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Man page of _TOLOWER
_TOLOWER
Section: POSIX Programmer's Manual (3P)
Updated: 2013
Index
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PROLOG
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
NAME
_tolower
--- transliterate uppercase characters to lowercase
SYNOPSIS
#include <ctype.h>
int _tolower(int c);
DESCRIPTION
The
_tolower()
macro shall be equivalent to tolower(c) except that the
application shall ensure that the argument
c
is an uppercase letter.
RETURN VALUE
Upon successful completion,
_tolower()
shall return the lowercase letter corresponding to the argument
passed.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
Applications should use the
tolower()
function instead of the obsolescent
_tolower()
function.
RATIONALE
None.
FUTURE DIRECTIONS
The
_tolower()
function may be removed in a future version.
SEE ALSO
tolower(),
isupper()
The Base Definitions volume of POSIX.1-2008,
Chapter 7, Locale,
<ctype.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
http://www.unix.org/online.html .
Any typographical or formatting errors that appear
in this page are most likely
to have been introduced during the conversion of the source files to
man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
Index
- PROLOG
-
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- EXAMPLES
-
- APPLICATION USAGE
-
- RATIONALE
-
- FUTURE DIRECTIONS
-
- SEE ALSO
-
- COPYRIGHT
-
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