Function write_bytes

crates/wasi/src/p1.rs:1162–1174

(
    memory: &mut GuestMemory<'_>,
    ptr: GuestPtr<u8>,
    buf: &[u8],
)

type Result<T, E = types::Error> = std::result::Result<T, E>;

fn write_bytes(
    memory: &mut GuestMemory<'_>,
    ptr: GuestPtr<u8>,
    buf: &[u8],
) -> Result<GuestPtr<u8>, types::Error> {
    // NOTE: legacy implementation always returns Inval errno

    let len = u32::try_from(buf.len())?;

    memory.copy_from_slice(buf, ptr.as_array(len))?;
    let next = ptr.add(len)?;
    Ok(next)
}

fn write_byte(memory: &mut GuestMemory<'_>, ptr: GuestPtr<u8>, byte: u8) -> Result<GuestPtr<u8>> {
    memory.write(ptr, byte)?;