AuroraRuntime/Source/IO/FS/FS.NT.cpp
Reece Wilson 1de0bdb4e7 [*] NT ReadFile: replace GENERIC_READ, FILE_SHARE_READ with GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE
[*] ByteBuffer::IsValid() will now return true if there is no underlying buffer so long as the object is marked with the dynamic scaling flag (no contents isnt an invalid state; alloc failure on construct and ad-hoc failure is. latterly, specify the write flag on failure in the ByteBuffer::Write method.) the alloc error can be safely unwound by state raii helpers bc realloc and frens will not free or dirty the state. write-fail-aware may roll back the write head, like how readers can roll back the read head if the stream is incomplete.
2022-09-23 00:59:08 +01:00

407 lines
11 KiB
C++

/***
Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
File: FS.NT.cpp
Date: 2021-6-12
Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "FS.hpp"
#include "FS.Generic.hpp"
#include <Source/Time/Time.hpp>
#if !defined(_AURUNTIME_GENERICFS)
namespace Aurora::IO::FS
{
static const AuUInt64 kFileCopyBlock = 0xFFFF; // 64KiB
bool _MkDir(const AuString &str)
{
return CreateDirectoryW(Locale::ConvertFromUTF8(str).c_str(), NULL);
}
struct ReadDirStructure : IReadDir
{
HANDLE hFind {INVALID_HANDLE_VALUE};
WIN32_FIND_DATAW ffd;
bool bFirstTick {true};
bool bDead {false};
StatEx stat;
AuString sPath;
~ReadDirStructure()
{
::FindClose(this->hFind);
}
virtual StatEx *Next() override
{
if (!AuExchange(this->bFirstTick, false))
{
if (::FindNextFileW(this->hFind, &this->ffd) == 0)
{
return {};
}
}
if (this->bDead)
{
return {};
}
if (this->ffd.cFileName == std::wstring(L".") ||
this->ffd.cFileName == std::wstring(L".."))
{
return Next();
}
stat.bExists = true;
stat.fileName = Locale::ConvertFromWChar(this->ffd.cFileName);
if (stat.fileName.empty())
{
this->bDead = true;
return {};
}
stat.path = NormalizePathRet(this->sPath + stat.fileName);
if (stat.path.empty())
{
this->bDead = true;
return {};
}
stat.bExistsDirectory = this->ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
stat.bExistsFile = !stat.bExistsDirectory;
stat.bSymLink = this->ffd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT;
stat.uSize = AuUInt64(this->ffd.nFileSizeLow) | (AuUInt64(this->ffd.nFileSizeHigh) << 32);
stat.created = Time::ConvertTimestamp(this->ffd.ftCreationTime);
stat.modified = Time::ConvertTimestamp(this->ffd.ftLastWriteTime);
stat.accessed = Time::ConvertTimestamp(this->ffd.ftLastAccessTime);
return &stat;
}
};
AUKN_SYM AuSPtr<IReadDir> ReadDir(const AuString &string)
{
auto pObj = AuMakeShared<ReadDirStructure>();
if (!pObj)
{
SysPushErrorMem();
return {};
}
if (!AuIOFS::NormalizePath(pObj->sPath, string))
{
SysPushErrorMem();
return {};
}
if (!AuTryInsert(pObj->sPath, '\\'))
{
SysPushErrorMem();
return {};
}
pObj->hFind = ::FindFirstFileW(AuLocale::ConvertFromUTF8(pObj->sPath + "*").c_str(), &pObj->ffd);
if (INVALID_HANDLE_VALUE == pObj->hFind)
{
SysPushErrorIO();
return {};
}
return pObj;
}
AUKN_SYM bool FilesInDirectory(const AuString &string, AuList<AuString> &files)
{
auto itr = ReadDir(string);
if (!itr)
{
return false;
}
// SECURITY(): if next fails, its indistinguishable from end of file list, and will return true. it kinda sucks
while (auto stat = itr->Next())
{
if (!stat->bExistsFile)
{
continue;
}
if (!AuTryInsert(files, stat->fileName))
{
return false;
}
}
return true;
}
AUKN_SYM bool DirsInDirectory(const AuString &string, AuList<AuString> &dirs)
{
auto itr = ReadDir(string);
if (!itr)
{
return false;
}
// SECURITY(): if next fails, its indistinguishable from end of file list, and will return true. it kinda sucks
while (auto stat = itr->Next())
{
if (!stat->bExistsDirectory)
{
continue;
}
if (!AuTryInsert(dirs, stat->fileName))
{
return false;
}
}
return true;
}
AUKN_SYM bool WriteFile(const AuString &path, const Memory::MemoryViewRead &blob)
{
bool status;
size_t offset;
HANDLE fileHandle;
std::wstring win32Path;
AuString pathNormalized;
AuUInt length;
status = false;
pathNormalized = NormalizePathRet(path);
if (pathNormalized.empty())
{
return false;
}
win32Path = Locale::ConvertFromUTF8(pathNormalized);
if (win32Path.empty())
{
return false;
}
CreateDirectories(pathNormalized, true);
fileHandle = CreateFileW(win32Path.c_str(), GENERIC_WRITE, NULL, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (fileHandle == INVALID_HANDLE_VALUE)
{
SysPushErrorIO("Couldn't open handle: {}", path);
return false;
}
length = blob.length;
offset = 0;
while (length)
{
DWORD written;
int blockSize = AuMin(static_cast<AuUInt64>(kFileCopyBlock), static_cast<AuUInt64>(length));
if (!::WriteFile(fileHandle, &reinterpret_cast<const char *>(blob.ptr)[offset], blockSize, &written, NULL))
{
SysPushErrorIO();
goto out;
}
if (written != blockSize)
{
SysPushErrorIO();
goto out;
}
offset += written;
length -= written;
}
status = true;
out:
AuWin32CloseHandle(fileHandle);
return status;
}
AUKN_SYM bool ReadFile(const AuString &path, AuByteBuffer &buffer)
{
std::wstring win32Path;
LARGE_INTEGER length;
bool status;
AuMemoryViewWrite writeView;
size_t offset;
status = false;
offset = 0;
win32Path = Locale::ConvertFromUTF8(NormalizePathRet(path));
if (win32Path.empty())
{
return false;
}
auto fileHandle = CreateFileW(win32Path.c_str(), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (fileHandle == INVALID_HANDLE_VALUE)
{
SysPushErrorIO("Couldn't open handle: {}", path);
return false;
}
if (!GetFileSizeEx(fileHandle, &length))
{
SysPushErrorIO();
goto out;
}
writeView = buffer.GetOrAllocateLinearWriteable(length.QuadPart);
if (!writeView)
{
SysPushErrorMem();
goto out;
}
while (length.QuadPart)
{
DWORD read;
int blockSize = AuMin(static_cast<AuUInt64>(kFileCopyBlock), static_cast<AuUInt64>(length.QuadPart));
if (!::ReadFile(fileHandle, buffer.writePtr, blockSize, &read, NULL))
{
AuLogWarn("ReadFile IO Error: 0x{:x} {}", GetLastError(), path);
SysPushErrorIO();
goto out;
}
buffer.writePtr += read;
offset += read;
length.QuadPart -= read;
}
status = true;
out:
AuWin32CloseHandle(fileHandle);
return status;
}
AUKN_SYM bool FileExists(const AuString &path)
{
try
{
DWORD dwAttrib = GetFileAttributesW(Locale::ConvertFromUTF8(NormalizePathRet(path)).c_str());
return ((dwAttrib != INVALID_FILE_ATTRIBUTES) &&
!(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
}
catch (...)
{
return false;
}
}
AUKN_SYM bool DirExists(const AuString &path)
{
try
{
DWORD dwAttrib = GetFileAttributesW(Locale::ConvertFromUTF8(NormalizePathRet(path)).c_str());
return ((dwAttrib != INVALID_FILE_ATTRIBUTES) &&
(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
}
catch (...)
{
return false;
}
}
AUKN_SYM bool DirMk(const AuString &path)
{
try
{
return CreateDirectories(NormalizePathRet(path), false);
}
catch (...)
{
return false;
}
}
AUKN_SYM bool Remove(const AuString &path)
{
try
{
auto translatedPath = Locale::ConvertFromUTF8(NormalizePathRet(path));
if (::DeleteFileW(translatedPath.c_str()))
{
return true;
}
if (::RemoveDirectoryW(translatedPath.c_str()))
{
return true;
}
return false;
}
catch (...)
{
return false;
}
}
AUKN_SYM bool Relink(const AuString &src, const AuString &dest)
{
try
{
return MoveFileW(Locale::ConvertFromUTF8(NormalizePathRet(src)).c_str(), Locale::ConvertFromUTF8(NormalizePathRet(dest)).c_str());
}
catch (...)
{
return false;
}
}
AUKN_SYM bool Copy(const AuString &src, const AuString &dest)
{
try
{
return CopyFileW(Locale::ConvertFromUTF8(NormalizePathRet(src)).c_str(), Locale::ConvertFromUTF8(NormalizePathRet(dest)).c_str(), true);
}
catch (...)
{
return false;
}
}
AUKN_SYM bool StatFile(const AuString &path, Stat &stat)
{
WIN32_FILE_ATTRIBUTE_DATA data;
stat = {};
if (!GetFileAttributesExW(Locale::ConvertFromUTF8(NormalizePathRet(path)).c_str(), GetFileExInfoStandard, &data))
{
stat.bExists = false;
return false;
}
stat.bExists = true;
stat.bExistsDirectory = data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
stat.bExistsFile = !stat.bExistsDirectory;
stat.bSymLink = data.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT;
stat.uSize = AuUInt64(data.nFileSizeLow) | (AuUInt64(data.nFileSizeHigh) << 32);
stat.created = Time::ConvertTimestamp(data.ftCreationTime);
stat.modified = Time::ConvertTimestamp(data.ftLastWriteTime);
stat.accessed = Time::ConvertTimestamp(data.ftLastAccessTime);
return true;
}
}
#endif