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1352 lines (1133 loc) · 36.2 KB
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/* This module makes GNU readline available to Python. It has ideas
* contributed by Lee Busby, LLNL, and William Magro, Cornell Theory
* Center. The completer interface was inspired by Lele Gaifax. More
* recently, it was largely rewritten by Guido van Rossum.
*/
/* Standard definitions */
#include "Python.h"
#include <stddef.h>
#include <setjmp.h>
#include <signal.h>
#include <errno.h>
#include <sys/time.h>
#if defined(HAVE_SETLOCALE)
/* GNU readline() mistakenly sets the LC_CTYPE locale.
* This is evil. Only the user or the app's main() should do this!
* We must save and restore the locale around the rl_initialize() call.
*/
#define SAVE_LOCALE
#include <locale.h>
#endif
#ifdef SAVE_LOCALE
# define RESTORE_LOCALE(sl) { setlocale(LC_CTYPE, sl); free(sl); }
#else
# define RESTORE_LOCALE(sl)
#endif
/* GNU readline definitions */
#undef HAVE_CONFIG_H /* Else readline/chardefs.h includes strings.h */
#include <readline/readline.h>
#include <readline/history.h>
#ifdef HAVE_RL_COMPLETION_MATCHES
#define completion_matches(x, y) \
rl_completion_matches((x), ((rl_compentry_func_t *)(y)))
#else
#if defined(_RL_FUNCTION_TYPEDEF)
extern char **completion_matches(char *, rl_compentry_func_t *);
#else
#if !defined(__APPLE__)
extern char **completion_matches(char *, CPFunction *);
#endif
#endif
#endif
#ifdef __APPLE__
/*
* It is possible to link the readline module to the readline
* emulation library of editline/libedit.
*
* On OSX this emulation library is not 100% API compatible
* with the "real" readline and cannot be detected at compile-time,
* hence we use a runtime check to detect if we're using libedit
*
* Currently there is one known API incompatibility:
* - 'get_history' has a 1-based index with GNU readline, and a 0-based
* index with older versions of libedit's emulation.
* - Note that replace_history and remove_history use a 0-based index
* with both implementations.
*/
static int using_libedit_emulation = 0;
static const char libedit_version_tag[] = "EditLine wrapper";
static int libedit_history_start = 0;
#endif /* __APPLE__ */
#ifdef HAVE_RL_COMPLETION_DISPLAY_MATCHES_HOOK
static void
on_completion_display_matches_hook(char **matches,
int num_matches, int max_length);
#endif
/* Memory allocated for rl_completer_word_break_characters
(see issue #17289 for the motivation). */
static char *completer_word_break_characters;
typedef struct {
/* Specify hook functions in Python */
PyObject *completion_display_matches_hook;
PyObject *startup_hook;
PyObject *pre_input_hook;
PyObject *completer; /* Specify a word completer in Python */
PyObject *begidx;
PyObject *endidx;
} readlinestate;
#define readline_state(o) ((readlinestate *)PyModule_GetState(o))
static int
readline_clear(PyObject *m)
{
readlinestate *state = readline_state(m);
Py_CLEAR(state->completion_display_matches_hook);
Py_CLEAR(state->startup_hook);
Py_CLEAR(state->pre_input_hook);
Py_CLEAR(state->completer);
Py_CLEAR(state->begidx);
Py_CLEAR(state->endidx);
return 0;
}
static int
readline_traverse(PyObject *m, visitproc visit, void *arg)
{
readlinestate *state = readline_state(m);
Py_VISIT(state->completion_display_matches_hook);
Py_VISIT(state->startup_hook);
Py_VISIT(state->pre_input_hook);
Py_VISIT(state->completer);
Py_VISIT(state->begidx);
Py_VISIT(state->endidx);
return 0;
}
static void
readline_free(void *m)
{
readline_clear((PyObject *)m);
}
static PyModuleDef readlinemodule;
#define readlinestate_global ((readlinestate *)PyModule_GetState(PyState_FindModule(&readlinemodule)))
/* Exported function to send one line to readline's init file parser */
static PyObject *
parse_and_bind(PyObject *self, PyObject *args)
{
char *s, *copy;
if (!PyArg_ParseTuple(args, "s:parse_and_bind", &s))
return NULL;
/* Make a copy -- rl_parse_and_bind() modifies its argument */
/* Bernard Herzog */
copy = PyMem_Malloc(1 + strlen(s));
if (copy == NULL)
return PyErr_NoMemory();
strcpy(copy, s);
rl_parse_and_bind(copy);
PyMem_Free(copy); /* Free the copy */
Py_RETURN_NONE;
}
PyDoc_STRVAR(doc_parse_and_bind,
"parse_and_bind(string) -> None\n\
Execute the init line provided in the string argument.");
/* Exported function to parse a readline init file */
static PyObject *
read_init_file(PyObject *self, PyObject *args)
{
PyObject *filename_obj = Py_None, *filename_bytes;
if (!PyArg_ParseTuple(args, "|O:read_init_file", &filename_obj))
return NULL;
if (filename_obj != Py_None) {
if (!PyUnicode_FSConverter(filename_obj, &filename_bytes))
return NULL;
errno = rl_read_init_file(PyBytes_AsString(filename_bytes));
Py_DECREF(filename_bytes);
} else
errno = rl_read_init_file(NULL);
if (errno)
return PyErr_SetFromErrno(PyExc_IOError);
Py_RETURN_NONE;
}
PyDoc_STRVAR(doc_read_init_file,
"read_init_file([filename]) -> None\n\
Execute a readline initialization file.\n\
The default filename is the last filename used.");
/* Exported function to load a readline history file */
static PyObject *
read_history_file(PyObject *self, PyObject *args)
{
PyObject *filename_obj = Py_None, *filename_bytes;
if (!PyArg_ParseTuple(args, "|O:read_history_file", &filename_obj))
return NULL;
if (filename_obj != Py_None) {
if (!PyUnicode_FSConverter(filename_obj, &filename_bytes))
return NULL;
errno = read_history(PyBytes_AsString(filename_bytes));
Py_DECREF(filename_bytes);
} else
errno = read_history(NULL);
if (errno)
return PyErr_SetFromErrno(PyExc_IOError);
Py_RETURN_NONE;
}
static int _history_length = -1; /* do not truncate history by default */
PyDoc_STRVAR(doc_read_history_file,
"read_history_file([filename]) -> None\n\
Load a readline history file.\n\
The default filename is ~/.history.");
/* Exported function to save a readline history file */
static PyObject *
write_history_file(PyObject *self, PyObject *args)
{
PyObject *filename_obj = Py_None, *filename_bytes;
char *filename;
int err;
if (!PyArg_ParseTuple(args, "|O:write_history_file", &filename_obj))
return NULL;
if (filename_obj != Py_None) {
if (!PyUnicode_FSConverter(filename_obj, &filename_bytes))
return NULL;
filename = PyBytes_AsString(filename_bytes);
} else {
filename_bytes = NULL;
filename = NULL;
}
errno = err = write_history(filename);
if (!err && _history_length >= 0)
history_truncate_file(filename, _history_length);
Py_XDECREF(filename_bytes);
errno = err;
if (errno)
return PyErr_SetFromErrno(PyExc_IOError);
Py_RETURN_NONE;
}
PyDoc_STRVAR(doc_write_history_file,
"write_history_file([filename]) -> None\n\
Save a readline history file.\n\
The default filename is ~/.history.");
#ifdef HAVE_RL_APPEND_HISTORY
/* Exported function to save part of a readline history file */
static PyObject *
append_history_file(PyObject *self, PyObject *args)
{
int nelements;
PyObject *filename_obj = Py_None, *filename_bytes;
char *filename;
int err;
if (!PyArg_ParseTuple(args, "i|O:append_history_file", &nelements, &filename_obj))
return NULL;
if (filename_obj != Py_None) {
if (!PyUnicode_FSConverter(filename_obj, &filename_bytes))
return NULL;
filename = PyBytes_AsString(filename_bytes);
} else {
filename_bytes = NULL;
filename = NULL;
}
errno = err = append_history(nelements, filename);
if (!err && _history_length >= 0)
history_truncate_file(filename, _history_length);
Py_XDECREF(filename_bytes);
errno = err;
if (errno)
return PyErr_SetFromErrno(PyExc_IOError);
Py_RETURN_NONE;
}
PyDoc_STRVAR(doc_append_history_file,
"append_history_file(nelements[, filename]) -> None\n\
Append the last nelements items of the history list to file.\n\
The default filename is ~/.history.");
#endif
/* Set history length */
static PyObject*
set_history_length(PyObject *self, PyObject *args)
{
int length = _history_length;
if (!PyArg_ParseTuple(args, "i:set_history_length", &length))
return NULL;
_history_length = length;
Py_RETURN_NONE;
}
PyDoc_STRVAR(set_history_length_doc,
"set_history_length(length) -> None\n\
set the maximal number of lines which will be written to\n\
the history file. A negative length is used to inhibit\n\
history truncation.");
/* Get history length */
static PyObject*
get_history_length(PyObject *self, PyObject *noarg)
{
return PyLong_FromLong(_history_length);
}
PyDoc_STRVAR(get_history_length_doc,
"get_history_length() -> int\n\
return the maximum number of lines that will be written to\n\
the history file.");
/* Generic hook function setter */
static PyObject *
set_hook(const char *funcname, PyObject **hook_var, PyObject *args)
{
PyObject *function = Py_None;
char buf[80];
PyOS_snprintf(buf, sizeof(buf), "|O:set_%.50s", funcname);
if (!PyArg_ParseTuple(args, buf, &function))
return NULL;
if (function == Py_None) {
Py_CLEAR(*hook_var);
}
else if (PyCallable_Check(function)) {
Py_INCREF(function);
Py_SETREF(*hook_var, function);
}
else {
PyErr_Format(PyExc_TypeError,
"set_%.50s(func): argument not callable",
funcname);
return NULL;
}
Py_RETURN_NONE;
}
static PyObject *
set_completion_display_matches_hook(PyObject *self, PyObject *args)
{
PyObject *result = set_hook("completion_display_matches_hook",
&readlinestate_global->completion_display_matches_hook, args);
#ifdef HAVE_RL_COMPLETION_DISPLAY_MATCHES_HOOK
/* We cannot set this hook globally, since it replaces the
default completion display. */
rl_completion_display_matches_hook =
readlinestate_global->completion_display_matches_hook ?
#if defined(_RL_FUNCTION_TYPEDEF)
(rl_compdisp_func_t *)on_completion_display_matches_hook : 0;
#else
(VFunction *)on_completion_display_matches_hook : 0;
#endif
#endif
return result;
}
PyDoc_STRVAR(doc_set_completion_display_matches_hook,
"set_completion_display_matches_hook([function]) -> None\n\
Set or remove the completion display function.\n\
The function is called as\n\
function(substitution, [matches], longest_match_length)\n\
once each time matches need to be displayed.");
static PyObject *
set_startup_hook(PyObject *self, PyObject *args)
{
return set_hook("startup_hook", &readlinestate_global->startup_hook, args);
}
PyDoc_STRVAR(doc_set_startup_hook,
"set_startup_hook([function]) -> None\n\
Set or remove the function invoked by the rl_startup_hook callback.\n\
The function is called with no arguments just\n\
before readline prints the first prompt.");
#ifdef HAVE_RL_PRE_INPUT_HOOK
/* Set pre-input hook */
static PyObject *
set_pre_input_hook(PyObject *self, PyObject *args)
{
return set_hook("pre_input_hook", &readlinestate_global->pre_input_hook, args);
}
PyDoc_STRVAR(doc_set_pre_input_hook,
"set_pre_input_hook([function]) -> None\n\
Set or remove the function invoked by the rl_pre_input_hook callback.\n\
The function is called with no arguments after the first prompt\n\
has been printed and just before readline starts reading input\n\
characters.");
#endif
/* Get the completion type for the scope of the tab-completion */
static PyObject *
get_completion_type(PyObject *self, PyObject *noarg)
{
return PyLong_FromLong(rl_completion_type);
}
PyDoc_STRVAR(doc_get_completion_type,
"get_completion_type() -> int\n\
Get the type of completion being attempted.");
/* Get the beginning index for the scope of the tab-completion */
static PyObject *
get_begidx(PyObject *self, PyObject *noarg)
{
Py_INCREF(readlinestate_global->begidx);
return readlinestate_global->begidx;
}
PyDoc_STRVAR(doc_get_begidx,
"get_begidx() -> int\n\
get the beginning index of the completion scope");
/* Get the ending index for the scope of the tab-completion */
static PyObject *
get_endidx(PyObject *self, PyObject *noarg)
{
Py_INCREF(readlinestate_global->endidx);
return readlinestate_global->endidx;
}
PyDoc_STRVAR(doc_get_endidx,
"get_endidx() -> int\n\
get the ending index of the completion scope");
/* Set the tab-completion word-delimiters that readline uses */
static PyObject *
set_completer_delims(PyObject *self, PyObject *args)
{
char *break_chars;
if (!PyArg_ParseTuple(args, "s:set_completer_delims", &break_chars)) {
return NULL;
}
/* Keep a reference to the allocated memory in the module state in case
some other module modifies rl_completer_word_break_characters
(see issue #17289). */
break_chars = strdup(break_chars);
if (break_chars) {
free(completer_word_break_characters);
completer_word_break_characters = break_chars;
rl_completer_word_break_characters = break_chars;
Py_RETURN_NONE;
}
else
return PyErr_NoMemory();
}
PyDoc_STRVAR(doc_set_completer_delims,
"set_completer_delims(string) -> None\n\
set the word delimiters for completion");
/* _py_free_history_entry: Utility function to free a history entry. */
#if defined(RL_READLINE_VERSION) && RL_READLINE_VERSION >= 0x0500
/* Readline version >= 5.0 introduced a timestamp field into the history entry
structure; this needs to be freed to avoid a memory leak. This version of
readline also introduced the handy 'free_history_entry' function, which
takes care of the timestamp. */
static void
_py_free_history_entry(HIST_ENTRY *entry)
{
histdata_t data = free_history_entry(entry);
free(data);
}
#else
/* No free_history_entry function; free everything manually. */
static void
_py_free_history_entry(HIST_ENTRY *entry)
{
if (entry->line)
free((void *)entry->line);
if (entry->data)
free(entry->data);
free(entry);
}
#endif
static PyObject *
py_remove_history(PyObject *self, PyObject *args)
{
int entry_number;
HIST_ENTRY *entry;
if (!PyArg_ParseTuple(args, "i:remove_history_item", &entry_number))
return NULL;
if (entry_number < 0) {
PyErr_SetString(PyExc_ValueError,
"History index cannot be negative");
return NULL;
}
entry = remove_history(entry_number);
if (!entry) {
PyErr_Format(PyExc_ValueError,
"No history item at position %d",
entry_number);
return NULL;
}
/* free memory allocated for the history entry */
_py_free_history_entry(entry);
Py_RETURN_NONE;
}
PyDoc_STRVAR(doc_remove_history,
"remove_history_item(pos) -> None\n\
remove history item given by its position");
static PyObject *
py_replace_history(PyObject *self, PyObject *args)
{
int entry_number;
char *line;
HIST_ENTRY *old_entry;
if (!PyArg_ParseTuple(args, "is:replace_history_item", &entry_number,
&line)) {
return NULL;
}
if (entry_number < 0) {
PyErr_SetString(PyExc_ValueError,
"History index cannot be negative");
return NULL;
}
old_entry = replace_history_entry(entry_number, line, (void *)NULL);
if (!old_entry) {
PyErr_Format(PyExc_ValueError,
"No history item at position %d",
entry_number);
return NULL;
}
/* free memory allocated for the old history entry */
_py_free_history_entry(old_entry);
Py_RETURN_NONE;
}
PyDoc_STRVAR(doc_replace_history,
"replace_history_item(pos, line) -> None\n\
replaces history item given by its position with contents of line");
/* Add a line to the history buffer */
static PyObject *
py_add_history(PyObject *self, PyObject *args)
{
char *line;
if(!PyArg_ParseTuple(args, "s:add_history", &line)) {
return NULL;
}
add_history(line);
Py_RETURN_NONE;
}
PyDoc_STRVAR(doc_add_history,
"add_history(string) -> None\n\
add an item to the history buffer");
/* Get the tab-completion word-delimiters that readline uses */
static PyObject *
get_completer_delims(PyObject *self, PyObject *noarg)
{
return PyUnicode_FromString(rl_completer_word_break_characters);
}
PyDoc_STRVAR(doc_get_completer_delims,
"get_completer_delims() -> string\n\
get the word delimiters for completion");
/* Set the completer function */
static PyObject *
set_completer(PyObject *self, PyObject *args)
{
return set_hook("completer", &readlinestate_global->completer, args);
}
PyDoc_STRVAR(doc_set_completer,
"set_completer([function]) -> None\n\
Set or remove the completer function.\n\
The function is called as function(text, state),\n\
for state in 0, 1, 2, ..., until it returns a non-string.\n\
It should return the next possible completion starting with 'text'.");
static PyObject *
get_completer(PyObject *self, PyObject *noargs)
{
if (readlinestate_global->completer == NULL) {
Py_RETURN_NONE;
}
Py_INCREF(readlinestate_global->completer);
return readlinestate_global->completer;
}
PyDoc_STRVAR(doc_get_completer,
"get_completer() -> function\n\
\n\
Returns current completer function.");
/* Private function to get current length of history. XXX It may be
* possible to replace this with a direct use of history_length instead,
* but it's not clear whether BSD's libedit keeps history_length up to date.
* See issue #8065.*/
static int
_py_get_history_length(void)
{
HISTORY_STATE *hist_st = history_get_history_state();
int length = hist_st->length;
/* the history docs don't say so, but the address of hist_st changes each
time history_get_history_state is called which makes me think it's
freshly malloc'd memory... on the other hand, the address of the last
line stays the same as long as history isn't extended, so it appears to
be malloc'd but managed by the history package... */
free(hist_st);
return length;
}
/* Exported function to get any element of history */
static PyObject *
get_history_item(PyObject *self, PyObject *args)
{
int idx = 0;
HIST_ENTRY *hist_ent;
if (!PyArg_ParseTuple(args, "i:get_history_item", &idx))
return NULL;
#ifdef __APPLE__
if (using_libedit_emulation) {
/* Older versions of libedit's readline emulation
* use 0-based indexes, while readline and newer
* versions of libedit use 1-based indexes.
*/
int length = _py_get_history_length();
idx = idx - 1 + libedit_history_start;
/*
* Apple's readline emulation crashes when
* the index is out of range, therefore
* test for that and fail gracefully.
*/
if (idx < (0 + libedit_history_start)
|| idx >= (length + libedit_history_start)) {
Py_RETURN_NONE;
}
}
#endif /* __APPLE__ */
if ((hist_ent = history_get(idx)))
return PyUnicode_FromString(hist_ent->line);
else {
Py_RETURN_NONE;
}
}
PyDoc_STRVAR(doc_get_history_item,
"get_history_item() -> string\n\
return the current contents of history item at index.");
/* Exported function to get current length of history */
static PyObject *
get_current_history_length(PyObject *self, PyObject *noarg)
{
return PyLong_FromLong((long)_py_get_history_length());
}
PyDoc_STRVAR(doc_get_current_history_length,
"get_current_history_length() -> integer\n\
return the current (not the maximum) length of history.");
/* Exported function to read the current line buffer */
static PyObject *
get_line_buffer(PyObject *self, PyObject *noarg)
{
return PyUnicode_FromString(rl_line_buffer);
}
PyDoc_STRVAR(doc_get_line_buffer,
"get_line_buffer() -> string\n\
return the current contents of the line buffer.");
#ifdef HAVE_RL_COMPLETION_APPEND_CHARACTER
/* Exported function to clear the current history */
static PyObject *
py_clear_history(PyObject *self, PyObject *noarg)
{
clear_history();
Py_RETURN_NONE;
}
PyDoc_STRVAR(doc_clear_history,
"clear_history() -> None\n\
Clear the current readline history.");
#endif
/* Exported function to insert text into the line buffer */
static PyObject *
insert_text(PyObject *self, PyObject *args)
{
char *s;
if (!PyArg_ParseTuple(args, "s:insert_text", &s))
return NULL;
rl_insert_text(s);
Py_RETURN_NONE;
}
PyDoc_STRVAR(doc_insert_text,
"insert_text(string) -> None\n\
Insert text into the line buffer at the cursor position.");
/* Redisplay the line buffer */
static PyObject *
redisplay(PyObject *self, PyObject *noarg)
{
rl_redisplay();
Py_RETURN_NONE;
}
PyDoc_STRVAR(doc_redisplay,
"redisplay() -> None\n\
Change what's displayed on the screen to reflect the current\n\
contents of the line buffer.");
/* Table of functions exported by the module */
static struct PyMethodDef readline_methods[] =
{
{"parse_and_bind", parse_and_bind, METH_VARARGS, doc_parse_and_bind},
{"get_line_buffer", get_line_buffer, METH_NOARGS, doc_get_line_buffer},
{"insert_text", insert_text, METH_VARARGS, doc_insert_text},
{"redisplay", redisplay, METH_NOARGS, doc_redisplay},
{"read_init_file", read_init_file, METH_VARARGS, doc_read_init_file},
{"read_history_file", read_history_file,
METH_VARARGS, doc_read_history_file},
{"write_history_file", write_history_file,
METH_VARARGS, doc_write_history_file},
#ifdef HAVE_RL_APPEND_HISTORY
{"append_history_file", append_history_file,
METH_VARARGS, doc_append_history_file},
#endif
{"get_history_item", get_history_item,
METH_VARARGS, doc_get_history_item},
{"get_current_history_length", (PyCFunction)get_current_history_length,
METH_NOARGS, doc_get_current_history_length},
{"set_history_length", set_history_length,
METH_VARARGS, set_history_length_doc},
{"get_history_length", get_history_length,
METH_NOARGS, get_history_length_doc},
{"set_completer", set_completer, METH_VARARGS, doc_set_completer},
{"get_completer", get_completer, METH_NOARGS, doc_get_completer},
{"get_completion_type", get_completion_type,
METH_NOARGS, doc_get_completion_type},
{"get_begidx", get_begidx, METH_NOARGS, doc_get_begidx},
{"get_endidx", get_endidx, METH_NOARGS, doc_get_endidx},
{"set_completer_delims", set_completer_delims,
METH_VARARGS, doc_set_completer_delims},
{"add_history", py_add_history, METH_VARARGS, doc_add_history},
{"remove_history_item", py_remove_history, METH_VARARGS, doc_remove_history},
{"replace_history_item", py_replace_history, METH_VARARGS, doc_replace_history},
{"get_completer_delims", get_completer_delims,
METH_NOARGS, doc_get_completer_delims},
{"set_completion_display_matches_hook", set_completion_display_matches_hook,
METH_VARARGS, doc_set_completion_display_matches_hook},
{"set_startup_hook", set_startup_hook,
METH_VARARGS, doc_set_startup_hook},
#ifdef HAVE_RL_PRE_INPUT_HOOK
{"set_pre_input_hook", set_pre_input_hook,
METH_VARARGS, doc_set_pre_input_hook},
#endif
#ifdef HAVE_RL_COMPLETION_APPEND_CHARACTER
{"clear_history", py_clear_history, METH_NOARGS, doc_clear_history},
#endif
{0, 0}
};
/* C function to call the Python hooks. */
static int
on_hook(PyObject *func)
{
int result = 0;
if (func != NULL) {
PyObject *r;
r = PyObject_CallFunction(func, NULL);
if (r == NULL)
goto error;
if (r == Py_None)
result = 0;
else {
result = _PyLong_AsInt(r);
if (result == -1 && PyErr_Occurred())
goto error;
}
Py_DECREF(r);
goto done;
error:
PyErr_Clear();
Py_XDECREF(r);
done:
return result;
}
return result;
}
static int
#if defined(_RL_FUNCTION_TYPEDEF)
on_startup_hook(void)
#else
on_startup_hook()
#endif
{
int r;
#ifdef WITH_THREAD
PyGILState_STATE gilstate = PyGILState_Ensure();
#endif
r = on_hook(readlinestate_global->startup_hook);
#ifdef WITH_THREAD
PyGILState_Release(gilstate);
#endif
return r;
}
#ifdef HAVE_RL_PRE_INPUT_HOOK
static int
#if defined(_RL_FUNCTION_TYPEDEF)
on_pre_input_hook(void)
#else
on_pre_input_hook()
#endif
{
int r;
#ifdef WITH_THREAD
PyGILState_STATE gilstate = PyGILState_Ensure();
#endif
r = on_hook(readlinestate_global->pre_input_hook);
#ifdef WITH_THREAD
PyGILState_Release(gilstate);
#endif
return r;
}
#endif
/* C function to call the Python completion_display_matches */
#ifdef HAVE_RL_COMPLETION_DISPLAY_MATCHES_HOOK
static void
on_completion_display_matches_hook(char **matches,
int num_matches, int max_length)
{
int i;
PyObject *m=NULL, *s=NULL, *r=NULL;
#ifdef WITH_THREAD
PyGILState_STATE gilstate = PyGILState_Ensure();
#endif
m = PyList_New(num_matches);
if (m == NULL)
goto error;
for (i = 0; i < num_matches; i++) {
s = PyUnicode_FromString(matches[i+1]);
if (s == NULL)
goto error;
if (PyList_SetItem(m, i, s) == -1)
goto error;
}
r = PyObject_CallFunction(readlinestate_global->completion_display_matches_hook,
"sOi", matches[0], m, max_length);
Py_DECREF(m); m=NULL;
if (r == NULL ||
(r != Py_None && PyLong_AsLong(r) == -1 && PyErr_Occurred())) {
goto error;
}
Py_CLEAR(r);
if (0) {
error:
PyErr_Clear();
Py_XDECREF(m);
Py_XDECREF(r);
}
#ifdef WITH_THREAD
PyGILState_Release(gilstate);
#endif
}
#endif
#ifdef HAVE_RL_RESIZE_TERMINAL
static volatile sig_atomic_t sigwinch_received;
static PyOS_sighandler_t sigwinch_ohandler;
static void
readline_sigwinch_handler(int signum)
{
sigwinch_received = 1;
if (sigwinch_ohandler &&
sigwinch_ohandler != SIG_IGN && sigwinch_ohandler != SIG_DFL)
sigwinch_ohandler(signum);
#ifndef HAVE_SIGACTION
/* If the handler was installed with signal() rather than sigaction(),
we need to reinstall it. */
PyOS_setsig(SIGWINCH, readline_sigwinch_handler);
#endif
}
#endif
/* C function to call the Python completer. */
static char *
on_completion(const char *text, int state)
{
char *result = NULL;
if (readlinestate_global->completer != NULL) {
PyObject *r;
#ifdef WITH_THREAD
PyGILState_STATE gilstate = PyGILState_Ensure();
#endif
rl_attempted_completion_over = 1;
r = PyObject_CallFunction(readlinestate_global->completer, "si", text, state);
if (r == NULL)
goto error;
if (r == Py_None) {
result = NULL;
}
else {
char *s = _PyUnicode_AsString(r);
if (s == NULL)
goto error;
result = strdup(s);
}
Py_DECREF(r);
goto done;
error:
PyErr_Clear();
Py_XDECREF(r);
done:
#ifdef WITH_THREAD
PyGILState_Release(gilstate);
#endif
return result;
}
return result;
}
/* A more flexible constructor that saves the "begidx" and "endidx"
* before calling the normal completer */
static char **
flex_complete(const char *text, int start, int end)
{
char **result;
#ifdef WITH_THREAD
PyGILState_STATE gilstate = PyGILState_Ensure();
#endif
#ifdef HAVE_RL_COMPLETION_APPEND_CHARACTER
rl_completion_append_character ='\0';
#endif