"""
Alternate stdout and stderr with much more protection
"""

import sys 

class SafePrintStream:
    def __init__(self, stream):
        self._stream = stream

    def write(self, arg):
        try:
            self._stream.write(arg.encode("ASCII", "backslashreplace"))
        except Exception, e:
            try:
                s = u"{%s}" % repr(arg)
                self._stream.write(s)
            except:
                self._stream.write("TriblerConsole: ERROR printing\n")
                self._stream.write(repr(e))
                self._stream.write("\n")
        
    def flush(self):
        self._stream.flush()

class SafeLinePrintStream:
    def __init__(self, stream):
        self._stream = stream
        self._parts = []

    def write(self, arg):
        self._parts.append(arg.encode("ASCII", "backslashreplace"))
        if arg == "\n":
            self._stream.write("".join(self._parts))
            self._parts = []
        
    def flush(self):
        self._stream.write("".join(self._parts))
        self._parts = []
        self._stream.flush()
        
sys.stderr = SafePrintStream(sys.stderr)
sys.stdout = sys.stderr