/**
 * 从二进制数据中查找指定的数据
 */
export function findIndexOfData(
    data: Buffer | Uint8Array | ArrayBuffer,
    findData: Buffer | Uint8Array | ArrayBuffer,
    startOffset: number = 0
) {
    if (data instanceof ArrayBuffer) data = new Uint8Array(data)
    if (findData instanceof ArrayBuffer) findData = new Uint8Array(findData)

    let buffer = <Buffer | Uint8Array>data
    let findBuffer = <Buffer | Uint8Array>findData

    let offset = startOffset || 0

    var nlen = findBuffer.length
    var hlen = buffer.length - offset

    if (nlen <= 0 || hlen <= 0) return -1

    if (offset + nlen > buffer.length) return -1

    var last = nlen - 1
    var scan = 0
    var skip: any = {}
    var jump

    for (scan = 0; scan < last; scan++) {
        skip[findBuffer[scan]] = last - scan
    }

    while (hlen >= nlen) {
        for (scan = last; buffer[offset + scan] === findBuffer[scan]; scan--) {
            if (scan === 0) {
                return offset
            }
        }
        jump = skip[buffer[offset + last]]
        jump = jump != null ? jump : nlen
        hlen -= jump
        offset += jump
    }

    return -1
}