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regexp-macro-assembler-irregexp.h
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27 
28 #ifndef V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
29 #define V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
30 
31 namespace v8 {
32 namespace internal {
33 
34 #ifdef V8_INTERPRETED_REGEXP
35 
36 class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
37  public:
38  // Create an assembler. Instructions and relocation information are emitted
39  // into a buffer, with the instructions starting from the beginning and the
40  // relocation information starting from the end of the buffer. See CodeDesc
41  // for a detailed comment on the layout (globals.h).
42  //
43  // If the provided buffer is NULL, the assembler allocates and grows its own
44  // buffer, and buffer_size determines the initial buffer size. The buffer is
45  // owned by the assembler and deallocated upon destruction of the assembler.
46  //
47  // If the provided buffer is not NULL, the assembler uses the provided buffer
48  // for code generation and assumes its size to be buffer_size. If the buffer
49  // is too small, a fatal error occurs. No deallocation of the buffer is done
50  // upon destruction of the assembler.
51  RegExpMacroAssemblerIrregexp(Vector<byte>, Zone* zone);
52  virtual ~RegExpMacroAssemblerIrregexp();
53  // The byte-code interpreter checks on each push anyway.
54  virtual int stack_limit_slack() { return 1; }
55  virtual void Bind(Label* label);
56  virtual void AdvanceCurrentPosition(int by); // Signed cp change.
57  virtual void PopCurrentPosition();
58  virtual void PushCurrentPosition();
59  virtual void Backtrack();
60  virtual void GoTo(Label* label);
61  virtual void PushBacktrack(Label* label);
62  virtual bool Succeed();
63  virtual void Fail();
64  virtual void PopRegister(int register_index);
65  virtual void PushRegister(int register_index,
66  StackCheckFlag check_stack_limit);
67  virtual void AdvanceRegister(int reg, int by); // r[reg] += by.
68  virtual void SetCurrentPositionFromEnd(int by);
69  virtual void SetRegister(int register_index, int to);
70  virtual void WriteCurrentPositionToRegister(int reg, int cp_offset);
71  virtual void ClearRegisters(int reg_from, int reg_to);
72  virtual void ReadCurrentPositionFromRegister(int reg);
73  virtual void WriteStackPointerToRegister(int reg);
74  virtual void ReadStackPointerFromRegister(int reg);
75  virtual void LoadCurrentCharacter(int cp_offset,
76  Label* on_end_of_input,
77  bool check_bounds = true,
78  int characters = 1);
79  virtual void CheckCharacter(unsigned c, Label* on_equal);
80  virtual void CheckCharacterAfterAnd(unsigned c,
81  unsigned mask,
82  Label* on_equal);
83  virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
84  virtual void CheckCharacterLT(uc16 limit, Label* on_less);
85  virtual void CheckGreedyLoop(Label* on_tos_equals_current_position);
86  virtual void CheckAtStart(Label* on_at_start);
87  virtual void CheckNotAtStart(Label* on_not_at_start);
88  virtual void CheckNotCharacter(unsigned c, Label* on_not_equal);
89  virtual void CheckNotCharacterAfterAnd(unsigned c,
90  unsigned mask,
91  Label* on_not_equal);
92  virtual void CheckNotCharacterAfterMinusAnd(uc16 c,
93  uc16 minus,
94  uc16 mask,
95  Label* on_not_equal);
96  virtual void CheckCharacterInRange(uc16 from,
97  uc16 to,
98  Label* on_in_range);
99  virtual void CheckCharacterNotInRange(uc16 from,
100  uc16 to,
101  Label* on_not_in_range);
102  virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set);
103  virtual void CheckNotBackReference(int start_reg, Label* on_no_match);
104  virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
105  Label* on_no_match);
106  virtual void CheckCharacters(Vector<const uc16> str,
107  int cp_offset,
108  Label* on_failure,
109  bool check_end_of_string);
110  virtual void IfRegisterLT(int register_index, int comparand, Label* if_lt);
111  virtual void IfRegisterGE(int register_index, int comparand, Label* if_ge);
112  virtual void IfRegisterEqPos(int register_index, Label* if_eq);
113 
114  virtual IrregexpImplementation Implementation();
115  virtual Handle<HeapObject> GetCode(Handle<String> source);
116 
117  private:
118  void Expand();
119  // Code and bitmap emission.
120  inline void EmitOrLink(Label* label);
121  inline void Emit32(uint32_t x);
122  inline void Emit16(uint32_t x);
123  inline void Emit8(uint32_t x);
124  inline void Emit(uint32_t bc, uint32_t arg);
125  // Bytecode buffer.
126  int length();
127  void Copy(Address a);
128 
129  // The buffer into which code and relocation info are generated.
130  Vector<byte> buffer_;
131  // The program counter.
132  int pc_;
133  // True if the assembler owns the buffer, false if buffer is external.
134  bool own_buffer_;
135  Label backtrack_;
136 
137  int advance_current_start_;
138  int advance_current_offset_;
139  int advance_current_end_;
140 
141  static const int kInvalidPC = -1;
142 
143  DISALLOW_IMPLICIT_CONSTRUCTORS(RegExpMacroAssemblerIrregexp);
144 };
145 
146 #endif // V8_INTERPRETED_REGEXP
147 
148 } } // namespace v8::internal
149 
150 #endif // V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
byte * Address
Definition: globals.h:157
v8::Handle< v8::Value > Fail(const v8::Arguments &args)
StringInputBuffer *const buffer_
#define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName)
Definition: globals.h:318
uint16_t uc16
Definition: globals.h:259
Handle< JSObject > Copy(Handle< JSObject > obj)
Definition: handles.cc:335