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Add the (very handy) QueryAttribute

This commit is contained in:
Lee Thomason (grinliz) 2013-02-01 19:26:30 -08:00
parent 61cea67517
commit 5efaa5f6bb
2 changed files with 46 additions and 3 deletions
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40
tinyxml2.h
View File

@ -1224,7 +1224,45 @@ public:
return a->QueryFloatValue( value );
}
/// Sets the named attribute to value.
/** Given an attribute name, QueryAttribute() returns
XML_NO_ERROR, XML_WRONG_ATTRIBUTE_TYPE if the conversion
can't be performed, or XML_NO_ATTRIBUTE if the attribute
doesn't exist. It is overloaded for the primitive types,
and is a generally more convenient replacement of
QueryIntAttribute() and related functions.
If successful, the result of the conversion
will be written to 'value'. If not successful, nothing will
be written to 'value'. This allows you to provide default
value:
@verbatim
int value = 10;
QueryAttribute( "foo", &value ); // if "foo" isn't found, value will still be 10
@endverbatim
*/
int QueryAttribute( const char* name, int* value ) const {
return QueryIntAttribute( name, value );
}
int QueryAttribute( const char* name, unsigned int* value ) const {
return QueryUnsignedAttribute( name, value );
}
int QueryAttribute( const char* name, bool* value ) const {
return QueryBoolAttribute( name, value );
}
int QueryAttribute( const char* name, double* value ) const {
return QueryDoubleAttribute( name, value );
}
int QueryAttribute( const char* name, float* value ) const {
return QueryFloatAttribute( name, value );
}
/// Sets the named attribute to value.
void SetAttribute( const char* name, const char* value ) {
XMLAttribute* a = FindOrCreateAttribute( name );
a->SetAttribute( value );

9
xmltest.cpp
View File

@ -505,8 +505,8 @@ int main( int argc, const char ** argv )
XMLElement* ele = doc.FirstChildElement();
int iVal;
double dVal;
int iVal, iVal2;
double dVal, dVal2;
ele->SetAttribute( "str", "strValue" );
ele->SetAttribute( "int", 1 );
@ -516,10 +516,15 @@ int main( int argc, const char ** argv )
ele->QueryIntAttribute( "int", &iVal );
ele->QueryDoubleAttribute( "double", &dVal );
ele->QueryAttribute( "int", &iVal2 );
ele->QueryAttribute( "double", &dVal2 );
XMLTest( "Attribute match test", ele->Attribute( "str", "strValue" ), "strValue" );
XMLTest( "Attribute round trip. c-string.", "strValue", cStr );
XMLTest( "Attribute round trip. int.", 1, iVal );
XMLTest( "Attribute round trip. double.", -1, (int)dVal );
XMLTest( "Alternate query", true, iVal == iVal2 );
XMLTest( "Alternate query", true, dVal == dVal2 );
}
{