INT_STRLEN_BOUND and locales with *printf

[Ben Pfaff]

The INT_STRLEN_BOUND macro in Gnulib's intprops.h calculates the
maximum number of bytes in a formatted integer, on the basis that
the minus sign and each digit will occupy one byte.  If *printf
is used for formatting integers, is this a good assumption
outside of the C locale?  I do not see anything in the C or POSIX
standards that say whether or not %d and similar format
specifiers are allowed to use localized sign and digits.

It looks to me that glibc only localizes the results of integer
format specifiers if the glibc-specific "I" flag is present.  I
don't know whether that is true in every libc.

Thanks,

Ben.
-- 
Ben Pfaff 
http://benpfaff.org