From ec320340d954ffb5265524ba2101eac041cd8aef Mon Sep 17 00:00:00 2001
From: AfonsoCMSousa <afonsoclerigomendessousa@gmail.com>
Date: Thu, 20 Mar 2025 20:36:06 +0000
Subject: [PATCH] Read Input (up,right,down,left). Error: Segmentaion fault to
 fix...

---
 bin/main     | Bin 33656 -> 33848 bytes
 src/main.asm |  72 +++++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 67 insertions(+), 5 deletions(-)

diff --git a/bin/main b/bin/main
index 579c55695fcdc4653f92094357fc2024f227e38d..1cdc1c553acb43d4c84f031cd8c3815579b0bfa4 100755
GIT binary patch
delta 1160
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zgq7WVvWK903Vmp3t{y5W=s{>oL~kZNq!f`vC_=8^*}gAbxI5p^@BGd=m)*ND%x7=%
zyU9F99b*z>Oc6hHImVWkB&YdCYNp>TF7sNe*~ib9m(kqy7-O%gZztt;(M(qfZcgK2
zbD7KbXXAg5ooKEddh{nS)qj6miP>%`kQ{NpCF$JWR=wCddT`x*Usn-L(oU_TwmUR5
zB&@XDojYTjCbc-`^rKD2nLSLmi$T)!sjr7-z86xsB7&$~79oqmfC$)R<s<FXI+Ao(
zFTTtco38(M4{c_J#ez=iYe<MEU72E0Iw&>QGPLQ<jVY;AYSzLSe?@c5Jz7&moiFHS
zxi-U9N}({^|6hY$G>Dx<11EHZ%M8~h6&mzn!?i}CQ7<)ID-@b^np&c8POn%kprf{O
zJ}_3!R&zwQy``B|o{k9-*SAE+l!!mJ%#r%jlEZvguZn*tJHBA~<&1x^e74#pndMW7
ziHEST#DJM+6h#vQqQuy7x_3*AyYY5U!Ci189Dy&u_uvkA0`7(%!zw%p4`&?ZGboIq
z;T!w_zEq$2+@8QPJPG%~&*3mU2OID_d<*`Rc9ijP6uycAy;62IbKuX6xfR}kcfjHu
zQa|4Xix(_xhY!Jf;Yzpwb_z#n!2uN9Xefp+!ey`*J_2iSC2YV|@NM`c{1C2zpOW{9
zC$2>yE*j{oaheN*Mf44=4R)G0VtHm;Y`?eH6OzLrpC$*CE|2b4g0iZFn5y}Mx~%&H
zJ{DBupf3{e2h-7`X-b4$Q~G^!Sj~)HB@)ae&EM0jXJWwDt&63;P?twFCt~x(=|lWM
PHB5EvcUAFdUWV%*gcRyE

delta 822
zcmZ9~&ubGw6bJCPvkh%kH0cj4Yik9oDD<ba1Y4Ul{y-xM7D4eKtZ5tCEnySl7WGh5
zwjfmqC`0k?T|7k4UWAGG;~+NnuC@m;kbgkE)Hm+;<iO0l&zqOWWOrY$iC+)I<61<;
zhzuh7$x{#YWaqmPmCCrtYpbxuT~jWKtH*lyti>lPaPeM_r*$z83sdmkEq8<+zA|wA
zo9Y~k$+sV0Y{{oD<+RylsET9O#^tuT)|?*MN|k$Zaw>Lw{sMPPl|#+EB{rJ4#krL;
z?d0|A&F}^r)}?ajFdrsQSC=Naa6iX&m+KlsteOrEaqvM0Z5+JUK`RG8bby}qN%<yb
zSyfIYHuOE~2YE^ER+FoL<_`F`cICtPgrVfSc){3H`C=}NSGLXBP}s1kjSETt#3Z#W
zBP+cnwX9P_13dXQqK4-eg&Xi$_+&hIzL()s@HKb>w&C-z{*$_Y8on2}ByJ$_2nF}y
zb$A_qrfu>v6<pwXV9^A>f?Hq(?}IntF#PqOOC&mwXrQ1A{tb7-`la#(#1Xg??t_oQ
zC*TpdACAMra9X>M8;&AjqhJi4*XEBXDieM$zt4<+Q-1cXQG4ljwrJ<_vl-9HyHqGT
ju4j8rE=z9yzcWs_**iJMm8sQFks!>{Og>YbBOZSNi{O)2

diff --git a/src/main.asm b/src/main.asm
index 2481e99..1aa3f40 100644
--- a/src/main.asm
+++ b/src/main.asm
@@ -19,6 +19,10 @@ section .data
 
     user_location_pos db 0
 
+    user_input times 3 db 0
+    user_input_len equ $ - user_input
+
+
     newline db 0xA, 0
     newline_len equ $ - newline
 
@@ -59,8 +63,12 @@ print_loop:
     ;     call print_String
     ; }
     
-
-    cmp r10, [rel user_location]
+no_user_location:
+    ; Replace this:
+    ; cmp r10, byte [rel user_location_pos]
+    ; je has_user_location_pos
+    movzx rax, byte [rel user_location_pos]
+    cmp r10, rax
     je has_user_location_pos
 
     cmp byte [r11 + r10], 0
@@ -80,7 +88,7 @@ mine_tile:
     lea r8, [rel tile_mine]
     jmp print_tile
 
-_user_location:
+has_user_location_pos:
     lea r8, [rel user_location]
     jmp print_tile
 
@@ -88,8 +96,6 @@ print_tile:
     mov r9, tile_len
     call print_String
 
-no_user_location:
-
     ; Check if newline is needed (every 10th element)
     mov rax, r10
     xor rdx, rdx
@@ -108,7 +114,63 @@ no_newline:
 
     ; Print a cursor to show what tile the user is on
 
+    ; read user input, arrow keys 
+    ; if up arrow, decrement user_location_pos
+    ; if down arrow, increment user_location_pos
+    ; if left arrow, decrement user_location_pos
+    ; if right arrow, increment user_location_pos
 
+    ; Read user input
+    mov rax, 0x2000003            ; syscall: read
+    mov rdi, 0                    ; file descriptor: stdin
+    lea rsi, [rel user_input]     ; buffer to store input
+    mov rdx, 1                    ; number of bytes to read
+    syscall
+
+    ; Check the input and update user_location_pos accordingly
+    cmp byte [rel user_input], 0x1B   ; Escape sequence
+    jne no_escape
+
+    ; Read the next two bytes for arrow keys
+    mov rax, 0x2000003            ; syscall: read
+    mov rdi, 0                    ; file descriptor: stdin
+    lea rsi, [rel user_input + 1] ; buffer to store input
+    mov rdx, 2                    ; number of bytes to read
+    syscall
+
+    ; Check for arrow keys
+    cmp byte [rel user_input + 1], 0x5B
+    jne no_arrow
+
+    cmp byte [rel user_input + 2], 0x41 ; Up arrow
+    je move_up
+    cmp byte [rel user_input + 2], 0x42 ; Down arrow
+    je move_down
+    cmp byte [rel user_input + 2], 0x43 ; Right arrow
+    je move_right
+    cmp byte [rel user_input + 2], 0x44 ; Left arrow
+    je move_left
+
+no_arrow:
+    jmp no_user_location
+
+move_up:
+    dec byte [rel user_location_pos]
+    jmp no_user_location
+
+move_down:
+    inc byte [rel user_location_pos]
+    jmp no_user_location
+
+move_right:
+    inc byte [rel user_location_pos]
+    jmp no_user_location
+
+move_left:
+    dec byte [rel user_location_pos]
+    jmp no_user_location
+
+no_escape:
     ; Exit
     mov rax, 0x2000001
     xor rdi, rdi