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					91 lines
				
				2.6 KiB
			
		
		
			
		
	
	
					91 lines
				
				2.6 KiB
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											4 years ago
										 
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								import Long from "@xtuc/long";
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								import parseHexFloat from "@webassemblyjs/floating-point-hex-parser";
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								import { CompileError } from "@webassemblyjs/helper-api-error";
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								export function parse32F(sourceString) {
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								  if (isHexLiteral(sourceString)) {
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								    return parseHexFloat(sourceString);
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								  }
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								  if (isInfLiteral(sourceString)) {
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								    return sourceString[0] === "-" ? -1 : 1;
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								  }
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								  if (isNanLiteral(sourceString)) {
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								    return (sourceString[0] === "-" ? -1 : 1) * (sourceString.includes(":") ? parseInt(sourceString.substring(sourceString.indexOf(":") + 1), 16) : 0x400000);
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								  }
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								  return parseFloat(sourceString);
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								}
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								export function parse64F(sourceString) {
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								  if (isHexLiteral(sourceString)) {
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								    return parseHexFloat(sourceString);
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								  }
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								  if (isInfLiteral(sourceString)) {
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								    return sourceString[0] === "-" ? -1 : 1;
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								  }
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								  if (isNanLiteral(sourceString)) {
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								    return (sourceString[0] === "-" ? -1 : 1) * (sourceString.includes(":") ? parseInt(sourceString.substring(sourceString.indexOf(":") + 1), 16) : 0x8000000000000);
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								  }
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								  if (isHexLiteral(sourceString)) {
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								    return parseHexFloat(sourceString);
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								  }
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								  return parseFloat(sourceString);
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								}
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								export function parse32I(sourceString) {
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								  var value = 0;
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								  if (isHexLiteral(sourceString)) {
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								    value = ~~parseInt(sourceString, 16);
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								  } else if (isDecimalExponentLiteral(sourceString)) {
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								    throw new Error("This number literal format is yet to be implemented.");
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								  } else {
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								    value = parseInt(sourceString, 10);
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								  }
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								  return value;
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								}
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								export function parseU32(sourceString) {
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								  var value = parse32I(sourceString);
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								  if (value < 0) {
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								    throw new CompileError("Illegal value for u32: " + sourceString);
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								  }
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								  return value;
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								}
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								export function parse64I(sourceString) {
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								  var long;
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								  if (isHexLiteral(sourceString)) {
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								    long = Long.fromString(sourceString, false, 16);
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								  } else if (isDecimalExponentLiteral(sourceString)) {
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								    throw new Error("This number literal format is yet to be implemented.");
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								  } else {
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								    long = Long.fromString(sourceString);
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								  }
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								  return {
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								    high: long.high,
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								    low: long.low
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								  };
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								}
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								var NAN_WORD = /^\+?-?nan/;
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								var INF_WORD = /^\+?-?inf/;
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								export function isInfLiteral(sourceString) {
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								  return INF_WORD.test(sourceString.toLowerCase());
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								}
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								export function isNanLiteral(sourceString) {
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								  return NAN_WORD.test(sourceString.toLowerCase());
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								}
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								function isDecimalExponentLiteral(sourceString) {
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								  return !isHexLiteral(sourceString) && sourceString.toUpperCase().includes("E");
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								}
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								function isHexLiteral(sourceString) {
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								  return sourceString.substring(0, 2).toUpperCase() === "0X" || sourceString.substring(0, 3).toUpperCase() === "-0X";
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								}
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