update lecture material to move to notebook

[harrypotter-wikipedia-cdsw] / win_unicode_console / readline_hook.py

diff --git a/win_unicode_console/readline_hook.py b/win_unicode_console/readline_hook.py
deleted file mode 100644 (file)
index 7946784..0000000
--- a/win_unicode_console/readline_hook.py
+++ /dev/null
@@ -1,106 +0,0 @@
-
-import sys, traceback
-from ctypes import pythonapi, cdll, c_size_t, c_char_p, c_void_p, cast, CFUNCTYPE, POINTER, addressof
-
-PyMem_Malloc = pythonapi.PyMem_Malloc
-PyMem_Malloc.restype = c_size_t
-PyMem_Malloc.argtypes = [c_size_t]
-
-strncpy = cdll.msvcrt.strncpy
-strncpy.restype = c_char_p
-strncpy.argtypes = [c_char_p, c_char_p, c_size_t]
-
-HOOKFUNC = CFUNCTYPE(c_char_p, c_void_p, c_void_p, c_char_p)
-
-PyOS_ReadlineFunctionPointer = c_void_p.in_dll(pythonapi, "PyOS_ReadlineFunctionPointer")
-
-
-def new_zero_terminated_string(b):
-       p = PyMem_Malloc(len(b) + 1)
-       strncpy(cast(p, c_char_p), b, len(b) + 1)
-       return p
-
-
-class ReadlineHookManager:
-       def __init__(self):
-               self.readline_wrapper_ref = HOOKFUNC(self.readline_wrapper)
-               self.address = c_void_p.from_address(addressof(self.readline_wrapper_ref)).value
-               self.original_address = PyOS_ReadlineFunctionPointer.value
-               self.readline_hook = None
-       
-       def readline_wrapper(self, stdin, stdout, prompt):
-               try:
-                       try:
-                               if sys.stdin.encoding != sys.stdout.encoding:
-                                       raise ValueError("sys.stdin.encoding != sys.stdout.encoding, readline hook doesn't know, which one to use to decode prompt")
-                               
-                       except ValueError:
-                               traceback.print_exc(file=sys.stderr)
-                               try:
-                                       prompt = prompt.decode("utf-8")
-                               except UnicodeDecodeError:
-                                       prompt = ""
-                               
-                       else:
-                               prompt = prompt.decode(sys.stdout.encoding)
-                       
-                       try:
-                               line = self.readline_hook(prompt)
-                       except KeyboardInterrupt:
-                               return 0
-                       else:
-                               return new_zero_terminated_string(line.encode(sys.stdin.encoding))
-                       
-               except:
-                       print("Intenal win_unicode_console error", file=sys.stderr)
-                       traceback.print_exc(file=sys.stderr)
-                       return new_zero_terminated_string(b"\n")
-       
-       def install_hook(self, hook):
-               self.readline_hook = hook
-               PyOS_ReadlineFunctionPointer.value = self.address
-       
-       def restore_original(self):
-               self.readline_hook = None
-               PyOS_ReadlineFunctionPointer.value = self.original_address
-
-
-def readline(prompt):
-       sys.stdout.write(prompt)
-       sys.stdout.flush()
-       return sys.stdin.readline()
-
-
-class PyReadlineManager:
-       def __init__(self):
-               self.original_codepage = pyreadline.unicode_helper.pyreadline_codepage
-       
-       def set_codepage(self, codepage):
-               pyreadline.unicode_helper.pyreadline_codepage = codepage
-       
-       def restore_original(self):
-               self.set_codepage(self.original_codepage)
-
-try:
-       import pyreadline.unicode_helper
-except ImportError:
-       pyreadline = None
-else:
-       pyreadline_manager = PyReadlineManager()
-
-manager = ReadlineHookManager()
-
-
-def enable(*, use_pyreadline=True):
-       if use_pyreadline and pyreadline:
-               pyreadline_manager.set_codepage(sys.stdin.encoding)
-                       # pyreadline assumes that encoding of all sys.stdio objects is the same
-       else:
-               manager.install_hook(readline)
-
-def disable():
-       if pyreadline:
-               pyreadline_manager.restore_original()
-       
-       manager.restore_original()
-