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gh-134210: refactor signal handling in _curses.window.{get_wch,getkey} #134646

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Merged
merged 5 commits into from
May 27, 2025
Merged

gh-134210: refactor signal handling in _curses.window.{get_wch,getkey} #134646

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6b6bd73
refactor signal handling in `_curses.window.{get_wch,get_key}`
picnixz May 25, 2025
d4ac112
remove redundant check
picnixz May 26, 2025
32a77d3
address Victor's review
picnixz May 26, 2025
467883d
Update _cursesmodule.c
picnixz May 26, 2025
f2b32e5
Update _cursesmodule.c
picnixz May 26, 2025
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33 changes: 20 additions & 13 deletions Modules/_cursesmodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1659,6 +1659,21 @@ _curses_window_getbkgd_impl(PyCursesWindowObject *self)
return (long) getbkgd(self->win);
}

static PyObject *
curses_check_signals_on_input_error(PyCursesWindowObject *self,
const char *curses_funcname,
const char *python_funcname)
{
assert(!PyErr_Occurred());
if (!PyErr_CheckSignals()) {
assert(!PyErr_Occurred());
cursesmodule_state *state = get_cursesmodule_state_by_win(self);
PyErr_Format(state->error, "%s() (called by %s()): no input",
curses_funcname, python_funcname);
}
return NULL;
}

/*[clinic input]
_curses.window.getch -> int

Expand Down Expand Up @@ -1731,13 +1746,9 @@ _curses_window_getkey_impl(PyCursesWindowObject *self, int group_right_1,
Py_END_ALLOW_THREADS

if (rtn == ERR) {
/* getch() returns ERR in nodelay mode */
PyErr_CheckSignals();
if (!PyErr_Occurred()) {
cursesmodule_state *state = get_cursesmodule_state_by_win(self);
const char *funcname = group_right_1 ? "mvwgetch" : "wgetch";
PyErr_Format(state->error, "getkey(): %s(): no input", funcname);
}
/* wgetch() returns ERR in nodelay mode */
const char *funcname = group_right_1 ? "mvwgetch" : "wgetch";
curses_check_signals_on_input_error(self, funcname, "getkey");
return NULL;
} else if (rtn <= 255) {
#ifdef NCURSES_VERSION_MAJOR
Expand Down Expand Up @@ -1791,13 +1802,9 @@ _curses_window_get_wch_impl(PyCursesWindowObject *self, int group_right_1,
Py_END_ALLOW_THREADS

if (ct == ERR) {
if (PyErr_CheckSignals())
return NULL;

/* get_wch() returns ERR in nodelay mode */
cursesmodule_state *state = get_cursesmodule_state_by_win(self);
/* wget_wch() returns ERR in nodelay mode */
const char *funcname = group_right_1 ? "mvwget_wch" : "wget_wch";
PyErr_Format(state->error, "get_wch(): %s(): no input", funcname);
curses_check_signals_on_input_error(self, funcname, "get_wch");
return NULL;
}
if (ct == KEY_CODE_YES)
Expand Down
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