[core] fix VHD support

* Also fix various typos

src/drive.c

@@ -724,7 +724,7 @@ BOOL UnmountVolume(HANDLE hDrive)
 	DWORD size;
 
 	if (!DeviceIoControl(hDrive, FSCTL_DISMOUNT_VOLUME, NULL, 0, NULL, 0, &size, NULL)) {
-		uprintf("Could not ummount drive: %s\n", WindowsErrorString());
+		uprintf("Could not unmount drive: %s\n", WindowsErrorString());
 		return FALSE;
 	}
 	return TRUE;
@@ -877,8 +877,7 @@ BOOL CreatePartition(HANDLE hDrive, int partition_style, int file_system, BOOL m
 
 		DriveLayoutEx.PartitionStyle = PARTITION_STYLE_GPT;
 		DriveLayoutEx.PartitionCount = 1;
-		// At the very least, a GPT disk has atv least 34 reserved (512 bytes) blocks at the beginning
-		// and 33 at the end.
+		// At the very least, a GPT disk has 34 reserved blocks (512 bytes) at the beginning and 33 at the end.
 		DriveLayoutEx.Type.Gpt.StartingUsableOffset.QuadPart = 34*512;
 		DriveLayoutEx.Type.Gpt.UsableLength.QuadPart = SelectedDrive.DiskSize - (34+33)*512;
 		DriveLayoutEx.Type.Gpt.MaxPartitionCount = MAX_GPT_PARTITIONS;

src/net.c

@@ -122,7 +122,7 @@ const char* WinInetErrorString(void)
 	case ERROR_INTERNET_INVALID_OPERATION:
 		return "The requested operation is invalid.";
 	case ERROR_INTERNET_OPERATION_CANCELLED:
-		return "The operation was canceled, usually because the handle on which the request was operating was closed before the operation completed.";
+		return "The operation was cancelled, usually because the handle on which the request was operating was closed before the operation completed.";
 	case ERROR_INTERNET_INCORRECT_HANDLE_TYPE:
 		return "The type of handle supplied is incorrect for this operation.";
 	case ERROR_INTERNET_INCORRECT_HANDLE_STATE:

src/parser.c

@@ -787,7 +787,7 @@ void parse_update(char* buf, size_t len)
 
 /*
  * Insert entry 'data' under section 'section' of a config file
- * Section must include the relevant delimitors (eg '[', ']') if needed
+ * Section must include the relevant delimiters (eg '[', ']') if needed
  */
 char* insert_section_data(const char* filename, const char* section, const char* data, BOOL dos2unix)
 {

src/rufus.c

@@ -141,11 +141,11 @@ static int64_t last_iso_blocking_status;
  * 0 means unused (no operation or no progress allocated to it)
  * +n means allocate exactly n bars (n percent of the progress bar)
  * -n means allocate a weighted slot of n from all remaining
- *    bars. Eg if 80 slots remain and the sum of all negative entries
+ *    bars. E.g. if 80 slots remain and the sum of all negative entries
  *    is 10, -4 will allocate 4/10*80 = 32 bars (32%) for OP progress
  */
 static int nb_slots[OP_MAX];
-static float slot_end[OP_MAX+1];	// shifted +1 so that we can substract 1 to OP indexes
+static float slot_end[OP_MAX+1];	// shifted +1 so that we can subtract 1 to OP indexes
 static float previous_end;
 
 // TODO: Remember to update copyright year in both license.h and the RC when the year changes!
@@ -1546,7 +1546,7 @@ static INT_PTR CALLBACK MainCallback(HWND hDlg, UINT message, WPARAM wParam, LPA
 		// since last refresh/arm timer, and have that timer send DBT_CUSTOMEVENT when it expires.
 		// DO *NOT* USE WM_DEVICECHANGE AS THE MESSAGE FROM THE TIMER PROC, as it may be filtered!
 		// For instance filtering will occur when (un)plugging in a FreeBSD UFD on Windows 8.
-		// Intead, use a custom user message, such as UM_MEDIA_CHANGE, to set DBT_CUSTOMEVENT.
+		// Instead, use a custom user message, such as UM_MEDIA_CHANGE, to set DBT_CUSTOMEVENT.
 		if (format_thid == NULL) {
 			switch (wParam) {
 			case DBT_DEVICEARRIVAL:

src/rufus.rc

@@ -32,7 +32,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
 
 IDD_DIALOG DIALOGEX 12, 12, 206, 329
 STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
-CAPTION "Rufus 1.4.8.470"
+CAPTION "Rufus 1.4.8.471"
 FONT 8, "MS Shell Dlg", 400, 0, 0x1
 BEGIN
     DEFPUSHBUTTON   "Start",IDC_START,94,291,50,14
@@ -165,7 +165,7 @@ END
 RTL_IDD_DIALOG DIALOGEX 12, 12, 206, 329
 STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_RTLREADING | WS_EX_APPWINDOW | WS_EX_LAYOUTRTL
-CAPTION "Rufus 1.4.8.470"
+CAPTION "Rufus 1.4.8.471"
 FONT 8, "MS Shell Dlg", 400, 0, 0x1
 BEGIN
     DEFPUSHBUTTON   "Start",IDC_START,94,291,50,14
@@ -427,8 +427,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 1,4,8,470
- PRODUCTVERSION 1,4,8,470
+ FILEVERSION 1,4,8,471
+ PRODUCTVERSION 1,4,8,471
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -445,13 +445,13 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "Akeo Consulting (http://akeo.ie)"
             VALUE "FileDescription", "Rufus"
-            VALUE "FileVersion", "1.4.8.470"
+            VALUE "FileVersion", "1.4.8.471"
             VALUE "InternalName", "Rufus"
             VALUE "LegalCopyright", "© 2011-2014 Pete Batard (GPL v3)"
             VALUE "LegalTrademarks", "http://www.gnu.org/copyleft/gpl.html"
             VALUE "OriginalFilename", "rufus.exe"
             VALUE "ProductName", "Rufus"
-            VALUE "ProductVersion", "1.4.8.470"
+            VALUE "ProductVersion", "1.4.8.471"
         END
     END
     BLOCK "VarFileInfo"

src/usb.c

@@ -199,22 +199,23 @@ BOOL GetUSBDevices(DWORD devnum)
 		if (list_size[s] != 0)
 			full_list_size += list_size[s]-1;	// remove extra NUL terminator
 	}
-	full_list_size += 1;	// add extra NUL terminator
-	if (full_list_size < 2)
-		return FALSE;
-	devid_list = (char*)malloc(full_list_size);
-	if (devid_list == NULL) {
-		uprintf("Could not allocate Device ID list\n");
-		return FALSE;
-	}
-	for (s=0, i=0; s<ARRAYSIZE(storage_name); s++) {
-		if (list_size[s] > 1) {
-			CM_Get_Device_ID_ListA(storage_name[s], &devid_list[i], list_size[s],
-				CM_GETIDLIST_FILTER_SERVICE|CM_GETIDLIST_FILTER_PRESENT);	// 
-			// The list_size is sometimes larger than required thus we need to find the real end
-			for (i += list_size[s]; i > 2; i--) {
-				if ((devid_list[i-2] != '\0') && (devid_list[i-1] == '\0') && (devid_list[i] == '\0'))
-					break;
+	devid_list = NULL;
+	if (full_list_size != 0) {
+		full_list_size += 1;	// add extra NUL terminator
+		devid_list = (char*)malloc(full_list_size);
+		if (devid_list == NULL) {
+			uprintf("Could not allocate Device ID list\n");
+			return FALSE;
+		}
+		for (s=0, i=0; s<ARRAYSIZE(storage_name); s++) {
+			if (list_size[s] > 1) {
+				CM_Get_Device_ID_ListA(storage_name[s], &devid_list[i], list_size[s],
+					CM_GETIDLIST_FILTER_SERVICE|CM_GETIDLIST_FILTER_PRESENT);	// 
+				// The list_size is sometimes larger than required thus we need to find the real end
+				for (i += list_size[s]; i > 2; i--) {
+					if ((devid_list[i-2] != '\0') && (devid_list[i-1] == '\0') && (devid_list[i] == '\0'))
+						break;
+				}
 			}
 		}
 	}
@@ -246,11 +247,11 @@ BOOL GetUSBDevices(DWORD devnum)
 			safe_strcpy(buffer, sizeof(buffer), lmprintf(MSG_045));
 		} else if (safe_strstr(buffer, vhd_name) != NULL) {
 			props.is_VHD = TRUE;
-		} else {
+		} else if (devid_list != NULL) {
 			// Get the properties of the device. We could avoid doing this lookup every time by keeping
 			// a lookup table, but there shouldn't be that many USB storage devices connected...
 			// NB: Each of these Device IDs have an _only_ child, from which we get the Device Instance match.
-			for (device_id = devid_list; *device_id; device_id += strlen(device_id) + 1) {
+			for (device_id = devid_list; *device_id != 0; device_id += strlen(device_id) + 1) {
 				if ( (CM_Locate_DevNodeA(&parent_inst, device_id, 0) == CR_SUCCESS)
 				  && (CM_Get_Child(&device_inst, parent_inst, 0) == CR_SUCCESS)
 				  && (device_inst == dev_info_data.DevInst) ) {

src/vhd.c

@@ -27,6 +27,9 @@
 static BOOL has_wimgapi = FALSE, has_7z = FALSE;
 static char sevenzip_path[MAX_PATH];
 
+// TODO: Add a call to generate a Fixed Hard Disk VHD footer, This would allow the saving of an existing USB to VHD. See VHD specs at:
+// http://download.microsoft.com/download/f/f/e/ffef50a5-07dd-4cf8-aaa3-442c0673a029/Virtual%20Hard%20Disk%20Format%20Spec_10_18_06.doc
+
 // WIM API Prototypes
 #define WIM_GENERIC_READ	GENERIC_READ
 #define WIM_OPEN_EXISTING	OPEN_EXISTING
@@ -46,7 +49,7 @@ static BOOL Get7ZipPath(void)
 	return FALSE;
 }
 
-// Find out if we have any way to extraxt WIM files on this platform
+// Find out if we have any way to extract WIM files on this platform
 BOOL WimExtractCheck(void)
 {
 	PF_INIT(WIMCreateFile, Wimgapi);