winamp/Src/external_dependencies/openmpt-trunk/common/mptFileIO.cpp

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2024-09-24 12:54:57 +00:00
/*
* mptFileIO.cpp
* -------------
* Purpose: File I/O wrappers
* Notes : (currently none)
* Authors: OpenMPT Devs
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
*/
#include "stdafx.h"
#include "mptFileIO.h"
#if defined(MPT_ENABLE_FILEIO)
#include "mpt/io/io.hpp"
#include "mpt/io/io_stdstream.hpp"
#if defined(MODPLUG_TRACKER) && MPT_OS_WINDOWS
#include "mpt/system_error/system_error.hpp"
#include "FileReader.h"
#endif // MODPLUG_TRACKER && MPT_OS_WINDOWS
#endif // MPT_ENABLE_FILEIO
#if defined(MPT_ENABLE_FILEIO)
#include <stdexcept>
#endif // MPT_ENABLE_FILEIO
#ifdef MODPLUG_TRACKER
#if MPT_OS_WINDOWS
#include <windows.h>
#include <WinIoCtl.h>
#include <io.h>
#endif // MPT_OS_WINDOWS
#endif // MODPLUG_TRACKER
#if defined(MPT_ENABLE_FILEIO)
#if MPT_COMPILER_MSVC
#include <stdio.h>
#include <tchar.h>
#endif // MPT_COMPILER_MSVC
#endif // MPT_ENABLE_FILEIO
OPENMPT_NAMESPACE_BEGIN
#if defined(MPT_ENABLE_FILEIO)
#if !defined(MPT_BUILD_SILENCE_LIBOPENMPT_CONFIGURATION_WARNINGS)
#if defined(MPT_COMPILER_QUIRK_WINDOWS_FSTREAM_NO_WCHAR)
#if MPT_GCC_BEFORE(9,1,0)
MPT_WARNING("Warning: MinGW with GCC earlier than 9.1 detected. Standard library does neither provide std::fstream wchar_t overloads nor std::filesystem with wchar_t support. Unicode filename support is thus unavailable.")
#endif // MPT_GCC_AT_LEAST(9,1,0)
#endif // MPT_COMPILER_QUIRK_WINDOWS_FSTREAM_NO_WCHAR
#endif // !MPT_BUILD_SILENCE_LIBOPENMPT_CONFIGURATION_WARNINGS
#ifdef MODPLUG_TRACKER
#if MPT_OS_WINDOWS
bool SetFilesystemCompression(HANDLE hFile)
{
if(hFile == INVALID_HANDLE_VALUE)
{
return false;
}
USHORT format = COMPRESSION_FORMAT_DEFAULT;
DWORD dummy = 0;
BOOL result = DeviceIoControl(hFile, FSCTL_SET_COMPRESSION, (LPVOID)&format, sizeof(format), NULL, 0, &dummy /*required*/ , NULL);
return result != FALSE;
}
bool SetFilesystemCompression(int fd)
{
if(fd < 0)
{
return false;
}
uintptr_t fhandle = _get_osfhandle(fd);
HANDLE hFile = (HANDLE)fhandle;
if(hFile == INVALID_HANDLE_VALUE)
{
return false;
}
return SetFilesystemCompression(hFile);
}
bool SetFilesystemCompression(const mpt::PathString &filename)
{
DWORD attributes = GetFileAttributes(filename.AsNativePrefixed().c_str());
if(attributes == INVALID_FILE_ATTRIBUTES)
{
return false;
}
if(attributes & FILE_ATTRIBUTE_COMPRESSED)
{
return true;
}
HANDLE hFile = CreateFile(filename.AsNativePrefixed().c_str(), GENERIC_ALL, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if(hFile == INVALID_HANDLE_VALUE)
{
return false;
}
bool result = SetFilesystemCompression(hFile);
CloseHandle(hFile);
return result;
}
#endif // MPT_OS_WINDOWS
#endif // MODPLUG_TRACKER
#ifdef MODPLUG_TRACKER
namespace mpt {
#if MPT_COMPILER_MSVC
mpt::tstring SafeOutputFile::convert_mode(std::ios_base::openmode mode, FlushMode flushMode)
{
mpt::tstring fopen_mode;
switch(mode & ~(std::ios_base::ate | std::ios_base::binary))
{
case std::ios_base::in:
fopen_mode = _T("r");
break;
case std::ios_base::out:
[[fallthrough]];
case std::ios_base::out | std::ios_base::trunc:
fopen_mode = _T("w");
break;
case std::ios_base::app:
[[fallthrough]];
case std::ios_base::out | std::ios_base::app:
fopen_mode = _T("a");
break;
case std::ios_base::out | std::ios_base::in:
fopen_mode = _T("r+");
break;
case std::ios_base::out | std::ios_base::in | std::ios_base::trunc:
fopen_mode = _T("w+");
break;
case std::ios_base::out | std::ios_base::in | std::ios_base::app:
[[fallthrough]];
case std::ios_base::in | std::ios_base::app:
fopen_mode = _T("a+");
break;
}
if(fopen_mode.empty())
{
return fopen_mode;
}
if(mode & std::ios_base::binary)
{
fopen_mode += _T("b");
}
if(flushMode == FlushMode::Full)
{
fopen_mode += _T("c"); // force commit on fflush (MSVC specific)
}
return fopen_mode;
}
std::FILE * SafeOutputFile::internal_fopen(const mpt::PathString &filename, std::ios_base::openmode mode, FlushMode flushMode)
{
m_f = nullptr;
mpt::tstring fopen_mode = convert_mode(mode, flushMode);
if(fopen_mode.empty())
{
return nullptr;
}
std::FILE *f =
#ifdef UNICODE
_wfopen(filename.AsNativePrefixed().c_str(), fopen_mode.c_str())
#else
std::fopen(filename.AsNativePrefixed().c_str(), fopen_mode.c_str())
#endif
;
if(!f)
{
return nullptr;
}
if(mode & std::ios_base::ate)
{
if(std::fseek(f, 0, SEEK_END) != 0)
{
std::fclose(f);
f = nullptr;
return nullptr;
}
}
m_f = f;
return f;
}
#endif // MPT_COMPILER_MSVC
// cppcheck-suppress exceptThrowInDestructor
SafeOutputFile::~SafeOutputFile() noexcept(false)
{
const bool mayThrow = (std::uncaught_exceptions() == 0);
if(!stream())
{
#if MPT_COMPILER_MSVC
if(m_f)
{
std::fclose(m_f);
}
#endif // MPT_COMPILER_MSVC
if(mayThrow && (stream().exceptions() & (std::ios::badbit | std::ios::failbit)))
{
// cppcheck-suppress exceptThrowInDestructor
throw std::ios_base::failure(std::string("Error before flushing file buffers."));
}
return;
}
if(!stream().rdbuf())
{
#if MPT_COMPILER_MSVC
if(m_f)
{
std::fclose(m_f);
}
#endif // MPT_COMPILER_MSVC
if(mayThrow && (stream().exceptions() & (std::ios::badbit | std::ios::failbit)))
{
// cppcheck-suppress exceptThrowInDestructor
throw std::ios_base::failure(std::string("Error before flushing file buffers."));
}
return;
}
#if MPT_COMPILER_MSVC
if(!m_f)
{
return;
}
#endif // MPT_COMPILER_MSVC
bool errorOnFlush = false;
if(m_FlushMode != FlushMode::None)
{
try
{
if(stream().rdbuf()->pubsync() != 0)
{
errorOnFlush = true;
}
} catch(const std::exception &)
{
errorOnFlush = true;
#if MPT_COMPILER_MSVC
if(m_FlushMode != FlushMode::None)
{
if(std::fflush(m_f) != 0)
{
errorOnFlush = true;
}
}
if(std::fclose(m_f) != 0)
{
errorOnFlush = true;
}
#endif // MPT_COMPILER_MSVC
if(mayThrow)
{
// ignore errorOnFlush here, and re-throw the earlier exception
// cppcheck-suppress exceptThrowInDestructor
throw;
}
}
}
#if MPT_COMPILER_MSVC
if(m_FlushMode != FlushMode::None)
{
if(std::fflush(m_f) != 0)
{
errorOnFlush = true;
}
}
if(std::fclose(m_f) != 0)
{
errorOnFlush = true;
}
#endif // MPT_COMPILER_MSVC
if(mayThrow && errorOnFlush && (stream().exceptions() & (std::ios::badbit | std::ios::failbit)))
{
// cppcheck-suppress exceptThrowInDestructor
throw std::ios_base::failure(std::string("Error flushing file buffers."));
}
}
} // namespace mpt
#endif // MODPLUG_TRACKER
#ifdef MODPLUG_TRACKER
namespace mpt {
LazyFileRef & LazyFileRef::operator = (const std::vector<std::byte> &data)
{
mpt::ofstream file(m_Filename, std::ios::binary);
file.exceptions(std::ios_base::failbit | std::ios_base::badbit);
mpt::IO::WriteRaw(file, mpt::as_span(data));
mpt::IO::Flush(file);
return *this;
}
LazyFileRef & LazyFileRef::operator = (const std::vector<char> &data)
{
mpt::ofstream file(m_Filename, std::ios::binary);
file.exceptions(std::ios_base::failbit | std::ios_base::badbit);
mpt::IO::WriteRaw(file, mpt::as_span(data));
mpt::IO::Flush(file);
return *this;
}
LazyFileRef & LazyFileRef::operator = (const std::string &data)
{
mpt::ofstream file(m_Filename, std::ios::binary);
file.exceptions(std::ios_base::failbit | std::ios_base::badbit);
mpt::IO::WriteRaw(file, mpt::as_span(data));
mpt::IO::Flush(file);
return *this;
}
LazyFileRef::operator std::vector<std::byte> () const
{
mpt::ifstream file(m_Filename, std::ios::binary);
if(!mpt::IO::IsValid(file))
{
return std::vector<std::byte>();
}
file.exceptions(std::ios_base::failbit | std::ios_base::badbit);
mpt::IO::SeekEnd(file);
std::vector<std::byte> buf(mpt::saturate_cast<std::size_t>(mpt::IO::TellRead(file)));
mpt::IO::SeekBegin(file);
mpt::IO::ReadRaw(file, mpt::as_span(buf));
return buf;
}
LazyFileRef::operator std::vector<char> () const
{
mpt::ifstream file(m_Filename, std::ios::binary);
if(!mpt::IO::IsValid(file))
{
return std::vector<char>();
}
file.exceptions(std::ios_base::failbit | std::ios_base::badbit);
mpt::IO::SeekEnd(file);
std::vector<char> buf(mpt::saturate_cast<std::size_t>(mpt::IO::TellRead(file)));
mpt::IO::SeekBegin(file);
mpt::IO::ReadRaw(file, mpt::as_span(buf));
return buf;
}
LazyFileRef::operator std::string () const
{
mpt::ifstream file(m_Filename, std::ios::binary);
if(!mpt::IO::IsValid(file))
{
return std::string();
}
file.exceptions(std::ios_base::failbit | std::ios_base::badbit);
mpt::IO::SeekEnd(file);
std::vector<char> buf(mpt::saturate_cast<std::size_t>(mpt::IO::TellRead(file)));
mpt::IO::SeekBegin(file);
mpt::IO::ReadRaw(file, mpt::as_span(buf));
return mpt::buffer_cast<std::string>(buf);
}
} // namespace mpt
#endif // MODPLUG_TRACKER
InputFile::InputFile(const mpt::PathString &filename, bool allowWholeFileCaching)
: m_IsValid(false)
, m_IsCached(false)
{
MPT_ASSERT(!filename.empty());
Open(filename, allowWholeFileCaching);
}
InputFile::~InputFile()
{
return;
}
bool InputFile::Open(const mpt::PathString &filename, bool allowWholeFileCaching)
{
m_IsCached = false;
m_Cache.resize(0);
m_Cache.shrink_to_fit();
m_Filename = filename;
m_File.open(m_Filename, std::ios::binary | std::ios::in);
if(allowWholeFileCaching)
{
if(mpt::IO::IsReadSeekable(m_File))
{
if(!mpt::IO::SeekEnd(m_File))
{
m_File.close();
return false;
}
mpt::IO::Offset filesize = mpt::IO::TellRead(m_File);
if(!mpt::IO::SeekBegin(m_File))
{
m_File.close();
return false;
}
if(mpt::in_range<std::size_t>(filesize))
{
std::size_t buffersize = mpt::saturate_cast<std::size_t>(filesize);
m_Cache.resize(buffersize);
if(mpt::IO::ReadRaw(m_File, mpt::as_span(m_Cache)).size() != mpt::saturate_cast<std::size_t>(filesize))
{
m_File.close();
return false;
}
if(!mpt::IO::SeekBegin(m_File))
{
m_File.close();
return false;
}
m_IsCached = true;
m_IsValid = true;
return true;
}
}
}
m_IsValid = true;
return m_File.good();
}
bool InputFile::IsValid() const
{
return m_IsValid && m_File.good();
}
bool InputFile::IsCached() const
{
return m_IsCached;
}
mpt::PathString InputFile::GetFilename() const
{
return m_Filename;
}
std::istream& InputFile::GetStream()
{
MPT_ASSERT(!m_IsCached);
return m_File;
}
mpt::const_byte_span InputFile::GetCache()
{
MPT_ASSERT(m_IsCached);
return mpt::as_span(m_Cache);
}
#if defined(MODPLUG_TRACKER) && MPT_OS_WINDOWS
OnDiskFileWrapper::OnDiskFileWrapper(FileCursor &file, const mpt::PathString &fileNameExtension)
: m_IsTempFile(false)
{
try
{
file.Rewind();
if(!file.GetOptionalFileName())
{
const mpt::PathString tempName = mpt::CreateTempFileName(P_("OpenMPT"), fileNameExtension);
#if MPT_OS_WINDOWS && MPT_OS_WINDOWS_WINRT
#if (_WIN32_WINNT < 0x0602)
#define MPT_ONDISKFILEWRAPPER_NO_CREATEFILE
#endif
#endif
#ifdef MPT_ONDISKFILEWRAPPER_NO_CREATEFILE
mpt::ofstream f(tempName, std::ios::binary);
if(!f)
{
throw std::runtime_error("Error creating temporary file.");
}
while(!file.EndOfFile())
{
FileCursor::PinnedView view = file.ReadPinnedView(mpt::IO::BUFFERSIZE_NORMAL);
std::size_t towrite = view.size();
std::size_t written = 0;
do
{
std::size_t chunkSize = mpt::saturate_cast<std::size_t>(towrite);
bool chunkOk = false;
chunkOk = mpt::IO::WriteRaw(f, mpt::const_byte_span(view.data() + written, chunkSize));
if(!chunkOk)
{
throw std::runtime_error("Incomplete Write.");
}
towrite -= chunkSize;
written += chunkSize;
} while(towrite > 0);
}
f.close();
#else // !MPT_ONDISKFILEWRAPPER_NO_CREATEFILE
HANDLE hFile = NULL;
#if MPT_OS_WINDOWS_WINRT
hFile = mpt::windows::CheckFileHANDLE(CreateFile2(tempName.AsNative().c_str(), GENERIC_WRITE, FILE_SHARE_READ, CREATE_ALWAYS, NULL));
#else
hFile = mpt::windows::CheckFileHANDLE(CreateFile(tempName.AsNative().c_str(), GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY, NULL));
#endif
while(!file.EndOfFile())
{
FileCursor::PinnedView view = file.ReadPinnedView(mpt::IO::BUFFERSIZE_NORMAL);
std::size_t towrite = view.size();
std::size_t written = 0;
do
{
DWORD chunkSize = mpt::saturate_cast<DWORD>(towrite);
DWORD chunkDone = 0;
try
{
mpt::windows::CheckBOOL(WriteFile(hFile, view.data() + written, chunkSize, &chunkDone, NULL));
} catch(...)
{
CloseHandle(hFile);
hFile = NULL;
throw;
}
if(chunkDone != chunkSize)
{
CloseHandle(hFile);
hFile = NULL;
throw std::runtime_error("Incomplete WriteFile().");
}
towrite -= chunkDone;
written += chunkDone;
} while(towrite > 0);
}
CloseHandle(hFile);
hFile = NULL;
#endif // MPT_ONDISKFILEWRAPPER_NO_CREATEFILE
m_Filename = tempName;
m_IsTempFile = true;
} else
{
m_Filename = file.GetOptionalFileName().value();
}
} catch (const std::runtime_error &)
{
m_IsTempFile = false;
m_Filename = mpt::PathString();
}
}
OnDiskFileWrapper::~OnDiskFileWrapper()
{
if(m_IsTempFile)
{
DeleteFile(m_Filename.AsNative().c_str());
m_IsTempFile = false;
}
m_Filename = mpt::PathString();
}
bool OnDiskFileWrapper::IsValid() const
{
return !m_Filename.empty();
}
mpt::PathString OnDiskFileWrapper::GetFilename() const
{
return m_Filename;
}
#endif // MODPLUG_TRACKER && MPT_OS_WINDOWS
#else // !MPT_ENABLE_FILEIO
MPT_MSVC_WORKAROUND_LNK4221(mptFileIO)
#endif // MPT_ENABLE_FILEIO
OPENMPT_NAMESPACE_END