On 25 Jul 2013, at 18:40, Aaron Oneal <[email protected]> wrote:
> Can you share a code snippet? Are you using mono_object_to_string to retrieve
> the string value for display?
>
Perhaps the code below will help illustrate the point.
In C the tick count looks okay by my reckoning but the string representation is
bad:
Obj-C:
// NSLog(@"NSDate date = %@ Mono DateTime = %@ ticks = %lld", dateNow,
dateString, ticks); says
NSDate date = 2013-07-26 09:19:30 +0000 Mono DateTime = 01/01/0001 00:00:01
ticks = 635104271706805504
When I send the Mono DateTime to a C# property incoming argument gets logged as:
C#:
DateMethod arguments : 01/01/0001 00:00:01 ticks = 12436392
This is on Mono 3.0.10. I will check out 3.2.0
Obj-C:
- (void)testDateRepresentation
{
NSDate *dateNow = [NSDate date];
MonoObject *monoDateTime = [dateNow monoDateTime];
NSDate *dateFromMonoObject = [[NSDate alloc}
initWithMonoDateTime:monoDateTime];
// validate the NSDate representation
NSAssert(fabs([dateFromMonoObject timeIntervalSinceDate:dateNow]) < 0.1,
@"bad date"); // sanity check
// validate the Mono representatiom
int64_t ticks = DB_UNBOX_INT64(DBMonoObjectGetProperty(monoDateTime,
"Ticks"));
MonoString *monoString = mono_object_to_string(monoDateTime, NULL);
NSString *dateString = [NSString stringWithMonoString:monoString];
NSLog(@"NSDate date = %@ Mono DateTime = %@ ticks = %lld", dateNow,
dateString, ticks); // see output above ^
}
// NSDate
- (id)initWithMonoDateTime:(MonoObject *)monoDateTime {
MonoObject *boxedTicks = DBMonoObjectGetProperty(monoDateTime,
"Ticks");
int64_t ticks = DB_UNBOX_INT64(boxedTicks);
NSTimeInterval interval = (NSTimeInterval)(ticks -
EPOCH_START_DIFFERENCE) / NET_TICKS_PER_SECOND;
self = [self initWithTimeIntervalSinceReferenceDate:interval];
return(self);
}
// Mono property
MonoObject *DBMonoObjectGetProperty(MonoObject *monoObject, const char
*propertyName) {
MonoObject *monoException = NULL;
MonoClass *klass = mono_object_get_class(monoObject);
MonoMethod *monoMethod = GetPropertyGetMethod(klass, propertyName);
MonoObject *retval = NULL;
if(monoMethod != NULL) {
void *invokeObj = mono_class_is_valuetype(klass) ?
mono_object_unbox(monoObject) : monoObject;
retval = mono_runtime_invoke(monoMethod, invokeObj, NULL,
&monoException);
}
if(monoException != NULL)
@throw(NSExceptionFromMonoException(monoException));
return(retval);
}
C#
// date methods
public DateTime DateMethod(DateTime d1)
{
DateTime now = DateTime.UtcNow;
Console.WriteLine ("DateMethod arguments : {0} ticks = {1}", d1,
d1.Ticks);
Console.WriteLine ("DateTime Now : {0} ticks = {1}", now,
now.Ticks);
return d1;
}
Jonathan
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