.\"
.\" buf_putc.3 -- simple string buffer for C
.\"
.\" Copyright (c) 2019-2023 David Demelier <markand@malikania.fr>
.\"
.\" Permission to use, copy, modify, and/or distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd October 29, 2019-2022
.Dt BUF_PUTC 3
.Os
.\" NAME
.Sh NAME
.Nm buf_putc
.Nd append a single character
.\" SYNOPSIS
.Sh SYNOPSIS
.In buf.h
.Ft int
.Fn buf_putc "struct buf *b" "char c"
.\" DESCRIPTION
.Sh DESCRIPTION
Append the
.Fa c
character into the buffer specified by
.Fa b .
.Pp
This function should be avoided for performance reasons unless you reserve more
storage using
.Fn buf_reserve
prior to calling this function. See
.Xr buf_reserve 3
for more details.
.\" RETURN VALUE
.Sh RETURN VALUE
The
.Fn buf_putc
function returns -1 in case of error and
.Va errno
is set to indicate the error.
.\" ERRORS
.Sh ERRORS
.Bl -tag -width Er
.It Bq Er ENOMEM
Couldn't allocate more memory.
.El
.\" SEE ALSO
.Sh SEE ALSO
.Xr libbuf 3 ,
.Xr buf_reserve 3
.\" AUTHORS
.Sh AUTHORS
The
.Nm libbuf
library was written by
.An David Demelier <markand@malikania.fr>