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36 lines
1.3 KiB
36 lines
1.3 KiB
4 years ago
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import { traverse, getSectionMetadatas, shiftSection } from "@webassemblyjs/ast";
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import { overrideBytesInBuffer } from "@webassemblyjs/helper-buffer";
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export function removeSections(ast, uint8Buffer, section) {
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var sectionMetadatas = getSectionMetadatas(ast, section);
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if (sectionMetadatas.length === 0) {
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throw new Error("Section metadata not found");
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}
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return sectionMetadatas.reverse().reduce(function (uint8Buffer, sectionMetadata) {
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var startsIncludingId = sectionMetadata.startOffset - 1;
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var ends = section === "start" ? sectionMetadata.size.loc.end.column + 1 : sectionMetadata.startOffset + sectionMetadata.size.value + 1;
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var delta = -(ends - startsIncludingId);
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/**
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* update AST
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*/
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// Once we hit our section every that is after needs to be shifted by the delta
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var encounteredSection = false;
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traverse(ast, {
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SectionMetadata: function SectionMetadata(path) {
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if (path.node.section === section) {
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encounteredSection = true;
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return path.remove();
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}
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if (encounteredSection === true) {
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shiftSection(ast, path.node, delta);
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}
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}
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}); // replacement is nothing
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var replacement = [];
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return overrideBytesInBuffer(uint8Buffer, startsIncludingId, ends, replacement);
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}, uint8Buffer);
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}
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