/**
 * 从 hex 字符串生成二级制数据
 */
export function hexToData(hexString: string): Uint8Array
export function hexToData(hexString: string, type: "Uint8Array"): Uint8Array
export function hexToData(hexString: string, type: "string"): string
export function hexToData(hexString: string, type: "ArrayBuffer"): ArrayBuffer
export function hexToData(hexString: string, type: "Uint8Array" | "string" | "ArrayBuffer" = "Uint8Array"): Uint8Array | string | ArrayBuffer {
    if (typeof hexString !== "string") throw new TypeError("formHex input must be a string.")
    // 移除常见的 0x 前缀（如果有），再清理无用字符
    if (/^0x/i.test(hexString)) {
        hexString = hexString.slice(2)
    }
    // 清理无用字符
    hexString = hexString.replace(/[^0-9a-fA-F]/g, "")

    if (hexString.length % 2 !== 0) throw new RangeError("formHex input is not a valid hex string.")

    const view = new Uint8Array(hexString.length / 2)

    for (let i = 0; i < hexString.length; i += 2) {
        view[i / 2] = parseInt(hexString.substring(i, i + 2), 16)
    }

    if (type == "string") return String.fromCharCode(...view)
    if (type == "ArrayBuffer") return view.buffer
    return view
}