libvirt/src/util/virkeycode.c

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/*
* Copyright (c) 2011 Lai Jiangshan
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include <config.h>
#include "virkeycode.h"
#include <string.h>
#include <stddef.h>
#define getfield(object, field_type, field_offset) \
(*(typeof(field_type) *)((char *)(object) + field_offset))
struct keycode {
const char *linux_name;
const char *os_x_name;
const char *win32_name;
unsigned short linux_keycode;
unsigned short os_x;
unsigned short atset1;
unsigned short atset2;
unsigned short atset3;
unsigned short xt;
unsigned short xt_kbd;
unsigned short usb;
unsigned short win32;
unsigned short rfb;
};
#define VIRT_KEY_INTERNAL
#include "virkeymaps.h"
static unsigned int codeOffset[] = {
[VIR_KEYCODE_SET_LINUX] =
offsetof(struct keycode, linux_keycode),
[VIR_KEYCODE_SET_XT] =
offsetof(struct keycode, xt),
[VIR_KEYCODE_SET_ATSET1] =
offsetof(struct keycode, atset1),
[VIR_KEYCODE_SET_ATSET2] =
offsetof(struct keycode, atset2),
[VIR_KEYCODE_SET_ATSET3] =
offsetof(struct keycode, atset3),
[VIR_KEYCODE_SET_OSX] =
offsetof(struct keycode, os_x),
[VIR_KEYCODE_SET_XT_KBD] =
offsetof(struct keycode, xt_kbd),
[VIR_KEYCODE_SET_USB] =
offsetof(struct keycode, usb),
[VIR_KEYCODE_SET_WIN32] =
offsetof(struct keycode, win32),
[VIR_KEYCODE_SET_RFB] =
offsetof(struct keycode, rfb),
};
verify(ARRAY_CARDINALITY(codeOffset) == VIR_KEYCODE_SET_LAST);
VIR_ENUM_IMPL(virKeycodeSet, VIR_KEYCODE_SET_LAST,
"linux",
"xt",
"atset1",
"atset2",
"atset3",
"os_x",
"xt_kbd",
"usb",
"win32",
"rfb",
);
static int __virKeycodeValueFromString(unsigned int name_offset,
unsigned int code_offset,
const char *keyname)
{
int i;
for (i = 0; i < ARRAY_CARDINALITY(virKeycodes); i++) {
const char *name = getfield(virKeycodes + i, const char *, name_offset);
if (name && STREQ(name, keyname))
return getfield(virKeycodes + i, unsigned short, code_offset);
}
return -1;
}
int virKeycodeValueFromString(virKeycodeSet codeset, const char *keyname)
{
switch (codeset) {
case VIR_KEYCODE_SET_LINUX:
return __virKeycodeValueFromString(offsetof(struct keycode, linux_name),
offsetof(struct keycode, linux_keycode),
keyname);
case VIR_KEYCODE_SET_OSX:
return __virKeycodeValueFromString(offsetof(struct keycode, os_x_name),
offsetof(struct keycode, os_x),
keyname);
case VIR_KEYCODE_SET_WIN32:
return __virKeycodeValueFromString(offsetof(struct keycode, win32_name),
offsetof(struct keycode, win32),
keyname);
default:
return -1;
}
}
static int __virKeycodeValueTranslate(unsigned int from_offset,
unsigned int to_offset,
int key_value)
{
int i;
for (i = 0; i < ARRAY_CARDINALITY(virKeycodes); i++) {
if (getfield(virKeycodes + i, unsigned short, from_offset) == key_value)
return getfield(virKeycodes + i, unsigned short, to_offset);
}
return -1;
}
int virKeycodeValueTranslate(virKeycodeSet from_codeset,
virKeycodeSet to_codeset,
int key_value)
{
if (key_value <= 0)
return -1;
key_value = __virKeycodeValueTranslate(codeOffset[from_codeset],
codeOffset[to_codeset],
key_value);
if (key_value <= 0)
return -1;
return key_value;
}