.TH LIBSIMPLE_STRNTOLOWER 3 2018-11-25 libsimple
.SH NAME
libsimple_strntolower, libsimple_stpntolower \- convert a string to lower case
.SH SYNOPSIS
.nf
#include <libsimple.h>

static inline char *libsimple_strntolower(char *\fIdest\fP, const char *\fIsrc\fP, size_t \fIn\fP);
char *libsimple_stpntolower(char *\fIdest\fP, const char *\fIsrc\fP, size_t \fIn\fP);

#ifndef strntolower
# define strntolower libsimple_strntolower
#endif
#ifndef stpntolower
# define stpntolower libsimple_stpntolower
#endif
.fi
.PP
Link with
.IR \-lsimple .
.SH DESCRIPTION
The
.BR libsimple_strntolower ()
and
.BR libsimple_stpntolower ()
functions copies and covert a string, including the
NUL byte that terminates it, to lower case.
The string
.I src
is copied into
.IR dest ,
with all upper case ASCII characters converted to
lower case; however no more than
.I n
bytes will be copied or coverted. The arrays may overlap,
and there is an optimisation for the case where
.IR dest==src .
.SH RETURN VALUE
The
.BR libsimple_strntolower ()
function returns the pointer
.IR dest .
.PP
The
.BR libsimple_stpntolower ()
function returns the pointer
end of the string copied into
.IR dest ,
that is
.IR &dest[strnlen(src,n)] .
.SH ERRORS
The
.BR libsimple_strntolower ()
and
.BR libsimple_stpntolower ()
functions cannot fail.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lb lb lb
l l l.
Interface	Attribute	Value
T{
.BR libsimple_strntolower (),
.br
.BR libsimple_stpntolower ()
T}	Thread safety	MT-Safe
T{
.BR libsimple_strntolower (),
.br
.BR libsimple_stpntolower ()
T}	Async-signal safety	AS-Safe
T{
.BR libsimple_strntolower (),
.br
.BR libsimple_stpntolower ()
T}	Async-cancel safety	AC-Safe
.TE
.SH EXAMPLES
None.
.SH APPLICATION USAGE
None.
.SH RATIONALE
None.
.SH FUTURE DIRECTIONS
None.
.SH NOTES
None.
.SH BUGS
None.
.SH SEE ALSO
.BR libsimple_strntoupper (3),
.BR libsimple_strnreplace (3),
.BR libsimple_strnntolower (3),
.BR libsimple_memntolower (3)