136 lines
1.9 KiB
C
136 lines
1.9 KiB
C
#include "input.h"
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#include <assert.h>
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#include <fcntl.h>
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#include <linux/input.h>
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#include <string.h>
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#include <unistd.h>
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enum {
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RELEASE = 0,
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PRESS = 1,
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REPEAT = 2,
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};
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input_state_t input;
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static int input_fd;
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static input_callback_t restart;
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static input_callback_t quit;
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static input_callback_t shoot;
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static input_callback_t pause_;
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static void key_press(int key)
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{
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switch (key) {
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case KEY_UP:
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++input.thrust;
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break;
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case KEY_LEFT:
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++input.spin;
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break;
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case KEY_RIGHT:
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--input.spin;
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break;
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case KEY_Q:
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if (quit != nullptr)
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quit();
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break;
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case KEY_R:
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if (restart != nullptr)
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restart();
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break;
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case KEY_SPACE:
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if (shoot != nullptr)
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shoot();
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break;
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case KEY_P:
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if (pause_ != nullptr)
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pause_();
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}
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}
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static void key_release(int key)
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{
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switch (key) {
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case KEY_UP:
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--input.thrust;
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break;
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case KEY_LEFT:
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--input.spin;
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break;
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case KEY_RIGHT:
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++input.spin;
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break;
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}
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}
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static void key_repeat(int key)
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{
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if (key == KEY_SPACE && shoot != nullptr)
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shoot();
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}
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int input_init()
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{
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memset(&input, 0, sizeof(input));
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shoot = restart = quit = pause_ = nullptr;
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input_fd = open("/dev/input/event0", O_RDONLY);
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assert(input_fd != -1);
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const int res = ioctl(input_fd, EVIOCGRAB, (void *)1);
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assert(res != -1);
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return input_fd;
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}
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void input_cleanup()
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{
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ioctl(input_fd, EVIOCGRAB, (void *)0);
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close(input_fd);
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}
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void input_on_shoot(input_callback_t cb)
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{
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shoot = cb;
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}
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void input_on_restart(input_callback_t cb)
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{
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restart = cb;
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}
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void input_on_quit(input_callback_t cb)
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{
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quit = cb;
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}
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void input_on_pause(input_callback_t cb)
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{
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pause_ = cb;
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}
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void input_handle()
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{
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struct input_event ev;
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const int len = read(input_fd, &ev, sizeof(ev));
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assert(len == sizeof(ev));
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if (ev.type == EV_KEY) {
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switch (ev.value) {
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case PRESS:
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key_press(ev.code);
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break;
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case RELEASE:
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key_release(ev.code);
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break;
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case REPEAT:
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key_repeat(ev.code);
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break;
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}
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}
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}
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