simple-squiggle

A restricted subset of Squiggle
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index.js (1552B)

      1 "use strict";
      2 
      3 Object.defineProperty(exports, "__esModule", {
      4   value: true
      5 });
      6 exports.encodeF32 = encodeF32;
      7 exports.encodeF64 = encodeF64;
      8 exports.decodeF32 = decodeF32;
      9 exports.decodeF64 = decodeF64;
     10 exports.DOUBLE_PRECISION_MANTISSA = exports.SINGLE_PRECISION_MANTISSA = exports.NUMBER_OF_BYTE_F64 = exports.NUMBER_OF_BYTE_F32 = void 0;
     11 
     12 var _ieee = require("@xtuc/ieee754");
     13 
     14 /**
     15  * According to https://webassembly.github.io/spec/binary/values.html#binary-float
     16  * n = 32/8
     17  */
     18 var NUMBER_OF_BYTE_F32 = 4;
     19 /**
     20  * According to https://webassembly.github.io/spec/binary/values.html#binary-float
     21  * n = 64/8
     22  */
     23 
     24 exports.NUMBER_OF_BYTE_F32 = NUMBER_OF_BYTE_F32;
     25 var NUMBER_OF_BYTE_F64 = 8;
     26 exports.NUMBER_OF_BYTE_F64 = NUMBER_OF_BYTE_F64;
     27 var SINGLE_PRECISION_MANTISSA = 23;
     28 exports.SINGLE_PRECISION_MANTISSA = SINGLE_PRECISION_MANTISSA;
     29 var DOUBLE_PRECISION_MANTISSA = 52;
     30 exports.DOUBLE_PRECISION_MANTISSA = DOUBLE_PRECISION_MANTISSA;
     31 
     32 function encodeF32(v) {
     33   var buffer = [];
     34   (0, _ieee.write)(buffer, v, 0, true, SINGLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F32);
     35   return buffer;
     36 }
     37 
     38 function encodeF64(v) {
     39   var buffer = [];
     40   (0, _ieee.write)(buffer, v, 0, true, DOUBLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F64);
     41   return buffer;
     42 }
     43 
     44 function decodeF32(bytes) {
     45   var buffer = Buffer.from(bytes);
     46   return (0, _ieee.read)(buffer, 0, true, SINGLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F32);
     47 }
     48 
     49 function decodeF64(bytes) {
     50   var buffer = Buffer.from(bytes);
     51   return (0, _ieee.read)(buffer, 0, true, DOUBLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F64);
     52 }