Use read_opcode function

2024/day-17/machine.sh

@@ -46,8 +46,8 @@ cdv () { # OPCODE 7
   REG_C=$(( REG_A / (2 ** OPERAND) ))
 }
 
+# Get combo operand
 get_combo () {
-  # Interpret operand value
   if [[ $OPERAND -eq 0 ]]
   then
     printf "$1"
@@ -76,6 +76,7 @@ get_combo () {
   fi
 }
 
+# Check if the program is a quine
 check_quine () {
   for (( i=0; i<INPUT_LEN; i++ ))
   do
@@ -85,3 +86,42 @@ check_quine () {
     fi
   done
 }
+
+# Interpret opcode
+read_opcode () {
+  local OPCODE=$1
+  local OPERAND=$2
+  if [[ $OPCODE -eq 0 ]]
+  then
+    adv "$OPERAND"
+    (( POINTER+=2 ))
+  elif [[ $OPCODE -eq 1 ]]
+  then
+    bxl "$OPERAND"
+    (( POINTER+=2 ))
+  elif [[ $OPCODE -eq 2 ]]
+  then
+    bst "$OPERAND"
+    (( POINTER+=2 ))
+  elif [[ $OPCODE -eq 3 ]]
+  then
+    # jnz itself moves the pointer
+    jnz "$OPERAND"
+  elif [[ $OPCODE -eq 4 ]]
+  then
+    bxc "$OPERAND"
+    (( POINTER+=2 ))
+  elif [[ $OPCODE -eq 5 ]]
+  then
+    out "$OPERAND"
+    (( POINTER+=2 ))
+  elif [[ $OPCODE -eq 6 ]]
+  then
+    bdv "$OPERAND"
+    (( POINTER+=2 ))
+  elif [[ $OPCODE -eq 7 ]]
+  then
+    cdv "$OPERAND"
+    (( POINTER+=2 ))
+  fi
+}