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/* gameplaySP
*
* Copyright (C) 2006 Exophase <exophase@gmail.com>
*
* This program 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 Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "common.h"
static u32 old_key = 0;
static retro_input_state_t input_state_cb;
void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
void trigger_key(u32 key)
{
u32 p1_cnt = io_registers[REG_P1CNT];
if((p1_cnt >> 14) & 0x01)
{
u32 key_intersection = (p1_cnt & key) & 0x3FF;
if(p1_cnt >> 15)
{
if(key_intersection == (p1_cnt & 0x3FF))
raise_interrupt(IRQ_KEYPAD);
}
else
{
if(key_intersection)
raise_interrupt(IRQ_KEYPAD);
}
}
}
u32 update_input(void)
{
unsigned i;
uint32_t new_key = 0;
if (!input_state_cb)
return 0;
for (i = 0; i < sizeof(btn_map) / sizeof(map); i++)
new_key |= input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, btn_map[i].retropad) ? btn_map[i].gba : 0;
if ((new_key | old_key) != old_key)
trigger_key(new_key);
old_key = new_key;
io_registers[REG_P1] = (~old_key) & 0x3FF;
return 0;
}
#define input_savestate_builder(type) \
void input_##type##_savestate(void) \
{ \
state_mem_##type##_variable(old_key); \
}
input_savestate_builder(read)
input_savestate_builder(write)
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