Attempt at raw drive access for linux / osx, test please :)

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2410 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/Common/Src/DriveUtil.cpp

@@ -16,33 +16,31 @@
 // http://code.google.com/p/dolphin-emu/
 
 #include <string>
-
-#include "Common.h"
 #include "DriveUtil.h"
 
 #ifdef _WIN32
 #include <windows.h>
 #include <winioctl.h>
+#elif defined(__GNUC__)		// TODO: replace these with real linux / os x functinos
+#define GetLogicalDriveStrings(x, y) (int)memcpy(y,"/dev/cdrom\0/dev/cdrom1\0/dev/cdrom2\0/dev/cdrom3\0/dev/cdrom4\0/dev/cdrom5\0/dev/cdrom6\0/dev/cdrom7\0/dev/cdrom8\0/dev/cdrom9\0\0\0", 121);
+#else
+#define GetLogicalDriveStrings(x, y) (int)memcpy(y,"/dev/disk2\0/dev/disk3\0/dev/disk4\0/dev/disk5\0/dev/disk6\0/dev/disk7\0/dev/disk8\0/dev/disk9\0/dev/disk10\0/dev/disk11\0\0\0",114);
 #endif
 
 void GetAllRemovableDrives(std::vector<std::string> *drives) {
 	drives->clear();
-#ifdef _WIN32
 	char drives_string[1024];
 	int max_drive_pos = GetLogicalDriveStrings(1024, drives_string);
+
 	char *p = drives_string;
 	// GetLogicalDriveStrings returns the drives as a a series of null-terminated strings
 	// laid out right after each other in RAM, with a double null at the end.
 	while (*p)
 	{
-		if (GetDriveType(p) == DRIVE_CDROM)  // CD_ROM also applies to DVD. Noone has a plain CDROM without DVD anymore so we should be fine.
+		if (File::IsDisk(p))
 		{
-			drives->push_back(std::string(p).substr(0, 2));
+			drives->push_back(std::string(p));
 		}
 		p += strlen(p) + 1;
 	}
-#else
-	// TODO
-	// stat("/media/cdrom") or whatever etc etc
-#endif
 }

Source/Core/Common/Src/DriveUtil.h

@@ -20,6 +20,8 @@
 
 #include <string>
 #include <vector>
+#include "Common.h"
+#include "FileUtil.h"
 
 // Tools to enumerate drives (HDD, DVD, CD) in a platform-independent manner.
 

Source/Core/Common/Src/FileUtil.cpp

@@ -30,6 +30,9 @@
 #include <dirent.h>
 #include <errno.h>
 #include <stdlib.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <linux/cdrom.h>
 #endif
 
 #include <fstream>
@@ -72,11 +75,33 @@ bool Exists(const char *filename)
 bool IsDisk(const char *filename)
 {
 #ifdef _WIN32
-	std::string copy = filename;
-	if (copy.size() < 4 && copy.c_str()[1] == ':')
+	if (GetDriveType(filename) == DRIVE_CDROM)  // CD_ROM also applies to DVD. Noone has a plain CDROM without DVD anymore so we should be fine.
 		return true;
 #else
-	// TODO: add linux \ osx 
+	struct stat statInfo;
+	if((stat(filename, &statInfo) > -1) && (S_ISCHR(statInfo.st_mode) || S_ISBLK(statInfo.st_mode)))
+	{
+		int fileHandle;
+		// try to open the device
+		fileHandle = open(filename, O_RDONLY | O_NONBLOCK, 0);
+		if (fileHandle >= 0)
+		{
+			cdrom_subchnl cdChannelInfo;
+			cdChannelInfo.cdsc_format = CDROM_MSF;
+			
+			if ((ioctl(fileHandle, CDROMSUBCHNL, &cdChannelInfo) == 0) ||
+				(errno == EIO) || (errno == ENOENT) ||
+				(errno == EINVAL)
+				#ifdef __GNUC__
+				 || (errno == ENOMEDIUM)
+				 #endif
+				 )
+			{
+				return true;
+			}
+			close(fileHandle);
+		}
+	}
 #endif
 	return false;
 }

Source/Core/Common/Src/SConscript

@@ -9,6 +9,7 @@ files = [
 	"ConsoleWindow.cpp",
 	"ColorUtil.cpp",
 	"CPUDetect.cpp",
+	"DriveUtil.cpp",
 	"DynamicLibrary.cpp",
 	"Hash.cpp",
 	"IniFile.cpp",

Source/Core/DiscIO/Src/DriveBlob.cpp

@@ -30,14 +30,10 @@ namespace DiscIO
 
 		hDisc = CreateFile(path, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
 							NULL, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, NULL);
-		if (hDisc == INVALID_HANDLE_VALUE)
+		if (hDisc != INVALID_HANDLE_VALUE)
 		{
-			PanicAlert("Load from DVD backup failed");
-		}
-		else
-		{
-			SectorReader::SetSectorSize(2048);
-		#ifdef _LOCKDRIVE
+			
+		#ifdef _LOCKDRIVE // Do we want to lock the drive?
 			// Lock the compact disc in the CD-ROM drive to prevent accidental
 			// removal while reading from it.
 			pmrLockCDROM.PreventMediaRemoval = TRUE;
@@ -45,14 +41,17 @@ namespace DiscIO
                        &pmrLockCDROM, sizeof(pmrLockCDROM), NULL,
                        0, &dwNotUsed, NULL);
 		#endif
-		}
 #else
 		file_ = fopen(drive, "rb");
-		if (!file_)
-			PanicAlert("Load from DVD backup failed");
-		else
-			SetSectorSize(2048);
+		if (file_)
+		{
 #endif
+			SectorReader::SetSectorSize(2048);
+		}
+		else
+		{		
+			PanicAlert("Load from DVD backup failed or no disc in drive %s",drive);
+		}
 	} // DriveReader::DriveReader
 
 	DriveReader::~DriveReader()
@@ -65,7 +64,10 @@ namespace DiscIO
 			&pmrLockCDROM, sizeof(pmrLockCDROM), NULL,
 			0, &dwNotUsed, NULL);
 	#endif
+		if (hDisc != INVALID_HANDLE_VALUE)
+		{
 			CloseHandle(hDisc);
+		}
 #else
 		fclose(file_);
 #endif	
@@ -104,10 +106,14 @@ namespace DiscIO
 		LONG off_high = (LONG)(offset >> 32);
 		SetFilePointer(hDisc, off_low, &off_high, FILE_BEGIN);
 		if (!ReadFile(hDisc, out_ptr, (DWORD)(m_blocksize * num_blocks), (LPDWORD)&NotUsed, NULL))
+		{
 			PanicAlert("DRE");
+			return false;
+		}
 #else
 		fseek(file_, m_blocksize*block_num, SEEK_SET);
-		fread(out_ptr, 1, m_blocksize * num_blocks, file_);
+		if(fread(out_ptr, 1, m_blocksize * num_blocks, file_) != m_blocksize * num_blocks)
+			return false;
 #endif
 		return true;
 	}

Source/Core/DolphinWX/Src/FrameTools.cpp

@@ -99,15 +99,14 @@ void CFrame::CreateMenu()
 	// file menu
 	wxMenu* fileMenu = new wxMenu;
 	m_pMenuItemOpen = fileMenu->Append(wxID_OPEN, _T("&Open...\tCtrl+O"));
-// not tested on linux/os x
-// works ok on a virtual drive with GC Games, Wii games do not load
-// backups take about 60-90 seconds to load from real cd drive
-#ifdef _WIN32
+
+#if defined(_WIN32) || defined(__GNUC__) // not tested on linux/os x
 	wxMenu *externalDrive = new wxMenu;
 	fileMenu->AppendSubMenu(externalDrive, _T("&Boot from DVD Drive..."));
 	GetAllRemovableDrives(&drives);
-	for (int i = 0; i < drives.size() && i < 24; i++) {
-		externalDrive->Append(IDM_DRIVE1 + i, wxString::Format(_T("%s"), drives.at(i).c_str()));
+	for (int i = 0; i < drives.size() && i < 24; i++) 
+	{
+		externalDrive->Append(IDM_DRIVE1 + i, wxString::FromAscii(drives.at(i).c_str()));
 	}
 #endif
 	fileMenu->AppendSeparator();
@@ -490,6 +489,10 @@ void CFrame::OnPlay(wxCommandEvent& WXUNUSED (event))
 
 void CFrame::OnBootDrive(wxCommandEvent& event)
 {
+#ifdef __GNUC__
+	if (!PanicYesNo("This function has not been tested on Linux, continue?\nPlease report whether it works or not"))
+		return;
+#endif
 	BootManager::BootCore(drives.at(event.GetId()-IDM_DRIVE1).c_str());
 }