/*

* Copyright (C) 2012 The Chromium OS Authors <chromium-os-dev@chromium.org>

*

* Permission is hereby granted, free of charge, to any person obtaining a

* copy of this software and associated documentation files (the "Software"),

* to deal in the Software without restriction, including without limitation

* the rights to use, copy, modify, merge, publish, distribute, sublicense,

* and/or sell copies of the Software, and to permit persons to whom the

* Software is furnished to do so, subject to the following conditions:

*

* The above copyright notice and this permission notice shall be included in

* all copies or substantial portions of the Software.

*

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

* IN THE SOFTWARE.

*/

#include <stdio.h>

#include <unistd.h>

#include <linux/input.h>

#include <X11/extensions/XKBcommon.h>

struct xkb_desc *create_xkb(void) {

struct xkb_rule_names names;

names.rules = "evdev";

names.model = "pc105";

names.layout = "us";

names.variant = "";

names.options = "";

return xkb_compile_keymap_from_rules(&names);

}

void handle_key(struct xkb_desc *xkb,

struct input_event *evp,

uint32_t *modifiers)

{

uint32_t code = evp->code + xkb->min_key_code;

uint32_t level = 0;

uint32_t sym;

if ((*modifiers & XKB_COMMON_SHIFT_MASK) &&

XkbKeyGroupWidth(xkb, code, 0) > 1)

level = 1;

sym = XkbKeySymEntry(xkb, code, level, 0);

if (evp->value)

*modifiers |= xkb->map->modmap[code];

else

*modifiers &= xkb->map->modmap[code];

printf("Code: %d, Sym: %d, Modifiers: %d, Ascii: %c, State: %s\n",

evp->code, sym, *modifiers, sym,

evp->value ? "up" : "down");

}

int main(int argc, char *argv[])

{

struct input_event ev;

struct xkb_desc *xkb;

uint32_t modifiers;

ssize_t bytes;

int i;

xkb = create_xkb();

if (!xkb) {

fprintf(stderr, "Failed to compile keymap\n");

return 1;

}

while (1) {

bytes = read(0, &ev, sizeof(ev));

if (bytes != sizeof(ev))

break;

if (EV_KEY == ev.type)

handle_key(xkb, &ev, &modifiers);

}

return 0;

}