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