Function sp_runtime_interface::pack_ptr_and_len

pub fn pack_ptr_and_len(ptr: u32, len: u32) -> u64

Pack a pointer and length into an u64.

Examples found in repository

src/pass_by.rs (line 226)

	fn into_ffi_value(instance: T, context: &mut dyn FunctionContext) -> Result<Self::FFIType> {
		let vec = instance.encode();
		let ptr = context.allocate_memory(vec.len() as u32)?;
		context.write_memory(ptr, &vec)?;

		Ok(pack_ptr_and_len(ptr.into(), vec.len() as u32))
	}

src/impls.rs (line 170)

	fn into_ffi_value(self, context: &mut dyn FunctionContext) -> Result<u64> {
		let vec: Cow<'_, [u8]> = if TypeId::of::<T>() == TypeId::of::<u8>() {
			unsafe { Cow::Borrowed(mem::transmute(&self[..])) }
		} else {
			Cow::Owned(self.encode())
		};

		let ptr = context.allocate_memory(vec.as_ref().len() as u32)?;
		context.write_memory(ptr, &vec)?;

		Ok(pack_ptr_and_len(ptr.into(), vec.len() as u32))
	}