int GetKey(keyboard_t *keyboard)
{
int key_pressed = 0;
do
{
KeyPoll(keyboard);
key_pressed = KeyGetPressed(keyboard);
} while (!key_pressed);
return key_pressed;
}
int main( int argc, char* argv[] )
{
sem_t *sem;
char sem_str[20];
char str[40]; // general purpose string
strcpy( sem_str, argv[1] );
sem = sem_open( sem_str, O_CREAT );
if ( sem == SEM_FAILED ) {
perror( "keypoll semaphore" );
exit(1);
}
CursorOff( sem );
sem_wait( sem );
sprintf( str, "\033[%d;%dH", 1, 1 );
write( OUT, str, strlen(str) );
sprintf( str, "Pick a character from the alphabet" );
write( OUT, str, strlen(str) );
sprintf( str, "\033[%d;%dH", 2, 2 );
write( OUT, str, strlen(str) );
sprintf( str, "5 seconds !!" );
write( OUT, str, strlen(str) );
sem_post( sem );
int i;
int j = 5;
char ch;
// increase keypoll sensitivity -- check 4 times a second
for ( i = 20; i > 0; i-- ) {
if ( (i % 5) == 0 ) {
PutChar( 2, 2, j + 48, sem );
j--;
}
usleep( USEC );
ch = KeyPoll();
if ( ch != ' ' && (int)ch > 64 && (int)ch < 123 ) {
if ( (int)ch > 90 ) {
ch = (char)((int)ch - 32); // make it a capital letter
}
break;
}
}
sprintf( str, "\033[%d;%dH", 2, 2 ); // will position cursor
if ( ch == ' ' ) {
// i'll pick for you
// be more random
srand( time(NULL) * getpid() );
ch = (char) (rand() % 26) + 64;
char sentence[40];
sprintf( sentence, "0 seconds !! I've picked for you:" );
sem_wait( sem );
write( OUT, str, strlen(str) ); // position cursor
write( OUT, sentence, strlen(sentence) );
sem_post( sem );
sprintf( str, "\033[%d;%dH", 2, (strlen(sentence) + 3) );
char space = ' ';
sem_wait( sem );
for ( i = 0; i < 15; i++ ) {
write( OUT, str, strlen(str) );
write( OUT, &space, 1 );
usleep( USEC * 2 );
write( OUT, str, strlen(str) );
write( OUT, &ch, 1 );
usleep( USEC * 2 );
}
sem_post( sem );
} else {
// you picked
char sentence[40];
sprintf( sentence, "0 seconds !! You've picked:" );
sem_wait( sem );
write( OUT, str, strlen(str) ); // position cursor
write( OUT, sentence, strlen(sentence) );
sem_post( sem );
sprintf( str, "\033[%d;%dH", 2, (strlen(sentence) + 3) );
char space = ' ';
sem_wait( sem );
for ( i = 0; i < 7; i++ ) {
write( OUT, str, strlen(str) );
write( OUT, &space, 1 );
usleep( USEC * 2 );
write( OUT, str, strlen(str) );
write( OUT, &ch, 1 );
usleep( USEC * 2 );
}
sem_post( sem );
}
usleep( USEC * 10 );
exit ((int)ch);
}
