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<script>
/**
* hex 16进制
* dex 10进制
*/
// 10进制转16进制
function dex2hex(dec, len = 4) {
let hex = "";
while( dec ) {
let last = dec & 15;
hex = String.fromCharCode(((last > 9) ? 55 : 48) + last) + hex;
dec >>= 4;
}
if (len) {
while(hex.length < len) hex = '0' + hex;
}
return hex;
}
// 16进制转10进制
function hex2dex(str) {
return parseInt(str, 16).toString(10)
}
// 16进制转ASCII码
function hexCharCodeToStr(hexCharCodeStr) {
let trimedStr = hexCharCodeStr.trim();
let rawStr = trimedStr.substr(0, 2).toLowerCase() === "0x" ? trimedStr.substr(2) : trimedStr;
let len = rawStr.length;
if (len % 2 !== 0) {
alert("存在非法字符!");
return "";
}
let curCharCode = '';
let resultStr = [];
for (let i = 0; i < len; i = i + 2) {
curCharCode = parseInt(rawStr.substr(i, 2), 16);
resultStr.push(String.fromCharCode(curCharCode));
}
return resultStr.join("");
}
// ArrayBuffer转16进制字符串
function ab2hex(buffer) {
return Array.prototype.map.call(
new Uint8Array(buffer),
function (bit) {
return ('00' + bit.toString(16)).slice(-2)
}
).join('')
}
// 16进制字符串转为ArrayBuffer
function str2ab(str) {
let buf = new ArrayBuffer(str.length / 2);
let bufView = new Uint8Array(buf);
for (let i = 0, strLen = str.length; i < strLen; i++) {
bufView[i] = parseInt(str.slice(i * 2, i * 2 + 2), 16);
}
return buf;
}
/* 示例一 */
// 10进制数值（最初的值）
const a0 = 5888888.0; console.log('a0', a0);
// 10进制 [转] 16进制字符串
const a1 = dex2hex(a0); console.log('a1', a1);
// 16进制字符串 [转] ArrayBuffer
const a2 = str2ab(a1); console.log('a2', a2);
// ArrayBuffer [转] 16进制字符串
const a3 = ab2hex(a2); console.log('a3', a3);
// 16进制字符串 [转] 10进制（得到最初的值）
const a4 = hex2dex(a3); console.log('a4', a4);
/* 示例二 */
// 16进制的字符串（由多个16进制值拼接的字符串）
const b0 = '6810BBBBBBBBBBBBBB0514AABB00';
// b0 转成 ArrayBuffer
const b1 = str2ab(b0);
// b1 转成 16进制字符串
const b2 = ab2hex(b1);
/* 示例三 */
const test1 = [1, '1', 100, 25, 380, 10, 0, '00'];
let hexStr = ''; // 16进制的字符串
test1.forEach(dex => {
// 10进制转16进制
hexStr = hexStr + dex2hex(dex, 4); // 2hex
});
console.log(hexStr); // 0001000100640019017C000A0000
const test2 = [];
for (let i = 0; i < hexStr.length; i++) {
if (!(i % 4)) {
test2.push(hexStr.substr(i, 4))
}
}
console.log(test2); // ['0001', '0001', '0064', '0019', '017C', '000A', '0000', '0000']
const test3 = test2.map(hex => {
return hex2dex(hex);
});
console.log(test3) // ['1', '1', '100', '25', '380', '10', '0', '0']
/* 示例四 */
// 10进制转16进制 16进制转10进制
console.log(dex2hex('1', 2), hex2dex('01')) // 01 1
console.log(dex2hex('1', 4), hex2dex('0001')) // 0001 1
console.log(dex2hex(1, 4), hex2dex('0001')) // 0001 1
console.log(dex2hex(160, 4), hex2dex('00A0')) // 00A0 160
console.log(dex2hex(1600, 4), hex2dex('0640')) // 0640 1600
</script>
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标签：10,console,进制,16,示例,蓝牙,let,应用,log From： https://www.cnblogs.com/zhaoxiaoying/p/16828569.html