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- 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";
- }
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