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
+}

2024/day-17/solution-1.sh

@@ -23,39 +23,7 @@ while [[ $POINTER -lt $INPUT_LEN ]]
 do
   OPCODE=${INPUT[$POINTER]}
   OPERAND=${INPUT[$POINTER+1]}
-  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
+  read_opcode "$OPCODE" "$OPERAND"
   printf "Registers A : %s B: %s C : %s\n" "$REG_A" "$REG_B" "$REG_C" >&2
   printf "Pointer : %s\n" "$POINTER" >&2
   (( ITER-- ))

2024/day-17/solution-2.sh

@@ -2,6 +2,7 @@
 
 FILE=$1
 ITER=99
+DEBUG=false
 
 REG_A=$(grep 'Register A:' "$FILE" | cut -f2 -d: )
 REG_B=$(grep 'Register B:' "$FILE" | cut -f2 -d: )
@@ -14,137 +15,17 @@ printf "Input : " >&2
 printf "%s " "${INPUT[@]}" >&2
 printf "\n" >&2
 
-adv () { # OPCODE 0
-  printf "OPCODE : 0 OP: adv OPERAND: %s\n" "$1" >&2
-  OPERAND=$( get_combo "$1" )
-  REG_A=$(( REG_A / (2 ** OPERAND) ))
-}
-bxl () { # OPCODE 1
-  printf "OPCODE : 1 OP: bxl OPERAND: %s\n" "$1" >&2
-  OPERAND=$1
-  REG_B=$(( REG_B ^ OPERAND ))
-}
-bst () { # OPCODE 2
-  printf "OPCODE : 2 OP: bst OPERAND: %s\n" "$1" >&2
-  OPERAND=$( get_combo "$1" )
-  REG_B=$(( OPERAND % 8 ))
-}
-jnz () { # OPCODE 3
-  printf "OPCODE : 3 OP: jnz OPERAND: %s\n" "$1" >&2
-  OPERAND=$1
-  if [[ $REG_A -eq 0 ]]
-  then
-    return 0
-  else
-    POINTER=$OPERAND
-  fi
-}
-bxc () { # OPCODE 4
-  printf "OPCODE : 4 OP: bxc OPERAND: %s\n" "$1" >&2
-  # OPERAND=$1 # Deprecated for legacy reasons
-  REG_B=$(( REG_B ^ REG_C ))
-}
-out () { # OPCODE 5
-  printf "OPCODE : 5 OP: out OPERAND: %s\n" "$1" >&2
-  OPERAND=$( get_combo "$1" )
-  printf "%s\n" "$(( OPERAND % 8 ))"
-}
-bdv () { # OPCODE 6
-  printf "OPCODE : 6 OP: bdv OPERAND: %s\n" "$1" >&2
-  OPERAND=$( get_combo "$1" )
-  REG_B=$(( REG_A / (2 ** OPERAND) ))
-}
-cdv () { # OPCODE 7
-  printf "OPCODE : 7 OP: cdv OPERAND: %s\n" "$1" >&2
-  OPERAND=$( get_combo "$1" )
-  REG_C=$(( REG_A / (2 ** OPERAND) ))
-}
+# Load machine operations
+. machine.sh
 
-get_combo () {
-  # Interpret operand value
-  if [[ $OPERAND -eq 0 ]]
-  then
-    printf "$1"
-  elif [[ $OPERAND -eq 1 ]]
-  then
-    printf "$1"
-  elif [[ $OPERAND -eq 2 ]]
-  then
-    printf "$1"
-  elif [[ $OPERAND -eq 3 ]]
-  then
-    printf "$1"
-  elif [[ $OPERAND -eq 4 ]]
-  then
-    printf "%s" "$REG_A"
-  elif [[ $OPERAND -eq 5 ]]
-  then
-    printf "%s" "$REG_B"
-  elif [[ $OPERAND -eq 6 ]]
-  then
-    printf "%s" "$REG_C"
-  elif [[ $OPERAND -eq 7 ]]
-  then
-    printf "Reserved operand. Exiting.\n" >&2
-    exit 1
-  fi
-}
-
-check_quine () {
-  for (( i=0; i<INPUT_LEN; i++ ))
-  do
-    if [[ ${INPUT[$i]} != "${OUTPUT[$i]}" ]]
-    then
-      return 1
-    fi
-  done
-}
-
-while ! check_quine
+POINTER=0
+while [[ $POINTER -lt $INPUT_LEN ]]
 do
-  read -r -a OUTPUT <<<"$(
-    POINTER=0
-    while [[ $POINTER -lt $INPUT_LEN ]]
-    do
-      OPCODE=${INPUT[$POINTER]}
-      OPERAND=${INPUT[$POINTER+1]}
-      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
-      printf "Registers A : %s B: %s C : %s\n" "$REG_A" "$REG_B" "$REG_C" >&2
-      printf "Pointer : %s\n" "$POINTER" >&2
-      (( ITER-- ))
-      if [[ $ITER -eq 0 ]] ; then break ;fi
-    done | paste -s -d "," 
-  )"
-done
+  OPCODE=${INPUT[$POINTER]}
+  OPERAND=${INPUT[$POINTER+1]}
+  read_opcode "$OPCODE" "$OPERAND"
+  printf "Registers A : %s B: %s C : %s\n" "$REG_A" "$REG_B" "$REG_C" >&2
+  printf "Pointer : %s\n" "$POINTER" >&2
+  (( ITER-- ))
+  if [[ $ITER -eq 0 ]] ; then break ;fi
+done | paste -s -d ","