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Postings from November 2003
On Wed, Nov 05, 2003 at 05:57:38PM -0800, Stas Bekman wrote:
> Perl_pp_sysread uses int for its offset argument. PerlIO uses Off_t for
> offsets. Should Perl_pp_sysread use Off_t as well? isn't int too small for
> reading with large file supporting systems?
PP(pp_sysread)
{
dSP; dMARK; dORIGMARK; dTARGET;
int offset;
Mmm. yes, I suspect that it should based on a cursory glance.
Or at least the correct STRLEN type (as it's the offset into the scalar)
> Off_t is alised to off_t, but off_t is not in the typemap. should it be in
> the typemap and be mapped to T_NV?
>
> Also the typemap defines:
>
> size_t T_UV
> ssize_t T_IV
>
> again aren't they too small for large filesystems?
Probably. Unless you compile perl with 64 bit ints.
> and should be T_NV?
Converting anything file size related from an integer to floating point
gives me the willies. Mainly because floating point will silently
lose precision once your files get larger than (say) 2**53
Seeking 1 byte wrong isn't that big a deal, is it?
I'm not sure that there is a good answer to any of this.
Nicholas Clark
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