Copyright (c) 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
This code is derived from software contributed to Berkeley by
the American National Standards Committee X3, on Information
Processing Systems.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)tolower.3 8.1 (Berkeley) 6/4/93
$FreeBSD$
.Dd July 25, 2010 .Dt TOLOWER 3 .Os .Sh NAME .Nm tolower .Nd upper case to lower case letter conversion .Sh LIBRARY .Lb libc .Sh SYNOPSIS n ctype.h .Ft int .Fn tolower "int c" .Sh DESCRIPTION The .Fn tolower function converts an upper-case letter to the corresponding lower-case letter. The argument must be representable as an .Vt "unsigned char" or the value of .Dv EOF . .Sh RETURN VALUES If the argument is an upper-case letter, the .Fn tolower function returns the corresponding lower-case letter if there is one; otherwise, the argument is returned unchanged. .Sh COMPATIBILITY The x 4.4 extension of accepting arguments outside of the range of the .Vt "unsigned char" type in locales with large character sets is considered obsolete and may not be supported in future releases. The .Fn towlower function should be used instead. .Sh SEE ALSO .Xr ctype 3 , .Xr islower 3 , .Xr towlower 3 .Sh STANDARDS The .Fn tolower function conforms to .St -isoC .
The Regents of the University of California. All rights reserved.
This code is derived from software contributed to Berkeley by
the American National Standards Committee X3, on Information
Processing Systems.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)tolower.3 8.1 (Berkeley) 6/4/93
$FreeBSD$
.Dd July 25, 2010 .Dt TOLOWER 3 .Os .Sh NAME .Nm tolower .Nd upper case to lower case letter conversion .Sh LIBRARY .Lb libc .Sh SYNOPSIS n ctype.h .Ft int .Fn tolower "int c" .Sh DESCRIPTION The .Fn tolower function converts an upper-case letter to the corresponding lower-case letter. The argument must be representable as an .Vt "unsigned char" or the value of .Dv EOF . .Sh RETURN VALUES If the argument is an upper-case letter, the .Fn tolower function returns the corresponding lower-case letter if there is one; otherwise, the argument is returned unchanged. .Sh COMPATIBILITY The x 4.4 extension of accepting arguments outside of the range of the .Vt "unsigned char" type in locales with large character sets is considered obsolete and may not be supported in future releases. The .Fn towlower function should be used instead. .Sh SEE ALSO .Xr ctype 3 , .Xr islower 3 , .Xr towlower 3 .Sh STANDARDS The .Fn tolower function conforms to .St -isoC .