From 31b2f2c06d54232dad8461c9a3818246e5724439 Mon Sep 17 00:00:00 2001
From: Noah Swerhun <noah@noahsw.xyz>
Date: Sat, 18 Sep 2021 19:22:23 -0500
Subject: [PATCH] snake no longer turns back on itself

---
 nsnake     | Bin 18160 -> 18160 bytes
 obj/main.o | Bin 5136 -> 5168 bytes
 src/main.c |  22 +++++++++++++++++-----
 3 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/nsnake b/nsnake
index fe9d052297541330540cc5c28f575f58c4ff5580..6db3c59b30eb1e8ad2cee369721a1427e215a651 100755
GIT binary patch
delta 873
zcmYjPZAep57{2Gu>$aww4r3qaKHLT=Xdn31hvjw5UCF4(*{=wH^g*yJnDhaoVi{ay
zICv!%ElN!^f(&mztf=e*RzH&Zp_zaBKy0){YL?3uxA$%aJMf<8JnwtX^S<Z2XFf>g
zgXFG)C<pVY^cWNh$tk+1Z&c;=ddiotc1FIQp83FNcSkn~5!o8GVopU-Trj^wxKr50
zkV8<V^O8yE*VU4vFrzDV1^lzbR}*#3N^<cEq?E55DUqlZsmy0WN=tMtQrf3QDwC)(
z6qkqMIiWZKlis@V>^jWEM`Mf2qBwRLH{g0MDT-V-b8t0u1S#)I1pEm~)1`qEdSmXj
zKcW~bhmhW6iQ_?zcO|)iKS^~KaY2Svq$S5tjEZf634K#eA|;Bjpf#&k<XN%j;4<tw
zCeH}OP#~5On9SbPhN-x2SB&fSOmqAmMP}Wg;GTYzNrk`sCFOsXcJl?9D8+S+r%QR5
zt&|5T!vJZA8%DF*m>t+Eyf*d{^)QoF+ZE_2-chEq<AY2{X-+PQVjwB{3}ZIDmgeyr
ze4uZ*<fo*l6W$fuHyjTA(3n=({Vl=z+ZKvq+nV_)*3-=YWLsH2<>7)A5p?fsDf`O>
z5{lS}P+2lc_gjdg44<G8O@)@i`xsZb<oj=7!C@UBY&(Wqv9D1?AL3`kUc?66dJj>L
z&6-B^A|?^FE25~!#=k(^hFB#iZ9SyajUkFv7hIy9`MI)2I!}&G!%>WO6Mqr21P|;c
zvJ>9h&7=u_<9rbe4jZY1dWV^K;Q-Ey;78AS=ySN4Va(463yv>x7^ib!x`HEN!CE<z
zOG5CrYKYk2O!ayahFjG=hF8XPE^1Kvt~iWRos^o|4tr~Q$Rqev^Mv@IuU1DaaKF|~
kjsvMXN8E6s?mCGG*3I9QG?NEfXQeV+l2Hf?&CVg&KmGDq*Z=?k

delta 895
zcmYjPUr19?7(Zuox@GQ<P3D&KZf*lDoKWfvw78jhHLWDAC!-*um!JnnGZ<29(M^`Z
zXFWs`{we7t!`p+2q!c6}WIZI-Ly>4*aOlLWY02rk%WwzI{r&Fu=l6Z*J0}*Qu?T&t
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zV#`H31icm?t%6UMyu693IYnr}hJ-4_ghZtfEfO^n;Io}=-T5dZPRLnt#)j{r6}fJW
zF`->^ZPRrNU1C)<6pRu>cn@Q2fp!Y*RWT)P3Z;?96+Zr(F}YsRK^gMqRg)mj3!$h(
z3`Rx2JZ40rtVg#XVtgnVCw{YFjA+hj6CEUy<YrjTKAd9MU<{TsIlVpE_YE#s>m9p(
zB@|>-kQIf9CZ3ig&<Y={-0p>+O3+K}Ocq3A0@{fX9#6!7PL3}E&erF>j;(iYbu5TM
zS@h3sm8eKgIW5I(UDPzGNh&*v=Ym0Vd4boBBYdljqw5D_p*U-?4!iK=h8OQ}q(;R%
zt$5GFdX9UqfjdOViXnHMKUEj0m~;@rpR5t5`KB6im2c$5KTSfUa1_la>Iyb+mRfmA
zI%*$M!SQrQuY-ClI1CQA2KOI4vwrhmvHjnE$>Z#!{C;#d;{Ep{wjhonb|Km^^cmtR
z;tXOfo+OUAgpVK_pGp5ZW95iuN$2XId2VzOUT?gis?11LbE@rWctyB!aQEY5m|cMp
zcP`C`k8X~-U=6=#!Rm3*EU55sv=*B2I|V_soPi!swdN+))kw>p?`bfuN`aX|fd(X}
zcQBP+g7?J(lt61q5e>lOk`C)5TcQ?us61#~Hf$!7=*doKDD9y4;A`m^ZGax11+$*}
ns_7A+Wo^_ASIZvIR>`?<NvE1mhs;W^E@1zs5Rhsr2h@K7;yY%X

diff --git a/obj/main.o b/obj/main.o
index 712eeb3a4b4a94ee07a03535c6226a5eec569ed6..8be61bb1e5e3393ebcea6249ac9293a38be8134a 100644
GIT binary patch
delta 486
zcmYk0O-lkn7{`5P7Q=)4CbfDgwgOj8QjqiztrcRo@YJ<q-h%ehA(Dy?9cttG0$sf+
z+ZXU8ovcIOz#!QUc`Fj?8DD7s@C@^t|8JOat(N6laNJJaFnGmBR)iz`V9S-uvpzT*
z-AX@1@w0>>Crt<fO+xN05;B4Fgv`+ixxk3)&$+(j`hYoJ0|hU5#%pmEl&a9TW%Ziv
zM#Fr^>q*}LRqrX>4d+d9mm<-u(2Ra3$p+3>1Lp<oM2*B|pfv;S9uA`h><b4D(3FkD
zNx)17%yX>C23%oXPQnk~lNq0y7Fi<V(_-GRBd@~<hvZmOrz8Z*%vnQIF%r3HTON1+
zZ2@bF0k>XVsRG<#TP;Ef2dd3_9AEeXmNjd(ZD<xeV^g!?0SB7R;u5CyEtZkSVneqe
hhfUpvLmbfRVk&0C7uIQg$7alqd@7T-Pcg48{Q*BXhk5`2

delta 454
zcmYk0KT88a5XGI{7(C_fvKR0?n_!IOL_riGR$dMXqE&*eh1Ob_(#}eVmGHhm8as=`
z^E<>;YG)?_o1mZ;f`X{C`GfbC8Q#wOF}n@_oDY?o^Jjvta4iZ{!i&geTcxKF*7GzQ
z(nhfn+KjQ0Y_KCMw1Nw{z~ksvDzbAL2(8qq*f5ha6TK$Bh;mUk*-9?|=!})%n&tZb
z?Q2}`V(EE~YdBZvn6Br=(wSH~2W7dms2N&CXt`cFM&@JWE~-rKqh{r)izbsFgP-_J
zY3Zx3M|7+udV{iEZ*;J2O#`eUV<6<z9Hhlw_Ma+LZI=$Bn!QPMi2GE5reLT*TuQvl
zN$e?qXzR+S2HGm16Bte)J|(uDbup3Xfpy2H6xvQeMHuOTj<Ci30X6P7Xr}|?&hEc`
IjEc(q0c?DAK>z>%

diff --git a/src/main.c b/src/main.c
index 9b9a623..cb578fd 100644
--- a/src/main.c
+++ b/src/main.c
@@ -58,11 +58,23 @@ int main(void) {
 
         field_print(f);
         switch (c) {
-            case    up_key: dirn = UP;    break;
-            case  down_key: dirn = DOWN;  break;
-            case right_key: dirn = RIGHT; break;
-            case  left_key: dirn = LEFT;  break;
-            case  quit_key: goto quit;
+            case up_key:
+                if (dirn != DOWN)
+                    dirn = UP;
+            break;
+            case down_key:
+                if (dirn != UP)
+                    dirn = DOWN;
+            break;
+            case right_key:
+                if (dirn != LEFT)
+                    dirn = RIGHT;
+            break;
+            case left_key:
+                if (dirn != RIGHT)
+                    dirn = LEFT;
+            break;
+            case quit_key: goto quit;
         }
         snake_forward(s, dirn);
         snake_print(s);