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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/@webassemblyjs/helper-wasm-section/esm/remove.js | |
download | website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.gz website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.bz2 website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.zip |
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Diffstat (limited to 'node_modules/@webassemblyjs/helper-wasm-section/esm/remove.js')
-rw-r--r-- | node_modules/@webassemblyjs/helper-wasm-section/esm/remove.js | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/node_modules/@webassemblyjs/helper-wasm-section/esm/remove.js b/node_modules/@webassemblyjs/helper-wasm-section/esm/remove.js new file mode 100644 index 0000000..3ed85a0 --- /dev/null +++ b/node_modules/@webassemblyjs/helper-wasm-section/esm/remove.js @@ -0,0 +1,36 @@ +import { traverse, getSectionMetadatas, shiftSection } from "@webassemblyjs/ast"; +import { overrideBytesInBuffer } from "@webassemblyjs/helper-buffer"; +export function removeSections(ast, uint8Buffer, section) { + var sectionMetadatas = getSectionMetadatas(ast, section); + + if (sectionMetadatas.length === 0) { + throw new Error("Section metadata not found"); + } + + return sectionMetadatas.reverse().reduce(function (uint8Buffer, sectionMetadata) { + var startsIncludingId = sectionMetadata.startOffset - 1; + var ends = section === "start" ? sectionMetadata.size.loc.end.column + 1 : sectionMetadata.startOffset + sectionMetadata.size.value + 1; + var delta = -(ends - startsIncludingId); + /** + * update AST + */ + // Once we hit our section every that is after needs to be shifted by the delta + + var encounteredSection = false; + traverse(ast, { + SectionMetadata: function SectionMetadata(path) { + if (path.node.section === section) { + encounteredSection = true; + return path.remove(); + } + + if (encounteredSection === true) { + shiftSection(ast, path.node, delta); + } + } + }); // replacement is nothing + + var replacement = []; + return overrideBytesInBuffer(uint8Buffer, startsIncludingId, ends, replacement); + }, uint8Buffer); +}
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