/// <summary>
/// Copies an array of structs to an array in a blob asset after allocating the necessary memory.
/// </summary>
/// <param name="blobArray">A reference to a BlobArray field in a blob asset.</param>
/// <param name="data">An array containing structs of type <typeparamref name="T"/>.</param>
/// <typeparam name="T">The struct data type.</typeparam>
/// <returns>A reference to the newly constructed array as a mutable BlobBuilderArray instance.</returns>
public BlobBuilderArray <T> Construct <T>(ref BlobArray <T> blobArray, params T[] data) where T : struct
{
var constructBlobArray = Allocate(ref blobArray, data.Length);
for (int i = 0; i != data.Length; i++)
{
constructBlobArray[i] = data[i];
}
return(constructBlobArray);
}
/// <summary>
/// Allocates enough memory to store <paramref name="length"/> elements of struct <typeparamref name="T"/>.
/// </summary>
/// <param name="ptr">A reference to a BlobArray field in a blob asset.</param>
/// <param name="length">The number of elements to allocate.</param>
/// <typeparam name="T">The struct data type.</typeparam>
/// <returns>A reference to the newly allocated array as a mutable BlobBuilderArray instance.</returns>
public BlobBuilderArray <T> Allocate <T>(ref BlobArray <T> ptr, int length) where T : struct
{
if (length <= 0)
{
return(new BlobBuilderArray <T>(null, 0));
}
var offsetPtr = (int *)UnsafeUtility.AddressOf(ref ptr.m_OffsetPtr);
ValidateAllocation(offsetPtr);
var allocation = Allocate(UnsafeUtility.SizeOf <T>() * length, UnsafeUtility.AlignOf <T>());
var patch = new OffsetPtrPatch
{
offsetPtr = offsetPtr,
target = allocation,
length = length
};
m_patches.Add(patch);
return(new BlobBuilderArray <T>(AllocationToPointer(allocation), length));
}
public BlobBuilderArray <T> Allocate <T>(int length, ref BlobArray <T> ptr) where T : struct
{
if (length <= 0)
{
throw new ArgumentException("BlobArray length must be greater than 0");
}
var offsetPtr = (int *)UnsafeUtility.AddressOf(ref ptr.m_OffsetPtr);
ValidateAllocation(offsetPtr, "The BlobArray passed to Allocate was not allocated by this BlobBuilder");
var allocation = Allocate(UnsafeUtility.SizeOf <T>() * length, UnsafeUtility.AlignOf <T>());
var patch = new OffsetPtrPatch
{
offsetPtr = offsetPtr,
target = allocation,
length = length
};
m_patches.Add(patch);
return(new BlobBuilderArray <T>(AllocationToPointer(allocation), length));
}
public void Allocate <T>(int length, ref BlobArray <T> ptr) where T : struct
{
ptr.m_OffsetPtr = Allocate(UnsafeUtility.SizeOf <T>() * length, UnsafeUtility.AddressOf(ref ptr));
ptr.m_Length = length;
}
public BlobBuilderArray <T> Allocate <T>(int length, ref BlobArray <T> ptr) where T : struct
{
return(Allocate <T>(ref ptr, length));
}
public BlobBuilderArray <T> Allocate <T>(int length, ref BlobArray <T> ptr) where T : struct => Allocate(ref ptr, length);