82 lines
2.2 KiB
JavaScript
82 lines
2.2 KiB
JavaScript
//二进制数组转16进掉
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function bytesToHex(arr) {
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var str = "";
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for (var i = 0; i < arr.length; i++) {
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str += (0x0100 + (arr[i] & 0x00FF)).toString(16).substring(1);
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}
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return str;
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};
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//16进掉转二进制数组
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function hexToBytes(str) {
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var arr = [];
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var hexStrLength = str.length;
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for (var i = 0; i < hexStrLength; i += 2) {
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arr[arr.length] = parseInt(str.substr(i, 2), 16)
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}
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return arr;
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};
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//字符转UTF-8的二进制数组
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function strToUtf8Bytes(str) {
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var bytes = new Array();
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var len, c;
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len = str.length;
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for (var i = 0; i < len; i++) {
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c = str.charCodeAt(i);
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if (c >= 0x010000 && c <= 0x10FFFF) {
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bytes.push(((c >> 18) & 0x07) | 0xF0);
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bytes.push(((c >> 12) & 0x3F) | 0x80);
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bytes.push(((c >> 6) & 0x3F) | 0x80);
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bytes.push((c & 0x3F) | 0x80);
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} else if (c >= 0x000800 && c <= 0x00FFFF) {
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bytes.push(((c >> 12) & 0x0F) | 0xE0);
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bytes.push(((c >> 6) & 0x3F) | 0x80);
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bytes.push((c & 0x3F) | 0x80);
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} else if (c >= 0x000080 && c <= 0x0007FF) {
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bytes.push(((c >> 6) & 0x1F) | 0xC0);
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bytes.push((c & 0x3F) | 0x80);
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} else {
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bytes.push(c & 0xFF);
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}
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}
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return bytes;
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};
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//二进制数组转UTF-8的字符
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function bytesToUtf8Str(arr) {
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try {
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var str = '', _arr = arr;
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for (var i = 0; i < _arr.length; i++) {
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var one = _arr[i].toString(2), v = one.match(/^1+?(?=0)/);
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if (v && one.length == 8) {
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var bytesLength = v[0].length;
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var store = _arr[i].toString(2).slice(7 - bytesLength);
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for (var st = 1; st < bytesLength; st++) {
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store += _arr[st + i].toString(2).slice(2);
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}
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str += String.fromCharCode(parseInt(store, 2));
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i += bytesLength - 1;
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} else {
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str += String.fromCharCode(_arr[i]);
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}
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}
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return str;
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} catch(e) {
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alert("转UTF8出错，非UTF8的二进制数组");
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}
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};
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function clearArray(destinationArray, destinationIndex, length) {
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for (elm in destinationArray) {
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destinationArray[elm] = null
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}
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};
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function copyArray(sourceArray, sourceIndex, destinationArray, destinationIndex, length) {
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var cloneArray = sourceArray.slice(sourceIndex, sourceIndex + length);
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for (var i = 0; i < cloneArray.length; i++) {
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destinationArray[destinationIndex] = cloneArray[i];
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destinationIndex++
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}
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}; |