keymap.c File Reference

Keyboard mappings. More...

#include <string.h>
#include <ctype.h>
#include <ipxe/keys.h>
#include <ipxe/keymap.h>

Go to the source code of this file.

Macros
#define	ASCII_MASK   0x7f
	ASCII character mask. More...
#define	CTRL_MASK   0x1f
	Control character mask. More...
#define	UPPER_MASK   0x5f
	Upper case character mask. More...
#define	CASE_TOGGLE   ( ASCII_MASK & ~UPPER_MASK )
	Case toggle bit. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static	TABLE_START (keymap_start, KEYMAP)
	Default keyboard mapping. More...
unsigned int	key_remap (unsigned int character)
	Remap a key. More...
struct keymap *	keymap_find (const char *name)
	Find keyboard map by name. More...
void	keymap_set (struct keymap *keymap)
	Set keyboard map. More...

Variables
static struct keymap *	keymap_current = keymap_start
	Current keyboard mapping. More...

Detailed Description

Keyboard mappings.

Definition in file keymap.c.

Macro Definition Documentation

ASCII_MASK

#define ASCII_MASK   0x7f

ASCII character mask.

Definition at line 38 of file keymap.c.

CTRL_MASK

#define CTRL_MASK   0x1f

Control character mask.

Definition at line 41 of file keymap.c.

UPPER_MASK

#define UPPER_MASK   0x5f

Upper case character mask.

Definition at line 44 of file keymap.c.

CASE_TOGGLE

#define CASE_TOGGLE   ( ASCII_MASK & ~UPPER_MASK )

Case toggle bit.

Definition at line 47 of file keymap.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

TABLE_START()

static TABLE_START ( keymap_start  , KEYMAP    )

static

Default keyboard mapping.

key_remap()

unsigned int key_remap

(

unsigned int

character

)

Remap a key.

Parameters

character

Character read from console

Return values

mapped

Mapped character

Definition at line 61 of file keymap.c.

                                                  {
        struct keymap *keymap = keymap_current;
        unsigned int mapped = ( character & KEYMAP_MASK );
        struct keymap_key *key;

        /* Invert case before remapping if applicable */
        if ( ( character & KEYMAP_CAPSLOCK_UNDO ) && isalpha ( mapped ) )
                mapped ^= CASE_TOGGLE;

        /* Select remapping table */
        key = ( ( character & KEYMAP_ALTGR ) ? keymap->altgr : keymap->basic );

        /* Remap via table */
        for ( ; key->from ; key++ ) {
                if ( mapped == key->from ) {
                        mapped = key->to;
                        break;
                }
        }

        /* Handle Ctrl-<key> and CapsLock */
        if ( isalpha ( mapped ) ) {
                if ( character & KEYMAP_CTRL ) {
                        mapped &= CTRL_MASK;
                } else if ( character & KEYMAP_CAPSLOCK ) {
                        mapped ^= CASE_TOGGLE;
                }
        }

        /* Clear flags */
        mapped &= ASCII_MASK;

        DBGC2 ( &keymap_current, "KEYMAP mapped %04x => %02x\n",
                character, mapped );
        return mapped;
}

References keymap::altgr, ASCII_MASK, keymap::basic, CASE_TOGGLE, CTRL_MASK, DBGC2, isalpha(), key, KEYMAP_ALTGR, KEYMAP_CAPSLOCK, KEYMAP_CAPSLOCK_UNDO, KEYMAP_CTRL, keymap_current, and KEYMAP_MASK.

Referenced by bios_getchar(), efi_getchar(), and usbkbd_map().

keymap_find()

struct keymap* keymap_find

(

const char *

name

)

Find keyboard map by name.

Parameters

name	Keyboard map name

Return values

keymap

Keyboard map, or NULL if not found

Definition at line 104 of file keymap.c.

                                                 {
        struct keymap *keymap;

        /* Find matching keyboard map */
        for_each_table_entry ( keymap, KEYMAP ) {
                if ( strcmp ( keymap->name, name ) == 0 )
                        return keymap;
        }

        return NULL;
}

References for_each_table_entry, KEYMAP, keymap::name, name, NULL, and strcmp().

Referenced by keymap_apply().

keymap_set()

void keymap_set

(

struct keymap *

keymap

)

Set keyboard map.

Parameters

keymap

Keyboard map, or NULL to use default

Definition at line 121 of file keymap.c.

                                          {

        /* Use default keymap if none specified */
        if ( ! keymap )
                keymap = keymap_start;

        /* Set new keyboard map */
        if ( keymap != keymap_current )
                DBGC ( &keymap_current, "KEYMAP using \"%s\"\n", keymap->name );
        keymap_current = keymap;
}

References DBGC, keymap_current, and keymap::name.

Referenced by keymap_apply().

Variable Documentation

keymap_current

struct keymap* keymap_current = keymap_start

static

Current keyboard mapping.

Definition at line 53 of file keymap.c.

Referenced by key_remap(), and keymap_set().