DragonFly On-Line Manual Pages

ISUPPER(3)            DragonFly Library Functions Manual            ISUPPER(3)

NAME
     isupper, isupper_l -- upper-case character test

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     isupper(int c);

     int

     isupper_l int c locale_t locale

DESCRIPTION
     The isupper() and isupper_l() functions tests for any upper-case letter.
     The value of the argument must be representable as an unsigned char or
     the value of EOF.

     In the ASCII character set, this includes the following characters (with
     their numeric values shown in octal):

     101 ``A''     102 ``B''     103 ``C''     104 ``D''     105 ``E''
     106 ``F''     107 ``G''     110 ``H''     111 ``I''     112 ``J''
     113 ``K''     114 ``L''     115 ``M''     116 ``N''     117 ``O''
     120 ``P''     121 ``Q''     122 ``R''     123 ``S''     124 ``T''
     125 ``U''     126 ``V''     127 ``W''     130 ``X''     131 ``Y''
     132 ``Z''

     The _l-suffixed version takes an explicit locale argument, whereas the
     non-suffixed version uses the current global or per-thread locale.

RETURN VALUES
     The isupper() and isupper_l() functions return zero if the character
     tests false and returns non-zero if the character tests true.

COMPATIBILITY
     The 4.4BSD extension of accepting arguments outside of the range of the
     unsigned char type in locales with large character sets is considered
     obsolete and may not be supported in future releases.  The iswupper() and
     iswupper_l() functions should be used instead.

SEE ALSO
     ctype(3), ctype_l(3), iswupper(3), iswupper_l(3), toupper(3), xlocale(3),
     ascii(7)

STANDARDS
     The isupper() function conforms to ISO/IEC 9899:1990 (``ISO C90'').  The
     isupper_l() function conforms to IEEE Std 1003.1-2008 (``POSIX.1'').

DragonFly 4.3                  December 25, 2013                 DragonFly 4.3