content/svg/content/src/nsSVGDataParser.h
author Jonathan Watt <jwatt@jwatt.org>
Thu, 26 Jan 2012 09:57:21 +0000
changeset 88281 e31b47c574bff4c89cff38855b40a56865092388
parent 79445 e7854b4d29ba905ae3994f821b160c989bac4260
child 98983 f4157e8c410708d76703f19e4dfb61859bfe32d8
child 112490 5f86dd728a3c9935f95b0e1a3cde2de68a346af3
permissions -rw-r--r--
Bug 721131 - Speed up build in content/svg/content/src - clean up #include directives in its header files. r=dholbert.

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Mozilla SVG project.
 *
 * The Initial Developer of the Original Code is
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 * the Initial Developer. All Rights Reserved.
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#ifndef __NS_SVGDATAPARSER_H__
#define __NS_SVGDATAPARSER_H__

#include "nsError.h"

class nsAString;

//----------------------------------------------------------------------
// helper macros
#define ENSURE_MATCHED(exp) { nsresult rv = exp; if (NS_FAILED(rv)) return rv; }

////////////////////////////////////////////////////////////////////////
// nsSVGDataParser: a simple abstract class for parsing values
// for path and transform values.
// 
class nsSVGDataParser
{
public:
  nsresult Parse(const nsAString &aValue);

protected:
  const char* mInputPos;
  
  const char* mTokenPos;
  enum { DIGIT, WSP, COMMA, POINT, SIGN, LEFT_PAREN, RIGHT_PAREN, OTHER, END } mTokenType;
  char mTokenVal;

  // helpers
  void GetNextToken();
  void RewindTo(const char* aPos);
  virtual nsresult Match()=0;

  nsresult MatchNonNegativeNumber(float* aX);
  bool IsTokenNonNegativeNumberStarter();
  
  nsresult MatchNumber(float* x);
  bool IsTokenNumberStarter();
  
  nsresult MatchCommaWsp();
  bool IsTokenCommaWspStarter();
  
  nsresult MatchIntegerConst();
  
  nsresult MatchFloatingPointConst();
  
  nsresult MatchFractConst();
  
  nsresult MatchExponent();
  bool IsTokenExponentStarter();
  
  nsresult MatchDigitSeq();
  bool IsTokenDigitSeqStarter();
  
  nsresult MatchWsp();
  bool IsTokenWspStarter();

  nsresult MatchLeftParen();
  nsresult MatchRightParen();
};


#endif // __NS_SVGDATAPARSER_H__