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Integer to Little endian hex Conversion Script for Bitcoin Script
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#!/bin/bash | |
if [ -z $1 ]; | |
then | |
echo "You must include an integer as an argument."; | |
exit; | |
fi | |
if (( $1 > "2147483647" )) || (( $1 < "-2147483647" )); | |
then | |
echo "Your number ($1) must be between -2147483647 and 2147483647"; | |
exit; | |
fi | |
if [ $1 -lt 0 ]; | |
then | |
integer=$(echo $((-$1))); | |
negative=1; | |
else | |
integer=$1; | |
negative=0; | |
fi | |
hex=$(printf '%08x\n' $integer | sed 's/^\(00\)*//'); | |
hexfirst=$(echo $hex | cut -c1) | |
[[ 0x$hexfirst -gt 0x7 ]] && hex="00"$hex | |
lehex=$(echo $hex | tac -rs .. | echo "$(tr -d '\n')"); | |
if [ "$negative" -eq "1" ]; | |
then | |
lehex=$(printf '%x\n' $((0x$lehex | 0x80))) | |
fi | |
size=$(echo -n $lehex | wc -c | awk '{print $1/2}'); | |
hexcodeprefix=$(printf '%02x\n' $size); | |
echo "Integer: $1"; | |
echo "LE Hex: $lehex"; | |
echo "Length: $size bytes"; | |
echo "Hexcode: $hexcodeprefix$lehex"; |
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