1_TOLOWER(3P)               POSIX Programmer's Manual              _TOLOWER(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

12       _tolower - transliterate uppercase characters to lowercase
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SYNOPSIS

15       #include <ctype.h>
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17       int _tolower(int c);
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DESCRIPTION

21       The _tolower() macro shall be equivalent to tolower(c) except that  the
22       application shall ensure that the argument c is an uppercase letter.
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RETURN VALUE

25       Upon  successful completion, _tolower() shall return the lowercase let‐
26       ter corresponding to the argument passed.
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ERRORS

29       No errors are defined.
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31       The following sections are informative.
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EXAMPLES

34       None.
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APPLICATION USAGE

37       None.
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RATIONALE

40       None.
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FUTURE DIRECTIONS

43       None.
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SEE ALSO

46       tolower(),    isupper(),    the    Base    Definitions    volume     of
47       IEEE Std 1003.1-2001, Chapter 7, Locale, <ctype.h>
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50       Portions  of  this text are reprinted and reproduced in electronic form
51       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
52       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
53       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
54       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
55       event of any discrepancy between this version and the original IEEE and
56       The  Open Group Standard, the original IEEE and The Open Group Standard
57       is the referee document. The original Standard can be  obtained  online
58       at http://www.opengroup.org/unix/online.html .
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62IEEE/The Open Group                  2003                         _TOLOWER(3P)
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