mirror of
https://github.com/libretro/RetroArch.git
synced 2024-12-02 21:37:14 +00:00
0ae7ffe0d3
== DETAILS - the free() method of the hid_driver_t interface needs its parameter defined as const in order for the compiler to stop complaining about losing const-ness. - if a joypad list is created with <MAX_USERS slots in it, the destroy() function will crash because it assumes there are MAX_USERS entries. To do this, the allocate function creates n+1 slots, and gives the last slot a canary value that the destroy() method can then watch for when iterating through the list.
108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/* RetroArch - A frontend for libretro.
|
|
* Copyright (C) 2013-2014 - Jason Fetters
|
|
* Copyright (C) 2011-2017 - Daniel De Matteis
|
|
*
|
|
* RetroArch is free software: you can redistribute it and/or modify it under the terms
|
|
* of the GNU General Public License as published by the Free Software Found-
|
|
* ation, either version 3 of the License, or (at your option) any later version.
|
|
*
|
|
* RetroArch 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with RetroArch.
|
|
* If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "../input_defines.h"
|
|
#include "../input_driver.h"
|
|
|
|
typedef struct null_hid
|
|
{
|
|
void *empty;
|
|
} null_hid_t;
|
|
|
|
static bool null_hid_joypad_query(void *data, unsigned pad)
|
|
{
|
|
return pad < MAX_USERS;
|
|
}
|
|
|
|
static const char *null_hid_joypad_name(void *data, unsigned pad)
|
|
{
|
|
/* TODO/FIXME - implement properly */
|
|
if (pad >= MAX_USERS)
|
|
return NULL;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void null_hid_joypad_get_buttons(void *data, unsigned port, retro_bits_t *state)
|
|
{
|
|
(void)data;
|
|
(void)port;
|
|
|
|
BIT256_CLEAR_ALL_PTR(state);
|
|
}
|
|
|
|
static bool null_hid_joypad_button(void *data, unsigned port, uint16_t joykey)
|
|
{
|
|
(void)data;
|
|
(void)port;
|
|
(void)joykey;
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool null_hid_joypad_rumble(void *data, unsigned pad,
|
|
enum retro_rumble_effect effect, uint16_t strength)
|
|
{
|
|
(void)data;
|
|
(void)pad;
|
|
(void)effect;
|
|
(void)strength;
|
|
|
|
return false;
|
|
}
|
|
|
|
static int16_t null_hid_joypad_axis(void *data, unsigned port, uint32_t joyaxis)
|
|
{
|
|
(void)data;
|
|
(void)port;
|
|
(void)joyaxis;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void *null_hid_init(void)
|
|
{
|
|
return (null_hid_t*)calloc(1, sizeof(null_hid_t));
|
|
}
|
|
|
|
static void null_hid_free(const void *data)
|
|
{
|
|
null_hid_t *hid_null = (null_hid_t*)data;
|
|
|
|
if (hid_null)
|
|
free(hid_null);
|
|
}
|
|
|
|
static void null_hid_poll(void *data)
|
|
{
|
|
(void)data;
|
|
}
|
|
|
|
hid_driver_t null_hid = {
|
|
null_hid_init,
|
|
null_hid_joypad_query,
|
|
null_hid_free,
|
|
null_hid_joypad_button,
|
|
null_hid_joypad_get_buttons,
|
|
null_hid_joypad_axis,
|
|
null_hid_poll,
|
|
null_hid_joypad_rumble,
|
|
null_hid_joypad_name,
|
|
"null",
|
|
};
|