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TOLOWER(3)            DragonFly Library Functions Manual            TOLOWER(3)


NAME

     tolower, tolower_l -- upper case to lower case letter conversion


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <ctype.h>

     int
     tolower(int c);

     int
     tolower_l(int c, locale_t locale);


DESCRIPTION

     The tolower() and tolower_l() functions convert an upper-case letter to
     the corresponding lower-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 an upper-case letter, the tolower() and tolower_l()
     functions return the corresponding lower-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 towlower() and
     towlower_l() functions should be used instead.


SEE ALSO

     ctype(3), ctype_l(3), islower(3), towlower(3), towlower_l(3), xlocale(3)


STANDARDS

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

DragonFly 4.3                  December 25, 2013                 DragonFly 4.3

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