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use alloc::{string::String, vec::Vec};
pub struct ByteBuf {
buf: Vec<u8>,
}
impl ByteBuf {
pub fn new(len: usize) -> Result<Self, String> {
let buf = vec![0; len];
Ok(Self { buf })
}
pub fn realloc(&mut self, new_len: usize) -> Result<(), String> {
self.buf.resize(new_len, 0u8);
Ok(())
}
pub fn len(&self) -> usize {
self.buf.len()
}
pub fn as_slice(&self) -> &[u8] {
self.buf.as_ref()
}
pub fn as_slice_mut(&mut self) -> &mut [u8] {
self.buf.as_mut()
}
pub fn erase(&mut self) -> Result<(), String> {
for v in &mut self.buf {
*v = 0;
}
Ok(())
}
}