Accept native Big(U)int64WasmArrays in the C++ code.

For some historical reason, there was no HEAP64 in older versions of
Emscripten, so we expected these arrays to be converted to Float64Arrays.
This is no longer an issue so we just accept Big64Arrays directly.

Author: LTLA

src/hdf5_utils.cpp

@@ -926,9 +926,9 @@ void write_numeric_hdf5_base(Handle_& handle, const std::string& type, std::uint
     } else if (type == "Int32WasmArray") {
         Reader_::write(handle, reinterpret_cast<const std::int32_t*>(data), H5::PredType::NATIVE_INT32);
     } else if (type == "Uint64WasmArray") {
-        Reader_::write(handle, reinterpret_cast<const double*>(data), H5::PredType::NATIVE_UINT64);
+        Reader_::write(handle, reinterpret_cast<const std::uint64_t*>(data), H5::PredType::NATIVE_UINT64);
     } else if (type == "Int64WasmArray") {
-        Reader_::write(handle, reinterpret_cast<const double*>(data), H5::PredType::NATIVE_INT64);
+        Reader_::write(handle, reinterpret_cast<const std::int64_t*>(data), H5::PredType::NATIVE_INT64);
     } else if (type == "Float32WasmArray") {
         Reader_::write(handle, reinterpret_cast<const float*>(data), H5::PredType::NATIVE_FLOAT);
     } else if (type == "Float64WasmArray") {

src/initialize_from_arrays.cpp

@@ -28,9 +28,9 @@ tatami::SomeNumericArray<Type_> create_SomeNumericArray(std::uintptr_t ptr, std:
     } else if (type == "Uint32Array") {
         t = tatami::SomeNumericType::U32;
     } else if (type == "BigInt64Array") {
-        t = tatami::SomeNumericType::F64; // Aliasing these for the time being, as there is no BigInt support in the Wasm heap.
+        t = tatami::SomeNumericType::I64;
     } else if (type == "BigUint64Array") {
-        t = tatami::SomeNumericType::F64; // See above.
+        t = tatami::SomeNumericType::U64;
     } else if (type == "Float32Array") {
         t = tatami::SomeNumericType::F32;
     } else if (type == "Float64Array") {