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1 files changed, 56 insertions, 0 deletions

diff --git a/node_modules/@webassemblyjs/wasm-opt/lib/leb128.js b/node_modules/@webassemblyjs/wasm-opt/lib/leb128.js
new file mode 100644
index 00000000..e4a0e85d
--- /dev/null
+++ b/node_modules/@webassemblyjs/wasm-opt/lib/leb128.js
@@ -0,0 +1,56 @@
+"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;
+}
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