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-/*
- * Copyright 2009, 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,
- * 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.
- */
-
-
-// This file contains the declaration of class TextReader.
-
-#ifndef O3D_UTILS_CROSS_TEXT_READER_H_
-#define O3D_UTILS_CROSS_TEXT_READER_H_
-
-#include <string>
-#include "base/basictypes.h"
-
-namespace o3d {
-
-// TextReader is the abstract base class of classes
-// that read a sequence of characters to an underlying
-// medium.
-class TextReader {
- public:
- // Construct a new TextReader.
- TextReader();
- virtual ~TextReader();
-
- // Returns true if at the end of the input.
- virtual bool IsAtEnd() const = 0;
-
- // Read ahead up to count characters and return them as a string,
- // but don't modify the input's current position. Returns the empty
- // string if at the end of the input.
- virtual std::string PeekString(std::string::size_type count) const = 0;
-
- // Read a single character.
- virtual char ReadChar() = 0;
-
- // Read a number of characters as a string. If the input isn't that
- // long, the string may be shorter than the given number of
- // characters. Returns an empty string if it is already at the end
- // of the input or if there is an error.
- virtual std::string ReadString(std::string::size_type count) = 0;
-
- // Read a line of text, terminated by any kind of line terminator
- // (LF/CRLF/CR). Returns the empty string if at end of input, or if
- // there is an error.
- virtual std::string ReadLine() = 0;
-
- // Read the remaining file into a string, linefeeds and all.
- // Returns the empty string if already at the end of the file or
- // there is an error.
- virtual std::string ReadToEnd() = 0;
-
- protected:
- // Returns length of EOL marker (one or two characters) if the given
- // character string starts with an end of line marker. Returns zero
- // if there is no EOL marker at the BEGINNING of the string.
- static int TestForEndOfLine(const std::string& eol);
-
- private:
-
- DISALLOW_COPY_AND_ASSIGN(TextReader);
-};
-} // namespace o3d
-
-#endif // O3D_UTILS_CROSS_TEXT_READER_H_