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TOUPPER(3)            DragonFly Library Functions Manual            TOUPPER(3)


NAME

     toupper, toupper_l -- lower case to upper case letter conversion


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <ctype.h>

     int
     toupper(int c);

     int
     toupper_l(int c, locale_t locale);


DESCRIPTION

     The toupper() and toupper_l() functions convert a lower-case letter to
     the corresponding upper-case letter.  The argument must be representable
     as an unsigned char or the value of EOF.

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


RETURN VALUES

     If the argument is a lower-case letter, the toupper() and toupper_l()
     functions return the corresponding upper-case letter if there is one;
     otherwise, the argument is returned unchanged.


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 towupper() and
     towupper_l() functions should be used instead.


SEE ALSO

     ctype(3), ctype_l(3), isupper(3), towupper(3), towupper_l(3), xlocale(3)


STANDARDS

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

DragonFly 4.3                  December 25, 2013                 DragonFly 4.3

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