browser-fs 0.1.0

A browser-based filesystem implementation for WebAssembly applications
Documentation 
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use std::io::Result;
use std::pin::Pin;
use std::task::{Context, Poll};

use futures_lite::AsyncWrite;

use crate::external::write_access_handle;

impl AsyncWrite for crate::File {
    fn poll_write(
        mut self: Pin<&mut Self>,
        _cx: &mut Context<'_>,
        buf: &[u8],
    ) -> Poll<Result<usize>> {
        let written = write_access_handle(&self.access, buf, self.offset);
        self.offset += written;
        Poll::Ready(Ok(written as usize))
    }

    fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Result<()>> {
        Poll::Ready(self.access.flush().map_err(crate::from_js_error))
    }

    fn poll_close(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Result<()>> {
        self.access.close();
        Poll::Ready(Ok(()))
    }
}