You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
import Long from "@xtuc/long"; import parseHexFloat from "@webassemblyjs/floating-point-hex-parser"; import { CompileError } from "@webassemblyjs/helper-api-error"; export function parse32F(sourceString) { if (isHexLiteral(sourceString)) { return parseHexFloat(sourceString); }
if (isInfLiteral(sourceString)) { return sourceString[0] === "-" ? -1 : 1; }
if (isNanLiteral(sourceString)) { return (sourceString[0] === "-" ? -1 : 1) * (sourceString.includes(":") ? parseInt(sourceString.substring(sourceString.indexOf(":") + 1), 16) : 0x400000); }
return parseFloat(sourceString); } export function parse64F(sourceString) { if (isHexLiteral(sourceString)) { return parseHexFloat(sourceString); }
if (isInfLiteral(sourceString)) { return sourceString[0] === "-" ? -1 : 1; }
if (isNanLiteral(sourceString)) { return (sourceString[0] === "-" ? -1 : 1) * (sourceString.includes(":") ? parseInt(sourceString.substring(sourceString.indexOf(":") + 1), 16) : 0x8000000000000); }
if (isHexLiteral(sourceString)) { return parseHexFloat(sourceString); }
return parseFloat(sourceString); } export function parse32I(sourceString) { var value = 0;
if (isHexLiteral(sourceString)) { value = ~~parseInt(sourceString, 16); } else if (isDecimalExponentLiteral(sourceString)) { throw new Error("This number literal format is yet to be implemented."); } else { value = parseInt(sourceString, 10); }
return value; } export function parseU32(sourceString) { var value = parse32I(sourceString);
if (value < 0) { throw new CompileError("Illegal value for u32: " + sourceString); }
return value; } export function parse64I(sourceString) { // $FlowIgnore
var _long;
if (isHexLiteral(sourceString)) { _long = Long.fromString(sourceString, false, 16); } else if (isDecimalExponentLiteral(sourceString)) { throw new Error("This number literal format is yet to be implemented."); } else { _long = Long.fromString(sourceString); }
return { high: _long.high, low: _long.low }; } var NAN_WORD = /^\+?-?nan/; var INF_WORD = /^\+?-?inf/; export function isInfLiteral(sourceString) { return INF_WORD.test(sourceString.toLowerCase()); } export function isNanLiteral(sourceString) { return NAN_WORD.test(sourceString.toLowerCase()); }
function isDecimalExponentLiteral(sourceString) { return !isHexLiteral(sourceString) && sourceString.toUpperCase().includes("E"); }
function isHexLiteral(sourceString) { return sourceString.substring(0, 2).toUpperCase() === "0X" || sourceString.substring(0, 3).toUpperCase() === "-0X"; }
|