third_party/WebKit/Source/core/xml/parser/XMLParserInput.h

/*
 * Copyright (C) 2013 Google Inc. 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,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef XMLParserInput_h
#define XMLParserInput_h

#include "platform/wtf/Allocator.h"
#include "platform/wtf/text/WTFString.h"

namespace blink {

class XMLParserInput {
  STACK_ALLOCATED();

 public:
  explicit XMLParserInput(const String& source)
      : source_(source), encoding_(nullptr), data_(nullptr), size_(0) {
    if (source_.IsEmpty())
      return;

    const UChar kBOM = 0xFEFF;
    const unsigned char bom_high_byte =
        *reinterpret_cast<const unsigned char*>(&kBOM);

    if (source_.Is8Bit()) {
      encoding_ = "iso-8859-1";
      data_ = reinterpret_cast<const char*>(source_.Characters8());
      size_ = source_.length() * sizeof(LChar);
    } else {
      encoding_ = bom_high_byte == 0xFF ? "UTF-16LE" : "UTF-16BE";
      data_ = reinterpret_cast<const char*>(source_.Characters16());
      size_ = source_.length() * sizeof(UChar);
    }
  }

  const char* Encoding() const { return encoding_; }
  const char* Data() const { return data_; }
  int size() const { return size_; }

 private:
  String source_;
  const char* encoding_;
  const char* data_;
  int size_;
};

}  // namespace blink

#endif