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"""
This module provides a binary target class which represents a target that is a runnable binary on the host.
"""
import subprocess
from subprocess import Popen
from typing import Optional, Union, List
from public import public
from .serial import SerialTarget
@public
class BinaryTarget(SerialTarget):
"""A binary target that is runnable on the host and communicates using the stdin/stdout streams."""
binary: List[str]
process: Optional[Popen] = None
debug_output: bool
def __init__(self, binary: Union[str, List[str]], debug_output: bool = False, **kwargs):
super().__init__()
if not isinstance(binary, (str, list)):
raise TypeError
if isinstance(binary, str):
binary = [binary]
self.binary = binary
self.debug_output = debug_output
def connect(self):
self.process = Popen(self.binary, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
text=True, bufsize=1)
def write(self, data: bytes) -> None:
if self.process is None:
raise ValueError
if self.debug_output:
print(">>", data.decode())
if self.process.stdin:
self.process.stdin.write(data.decode())
self.process.stdin.flush()
def read(self, num: int = 0, timeout: int = 0) -> bytes:
if self.process is None:
raise ValueError
if self.process.stdout:
if num != 0:
read = self.process.stdout.readline(num)
else:
read = self.process.stdout.readline()
else:
read = bytes() # pragma: no cover
if self.debug_output:
print("<<", read, end="")
return read.encode()
def disconnect(self):
if self.process is None:
return
self.process.stdin.close()
self.process.stdout.close()
self.process.terminate()
self.process.wait()
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