Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked
 
PerlMonks  

Re^4: XS: returning a 64-bit unsigned int?

by ikegami (Pope)
on Sep 27, 2011 at 07:21 UTC ( #928031=note: print w/replies, xml ) Need Help??


in reply to Re^3: XS: returning a 64-bit unsigned int?
in thread XS: returning a 64-bit unsigned int?

Perl claims the right to convert among equivalent representations. It's an optimisation that an UV isn't used unless needed since UVs require extra handling.

>perl -MDevel::Peek -e"Dump(0x7FFFFFFF)" SV = IV(0x1de9d00) at 0x1de9d04 REFCNT = 1 FLAGS = (PADTMP,IOK,READONLY,pIOK) IV = 2147483647 >perl -MDevel::Peek -e"Dump(0x80000000)" SV = IV(0x4a9d00) at 0x4a9d04 REFCNT = 1 FLAGS = (PADTMP,IOK,READONLY,pIOK,IsUV) UV = 2147483648

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://928031]
help
Chatterbox?
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others browsing the Monastery: (6)
As of 2017-12-12 01:37 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    What programming language do you hate the most?




















    Results (322 votes). Check out past polls.

    Notices?