1// Copyright 2012 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28#ifndef V8_PRETTYPRINTER_H_
29#define V8_PRETTYPRINTER_H_
30
31#include "allocation.h"
32#include "ast.h"
33
34namespace v8 {
35namespace internal {
36
37#ifdef DEBUG
38
39class PrettyPrinter: public AstVisitor {
40 public:
41  explicit PrettyPrinter(Isolate* isolate);
42  virtual ~PrettyPrinter();
43
44  // The following routines print a node into a string.
45  // The result string is alive as long as the PrettyPrinter is alive.
46  const char* Print(AstNode* node);
47  const char* PrintExpression(FunctionLiteral* program);
48  const char* PrintProgram(FunctionLiteral* program);
49
50  void Print(const char* format, ...);
51
52  // Print a node to stdout.
53  static void PrintOut(Isolate* isolate, AstNode* node);
54
55  // Individual nodes
56#define DECLARE_VISIT(type) virtual void Visit##type(type* node);
57  AST_NODE_LIST(DECLARE_VISIT)
58#undef DECLARE_VISIT
59
60 private:
61  char* output_;  // output string buffer
62  int size_;  // output_ size
63  int pos_;  // current printing position
64
65 protected:
66  void Init();
67  const char* Output() const { return output_; }
68
69  virtual void PrintStatements(ZoneList<Statement*>* statements);
70  void PrintLabels(ZoneStringList* labels);
71  virtual void PrintArguments(ZoneList<Expression*>* arguments);
72  void PrintLiteral(Handle<Object> value, bool quote);
73  void PrintParameters(Scope* scope);
74  void PrintDeclarations(ZoneList<Declaration*>* declarations);
75  void PrintFunctionLiteral(FunctionLiteral* function);
76  void PrintCaseClause(CaseClause* clause);
77
78  DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
79};
80
81
82// Prints the AST structure
83class AstPrinter: public PrettyPrinter {
84 public:
85  explicit AstPrinter(Isolate* isolate);
86  virtual ~AstPrinter();
87
88  const char* PrintProgram(FunctionLiteral* program);
89
90  // Individual nodes
91#define DECLARE_VISIT(type) virtual void Visit##type(type* node);
92  AST_NODE_LIST(DECLARE_VISIT)
93#undef DECLARE_VISIT
94
95 private:
96  friend class IndentedScope;
97  void PrintIndented(const char* txt);
98  void PrintIndentedVisit(const char* s, AstNode* node);
99
100  void PrintStatements(ZoneList<Statement*>* statements);
101  void PrintDeclarations(ZoneList<Declaration*>* declarations);
102  void PrintParameters(Scope* scope);
103  void PrintArguments(ZoneList<Expression*>* arguments);
104  void PrintCaseClause(CaseClause* clause);
105  void PrintLiteralIndented(const char* info, Handle<Object> value, bool quote);
106  void PrintLiteralWithModeIndented(const char* info,
107                                    Variable* var,
108                                    Handle<Object> value);
109  void PrintLabelsIndented(ZoneStringList* labels);
110
111  void inc_indent() { indent_++; }
112  void dec_indent() { indent_--; }
113
114  int indent_;
115};
116
117#endif  // DEBUG
118
119} }  // namespace v8::internal
120
121#endif  // V8_PRETTYPRINTER_H_
122