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use std::io::{Read, Write};
use crate::{
encoding::*, localized_text::LocalizedText, node_id::NodeId, status_codes::StatusCode,
string::UAString,
};
#[derive(Clone, Debug, PartialEq)]
pub struct Argument {
pub name: UAString,
pub data_type: NodeId,
pub value_rank: i32,
pub array_dimensions: Option<Vec<u32>>,
pub description: LocalizedText,
}
impl BinaryEncoder<Argument> for Argument {
fn byte_len(&self) -> usize {
let mut size = 0;
size += self.name.byte_len();
size += self.data_type.byte_len();
size += self.value_rank.byte_len();
size += byte_len_array(&self.array_dimensions);
size += self.description.byte_len();
size
}
fn encode<S: Write>(&self, stream: &mut S) -> EncodingResult<usize> {
let mut size = 0;
size += self.name.encode(stream)?;
size += self.data_type.encode(stream)?;
size += self.value_rank.encode(stream)?;
if self.value_rank > 0 {
if let Some(ref array_dimensions) = self.array_dimensions {
if self.value_rank as usize != array_dimensions.len() {
error!("The array dimensions {} of the Argument should match value rank {} and they don't", array_dimensions.len(), self.value_rank);
return Err(StatusCode::BadDataEncodingInvalid);
}
size += write_array(stream, &self.array_dimensions)?;
} else {
error!("The array dimensions are expected in the Argument matching value rank {} and they aren't", self.value_rank);
return Err(StatusCode::BadDataEncodingInvalid);
}
} else {
size += write_u32(stream, 0u32)?;
}
size += self.description.encode(stream)?;
Ok(size)
}
fn decode<S: Read>(stream: &mut S, decoding_options: &DecodingOptions) -> EncodingResult<Self> {
let name = UAString::decode(stream, decoding_options)?;
let data_type = NodeId::decode(stream, decoding_options)?;
let value_rank = i32::decode(stream, decoding_options)?;
let array_dimensions: Option<Vec<u32>> = read_array(stream, decoding_options)?;
if let Some(ref array_dimensions) = array_dimensions {
if value_rank > 0 && value_rank as usize != array_dimensions.len() {
error!("The array dimensions {} of the Argument should match value rank {} and they don't", array_dimensions.len(), value_rank);
return Err(StatusCode::BadDataEncodingInvalid);
}
}
let description = LocalizedText::decode(stream, decoding_options)?;
Ok(Argument {
name,
data_type,
value_rank,
array_dimensions,
description,
})
}
}