Add Perl_setlocale()

khw could not find any modules on CPAN that correctly use the C library
function setlocale().  (The very few that do try, do not use it
correctly, looking at the return value incorrectly, so they are broken.)
This analysis does not include modules that call non-Perl libaries that
may call setlocale().

And, a future commit will render the setlocale() function useless in
some configurations on some platforms.

So this commit adds Perl_setlocale(), for XS code to call, and which is
always effective, but it should not be used to alter the locale except
on platforms where the predefined variable ${^SAFE_LOCALES} evaluates to
1.

This function is also what POSIX::setlocale() calls to do the real work.

1 files changed, 2 insertions, 0 deletions

diff --git a/intrpvar.h b/intrpvar.h
index 51fb16bf6b..884fa87dc6 100644
--- a/intrpvar.h
+++ b/intrpvar.h
@@ -590,6 +590,8 @@ PERLVARI(I, collation_standard, bool, TRUE)
 
 PERLVARI(I, langinfo_buf, char *, NULL)
 PERLVARI(I, langinfo_bufsize, Size_t, 0)
+PERLVARI(I, setlocale_buf, char *, NULL)
+PERLVARI(I, setlocale_bufsize, Size_t, 0)
 
 #ifdef PERL_SAWAMPERSAND
 PERLVAR(I, sawampersand, U8)		/* must save all match strings */