start werk

2019-09-17 23:18:00 +02:00
commit 615619e6e7
3598 changed files with 1238825 additions and 0 deletions
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+import { write, read } from "@xtuc/ieee754";
+/**
+ * According to https://webassembly.github.io/spec/binary/values.html#binary-float
+ * n = 32/8
+ */
+
+export var NUMBER_OF_BYTE_F32 = 4;
+/**
+ * According to https://webassembly.github.io/spec/binary/values.html#binary-float
+ * n = 64/8
+ */
+
+export var NUMBER_OF_BYTE_F64 = 8;
+export var SINGLE_PRECISION_MANTISSA = 23;
+export var DOUBLE_PRECISION_MANTISSA = 52;
+export function encodeF32(v) {
+  var buffer = [];
+  write(buffer, v, 0, true, SINGLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F32);
+  return buffer;
+}
+export function encodeF64(v) {
+  var buffer = [];
+  write(buffer, v, 0, true, DOUBLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F64);
+  return buffer;
+}
+export function decodeF32(bytes) {
+  var buffer = Buffer.from(bytes);
+  return read(buffer, 0, true, SINGLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F32);
+}
+export function decodeF64(bytes) {
+  var buffer = Buffer.from(bytes);
+  return read(buffer, 0, true, DOUBLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F64);
+}