2bt/vmTetris

getchar does not read input

Closed this issue · 4 comments

Lithrein commented

I've not been able to fix it but your tetris is unplaybable because there is no way to interact with the program. The problem is caused by the extern call stty cbreak -echo min 0 which causes getchar to never read anything. I've tried to change it to stty cbreak -echo min 1 time 0 but it causes the program to hang. I've also tried to hardcode a stream of input values ([27, 91, 65] (↑), etc.) but the only value which does not cause the program to hang is -1 (ie, no input).

2bt commented

Thanks for the report. You've got to believe me this used to work great. Something must have changed with getchar() – it just won't unblock anymore. :(

I found a fix, just add the following to main.c:

int getchar() {
    char c;
    if (read(0, &c, 1) == 1) return c;
    return -1;
}

Alas, the code is not so pretty anymore. I shall see what I can do about that.

Lithrein commented

Thank you! Indeed the shape is not as good as a before. Maybe, you can shape it in the form of a tetromino.

m[444],c,x;g(c){return!!read(0,&c,1)?c:-1;}main(o,a){for(system("stty cbreak   \
-echo min 0"),srand(a);o=f();o<42?a=(x=o/2%7)<3?x:x<4?f():x<5?m[f()<23?x:m[x-23]
]:x<6?g():rand()%f(),m[x=o%2?f():m[6]++]*=o<28,a=m[x]+=o>13?a:-a:o<45?putchar(o%
3?o%2*75+f():a):o<63?f(),c=!a^o/54?x+o%9*75:c:usleep(20000));system("stty sane")
;}f(){return x=c++["NCRM7@BD;527e4R37Q<Q9M27e@Q:OQ9MQ9Q;MQ9OMQ;Q9B7MQEQ:Q:OM27e\
^MQEMQ:OQ8KMQEOQ8OMQDMKQ:OMMQDQ:OQ:P7KMQ;OQ:Q927fDP7MMQ8MQ;Q:27fSRE5RE<Q6D952<f\
fR;<Q62<fr[JZ?[a[y`NT=>T?@LD2C^bT<7V<@<gC6K7bn6U7g^68?^^D;?27gjD:=NDTBC27gp@=27\
gv2=P8RE5RF<R;;TL747hB47K25T=9D;9859_lTA:F?:T=9R26FQ9859_lF59@:26hY`?B7`;RI98=9\
bn>D`3N8T@?T>=gxS825=2;h6252<h328k:RI=X66DM6R:9T6AF6A29i]X2?T?9F9?F9?RE5RE<TL7=\
27bn2<ivR[5RD<=R9;R97N98L9jM27=2;jD>7k6T5;L558a[25C9T;5>/jl2BT5;T576:7SN456F7jo\
T;52<j=[JZ?[j[wR[5RD<R;;[JZ?[cTL7D_7YZQ[O[O=2;kK25[92<kHn^7[JZ?ZQR35TL9l525kw=2\
5C_Y25l6[9/"]-47;}/************************************************************/
2bt commented

Yes, thanks. I think I will take some time later to work it in nicely.

2bt commented

I actually got it one byte shorter in the end. :)

I also added snake, merely by replacing that string literal.

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