mirror of
https://github.com/jart/cosmopolitan.git
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9b29358511
Status lines for Emacs and Vim have been added to Python sources so they'll be easier to edit using Python's preferred coding style. Some DNS helper functions have been broken up into multiple files. It's nice to have one function per file whenever possible, since that way we don't need -ffunction-sections. Another reason it's good to have small source files, is because the build will be enforcing resource limits on compilation and testing soon.
543 lines
15 KiB
C
543 lines
15 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Python 3 │
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│ https://docs.python.org/3/license.html │
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╚─────────────────────────────────────────────────────────────────────────────*/
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/* clang-format off */
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/*
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* Interface to the ncurses panel library
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*
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* Original version by Thomas Gellekum
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*/
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/* Release Number */
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static const char PyCursesVersion[] = "2.1";
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/* Includes */
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#include "third_party/python/Include/Python.h"
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#include "third_party/python/Include/py_curses.h"
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typedef struct {
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PyObject *PyCursesError;
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PyObject *PyCursesPanel_Type;
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} _curses_panelstate;
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#define _curses_panelstate(o) ((_curses_panelstate *)PyModule_GetState(o))
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static int
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_curses_panel_clear(PyObject *m)
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{
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Py_CLEAR(_curses_panelstate(m)->PyCursesError);
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return 0;
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}
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static int
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_curses_panel_traverse(PyObject *m, visitproc visit, void *arg)
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{
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Py_VISIT(_curses_panelstate(m)->PyCursesError);
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return 0;
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}
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static void
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_curses_panel_free(void *m)
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{
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_curses_panel_clear((PyObject *) m);
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}
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static struct PyModuleDef _curses_panelmodule;
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#define _curses_panelstate_global \
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((_curses_panelstate *) PyModule_GetState(PyState_FindModule(&_curses_panelmodule)))
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/* Utility Functions */
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/*
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* Check the return code from a curses function and return None
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* or raise an exception as appropriate.
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*/
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static PyObject *
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PyCursesCheckERR(int code, const char *fname)
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{
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if (code != ERR) {
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Py_INCREF(Py_None);
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return Py_None;
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} else {
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if (fname == NULL) {
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PyErr_SetString(_curses_panelstate_global->PyCursesError, catchall_ERR);
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} else {
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PyErr_Format(_curses_panelstate_global->PyCursesError, "%s() returned ERR", fname);
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}
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return NULL;
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}
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}
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/*****************************************************************************
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The Panel Object
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******************************************************************************/
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/* Definition of the panel object and panel type */
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typedef struct {
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PyObject_HEAD
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PANEL *pan;
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PyCursesWindowObject *wo; /* for reference counts */
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} PyCursesPanelObject;
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#define PyCursesPanel_Check(v) \
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(Py_TYPE(v) == _curses_panelstate_global->PyCursesPanel_Type)
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/* Some helper functions. The problem is that there's always a window
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associated with a panel. To ensure that Python's GC doesn't pull
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this window from under our feet we need to keep track of references
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to the corresponding window object within Python. We can't use
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dupwin(oldwin) to keep a copy of the curses WINDOW because the
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contents of oldwin is copied only once; code like
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win = newwin(...)
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pan = win.panel()
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win.addstr(some_string)
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pan.window().addstr(other_string)
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will fail. */
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/* We keep a linked list of PyCursesPanelObjects, lop. A list should
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suffice, I don't expect more than a handful or at most a few
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dozens of panel objects within a typical program. */
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typedef struct _list_of_panels {
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PyCursesPanelObject *po;
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struct _list_of_panels *next;
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} list_of_panels;
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/* list anchor */
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static list_of_panels *lop;
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/* Insert a new panel object into lop */
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static int
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insert_lop(PyCursesPanelObject *po)
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{
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list_of_panels *new;
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if ((new = (list_of_panels *)PyMem_Malloc(sizeof(list_of_panels))) == NULL) {
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PyErr_NoMemory();
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return -1;
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}
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new->po = po;
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new->next = lop;
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lop = new;
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return 0;
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}
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/* Remove the panel object from lop */
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static void
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remove_lop(PyCursesPanelObject *po)
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{
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list_of_panels *temp, *n;
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temp = lop;
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if (temp->po == po) {
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lop = temp->next;
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PyMem_Free(temp);
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return;
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}
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while (temp->next == NULL || temp->next->po != po) {
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if (temp->next == NULL) {
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PyErr_SetString(PyExc_RuntimeError,
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"remove_lop: can't find Panel Object");
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return;
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}
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temp = temp->next;
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}
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n = temp->next->next;
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PyMem_Free(temp->next);
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temp->next = n;
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return;
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}
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/* Return the panel object that corresponds to pan */
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static PyCursesPanelObject *
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find_po(PANEL *pan)
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{
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list_of_panels *temp;
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for (temp = lop; temp->po->pan != pan; temp = temp->next)
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if (temp->next == NULL) return NULL; /* not found!? */
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return temp->po;
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}
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/* Function Prototype Macros - They are ugly but very, very useful. ;-)
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X - function name
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TYPE - parameter Type
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ERGSTR - format string for construction of the return value
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PARSESTR - format string for argument parsing */
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#define Panel_NoArgNoReturnFunction(X) \
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static PyObject *PyCursesPanel_##X(PyCursesPanelObject *self) \
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{ return PyCursesCheckERR(X(self->pan), # X); }
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#define Panel_NoArgTrueFalseFunction(X) \
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static PyObject *PyCursesPanel_##X(PyCursesPanelObject *self) \
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{ \
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if (X (self->pan) == FALSE) { Py_INCREF(Py_False); return Py_False; } \
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else { Py_INCREF(Py_True); return Py_True; } }
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#define Panel_TwoArgNoReturnFunction(X, TYPE, PARSESTR) \
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static PyObject *PyCursesPanel_##X(PyCursesPanelObject *self, PyObject *args) \
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{ \
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TYPE arg1, arg2; \
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if (!PyArg_ParseTuple(args, PARSESTR, &arg1, &arg2)) return NULL; \
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return PyCursesCheckERR(X(self->pan, arg1, arg2), # X); }
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/* ------------- PANEL routines --------------- */
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Panel_NoArgNoReturnFunction(bottom_panel)
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Panel_NoArgNoReturnFunction(hide_panel)
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Panel_NoArgNoReturnFunction(show_panel)
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Panel_NoArgNoReturnFunction(top_panel)
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Panel_NoArgTrueFalseFunction(panel_hidden)
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Panel_TwoArgNoReturnFunction(move_panel, int, "ii;y,x")
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/* Allocation and deallocation of Panel Objects */
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static PyObject *
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PyCursesPanel_New(PANEL *pan, PyCursesWindowObject *wo)
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{
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PyCursesPanelObject *po;
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po = PyObject_NEW(PyCursesPanelObject,
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(PyTypeObject *)(_curses_panelstate_global)->PyCursesPanel_Type);
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if (po == NULL) return NULL;
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po->pan = pan;
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if (insert_lop(po) < 0) {
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po->wo = NULL;
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Py_DECREF(po);
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return NULL;
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}
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po->wo = wo;
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Py_INCREF(wo);
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return (PyObject *)po;
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}
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static void
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PyCursesPanel_Dealloc(PyCursesPanelObject *po)
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{
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PyObject *obj = (PyObject *) panel_userptr(po->pan);
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if (obj) {
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(void)set_panel_userptr(po->pan, NULL);
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Py_DECREF(obj);
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}
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(void)del_panel(po->pan);
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if (po->wo != NULL) {
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Py_DECREF(po->wo);
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remove_lop(po);
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}
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PyObject_DEL(po);
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}
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/* panel_above(NULL) returns the bottom panel in the stack. To get
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this behaviour we use curses.panel.bottom_panel(). */
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static PyObject *
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PyCursesPanel_above(PyCursesPanelObject *self)
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{
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PANEL *pan;
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PyCursesPanelObject *po;
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pan = panel_above(self->pan);
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if (pan == NULL) { /* valid output, it means the calling panel
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is on top of the stack */
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Py_INCREF(Py_None);
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return Py_None;
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}
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po = find_po(pan);
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if (po == NULL) {
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PyErr_SetString(PyExc_RuntimeError,
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"panel_above: can't find Panel Object");
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return NULL;
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}
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Py_INCREF(po);
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return (PyObject *)po;
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}
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/* panel_below(NULL) returns the top panel in the stack. To get
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this behaviour we use curses.panel.top_panel(). */
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static PyObject *
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PyCursesPanel_below(PyCursesPanelObject *self)
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{
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PANEL *pan;
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PyCursesPanelObject *po;
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pan = panel_below(self->pan);
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if (pan == NULL) { /* valid output, it means the calling panel
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is on the bottom of the stack */
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Py_INCREF(Py_None);
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return Py_None;
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}
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po = find_po(pan);
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if (po == NULL) {
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PyErr_SetString(PyExc_RuntimeError,
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"panel_below: can't find Panel Object");
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return NULL;
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}
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Py_INCREF(po);
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return (PyObject *)po;
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}
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static PyObject *
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PyCursesPanel_window(PyCursesPanelObject *self)
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{
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Py_INCREF(self->wo);
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return (PyObject *)self->wo;
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}
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static PyObject *
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PyCursesPanel_replace_panel(PyCursesPanelObject *self, PyObject *args)
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{
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PyCursesPanelObject *po;
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PyCursesWindowObject *temp;
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int rtn;
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if (PyTuple_Size(args) != 1) {
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PyErr_SetString(PyExc_TypeError, "replace requires one argument");
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return NULL;
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}
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if (!PyArg_ParseTuple(args, "O!;window object",
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&PyCursesWindow_Type, &temp))
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return NULL;
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po = find_po(self->pan);
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if (po == NULL) {
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PyErr_SetString(PyExc_RuntimeError,
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"replace_panel: can't find Panel Object");
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return NULL;
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}
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rtn = replace_panel(self->pan, temp->win);
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if (rtn == ERR) {
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PyErr_SetString(_curses_panelstate_global->PyCursesError, "replace_panel() returned ERR");
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return NULL;
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}
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Py_INCREF(temp);
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Py_SETREF(po->wo, temp);
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Py_INCREF(Py_None);
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return Py_None;
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}
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static PyObject *
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PyCursesPanel_set_panel_userptr(PyCursesPanelObject *self, PyObject *obj)
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{
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PyObject *oldobj;
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int rc;
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PyCursesInitialised;
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Py_INCREF(obj);
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oldobj = (PyObject *) panel_userptr(self->pan);
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rc = set_panel_userptr(self->pan, (void*)obj);
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if (rc == ERR) {
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/* In case of an ncurses error, decref the new object again */
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Py_DECREF(obj);
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}
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Py_XDECREF(oldobj);
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return PyCursesCheckERR(rc, "set_panel_userptr");
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}
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static PyObject *
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PyCursesPanel_userptr(PyCursesPanelObject *self)
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{
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PyObject *obj;
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PyCursesInitialised;
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obj = (PyObject *) panel_userptr(self->pan);
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if (obj == NULL) {
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PyErr_SetString(_curses_panelstate_global->PyCursesError, "no userptr set");
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return NULL;
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}
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Py_INCREF(obj);
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return obj;
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}
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/* Module interface */
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static PyMethodDef PyCursesPanel_Methods[] = {
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{"above", (PyCFunction)PyCursesPanel_above, METH_NOARGS},
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{"below", (PyCFunction)PyCursesPanel_below, METH_NOARGS},
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{"bottom", (PyCFunction)PyCursesPanel_bottom_panel, METH_NOARGS},
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{"hidden", (PyCFunction)PyCursesPanel_panel_hidden, METH_NOARGS},
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{"hide", (PyCFunction)PyCursesPanel_hide_panel, METH_NOARGS},
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{"move", (PyCFunction)PyCursesPanel_move_panel, METH_VARARGS},
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{"replace", (PyCFunction)PyCursesPanel_replace_panel, METH_VARARGS},
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{"set_userptr", (PyCFunction)PyCursesPanel_set_panel_userptr, METH_O},
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{"show", (PyCFunction)PyCursesPanel_show_panel, METH_NOARGS},
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{"top", (PyCFunction)PyCursesPanel_top_panel, METH_NOARGS},
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{"userptr", (PyCFunction)PyCursesPanel_userptr, METH_NOARGS},
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{"window", (PyCFunction)PyCursesPanel_window, METH_NOARGS},
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{NULL, NULL} /* sentinel */
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};
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/* -------------------------------------------------------*/
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static PyType_Slot PyCursesPanel_Type_slots[] = {
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{Py_tp_dealloc, PyCursesPanel_Dealloc},
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{Py_tp_methods, PyCursesPanel_Methods},
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{0, 0},
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};
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static PyType_Spec PyCursesPanel_Type_spec = {
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"_curses_panel.curses panel",
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sizeof(PyCursesPanelObject),
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0,
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Py_TPFLAGS_DEFAULT,
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PyCursesPanel_Type_slots
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};
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/* Wrapper for panel_above(NULL). This function returns the bottom
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panel of the stack, so it's renamed to bottom_panel().
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panel.above() *requires* a panel object in the first place which
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may be undesirable. */
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static PyObject *
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PyCurses_bottom_panel(PyObject *self)
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{
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PANEL *pan;
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PyCursesPanelObject *po;
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PyCursesInitialised;
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pan = panel_above(NULL);
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if (pan == NULL) { /* valid output, it means
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there's no panel at all */
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Py_INCREF(Py_None);
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return Py_None;
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}
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po = find_po(pan);
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if (po == NULL) {
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PyErr_SetString(PyExc_RuntimeError,
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"panel_above: can't find Panel Object");
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return NULL;
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}
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Py_INCREF(po);
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return (PyObject *)po;
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}
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static PyObject *
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PyCurses_new_panel(PyObject *self, PyObject *args)
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{
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PyCursesWindowObject *win;
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PANEL *pan;
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if (!PyArg_ParseTuple(args, "O!", &PyCursesWindow_Type, &win))
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return NULL;
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pan = new_panel(win->win);
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if (pan == NULL) {
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PyErr_SetString(_curses_panelstate_global->PyCursesError, catchall_NULL);
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return NULL;
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}
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return (PyObject *)PyCursesPanel_New(pan, win);
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}
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/* Wrapper for panel_below(NULL). This function returns the top panel
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of the stack, so it's renamed to top_panel(). panel.below()
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*requires* a panel object in the first place which may be
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undesirable. */
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static PyObject *
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PyCurses_top_panel(PyObject *self)
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{
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PANEL *pan;
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PyCursesPanelObject *po;
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PyCursesInitialised;
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pan = panel_below(NULL);
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if (pan == NULL) { /* valid output, it means
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there's no panel at all */
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Py_INCREF(Py_None);
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return Py_None;
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}
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po = find_po(pan);
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if (po == NULL) {
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PyErr_SetString(PyExc_RuntimeError,
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"panel_below: can't find Panel Object");
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return NULL;
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}
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Py_INCREF(po);
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return (PyObject *)po;
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}
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static PyObject *PyCurses_update_panels(PyObject *self)
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{
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PyCursesInitialised;
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update_panels();
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Py_INCREF(Py_None);
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return Py_None;
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}
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/* List of functions defined in the module */
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static PyMethodDef PyCurses_methods[] = {
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{"bottom_panel", (PyCFunction)PyCurses_bottom_panel, METH_NOARGS},
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{"new_panel", (PyCFunction)PyCurses_new_panel, METH_VARARGS},
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{"top_panel", (PyCFunction)PyCurses_top_panel, METH_NOARGS},
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{"update_panels", (PyCFunction)PyCurses_update_panels, METH_NOARGS},
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{NULL, NULL} /* sentinel */
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};
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/* Initialization function for the module */
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static struct PyModuleDef _curses_panelmodule = {
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PyModuleDef_HEAD_INIT,
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"_curses_panel",
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NULL,
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sizeof(_curses_panelstate),
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PyCurses_methods,
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NULL,
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_curses_panel_traverse,
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_curses_panel_clear,
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_curses_panel_free
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};
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PyMODINIT_FUNC
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PyInit__curses_panel(void)
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{
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PyObject *m, *d, *v;
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/* Create the module and add the functions */
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m = PyModule_Create(&_curses_panelmodule);
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if (m == NULL)
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goto fail;
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d = PyModule_GetDict(m);
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|
|
|
/* Initialize object type */
|
|
v = PyType_FromSpec(&PyCursesPanel_Type_spec);
|
|
if (v == NULL)
|
|
goto fail;
|
|
((PyTypeObject *)v)->tp_new = NULL;
|
|
_curses_panelstate(m)->PyCursesPanel_Type = v;
|
|
|
|
import_curses();
|
|
if (PyErr_Occurred())
|
|
goto fail;
|
|
|
|
/* For exception _curses_panel.error */
|
|
_curses_panelstate(m)->PyCursesError = PyErr_NewException("_curses_panel.error", NULL, NULL);
|
|
PyDict_SetItemString(d, "error", _curses_panelstate(m)->PyCursesError);
|
|
|
|
/* Make the version available */
|
|
v = PyUnicode_FromString(PyCursesVersion);
|
|
PyDict_SetItemString(d, "version", v);
|
|
PyDict_SetItemString(d, "__version__", v);
|
|
Py_DECREF(v);
|
|
return m;
|
|
fail:
|
|
Py_XDECREF(m);
|
|
return NULL;
|
|
}
|