Mercurial > hg > octave-shane > gnulib-hg
annotate lib/xmemdup0.c @ 17587:344018b6e5d7
maint: update copyright
I ran 'make update-copyright'.
Signed-off-by: Eric Blake <eblake@redhat.com>
| author | Eric Blake <eblake@redhat.com> |
|---|---|
| date | Wed, 01 Jan 2014 00:04:40 -0700 |
| parents | e542fd46ad6f |
| children |
| rev | line source |
|---|---|
| 10068 | 1 /* xmemdup0.c -- copy a block of arbitrary bytes, plus a trailing NUL |
| 2 | |
| 17587 | 3 Copyright (C) 2008-2014 Free Software Foundation, Inc. |
| 10068 | 4 |
| 5 This program is free software: you can redistribute it and/or modify | |
| 6 it under the terms of the GNU General Public License as published by | |
| 7 the Free Software Foundation; either version 3 of the License, or | |
| 8 (at your option) any later version. | |
| 9 | |
| 10 This program is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 GNU General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU General Public License | |
| 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 17 | |
| 18 #include <config.h> | |
| 19 | |
| 20 #include "xmemdup0.h" | |
| 21 #include "xalloc.h" | |
| 22 | |
| 23 #include <string.h> | |
| 24 | |
| 25 /* Clone an arbitrary block of bytes P of size S, with error checking, | |
|
16235
18a38c9615f0
In commentary, do not use ` to quote.
Paul Eggert <eggert@cs.ucla.edu>
parents:
16201
diff
changeset
|
26 and include a terminating NUL byte. P is of type 'void const *', |
| 10068 | 27 to make it easier to use this with other mem* functions that return |
|
16235
18a38c9615f0
In commentary, do not use ` to quote.
Paul Eggert <eggert@cs.ucla.edu>
parents:
16201
diff
changeset
|
28 'void *', but since appending a NUL byte only makes sense on bytes, |
|
18a38c9615f0
In commentary, do not use ` to quote.
Paul Eggert <eggert@cs.ucla.edu>
parents:
16201
diff
changeset
|
29 the return type is 'char *'. |
| 10068 | 30 |
| 31 The terminating NUL makes it safe to use strlen or rawmemchr to | |
| 32 check for embedded NUL; it also speeds up algorithms such as escape | |
| 33 sequence processing on arbitrary memory, by making it always safe | |
| 34 to read the byte after the escape character rather than having to | |
| 35 check if each escape character is the last byte in the object. */ | |
| 36 | |
| 37 char * | |
| 38 xmemdup0 (void const *p, size_t s) | |
| 39 { | |
| 40 char *result = xcharalloc (s + 1); | |
| 41 memcpy (result, p, s); | |
| 42 result[s] = 0; | |
| 43 return result; | |
| 44 } |