Re^6: How get PV address?

Hence a plain integer gets upgraded to an IV/UV before being assigned to the SV.

That's what I thought before, but as above, in typemap, unsigned int also use sv_setnv function. Does it mean sv_setnv function wouldn't upgrade an IV to UV silently if it get a unsigned integer?

I am trying to improve my English skills, if you see a mistake please feel free to reply or /msg me a correction

Comment on Re^6: How get PV address?

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Re^7: How get PV address? by dave_the_m (Monsignor) on Aug 06, 2019 at 10:03 UTC
I don't understand why you are now talking about sv_setnv(): this doesn't appear in the typemap you showed above. The standard typemap for outputting integer values will do either sv_setiv($arg, (IV)$var) or sv_setuv($arg, (UV)$var) depending on whether the integer type is signed or not. The IV or UV types are usually defined as being the largest integer type that the compiler supports: they're large enough to hold a pointer, and often larger than a plain int (8 bytes versus 4 bytes). Dave.	[reply]
Re^8: How get PV address? by xiaoyafeng (Deacon) on Aug 06, 2019 at 12:55 UTC
I don't understand why you are now talking about sv_setnv(): this doesn't appear in the typemap you showed above. Sorry, I mean sv_setuv. The standard typemap for outputting integer values will do either sv_setiv($arg, (IV)$var) or sv_setuv($arg, (UV)$var) depending on whether the integer type is signed or not. The IV or UV types are usually defined as being the largest integer type that the compiler supports: they're large enough to hold a pointer, and often larger than a plain int (8 bytes versus 4 bytes). Oh, I fully understand it! Thanks so much for your patient answer! I am trying to improve my English skills, if you see a mistake please feel free to reply or /msg me a correction	[reply]


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