1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
use move_binary_format::errors::PartialVMResult;
use move_core_types::vm_status::sub_status::NFE_BCS_SERIALIZATION_FAILURE;
use move_vm_runtime::native_functions::NativeContext;
use move_vm_types::{
gas_schedule::NativeCostIndex,
loaded_data::runtime_types::Type,
natives::function::{native_gas, NativeResult},
pop_arg,
values::{values_impl::Reference, Value},
};
use smallvec::smallvec;
use std::collections::VecDeque;
pub fn native_to_bytes(
context: &mut NativeContext,
mut ty_args: Vec<Type>,
mut args: VecDeque<Value>,
) -> PartialVMResult<NativeResult> {
debug_assert!(ty_args.len() == 1);
debug_assert!(args.len() == 1);
let ref_to_val = pop_arg!(args, Reference);
let arg_type = ty_args.pop().unwrap();
let serialized_value_opt = match context.type_to_type_layout(&arg_type)? {
None => None,
Some(layout) => ref_to_val.read_ref()?.simple_serialize(&layout),
};
let serialized_value = match serialized_value_opt {
None => {
let cost = native_gas(context.cost_table(), NativeCostIndex::BCS_TO_BYTES, 1);
return Ok(NativeResult::err(cost, NFE_BCS_SERIALIZATION_FAILURE));
}
Some(serialized_value) => serialized_value,
};
let cost = native_gas(
context.cost_table(),
NativeCostIndex::BCS_TO_BYTES,
serialized_value.len(),
);
Ok(NativeResult::ok(
cost,
smallvec![Value::vector_u8(serialized_value)],
))
}