Fine. Add ManifestNodeIntegerLiteral.

Also adds read/writeInt64() helpers.

No tests, because we don't have enough functionality, e.g. writing
constant variable initializers to test it with.

Change-Id: I677f988e8580cf6f290fd7c866ee8ef91821b110
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/419925
Reviewed-by: Paul Berry <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: scheglov

pkg/analyzer/lib/src/fine/manifest_ast.dart

@@ -29,6 +29,8 @@ sealed class ManifestNode {
     switch (kind) {
       case _ManifestNodeKind.annotation:
         return ManifestNodeAnnotation.read(reader);
+      case _ManifestNodeKind.integerLiteral:
+        return ManifestNodeIntegerLiteral.read(reader);
       case _ManifestNodeKind.simpleIdentifier:
         return ManifestNodeSimpleIdentifier.read(reader);
     }
@@ -81,6 +83,37 @@ class ManifestNodeAnnotation extends ManifestNode {
   }
 }
 
+class ManifestNodeIntegerLiteral extends ManifestNode {
+  final int? value;
+
+  ManifestNodeIntegerLiteral({
+    required this.value,
+  });
+
+  factory ManifestNodeIntegerLiteral.encode(IntegerLiteral node) {
+    return ManifestNodeIntegerLiteral(
+      value: node.value,
+    );
+  }
+
+  factory ManifestNodeIntegerLiteral.read(SummaryDataReader reader) {
+    return ManifestNodeIntegerLiteral(
+      value: reader.readOptionalInt64(),
+    );
+  }
+
+  @override
+  bool match(MatchContext context, AstNode node) {
+    return node is IntegerLiteral && node.value == value;
+  }
+
+  @override
+  void write(BufferedSink sink) {
+    sink.writeEnum(_ManifestNodeKind.integerLiteral);
+    sink.writeOptionalInt64(value);
+  }
+}
+
 class ManifestNodeSimpleIdentifier extends ManifestNode {
   final String name;
   final ManifestElement? element;
@@ -147,5 +180,6 @@ class ManifestNodeSimpleIdentifier extends ManifestNode {
 
 enum _ManifestNodeKind {
   annotation,
+  integerLiteral,
   simpleIdentifier,
 }

pkg/analyzer/lib/src/summary2/data_reader.dart

@@ -14,8 +14,11 @@ class SummaryDataReader {
 
   late final _StringTable _stringTable;
 
+  final Int64List _int64Buffer = Int64List(1);
+  late final Uint8List _int64BufferUint8 = _int64Buffer.buffer.asUint8List();
+
   final Float64List _doubleBuffer = Float64List(1);
-  Uint8List? _doubleBufferUint8;
+  late final Uint8List _doubleBufferUint8 = _doubleBuffer.buffer.asUint8List();
 
   SummaryDataReader(this.bytes);
 
@@ -43,16 +46,14 @@ class SummaryDataReader {
   }
 
   double readDouble() {
-    var doubleBufferUint8 =
-        _doubleBufferUint8 ??= _doubleBuffer.buffer.asUint8List();
-    doubleBufferUint8[0] = readByte();
-    doubleBufferUint8[1] = readByte();
-    doubleBufferUint8[2] = readByte();
-    doubleBufferUint8[3] = readByte();
-    doubleBufferUint8[4] = readByte();
-    doubleBufferUint8[5] = readByte();
-    doubleBufferUint8[6] = readByte();
-    doubleBufferUint8[7] = readByte();
+    _doubleBufferUint8[0] = readByte();
+    _doubleBufferUint8[1] = readByte();
+    _doubleBufferUint8[2] = readByte();
+    _doubleBufferUint8[3] = readByte();
+    _doubleBufferUint8[4] = readByte();
+    _doubleBufferUint8[5] = readByte();
+    _doubleBufferUint8[6] = readByte();
+    _doubleBufferUint8[7] = readByte();
     return _doubleBuffer[0];
   }
 
@@ -61,6 +62,18 @@ class SummaryDataReader {
     return values[index];
   }
 
+  int readInt64() {
+    _int64BufferUint8[0] = readByte();
+    _int64BufferUint8[1] = readByte();
+    _int64BufferUint8[2] = readByte();
+    _int64BufferUint8[3] = readByte();
+    _int64BufferUint8[4] = readByte();
+    _int64BufferUint8[5] = readByte();
+    _int64BufferUint8[6] = readByte();
+    _int64BufferUint8[7] = readByte();
+    return _int64Buffer[0];
+  }
+
   Map<K, V> readMap<K, V>({
     required K Function() readKey,
     required V Function() readValue,
@@ -75,6 +88,14 @@ class SummaryDataReader {
     };
   }
 
+  int? readOptionalInt64() {
+    if (readBool()) {
+      return readInt64();
+    } else {
+      return null;
+    }
+  }
+
   T? readOptionalObject<T>(T Function() read) {
     if (readBool()) {
       return read();

pkg/analyzer/lib/src/summary2/data_writer.dart

@@ -15,6 +15,9 @@ class BufferedSink {
   Uint8List _buffer = Uint8List(_SIZE);
   int _length = 0;
 
+  final Int64List _int64Buffer = Int64List(1);
+  late final Uint8List _int64BufferUint8 = _int64Buffer.buffer.asUint8List();
+
   final Float64List _doubleBuffer = Float64List(1);
   late final Uint8List _doubleBufferUint8 = _doubleBuffer.buffer.asUint8List();
 
@@ -116,6 +119,22 @@ class BufferedSink {
     }
   }
 
+  void writeInt64(int value) {
+    _int64Buffer[0] = value;
+    _addByte4(
+      _int64BufferUint8[0],
+      _int64BufferUint8[1],
+      _int64BufferUint8[2],
+      _int64BufferUint8[3],
+    );
+    _addByte4(
+      _int64BufferUint8[4],
+      _int64BufferUint8[5],
+      _int64BufferUint8[6],
+      _int64BufferUint8[7],
+    );
+  }
+
   /// Writes [items], converts to [List] first.
   void writeIterable<T>(Iterable<T> items, void Function(T x) writeItem) {
     writeList(items.toList(), writeItem);
@@ -149,6 +168,15 @@ class BufferedSink {
     }
   }
 
+  void writeOptionalInt64(int? value) {
+    if (value != null) {
+      writeBool(true);
+      writeInt64(value);
+    } else {
+      writeBool(false);
+    }
+  }
+
   void writeOptionalObject<T>(T? object, void Function(T x) write) {
     if (object != null) {
       writeBool(true);