
|
return ec;
|
|
result = false;
|
|
} else
|
|
result = true;
|
|
return error_code::success();
|
|
}
|
|
|
|
bool equivalent(file_status A, file_status B) {
|
|
assert(status_known(A) && status_known(B));
|
|
return A.FileIndexHigh == B.FileIndexHigh &&
|
|
A.FileIndexLow == B.FileIndexLow &&
|
|
A.FileSizeHigh == B.FileSizeHigh &&
|
|
A.FileSizeLow == B.FileSizeLow &&
|
|
A.LastWriteTimeHigh == B.LastWriteTimeHigh &&
|
|
A.LastWriteTimeLow == B.LastWriteTimeLow &&
|
|
A.VolumeSerialNumber == B.VolumeSerialNumber;
|
|
}
|
|
|
|
error_code equivalent(const Twine &A, const Twine &B, bool &result) {
|
|
file_status fsA, fsB;
|
|
if (error_code ec = status(A, fsA)) return ec;
|
|
if (error_code ec = status(B, fsB)) return ec;
|
|
result = equivalent(fsA, fsB);
|
|
return error_code::success();
|
|
}
|
|
|
|
error_code file_size(const Twine &path, uint64_t &result) {
|
|
SmallString<128> path_storage;
|
|
SmallVector<wchar_t, 128> path_utf16;
|
|
|
|
if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
|
|
path_utf16))
|
|
return ec;
|
|
|
|
WIN32_FILE_ATTRIBUTE_DATA FileData;
|
|
if (!::GetFileAttributesExW(path_utf16.begin(),
|
|
::GetFileExInfoStandard,
|
|
&FileData))
|
|
return windows_error(::GetLastError());
|
|
|
|
result =
|
|
(uint64_t(FileData.nFileSizeHigh) << (sizeof(FileData.nFileSizeLow) * 8))
|
|
+ FileData.nFileSizeLow;
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
static bool isReservedName(StringRef path) {
|
|
// This list of reserved names comes from MSDN, at:
|
|
// http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx
|
|
static const char *sReservedNames[] = { "nul", "con", "prn", "aux",
|
|
"com1", "com2", "com3", "com4", "com5", "com6",
|
|
"com7", "com8", "com9", "lpt1", "lpt2", "lpt3",
|
|
"lpt4", "lpt5", "lpt6", "lpt7", "lpt8", "lpt9" };
|
|
|
|
// First, check to see if this is a device namespace, which always
|
|
// starts with \\.\, since device namespaces are not legal file paths.
|
|
if (path.startswith("\\\\.\\"))
|
|
return true;
|
|
|
|
// Then compare against the list of ancient reserved names
|
|
for (size_t i = 0; i < sizeof(sReservedNames) / sizeof(const char *); ++i) {
|
|
if (path.equals_lower(sReservedNames[i]))
|
|
return true;
|
|
}
|
|
|
|
// The path isn't what we consider reserved.
|
|
return false;
|
|
}
|
|
|
|
error_code status(const Twine &path, file_status &result) {
|
|
SmallString<128> path_storage;
|
|
SmallVector<wchar_t, 128> path_utf16;
|
|
|
|
StringRef path8 = path.toStringRef(path_storage);
|
|
if (isReservedName(path8)) {
|
|
result = file_status(file_type::character_file);
|
|
return error_code::success();
|
|
}
|
|
|
|
if (error_code ec = UTF8ToUTF16(path8, path_utf16))
|
|
return ec;
|
|
|
|
DWORD attr = ::GetFileAttributesW(path_utf16.begin());
|
|
if (attr == INVALID_FILE_ATTRIBUTES)
|
|
goto handle_status_error;
|
|
|
|
// Handle reparse points.
|
|
if (attr & FILE_ATTRIBUTE_REPARSE_POINT) {
|
|
ScopedFileHandle h(
|
|
::CreateFileW(path_utf16.begin(),
|
|
0, // Attributes only.
|
|
FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
FILE_FLAG_BACKUP_SEMANTICS,
|
|
0));
|
|
if (!h)
|
|
goto handle_status_error;
|
|
}
|
|
|
|
if (attr & FILE_ATTRIBUTE_DIRECTORY)
|
|
result = file_status(file_type::directory_file);
|
|
else {
|
|
result = file_status(file_type::regular_file);
|
|
ScopedFileHandle h(
|
|
::CreateFileW(path_utf16.begin(),
|
|
0, // Attributes only.
|
|
FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
FILE_FLAG_BACKUP_SEMANTICS,
|
|
0));
|
|
if (!h)
|
|
goto handle_status_error;
|
|
BY_HANDLE_FILE_INFORMATION Info;
|
|
if (!::GetFileInformationByHandle(h, &Info))
|
|
goto handle_status_error;
|
|
result.FileIndexHigh = Info.nFileIndexHigh;
|
|
result.FileIndexLow = Info.nFileIndexLow;
|
|
result.FileSizeHigh = Info.nFileSizeHigh;
|
|
result.FileSizeLow = Info.nFileSizeLow;
|
|
result.LastWriteTimeHigh = Info.ftLastWriteTime.dwHighDateTime;
|
|
result.LastWriteTimeLow = Info.ftLastWriteTime.dwLowDateTime;
|
|
result.VolumeSerialNumber = Info.dwVolumeSerialNumber;
|
|
}
|
|
|
|
return error_code::success();
|
|
|
|
handle_status_error:
|
|
error_code ec = windows_error(::GetLastError());
|
|
if (ec == windows_error::file_not_found ||
|
|
ec == windows_error::path_not_found)
|
|
result = file_status(file_type::file_not_found);
|
|
else if (ec == windows_error::sharing_violation)
|
|
result = file_status(file_type::type_unknown);
|
|
else {
|
|
result = file_status(file_type::status_error);
|
|
return ec;
|
|
}
|
|
|
|
return error_code::success();
|
|
}
|
|
|
|
|
|
// Modifies permissions on a file.
|
|
error_code permissions(const Twine &path, perms prms) {
|
|
#if 0 // verify code below before enabling:
|
|
// If the permissions bits are not trying to modify
|
|
// "write" permissions, there is nothing to do.
|
|
if (!(prms & (owner_write|group_write|others_write)))
|
|
return error_code::success();
|
|
|
|
SmallString<128> path_storage;
|
|
SmallVector<wchar_t, 128> path_utf16;
|
|
|
|
if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
|
|
path_utf16))
|
|
return ec;
|
|
|
|
DWORD attributes = ::GetFileAttributesW(path_utf16.begin());
|
|
|
|
if (prms & add_perms) {
|
|
attributes &= ~FILE_ATTRIBUTE_READONLY;
|
|
}
|
|
else if (prms & remove_perms) {
|
|
attributes |= FILE_ATTRIBUTE_READONLY;
|
|
}
|
|
else {
|
|
assert(0 && "neither add_perms or remove_perms is set");
|
|
}
|
|
|
|
if ( ! ::SetFileAttributesW(path_utf16.begin(), attributes))
|
|
return windows_error(::GetLastError());
|
|
#endif
|
|
return error_code::success();
|
|
}
|
|
|
|
|
|
// FIXME: mode should be used here and default to user r/w only,
|
|
// it currently comes in as a UNIX mode.
|
|
error_code unique_file(const Twine &model, int &result_fd,
|
|
SmallVectorImpl<char> &result_path,
|
|
bool makeAbsolute, unsigned mode) {
|
|
// Use result_path as temp storage.
|
|
result_path.set_size(0);
|
|
StringRef m = model.toStringRef(result_path);
|
|
|
|
SmallVector<wchar_t, 128> model_utf16;
|
|
if (error_code ec = UTF8ToUTF16(m, model_utf16)) return ec;
|
|
|
|
if (makeAbsolute) {
|
|
// Make model absolute by prepending a temp directory if it's not already.
|
|
bool absolute = path::is_absolute(m);
|
|
|
|
if (!absolute) {
|
|
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 error_code::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 error_code::success();
|
|
}
|
|
|
|
error_code mapped_file_region::init(int FD, uint64_t Offset) {
|
|
FileDescriptor = FD;
|
|
// Make sure that the requested size fits within SIZE_T.
|
|
if (Size > std::numeric_limits<SIZE_T>::max()) {
|
|
if (FileDescriptor)
|
|
_close(FileDescriptor);
|
|
else
|
|
::CloseHandle(FileHandle);
|
|
return make_error_code(errc::invalid_argument);
|
|
}
|
|
|
|
DWORD flprotect;
|
|
switch (Mode) {
|
|
case readonly: flprotect = PAGE_READONLY; break;
|
|
case readwrite: flprotect = PAGE_READWRITE; break;
|
|
case priv: flprotect = PAGE_WRITECOPY; break;
|
|
default: llvm_unreachable("invalid mapping mode");
|
|
}
|
|
|
|
FileMappingHandle = ::CreateFileMapping(FileHandle,
|
|
0,
|
|
flprotect,
|
|
Size >> 32,
|
|
Size & 0xffffffff,
|
|
0);
|
|
if (FileMappingHandle == NULL) {
|
|
error_code ec = windows_error(GetLastError());
|
|
if (FileDescriptor)
|
|
_close(FileDescriptor);
|
|
else
|
|
::CloseHandle(FileHandle);
|
|
return ec;
|
|
}
|
|
|
|
DWORD dwDesiredAccess;
|
|
switch (Mode) {
|
|
case readonly: dwDesiredAccess = FILE_MAP_READ; break;
|
|
case readwrite: dwDesiredAccess = FILE_MAP_WRITE; break;
|
|
case priv: dwDesiredAccess = FILE_MAP_COPY; break;
|
|
default: llvm_unreachable("invalid mapping mode");
|
|
}
|
|
Mapping = ::MapViewOfFile(FileMappingHandle,
|
|
dwDesiredAccess,
|
|
Offset >> 32,
|
|
Offset & 0xffffffff,
|
|
Size);
|
|
if (Mapping == NULL) {
|
|
error_code ec = windows_error(GetLastError());
|
|
::CloseHandle(FileMappingHandle);
|
|
if (FileDescriptor)
|
|
_close(FileDescriptor);
|
|
else
|
|
::CloseHandle(FileHandle);
|
|
return ec;
|
|
}
|
|
|
|
if (Size == 0) {
|
|
MEMORY_BASIC_INFORMATION mbi;
|
|
SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi));
|
|
if (Result == 0) {
|
|
error_code ec = windows_error(GetLastError());
|
|
::UnmapViewOfFile(Mapping);
|
|
::CloseHandle(FileMappingHandle);
|
|
if (FileDescriptor)
|
|
_close(FileDescriptor);
|
|
else
|
|
::CloseHandle(FileHandle);
|
|
return ec;
|
|
}
|
|
Size = mbi.RegionSize;
|
|
}
|
|
return error_code::success();
|
|
}
|
|
|
|
mapped_file_region::mapped_file_region(const Twine &path,
|
|
mapmode mode,
|
|
uint64_t length,
|
|
uint64_t offset,
|
|
error_code &ec)
|
|
: Mode(mode)
|
|
, Size(length)
|
|
, Mapping()
|
|
, FileDescriptor()
|
|
, FileHandle(INVALID_HANDLE_VALUE)
|
|
, FileMappingHandle() {
|
|
SmallString<128> path_storage;
|
|
SmallVector<wchar_t, 128> path_utf16;
|
|
|
|
// Convert path to UTF-16.
|
|
if (ec = UTF8ToUTF16(path.toStringRef(path_storage), path_utf16))
|
|
return;
|
|
|
|
// Get file handle for creating a file mapping.
|
|
FileHandle = ::CreateFileW(c_str(path_utf16),
|
|
Mode == readonly ? GENERIC_READ
|
|
: GENERIC_READ | GENERIC_WRITE,
|
|
Mode == readonly ? FILE_SHARE_READ
|
|
: 0,
|
|
0,
|
|
Mode == readonly ? OPEN_EXISTING
|
|
: OPEN_ALWAYS,
|
|
Mode == readonly ? FILE_ATTRIBUTE_READONLY
|
|
: FILE_ATTRIBUTE_NORMAL,
|
|
0);
|
|
if (FileHandle == INVALID_HANDLE_VALUE) {
|
|
ec = windows_error(::GetLastError());
|
|
return;
|
|
}
|
|
|
|
FileDescriptor = 0;
|
|
ec = init(FileDescriptor, offset);
|
|
if (ec) {
|
|
Mapping = FileMappingHandle = 0;
|
|
FileHandle = INVALID_HANDLE_VALUE;
|
|
FileDescriptor = 0;
|
|
}
|
|
}
|
|
|
|
mapped_file_region::mapped_file_region(int fd,
|
|
mapmode mode,
|
|
uint64_t length,
|
|
uint64_t offset,
|
|
error_code &ec)
|
|
: Mode(mode)
|
|
, Size(length)
|
|
, Mapping()
|
|
, FileDescriptor(fd)
|
|
, FileHandle(INVALID_HANDLE_VALUE)
|
|
, FileMappingHandle() {
|
|
FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(fd));
|
|
if (FileHandle == INVALID_HANDLE_VALUE) {
|
|
_close(FileDescriptor);
|
|
FileDescriptor = 0;
|
|
ec = make_error_code(errc::bad_file_descriptor);
|
|
return;
|
|
}
|
|
|
|
ec = init(FileDescriptor, offset);
|
|
if (ec) {
|
|
Mapping = FileMappingHandle = 0;
|
|
FileHandle = INVALID_HANDLE_VALUE;
|
|
FileDescriptor = 0;
|
|
}
|
|
}
|
|
|
|
mapped_file_region::~mapped_file_region() {
|
|
if (Mapping)
|
|
::UnmapViewOfFile(Mapping);
|
|
if (FileMappingHandle)
|
|
::CloseHandle(FileMappingHandle);
|
|
if (FileDescriptor)
|
|
_close(FileDescriptor);
|
|
else if (FileHandle != INVALID_HANDLE_VALUE)
|
|
::CloseHandle(FileHandle);
|
|
}
|
|
|
|
#if LLVM_USE_RVALUE_REFERENCES
|
|
mapped_file_region::mapped_file_region(mapped_file_region &&other)
|
|
: Mode(other.Mode)
|
|
, Size(other.Size)
|
|
, Mapping(other.Mapping)
|
|
, FileDescriptor(other.FileDescriptor)
|
|
, FileHandle(other.FileHandle)
|
|
, FileMappingHandle(other.FileMappingHandle) {
|
|
other.Mapping = other.FileMappingHandle = 0;
|
|
other.FileHandle = INVALID_HANDLE_VALUE;
|
|
other.FileDescriptor = 0;
|
|
}
|
|
#endif
|
|
|
|
mapped_file_region::mapmode mapped_file_region::flags() const {
|
|
assert(Mapping && "Mapping failed but used anyway!");
|
|
return Mode;
|
|
}
|
|
|
|
uint64_t mapped_file_region::size() const {
|
|
assert(Mapping && "Mapping failed but used anyway!");
|
|
return Size;
|
|
}
|
|
|
|
char *mapped_file_region::data() const {
|
|
assert(Mode != readonly && "Cannot get non const data for readonly mapping!");
|
|
assert(Mapping && "Mapping failed but used anyway!");
|
|
return reinterpret_cast<char*>(Mapping);
|
|
}
|
|
|
|
const char *mapped_file_region::const_data() const {
|
|
assert(Mapping && "Mapping failed but used anyway!");
|
|
return reinterpret_cast<const char*>(Mapping);
|
|
}
|
|
|
|
int mapped_file_region::alignment() {
|
|
SYSTEM_INFO SysInfo;
|
|
::GetSystemInfo(&SysInfo);
|
|
return SysInfo.dwAllocationGranularity;
|
|
}
|
|
|
|
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 error_code::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 error_code::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 error_code::success();
|
|
}
|
|
|
|
error_code map_file_pages(const Twine &path, off_t file_offset, size_t size,
|
|
bool map_writable, void *&result) {
|
|
assert(0 && "NOT IMPLEMENTED");
|
|
return windows_error::invalid_function;
|
|
}
|
|
|
|
error_code unmap_file_pages(void *base, size_t size) {
|
|
assert(0 && "NOT IMPLEMENTED");
|
|
return windows_error::invalid_function;
|
|
}
|
|
|
|
|
|
|
|
} // end namespace fs
|
|
} // end namespace sys
|
|
} // end namespace llvm
|