Extended error reporting for SVG path parsing

third_party/WebKit/Source/core/svg/SVGParserUtilities.cpp

 /*
  * Copyright (C) 2002, 2003 The Karbon Developers
  * Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
  * Copyright (C) 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2007, 2009, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 143 matching lines @@
     return genericParseNumber(ptr, end, number, mode);
 }
 
 // only used to parse largeArcFlag and sweepFlag which must be a "0" or "1"
 // and might not have any whitespace/comma after it
 template <typename CharType>
 bool genericParseArcFlag(const CharType*& ptr, const CharType* end, bool& flag)
 {
     if (ptr >= end)
         return false;
-    const CharType flagChar = *ptr++;
+    const CharType flagChar = *ptr;
     if (flagChar == '0')
         flag = false;
     else if (flagChar == '1')
         flag = true;
     else
         return false;
 
+    ptr++;
     skipOptionalSVGSpacesOrDelimiter(ptr, end);
 
     return true;
 }
 
 bool parseArcFlag(const LChar*& ptr, const LChar* end, bool& flag)
 {
     return genericParseArcFlag(ptr, end, flag);
 }
 
@@ skipping 62 matching lines @@
         const LChar* ptr = string.characters8();
         const LChar* end = ptr + string.length();
         return genericParseNumberOrPercentage(ptr, end, number);
     }
     const UChar* ptr = string.characters16();
     const UChar* end = ptr + string.length();
     return genericParseNumberOrPercentage(ptr, end, number);
 }
 
 } // namespace blink