Hastlayer-SDK

using ICSharpCode.Decompiler.CSharp.Syntax;
using ICSharpCode.Decompiler.TypeSystem;
using System.Linq;

namespace Hast.Transformer.Helpers;

public static class SimpleMemoryAssignmentHelper
{
    public static bool IsRead4BytesAssignment(AssignmentExpression assignmentExpression) =>
        assignmentExpression.Left.GetActualType()?.IsArray() == true &&
        assignmentExpression.Right.Is<InvocationExpression>(invocation =>
            invocation.IsSimpleMemoryInvocation() &&
            invocation.Target.Is<MemberReferenceExpression>(memberReference => memberReference.MemberName == "Read4Bytes") &&
            // Excluding the batched overload.
            invocation.Arguments.Count == 1);

    public static bool IsBatchedReadAssignment(AssignmentExpression assignmentExpression, out int cellCount)
    {
        var cellCountOut = 0;
        InvocationExpression readInvocation = null;

        var result =
            assignmentExpression.Left.GetActualType()?.IsArray() == true &&
            assignmentExpression.Right.Is(
                invocation => invocation.IsSimpleMemoryInvocation() && invocation.Arguments.Count == 2,
                out readInvocation);

        if (result)
        {
            readInvocation.Arguments.Last()
                .Is<PrimitiveExpression>(primitive => int.TryParse(primitive.Value.ToString(), out cellCountOut));
        }

        cellCount = cellCountOut;
        return result;
    }
}