ADC Home > Reference Library > Reference > Mac OS X > Mac OS X Man Pages
|
This document is a Mac OS X manual page. Manual pages are a command-line technology for providing documentation. You can view these manual pages locally using the man(1) command. These manual pages come from many different sources, and thus, have a variety of writing styles. For more information about the manual page format, see the manual page for manpages(5). |
TOLOWER(3) BSD 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); #include <ctype.h> #include <xlocale.h> int tolower_l(int c, locale_t loc); DESCRIPTION The tolower() function converts an upper-case letter to the corresponding lower-case letter. For single C chars locales (see multibyte(3)), the value of the argument is representable as an unsigned char or the value of EOF. Although the tolower() function uses the current locale, the tolower_l() function may be passed a locale directly. See xlocale(3) for more infor-mation. information. mation. RETURN VALUES If the argument is an upper-case letter, the tolower() function returns the corresponding lower-case letter if there is one; otherwise, the argu-ment argument ment 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() function should be used instead. SEE ALSO ctype(3), islower(3), multibyte(3), towlower(3), xlocale(3) STANDARDS The tolower() function conforms to ISO/IEC 9899:1990 (``ISO C90''). BSD August 21, 2004 BSD |