You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1.6 KiB
56 lines
1.6 KiB
2 years ago
|
"use strict";
|
||
|
|
|
||
|
|
Object.defineProperty(exports, "__esModule", {
|
||
|
|
value: true
|
||
|
|
});
|
||
|
|
exports.shrinkPaddedLEB128 = shrinkPaddedLEB128;
|
||
|
|
|
||
|
|
var _ast = require("@webassemblyjs/ast");
|
||
|
|
|
||
|
|
var _encoder = require("@webassemblyjs/wasm-gen/lib/encoder");
|
||
|
|
|
||
|
|
var _helperBuffer = require("@webassemblyjs/helper-buffer");
|
||
|
|
|
||
|
|
function shiftFollowingSections(ast, _ref, deltaInSizeEncoding) {
|
||
|
|
var section = _ref.section;
|
||
|
|
// Once we hit our section every that is after needs to be shifted by the delta
|
||
|
|
var encounteredSection = false;
|
||
|
|
(0, _ast.traverse)(ast, {
|
||
|
|
SectionMetadata: function SectionMetadata(path) {
|
||
|
|
if (path.node.section === section) {
|
||
|
|
encounteredSection = true;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (encounteredSection === true) {
|
||
|
|
(0, _ast.shiftSection)(ast, path.node, deltaInSizeEncoding);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
function shrinkPaddedLEB128(ast, uint8Buffer) {
|
||
|
|
(0, _ast.traverse)(ast, {
|
||
|
|
SectionMetadata: function SectionMetadata(_ref2) {
|
||
|
|
var node = _ref2.node;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Section size
|
||
|
|
*/
|
||
|
|
{
|
||
|
|
var newu32Encoded = (0, _encoder.encodeU32)(node.size.value);
|
||
|
|
var newu32EncodedLen = newu32Encoded.length;
|
||
|
|
var start = node.size.loc.start.column;
|
||
|
|
var end = node.size.loc.end.column;
|
||
|
|
var oldu32EncodedLen = end - start;
|
||
|
|
|
||
|
|
if (newu32EncodedLen !== oldu32EncodedLen) {
|
||
|
|
var deltaInSizeEncoding = oldu32EncodedLen - newu32EncodedLen;
|
||
|
|
uint8Buffer = (0, _helperBuffer.overrideBytesInBuffer)(uint8Buffer, start, end, newu32Encoded);
|
||
|
|
shiftFollowingSections(ast, node, -deltaInSizeEncoding);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
return uint8Buffer;
|
||
|
|
}
|