From 467d85198ffb27a97ef21aa85c044a3ace19990a Mon Sep 17 00:00:00 2001
From: Tom Tromey <tromey@redhat.com>
Date: Tue, 27 Nov 2001 04:15:09 +0000
Subject: * NEWS: Updated. * event-loop.c (start_event_loop):
Call after_char_processing_hook. * event-top.h
(after_char_processing_hook): Declare. * event-top.c
(rl_callback_read_char_wrapper): Call after_char_processing_hook.
(after_char_processing_hook): New global. * top.c
(operate_saved_history): New global. (gdb_rl_operate_and_get_next): New
function. (init_main): Add the operate-and-get-next defun.
(gdb_rl_operate_and_get_next_completion): New function.
---
gdb/top.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 50 insertions(+)
(limited to 'gdb/top.c')
diff --git a/gdb/top.c b/gdb/top.c
index 7ddd3467216..3bffaf4efd4 100644
--- a/gdb/top.c
+++ b/gdb/top.c
@@ -1035,6 +1035,52 @@ init_signals (void)
#endif
}
+/* The current saved history number from operate-and-get-next.
+ This is -1 if not valid. */
+static int operate_saved_history = -1;
+
+/* This is put on the appropriate hook and helps operate-and-get-next
+ do its work. */
+void
+gdb_rl_operate_and_get_next_completion ()
+{
+ int delta = where_history () - operate_saved_history;
+ /* The `key' argument to rl_get_previous_history is ignored. */
+ rl_get_previous_history (delta, 0);
+ operate_saved_history = -1;
+
+ /* readline doesn't automatically update the display for us. */
+ rl_redisplay ();
+
+ after_char_processing_hook = NULL;
+ rl_pre_input_hook = NULL;
+}
+
+/* This is a gdb-local readline command handler. It accepts the
+ current command line (like RET does) and, if this command was taken
+ from the history, arranges for the next command in the history to
+ appear on the command line when the prompt returns.
+ We ignore the arguments. */
+static int
+gdb_rl_operate_and_get_next (int count, int key)
+{
+ if (event_loop_p)
+ {
+ /* Use the async hook. */
+ after_char_processing_hook = gdb_rl_operate_and_get_next_completion;
+ }
+ else
+ {
+ /* This hook only works correctly when we are using the
+ synchronous readline. */
+ rl_pre_input_hook = (Function *) gdb_rl_operate_and_get_next_completion;
+ }
+
+ /* Add 1 because we eventually want the next line. */
+ operate_saved_history = where_history () + 1;
+ return rl_newline (1, key);
+}
+
/* Read one line from the command input stream `instream'
into the local static buffer `linebuffer' (whose current length
is `linelength').
@@ -1880,6 +1926,10 @@ init_main (void)
rl_completer_quote_characters = get_gdb_completer_quote_characters ();
rl_readline_name = "gdb";
+ /* The name for this defun comes from Bash, where it originated.
+ 15 is Control-o, the same binding this function has in Bash. */
+ rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15);
+
/* The set prompt command is different depending whether or not the
async version is run. NOTE: this difference is going to
disappear as we make the event loop be the default engine of
--
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