June 2018 Update

Task/Balanced-brackets/X86-Assembly/balanced-brackets.x86

@@ -0,0 +1,66 @@
+section .data
+
+MsgBalanced: db "OK", 10
+MsgBalancedLen: equ 3
+
+MsgUnbalanced: db "NOT OK", 10
+MsgUnbalancedLen: equ 7
+
+MsgBadInput: db "BAD INPUT", 10
+MsgBadInputLen: equ 10
+
+Open: equ '['
+Closed: equ ']'
+
+section .text
+
+BalancedBrackets:
+
+  xor rcx, rcx
+  mov rsi, rdi
+  cld
+
+  processBracket:
+    lodsb
+    cmp al, 0
+    je determineBalance
+
+    cmp al, Open
+    je processOpenBracket
+
+    cmp al, Closed
+    je processClosedBracket
+
+    mov rsi, MsgBadInput
+    mov rdx, MsgBadInputLen
+    jmp displayResult
+
+    processOpenBracket:
+      add rcx, 1
+      jmp processBracket
+
+    processClosedBracket:
+      cmp rcx, 0
+      je unbalanced
+
+      sub rcx, 1
+      jmp processBracket
+
+
+  determineBalance:
+    cmp rcx, 0
+    jne unbalanced
+
+    mov rsi, MsgBalanced
+    mov rdx, MsgBalancedLen
+    jmp displayResult
+
+  unbalanced:
+    mov rsi, MsgUnbalanced
+    mov rdx, MsgUnbalancedLen
+
+  displayResult:
+    mov rax, 1
+    mov rdi, 1
+    syscall
+    ret