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authorChip Salzenberg <chip@pobox.com>2012-06-22 15:18:18 -0700
committerChip Salzenberg <chip@pobox.com>2012-07-15 15:29:02 -0700
commit4bac9ae47b5ad7845a24e26b0e95609805de688a (patch)
tree3ec050044b0c6d7f3688cd9037e85d10c601eb78 /utfebcdic.h
parentb8a55fe78ae4ecc0a81a2d98dba9fead6df06efb (diff)
downloadperl-4bac9ae47b5ad7845a24e26b0e95609805de688a.tar.gz
Magic flags harmonization.
In restore_magic(), which is called after any magic processing, all of the public OK flags have been shifted into the private OK flags. Thus the lack of an appropriate public OK flags was used to trigger both get magic and required conversions. This scheme did not cover ROK, however, so all properly written code had to make sure mg_get was called the right number of times anyway. Meanwhile the private OK flags gained a second purpose of marking converted but non-authoritative values (e.g. the IV conversion of an NV), and the inadequate flag shift mechanic broke this in some cases. This patch removes the shift mechanic for magic flags, thus exposing (and fixing) some improper usage of magic SVs in which mg_get() was not called correctly. It also has the side effect of making magic get functions specifically set their SVs to undef if that is desired, as the new behavior of empty get functions is to leave the value unchanged. This is a feature, as now get magic that does not modify its value, e.g. tainting, does not have to be special cased. The changes to cpan/ here are only temporary, for development only, to keep blead working until upstream applies them (or something like them). Thanks to Rik and Father C for review input.
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