Remove InputBuffer

src/unicode-inl.h

 // Copyright 2007-2010 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 119 matching lines @@
     if (Utf16::IsTrailSurrogate(c) &&
         Utf16::IsLeadSurrogate(previous)) {
       return kSizeOfUnmatchedSurrogate - kBytesSavedByCombiningSurrogates;
     }
     return 3;
   } else {
     return 4;
   }
 }
 
-uchar CharacterStream::GetNext() {
-  uchar result = DecodeCharacter(buffer_, &cursor_);
-  if (remaining_ == 1) {
-    cursor_ = 0;
-    FillBuffer();
-  } else {
-    remaining_--;
-  }
-  ASSERT(BoundsCheck(cursor_));
-  return result;
-}
-
-#if __BYTE_ORDER == __LITTLE_ENDIAN
-#define IF_LITTLE(expr) expr
-#define IF_BIG(expr)    ((void) 0)
-#elif __BYTE_ORDER == __BIG_ENDIAN
-#define IF_LITTLE(expr) ((void) 0)
-#define IF_BIG(expr)    expr
-#else
-#warning Unknown byte ordering
-#endif
-
-bool CharacterStream::EncodeAsciiCharacter(uchar c, byte* buffer,
-    unsigned capacity, unsigned& offset) {
-  if (offset >= capacity) return false;
-  buffer[offset] = c;
-  offset += 1;
-  return true;
-}
-
-bool CharacterStream::EncodeNonAsciiCharacter(uchar c, byte* buffer,
-    unsigned capacity, unsigned& offset) {
-  unsigned aligned = (offset + 0x3) & ~0x3;
-  if ((aligned + sizeof(uchar)) > capacity)
-    return false;
-  if (offset == aligned) {
-    IF_LITTLE(*reinterpret_cast<uchar*>(buffer + aligned) = (c << 8) | 0x80);
-    IF_BIG(*reinterpret_cast<uchar*>(buffer + aligned) = c | (1 << 31));
-  } else {
-    buffer[offset] = 0x80;
-    IF_LITTLE(*reinterpret_cast<uchar*>(buffer + aligned) = c << 8);
-    IF_BIG(*reinterpret_cast<uchar*>(buffer + aligned) = c);
-  }
-  offset = aligned + sizeof(uchar);
-  return true;
-}
-
-bool CharacterStream::EncodeCharacter(uchar c, byte* buffer, unsigned capacity,
-    unsigned& offset) {
-  if (c <= Utf8::kMaxOneByteChar) {
-    return EncodeAsciiCharacter(c, buffer, capacity, offset);
-  } else {
-    return EncodeNonAsciiCharacter(c, buffer, capacity, offset);
-  }
-}
-
-uchar CharacterStream::DecodeCharacter(const byte* buffer, unsigned* offset) {
-  byte b = buffer[*offset];
-  if (b <= Utf8::kMaxOneByteChar) {
-    (*offset)++;
-    return b;
-  } else {
-    unsigned aligned = (*offset + 0x3) & ~0x3;
-    *offset = aligned + sizeof(uchar);
-    IF_LITTLE(return *reinterpret_cast<const uchar*>(buffer + aligned) >> 8);
-    IF_BIG(return *reinterpret_cast<const uchar*>(buffer + aligned) &
-                    ~(1 << 31));
-  }
-}
-
-#undef IF_LITTLE
-#undef IF_BIG
-
-template <class R, class I, unsigned s>
-void InputBuffer<R, I, s>::FillBuffer() {
-  buffer_ = R::ReadBlock(input_, util_buffer_, s, &remaining_, &offset_);
-}
-
-template <class R, class I, unsigned s>
-void InputBuffer<R, I, s>::Rewind() {
-  Reset(input_);
-}
-
-template <class R, class I, unsigned s>
-void InputBuffer<R, I, s>::Reset(unsigned position, I input) {
-  input_ = input;
-  remaining_ = 0;
-  cursor_ = 0;
-  offset_ = position;
-  buffer_ = R::ReadBlock(input_, util_buffer_, s, &remaining_, &offset_);
-}
-
-template <class R, class I, unsigned s>
-void InputBuffer<R, I, s>::Reset(I input) {
-  Reset(0, input);
-}
-
-template <class R, class I, unsigned s>
-void InputBuffer<R, I, s>::Seek(unsigned position) {
-  offset_ = position;
-  buffer_ = R::ReadBlock(input_, util_buffer_, s, &remaining_, &offset_);
-}
-
 Utf8DecoderBase::Utf8DecoderBase()
   : unbuffered_start_(NULL),
     utf16_length_(0),
     last_byte_of_buffer_unused_(false) {}
 
 Utf8DecoderBase::Utf8DecoderBase(uint16_t* buffer,
                                  unsigned buffer_length,
                                  const uint8_t* stream,
                                  unsigned stream_length) {
   Reset(buffer, buffer_length, stream, stream_length);
@@ skipping 30 matching lines @@
   // Copy the rest the slow way.
   WriteUtf16Slow(unbuffered_start_,
                  data + buffer_length,
                  length - buffer_length);
   return length;
 }
 
 }  // namespace unibrow
 
 #endif  // V8_UNICODE_INL_H_