* Match literals in a case independent way....

src/regexp-macro-assembler.h

 // Copyright 2008 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
@@ skipping 43 matching lines @@
   // character must be from start to start + length_of_bitmap_in_bits.
   virtual void CheckBitmap(
       uc16 start,           // The bitmap is indexed from this character.
       Label* bitmap,        // Where the bitmap is emitted.
       Label* on_zero) = 0;  // Where to go if the bit is 0.  Fall through on 1.
   // Dispatch after looking the current character up in a 2-bits-per-entry
   // map.  The destinations vector has up to 4 labels.
   virtual void CheckCharacter(uc16 c, Label* on_equal) = 0;
   virtual void CheckCharacterGT(uc16 limit, Label* on_greater) = 0;
   virtual void CheckCharacterLT(uc16 limit, Label* on_less) = 0;
+  // Check the current character for a match with a literal string.  If we
+  // fail to match then goto the on_failure label.  End of input always
+  // matches.  If the label is NULL then we should pop a backtrack address off
+  // the stack abnd go to that.
   virtual void CheckCharacters(
       Vector<const uc16> str,
       int cp_offset,
       Label* on_failure) = 0;
   // Check the current input position against a register.  If the register is
   // equal to the current position then go to the label.  If the label is NULL
   // then backtrack instead.
   virtual void CheckCurrentPosition(
       int register_index,
       Label* on_equal) = 0;
   virtual void CheckNotBackReference(int start_reg, Label* on_no_match) = 0;
-  // Check the current character for a match with a literal string.  If we
+  // Check the current character for a match with a literal character.  If we
   // fail to match then goto the on_failure label.  End of input always
   // matches.  If the label is NULL then we should pop a backtrack address off
   // the stack and go to that.
   virtual void CheckNotCharacter(uc16 c, Label* on_not_equal) = 0;
+  // Bitwise or the current character with the given constant and then
+  // check for a match with c.
+  virtual void CheckNotCharacterAfterOr(uc16 c,
+                                        uc16 or_with,
+                                        Label* on_not_equal) = 0;
+  // Subtract a constant from the current character, then or with the given
+  // constant and then check for a match with c.
+  virtual void CheckNotCharacterAfterMinusOr(uc16 c,
+                                             uc16 minus_then_or_with,
+                                             Label* on_not_equal) = 0;
   // Dispatch after looking the current character up in a byte map.  The
   // destinations vector has up to 256 labels.
   virtual void DispatchByteMap(
       uc16 start,
       Label* byte_map,
       const Vector<Label*>& destinations) = 0;
   virtual void DispatchHalfNibbleMap(
       uc16 start,
       Label* half_nibble_map,
       const Vector<Label*>& destinations) = 0;
@@ skipping 68 matching lines @@
   ArraySlice GetBuffer(Vector<T> values);
  private:
   size_t byte_array_size_;
   Handle<ByteArray> current_byte_array_;
   int current_byte_array_free_offset_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_REGEXP_MACRO_ASSEMBLER_H_