Method readall

crates/vm/src/stdlib/_io.rs:673–707

(instance: PyObjectRef, vm: &VirtualMachine)

        #[pymethod]
        fn readall(instance: PyObjectRef, vm: &VirtualMachine) -> PyResult<Option<Vec<u8>>> {
            let mut chunks = Vec::new();
            let mut total_len = 0;
            loop {
                // Loop with EINTR handling (PEP 475)
                let data = loop {
                    let res = vm.call_method(&instance, "read", (DEFAULT_BUFFER_SIZE,));
                    match trap_eintr(res, vm)? {
                        Some(val) => break val,
                        None => continue,
                    }
                };
                let data = <Option<PyBytesRef>>::try_from_object(vm, data)?;
                match data {
                    None => {
                        if chunks.is_empty() {
                            return Ok(None);
                        }
                        break;
                    }
                    Some(b) => {
                        if b.as_bytes().is_empty() {
                            break;
                        }
                        total_len += b.as_bytes().len();
                        chunks.push(b)
                    }
                }
            }
            let mut ret = Vec::with_capacity(total_len);
            for b in chunks {
                ret.extend_from_slice(b.as_bytes())
            }
            Ok(Some(ret))
        }

        #[pymethod]
        fn readinto(_instance: PyObjectRef, _args: FuncArgs, vm: &VirtualMachine) -> PyResult {