1 | "use strict";
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.resizeSectionByteSize = resizeSectionByteSize;
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7 | exports.resizeSectionVecSize = resizeSectionVecSize;
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8 |
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9 | var _wasmGen = require("@webassemblyjs/wasm-gen");
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10 |
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11 | var _ast = require("@webassemblyjs/ast");
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12 |
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13 | var _helperBuffer = require("@webassemblyjs/helper-buffer");
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14 |
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15 | function resizeSectionByteSize(ast, uint8Buffer, section, deltaBytes) {
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16 | var sectionMetadata = (0, _ast.getSectionMetadata)(ast, section);
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17 |
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18 | if (typeof sectionMetadata === "undefined") {
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19 | throw new Error("Section metadata not found");
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20 | }
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21 |
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22 | if (typeof sectionMetadata.size.loc === "undefined") {
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23 | throw new Error("SectionMetadata " + section + " has no loc");
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24 | }
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25 |
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26 |
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27 | var start = sectionMetadata.size.loc.start.column;
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28 | var end = sectionMetadata.size.loc.end.column;
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29 | var newSectionSize = sectionMetadata.size.value + deltaBytes;
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30 | var newBytes = (0, _wasmGen.encodeU32)(newSectionSize);
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31 | |
32 |
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33 |
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34 |
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35 | sectionMetadata.size.value = newSectionSize;
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36 | var oldu32EncodedLen = end - start;
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37 | var newu32EncodedLen = newBytes.length;
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38 |
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39 | if (newu32EncodedLen !== oldu32EncodedLen) {
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40 | var deltaInSizeEncoding = newu32EncodedLen - oldu32EncodedLen;
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41 | sectionMetadata.size.loc.end.column = start + newu32EncodedLen;
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42 | deltaBytes += deltaInSizeEncoding;
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43 |
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44 | sectionMetadata.vectorOfSize.loc.start.column += deltaInSizeEncoding;
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45 | sectionMetadata.vectorOfSize.loc.end.column += deltaInSizeEncoding;
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46 | }
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47 |
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48 |
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49 | var encounteredSection = false;
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50 | (0, _ast.traverse)(ast, {
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51 | SectionMetadata: function SectionMetadata(path) {
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52 | if (path.node.section === section) {
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53 | encounteredSection = true;
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54 | return;
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55 | }
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56 |
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57 | if (encounteredSection === true) {
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58 | (0, _ast.shiftSection)(ast, path.node, deltaBytes);
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59 | }
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60 | }
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61 | });
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62 | return (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, start, end, newBytes);
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63 | }
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64 |
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65 | function resizeSectionVecSize(ast, uint8Buffer, section, deltaElements) {
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66 | var sectionMetadata = (0, _ast.getSectionMetadata)(ast, section);
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67 |
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68 | if (typeof sectionMetadata === "undefined") {
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69 | throw new Error("Section metadata not found");
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70 | }
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71 |
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72 | if (typeof sectionMetadata.vectorOfSize.loc === "undefined") {
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73 | throw new Error("SectionMetadata " + section + " has no loc");
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74 | }
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75 |
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76 |
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77 | if (sectionMetadata.vectorOfSize.value === -1) {
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78 | return uint8Buffer;
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79 | }
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80 |
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81 |
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82 | var start = sectionMetadata.vectorOfSize.loc.start.column;
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83 | var end = sectionMetadata.vectorOfSize.loc.end.column;
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84 | var newValue = sectionMetadata.vectorOfSize.value + deltaElements;
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85 | var newBytes = (0, _wasmGen.encodeU32)(newValue);
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86 |
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87 | sectionMetadata.vectorOfSize.value = newValue;
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88 | sectionMetadata.vectorOfSize.loc.end.column = start + newBytes.length;
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89 | return (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, start, end, newBytes);
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90 | } |
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