summaryrefslogtreecommitdiffstats
path: root/node_modules/@webassemblyjs/floating-point-hex-parser/esm/index.js
diff options
context:
space:
mode:
Diffstat (limited to 'node_modules/@webassemblyjs/floating-point-hex-parser/esm/index.js')
-rw-r--r--node_modules/@webassemblyjs/floating-point-hex-parser/esm/index.js42
1 files changed, 42 insertions, 0 deletions
diff --git a/node_modules/@webassemblyjs/floating-point-hex-parser/esm/index.js b/node_modules/@webassemblyjs/floating-point-hex-parser/esm/index.js
new file mode 100644
index 0000000..d8d858d
--- /dev/null
+++ b/node_modules/@webassemblyjs/floating-point-hex-parser/esm/index.js
@@ -0,0 +1,42 @@
+export default function parse(input) {
+ input = input.toUpperCase();
+ var splitIndex = input.indexOf("P");
+ var mantissa, exponent;
+
+ if (splitIndex !== -1) {
+ mantissa = input.substring(0, splitIndex);
+ exponent = parseInt(input.substring(splitIndex + 1));
+ } else {
+ mantissa = input;
+ exponent = 0;
+ }
+
+ var dotIndex = mantissa.indexOf(".");
+
+ if (dotIndex !== -1) {
+ var integerPart = parseInt(mantissa.substring(0, dotIndex), 16);
+ var sign = Math.sign(integerPart);
+ integerPart = sign * integerPart;
+ var fractionLength = mantissa.length - dotIndex - 1;
+ var fractionalPart = parseInt(mantissa.substring(dotIndex + 1), 16);
+ var fraction = fractionLength > 0 ? fractionalPart / Math.pow(16, fractionLength) : 0;
+
+ if (sign === 0) {
+ if (fraction === 0) {
+ mantissa = sign;
+ } else {
+ if (Object.is(sign, -0)) {
+ mantissa = -fraction;
+ } else {
+ mantissa = fraction;
+ }
+ }
+ } else {
+ mantissa = sign * (integerPart + fraction);
+ }
+ } else {
+ mantissa = parseInt(mantissa, 16);
+ }
+
+ return mantissa * (splitIndex !== -1 ? Math.pow(2, exponent) : 1);
+} \ No newline at end of file