DragonFly On-Line Manual Pages


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 3.9 December 25, 2013 DragonFly 3.9