Initial Save

node_modules/es-abstract/helpers/bytesAsFloat32.js

@@ -0,0 +1,36 @@
+'use strict';
+
+var $pow = require('math-intrinsics/pow');
+
+module.exports = function bytesAsFloat32(rawBytes) {
+	// return new $Float32Array(new $Uint8Array(rawBytes).buffer)[0];
+
+	/*
+        Let value be the byte elements of rawBytes concatenated and interpreted as a little-endian bit string encoding of an IEEE 754-2008 binary32 value.
+If value is an IEEE 754-2008 binary32 NaN value, return the NaN Number value.
+Return the Number value that corresponds to value.
+        */
+	var sign = rawBytes[3] & 0x80 ? -1 : 1; // Check the sign bit
+	var exponent = ((rawBytes[3] & 0x7F) << 1)
+		| (rawBytes[2] >> 7); // Combine bits for exponent
+	var mantissa = ((rawBytes[2] & 0x7F) << 16)
+		| (rawBytes[1] << 8)
+		| rawBytes[0]; // Combine bits for mantissa
+
+	if (exponent === 0 && mantissa === 0) {
+		return sign === 1 ? 0 : -0;
+	}
+	if (exponent === 0xFF && mantissa === 0) {
+		return sign === 1 ? Infinity : -Infinity;
+	}
+	if (exponent === 0xFF && mantissa !== 0) {
+		return NaN;
+	}
+
+	exponent -= 127; // subtract the bias
+
+	if (exponent === -127) {
+		return sign * mantissa * $pow(2, -126 - 23);
+	}
+	return sign * (1 + (mantissa * $pow(2, -23))) * $pow(2, exponent);
+};