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if_py_both.h
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if_py_both.h
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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* Python extensions by Paul Moore, David Leonard, Roland Puntaier.
*
* Common code for if_python.c and if_python3.c.
*/
#if PY_VERSION_HEX < 0x02050000
typedef int Py_ssize_t; /* Python 2.4 and earlier don't have this type. */
#endif
#ifdef FEAT_MBYTE
# define ENC_OPT p_enc
#else
# define ENC_OPT "latin1"
#endif
/*
* obtain a lock on the Vim data structures
*/
static void
Python_Lock_Vim(void)
{
}
/*
* release a lock on the Vim data structures
*/
static void
Python_Release_Vim(void)
{
}
/* Output object definition
*/
static PyObject *OutputWrite(PyObject *, PyObject *);
static PyObject *OutputWritelines(PyObject *, PyObject *);
static PyObject *OutputFlush(PyObject *, PyObject *);
/* Function to write a line, points to either msg() or emsg(). */
typedef void (*writefn)(char_u *);
static void writer(writefn fn, char_u *str, PyInt n);
typedef struct
{
PyObject_HEAD
long softspace;
long error;
} OutputObject;
static struct PyMethodDef OutputMethods[] = {
/* name, function, calling, documentation */
{"write", OutputWrite, 1, ""},
{"writelines", OutputWritelines, 1, ""},
{"flush", OutputFlush, 1, ""},
{ NULL, NULL, 0, NULL}
};
#define PyErr_SetVim(str) PyErr_SetString(VimError, str)
/*************/
/* Output buffer management
*/
static PyObject *
OutputWrite(PyObject *self, PyObject *args)
{
int len;
char *str = NULL;
int error = ((OutputObject *)(self))->error;
if (!PyArg_ParseTuple(args, "et#", ENC_OPT, &str, &len))
return NULL;
/* TODO: This works around a gcc optimizer problem and avoids Vim
* from crashing. Should find a real solution. */
if (str == NULL)
return NULL;
Py_BEGIN_ALLOW_THREADS
Python_Lock_Vim();
writer((writefn)(error ? emsg : msg), (char_u *)str, len);
Python_Release_Vim();
Py_END_ALLOW_THREADS
PyMem_Free(str);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
OutputWritelines(PyObject *self, PyObject *args)
{
PyInt n;
PyInt i;
PyObject *list;
int error = ((OutputObject *)(self))->error;
if (!PyArg_ParseTuple(args, "O", &list))
return NULL;
Py_INCREF(list);
if (!PyList_Check(list))
{
PyErr_SetString(PyExc_TypeError, _("writelines() requires list of strings"));
Py_DECREF(list);
return NULL;
}
n = PyList_Size(list);
for (i = 0; i < n; ++i)
{
PyObject *line = PyList_GetItem(list, i);
char *str = NULL;
PyInt len;
if (!PyArg_Parse(line, "et#", ENC_OPT, &str, &len))
{
PyErr_SetString(PyExc_TypeError, _("writelines() requires list of strings"));
Py_DECREF(list);
return NULL;
}
Py_BEGIN_ALLOW_THREADS
Python_Lock_Vim();
writer((writefn)(error ? emsg : msg), (char_u *)str, len);
Python_Release_Vim();
Py_END_ALLOW_THREADS
PyMem_Free(str);
}
Py_DECREF(list);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
OutputFlush(PyObject *self UNUSED, PyObject *args UNUSED)
{
/* do nothing */
Py_INCREF(Py_None);
return Py_None;
}
/* Buffer IO, we write one whole line at a time. */
static garray_T io_ga = {0, 0, 1, 80, NULL};
static writefn old_fn = NULL;
static void
PythonIO_Flush(void)
{
if (old_fn != NULL && io_ga.ga_len > 0)
{
((char_u *)io_ga.ga_data)[io_ga.ga_len] = NUL;
old_fn((char_u *)io_ga.ga_data);
}
io_ga.ga_len = 0;
}
static void
writer(writefn fn, char_u *str, PyInt n)
{
char_u *ptr;
/* Flush when switching output function. */
if (fn != old_fn)
PythonIO_Flush();
old_fn = fn;
/* Write each NL separated line. Text after the last NL is kept for
* writing later. */
while (n > 0 && (ptr = memchr(str, '\n', n)) != NULL)
{
PyInt len = ptr - str;
if (ga_grow(&io_ga, (int)(len + 1)) == FAIL)
break;
mch_memmove(((char *)io_ga.ga_data) + io_ga.ga_len, str, (size_t)len);
((char *)io_ga.ga_data)[io_ga.ga_len + len] = NUL;
fn((char_u *)io_ga.ga_data);
str = ptr + 1;
n -= len + 1;
io_ga.ga_len = 0;
}
/* Put the remaining text into io_ga for later printing. */
if (n > 0 && ga_grow(&io_ga, (int)(n + 1)) == OK)
{
mch_memmove(((char *)io_ga.ga_data) + io_ga.ga_len, str, (size_t)n);
io_ga.ga_len += (int)n;
}
}
/***************/
static PyTypeObject OutputType;
static OutputObject Output =
{
PyObject_HEAD_INIT(&OutputType)
0,
0
};
static OutputObject Error =
{
PyObject_HEAD_INIT(&OutputType)
0,
1
};
static int
PythonIO_Init_io(void)
{
PySys_SetObject("stdout", (PyObject *)(void *)&Output);
PySys_SetObject("stderr", (PyObject *)(void *)&Error);
if (PyErr_Occurred())
{
EMSG(_("E264: Python: Error initialising I/O objects"));
return -1;
}
return 0;
}
static PyObject *VimError;
/* Check to see whether a Vim error has been reported, or a keyboard
* interrupt has been detected.
*/
static int
VimErrorCheck(void)
{
if (got_int)
{
PyErr_SetNone(PyExc_KeyboardInterrupt);
return 1;
}
else if (did_emsg && !PyErr_Occurred())
{
PyErr_SetNone(VimError);
return 1;
}
return 0;
}
/* Vim module - Implementation
*/
static PyObject *
VimCommand(PyObject *self UNUSED, PyObject *args)
{
char *cmd;
PyObject *result;
if (!PyArg_ParseTuple(args, "s", &cmd))
return NULL;
PyErr_Clear();
Py_BEGIN_ALLOW_THREADS
Python_Lock_Vim();
do_cmdline_cmd((char_u *)cmd);
update_screen(VALID);
Python_Release_Vim();
Py_END_ALLOW_THREADS
if (VimErrorCheck())
result = NULL;
else
result = Py_None;
Py_XINCREF(result);
return result;
}
#ifdef FEAT_EVAL
/*
* Function to translate a typval_T into a PyObject; this will recursively
* translate lists/dictionaries into their Python equivalents.
*
* The depth parameter is to avoid infinite recursion, set it to 1 when
* you call VimToPython.
*/
static PyObject *
VimToPython(typval_T *our_tv, int depth, PyObject *lookupDict)
{
PyObject *result;
PyObject *newObj;
char ptrBuf[sizeof(void *) * 2 + 3];
/* Avoid infinite recursion */
if (depth > 100)
{
Py_INCREF(Py_None);
result = Py_None;
return result;
}
/* Check if we run into a recursive loop. The item must be in lookupDict
* then and we can use it again. */
if ((our_tv->v_type == VAR_LIST && our_tv->vval.v_list != NULL)
|| (our_tv->v_type == VAR_DICT && our_tv->vval.v_dict != NULL))
{
sprintf(ptrBuf, "%p",
our_tv->v_type == VAR_LIST ? (void *)our_tv->vval.v_list
: (void *)our_tv->vval.v_dict);
result = PyDict_GetItemString(lookupDict, ptrBuf);
if (result != NULL)
{
Py_INCREF(result);
return result;
}
}
if (our_tv->v_type == VAR_STRING)
{
result = Py_BuildValue("s", our_tv->vval.v_string);
}
else if (our_tv->v_type == VAR_NUMBER)
{
char buf[NUMBUFLEN];
/* For backwards compatibility numbers are stored as strings. */
sprintf(buf, "%ld", (long)our_tv->vval.v_number);
result = Py_BuildValue("s", buf);
}
# ifdef FEAT_FLOAT
else if (our_tv->v_type == VAR_FLOAT)
{
char buf[NUMBUFLEN];
sprintf(buf, "%f", our_tv->vval.v_float);
result = Py_BuildValue("s", buf);
}
# endif
else if (our_tv->v_type == VAR_LIST)
{
list_T *list = our_tv->vval.v_list;
listitem_T *curr;
result = PyList_New(0);
if (list != NULL)
{
PyDict_SetItemString(lookupDict, ptrBuf, result);
for (curr = list->lv_first; curr != NULL; curr = curr->li_next)
{
newObj = VimToPython(&curr->li_tv, depth + 1, lookupDict);
PyList_Append(result, newObj);
Py_DECREF(newObj);
}
}
}
else if (our_tv->v_type == VAR_DICT)
{
result = PyDict_New();
if (our_tv->vval.v_dict != NULL)
{
hashtab_T *ht = &our_tv->vval.v_dict->dv_hashtab;
long_u todo = ht->ht_used;
hashitem_T *hi;
dictitem_T *di;
PyDict_SetItemString(lookupDict, ptrBuf, result);
for (hi = ht->ht_array; todo > 0; ++hi)
{
if (!HASHITEM_EMPTY(hi))
{
--todo;
di = dict_lookup(hi);
newObj = VimToPython(&di->di_tv, depth + 1, lookupDict);
PyDict_SetItemString(result, (char *)hi->hi_key, newObj);
Py_DECREF(newObj);
}
}
}
}
else
{
Py_INCREF(Py_None);
result = Py_None;
}
return result;
}
#endif
static PyObject *
VimEval(PyObject *self UNUSED, PyObject *args UNUSED)
{
#ifdef FEAT_EVAL
char *expr;
typval_T *our_tv;
PyObject *result;
PyObject *lookup_dict;
if (!PyArg_ParseTuple(args, "s", &expr))
return NULL;
Py_BEGIN_ALLOW_THREADS
Python_Lock_Vim();
our_tv = eval_expr((char_u *)expr, NULL);
Python_Release_Vim();
Py_END_ALLOW_THREADS
if (our_tv == NULL)
{
PyErr_SetVim(_("invalid expression"));
return NULL;
}
/* Convert the Vim type into a Python type. Create a dictionary that's
* used to check for recursive loops. */
lookup_dict = PyDict_New();
result = VimToPython(our_tv, 1, lookup_dict);
Py_DECREF(lookup_dict);
Py_BEGIN_ALLOW_THREADS
Python_Lock_Vim();
free_tv(our_tv);
Python_Release_Vim();
Py_END_ALLOW_THREADS
return result;
#else
PyErr_SetVim(_("expressions disabled at compile time"));
return NULL;
#endif
}
static PyObject *ConvertToPyObject(typval_T *);
static PyObject *
VimEvalPy(PyObject *self UNUSED, PyObject *args UNUSED)
{
#ifdef FEAT_EVAL
char *expr;
typval_T *our_tv;
PyObject *result;
if (!PyArg_ParseTuple(args, "s", &expr))
return NULL;
Py_BEGIN_ALLOW_THREADS
Python_Lock_Vim();
our_tv = eval_expr((char_u *)expr, NULL);
Python_Release_Vim();
Py_END_ALLOW_THREADS
if (our_tv == NULL)
{
PyErr_SetVim(_("invalid expression"));
return NULL;
}
result = ConvertToPyObject(our_tv);
Py_BEGIN_ALLOW_THREADS
Python_Lock_Vim();
free_tv(our_tv);
Python_Release_Vim();
Py_END_ALLOW_THREADS
return result;
#else
PyErr_SetVim(_("expressions disabled at compile time"));
return NULL;
#endif
}
static PyObject *
VimStrwidth(PyObject *self UNUSED, PyObject *args)
{
char *expr;
if (!PyArg_ParseTuple(args, "s", &expr))
return NULL;
return PyLong_FromLong(mb_string2cells((char_u *)expr, (int)STRLEN(expr)));
}
/*
* Vim module - Definitions
*/
static struct PyMethodDef VimMethods[] = {
/* name, function, calling, documentation */
{"command", VimCommand, 1, "Execute a Vim ex-mode command" },
{"eval", VimEval, 1, "Evaluate an expression using Vim evaluator" },
{"bindeval", VimEvalPy, 1, "Like eval(), but returns objects attached to vim ones"},
{"strwidth", VimStrwidth, 1, "Screen string width, counts <Tab> as having width 1"},
{ NULL, NULL, 0, NULL }
};
typedef struct
{
PyObject_HEAD
buf_T *buf;
} BufferObject;
#define INVALID_BUFFER_VALUE ((buf_T *)(-1))
/*
* Buffer list object - Implementation
*/
static PyInt
BufListLength(PyObject *self UNUSED)
{
buf_T *b = firstbuf;
PyInt n = 0;
while (b)
{
++n;
b = b->b_next;
}
return n;
}
static PyObject *
BufListItem(PyObject *self UNUSED, PyInt n)
{
buf_T *b;
for (b = firstbuf; b; b = b->b_next, --n)
{
if (n == 0)
return BufferNew(b);
}
PyErr_SetString(PyExc_IndexError, _("no such buffer"));
return NULL;
}
typedef struct
{
PyObject_HEAD
win_T *win;
} WindowObject;
static int ConvertFromPyObject(PyObject *, typval_T *);
static int _ConvertFromPyObject(PyObject *, typval_T *, PyObject *);
typedef struct pylinkedlist_S {
struct pylinkedlist_S *pll_next;
struct pylinkedlist_S *pll_prev;
PyObject *pll_obj;
} pylinkedlist_T;
static pylinkedlist_T *lastdict = NULL;
static pylinkedlist_T *lastlist = NULL;
static void
pyll_remove(pylinkedlist_T *ref, pylinkedlist_T **last)
{
if (ref->pll_prev == NULL)
{
if (ref->pll_next == NULL)
{
*last = NULL;
return;
}
}
else
ref->pll_prev->pll_next = ref->pll_next;
if (ref->pll_next == NULL)
*last = ref->pll_prev;
else
ref->pll_next->pll_prev = ref->pll_prev;
}
static void
pyll_add(PyObject *self, pylinkedlist_T *ref, pylinkedlist_T **last)
{
if (*last == NULL)
ref->pll_prev = NULL;
else
{
(*last)->pll_next = ref;
ref->pll_prev = *last;
}
ref->pll_next = NULL;
ref->pll_obj = self;
*last = ref;
}
static PyTypeObject DictionaryType;
typedef struct
{
PyObject_HEAD
dict_T *dict;
pylinkedlist_T ref;
} DictionaryObject;
static PyObject *
DictionaryNew(dict_T *dict)
{
DictionaryObject *self;
self = PyObject_NEW(DictionaryObject, &DictionaryType);
if (self == NULL)
return NULL;
self->dict = dict;
++dict->dv_refcount;
pyll_add((PyObject *)(self), &self->ref, &lastdict);
return (PyObject *)(self);
}
static int
pydict_to_tv(PyObject *obj, typval_T *tv, PyObject *lookupDict)
{
dict_T *d;
char_u *key;
dictitem_T *di;
PyObject *keyObject;
PyObject *valObject;
Py_ssize_t iter = 0;
d = dict_alloc();
if (d == NULL)
{
PyErr_NoMemory();
return -1;
}
tv->v_type = VAR_DICT;
tv->vval.v_dict = d;
while (PyDict_Next(obj, &iter, &keyObject, &valObject))
{
DICTKEY_DECL
if (keyObject == NULL)
return -1;
if (valObject == NULL)
return -1;
DICTKEY_GET(-1)
di = dictitem_alloc(key);
DICTKEY_UNREF
if (di == NULL)
{
PyErr_NoMemory();
return -1;
}
di->di_tv.v_lock = 0;
if (_ConvertFromPyObject(valObject, &di->di_tv, lookupDict) == -1)
{
vim_free(di);
return -1;
}
if (dict_add(d, di) == FAIL)
{
vim_free(di);
PyErr_SetVim(_("failed to add key to dictionary"));
return -1;
}
}
return 0;
}
static int
pymap_to_tv(PyObject *obj, typval_T *tv, PyObject *lookupDict)
{
dict_T *d;
char_u *key;
dictitem_T *di;
PyObject *list;
PyObject *litem;
PyObject *keyObject;
PyObject *valObject;
Py_ssize_t lsize;
d = dict_alloc();
if (d == NULL)
{
PyErr_NoMemory();
return -1;
}
tv->v_type = VAR_DICT;
tv->vval.v_dict = d;
list = PyMapping_Items(obj);
lsize = PyList_Size(list);
while (lsize--)
{
DICTKEY_DECL
litem = PyList_GetItem(list, lsize);
if (litem == NULL)
{
Py_DECREF(list);
return -1;
}
keyObject = PyTuple_GetItem(litem, 0);
if (keyObject == NULL)
{
Py_DECREF(list);
Py_DECREF(litem);
return -1;
}
DICTKEY_GET(-1)
valObject = PyTuple_GetItem(litem, 1);
if (valObject == NULL)
{
Py_DECREF(list);
Py_DECREF(litem);
return -1;
}
di = dictitem_alloc(key);
DICTKEY_UNREF
if (di == NULL)
{
Py_DECREF(list);
Py_DECREF(litem);
PyErr_NoMemory();
return -1;
}
di->di_tv.v_lock = 0;
if (_ConvertFromPyObject(valObject, &di->di_tv, lookupDict) == -1)
{
vim_free(di);
Py_DECREF(list);
Py_DECREF(litem);
return -1;
}
if (dict_add(d, di) == FAIL)
{
vim_free(di);
Py_DECREF(list);
Py_DECREF(litem);
PyErr_SetVim(_("failed to add key to dictionary"));
return -1;
}
Py_DECREF(litem);
}
Py_DECREF(list);
return 0;
}
static PyInt
DictionaryLength(PyObject *self)
{
return ((PyInt) ((((DictionaryObject *)(self))->dict->dv_hashtab.ht_used)));
}
static PyObject *
DictionaryItem(PyObject *self, PyObject *keyObject)
{
char_u *key;
dictitem_T *val;
DICTKEY_DECL
DICTKEY_GET(NULL)
val = dict_find(((DictionaryObject *) (self))->dict, key, -1);
DICTKEY_UNREF
return ConvertToPyObject(&val->di_tv);
}
static PyInt
DictionaryAssItem(PyObject *self, PyObject *keyObject, PyObject *valObject)
{
char_u *key;
typval_T tv;
dict_T *d = ((DictionaryObject *)(self))->dict;
dictitem_T *di;
DICTKEY_DECL
if (d->dv_lock)
{
PyErr_SetVim(_("dict is locked"));
return -1;
}
DICTKEY_GET(-1)
di = dict_find(d, key, -1);
if (valObject == NULL)
{
hashitem_T *hi;
if (di == NULL)
{
PyErr_SetString(PyExc_IndexError, _("no such key in dictionary"));
return -1;
}
hi = hash_find(&d->dv_hashtab, di->di_key);
hash_remove(&d->dv_hashtab, hi);
dictitem_free(di);
return 0;
}
if (ConvertFromPyObject(valObject, &tv) == -1)
return -1;
if (di == NULL)
{
di = dictitem_alloc(key);
if (di == NULL)
{
PyErr_NoMemory();
return -1;
}
di->di_tv.v_lock = 0;
if (dict_add(d, di) == FAIL)
{
vim_free(di);
PyErr_SetVim(_("failed to add key to dictionary"));
return -1;
}
}
else
clear_tv(&di->di_tv);
DICTKEY_UNREF
copy_tv(&tv, &di->di_tv);
return 0;
}
static PyObject *
DictionaryListKeys(PyObject *self)
{
dict_T *dict = ((DictionaryObject *)(self))->dict;
long_u todo = dict->dv_hashtab.ht_used;
Py_ssize_t i = 0;
PyObject *r;
hashitem_T *hi;
r = PyList_New(todo);
for (hi = dict->dv_hashtab.ht_array; todo > 0; ++hi)
{
if (!HASHITEM_EMPTY(hi))
{
PyList_SetItem(r, i, PyBytes_FromString((char *)(hi->hi_key)));
--todo;
++i;
}
}
return r;
}
static struct PyMethodDef DictionaryMethods[] = {
{"keys", (PyCFunction)DictionaryListKeys, METH_NOARGS, ""},
{ NULL, NULL, 0, NULL }
};
static PyTypeObject ListType;
typedef struct
{
PyObject_HEAD
list_T *list;
pylinkedlist_T ref;
} ListObject;
static PyObject *
ListNew(list_T *list)
{
ListObject *self;
self = PyObject_NEW(ListObject, &ListType);
if (self == NULL)
return NULL;
self->list = list;
++list->lv_refcount;
pyll_add((PyObject *)(self), &self->ref, &lastlist);
return (PyObject *)(self);
}
static int
list_py_concat(list_T *l, PyObject *obj, PyObject *lookupDict)
{
Py_ssize_t i;
Py_ssize_t lsize = PySequence_Size(obj);
PyObject *litem;
listitem_T *li;
for(i=0; i<lsize; i++)
{
li = listitem_alloc();
if (li == NULL)
{
PyErr_NoMemory();
return -1;
}
li->li_tv.v_lock = 0;
litem = PySequence_GetItem(obj, i);
if (litem == NULL)
return -1;
if (_ConvertFromPyObject(litem, &li->li_tv, lookupDict) == -1)
return -1;
list_append(l, li);
}
return 0;
}
static int
pyseq_to_tv(PyObject *obj, typval_T *tv, PyObject *lookupDict)
{
list_T *l;
l = list_alloc();
if (l == NULL)
{
PyErr_NoMemory();
return -1;
}
tv->v_type = VAR_LIST;
tv->vval.v_list = l;
if (list_py_concat(l, obj, lookupDict) == -1)
return -1;
return 0;
}
static int
pyiter_to_tv(PyObject *obj, typval_T *tv, PyObject *lookupDict)
{
PyObject *iterator = PyObject_GetIter(obj);
PyObject *item;
list_T *l;
listitem_T *li;
l = list_alloc();
if (l == NULL)
{
PyErr_NoMemory();
return -1;
}
tv->vval.v_list = l;
tv->v_type = VAR_LIST;
if (iterator == NULL)
return -1;
while ((item = PyIter_Next(obj)))
{
li = listitem_alloc();
if (li == NULL)
{
PyErr_NoMemory();
return -1;
}
li->li_tv.v_lock = 0;