PatternScanner.js

//How is there no stock way to patternscan a Buffer in Node?
//Written by me, lowkey proud
module.exports = (buffer, startOffset = 0, bytes) => {
	let bytesToFind = [...bytes]

	if(bytesToFind[0] === "?") throw "First byte can't be wildcard!"

	let sweepSearch = []

	while(bytesToFind.length) {
		if(bytesToFind[0] === "?") break
		sweepSearch.push(bytesToFind.shift())
	}

	sweepSearch = Buffer.from(sweepSearch)

	let i = startOffset
	let	max = buffer.length - bytesToFind.length

	while(i !== -1 && i < max) {
		i = buffer.indexOf(sweepSearch, i)

		if(i !== -1) {
			let fullMatch = true

			for(let occurenceSearch = 0; occurenceSearch < bytesToFind.length; occurenceSearch++) {
				if(bytesToFind[occurenceSearch] !== "?" && buffer[i + occurenceSearch + sweepSearch.length] != bytesToFind[occurenceSearch]) {
					fullMatch = false
					break
				}
			}

			if(fullMatch)	return i
		} 
    else break
		i++
	}

	return -1
}