/**
* Created by liurongming on 2017/5/30.
*/
export default class PMQTPTools {
/**
*
* utf8字符串转16进制字符串
* @utf8string 输入原始字符串
* @return 对象{转换的字节总数, 16进制字符串}
*
* demo
* let str = 'utf8字符串';
* const {writeSizes, hexString} = PMQTPTools.writeUTF8(str);
* console.log(writeSizes, hexString);
*
*/
static writeUTF8 (utf8string) {
let ret = {writeSizes:0, hexString:''};
const {byteSizes, decimalBytes} = this.transToUTF8(utf8string);
ret.writeSizes = byteSizes;
ret.hexString = this.decimalBytesToHexString(decimalBytes);
return ret;
}
/**
*
* utf8字符串转16进制字符数组
* @utf8string 输入原始字符串
* @return 对象{转换的字节总数, 固定2位格式的16进制字符串数组}
*
* demo
* let str = 'utf8字符串';
* const {sizes, bytes} = PMQTPTools.bytesUTF8(str);
* console.log(sizes, bytes);
*
*/
static hexBytesUTF8 (utf8string) {
let ret = {sizes:0, bytes:[]};
const {byteSizes, decimalBytes} = this.transToUTF8(utf8string);
ret.sizes = byteSizes;
ret.bytes = this.decimalBytesToHexBytes(decimalBytes);
return ret;
}
/**
*
* utf8字符串转十进制字符数组
* @utf8string 输入原始字符串
* @return 对象{转换的字节总数, 10进制字节数组}
*
* demo
* let str = 'utf8字符串';
* const {byteSizes, decimalBytes} = PMQTPTools.transToUTF8(str);
* console.log(byteSizes, decimalBytes);
*
*/
static transToUTF8 (utf8string) {
let ret = {byteSizes:0, decimalBytes:[]};
let byteSize = 0;
let back = [];
for (let i = 0; i < utf8string.length; i++) {
let code = utf8string.charCodeAt(i);
if (0x00 <= code && code <= 0x7f) {
byteSize += 1;
back.push(code);
} else if (0x80 <= code && code <= 0x7ff) {
byteSize += 2;
back.push((192 | (31 & (code >> 6))));
back.push((128 | (63 & code)))
} else if ((0x800 <= code && code <= 0xd7ff)
|| (0xe000 <= code && code <= 0xffff)) {
byteSize += 3;
back.push((224 | (15 & (code >> 12))));
back.push((128 | (63 & (code >> 6))));
back.push((128 | (63 & code)))
}
}
for (let i = 0; i < back.length; i++) {
back[i] &= 0xff;
}
ret.byteSizes = byteSize;
ret.decimalBytes = back;
return ret;
}
/**
*
* 16进制字符串转utf8字符串
* @hexString 输入原始字符串
* @return 对象{转换的字节总数, utf8字符串}
*
* demo
* const {readSizes, utf8String} = PMQTPTools.readUTF8('75746638e5ad97e7aca6e4b8b2');
* console.log(readSizes, utf8String);
*
*/
static readUTF8 (hexString) {
let ret = {readSizes:0, utf8String:''};
const {utf8Sizes, utf8Bytes} = this.transFromUTF8(hexString);
ret.readSizes = utf8Sizes;
ret.utf8String = utf8Bytes.join('');
return ret;
}
/**
*
* 16进制字符串转utf8字符数组
* @hexString 输入原始16进制字符串
* @return 对象{转换的字节总数, utf8字符数组}
*
* demo
* const {utf8Sizes, utf8Bytes} = PMQTPTools.transFromUTF8('75746638e5ad97e7aca6e4b8b2');
* console.log(utf8Sizes, utf8Bytes);
*
*/
static transFromUTF8 (hexString) {
let ret = {utf8Sizes:0, utf8Bytes:[]};
let back = [];
const array = this.hexStringToDecimalBytes(hexString);
ret.utf8Sizes = array.length;
for (let i = 0; i < array.length; i++) {
const one = array[i].toString(2);
const v = one.match(/^1+?(?=0)/);
if (v && one.length == 8) {
let bytesLength = v[0].length;
let store = array[i].toString(2).slice(7 - bytesLength);
for (let st = 1; st < bytesLength; st++) {
store += array[st + i].toString(2).slice(2);
}
back.push(String.fromCharCode(parseInt(store, 2)));
i += bytesLength - 1;
} else {
back.push(String.fromCharCode(array[i]));
}
}
ret.utf8Bytes = back;
return ret;
}
/**
*
* 写UTF16字符串
* @param pValue 原始字符串
*
*/
static writeUTF16 (pValue) {
pValue.replace(/[^\u0000-\u00FF]/g,function($0){return escape($0).replace(/(%u)(\w{4})/gi,"&#x$2;")});
}
/***
*
* 读取UTF16字符串
* @param pValue UTF16字节码
*
*/
static ReadUTF16 (pValue) {
unescape(pValue.replace(/&#x/g,'%u').replace(/\\u/g,'%u').replace(/;/g,''));
}
/**
*
* uint8转8位二进制字节码
* @byte 单字节数字
* @return 字符串 形如：'10001100'
*
*/
static uint8ToByteString(byte) {
let ret = [];
const string = byte.toString(2);
for (let i = string.length; 8 - i > 0; i++){
ret.push('0');
}
ret.push(string.substr(-8));
return ret.join('');
}
/**
*
* uint16转16位二进制字节码
* @number 数字number
* @return 字符串 形如：'1000110010001100'
*
*/
static uint16ToByteString(number) {
let ret = [];
const string = number.toString(2);
for (let i = string.length; 16 - i > 0; i++){
ret.push('0');
}
ret.push(string.substr(-16));
return ret.join('');
}
/**
*
* uint32转32位二进制字节码
* @number 数字number
* @return 字符串 形如：'10001100100011001000110010001100'
*
*/
static uint32ToByteString(number) {
let ret = [];
const string = number.toString(2);
for (let i = string.length; 32 - i > 0; i++){
ret.push('0');
}
ret.push(string.substr(-32));
return ret.join('');
}
/**
*
* uint8转16进制字节码
* @number 单字节数字number
* @return 字符串 形如：'FF'
*
*/
static uint8ToHexString(number) {
let ret = [];
let string = '0';
if (typeof number === 'string'){
const { hexString } = PMQTPTools.writeUTF8(number);
string = hexString.substr(0, 2);
} else {
string = number.toString(16);
}
const length = string.length;
if(length == 1)
{
ret.push(0);
ret.push(string);
} else {
ret.push(string.substr(-2));
}
return ret.join('');
}
/**
*
* 16位整数转16进制字节码
* @number 数字number
* @return 字符串 形如：'FFFFFFFF'
*
*/
static uint16ToHexString(number) {
let ret = [];
let string = '0';
if (typeof number === 'string'){
const { hexString } = PMQTPTools.writeUTF8(number);
string = hexString.substr(0, 2);
} else {
string = number.toString(16);
}
const length = string.length;
for (let i = length; 4 - i > 0; i++){
ret.push('0');
}
if(length <= 4)
{
ret.push(string);
} else {
ret.push(string.substr(-4));
}
return ret.join('');
}
/**
*
* 32位整数转16进制字节码
* @number 数字number
* @return 字符串 形如：'FFFFFFFF'
*
*/
static uint32ToHexString(number) {
let ret = [];
let string = '0';
if (typeof number === 'string'){
const { hexString } = PMQTPTools.writeUTF8(number);
string = hexString.substr(0, 2);
} else {
string = number.toString(16);
}
const length = string.length;
for (let i = length; 8 - i > 0; i++){
ret.push('0');
}
if(length <= 8)
{
ret.push(string);
} else {
ret.push(string.substr(-8));
}
return ret.join('');
}
/**
*
* 十进制字节数组转十六进制字符串
* @bytes 字节数组 bytes[]
* @return 字符串 形如：'ff00fffe...'
*
*/
static decimalBytesToHexString(bytes){
let ret = [];
for(let data of bytes)
{
let tmp = data.toString(16);
if(tmp.length == 1)
{
tmp = "0" + tmp;
}
ret.push(tmp)
}
return ret.join('');
}
/**
*
* 十进制字符数组转换十六进制字符数组
* @decimalbytes 字节数组 bytes[0,1]
* @return 字节数组 bytes[00,01]
*
*/
static decimalBytesToHexBytes(decimalbytes){
let ret = [];
for(let data of decimalbytes)
{
let tmp = data.toString(16);
if(tmp.length == 1)
{
tmp = "0" + tmp;
}
ret.push(tmp)
}
return ret;
}
/**
*
* 十六进制字符串转十进制字节数组
* @hexString 字节数组 形如：'ff00fffe...'
* @return 字节数组 bytes[]
*
* demo
*
* const ret = PMQTPTools.hexStringToDecimalBytes('75746638e5ad97e7aca6e4b8b2');
* console.log(ret); // [ 117, 116, 102, 56, 229, 173, 151, 231, 172, 166, 228, 184, 178 ]
*
*/
static hexStringToDecimalBytes(hexString){
let ret = [];
let pos = 0;
let length = hexString.length;
if(length % 2 != 0)
{
return null;
}
length /= 2;
for(let i = 0; i < length; i++)
{
let s = hexString.substr(pos, 2);
let v = parseInt(s, 16);
ret.push(v);
pos += 2;
}
return ret;
}
/**
*
* 十六进制字符串转十六进制字节数组
*
* @string 字节数组 形如：'75746638e5ad97e7aca6e4b8b2'
* @return 字节数组 bytes[]
*
* demo
*
* const ret = PMQTPTools.hexStringToHexBytes('75746638e5ad97e7aca6e4b8b2');
* console.log(ret); // [ '75','74','66','38','e5','ad','97','e7','ac','a6','e4','b8','b2' ]
*
*/
static hexStringToHexBytes(hexString){
let ret = [];
let pos = 0;
let length = hexString.length;
if(length % 2 != 0)
{
return null;
}
length /= 2;
for(let i = 0; i < length; i++)
{
let s = hexString.substr(pos, 2);
ret.push(s);
pos += 2;
}
return ret;
}
/**
*
* 写消息体属性
* @attribute 对象 {remain, slice, codec}
*
* @return 单字节数字number
*
* demo
*
* import {
* PMQTPStack,
* PMQTPAttribute,
* PMQTPTools,
* } from '../../PMQTP/PMQTPPacket'
*
* let attribute = new PMQTPAttribute();
* attribute.remain = '000';
* attribute.slice = '1';
* attribute.codec = '0000';
*
* let ret = PMQTPTools.writeAttribute(attribute);
* console.log(PMQTPTools.uint8ToByteString(ret));
*
* or
*
* let attribute = new PMQTPAttribute();
* attribute.setState({remain:'000',slice:'1',codec:'1100'});
*
* let ret = PMQTPTools.writeAttribute(attribute);
* console.log(PMQTPTools.uint8ToByteString(ret));
*
*/
static writeAttribute = (attribute) => {
let sign = [];
const {remain, slice, codec} = attribute;
sign.push('0b');
sign.push(remain);
sign.push(slice);
sign.push(codec);
return Number(sign.join(''));
}
/**
*
* 读消息体属性
* @number 单字节数字number
* @return 对象 {remain, slice, codec}
*
* demo
*
* import {
* PMQTPStack,
* PMQTPAttribute,
* PMQTPTools,
* } from '../../PMQTP/PMQTPPacket'
*
* let attribute = new PMQTPAttribute();
* attribute.remain = '000';
* attribute.slice = '1';
* attribute.codec = '0000';
*
* let ret = PMQTPTools.writeAttribute(attribute);
* console.log(PMQTPTools.uint8ToByteString(ret));
*
* const {remain, slice, codec} = PMQTPTools.readAttribute(ret);
* console.log(remain, slice, codec);
*
*/
static readAttribute = (number) => {
let ret = {remain:0, slice:0, codec:0};
const string = PMQTPTools.uint8ToByteString(number);
ret.remain = string.substring(0,3);
ret.slice = string.substring(3,4);
ret.codec = string.substring(4,8);
return ret;
}
/**
*
* 标准CRC16校验码
* @decimalBytes 输入十进制的字节数组
* @return 返回uint16的数字
*
* demo
* const {decimalBytes} = PMQTPTools.transToUTF8('123456789');
* let crc = PMQTPTools.crc16(decimalBytes);
* hexCRC = PMQTPTools.uint16ToHexString(crc);
* console.log(hexCRC); // 29b1
*
*/
static crc16(decimalBytes) {
let crc = 0xFFFF;
let tabccitt = [];
for (let i = 0; i < 256; i++) {
let ccitt = 0;
let c = i << 8;
for (let j = 0; j < 8; j++) {
if ((ccitt ^ c) & 0x8000){
ccitt = (ccitt << 1) ^ 0x1021;
}
else{
ccitt = ccitt << 1;
}
c = c << 1;
}
tabccitt.push(this.uint16ToHexString(ccitt));
}
for (let number of decimalBytes) {
const sc = 0x00FF & number;
const index = (0xFFFF) & ((crc >>> 8) ^ sc);
const n = Number.parseInt(tabccitt[index], 16);
crc = (0xFFFF) & ((0xFFFF) &(crc << 8)) ^ ((0xFFFF) & n);
}
return crc;
}
}
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