Change rl_complete() and rl_list_possib() to be function pointers instead.

This is a much cleaner design and also works with or without the configure
--enable-default-complete option.

See the examples for details.

src/Makefile.am

@@ -6,4 +6,5 @@ libedit_a_SOURCES  = editline.c editline.h sysunix.c unix.h
 if COMPLETE
 # Built-in completion handler.
 libedit_a_SOURCES += complete.c
+AM_CPPFLAGS       = -DCOMPLETE
 endif

src/Makefile.in

@@ -161,6 +161,7 @@ AUTOMAKE_OPTIONS = foreign
 lib_LIBRARIES = libedit.a
 libedit_a_SOURCES = editline.c editline.h sysunix.c unix.h \
 	$(am__append_1)
+@COMPLETE_TRUE@AM_CPPFLAGS = -DCOMPLETE
 all: all-am
 
 .SUFFIXES:

src/complete.c

@@ -161,7 +161,7 @@ SplitPath(path, dirpart, filepart)
 **  Fill in *unique if we completed it, or set it to 0 if ambiguous.
 */
 char *
-rl_complete(pathname, unique)
+default_rl_complete(pathname, unique)
     char	*pathname;
     int		*unique;
 {
@@ -233,7 +233,7 @@ rl_complete(pathname, unique)
 **  Return all possible completions.
 */
 int
-rl_list_possib(pathname, avp)
+default_rl_list_possib(pathname, avp)
     char	*pathname;
     char	***avp;
 {

src/editline.c

@@ -97,6 +97,11 @@ STATIC int		TTYrows;
 /* Display print 8-bit chars as `M-x' or as the actual 8-bit char? */
 int		rl_meta_chars = 1;
 
+/* User definable callbacks. */
+char *(*rl_complete)(char *token, int *match); 
+int (*rl_list_possib)(char *token, char ***av);
+
+
 /*
 **  Declarations.
 */
@@ -1033,6 +1038,20 @@ rl_reset_terminal(p)
 void
 rl_initialize(void)
 {
+#ifdef COMPLETE
+    int done = 0;
+
+    if (!done)
+    {
+        if (!rl_complete)
+            rl_complete = &default_rl_complete;
+
+        if (!rl_list_possib)
+            rl_list_possib = &default_rl_list_possib;
+
+        done = 1;
+    }
+#endif
 }
 
 char *
@@ -1042,6 +1061,9 @@ readline(prompt)
     CHAR	*line;
     int		s;
 
+    /* Unless called by the user already. */
+    rl_initialize ();
+
     if (!isatty(0)) {
 	TTYflush();
 	return read_redirected();
@@ -1177,6 +1199,10 @@ c_possible(void)
     CHAR	*word;
     int		ac;
 
+    if (!rl_list_possib) {
+        return ring_bell();
+    }
+
     word = find_word();
     ac = rl_list_possib((char *)word, (char ***)&av);
     if (word)
@@ -1200,6 +1226,10 @@ c_complete(void)
     int		unique;
     STATUS	s;
 
+    if (!rl_complete) {
+        return ring_bell();
+    }
+
     word = find_word();
     p = (CHAR *)rl_complete((char *)word, &unique);
     if (word)

src/editline.h

@@ -2,6 +2,9 @@
 **
 **  Internal header file for editline library.
 */
+#ifndef __PRIVATE_EDITLINE_H__
+#define __PRIVATE_EDITLINE_H__
+
 #include <config.h>
 #include <stdio.h>
 #ifdef HAVE_MALLOC_H
@@ -70,8 +73,10 @@ extern int	rl_quit;
 #if	defined(DO_SIGTSTP)
 extern int	rl_susp;
 #endif	/* defined(DO_SIGTSTP) */
-extern char	*rl_complete();
-extern int	rl_list_possib(char *pathname, char ***avp);
+#ifdef COMPLETE
+extern char	*default_rl_complete();
+extern int	default_rl_list_possib(char *pathname, char ***avp);
+#endif
 extern void	rl_ttyset();
 extern void	rl_add_slash();
 
@@ -93,3 +98,6 @@ extern int	strncmp();
 #if	defined(NEED_STRDUP)
 extern char	*strdup();
 #endif
+
+#include "../include/editline.h"
+#endif  /* __PRIVATE_EDITLINE_H__ */