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Viewing file:     index.js (2.56 KB)      -rw-r--r--

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) {
  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";
}