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// Copyright 2008-2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
#define V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
namespace v8 {
namespace internal {
#ifdef V8_INTERPRETED_REGEXP
class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
public:
// Create an assembler. Instructions and relocation information are emitted
// into a buffer, with the instructions starting from the beginning and the
// relocation information starting from the end of the buffer. See CodeDesc
// for a detailed comment on the layout (globals.h).
//
// If the provided buffer is NULL, the assembler allocates and grows its own
// buffer, and buffer_size determines the initial buffer size. The buffer is
// owned by the assembler and deallocated upon destruction of the assembler.
//
// If the provided buffer is not NULL, the assembler uses the provided buffer
// for code generation and assumes its size to be buffer_size. If the buffer
// is too small, a fatal error occurs. No deallocation of the buffer is done
// upon destruction of the assembler.
explicit RegExpMacroAssemblerIrregexp(Vector<byte>);
virtual ~RegExpMacroAssemblerIrregexp();
// The byte-code interpreter checks on each push anyway.
virtual int stack_limit_slack() { return 1; }
virtual void Bind(Label* label);
virtual void AdvanceCurrentPosition(int by); // Signed cp change.
virtual void PopCurrentPosition();
virtual void PushCurrentPosition();
virtual void Backtrack();
virtual void GoTo(Label* label);
virtual void PushBacktrack(Label* label);
virtual void Succeed();
virtual void Fail();
virtual void PopRegister(int register_index);
virtual void PushRegister(int register_index,
StackCheckFlag check_stack_limit);
virtual void AdvanceRegister(int reg, int by); // r[reg] += by.
virtual void SetCurrentPositionFromEnd(int by);
virtual void SetRegister(int register_index, int to);
virtual void WriteCurrentPositionToRegister(int reg, int cp_offset);
virtual void ClearRegisters(int reg_from, int reg_to);
virtual void ReadCurrentPositionFromRegister(int reg);
virtual void WriteStackPointerToRegister(int reg);
virtual void ReadStackPointerFromRegister(int reg);
virtual void LoadCurrentCharacter(int cp_offset,
Label* on_end_of_input,
bool check_bounds = true,
int characters = 1);
virtual void CheckCharacter(unsigned c, Label* on_equal);
virtual void CheckCharacterAfterAnd(unsigned c,
unsigned mask,
Label* on_equal);
virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
virtual void CheckCharacterLT(uc16 limit, Label* on_less);
virtual void CheckGreedyLoop(Label* on_tos_equals_current_position);
virtual void CheckAtStart(Label* on_at_start);
virtual void CheckNotAtStart(Label* on_not_at_start);
virtual void CheckNotCharacter(unsigned c, Label* on_not_equal);
virtual void CheckNotCharacterAfterAnd(unsigned c,
unsigned mask,
Label* on_not_equal);
virtual void CheckNotCharacterAfterMinusAnd(uc16 c,
uc16 minus,
uc16 mask,
Label* on_not_equal);
virtual void CheckCharacterInRange(uc16 from,
uc16 to,
Label* on_in_range);
virtual void CheckCharacterNotInRange(uc16 from,
uc16 to,
Label* on_not_in_range);
virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set);
virtual void CheckNotBackReference(int start_reg, Label* on_no_match);
virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
Label* on_no_match);
virtual void CheckNotRegistersEqual(int reg1, int reg2, Label* on_not_equal);
virtual void CheckCharacters(Vector<const uc16> str,
int cp_offset,
Label* on_failure,
bool check_end_of_string);
virtual void IfRegisterLT(int register_index, int comparand, Label* if_lt);
virtual void IfRegisterGE(int register_index, int comparand, Label* if_ge);
virtual void IfRegisterEqPos(int register_index, Label* if_eq);
virtual IrregexpImplementation Implementation();
virtual Handle<HeapObject> GetCode(Handle<String> source);
private:
void Expand();
// Code and bitmap emission.
inline void EmitOrLink(Label* label);
inline void Emit32(uint32_t x);
inline void Emit16(uint32_t x);
inline void Emit8(uint32_t x);
inline void Emit(uint32_t bc, uint32_t arg);
// Bytecode buffer.
int length();
void Copy(Address a);
// The buffer into which code and relocation info are generated.
Vector<byte> buffer_;
// The program counter.
int pc_;
// True if the assembler owns the buffer, false if buffer is external.
bool own_buffer_;
Label backtrack_;
int advance_current_start_;
int advance_current_offset_;
int advance_current_end_;
static const int kInvalidPC = -1;
DISALLOW_IMPLICIT_CONSTRUCTORS(RegExpMacroAssemblerIrregexp);
};
#endif // V8_INTERPRETED_REGEXP
} } // namespace v8::internal
#endif // V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
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