widen size-type variables in pack/unpack

Most size-type variables in pp_pack.c were of type I32, with a
smattering of other types.  Use SSize_t in place of I32, and generally
use size_t-width variables as appropriate.  Fixes [perl #119367].

1 files changed, 11 insertions, 0 deletions

diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index f78c0ddfe0..8ea83006a0 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -57,6 +57,12 @@ digit to appear after the radix point.  The digits are now restricted
 to those appropriate for the radix, as digits before the radix point
 always were.
 
+=head2 Return type of C<unpackstring()>
+
+The return types of the C API functions C<unpackstring()> and
+C<unpack_str()> have changed from C<I32> to C<SSize_t>, in order to
+accommodate datasets of more than two billion items.
+
 =head1 Deprecations
 
 XXX Any deprecated features, syntax, modules etc. should be listed here.
@@ -558,6 +564,11 @@ XXX
 
 =item *
 
+C<pack> and C<unpack> can now handle repeat counts and lengths that
+exceed two billion.  [perl #119367]
+
+=item *
+
 Digits past the radix point in octal and binary floating point literals
 now have the correct weight on platforms where a floating point
 significand doesn't fit into an integer type.