Error string re-work
diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index dcf2a43..1b54017 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -165,6 +165,7 @@
     _end = 0;

 }

 

+

 void StrPair::Reset()

 {

     if ( _flags & NEEDS_DELETE ) {

@@ -1018,7 +1019,7 @@
         if ( !p ) {

             DeleteNode( node );

             if ( !_document->Error() ) {

-                _document->SetError( XML_ERROR_PARSING, 0, 0, initialLineNum);

+                _document->SetError( XML_ERROR_PARSING, initialLineNum, 0);

             }

             break;

         }

@@ -1038,7 +1039,7 @@
                 }

             }

             if ( !wellLocated ) {

-                _document->SetError( XML_ERROR_PARSING_DECLARATION, decl->Value(), 0, initialLineNum);

+                _document->SetError( XML_ERROR_PARSING_DECLARATION, initialLineNum, "value: %s", decl->Value());

                 DeleteNode( node );

                 break;

             }

@@ -1073,7 +1074,7 @@
                 }

             }

             if ( mismatch ) {

-                _document->SetError( XML_ERROR_MISMATCHED_ELEMENT, ele->Name(), 0, initialLineNum);

+                _document->SetError( XML_ERROR_MISMATCHED_ELEMENT, initialLineNum, "name=%s", ele->Name());

                 DeleteNode( node );

                 break;

             }

@@ -1134,7 +1135,7 @@
     if ( this->CData() ) {

         p = _value.ParseText( p, "]]>", StrPair::NEEDS_NEWLINE_NORMALIZATION, curLineNumPtr );

         if ( !p ) {

-            _document->SetError( XML_ERROR_PARSING_CDATA, start, 0, _parseLineNum );

+            _document->SetError( XML_ERROR_PARSING_CDATA, _parseLineNum, 0 );

         }

         return p;

     }

@@ -1149,7 +1150,7 @@
             return p-1;

         }

         if ( !p ) {

-            _document->SetError( XML_ERROR_PARSING_TEXT, start, 0, _parseLineNum );

+            _document->SetError( XML_ERROR_PARSING_TEXT, _parseLineNum, 0 );

         }

     }

     return 0;

@@ -1200,7 +1201,7 @@
     const char* start = p;

     p = _value.ParseText( p, "-->", StrPair::COMMENT, curLineNumPtr );

     if ( p == 0 ) {

-        _document->SetError( XML_ERROR_PARSING_COMMENT, start, 0, _parseLineNum );

+        _document->SetError( XML_ERROR_PARSING_COMMENT, _parseLineNum, 0 );

     }

     return p;

 }

@@ -1250,7 +1251,7 @@
     const char* start = p;

     p = _value.ParseText( p, "?>", StrPair::NEEDS_NEWLINE_NORMALIZATION, curLineNumPtr );

     if ( p == 0 ) {

-        _document->SetError( XML_ERROR_PARSING_DECLARATION, start, 0, _parseLineNum );

+        _document->SetError( XML_ERROR_PARSING_DECLARATION, _parseLineNum, 0 );

     }

     return p;

 }

@@ -1300,7 +1301,7 @@
 

     p = _value.ParseText( p, ">", StrPair::NEEDS_NEWLINE_NORMALIZATION, curLineNumPtr );

     if ( !p ) {

-        _document->SetError( XML_ERROR_PARSING_UNKNOWN, start, 0, _parseLineNum );

+        _document->SetError( XML_ERROR_PARSING_UNKNOWN, _parseLineNum, 0 );

     }

     return p;

 }

@@ -1810,7 +1811,7 @@
     while( p ) {

         p = XMLUtil::SkipWhiteSpace( p, curLineNumPtr );

         if ( !(*p) ) {

-            _document->SetError( XML_ERROR_PARSING_ELEMENT, start, Name(), _parseLineNum );

+            _document->SetError( XML_ERROR_PARSING_ELEMENT, _parseLineNum, "element name=%s", Name() );

             return 0;

         }

 

@@ -1825,7 +1826,7 @@
             p = attrib->ParseDeep( p, _document->ProcessEntities(), curLineNumPtr );

             if ( !p || Attribute( attrib->Name() ) ) {

                 DeleteAttribute( attrib );

-                _document->SetError( XML_ERROR_PARSING_ATTRIBUTE, start, p, attrLineNum );

+                _document->SetError( XML_ERROR_PARSING_ATTRIBUTE, attrLineNum, "element name=%s", Name() );

                 return 0;

             }

             // There is a minor bug here: if the attribute in the source xml

@@ -1854,7 +1855,7 @@
             return p+2;	// done; sealed element.

         }

         else {

-            _document->SetError( XML_ERROR_PARSING_ELEMENT, start, p, _parseLineNum );

+            _document->SetError( XML_ERROR_PARSING_ELEMENT, _parseLineNum, 0 );

             return 0;

         }

     }

@@ -2152,7 +2153,7 @@
     Clear();

     FILE* fp = callfopen( filename, "rb" );

     if ( !fp ) {

-        SetError( XML_ERROR_FILE_NOT_FOUND, filename, 0, 0 );

+        SetError( XML_ERROR_FILE_NOT_FOUND, 0, "filename=%s", filename );

         return _errorID;

     }

     LoadFile( fp );

@@ -2189,7 +2190,7 @@
 

     fseek( fp, 0, SEEK_SET );

     if ( fgetc( fp ) == EOF && ferror( fp ) != 0 ) {

-        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0, 0 );

+        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0 );

         return _errorID;

     }

 

@@ -2197,19 +2198,19 @@
     const long filelength = ftell( fp );

     fseek( fp, 0, SEEK_SET );

     if ( filelength == -1L ) {

-        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0, 0 );

+        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0 );

         return _errorID;

     }

     TIXMLASSERT( filelength >= 0 );

 

     if ( !LongFitsIntoSizeTMinusOne<>::Fits( filelength ) ) {

         // Cannot handle files which won't fit in buffer together with null terminator

-        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0, 0 );

+        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0 );

         return _errorID;

     }

 

     if ( filelength == 0 ) {

-        SetError( XML_ERROR_EMPTY_DOCUMENT, 0, 0, 0 );

+        SetError( XML_ERROR_EMPTY_DOCUMENT, 0, 0 );

         return _errorID;

     }

 

@@ -2218,7 +2219,7 @@
     _charBuffer = new char[size+1];

     size_t read = fread( _charBuffer, 1, size, fp );

     if ( read != size ) {

-        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0, 0 );

+        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0 );

         return _errorID;

     }

 

@@ -2233,7 +2234,7 @@
 {

     FILE* fp = callfopen( filename, "w" );

     if ( !fp ) {

-        SetError( XML_ERROR_FILE_COULD_NOT_BE_OPENED, filename, 0, 0 );

+        SetError( XML_ERROR_FILE_COULD_NOT_BE_OPENED, 0, "filename=%s", filename );

         return _errorID;

     }

     SaveFile(fp, compact);

@@ -2258,7 +2259,7 @@
     Clear();

 

     if ( len == 0 || !p || !*p ) {

-        SetError( XML_ERROR_EMPTY_DOCUMENT, 0, 0, 0 );

+        SetError( XML_ERROR_EMPTY_DOCUMENT, 0, 0 );

         return _errorID;

     }

     if ( len == (size_t)(-1) ) {

@@ -2296,21 +2297,29 @@
 }

 

 

-void XMLDocument::SetError( XMLError error, const char* str1, const char* str2, int lineNum )

+void XMLDocument::SetError( XMLError error, int lineNum, const char* format, ... )

 {

     TIXMLASSERT( error >= 0 && error < XML_ERROR_COUNT );

     _errorID = error;

-	

-	_errorStr1.Reset();

-	_errorStr2.Reset();

-    _errorLineNum = lineNum;

+	_errorStr.Reset();

 

-	if (str1)

-		_errorStr1.SetStr(str1);

-	if (str2)

-		_errorStr2.SetStr(str2);

+    if (format) {

+        size_t BUFFER_SIZE = 1000;

+        char* buffer = new char[BUFFER_SIZE];

+        TIXML_SNPRINTF(buffer, BUFFER_SIZE, "Error=%s ErrorID=%d line=%d ", ErrorIDToName(error), int(error), lineNum);

+        size_t len = strlen(buffer);

+

+        va_list va;

+        va_start( va, format );

+        int result = TIXML_VSNPRINTF( buffer + len, BUFFER_SIZE - len, format, va );

+        va_end( va );

+

+        _errorStr.SetStr(buffer);

+        delete [] buffer;

+    }

 }

 

+

 /*static*/ const char* XMLDocument::ErrorIDToName(XMLError errorID)

 {

 	TIXMLASSERT( errorID >= 0 && errorID < XML_ERROR_COUNT );

@@ -2319,14 +2328,9 @@
     return errorName;

 }

 

-const char* XMLDocument::GetErrorStr1() const 

+const char* XMLDocument::GetErrorStr() const 

 {

-	return _errorStr1.GetStr();

-}

-

-const char* XMLDocument::GetErrorStr2() const 

-{

-	return _errorStr2.GetStr();

+	return _errorStr.Empty() ? "" : _errorStr.GetStr();

 }

 

 const char* XMLDocument::ErrorName() const

@@ -2341,13 +2345,9 @@
         char buf1[LEN] = { 0 };

         char buf2[LEN] = { 0 };

 

-        if ( !_errorStr1.Empty() ) {

-            TIXML_SNPRINTF( buf1, LEN, "%s", _errorStr1.GetStr() );

+        if ( !_errorStr.Empty() ) {

+            TIXML_SNPRINTF( buf1, LEN, "%s", _errorStr.GetStr() );

         }

-        if ( !_errorStr2.Empty() ) {

-            TIXML_SNPRINTF( buf2, LEN, "%s", _errorStr2.GetStr() );

-        }

-

         // Should check INT_MIN <= _errorID && _errorId <= INT_MAX, but that

         // causes a clang "always true" -Wtautological-constant-out-of-range-compare warning

         TIXMLASSERT( 0 <= _errorID && XML_ERROR_COUNT - 1 <= INT_MAX );

@@ -2366,7 +2366,7 @@
     p = XMLUtil::SkipWhiteSpace( p, &_parseCurLineNum );

     p = const_cast<char*>( XMLUtil::ReadBOM( p, &_writeBOM ) );

     if ( !*p ) {

-        SetError( XML_ERROR_EMPTY_DOCUMENT, 0, 0, 0 );

+        SetError( XML_ERROR_EMPTY_DOCUMENT, 0, 0 );

         return;

     }

     ParseDeep(p, 0, &_parseCurLineNum );