exports.readIEEE754 = function (buffer, offset, isBE, mLen, nBytes){ 
var e, m, eLen = nBytes * 8 - mLen - 1, eMax = (1 << eLen) - 1, eBias = eMax >> 1, nBits = -7, i = isBE? 0: (nBytes - 1), d = isBE? 1: -1, s = buffer[offset + i]; 
i += d; 
e = s & ((1 << (- nBits)) - 1); 
s >>= (- nBits); 
nBits += eLen; 
for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8); 
m = e & ((1 << (- nBits)) - 1); 
e >>= (- nBits); 
nBits += mLen; 
for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8); 
if (e === 0) { 
e = 1 - eBias; 
} 
 else if (e === eMax) { 
return m? NaN: ((s? -1: 1) * Infinity); 
} 
 else { 
m = m + Math.pow(2, mLen); 
e = e - eBias; 
} 
return (s? -1: 1) * m * Math.pow(2, e - mLen); 
} 
; 
exports.writeIEEE754 = function (buffer, value, offset, isBE, mLen, nBytes){ 
var e, m, c, eLen = nBytes * 8 - mLen - 1, eMax = (1 << eLen) - 1, eBias = eMax >> 1, rt = (mLen === 23? Math.pow(2, -24) - Math.pow(2, -77): 0), i = isBE? (nBytes - 1): 0, d = isBE? -1: 1, s = value < 0 || (value === 0 && 1 / value < 0)? 1: 0; 
value = Math.abs(value); 
if (isNaN(value) || value === Infinity) { 
m = isNaN(value)? 1: 0; 
e = eMax; 
} 
 else { 
e = Math.floor(Math.log(value) / Math.LN2); 
if (value * (c = Math.pow(2, - e)) < 1) { 
e-- ; 
c *= 2; 
} 
if (e + eBias >= 1) { 
value += rt / c; 
} 
 else { 
value += rt * Math.pow(2, 1 - eBias); 
} 
if (value * c >= 2) { 
e++ ; 
c /= 2; 
} 
if (e + eBias >= eMax) { 
m = 0; 
e = eMax; 
} 
 else if (e + eBias >= 1) { 
m = (value * c - 1) * Math.pow(2, mLen); 
e = e + eBias; 
} 
 else { 
m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen); 
e = 0; 
} 
} 
for (; mLen >= 8; buffer[offset + i] = m & 255, i += d, m /= 256, mLen -= 8); 
e = (e << mLen) | m; 
eLen += mLen; 
for (; eLen > 0; buffer[offset + i] = e & 255, i += d, e /= 256, eLen -= 8); 
buffer[offset + i - d] |= s * 128; 
} 
;