7f2dd5260f
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33 lines
1006 B
JavaScript
33 lines
1006 B
JavaScript
import { write, read } from "@xtuc/ieee754";
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/**
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* According to https://webassembly.github.io/spec/binary/values.html#binary-float
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* n = 32/8
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*/
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export var NUMBER_OF_BYTE_F32 = 4;
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/**
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* According to https://webassembly.github.io/spec/binary/values.html#binary-float
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* n = 64/8
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*/
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export var NUMBER_OF_BYTE_F64 = 8;
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export var SINGLE_PRECISION_MANTISSA = 23;
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export var DOUBLE_PRECISION_MANTISSA = 52;
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export function encodeF32(v) {
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var buffer = [];
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write(buffer, v, 0, true, SINGLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F32);
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return buffer;
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}
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export function encodeF64(v) {
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var buffer = [];
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write(buffer, v, 0, true, DOUBLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F64);
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return buffer;
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}
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export function decodeF32(bytes) {
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var buffer = new Uint8Array(bytes);
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return read(buffer, 0, true, SINGLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F32);
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}
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export function decodeF64(bytes) {
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var buffer = new Uint8Array(bytes);
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return read(buffer, 0, true, DOUBLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F64);
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} |