LineParser.h

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#ifndef _NEW_EAGLE_LINEPARSER_H
#define _NEW_EAGLE_LINEPARSER_H

#include <ros/ros.h>

#include <string>
#include <exception>
#include <ctype.h>

namespace NewEagle
{
  class LineParserExceptionBase: public std::exception
  {
  };

  class LineParserAtEOLException: public LineParserExceptionBase
  {
    virtual const char* what() const throw()
    {
      return "Unexpected end of line.";
    }
  };

  class LineParserLenZeroException: public LineParserExceptionBase
  {
    virtual const char* what() const throw()
    {
      return "Nothing found in search space.";
    }
  };

  class LineParserInvalidCharException: public LineParserExceptionBase
  {
    virtual const char* what() const throw()
    {
      return "Invalid character(s) search space.";
    }
  };

  enum ReadDoubleState
  {
    READING_WHOLE_NUMBER = 0,
    READING_FRACTION = 1,
    READ_E = 2,
    READ_SIGN = 3,
    READING_EXP = 4
  };

  class LineParser
  {
    public:
      LineParser(const std::string &line);
      ~LineParser();

      int32_t GetPosition();
      std::string ReadCIdentifier();
      std::string ReadCIdentifier(std::string fieldName);
      uint32_t ReadUInt();
      uint32_t ReadUInt(std::string fieldName);
      void SeekSeparator(char separator);
      char ReadNextChar(std::string fieldName);
      int32_t ReadInt();
      double ReadDouble();
      double ReadDouble(std::string fieldName);
      std::string ReadQuotedString();
      uint32_t PeekUInt();

    private:
      int32_t _position;
      std::string _line;

      void SkipWhitespace();
      bool AtEOL();
      char ReadNextChar();
  };
}

#endif // _NEW_EAGLE_LINEPARSER_H