DirectXShaderCompiler/lib/Support/MSFileSystemBasic.cpp at main · microsoft/DirectXShaderCompiler · GitHub

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//===- llvm/Support/Windows/MSFileSystemBasic.cpp DXComplier Impl *- C++

//-*-===//

///////////////////////////////////////////////////////////////////////////////

// //

// MSFileSystemBasic.cpp //

// This file is distributed under the University of Illinois Open Source //

// License. See LICENSE.TXT for details. //

// //

// This file implements the DXCompiler specific implementation of the Path

// API.//

// //

///////////////////////////////////////////////////////////////////////////////

#ifdef _WIN32

#include "dxc/Support/WinIncludes.h"

#include <assert.h>

#include <d3dcommon.h>

#include <errno.h>

#include <fcntl.h>

#include <io.h>

#include <new>

#include <stdint.h>

#include <sys/stat.h>

#include <sys/types.h>

#include <unordered_map>

#include "dxc/Support/Global.h"

#include "llvm/Support/MSFileSystem.h"

#include "dxc/dxcapi.internal.h"

///////////////////////////////////////////////////////////////////////////////////////////////////

// Externally visible functions.

/// <summary>Creates an implementation based on IDxcSystemAccess.</summary>

HRESULT

CreateMSFileSystemForIface(IUnknown *pService,

::llvm::sys::fs::MSFileSystem **pResult) throw();

/// <summary>Creates an implementation with no access to system

/// resources.</summary>

HRESULT

CreateMSFileSystemBlocked(::llvm::sys::fs::MSFileSystem **pResult) throw();

///////////////////////////////////////////////////////////////////////////////////////////////////

// Helper functions.

static DWORD WIN32_FROM_HRESULT(HRESULT hr) {

if (SUCCEEDED(hr))

return ERROR_SUCCESS;

if ((HRESULT)(hr & 0xFFFF0000) ==

MAKE_HRESULT(SEVERITY_ERROR, FACILITY_WIN32, 0)) {

// Could have come from many values, but we choose this one

return HRESULT_CODE(hr);

}

if (hr == E_OUTOFMEMORY)

return ERROR_OUTOFMEMORY;

if (hr == E_NOTIMPL)

return ERROR_CALL_NOT_IMPLEMENTED;

return ERROR_FUNCTION_FAILED;

}

static HRESULT CopyStatStg(const STATSTG *statStg,

LPWIN32_FIND_DATAW lpFindFileData) {

HRESULT hr = S_OK;

lpFindFileData->dwFileAttributes = FILE_ATTRIBUTE_NORMAL;

lpFindFileData->ftCreationTime = statStg->ctime;

lpFindFileData->ftLastAccessTime = statStg->atime;

lpFindFileData->ftLastWriteTime = statStg->mtime;

lpFindFileData->nFileSizeLow = statStg->cbSize.LowPart;

lpFindFileData->nFileSizeHigh = statStg->cbSize.HighPart;

if (statStg->pwcsName != nullptr) {

IFC(StringCchCopyW(lpFindFileData->cFileName,

_countof(lpFindFileData->cFileName), statStg->pwcsName));

}

Cleanup:

return hr;

}

static void ClearStatStg(STATSTG *statStg) {

DXASSERT_NOMSG(statStg != nullptr);

if (statStg->pwcsName != nullptr) {

CoTaskMemFree(statStg->pwcsName);

statStg->pwcsName = nullptr;

}

///////////////////////////////////////////////////////////////////////////////////////////////////

// IDxcSystemAccess-based MSFileSystem implementation.

struct MSFileSystemHandle {

enum MSFileSystemHandleKind {

MSFileSystemHandleKind_FindHandle,

MSFileSystemHandleKind_FileHandle,

MSFileSystemHandleKind_FileMappingHandle

};

MSFileSystemHandleKind kind;

CComPtr<IUnknown>

storage; // For a file handle, the stream or directory handle.

// For a find handle, the IEnumSTATSTG associated.

CComPtr<IStream>

stream; // For a file or console file handle, the stream interface.

int fd; // For a file handle, its file descriptor.

explicit MSFileSystemHandle(int knownFD)

: kind(MSFileSystemHandleKind_FileHandle), fd(knownFD) {}

explicit MSFileSystemHandle(IUnknown *pMapping)

: kind(MSFileSystemHandleKind_FileMappingHandle), storage(pMapping),

fd(0) {}

MSFileSystemHandle(IUnknown *pStorage, IStream *pStream)

: kind(MSFileSystemHandleKind_FileHandle), storage(pStorage),

stream(pStream), fd(0) {}

explicit MSFileSystemHandle(IEnumSTATSTG *pEnumSTATG)

: kind(MSFileSystemHandleKind_FindHandle), storage(pEnumSTATG) {}

MSFileSystemHandle(MSFileSystemHandle &&other) {

kind = other.kind;

storage.p = other.storage.Detach();

stream.p = other.stream.Detach();

}

HANDLE GetHandle() const { return (HANDLE)this; }

IEnumSTATSTG *GetEnumStatStg() {

DXASSERT(kind == MSFileSystemHandleKind_FindHandle,

"otherwise caller didn't check");

return (IEnumSTATSTG *)storage.p;

}

};

namespace llvm {

namespace sys {

namespace fs {

class MSFileSystemForIface : public MSFileSystem {

private:

CComPtr<IDxcSystemAccess> m_system;

typedef std::unordered_multimap<LPCVOID, ID3D10Blob *> TViewMap;

TViewMap m_mappingViews;

MSFileSystemHandle m_knownHandle0;

MSFileSystemHandle m_knownHandle1;

MSFileSystemHandle m_knownHandle2;

HRESULT AddFindHandle(IEnumSTATSTG *enumStatStg, HANDLE *pResult) throw();

HRESULT AddFileHandle(IUnknown *storage, IStream *stream,

HANDLE *pResult) throw();

HRESULT AddMappingHandle(IUnknown *mapping, HANDLE *pResult) throw();

HRESULT AddMappingView(ID3D10Blob *blob) throw();

HRESULT EnsureFDAvailable(int fd);

HANDLE GetHandleForFD(int fd) throw();

void GetFindHandle(HANDLE findHandle, IEnumSTATSTG **enumStatStg) throw();

int GetHandleFD(HANDLE fileHandle) throw();

void GetHandleMapping(HANDLE fileHandle, IUnknown **pResult) throw();

void GetHandleStorage(HANDLE fileHandle, IUnknown **pResult) throw();

void GetHandleStream(HANDLE fileHandle, IStream **pResult) throw();

void CloseInternalHandle(HANDLE findHandle) throw();

void RemoveMappingView(LPCVOID address) throw();

public:

MSFileSystemForIface(IDxcSystemAccess *access);

virtual BOOL

FindNextFileW(HANDLE hFindFile,

LPWIN32_FIND_DATAW lpFindFileData) throw() override;

virtual HANDLE

FindFirstFileW(LPCWSTR lpFileName,

LPWIN32_FIND_DATAW lpFindFileData) throw() override;

virtual void FindClose(HANDLE findHandle) throw() override;

virtual HANDLE CreateFileW(LPCWSTR lpFileName, DWORD dwDesiredAccess,

DWORD dwShareMode, DWORD dwCreationDisposition,

DWORD dwFlagsAndAttributes) throw() override;

virtual BOOL SetFileTime(HANDLE hFile, const FILETIME *lpCreationTime,

const FILETIME *lpLastAccessTime,

const FILETIME *lpLastWriteTime) throw() override;

virtual BOOL GetFileInformationByHandle(

HANDLE hFile,

LPBY_HANDLE_FILE_INFORMATION lpFileInformation) throw() override;

virtual DWORD GetFileType(HANDLE hFile) throw() override;

virtual BOOL CreateHardLinkW(LPCWSTR lpFileName,

LPCWSTR lpExistingFileName) throw() override;

virtual BOOL MoveFileExW(LPCWSTR lpExistingFileName, LPCWSTR lpNewFileName,

DWORD dwFlags) throw() override;

virtual DWORD GetFileAttributesW(LPCWSTR lpFileName) throw() override;

virtual BOOL CloseHandle(HANDLE hObject) throw() override;

virtual BOOL DeleteFileW(LPCWSTR lpFileName) throw() override;

virtual BOOL RemoveDirectoryW(LPCWSTR lpFileName) throw() override;

virtual BOOL CreateDirectoryW(LPCWSTR lpPathName) throw() override;

virtual DWORD GetCurrentDirectoryW(DWORD nBufferLength,

LPWSTR lpBuffer) throw() override;

virtual DWORD GetMainModuleFileNameW(LPWSTR lpFilename,

DWORD nSize) throw() override;

virtual DWORD GetTempPathW(DWORD nBufferLength,

LPWSTR lpBuffer) throw() override;

virtual BOOLEAN CreateSymbolicLinkW(LPCWSTR lpSymlinkFileName,

LPCWSTR lpTargetFileName,

DWORD dwFlags) throw() override;

virtual bool SupportsCreateSymbolicLink() throw() override;

virtual BOOL ReadFile(HANDLE hFile, LPVOID lpBuffer,

DWORD nNumberOfBytesToRead,

LPDWORD lpNumberOfBytesRead) throw() override;

virtual HANDLE CreateFileMappingW(HANDLE hFile, DWORD flProtect,

DWORD dwMaximumSizeHigh,

DWORD dwMaximumSizeLow) throw() override;

virtual LPVOID MapViewOfFile(HANDLE hFileMappingObject, DWORD dwDesiredAccess,

DWORD dwFileOffsetHigh, DWORD dwFileOffsetLow,

SIZE_T dwNumberOfBytesToMap) throw() override;

virtual BOOL UnmapViewOfFile(LPCVOID lpBaseAddress) throw() override;

// Console APIs.

virtual bool FileDescriptorIsDisplayed(int fd) throw() override;

virtual unsigned GetColumnCount(DWORD nStdHandle) throw() override;

virtual unsigned GetConsoleOutputTextAttributes() throw() override;

virtual void

SetConsoleOutputTextAttributes(unsigned attributes) throw() override;

virtual void ResetConsoleOutputTextAttributes() throw() override;

// CRT APIs.

virtual int open_osfhandle(intptr_t osfhandle, int flags) throw() override;

virtual intptr_t get_osfhandle(int fd) throw() override;

virtual int close(int fd) throw() override;

virtual long lseek(int fd, long offset, int origin) throw() override;

virtual int setmode(int fd, int mode) throw() override;

virtual errno_t resize_file(LPCWSTR path, uint64_t size) throw() override;

virtual int Read(int fd, void *buffer, unsigned int count) throw() override;

virtual int Write(int fd, const void *buffer,

unsigned int count) throw() override;

#ifndef _WIN32

virtual int Open(const char *lpFileName, int flags,

mode_t mode) throw() override;

virtual int Stat(const char *lpFileName,

struct stat *Status) throw() override;

virtual int Fstat(int FD, struct stat *Status) throw() override;

#endif

};

MSFileSystemForIface::MSFileSystemForIface(IDxcSystemAccess *systemAccess)

: m_system(systemAccess), m_knownHandle0(0), m_knownHandle1(1),

m_knownHandle2(2) {}

HRESULT MSFileSystemForIface::AddMappingHandle(IUnknown *mapping,

HANDLE *pResult) throw() {

DXASSERT_NOMSG(mapping != nullptr);

DXASSERT_NOMSG(pResult != nullptr);

HRESULT hr = S_OK;

MSFileSystemHandle *handle = nullptr;

*pResult = INVALID_HANDLE_VALUE;

handle = new (std::nothrow) MSFileSystemHandle(mapping);

IFCOOM(handle);

*pResult = handle->GetHandle();

Cleanup:

return hr;

}

HRESULT MSFileSystemForIface::AddMappingView(ID3D10Blob *blob) throw() {

DXASSERT_NOMSG(blob != nullptr);

LPVOID address = blob->GetBufferPointer();

try {

m_mappingViews.insert(std::pair<LPVOID, ID3D10Blob *>(address, blob));

} catch (std::bad_alloc &) {

return E_OUTOFMEMORY;

}

blob->AddRef();

return S_OK;

}

HRESULT MSFileSystemForIface::AddFindHandle(IEnumSTATSTG *enumStatStg,

HANDLE *pResult) throw() {

DXASSERT_NOMSG(enumStatStg != nullptr);

DXASSERT_NOMSG(pResult != nullptr);

HRESULT hr = S_OK;

MSFileSystemHandle *handle = nullptr;

*pResult = INVALID_HANDLE_VALUE;

handle = new (std::nothrow) MSFileSystemHandle(enumStatStg);

IFCOOM(handle);

*pResult = handle->GetHandle();

Cleanup:

return hr;

}

HRESULT MSFileSystemForIface::AddFileHandle(IUnknown *storage, IStream *stream,

HANDLE *pResult) throw() {

DXASSERT_NOMSG(storage != nullptr);

DXASSERT_NOMSG(pResult != nullptr);

HRESULT hr = S_OK;

MSFileSystemHandle *handle = nullptr;

*pResult = INVALID_HANDLE_VALUE;

handle = new (std::nothrow) MSFileSystemHandle(storage, stream);

IFCOOM(handle);

*pResult = handle->GetHandle();

Cleanup:

return hr;

}

void MSFileSystemForIface::CloseInternalHandle(HANDLE handle) throw() {

DXASSERT_NOMSG(handle != nullptr);

DXASSERT_NOMSG(handle != INVALID_HANDLE_VALUE);

MSFileSystemHandle *fsHandle = reinterpret_cast<MSFileSystemHandle *>(handle);

if (fsHandle == &m_knownHandle0 || fsHandle == &m_knownHandle1 ||

fsHandle == &m_knownHandle2) {

fsHandle->stream.Release();

fsHandle->storage.Release();

} else {

delete fsHandle;

}

void MSFileSystemForIface::RemoveMappingView(LPCVOID address) throw() {

TViewMap::iterator i = m_mappingViews.find(address);

DXASSERT(i != m_mappingViews.end(), "otherwise pointer to view isn't in map");

DXASSERT(i->second != nullptr,

"otherwise blob is null and should not have been added");

i->second->Release();

m_mappingViews.erase(i);

}

void MSFileSystemForIface::GetFindHandle(HANDLE findHandle,

IEnumSTATSTG **enumStatStg) throw() {

DXASSERT_NOMSG(findHandle != nullptr);

DXASSERT_NOMSG(enumStatStg != nullptr);

MSFileSystemHandle *fsHandle =

reinterpret_cast<MSFileSystemHandle *>(findHandle);

DXASSERT(fsHandle->kind ==

MSFileSystemHandle::MSFileSystemHandleKind_FindHandle,

"otherwise caller is passing wrong handle to API");

*enumStatStg = fsHandle->GetEnumStatStg();

DXASSERT(*enumStatStg != nullptr,

"otherwise it should not have been added to handle entry");

(*enumStatStg)->AddRef();

}

int MSFileSystemForIface::GetHandleFD(HANDLE fileHandle) throw() {

DXASSERT_NOMSG(fileHandle != nullptr);

MSFileSystemHandle *fsHandle =

reinterpret_cast<MSFileSystemHandle *>(fileHandle);

DXASSERT(fsHandle->kind ==

MSFileSystemHandle::MSFileSystemHandleKind_FileHandle,

"otherwise caller is passing wrong handle to API");

return fsHandle->fd;

}

void MSFileSystemForIface::GetHandleMapping(HANDLE mapping,

IUnknown **pResult) throw() {

DXASSERT_NOMSG(mapping != nullptr);

DXASSERT_NOMSG(pResult != nullptr);

MSFileSystemHandle *fsHandle =

reinterpret_cast<MSFileSystemHandle *>(mapping);

DXASSERT(fsHandle->kind ==

MSFileSystemHandle::MSFileSystemHandleKind_FileMappingHandle,

"otherwise caller is passing wrong handle to API");

*pResult = fsHandle->storage.p;

DXASSERT(*pResult != nullptr,

"otherwise it should not be requested through GetHandleMapping");

(*pResult)->AddRef();

}

void MSFileSystemForIface::GetHandleStorage(HANDLE fileHandle,

IUnknown **pResult) throw() {

DXASSERT_NOMSG(fileHandle != nullptr);

DXASSERT_NOMSG(pResult != nullptr);

MSFileSystemHandle *fsHandle =

reinterpret_cast<MSFileSystemHandle *>(fileHandle);

DXASSERT(fsHandle->kind ==

MSFileSystemHandle::MSFileSystemHandleKind_FileHandle,

"otherwise caller is passing wrong handle to API");

*pResult = fsHandle->storage.p;

DXASSERT(*pResult != nullptr,

"otherwise it should not be requested through GetHandleStorage");

(*pResult)->AddRef();

}

void MSFileSystemForIface::GetHandleStream(HANDLE fileHandle,

IStream **pResult) throw() {

DXASSERT_NOMSG(fileHandle != nullptr);

DXASSERT_NOMSG(pResult != nullptr);

MSFileSystemHandle *fsHandle =

reinterpret_cast<MSFileSystemHandle *>(fileHandle);

DXASSERT(fsHandle->kind ==

MSFileSystemHandle::MSFileSystemHandleKind_FileHandle,

"otherwise caller is passing wrong handle to API");

*pResult = fsHandle->stream.p;

DXASSERT(*pResult != nullptr,

"otherwise it should not be requested through GetHandleStream");

(*pResult)->AddRef();

}

HANDLE MSFileSystemForIface::FindFirstFileW(

LPCWSTR lpFileName, LPWIN32_FIND_DATAW lpFindFileData) throw() {

HRESULT hr = S_OK;

CComPtr<IEnumSTATSTG> enumStatStg;

HANDLE resultValue = INVALID_HANDLE_VALUE;

STATSTG elt;

ULONG fetched;

ZeroMemory(&elt, sizeof(elt));

ZeroMemory(lpFindFileData, sizeof(*lpFindFileData));

fetched = 0;

IFC(m_system->EnumFiles(lpFileName, &enumStatStg));

IFC(enumStatStg->Next(1, &elt, &fetched));

if (fetched == 0) {

IFC(HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND));

} else {

IFC(CopyStatStg(&elt, lpFindFileData));

IFC(AddFindHandle(enumStatStg, &resultValue));

}

Cleanup:

ClearStatStg(&elt);

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

return INVALID_HANDLE_VALUE;

}

DXASSERT(resultValue != INVALID_HANDLE_VALUE,

"otherwise AddFindHandle failed to return a valid handle");

return resultValue;

}

BOOL MSFileSystemForIface::FindNextFileW(

HANDLE hFindFile, LPWIN32_FIND_DATAW lpFindFileData) throw() {

HRESULT hr = S_OK;

CComPtr<IEnumSTATSTG> enumStatStg;

STATSTG elt;

ULONG fetched;

ZeroMemory(&elt, sizeof(elt));

ZeroMemory(lpFindFileData, sizeof(*lpFindFileData));

fetched = 0;

GetFindHandle(hFindFile, &enumStatStg);

IFC(enumStatStg->Next(1, &elt, &fetched));

if (fetched == 0) {

IFC(HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND));

} else {

IFC(CopyStatStg(&elt, lpFindFileData));

}

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

return FALSE;

}

return TRUE;

}

void MSFileSystemForIface::FindClose(HANDLE findHandle) throw() {

CloseInternalHandle(findHandle);

}

HANDLE MSFileSystemForIface::CreateFileW(LPCWSTR lpFileName,

DWORD dwDesiredAccess,

DWORD dwShareMode,

DWORD dwCreationDisposition,

DWORD dwFlagsAndAttributes) throw() {

HRESULT hr = S_OK;

CComPtr<IUnknown> storage;

CComPtr<IStream> stream;

HANDLE resultHandle = INVALID_HANDLE_VALUE;

IFC(m_system->OpenStorage(lpFileName, dwDesiredAccess, dwShareMode,

dwCreationDisposition, dwFlagsAndAttributes,

&storage));

IFC(storage.QueryInterface(&stream));

IFC(AddFileHandle(storage, stream, &resultHandle));

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

return INVALID_HANDLE_VALUE;

}

return resultHandle;

}

BOOL MSFileSystemForIface::SetFileTime(

HANDLE hFile, const FILETIME *lpCreationTime,

const FILETIME *lpLastAccessTime, const FILETIME *lpLastWriteTime) throw() {

HRESULT hr = S_OK;

CComPtr<IUnknown> storage;

GetHandleStorage(hFile, &storage);

IFC(m_system->SetStorageTime(storage, lpCreationTime, lpLastAccessTime,

lpLastWriteTime));

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

return FALSE;

}

return TRUE;

}

BOOL MSFileSystemForIface::GetFileInformationByHandle(

HANDLE hFile, LPBY_HANDLE_FILE_INFORMATION lpFileInformation) throw() {

HRESULT hr = S_OK;

CComPtr<IUnknown> storage;

GetHandleStorage(hFile, &storage);

IFC(m_system->GetFileInformationForStorage(storage, lpFileInformation));

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

return FALSE;

}

return TRUE;

}

DWORD MSFileSystemForIface::GetFileType(HANDLE hFile) throw() {

HRESULT hr = S_OK;

CComPtr<IUnknown> storage;

DWORD fileType;

GetHandleStorage(hFile, &storage);

IFC(m_system->GetFileTypeForStorage(storage, &fileType));

if (fileType == FILE_TYPE_UNKNOWN) {

SetLastError(NO_ERROR);

}

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

fileType = FILE_TYPE_UNKNOWN;

}

return fileType;

}

BOOL MSFileSystemForIface::CreateHardLinkW(LPCWSTR lpFileName,

LPCWSTR lpExistingFileName) throw() {

SetLastError(ERROR_FUNCTION_NOT_CALLED);

return FALSE;

}

BOOL MSFileSystemForIface::MoveFileExW(LPCWSTR lpExistingFileName,

LPCWSTR lpNewFileName,

DWORD dwFlags) throw() {

SetLastError(ERROR_FUNCTION_NOT_CALLED);

return FALSE;

}

DWORD MSFileSystemForIface::GetFileAttributesW(LPCWSTR lpFileName) throw() {

HRESULT hr = S_OK;

DWORD attributes;

IFC(m_system->GetFileAttributesForStorage(lpFileName, &attributes));

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

attributes = INVALID_FILE_ATTRIBUTES;

}

return attributes;

}

BOOL MSFileSystemForIface::CloseHandle(HANDLE hObject) throw() {

this->CloseInternalHandle(hObject);

return TRUE;

}

BOOL MSFileSystemForIface::DeleteFileW(LPCWSTR lpFileName) throw() {

SetLastError(ERROR_FUNCTION_NOT_CALLED);

return FALSE;

}

BOOL MSFileSystemForIface::RemoveDirectoryW(LPCWSTR lpFileName) throw() {

SetLastError(ERROR_FUNCTION_NOT_CALLED);

return FALSE;

}

BOOL MSFileSystemForIface::CreateDirectoryW(LPCWSTR lpPathName) throw() {

SetLastError(ERROR_FUNCTION_NOT_CALLED);

return FALSE;

}

DWORD MSFileSystemForIface::GetCurrentDirectoryW(DWORD nBufferLength,

LPWSTR lpBuffer) throw() {

DWORD written = 0;

HRESULT hr = S_OK;

IFC(m_system->GetCurrentDirectoryForStorage(nBufferLength, lpBuffer,

&written));

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

return 0;

}

return written;

}

DWORD MSFileSystemForIface::GetMainModuleFileNameW(LPWSTR lpFilename,

DWORD nSize) throw() {

DWORD written = 0;

HRESULT hr = S_OK;

IFC(m_system->GetMainModuleFileNameW(nSize, lpFilename, &written));

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

return 0;

}

return written;

}

DWORD MSFileSystemForIface::GetTempPathW(DWORD nBufferLength,

LPWSTR lpBuffer) throw() {

DWORD written = 0;

HRESULT hr = S_OK;

IFC(m_system->GetTempStoragePath(nBufferLength, lpBuffer, &written));

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

return 0;

}

return written;

}

BOOLEAN MSFileSystemForIface::CreateSymbolicLinkW(LPCWSTR lpSymlinkFileName,

LPCWSTR lpTargetFileName,

DWORD dwFlags) throw() {

SetLastError(ERROR_FUNCTION_NOT_CALLED);

return FALSE;

}

bool MSFileSystemForIface::SupportsCreateSymbolicLink() throw() {

return false;

}

BOOL MSFileSystemForIface::ReadFile(HANDLE hFile, LPVOID lpBuffer,

DWORD nNumberOfBytesToRead,

LPDWORD lpNumberOfBytesRead) throw() {

HRESULT hr = S_OK;

CComPtr<IStream> stream;

GetHandleStream(hFile, &stream);

ULONG cbRead;

IFC(stream->Read(lpBuffer, nNumberOfBytesToRead, &cbRead));

if (lpNumberOfBytesRead != nullptr) {

*lpNumberOfBytesRead = cbRead;

}

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

return FALSE;

}

return TRUE;

}

HANDLE

MSFileSystemForIface::CreateFileMappingW(HANDLE hFile, DWORD flProtect,

DWORD dwMaximumSizeHigh,

DWORD dwMaximumSizeLow) throw() {

HRESULT hr = S_OK;

HANDLE result = INVALID_HANDLE_VALUE;

CComPtr<IUnknown> storage;

CComPtr<IUnknown> mapping;

GetHandleStorage(hFile, &storage);

IFC(m_system->CreateStorageMapping(storage, flProtect, dwMaximumSizeHigh,

dwMaximumSizeLow, &mapping));

IFC(AddMappingHandle(mapping, &result));

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

return INVALID_HANDLE_VALUE;

}

return result;

}

LPVOID MSFileSystemForIface::MapViewOfFile(

HANDLE hFileMappingObject, DWORD dwDesiredAccess, DWORD dwFileOffsetHigh,

DWORD dwFileOffsetLow, SIZE_T dwNumberOfBytesToMap) throw() {

HRESULT hr = S_OK;

CComPtr<IUnknown> mapping;

CComPtr<ID3D10Blob> blob;

GetHandleMapping(hFileMappingObject, &mapping);

IFC(m_system->MapViewOfFile(mapping, dwDesiredAccess, dwFileOffsetHigh,

dwFileOffsetLow, dwNumberOfBytesToMap, &blob));

IFC(AddMappingView(blob));

Cleanup:

if (FAILED(hr)) {

SetLastError(WIN32_FROM_HRESULT(hr));

return INVALID_HANDLE_VALUE;

}

return blob->GetBufferPointer();

}

BOOL MSFileSystemForIface::UnmapViewOfFile(LPCVOID lpBaseAddress) throw() {

RemoveMappingView(lpBaseAddress);

return TRUE;

}

bool MSFileSystemForIface::FileDescriptorIsDisplayed(int fd) throw() {

return false;

}

unsigned MSFileSystemForIface::GetColumnCount(DWORD nStdHandle) throw() {

return 0;

}

unsigned MSFileSystemForIface::GetConsoleOutputTextAttributes() throw() {

return 0;

}

void MSFileSystemForIface::SetConsoleOutputTextAttributes(

unsigned attributes) throw() {

return;

}

void MSFileSystemForIface::ResetConsoleOutputTextAttributes() throw() {}

int MSFileSystemForIface::open_osfhandle(intptr_t osfhandle,

int flags) throw() {

return GetHandleFD((HANDLE)osfhandle);

}

HRESULT MSFileSystemForIface::EnsureFDAvailable(int fd) {

MSFileSystemHandle *ptr;

switch (fd) {

case 0:

ptr = &m_knownHandle0;

break;

case 1:

ptr = &m_knownHandle1;

break;

case 2:

ptr = &m_knownHandle2;

break;

default:

return S_OK;

}

HRESULT hr = S_OK;

if (ptr->storage == nullptr) {

CComPtr<IUnknown> storage;

CComPtr<IStream> stream;

IFC(m_system->OpenStdStorage(fd, &storage));

IFC(storage.QueryInterface(&stream));

ptr->storage = storage;

ptr->stream = stream;

}

DXASSERT(ptr->storage != nullptr,

"otherwise we should have failed to initialize");

DXASSERT(ptr->stream != nullptr,

"otherwise we should have failed to initialize - input/output/error "

"should support streams");

Cleanup:

return hr;

}

HANDLE MSFileSystemForIface::GetHandleForFD(int fd) throw() {

MSFileSystemHandle *ptr;

switch (fd) {

case 0:

ptr = &m_knownHandle0;

break;

case 1:

ptr = &m_knownHandle1;

break;

case 2:

ptr = &m_knownHandle2;

break;

default:

ptr = (MSFileSystemHandle *)(uintptr_t)fd;

break;

}

return ptr->GetHandle();

}

intptr_t MSFileSystemForIface::get_osfhandle(int fd) throw() {

if (FAILED(EnsureFDAvailable(fd))) {

errno = EBADF;

return -1;

}

return (intptr_t)GetHandleForFD(fd);

}

int MSFileSystemForIface::close(int fd) throw() {

HANDLE h = GetHandleForFD(fd);

this->CloseInternalHandle(h);

return 0;

}

long MSFileSystemForIface::lseek(int fd, long offset, int origin) throw() {

HRESULT hr = S_OK;

CComPtr<IStream> stream;

LARGE_INTEGER li;

ULARGE_INTEGER uli;

if (FAILED(EnsureFDAvailable(fd))) {

errno = EBADF;

return -1;

}

GetHandleStream(GetHandleForFD(fd), &stream);

li.HighPart = 0;

li.LowPart = offset;

IFC(stream->Seek(li, origin, &uli));

Cleanup:

if (FAILED(hr)) {

errno = EINVAL;

return -1;

}

if (uli.HighPart > 0) {

errno = EOVERFLOW;

return -1;

}

return uli.LowPart;

}

int MSFileSystemForIface::setmode(int fd, int mode) throw() { return 0; }

errno_t MSFileSystemForIface::resize_file(LPCWSTR path, uint64_t size) throw() {

return EBADF;

}

int MSFileSystemForIface::Read(int fd, void *buffer,

unsigned int count) throw() {

HRESULT hr = S_OK;

CComPtr<IStream> stream;

ULONG cbRead = 0;

if (FAILED(EnsureFDAvailable(fd))) {

errno = EBADF;

return -1;

}

GetHandleStream(GetHandleForFD(fd), &stream);

IFC(stream->Read(buffer, count, &cbRead));

Cleanup:

if (FAILED(hr)) {

errno = EINVAL;

return -1;

}

return (int)cbRead;

}

int MSFileSystemForIface::Write(int fd, const void *buffer,

unsigned int count) throw() {

HRESULT hr = S_OK;

CComPtr<IStream> stream;

ULONG cbWritten = 0;

if (FAILED(EnsureFDAvailable(fd))) {

errno = EBADF;

return -1;

}

GetHandleStream(GetHandleForFD(fd), &stream);

IFC(stream->Write(buffer, count, &cbWritten));

Cleanup:

if (FAILED(hr)) {

errno = EINVAL;

return -1;

}

return (int)cbWritten;

}

#ifndef _WIN32

int MSFileSystemForIface::Open(const char *lpFileName, int flags,

mode_t mode) throw() {

SetLastError(ERROR_FUNCTION_NOT_CALLED);

return FALSE;

}

int MSFileSystemForIface::Stat(const char *lpFileName,

struct stat *Status) throw() {

SetLastError(ERROR_FUNCTION_NOT_CALLED);

return FALSE;

}

int MSFileSystemForIface::Fstat(int FD, struct stat *Status) throw() {

SetLastError(ERROR_FUNCTION_NOT_CALLED);

return FALSE;

}

#endif

} // end namespace fs

} // end namespace sys

} // end namespace llvm

///////////////////////////////////////////////////////////////////////////////////////////////////

// Blocked MSFileSystem implementation.

#ifndef NDEBUG

static void MSFileSystemBlockedCalled() { DebugBreak(); }

#else

static void MSFileSystemBlockedCalled() {}

#endif

static BOOL MSFileSystemBlockedErrWin32() {

MSFileSystemBlockedCalled();

SetLastError(ERROR_FUNCTION_NOT_CALLED);

return FALSE;

}

static HANDLE MSFileSystemBlockedHandle() {

MSFileSystemBlockedCalled();

SetLastError(ERROR_FUNCTION_NOT_CALLED);

return INVALID_HANDLE_VALUE;

}

static int MSFileSystemBlockedErrno() {

MSFileSystemBlockedCalled();

errno = EBADF;

return -1;

}

static int MSFileSystemBlockedErrnoT() {

MSFileSystemBlockedCalled();

return EBADF;

}

namespace llvm {

namespace sys {

namespace fs {

class MSFileSystemBlocked : public MSFileSystem {

private:

public:

MSFileSystemBlocked();

virtual BOOL FindNextFileW(HANDLE, LPWIN32_FIND_DATAW) throw() override {

return MSFileSystemBlockedErrWin32();

}

virtual HANDLE

FindFirstFileW(LPCWSTR lpFileName,

LPWIN32_FIND_DATAW lpFindFileData) throw() override {

return MSFileSystemBlockedHandle();

}

virtual void FindClose(HANDLE findHandle) throw() override {

MSFileSystemBlockedCalled();

}

virtual HANDLE CreateFileW(LPCWSTR lpFileName, DWORD dwDesiredAccess,

DWORD dwShareMode, DWORD dwCreationDisposition,

DWORD dwFlagsAndAttributes) throw() override {

return MSFileSystemBlockedHandle();

}

virtual BOOL SetFileTime(HANDLE hFile, const FILETIME *lpCreationTime,

const FILETIME *lpLastAccessTime,

const FILETIME *lpLastWriteTime) throw() override {

return MSFileSystemBlockedErrWin32();

View remainder of file in raw view

DirectXShaderCompiler/lib/Support/MSFileSystemBasic.cpp at main · microsoft/DirectXShaderCompiler · GitHub

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