Import readline 8.0

This imports readline 8.0.

readline/ChangeLog.gdb
2019-08-12  Tom Tromey  <tom@tromey.com>

	* Imported readline 8.0.

readline/macro.c

@@ -1,6 +1,6 @@
 /* macro.c -- keyboard macros for readline. */
 
-/* Copyright (C) 1994-2009 Free Software Foundation, Inc.
+/* Copyright (C) 1994-2009,2017 Free Software Foundation, Inc.
 
    This file is part of the GNU Readline Library (Readline), a library
    for reading lines of text with interactive input and history editing.      
@@ -49,6 +49,8 @@
 #include "rlprivate.h"
 #include "xmalloc.h"
 
+#define MAX_MACRO_LEVEL 16
+
 /* **************************************************************** */
 /*								    */
 /*			Hacking Keyboard Macros 		    */
@@ -83,13 +85,24 @@ struct saved_macro {
 /* The list of saved macros. */
 static struct saved_macro *macro_list = (struct saved_macro *)NULL;
 
+static int macro_level = 0;
+
 /* Set up to read subsequent input from STRING.
    STRING is free ()'ed when we are done with it. */
 void
-_rl_with_macro_input (string)
-     char *string;
+_rl_with_macro_input (char *string)
 {
-  _rl_push_executing_macro ();
+  if (macro_level > MAX_MACRO_LEVEL)
+    {
+      _rl_errmsg ("maximum macro execution nesting level exceeded");
+      _rl_abort_internal ();
+      return;
+    }
+
+#if 0
+  if (rl_executing_macro)		/* XXX - later */
+#endif
+    _rl_push_executing_macro ();
   rl_executing_macro = string;
   executing_macro_index = 0;
   RL_SETSTATE(RL_STATE_MACROINPUT);
@@ -98,7 +111,7 @@ _rl_with_macro_input (string)
 /* Return the next character available from a macro, or 0 if
    there are no macro characters. */
 int
-_rl_next_macro_key ()
+_rl_next_macro_key (void)
 {
   int c;
 
@@ -117,12 +130,26 @@ _rl_next_macro_key ()
       _rl_pop_executing_macro ();
   return c;
 #else
+  /* XXX - consider doing the same as the callback code, just not testing
+     whether we're running in callback mode */
   return (rl_executing_macro[executing_macro_index++]);
 #endif
 }
 
 int
-_rl_prev_macro_key ()
+_rl_peek_macro_key (void)
+{
+  if (rl_executing_macro == 0)
+    return (0);
+  if (rl_executing_macro[executing_macro_index] == 0 && (macro_list == 0 || macro_list->string == 0))
+    return (0);
+  if (rl_executing_macro[executing_macro_index] == 0 && macro_list && macro_list->string)
+    return (macro_list->string[0]);
+  return (rl_executing_macro[executing_macro_index]);
+}
+
+int
+_rl_prev_macro_key (void)
 {
   if (rl_executing_macro == 0)
     return (0);
@@ -136,7 +163,7 @@ _rl_prev_macro_key ()
 
 /* Save the currently executing macro on a stack of saved macros. */
 void
-_rl_push_executing_macro ()
+_rl_push_executing_macro (void)
 {
   struct saved_macro *saver;
 
@@ -146,12 +173,14 @@ _rl_push_executing_macro ()
   saver->string = rl_executing_macro;
 
   macro_list = saver;
+
+  macro_level++;
 }
 
 /* Discard the current macro, replacing it with the one
    on the top of the stack of saved macros. */
 void
-_rl_pop_executing_macro ()
+_rl_pop_executing_macro (void)
 {
   struct saved_macro *macro;
 
@@ -168,14 +197,15 @@ _rl_pop_executing_macro ()
       xfree (macro);
     }
 
+  macro_level--;
+
   if (rl_executing_macro == 0)
     RL_UNSETSTATE(RL_STATE_MACROINPUT);
 }
 
 /* Add a character to the macro being built. */
 void
-_rl_add_macro_char (c)
-     int c;
+_rl_add_macro_char (int c)
 {
   if (current_macro_index + 1 >= current_macro_size)
     {
@@ -190,7 +220,7 @@ _rl_add_macro_char (c)
 }
 
 void
-_rl_kill_kbd_macro ()
+_rl_kill_kbd_macro (void)
 {
   if (current_macro)
     {
@@ -213,8 +243,7 @@ _rl_kill_kbd_macro ()
    definition to the end of the existing macro, and start by
    re-executing the existing macro. */
 int
-rl_start_kbd_macro (ignore1, ignore2)
-     int ignore1, ignore2;
+rl_start_kbd_macro (int ignore1, int ignore2)
 {
   if (RL_ISSTATE (RL_STATE_MACRODEF))
     {
@@ -238,8 +267,7 @@ rl_start_kbd_macro (ignore1, ignore2)
    A numeric argument says to execute the macro right now,
    that many times, counting the definition as the first time. */
 int
-rl_end_kbd_macro (count, ignore)
-     int count, ignore;
+rl_end_kbd_macro (int count, int ignore)
 {
   if (RL_ISSTATE (RL_STATE_MACRODEF) == 0)
     {
@@ -258,8 +286,7 @@ rl_end_kbd_macro (count, ignore)
 /* Execute the most recently defined keyboard macro.
    COUNT says how many times to execute it. */
 int
-rl_call_last_kbd_macro (count, ignore)
-     int count, ignore;
+rl_call_last_kbd_macro (int count, int ignore)
 {
   if (current_macro == 0)
     _rl_abort_internal ();
@@ -277,8 +304,7 @@ rl_call_last_kbd_macro (count, ignore)
 }
 
 int
-rl_print_last_kbd_macro (count, ignore)
-     int count, ignore;
+rl_print_last_kbd_macro (int count, int ignore)
 {
   char *m;
 
@@ -300,8 +326,7 @@ rl_print_last_kbd_macro (count, ignore)
 }
 
 void
-rl_push_macro_input (macro)
-     char *macro;
+rl_push_macro_input (char *macro)
 {
   _rl_with_macro_input (macro);
 }