Created
December 17, 2019 07:38
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AOC2019day17part1
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#!/bin/bash -eu | |
getloc() { | |
case $1 in | |
0) echo "$2" ;; | |
1) echo "Can't get location of immediate value" >&2 && exit 1 ;; | |
2) echo "$((rb + $2))" ;; | |
esac | |
} | |
getval() { | |
case $1 in | |
0) echo "${ram[$2]}" ;; | |
1) echo "$2" ;; | |
2) echo "${ram[rb+$2]}" ;; | |
esac | |
} | |
printinstr() { | |
local instr=$1 ; shift | |
while [ $# -gt 0 ]; do | |
case "$1" in | |
0) instr="$instr [$2]" ;; | |
1) instr="$instr $2" ;; | |
2) instr="$instr [$2 + rb($rb)]" ;; | |
esac | |
shift 2 | |
done | |
echo "$0 $instr" | |
} | |
add() { ram[$(getloc "$5" "$6")]=$(($(getval "$1" "$2") + $(getval "$3" "$4"))) ; } | |
mul() { ram[$(getloc "$5" "$6")]=$(($(getval "$1" "$2") * $(getval "$3" "$4"))) ; } | |
cmpl() { ram[$(getloc "$5" "$6")]=$(($(getval "$1" "$2") < $(getval "$3" "$4") ? 1 : 0 )) ; } | |
cmpe() { ram[$(getloc "$5" "$6")]=$(($(getval "$1" "$2") == $(getval "$3" "$4") ? 1 : 0 )) ; } | |
jmpt() { [ "$(getval "$1" "$2")" -eq 0 ] || pc=$(getval "$3" "$4") ; } | |
jmpf() { [ "$(getval "$1" "$2")" -ne 0 ] || pc=$(getval "$3" "$4") ; } | |
addrb() { ((rb+=$(getval "$1" "$2"))) ; } | |
outb() { getval "$1" "$2" ; } | |
inb() { ram[$(getloc "$1" "$2")]=$(<inputfile) ; } | |
bdb() { | |
local ramcopy=("${ram[@]}") | |
ramcopy[pc]="$(tput setaf 10)${ramcopy[pc]}$(tput setaf 15)<" | |
bdbout=$( | |
echo -e "$0\t$pc/$rb\t$(seq 0 15 | xargs | tr \ \\t)" | |
for addr in $(seq 0 16 "${#ramcopy[@]}"); do | |
echo "$0 $addr: ${ramcopy[*]:addr:16}" | tr \ \\t | |
done) | |
echo "$bdbout" >&2 | |
} | |
run() { | |
local -ai program ram | |
IFS=, read -r -a program < "$1" | |
shift | |
inputs=("$@") | |
[ -z "${DEBUG:-}" ] || echo "$0: program start: ${inputs[*]}" >&2 | |
ram=("${program[@]}" $(yes 0|head -n 128)) | |
declare -i pc=0 rb=0 | |
while : ; do | |
[ "${DEBUG:-}" != 2 ] || bdb | |
local opcode opfunc | |
local -i argc args=() | |
printf -v opcode %05d "${ram[pc++]}" | |
case "${opcode: -2:2}" in | |
01) opfunc=add argc=3 ;; | |
02) opfunc=mul argc=3 ;; | |
03) opfunc=inb argc=1 ;; | |
04) opfunc=outb argc=1 ;; | |
05) opfunc=jmpt argc=2 ;; | |
06) opfunc=jmpf argc=2 ;; | |
07) opfunc=cmpl argc=3 ;; | |
08) opfunc=cmpe argc=3 ;; | |
09) opfunc=addrb argc=1 ;; | |
99) break ;; | |
*) | |
echo "Unknown opcode $opcode at $((pc-1))" >&2 | |
return 1 | |
;; | |
esac | |
for ((arg=0; arg < argc; arg++)); do | |
args+=("${opcode: -3-arg:1}" "${ram[@]:pc++:1}") | |
done | |
[ -z "${DEBUG:-}" ] || printinstr "$opfunc" "${args[@]}" >&2 | |
"$opfunc" "${args[@]}" | |
done | |
} | |
readonly -f add mul inb outb jmpt jmpf cmpl cmpe addrb run bdb getval getloc printinstr | |
export -f add mul inb outb jmpt jmpf cmpl cmpe addrb run bdb getval getloc printinstr | |
draw() { | |
while true; do | |
read -r char | |
printf \\x$(printf %x $char) | |
done | |
} | |
run "$@" | draw |
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