.TH LIBSIMPLE_TIMESPECTOSTR 3 libsimple
.SH NAME
libsimple_timespectostr, libsimple_timevaltostr \- convert a duration data structure to a string

.SH SYNOPSIS
.nf
#include <libsimple.h>

char *libsimple_timespectostr(char *restrict \fIbuf\fP, const struct timespec *restrict \fIts\fP);
char *libsimple_timevaltostr(char *restrict \fIbuf\fP, const struct timeval *restrict \fItv\fP);

#ifndef timespectostr
# define timespectostr libsimple_timespectostr
#endif
#ifndef timevaltostr
# define timevaltostr libsimple_timevaltostr
#endif
.fi
.PP
Link with
.IR \-lsimple .

.SH DESCRIPTION
The
.BR libsimple_timespectostr ()
and
.BR libsimple_timevaltostr ()
functions convert
.I ts
and
.IR tv ,
respectively, to a textual represention contain only a
real value of the number of seconds the input represents.
.PP
If
.I buf
is
.BR NULL ,
a new pointer is allocated, otherwise
.I buf
is used as storage buffer for the string and is returned.
Unless
.I buf
is
.BR NULL ,
it should be at least
.I INTSTRLEN(time_t)+12
bytes for the
.BR libsimple_timespectostr ()
function, and less 3 bytes
for the
.BR libsimple_timevaltostr ()
function.
.PP
The returned string will always start with either a
.B +
or a
.BR \- ,
and will always contain 9 (for the
.BR libsimple_timespectostr ()
function) or 6 (for the
.BR libsimple_timevaltostr ()
function) decimals.

.SH RETURN VALUE
The
.BR libsimple_timespectostr ()
and
.BR libsimple_timevaltostr ()
functions return the duration as a textual
representation of the it as a real value of
seconds, without any unit included in the text,
upon successful completion. If
.I buf
is
.BR NULL ,
the returned pointer is a deallocatable, unique,
pointer, otherwise the pointer
.I buf
is returned. On failure,
.B NULL
is returned.

.SH ERRORS
The
.BR libsimple_timespectostr ()
and
.BR libsimple_timevaltostr ()
functions fail if:
.TP
.B ENOMEM
.I buf
is
.B NULL
and the call to
.BR malloc (3)
failed because it could not allocate enough memory.
.TP
.B EINVAL
.I ts->tv_nsec
is negative or greater than 999\ 999\ 999, or
.I tv->tv_usec
is negative or greater than 999\ 999.

.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_timespectostr ()
.br
.BR libsimple_timevaltostr ()
T}	Thread safety	MT-Safe
T{
.BR libsimple_timespectostr ()
.br
.BR libsimple_timevaltostr ()
T}	Async-signal safety	AS-Safe
T{
.BR libsimple_timespectostr ()
.br
.BR libsimple_timevaltostr ()
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 HISTORY
libsimple 1.0

.SH BUGS
None.

.SH SEE ALSO
.BR libsimple_minimise_number_string (3),
.BR libsimple_sumtimespec (3),
.BR libsimple_difftimespec (3),
.BR libsimple_multimespec (3),
.BR libsimple_cmptimespec (3),
.BR libsimple_strtotimespec (3),
.BR libsimple_timespectodouble (3),
.BR libsimple_doubletotimespec (3),
.BR libsimple_timeval2timespec (3)