pkg/kernel/lib/binary/loader.dart - Issue 2665723002: Implement canonical name scheme in kernel.

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Issue 2665723002: Implement canonical name scheme in kernel. (Closed)

Patch Set: Address Kevin's comments Created 3 years, 10 months ago

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1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file

2 // for details. All rights reserved. Use of this source code is governed by a

3 // BSD-style license that can be found in the LICENSE file.

4 library kernel.binary.loader;

5

6 import '../repository.dart';

7 import '../ast.dart';

8 import 'tag.dart';

9 import 'dart:io';

10 import 'ast_from_binary.dart';

11

12 abstract class BinaryReferenceLoader {

13 Library getLibraryReference(Library from, String relativePath);

14 Class getClassReference(Library library, int tag, int index);

15 Member getMemberReference(TreeNode classOrLibrary, int tag, int index);

16 Member getLibraryMemberReference(Library library, int tag, int index);

17 Member getClassMemberReference(Class classNode, int tag, int index);

18 }

19

20 class BinaryLoader implements BinaryReferenceLoader {

21 final Repository repository;

22

23 BinaryLoader(this.repository);

24

25 Library getLibraryReference(Library from, String relativePath) {

26 var fullUri = from.importUri.resolve(relativePath);

27 return repository.getLibraryReference(fullUri);

28 }

29

30 static int _pow2roundup(int x) {

31 --x;

32 x \|= x >> 1;

33 x \|= x >> 2;

34 x \|= x >> 4;

35 x \|= x >> 8;

36 x \|= x >> 16;

37 return x + 1;

38 }

39

40 TreeNode _extendList(

41 TreeNode parent, List<TreeNode> items, int index, TreeNode build()) {

42 if (items.length <= index) {

43 // Avoid excessive resizing by growing the list in steps.

44 items.length = _pow2roundup(index + 1);

45 }

46 return items[index] ??= build()..parent = parent;

47 }

48

49 Class getClassReference(Library library, int tag, int index) {

50 return _extendList(

51 library, library.classes, index, () => _buildClassReference(tag));

52 }

53

54 Class _buildClassReference(int tag) {

55 return new Class();

56 }

57

58 Field _buildFieldReference() {

59 return new Field(null);

60 }

61

62 Constructor _buildConstructorReference() {

63 return new Constructor(null);

64 }

65

66 Procedure _buildProcedureReference() {

67 return new Procedure(null, null, null);

68 }

69

70 Member getMemberReference(TreeNode classOrLibrary, int tag, int index) {

71 if (classOrLibrary is Class) {

72 return getClassMemberReference(classOrLibrary, tag, index);

73 } else {

74 return getLibraryMemberReference(classOrLibrary, tag, index);

75 }

76 }

77

78 Member getLibraryMemberReference(Library library, int tag, int index) {

79 switch (tag) {

80 case Tag.LibraryFieldReference:

81 case Tag.Field:

82 return _extendList(

83 library, library.fields, index, _buildFieldReference);

84 case Tag.LibraryProcedureReference:

85 case Tag.Procedure:

86 return _extendList(

87 library, library.procedures, index, _buildProcedureReference);

88 default:

89 throw 'Invalid library member reference tag: $tag';

90 }

91 }

92

93 Member getClassMemberReference(Class classNode, int tag, int index) {

94 switch (tag) {

95 case Tag.ClassFieldReference:

96 case Tag.Field:

97 return _extendList(

98 classNode, classNode.fields, index, _buildFieldReference);

99 case Tag.ClassConstructorReference:

100 case Tag.Constructor:

101 return _extendList(classNode, classNode.constructors, index,

102 _buildConstructorReference);

103 case Tag.ClassProcedureReference:

104 case Tag.Procedure:

105 return _extendList(

106 classNode, classNode.procedures, index, _buildProcedureReference);

107 default:

108 throw 'Invalid library member reference tag: $tag';

109 }

110 }

111

112 Program loadProgram(String filename) {

113 var bytes = new File(filename).readAsBytesSync();

114 return new BinaryBuilder(this, bytes, filename).readProgramFile();

115 }

116 }

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