mirror of
https://github.com/notwa/rc
synced 2024-11-05 06:29:02 -08:00
48 lines
1 KiB
Bash
Executable file
48 lines
1 KiB
Bash
Executable file
#!/usr/bin/env zsh
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# compat: -ash +bash -dash +zsh
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sram() { ### @-
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### convert between a couple saveram formats for N64 emulators.
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sram_crop() {
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tail -n +$((($1)/16+1))
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}
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sram_revend() {
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objcopy -I binary -O binary --reverse-bytes=4 "$@"
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}
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sram_dump() {
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xxd -ps -c 16 "$@"
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}
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sram_zeros() {
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# one row (16) of zeros
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yes "00000000000000000000000000000000" | head -n $1
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}
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game="$1"
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in="$2"
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out="$3"
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if [ "$game" = "mm" ]; then
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headsize=$((0x20800))
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elif [ "$game" = "oot" ]; then
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headsize=$((0x40800))
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else
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echo "Unknown game." >&2
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return 1
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fi
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[ -e "$2" ] || { echo -E "input save does not exist" >&2; return 1; }
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if [ "${in##*.}" = "SaveRAM" ]; then
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sram_dump "$in" | sram_crop $headsize | sram_dump -r > "$out"
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else
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cat <(sram_zeros $(($headsize/16))) <(sram_dump "$in") | sram_dump -r > "$out"
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fi
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sram_revend "$out"
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}
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[ -n "${preload+-}" ] || sram "$@"
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