/*!
Push the value of a property of an object onto the stack, ready for use e.g.
in an expression. Two parameters need to be pushed on the stack before
calling this and will be popped off the stack by this instruction before
the property value is pushed:
propertyName - The name of the property to retrieve, as a string or some
value that converts to a string.
object - The object from which to retrieve the property, as a
WILDObjectValue (i.e. isa = kLeoValueTypeWILDObject or isa = kLeoValueTypeObjectDescriptor).
(PUSH_PROPERTY_OF_OBJECT_INSTR)
*/
void LEOPushPropertyOfObjectInstruction( LEOContext* inContext )
{
LEODebugPrintContext( inContext );
LEOValuePtr theKeyPath = inContext->stackEndPtr -2;
LEOValuePtr theObject = inContext->stackEndPtr -1;
union LEOValue tmpKeyPath;
LEOInitSimpleCopy(theKeyPath, &tmpKeyPath, kLEOInvalidateReferences, inContext );
LEOCleanUpValue(theKeyPath, kLEOInvalidateReferences, inContext);
long long numKeys = LEOGetKeyCount( &tmpKeyPath, inContext );
for( long long x = 1; x <= numKeys; ++x )
{
union LEOValue tmpValue;
char indexStr[256] = {0};
snprintf( indexStr, sizeof(indexStr) -1, "%lld", x );
LEOValuePtr thePropertyName = LEOGetValueForKey( &tmpKeyPath, indexStr, &tmpValue, kLEOInvalidateReferences, inContext );
char propNameStr[1024] = { 0 };
LEOGetValueAsString( thePropertyName, propNameStr, sizeof(propNameStr), inContext );
LEOValuePtr foundObject = LEOGetValueForKey( theObject, propNameStr, &tmpValue, kLEOInvalidateReferences, inContext );
theObject = foundObject;
}
LEODebugPrintContext( inContext );
union LEOValue tmp = *theKeyPath;
*theKeyPath = *theObject;
*theObject = tmp;
LEOCleanUpStackToPtr( inContext, inContext->stackEndPtr -1 );
LEODebugPrintContext( inContext );
inContext->currentInstruction++;
}
void LEOPrintInstruction( LEOContext* inContext )
{
char buf[1024] = { 0 };
bool popOffStack = (inContext->currentInstruction->param1 == BACK_OF_STACK);
union LEOValue* theValue = popOffStack ? (inContext->stackEndPtr -1) : (inContext->stackBasePtr +inContext->currentInstruction->param1);
LEOGetValueAsString( theValue, buf, sizeof(buf), inContext );
printf( "%s\n", buf );
if( popOffStack )
LEOCleanUpStackToPtr( inContext, inContext->stackEndPtr -1 );
inContext->currentInstruction++;
}
/*!
Change the value of a particular property of an object. Three parameters must
have been pushed on the stack before this instruction is called, and will be
popped off the stack:
propertyName - An array containing names of the properties to change, as an array
of string values or values that convert to a string. If more than
one item is passed, the code will descend into the object and set
the keys in the array.
object - The object to change the property on. This must be a
WILDObjectValue (i.e. isa = kLeoValueTypeWILDObject or isa = kLeoValueTypeObjectDescriptor).
value - The new value to assign to the given property.
(SET_PROPERTY_OF_OBJECT_INSTR)
*/
void LEOSetPropertyOfObjectInstruction( LEOContext* inContext )
{
LEOValuePtr theValue = inContext->stackEndPtr -1;
LEOValuePtr theObject = inContext->stackEndPtr -2;
LEOValuePtr theKeyPath = inContext->stackEndPtr -3;
LEODebugPrintContext( inContext );
long long numKeys = LEOGetKeyCount( theKeyPath, inContext );
for( long long x = 1; x <= numKeys; ++x )
{
union LEOValue tmpValue;
char indexStr[256] = {0};
snprintf( indexStr, sizeof(indexStr) -1, "%lld", x );
LEOValuePtr thePropertyName = LEOGetValueForKey( theKeyPath, indexStr, &tmpValue, kLEOInvalidateReferences, inContext );
char propNameStr[1024] = { 0 };
LEOGetValueAsString( thePropertyName, propNameStr, sizeof(propNameStr), inContext );
LEOValuePtr foundObject = LEOGetValueForKey( theObject, propNameStr, &tmpValue, kLEOInvalidateReferences, inContext );
if( !foundObject )
{
inContext->flags |= kLEOContextKeepRunning;
inContext->errMsg[0] = 0;
union LEOValue emptyValue;
LEOInitStringConstantValue( &emptyValue, "", kLEOInvalidateReferences, inContext );
LEOSetValueForKey( theObject, propNameStr, &emptyValue, inContext );
LEOCleanUpValue( &emptyValue, kLEOInvalidateReferences, inContext );
foundObject = LEOGetValueForKey( theObject, propNameStr, &tmpValue, kLEOInvalidateReferences, inContext );
}
theObject = foundObject;
}
LEOPutValueIntoValue( theValue, theObject, inContext );
LEOCleanUpStackToPtr( inContext, inContext->stackEndPtr -3 );
inContext->currentInstruction++;
LEODebugPrintContext( inContext );
}