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"""Minimal '_curses' module, the low-level interface for curses module
which is not meant to be used directly.
Based on ctypes. It's too incomplete to be really called '_curses', so
to use it, you have to import it and stick it in sys.modules['_curses']
manually.
Note that there is also a built-in module _minimal_curses which will
hide this one if compiled in.
"""
import ctypes
import ctypes.util
class error(Exception):
pass
def _find_clib() -> str:
trylibs = ["ncursesw", "ncurses", "curses"]
for lib in trylibs:
path = ctypes.util.find_library(lib)
if path:
return path
raise ModuleNotFoundError("curses library not found", name="pyrepl._minimal_curses")
_clibpath = _find_clib()
clib = ctypes.cdll.LoadLibrary(_clibpath)
clib.setupterm.argtypes = [ctypes.c_char_p, ctypes.c_int, ctypes.POINTER(ctypes.c_int)]
clib.setupterm.restype = ctypes.c_int
clib.tigetstr.argtypes = [ctypes.c_char_p]
clib.tigetstr.restype = ctypes.POINTER(ctypes.c_char)
clib.tparm.argtypes = [ctypes.c_char_p] + 9 * [ctypes.c_int] # type: ignore[operator]
clib.tparm.restype = ctypes.c_char_p
OK = 0
ERR = -1
# ____________________________________________________________
try: from __pypy__ import builtinify
except ImportError: builtinify = lambda f: f
@builtinify
def setupterm(termstr, fd):
err = ctypes.c_int(0)
result = clib.setupterm(termstr, fd, ctypes.byref(err))
if result == ERR:
raise error("setupterm() failed (err=%d)" % err.value)
@builtinify
def tigetstr(cap):
if not isinstance(cap, bytes):
cap = cap.encode("ascii")
result = clib.tigetstr(cap)
if ctypes.cast(result, ctypes.c_void_p).value == ERR:
return None
return ctypes.cast(result, ctypes.c_char_p).value
@builtinify
def tparm(str, i1=0, i2=0, i3=0, i4=0, i5=0, i6=0, i7=0, i8=0, i9=0):
result = clib.tparm(str, i1, i2, i3, i4, i5, i6, i7, i8, i9)
if result is None:
raise error("tparm() returned NULL")
return result
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