public uint GetEntryCount(EntryType entry)
{
Checks.CheckEntryTypeValueIsValidAndThrow(entry);
var entryData = m_Entries[(int)entry];
return(entryData.Count);
}
public ulong GetSizeForEntryRange(EntryType entry, uint offset, uint count)
{
Checks.CheckEntryTypeValueIsValidAndThrow(entry);
var entryData = m_Entries[(int)entry];
Checks.CheckIndexOutOfBoundsAndThrow(offset + count, entryData.Count);
return(entryData.ComputeByteSizeForEntryRange(offset, count, true));
}
unsafe ScheduleResult InternalRead(EntryType entry, uint offset, uint count, void *buffer, int bufferLength)
{
Checks.CheckEntryTypeValueIsValidAndThrow(entry);
var result = new ScheduleResult();
var entryData = m_Entries[(int)entry];
if (entryData.Count < 1)
{
result.error = ReadError.EmptyFormatEntry;
return(result); //guard against reading empty format entries
}
Checks.CheckIndexOutOfBoundsAndThrow(offset, count);
Checks.CheckIndexOutOfBoundsAndThrow((long)entryData.ComputeByteSizeForEntryRange(offset, count, true), bufferLength);
long rangeByteSize = (long)entryData.ComputeByteSizeForEntryRange(offset, count, false);
var bufferPtr = (byte *)buffer;
ReadHandle readHandle = default(ReadHandle);
switch (entryData.Header.Format)
{
case EntryFormat.SingleElement:
readHandle = ScheduleSingleElementEntryReads(entryData, rangeByteSize, bufferPtr);
result.error = ReadError.InProgress;
break;
case EntryFormat.ConstantSizeElementArray:
readHandle = ScheduleConstSizeElementArrayRead(entryData, offset, rangeByteSize, bufferPtr);
result.error = ReadError.InProgress;
break;
case EntryFormat.DynamicSizeElementArray:
bool readHeaderMeta = count + offset == entryData.Count;
long dynamicEntryLengthsArray = (count + 1) * sizeof(long);
//dynamic entries require x bytes in front of the data to store lengths
UnsafeUtility.MemCpy(bufferPtr, entryData.GetAdditionalStoragePtr() + offset, dynamicEntryLengthsArray - (readHeaderMeta? sizeof(long) : 0));
if (readHeaderMeta)
{
var lastOffset = ((long *)bufferPtr) + count;
* lastOffset = (long)entryData.Header.HeaderMeta;
}
//shift the offsets, so that we remove the lengths of the skipped elements
if (offset > 0)
{
var offsetDiff = entryData.GetAdditionalStoragePtr()[offset];
long *offsetsPtr = (long *)bufferPtr;
for (int i = 0; i < count + 1; ++i)
{
var offsetVal = *offsetsPtr;
* offsetsPtr++ = offsetVal - offsetDiff;
}
}
//offset to jump over where we copied the lengths
bufferPtr = bufferPtr + dynamicEntryLengthsArray;
readHandle = ScheduleDynamicSizeElementArrayReads(entryData, offset, count, rangeByteSize, bufferPtr);
result.error = ReadError.InProgress;
break;
default:
result.error = ReadError.InvalidEntryFormat;
break;
}
result.handle = readHandle;
return(result);
}
