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Redo "[kernel] Create Source.sourceCode as view of the binary bytes"

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Retrying now that https://github.com/dart-lang/sdk/issues/50206 is fixed.

Change-Id: I2612e53c845b2e906ab51bfe39db2fe775e10bca
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/264602
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Stephen Adams <sra@google.com>
This commit is contained in:
Stephen Adams 2022-10-21 01:11:47 +00:00 committed by Commit Queue
parent a4294c354c
commit b03b9c3712
1 changed files with 13 additions and 1 deletions
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14
pkg/kernel/lib/binary/ast_from_binary.dart
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@ -244,6 +244,18 @@ class BinaryBuilder {
return readBytes(readUInt30());
}
Uint8List readOrViewByteList() {
int length = readUInt30();
List<int> source = _bytes;
if (source is Uint8List) {
Uint8List view =
source.buffer.asUint8List(source.offsetInBytes + _byteOffset, length);
_byteOffset += length;
return view;
}
return readBytes(length);
}
String readString() {
return readStringEntry(readUInt30());
}
@ -927,7 +939,7 @@ class BinaryBuilder {
String uriString = readString();
Uri uri = Uri.parse(uriString);
_sourceUriTable[i] = uri;
Uint8List sourceCode = readByteList();
Uint8List sourceCode = readOrViewByteList();
int lineCount = readUInt30();
List<int> lineStarts = new List<int>.filled(
lineCount,