From 41e3953d2ca15e801fb6f84fe17145e8792d7ae3 Mon Sep 17 00:00:00 2001
From: Robbe Van Herck <robbevanherck1@gmail.com>
Date: Thu, 9 Jan 2020 16:53:06 +0100
Subject: [PATCH] Add newline and backspace

---
 kernel/drivers/keyboard/keycodes.c             |  3 +++
 kernel/drivers/keyboard/keymaps/DUMMY_azerty.c |  4 ++++
 kernel/terminal.c                              | 12 ++++++++++++
 3 files changed, 19 insertions(+)

diff --git a/kernel/drivers/keyboard/keycodes.c b/kernel/drivers/keyboard/keycodes.c
index 545dda1..c18d288 100644
--- a/kernel/drivers/keyboard/keycodes.c
+++ b/kernel/drivers/keyboard/keycodes.c
@@ -31,6 +31,9 @@ typedef enum keycode_enum {
 
     KEYCODE_SPACE = ' ',
 
+    KEYCODE_BACKSPACE = 0x08,
+    KEYCODE_NEWLINE = '\n',
+
     KEYCODE_SHIFT_UP,
     KEYCODE_SHIFT_DOWN,
     KEYCODE_CAPS_UP,
diff --git a/kernel/drivers/keyboard/keymaps/DUMMY_azerty.c b/kernel/drivers/keyboard/keymaps/DUMMY_azerty.c
index 1665995..6d9fa6d 100644
--- a/kernel/drivers/keyboard/keymaps/DUMMY_azerty.c
+++ b/kernel/drivers/keyboard/keymaps/DUMMY_azerty.c
@@ -72,6 +72,10 @@ keycode get_keycode(unsigned char scancode) {
         return KEYCODE_CAPS_DOWN;
     case 0xba:
         return KEYCODE_CAPS_UP;
+    case 0x0e:
+        return KEYCODE_BACKSPACE;
+    case 0x1c:
+        return KEYCODE_NEWLINE;
     default:
         return KEYCODE_UNKNOWN;
     }
diff --git a/kernel/terminal.c b/kernel/terminal.c
index 1b242f9..40e51e3 100644
--- a/kernel/terminal.c
+++ b/kernel/terminal.c
@@ -76,6 +76,18 @@ void terminal_putchar(char c) {
 		terminal_row++;
 		return;
 	}
+	if (c == 0x08) {
+		if (terminal_column == 0) {
+			if(terminal_row != 0) {
+				terminal_row--;
+				terminal_column = VGA_WIDTH - 1;
+			}
+		} else {
+			terminal_column--;
+		}
+		terminal_putentryat(' ', terminal_color, terminal_column, terminal_row);
+		return;
+	}
 
 	terminal_putentryat(c, terminal_color, terminal_column, terminal_row);
 	if (++terminal_column == VGA_WIDTH) {