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rc/sh/sram
2021-07-29 00:37:35 -07:00

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#!/usr/bin/env zsh
# YES_ZSH
sram() {
die() {
echo -E "$@">&2
exit 1
}
crop() {
tail -n +$((($1)/16+1))
}
revend() {
objcopy -I binary -O binary --reverse-bytes=4 "$@"
}
dump() {
xxd -ps -c 16 "$@"
}
zeros() {
# one row (16) of zeros
yes "00000000000000000000000000000000" | head -n $1
}
game="$1"
in="$2"
out="$3"
if [[ "$game" == "mm" ]]; then
headsize=$((0x20800))
elif [[ "$game" == "oot" ]]; then
headsize=$((0x40800))
else
echo "Unknown game." >&2
return 1
fi
[ -e "$2" ] || die "input save does not exist"
if [[ "${in##*.}" == "SaveRAM" ]] then
dump "$in" | crop $headsize | dump -r > "$out"
else
cat <(zeros $(($headsize/16))) <(dump "$in") | dump -r > "$out"
fi
revend "$out"
}
[ "${SOURCING:-0}" -gt 0 ] || sram "$@"