symbian-qemu-0.9.1-12/python-2.6.1/Modules/readline.c
changeset 1 2fb8b9db1c86
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Modules/readline.c	Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,1026 @@
+/* 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 <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
+extern char **completion_matches(char *, CPFunction *);
+#endif
+#endif
+
+static void
+on_completion_display_matches_hook(char **matches,
+				   int num_matches, int max_length);
+
+
+/* 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 = malloc(1 + strlen(s));
+	if (copy == NULL)
+		return PyErr_NoMemory();
+	strcpy(copy, s);
+	rl_parse_and_bind(copy);
+	free(copy); /* Free the copy */
+	Py_RETURN_NONE;
+}
+
+PyDoc_STRVAR(doc_parse_and_bind,
+"parse_and_bind(string) -> None\n\
+Parse and execute single line of a readline init file.");
+
+
+/* Exported function to parse a readline init file */
+
+static PyObject *
+read_init_file(PyObject *self, PyObject *args)
+{
+	char *s = NULL;
+	if (!PyArg_ParseTuple(args, "|z:read_init_file", &s))
+		return NULL;
+	errno = rl_read_init_file(s);
+	if (errno)
+		return PyErr_SetFromErrno(PyExc_IOError);
+	Py_RETURN_NONE;
+}
+
+PyDoc_STRVAR(doc_read_init_file,
+"read_init_file([filename]) -> None\n\
+Parse 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)
+{
+	char *s = NULL;
+	if (!PyArg_ParseTuple(args, "|z:read_history_file", &s))
+		return NULL;
+	errno = read_history(s);
+	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)
+{
+	char *s = NULL;
+	if (!PyArg_ParseTuple(args, "|z:write_history_file", &s))
+		return NULL;
+	errno = write_history(s);
+	if (!errno && _history_length >= 0)
+		history_truncate_file(s, _history_length);
+	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.");
+
+
+/* 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 items 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 PyInt_FromLong(_history_length);
+}
+
+PyDoc_STRVAR(get_history_length_doc,
+"get_history_length() -> int\n\
+return the maximum number of items 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_XDECREF(*hook_var);
+		*hook_var = NULL;
+	}
+	else if (PyCallable_Check(function)) {
+		PyObject *tmp = *hook_var;
+		Py_INCREF(function);
+		*hook_var = function;
+		Py_XDECREF(tmp);
+	}
+	else {
+		PyOS_snprintf(buf, sizeof(buf),
+			      "set_%.50s(func): argument not callable",
+			      funcname);
+		PyErr_SetString(PyExc_TypeError, buf);
+		return NULL;
+	}
+	Py_RETURN_NONE;
+}
+
+
+/* Exported functions to specify hook functions in Python */
+
+static PyObject *completion_display_matches_hook = NULL;
+static PyObject *startup_hook = NULL;
+
+#ifdef HAVE_RL_PRE_INPUT_HOOK
+static PyObject *pre_input_hook = NULL;
+#endif
+
+static PyObject *
+set_completion_display_matches_hook(PyObject *self, PyObject *args)
+{
+	PyObject *result = set_hook("completion_display_matches_hook",
+			&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 =
+		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", &startup_hook, args);
+}
+
+PyDoc_STRVAR(doc_set_startup_hook,
+"set_startup_hook([function]) -> None\n\
+Set or remove the startup_hook function.\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", &pre_input_hook, args);
+}
+
+PyDoc_STRVAR(doc_set_pre_input_hook,
+"set_pre_input_hook([function]) -> None\n\
+Set or remove the pre_input_hook function.\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
+
+
+/* Exported function to specify a word completer in Python */
+
+static PyObject *completer = NULL;
+
+static PyObject *begidx = NULL;
+static PyObject *endidx = NULL;
+
+
+/* Get the completion type for the scope of the tab-completion */
+static PyObject *
+get_completion_type(PyObject *self, PyObject *noarg)
+{
+  return PyInt_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(begidx);
+	return begidx;
+}
+
+PyDoc_STRVAR(doc_get_begidx,
+"get_begidx() -> int\n\
+get the beginning index of the readline tab-completion scope");
+
+
+/* Get the ending index for the scope of the tab-completion */
+
+static PyObject *
+get_endidx(PyObject *self, PyObject *noarg)
+{
+	Py_INCREF(endidx);
+	return endidx;
+}
+
+PyDoc_STRVAR(doc_get_endidx,
+"get_endidx() -> int\n\
+get the ending index of the readline tab-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;
+	}
+	free((void*)rl_completer_word_break_characters);
+	rl_completer_word_break_characters = strdup(break_chars);
+	Py_RETURN_NONE;
+}
+
+PyDoc_STRVAR(doc_set_completer_delims,
+"set_completer_delims(string) -> None\n\
+set the readline word delimiters for tab-completion");
+
+static PyObject *
+py_remove_history(PyObject *self, PyObject *args)
+{
+	int entry_number;
+	HIST_ENTRY *entry;
+
+	if (!PyArg_ParseTuple(args, "i:remove_history", &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 */
+	if (entry->line)
+		free(entry->line);
+	if (entry->data)
+		free(entry->data);
+	free(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", &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 */
+	if (old_entry->line)
+	    free(old_entry->line);
+	if (old_entry->data)
+	    free(old_entry->data);
+	free(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 a line to the history buffer");
+
+
+/* Get the tab-completion word-delimiters that readline uses */
+
+static PyObject *
+get_completer_delims(PyObject *self, PyObject *noarg)
+{
+	return PyString_FromString(rl_completer_word_break_characters);
+}
+
+PyDoc_STRVAR(doc_get_completer_delims,
+"get_completer_delims() -> string\n\
+get the readline word delimiters for tab-completion");
+
+
+/* Set the completer function */
+
+static PyObject *
+set_completer(PyObject *self, PyObject *args)
+{
+	return set_hook("completer", &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 (completer == NULL) {
+		Py_RETURN_NONE;
+	}
+	Py_INCREF(completer);
+	return completer;
+}
+
+PyDoc_STRVAR(doc_get_completer,
+"get_completer() -> function\n\
+\n\
+Returns current completer function.");
+
+/* 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:index", &idx))
+		return NULL;
+	if ((hist_ent = history_get(idx)))
+		return PyString_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)
+{
+	HISTORY_STATE *hist_st;
+
+	hist_st = history_get_history_state();
+	return PyInt_FromLong(hist_st ? (long) hist_st->length : (long) 0);
+}
+
+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 PyString_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 command line.");
+
+
+/* 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},
+	{"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;
+#ifdef WITH_THREAD
+		PyGILState_STATE gilstate = PyGILState_Ensure();
+#endif
+		r = PyObject_CallFunction(func, NULL);
+		if (r == NULL)
+			goto error;
+		if (r == Py_None)
+			result = 0;
+		else {
+			result = PyInt_AsLong(r);
+			if (result == -1 && PyErr_Occurred()) 
+				goto error;
+		}
+		Py_DECREF(r);
+		goto done;
+	  error:
+		PyErr_Clear();
+		Py_XDECREF(r);
+	  done:
+#ifdef WITH_THREAD
+		PyGILState_Release(gilstate);
+#endif
+		return result;
+	}
+	return result;
+}
+
+static int
+on_startup_hook(void)
+{
+	return on_hook(startup_hook);
+}
+
+#ifdef HAVE_RL_PRE_INPUT_HOOK
+static int
+on_pre_input_hook(void)
+{
+	return on_hook(pre_input_hook);
+}
+#endif
+
+
+/* C function to call the Python completion_display_matches */
+
+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 = PyString_FromString(matches[i+1]);
+		if (s == NULL)
+			goto error;
+		if (PyList_SetItem(m, i, s) == -1)
+			goto error;
+	}
+
+	r = PyObject_CallFunction(completion_display_matches_hook,
+				  "sOi", matches[0], m, max_length);
+
+	Py_DECREF(m), m=NULL;
+	
+	if (r == NULL ||
+	    (r != Py_None && PyInt_AsLong(r) == -1 && PyErr_Occurred())) {
+		goto error;
+	}
+	Py_XDECREF(r), r=NULL;
+
+	if (0) {
+	error:
+		PyErr_Clear();
+		Py_XDECREF(m);
+		Py_XDECREF(r);
+	}
+#ifdef WITH_THREAD
+	PyGILState_Release(gilstate);
+#endif
+}
+
+
+/* C function to call the Python completer. */
+
+static char *
+on_completion(const char *text, int state)
+{
+	char *result = NULL;
+	if (completer != NULL) {
+		PyObject *r;
+#ifdef WITH_THREAD	      
+		PyGILState_STATE gilstate = PyGILState_Ensure();
+#endif
+		rl_attempted_completion_over = 1;
+		r = PyObject_CallFunction(completer, "si", text, state);
+		if (r == NULL)
+			goto error;
+		if (r == Py_None) {
+			result = NULL;
+		}
+		else {
+			char *s = PyString_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(char *text, int start, int end)
+{
+	Py_XDECREF(begidx);
+	Py_XDECREF(endidx);
+	begidx = PyInt_FromLong((long) start);
+	endidx = PyInt_FromLong((long) end);
+	return completion_matches(text, *on_completion);
+}
+
+
+/* Helper to initialize GNU readline properly. */
+
+static void
+setup_readline(void)
+{
+#ifdef SAVE_LOCALE
+	char *saved_locale = strdup(setlocale(LC_CTYPE, NULL));
+	if (!saved_locale)
+		Py_FatalError("not enough memory to save locale");
+#endif
+
+	using_history();
+
+	rl_readline_name = "python";
+#if defined(PYOS_OS2) && defined(PYCC_GCC)
+	/* Allow $if term= in .inputrc to work */
+	rl_terminal_name = getenv("TERM");
+#endif
+	/* Force rebind of TAB to insert-tab */
+	rl_bind_key('\t', rl_insert);
+	/* Bind both ESC-TAB and ESC-ESC to the completion function */
+	rl_bind_key_in_map ('\t', rl_complete, emacs_meta_keymap);
+	rl_bind_key_in_map ('\033', rl_complete, emacs_meta_keymap);
+	/* Set our hook functions */
+	rl_startup_hook = (Function *)on_startup_hook;
+#ifdef HAVE_RL_PRE_INPUT_HOOK
+	rl_pre_input_hook = (Function *)on_pre_input_hook;
+#endif
+	/* Set our completion function */
+	rl_attempted_completion_function = (CPPFunction *)flex_complete;
+	/* Set Python word break characters */
+	rl_completer_word_break_characters =
+		strdup(" \t\n`~!@#$%^&*()-=+[{]}\\|;:'\",<>/?");
+		/* All nonalphanums except '.' */
+#ifdef HAVE_RL_COMPLETION_APPEND_CHARACTER
+	rl_completion_append_character ='\0';
+#endif
+
+	begidx = PyInt_FromLong(0L);
+	endidx = PyInt_FromLong(0L);
+	/* Initialize (allows .inputrc to override)
+	 *
+	 * XXX: A bug in the readline-2.2 library causes a memory leak
+	 * inside this function.  Nothing we can do about it.
+	 */
+	rl_initialize();
+
+	RESTORE_LOCALE(saved_locale)
+}
+
+/* Wrapper around GNU readline that handles signals differently. */
+
+
+#if defined(HAVE_RL_CALLBACK) && defined(HAVE_SELECT)
+
+static	char *completed_input_string;
+static void
+rlhandler(char *text)
+{
+	completed_input_string = text;
+	rl_callback_handler_remove();
+}
+
+extern PyThreadState* _PyOS_ReadlineTState;
+
+static char *
+readline_until_enter_or_signal(char *prompt, int *signal)
+{
+	char * not_done_reading = "";
+	fd_set selectset;
+
+	*signal = 0;
+#ifdef HAVE_RL_CATCH_SIGNAL
+	rl_catch_signals = 0;
+#endif
+
+	rl_callback_handler_install (prompt, rlhandler);
+	FD_ZERO(&selectset);
+	
+	completed_input_string = not_done_reading;
+
+	while (completed_input_string == not_done_reading) {
+		int has_input = 0;
+
+		while (!has_input)
+		{	struct timeval timeout = {0, 100000}; /* 0.1 seconds */
+
+			/* [Bug #1552726] Only limit the pause if an input hook has been 
+			   defined.  */
+		 	struct timeval *timeoutp = NULL;
+			if (PyOS_InputHook) 
+				timeoutp = &timeout;
+			FD_SET(fileno(rl_instream), &selectset);
+			/* select resets selectset if no input was available */
+			has_input = select(fileno(rl_instream) + 1, &selectset,
+					   NULL, NULL, timeoutp);
+			if(PyOS_InputHook) PyOS_InputHook();
+		}
+
+		if(has_input > 0) {
+			rl_callback_read_char();
+		}
+		else if (errno == EINTR) {
+			int s;
+#ifdef WITH_THREAD
+			PyEval_RestoreThread(_PyOS_ReadlineTState);
+#endif
+			s = PyErr_CheckSignals();
+#ifdef WITH_THREAD
+			PyEval_SaveThread();	
+#endif
+			if (s < 0) {
+				rl_free_line_state();
+				rl_cleanup_after_signal();
+				rl_callback_handler_remove();
+				*signal = 1;
+				completed_input_string = NULL;
+			}
+		}
+	}
+
+	return completed_input_string;
+}
+
+
+#else
+
+/* Interrupt handler */
+
+static jmp_buf jbuf;
+
+/* ARGSUSED */
+static void
+onintr(int sig)
+{
+	longjmp(jbuf, 1);
+}
+
+
+static char *
+readline_until_enter_or_signal(char *prompt, int *signal)
+{
+	PyOS_sighandler_t old_inthandler;
+	char *p;
+    
+	*signal = 0;
+
+	old_inthandler = PyOS_setsig(SIGINT, onintr);
+	if (setjmp(jbuf)) {
+#ifdef HAVE_SIGRELSE
+		/* This seems necessary on SunOS 4.1 (Rasmus Hahn) */
+		sigrelse(SIGINT);
+#endif
+		PyOS_setsig(SIGINT, old_inthandler);
+		*signal = 1;
+		return NULL;
+	}
+	rl_event_hook = PyOS_InputHook;
+	p = readline(prompt);
+	PyOS_setsig(SIGINT, old_inthandler);
+
+    return p;
+}
+#endif /*defined(HAVE_RL_CALLBACK) && defined(HAVE_SELECT) */
+
+
+static char *
+call_readline(FILE *sys_stdin, FILE *sys_stdout, char *prompt)
+{
+	size_t n;
+	char *p, *q;
+	int signal;
+
+#ifdef SAVE_LOCALE
+	char *saved_locale = strdup(setlocale(LC_CTYPE, NULL));
+	if (!saved_locale)
+		Py_FatalError("not enough memory to save locale");
+	setlocale(LC_CTYPE, "");
+#endif
+
+	if (sys_stdin != rl_instream || sys_stdout != rl_outstream) {
+		rl_instream = sys_stdin;
+		rl_outstream = sys_stdout;
+#ifdef HAVE_RL_COMPLETION_APPEND_CHARACTER
+		rl_prep_terminal (1);
+#endif
+	}
+
+	p = readline_until_enter_or_signal(prompt, &signal);
+	
+	/* we got an interrupt signal */
+	if (signal) {
+		RESTORE_LOCALE(saved_locale)
+		return NULL;
+	}
+
+	/* We got an EOF, return a empty string. */
+	if (p == NULL) {
+		p = PyMem_Malloc(1);
+		if (p != NULL)
+			*p = '\0';
+		RESTORE_LOCALE(saved_locale)
+		return p;
+	}
+
+	/* we have a valid line */
+	n = strlen(p);
+	if (n > 0) {
+		char *line;
+		HISTORY_STATE *state = history_get_history_state();
+		if (state->length > 0)
+			line = history_get(state->length)->line;
+		else
+			line = "";
+		if (strcmp(p, line))
+			add_history(p);
+		/* the history docs don't say so, but the address of state
+		   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(state);
+	}
+	/* Copy the malloc'ed buffer into a PyMem_Malloc'ed one and
+	   release the original. */
+	q = p;
+	p = PyMem_Malloc(n+2);
+	if (p != NULL) {
+		strncpy(p, q, n);
+		p[n] = '\n';
+		p[n+1] = '\0';
+	}
+	free(q);
+	RESTORE_LOCALE(saved_locale)
+	return p;
+}
+
+
+/* Initialize the module */
+
+PyDoc_STRVAR(doc_module,
+"Importing this module enables command line editing using GNU readline.");
+
+PyMODINIT_FUNC
+initreadline(void)
+{
+	PyObject *m;
+
+	m = Py_InitModule4("readline", readline_methods, doc_module,
+			   (PyObject *)NULL, PYTHON_API_VERSION);
+	if (m == NULL)
+		return;
+
+	PyOS_ReadlineFunctionPointer = call_readline;
+	setup_readline();
+}