Key definitions

src/include/gpxe/keys.h

@@ -0,0 +1,78 @@
+#ifndef _GPXE_KEYS_H
+#define _GPXE_KEYS_H
+
+/** @file
+ *
+ * Key definitions
+ *
+ */
+
+/*
+ * Symbolic names for some standard ASCII characters
+ *
+ */
+
+#define NUL		0x00
+#define CTRL_A		0x01
+#define CTRL_B		0x02
+#define CTRL_C		0x03
+#define CTRL_D		0x04
+#define CTRL_E		0x05
+#define CTRL_F		0x06
+#define CTRL_G		0x07
+#define CTRL_H		0x08
+#define CTRL_I		0x09
+#define CTRL_J		0x0a
+#define CTRL_K		0x0b
+#define CTRL_L		0x0c
+#define CTRL_M		0x0d
+#define CTRL_N		0x0e
+#define CTRL_O		0x0f
+#define CTRL_P		0x10
+#define CTRL_Q		0x11
+#define CTRL_R		0x12
+#define CTRL_S		0x13
+#define CTRL_T		0x14
+#define CTRL_U		0x15
+#define CTRL_V		0x16
+#define CTRL_W		0x17
+#define CTRL_X		0x18
+#define CTRL_Y		0x19
+#define CTRL_Z		0x1a
+
+#define BACKSPACE	CTRL_H
+#define TAB		CTRL_I
+#define ENTER		CTRL_M
+#define ESC		0x1b
+
+/*
+ * Special keys outside the normal ASCII range 
+ *
+ *
+ * These values are chosen to facilitate easy conversion from a
+ * received ANSI escape sequence to a KEY_XXX constant.  The KEY_XXX
+ * constant is simply 0x100 plus the first byte following CSI in the
+ * ANSI escape sequence.  For example, KEY_LEFT is 0x144, since a left
+ * cursor key is transmitted as the ANSI sequence "^[[D".
+ */
+
+#define KEY_ANSI( character ) ( 0x100 + (character) )
+
+#define KEY_MIN		0x101
+#define KEY_UP		KEY_ANSI ( 'A' )
+#define KEY_DOWN	KEY_ANSI ( 'B' )
+#define KEY_RIGHT	KEY_ANSI ( 'C' )
+#define KEY_LEFT	KEY_ANSI ( 'D' )
+#define KEY_END		KEY_ANSI ( 'E' )
+#define KEY_HOME	KEY_ANSI ( 'H' )
+#define KEY_PPAGE	KEY_ANSI ( '5' )
+#define KEY_NPAGE	KEY_ANSI ( '6' )
+#define KEY_MAX		0x1ff
+
+/* Not in the [KEY_MIN,KEY_MAX] range; terminals seem to send these as
+ * normal ASCII values.
+ */
+#define KEY_BACKSPACE	BACKSPACE
+#define KEY_ENTER	ENTER
+
+#endif /* _GPXE_KEYS_H */