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use std::io::{Cursor, Read};
use crate::error::*;
use crate::handles::*;
use crate::{CryptoCtx, HandleManagers};
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct ArrayOutput(Cursor<Vec<u8>>);
impl ArrayOutput {
fn len(&self) -> usize {
self.0.get_ref().len()
}
fn pull(&self, buf: &mut [u8]) -> Result<usize, CryptoError> {
let data = self.0.get_ref();
let data_len = data.len();
let buf_len = buf.len();
ensure!(buf_len >= data_len, CryptoError::Overflow);
buf.copy_from_slice(data);
Ok(data_len)
}
pub fn new(data: Vec<u8>) -> Self {
ArrayOutput(Cursor::new(data))
}
pub(crate) fn register(handles: &HandleManagers, data: Vec<u8>) -> Result<Handle, CryptoError> {
let array_output = ArrayOutput::new(data);
let handle = handles.array_output.register(array_output)?;
Ok(handle)
}
}
impl Read for ArrayOutput {
fn read(&mut self, buf: &mut [u8]) -> Result<usize, std::io::Error> {
self.0.read(buf)
}
}
impl CryptoCtx {
pub fn array_output_len(&self, array_output_handle: Handle) -> Result<usize, CryptoError> {
let array_output = self.handles.array_output.get(array_output_handle)?;
Ok(array_output.len())
}
pub fn array_output_pull(
&self,
array_output_handle: Handle,
buf: &mut [u8],
) -> Result<usize, CryptoError> {
let array_output = self.handles.array_output.get(array_output_handle)?;
let len = array_output.pull(buf)?;
self.handles.array_output.close(array_output_handle)?;
Ok(len)
}
}