| 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"; |
| } |