forked from dolphin-emu/dolphin
139 lines
3.6 KiB
C++
139 lines
3.6 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <cstdio>
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#include <cstring>
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#include <string>
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#include "Common/CommonTypes.h"
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#include "Common/FileUtil.h"
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#include "DiscIO/Blob.h"
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#include "DiscIO/DriveBlob.h"
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#ifdef _WIN32
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#include "Common/StringUtil.h"
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#endif
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namespace DiscIO
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{
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DriveReader::DriveReader(const std::string& drive)
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{
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#ifdef _WIN32
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SectorReader::SetSectorSize(2048);
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auto const path = UTF8ToTStr(std::string("\\\\.\\") + drive);
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m_disc_handle = CreateFile(path.c_str(), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
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nullptr, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, nullptr);
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if (m_disc_handle != INVALID_HANDLE_VALUE)
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{
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// Do a test read to make sure everything is OK, since it seems you can get
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// handles to empty drives.
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DWORD not_used;
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u8 *buffer = new u8[m_blocksize];
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if (!ReadFile(m_disc_handle, buffer, m_blocksize, (LPDWORD)¬_used, nullptr))
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{
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delete [] buffer;
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// OK, something is wrong.
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CloseHandle(m_disc_handle);
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m_disc_handle = INVALID_HANDLE_VALUE;
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return;
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}
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delete [] buffer;
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#ifdef _LOCKDRIVE // Do we want to lock the drive?
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// Lock the compact disc in the CD-ROM drive to prevent accidental
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// removal while reading from it.
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m_lock_cdrom.PreventMediaRemoval = TRUE;
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DeviceIoControl(m_disc_handle, IOCTL_CDROM_MEDIA_REMOVAL,
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&m_lock_cdrom, sizeof(m_lock_cdrom), nullptr,
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0, &dwNotUsed, nullptr);
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#endif
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#else
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SectorReader::SetSectorSize(2048);
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m_file.Open(drive, "rb");
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if (m_file)
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{
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#endif
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}
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else
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{
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NOTICE_LOG(DISCIO, "Load from DVD backup failed or no disc in drive %s", drive.c_str());
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}
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}
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DriveReader::~DriveReader()
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{
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#ifdef _WIN32
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#ifdef _LOCKDRIVE // Do we want to lock the drive?
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// Unlock the disc in the CD-ROM drive.
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m_lock_cdrom.PreventMediaRemoval = FALSE;
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DeviceIoControl (m_disc_handle, IOCTL_CDROM_MEDIA_REMOVAL,
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&m_lock_cdrom, sizeof(m_lock_cdrom), nullptr,
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0, &dwNotUsed, nullptr);
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#endif
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if (m_disc_handle != INVALID_HANDLE_VALUE)
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{
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CloseHandle(m_disc_handle);
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m_disc_handle = INVALID_HANDLE_VALUE;
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}
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#else
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m_file.Close();
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#endif
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}
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DriveReader* DriveReader::Create(const std::string& drive)
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{
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DriveReader* reader = new DriveReader(drive);
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if (!reader->IsOK())
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{
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delete reader;
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return nullptr;
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}
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return reader;
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}
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void DriveReader::GetBlock(u64 block_num, u8* out_ptr)
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{
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u8* const lpSector = new u8[m_blocksize];
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#ifdef _WIN32
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u32 NotUsed;
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u64 offset = m_blocksize * block_num;
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LONG off_low = (LONG)offset & 0xFFFFFFFF;
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LONG off_high = (LONG)(offset >> 32);
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SetFilePointer(m_disc_handle, off_low, &off_high, FILE_BEGIN);
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if (!ReadFile(m_disc_handle, lpSector, m_blocksize, (LPDWORD)&NotUsed, nullptr))
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PanicAlertT("Disc Read Error");
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#else
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m_file.Seek(m_blocksize * block_num, SEEK_SET);
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m_file.ReadBytes(lpSector, m_blocksize);
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#endif
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memcpy(out_ptr, lpSector, m_blocksize);
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delete[] lpSector;
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}
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bool DriveReader::ReadMultipleAlignedBlocks(u64 block_num, u64 num_blocks, u8* out_ptr)
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{
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#ifdef _WIN32
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u32 NotUsed;
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u64 offset = m_blocksize * block_num;
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LONG off_low = (LONG)offset & 0xFFFFFFFF;
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LONG off_high = (LONG)(offset >> 32);
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SetFilePointer(m_disc_handle, off_low, &off_high, FILE_BEGIN);
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if (!ReadFile(m_disc_handle, out_ptr, (DWORD)(m_blocksize * num_blocks), (LPDWORD)&NotUsed, nullptr))
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{
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PanicAlertT("Disc Read Error");
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return false;
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}
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#else
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fseeko(m_file.GetHandle(), (m_blocksize * block_num), SEEK_SET);
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if (fread(out_ptr, 1, (m_blocksize * num_blocks), m_file.GetHandle()) != (m_blocksize * num_blocks))
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return false;
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#endif
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return true;
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}
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} // namespace
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