/// <summary>
/// Get string from descriptor
/// </summary>
/// <param name="languageID">Language ID</param>
/// <param name="entryIndex">Index</param>
/// <returns></returns>
public unsafe string GetString(ushort languageID, uint entryIndex)
{
/**
* Get length
*/
byte[] buf = new byte[1];
if (!Request(TYPE_DEVICETOHOST, REQ_GET_DESCRIPTOR, (ushort)((DESC_STRING << 8) | entryIndex), languageID, 1, (byte *)Util.ObjectToVoidPtr(buf)))
{
return(null);
}
int len = *(byte *)Util.ObjectToVoidPtr(buf);
/**
* Load full object
*/
byte[] buffer = new byte[len];
if (!Request(TYPE_DEVICETOHOST, REQ_GET_DESCRIPTOR, (ushort)((DESC_STRING << 8) | entryIndex), languageID, (ushort)(len), (byte *)Util.ObjectToVoidPtr(buffer)))
{
return(null);
}
if (len == 0)
{
return("");
}
/**
* Set string
*/
USBStringDescriptor *ptr = (USBStringDescriptor *)Util.ObjectToVoidPtr(buffer);
char *entryData = (char *)ptr + 2;
int size = (len - sizeof(USBStringDescriptor)) / 2;
char *str = (char *)Heap.Alloc(size);
int i = 0;
for (; i < size; i++)
{
str[i] = entryData[i * 2];
}
str[i] = (char)0x00;
/**
* Free unused shizzle
*/
Heap.Free(buffer);
Heap.Free(buf);
return(Util.CharPtrToString(str));
}
/// <summary>
/// Load all languages
/// </summary>
/// <returns></returns>
public unsafe bool LoadLanguages()
{
/**
* Read length
*/
byte[] buf = new byte[1];
if (!Request(TYPE_DEVICETOHOST, REQ_GET_DESCRIPTOR, (DESC_STRING << 8) | 0, 0, 1, (byte *)Util.ObjectToVoidPtr(buf)))
{
return(false);
}
int len = *(byte *)Util.ObjectToVoidPtr(buf);
/**
* Read full table
*/
byte[] buffer = new byte[len];
if (!Request(TYPE_DEVICETOHOST, REQ_GET_DESCRIPTOR, (DESC_STRING << 8) | 0, 0, (ushort)(len), (byte *)Util.ObjectToVoidPtr(buffer)))
{
return(false);
}
USBStringDescriptor *ptr = (USBStringDescriptor *)Util.ObjectToVoidPtr(buffer);
ushort *entryData = (ushort *)ptr + 1;
int entries = (ptr->Length - sizeof(USBStringDescriptor)) / 2;
/**
* Set entries
*/
Languages = new ushort[entries];
NumLanguages = entries;
for (int i = 0; i < entries; i++)
{
Languages[i] = *(entryData + i);
}
/**
* Free unused shizzle
*/
Heap.Free(buf);
Heap.Free(buffer);
return(true);
}
