annotate buf_shrink.3 @ 22:d87e84936795

misc: update copyright years
author David Demelier <markand@malikania.fr>
date Wed, 24 Feb 2021 11:43:50 +0100
parents 939fe74cd80a
children dbdc17e11648
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
1 .\"
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
2 .\" buf_shrink.3 -- simple string buffer for C
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
3 .\"
22
d87e84936795 misc: update copyright years
David Demelier <markand@malikania.fr>
parents: 21
diff changeset
4 .\" Copyright (c) 2019-2021 David Demelier <markand@malikania.fr>
0
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
5 .\"
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
6 .\" Permission to use, copy, modify, and/or distribute this software for any
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
7 .\" purpose with or without fee is hereby granted, provided that the above
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
8 .\" copyright notice and this permission notice appear in all copies.
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
9 .\"
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
10 .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
11 .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
12 .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
13 .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
14 .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
15 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
16 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
17 .\"
22
d87e84936795 misc: update copyright years
David Demelier <markand@malikania.fr>
parents: 21
diff changeset
18 .Dd October 29, 2019-2021
0
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
19 .Dt BUF_SHRINK 3
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
20 .Os
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
21 .\" NAME
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
22 .Sh NAME
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
23 .Nm buf_shrink
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
24 .Nd reduce the buffer to its minimal requirement
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
25 .\" SYNOPSIS
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
26 .Sh SYNOPSIS
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
27 .In buf.h
21
939fe74cd80a buf: switch to int from bool
David Demelier <markand@malikania.fr>
parents: 0
diff changeset
28 .Ft int
0
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
29 .Fn buf_shrink "struct buf *b"
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
30 .\" DESCRIPTION
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
31 .Sh DESCRIPTION
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
32 Reduce the buffer capacity specified by
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
33 .Fa b
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
34 to reduce memory usage.
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
35 .Pp
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
36 The
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
37 .Fn buf_shrink
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
38 function will reduce the buffer capacity to the exact buffer length.
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
39 If reallocation of the new memory region failed, the current buffer is kept and
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
40 its capacity is unchanged.
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
41 As such, it is perfectly safe to ignore the return value unless you really want
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
42 to reduce memory consumption
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
43 .\" RETURN VALUE
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
44 .Sh RETURN VALUE
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
45 If the buffer's length is 0, the function simply frees the underlying data and
21
939fe74cd80a buf: switch to int from bool
David Demelier <markand@malikania.fr>
parents: 0
diff changeset
46 return 0.
0
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
47 .Pp
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
48 Otherwise the
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
49 .Fn buf_shrink
21
939fe74cd80a buf: switch to int from bool
David Demelier <markand@malikania.fr>
parents: 0
diff changeset
50 function returns -1 in case of error and
0
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
51 .Va errno
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
52 is set to indicate the error.
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
53 .\" ERRORS
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
54 .Sh ERRORS
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
55 .Bl -tag -width Er
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
56 .It Bq Er ENOMEM
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
57 Memory reallocation failed.
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
58 .El
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
59 .\" SEE ALSO
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
60 .Sh SEE ALSO
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
61 .Xr libbuf 3
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
62 .\" AUTHORS
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
63 .Sh AUTHORS
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
64 The
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
65 .Nm libbuf
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
66 library was written by
b1991ee4451d misc: initial import
David Demelier <markand@malikania.fr>
parents:
diff changeset
67 .An David Demelier <markand@malikania.fr>