From 2aebb209beb8aae5249fdbc63c05a9639a1344bf Mon Sep 17 00:00:00 2001
From: AtieP <nosequiensoy8664@gmail.com>
Date: Sun, 10 Apr 2022 14:07:37 +0200
Subject: [PATCH] [readline] Add TAB support

Signed-off-by: AtieP <nosequiensoy8664@gmail.com>

This commit adds TAB support, so when you're typing a command and you press TAB, similar commands are shown.
---
 src/hci/readline.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/src/hci/readline.c b/src/hci/readline.c
index ecc72d43f..dc60cdd21 100644
--- a/src/hci/readline.c
+++ b/src/hci/readline.c
@@ -27,6 +27,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 #include <string.h>
 #include <stdlib.h>
 #include <errno.h>
+#include <ipxe/command.h>
 #include <ipxe/console.h>
 #include <ipxe/keys.h>
 #include <ipxe/editstring.h>
@@ -324,6 +325,38 @@ int readline_history ( const char *prompt, const char *prefill,
 		case KEY_DOWN:
 			move_by = -1;
 			break;
+		case TAB: {
+			int new_line_printed, matches_found;
+			struct command *cmd;
+			new_line_printed = matches_found = 0;
+
+			for_each_table_entry ( cmd, COMMANDS ) {
+				if ( strncmp ( buf, cmd->name, strlen ( buf ) ) == 0 ) {
+					if ( !new_line_printed) {
+						printf("\n");
+						new_line_printed = 1;
+						matches_found = 1;
+					}
+					printf ( "%s ", cmd->name );
+				}
+			}
+
+			if ( matches_found ) {
+				printf ( "\n" );
+
+				/* Printing the prompt and creating a new editstring to print
+				   the already typed command */
+
+				if ( prompt )
+					printf ( "%s", prompt );
+
+				memset ( &string, 0, sizeof ( string ) );
+				init_editstring ( &string, buf, READLINE_MAX );
+				replace_string ( &string, buf );
+				sync_console ( &string );
+			}
+			continue;
+		}
 		default:
 			/* Do nothing */
 			break;