前端浮点和16进制互转

一、浮点转16进制数据

//浮点数转16进制
function singleToHex(t) {if (t == "") {return "";}t = parseFloat(t.substr(0, 4));if (isNaN(t) == true) {return "Error";}if (t == 0) {return "00000000";}var s,e,m;if (t > 0) {s = 0;}else {s = 1;t = 0 - t;}m = t.toString(2);if (m >= 1) {if (m.indexOf(".") == -1) {m = m + ".0";}e = m.indexOf(".") - 1;}else {e = 1 - m.indexOf("1");}if (e >= 0) {m = m.replace(".", "");}else {m = m.substring(m.indexOf("1"));}if (m.length > 24) {m = m.substr(0, 24);}else {m = FillString(m, "0", 24, false)}m = m.substring(1);e = (e + 127).toString(2);e = FillString(e, "0", 8, true);var r = parseInt(s + e + m, 2).toString(16);r = FillString(r, "0", 8, true);var value = InsertString(r, " ", 2).toUpperCase();return value.substr(6, 2) + value.substr(9, 2) + value.substr(0, 2) + value.substr(3, 2)
}

二、16进制转浮点(单精度)

//16进制转浮点数(单精度)
function HexToDouble(hex) {let S, E, M, result;S = hex >>> 31;E = ((hex << 1) >>> 24);M = (hex << 9) >>> 9;if (E === 0xff) {if (M === 0x0) {return ((-1) ** S) * Infinity;} else {return NaN;}}result = ((-1) ** S) * (M / (1 << 23) + !!(E)) * (2 ** (E - 127 + !E));return result;
}

三、16进制转浮点(双精度)

//16进制转浮点数(双精度)
function hexToSingle(t, fixed = 2) {t = t.replace(/\s+/g, "");if (t == "") {return "";}if (t == "00000000") {return "0";}if ((t.length > 8) || (isNaN(parseInt(t, 16)))) {return "Error";}if (t.length < 8) {t = FillString(t, "0", 8, true);}t = parseInt(t, 16).toString(2);t = FillString(t, "0", 32, true);var s = t.substring(0, 1);var e = t.substring(1, 9);var m = t.substring(9);e = parseInt(e, 2) - 127;m = "1" + m;if (e >= 0) {m = m.substr(0, e + 1) + "." + m.substring(e + 1)}else {m = "0." + FillString(m, "0", m.length - e - 1, true)}if (m.indexOf(".") == -1) {m = m + ".0";}var a = m.split(".");var mi = parseInt(a[0], 2);var mf = 0;for (var i = 0; i < a[1].length; i++) {mf += parseFloat(a[1].charAt(i)) * Math.pow(2, -(i + 1));}m = parseInt(mi) + parseFloat(mf);if (s == 1) {m = 0 - m;}if (fixed) {m = m.toFixed(fixed).replace(/[.]?0+$/, "")}return m;
}