1 | import Long from "@xtuc/long";
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2 | import parseHexFloat from "@webassemblyjs/floating-point-hex-parser";
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3 | import { CompileError } from "@webassemblyjs/helper-api-error";
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4 | export function parse32F(sourceString) {
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5 | if (isHexLiteral(sourceString)) {
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6 | return parseHexFloat(sourceString);
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7 | }
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8 |
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9 | if (isInfLiteral(sourceString)) {
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10 | return sourceString[0] === "-" ? -1 : 1;
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11 | }
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12 |
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13 | if (isNanLiteral(sourceString)) {
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14 | return (sourceString[0] === "-" ? -1 : 1) * (sourceString.includes(":") ? parseInt(sourceString.substring(sourceString.indexOf(":") + 1), 16) : 0x400000);
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15 | }
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16 |
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17 | return parseFloat(sourceString);
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18 | }
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19 | export function parse64F(sourceString) {
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20 | if (isHexLiteral(sourceString)) {
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21 | return parseHexFloat(sourceString);
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22 | }
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23 |
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24 | if (isInfLiteral(sourceString)) {
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25 | return sourceString[0] === "-" ? -1 : 1;
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26 | }
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27 |
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28 | if (isNanLiteral(sourceString)) {
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29 | return (sourceString[0] === "-" ? -1 : 1) * (sourceString.includes(":") ? parseInt(sourceString.substring(sourceString.indexOf(":") + 1), 16) : 0x8000000000000);
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30 | }
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31 |
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32 | if (isHexLiteral(sourceString)) {
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33 | return parseHexFloat(sourceString);
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34 | }
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35 |
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36 | return parseFloat(sourceString);
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37 | }
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38 | export function parse32I(sourceString) {
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39 | var value = 0;
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40 |
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41 | if (isHexLiteral(sourceString)) {
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42 | value = ~~parseInt(sourceString, 16);
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43 | } else if (isDecimalExponentLiteral(sourceString)) {
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44 | throw new Error("This number literal format is yet to be implemented.");
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45 | } else {
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46 | value = parseInt(sourceString, 10);
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47 | }
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48 |
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49 | return value;
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50 | }
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51 | export function parseU32(sourceString) {
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52 | var value = parse32I(sourceString);
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53 |
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54 | if (value < 0) {
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55 | throw new CompileError("Illegal value for u32: " + sourceString);
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56 | }
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57 |
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58 | return value;
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59 | }
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60 | export function parse64I(sourceString) {
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61 | var long;
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62 |
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63 | if (isHexLiteral(sourceString)) {
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64 | long = Long.fromString(sourceString, false, 16);
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65 | } else if (isDecimalExponentLiteral(sourceString)) {
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66 | throw new Error("This number literal format is yet to be implemented.");
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67 | } else {
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68 | long = Long.fromString(sourceString);
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69 | }
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70 |
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71 | return {
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72 | high: long.high,
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73 | low: long.low
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74 | };
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75 | }
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76 | var NAN_WORD = /^\+?-?nan/;
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77 | var INF_WORD = /^\+?-?inf/;
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78 | export function isInfLiteral(sourceString) {
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79 | return INF_WORD.test(sourceString.toLowerCase());
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80 | }
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81 | export function isNanLiteral(sourceString) {
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82 | return NAN_WORD.test(sourceString.toLowerCase());
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83 | }
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84 |
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85 | function isDecimalExponentLiteral(sourceString) {
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86 | return !isHexLiteral(sourceString) && sourceString.toUpperCase().includes("E");
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87 | }
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88 |
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89 | function isHexLiteral(sourceString) {
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90 | return sourceString.substring(0, 2).toUpperCase() === "0X" || sourceString.substring(0, 3).toUpperCase() === "-0X";
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91 | } |
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