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IDProjectCategoryView StatusDate SubmittedLast Update
0002503SphereServerexecutable - windows buildpublic27-04-15 21:2810-05-15 17:31
Reporterbabidi 
Assigned ToBen 
PrioritynormalSeveritymajorReproducibilityalways
StatusresolvedResolutionfixed 
PlatformOSOS Version
Product Version16-06-2013, 0.56b Prerelease 
Target VersionFixed in Version0.56c Nightly 
Summary0002503: UVAL DON'T WORK
DescriptionUVAL DID NOT WORK.

UVAL expression R Evaluates an expression and returns the result as an unsigned integer.
Steps To Reproduce[FUNCTION FTUV]
LOCAL.NEG = -1
LOCAL.NUMN = -5
LOCAL.NUMP = 5
LOCAL.FTUVA = <UVAL <LOCAL.NUMN>>
LOCAL.FTUVB = <EVAL <LOCAL.NUMN>*<LOCAL.NEG>>
LOCAL.FTUVC = <UVAL <LOCAL.NUMN>*<LOCAL.NUMP>>
SERV.B <DLOCAL.FTUVA> <DLOCAL.FTUVB> <DLOCAL.FTUVC> // EXPECTED 5 5 25 RESULT -5 5 -25
TagsNo tags attached.
Nightly VersionAutomated (specify build number)
Experimental FlagsNone
Option FlagsNone
Internal Build Number2256
Attached Files

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-  Notes
(0002771)
Coruja (developer)
28-04-15 00:59
edited on: 28-04-15 01:03

 I tried it here and it's really broken

but note that converting a NEGATIVE signed number to unsigned will not simply keep the same number and just remove the signal. Unsigned numbers cant have negative values, so when it reach the minimum value (0) it will jump to the max value (2³² = 4294967296) instead just remove the signal from the number

so unsigned -5 is 4294967291 (the same as 4294967296 - 5) and not 5

I will keep this thread open because UVAL is not really working (it just print the same value without change it to unsigned) but probably even after it got fixed, it wont work on your function as you expect

maybe you can use another workaround that simply remove the signal if the value is negative instead change it to unsigned

[FUNCTION RemoveSignal]
IF (<ARGS> < 0)
 ARGS = <STRSUB 1 0 <dARGS>>
ENDIF
return <ARGS>

so if you use <RemoveSignal -5> it will return 5. Or you can simply use an *-1 directly on your formula without need to create another function

IF (<LOCAL.A> < 0)
 LOCAL.A *= -1
ENDIF

if LOCAL.A = -5 this will change it to LOCAL.A = 5
(0002796)
Ben (manager)
10-05-15 17:31

 ok... tested, fix some issues, but really this worked as intended. The only issue I saw was that it was working with int32 while all storage variables use int64 now, so UVAL -5 = 18446744073709551611 now, not 4294967291.

Now let me explain how it works.
Locals, tags, vars... are signed int64 values.
When you save -5 to a local, it's saved as -5. (it will display as 0fffffffffffffffb in hex)
When you save 18446744073709551611, it saves as -5 (it will display as 0fffffffffffffffb in hex)
If you wish to display an unsigned value, you must use UVAL when displaying since you can't save an unsigned value to any storage variables

What you are looking for is a function called abs() which returns the number without the sign. I'll see about adding that in.

- Issue History
Date Modified Username Field Change
27-04-15 21:28 babidi New Issue
28-04-15 00:59 Coruja Note Added: 0002771
28-04-15 01:03 Coruja Note Edited: 0002771 View Revisions
10-05-15 17:31 Ben Note Added: 0002796
10-05-15 17:31 Ben Status new => resolved
10-05-15 17:31 Ben Fixed in Version => 0.56c Nightly
10-05-15 17:31 Ben Resolution open => fixed
10-05-15 17:31 Ben Assigned To => Ben

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