123 lines
2.6 KiB
C
123 lines
2.6 KiB
C
|
/* The readline module makes GNU readline available to Python. It
|
||
|
|
* has ideas contributed by Lee Busby, LLNL, and William Magro,
|
||
|
|
* Cornell Theory Center.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include "Python.h"
|
||
|
|
#include <setjmp.h>
|
||
|
|
#include <signal.h>
|
||
|
|
|
||
|
|
/* Routines needed from outside (but not declared in a header file). */
|
||
|
|
extern int (*Py_input_hook)();
|
||
|
|
extern char *readline();
|
||
|
|
extern int rl_initialize();
|
||
|
|
extern int rl_insert();
|
||
|
|
extern int rl_bind_key();
|
||
|
|
extern void add_history();
|
||
|
|
extern char *rl_readline_name;
|
||
|
|
extern int (*rl_event_hook)();
|
||
|
|
extern char *(*PyOS_ReadlineFunctionPointer) Py_PROTO((char *));
|
||
|
|
|
||
|
|
/* This module's initialization routine */
|
||
|
|
void initreadline (void);
|
||
|
|
|
||
|
|
static void PyOS_ReadlineInit();
|
||
|
|
static RETSIGTYPE onintr();
|
||
|
|
static char *PyOS_GnuReadline();
|
||
|
|
static jmp_buf jbuf;
|
||
|
|
static PyObject *ReadlineError;
|
||
|
|
static int already_initialized = 0;
|
||
|
|
static char readline_module_documentation[] =
|
||
|
|
"Readline Module, version0.0"
|
||
|
|
;
|
||
|
|
|
||
|
|
static struct PyMethodDef readline_methods[] =
|
||
|
|
{
|
||
|
|
{ 0, 0 }
|
||
|
|
};
|
||
|
|
|
||
|
|
/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% */
|
||
|
|
|
||
|
|
/* Initialize the module. Actually, that's all you can or need to do. */
|
||
|
|
void initreadline (void)
|
||
|
|
{
|
||
|
|
PyObject *m, *d;
|
||
|
|
|
||
|
|
if (already_initialized)
|
||
|
|
return;
|
||
|
|
m = Py_InitModule4 ("readline", readline_methods,
|
||
|
|
readline_module_documentation,
|
||
|
|
(PyObject *) 0, PYTHON_API_VERSION);
|
||
|
|
d = PyModule_GetDict (m);
|
||
|
|
ReadlineError = PyString_FromString ("Readline.error");
|
||
|
|
PyDict_SetItemString (d, "error", ReadlineError);
|
||
|
|
if (PyErr_Occurred ()) {
|
||
|
|
Py_FatalError ("Cannot initialize module readline");
|
||
|
|
}
|
||
|
|
if (isatty(fileno(stdin))){
|
||
|
|
PyOS_ReadlineFunctionPointer = PyOS_GnuReadline;
|
||
|
|
PyOS_ReadlineInit();
|
||
|
|
}
|
||
|
|
already_initialized = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ARGSUSED */
|
||
|
|
static RETSIGTYPE
|
||
|
|
onintr(sig)
|
||
|
|
int sig;
|
||
|
|
{
|
||
|
|
longjmp(jbuf, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
PyOS_ReadlineInit()
|
||
|
|
{
|
||
|
|
/* Force rebind of TAB to insert-tab */
|
||
|
|
rl_readline_name = "python";
|
||
|
|
rl_initialize();
|
||
|
|
rl_bind_key('\t', rl_insert);
|
||
|
|
}
|
||
|
|
|
||
|
|
static char *
|
||
|
|
PyOS_GnuReadline(prompt)
|
||
|
|
char *prompt;
|
||
|
|
{
|
||
|
|
int n;
|
||
|
|
char *p;
|
||
|
|
RETSIGTYPE (*old_inthandler)();
|
||
|
|
old_inthandler = signal(SIGINT, onintr);
|
||
|
|
if (setjmp(jbuf)) {
|
||
|
|
#ifdef HAVE_SIGRELSE
|
||
|
|
/* This seems necessary on SunOS 4.1 (Rasmus Hahn) */
|
||
|
|
sigrelse(SIGINT);
|
||
|
|
#endif
|
||
|
|
signal(SIGINT, old_inthandler);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
rl_event_hook = Py_input_hook;
|
||
|
|
p = readline(prompt);
|
||
|
|
signal(SIGINT, old_inthandler);
|
||
|
|
if (p == NULL) {
|
||
|
|
p = malloc(1);
|
||
|
|
if (p != NULL)
|
||
|
|
*p = '\0';
|
||
|
|
return p;
|
||
|
|
}
|
||
|
|
n = strlen(p);
|
||
|
|
if (n > 0)
|
||
|
|
add_history(p);
|
||
|
|
if ((p = realloc(p, n+2)) != NULL) {
|
||
|
|
p[n] = '\n';
|
||
|
|
p[n+1] = '\0';
|
||
|
|
}
|
||
|
|
return p;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|