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author | William Wilgus <wilgus.william@gmail.com> | 2022-11-14 11:32:34 -0500 |
---|---|---|
committer | William Wilgus <me.theuser@yahoo.com> | 2022-11-14 23:56:16 -0500 |
commit | f6c719d7ec71cc7771c46d3daa390924a3871ba3 (patch) | |
tree | e6209f23565db01809f75067247e667963092ff6 /firmware/common/strlcpy.c | |
parent | b25a9d8f99b75570d18ea64602de7fe48da612d6 (diff) | |
download | rockbox-f6c719d7ec71cc7771c46d3daa390924a3871ba3.tar.gz rockbox-f6c719d7ec71cc7771c46d3daa390924a3871ba3.zip |
replace strlcpy with strmemccpy
replace applicable calls to strlcpy with calls to strmemccpy
which null terminates on truncation
in theory the strmemccpy calls should be slightly faster since they
don't traverse the rest of the source string on truncation
but I seriously doubt there is too much of that going on in the code base
Change-Id: Ia0251514e36a6242bbf3f03c5e0df123aba60ed2
Diffstat (limited to 'firmware/common/strlcpy.c')
-rw-r--r-- | firmware/common/strlcpy.c | 64 |
1 files changed, 26 insertions, 38 deletions
diff --git a/firmware/common/strlcpy.c b/firmware/common/strlcpy.c index e320649140..bfdb6482a4 100644 --- a/firmware/common/strlcpy.c +++ b/firmware/common/strlcpy.c | |||
@@ -1,51 +1,39 @@ | |||
1 | /* $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $ */ | 1 | /*************************************************************************** |
2 | 2 | * __________ __ ___. | |
3 | /* | 3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
4 | * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> | 4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
5 | * | 9 | * |
6 | * Permission to use, copy, modify, and distribute this software for any | 10 | * Copyright (C) 2022 William Wilgus |
7 | * purpose with or without fee is hereby granted, provided that the above | ||
8 | * copyright notice and this permission notice appear in all copies. | ||
9 | * | 11 | * |
10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | 12 | * This program is free software; you can redistribute it and/or |
11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | 13 | * modify it under the terms of the GNU General Public License |
12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | 14 | * as published by the Free Software Foundation; either version 2 |
13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | 15 | * of the License, or (at your option) any later version. |
14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | 16 | * |
15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | 17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | 18 | * KIND, either express or implied. |
17 | */ | 19 | * |
20 | ****************************************************************************/ | ||
18 | 21 | ||
19 | #include <string.h> | 22 | #include <string.h> |
23 | #include "strmemccpy.h" | ||
20 | 24 | ||
21 | /* | 25 | /* |
22 | * Copy src to string dst of size siz. At most siz-1 characters | 26 | * Copy src to string dst of size siz. At most siz-1 characters |
23 | * will be copied. Always NUL terminates (unless siz == 0). | 27 | * will be copied. Always NUL terminates (unless siz == 0). |
24 | * Returns strlen(src); if retval >= siz, truncation occurred. | 28 | * Returns strlen(src); if retval >= siz, truncation occurred. |
25 | */ | 29 | */ |
26 | size_t | 30 | size_t strlcpy(char *dst, const char *src, size_t siz) |
27 | strlcpy(char *dst, const char *src, size_t siz) | ||
28 | { | 31 | { |
29 | char *d = dst; | 32 | /* Copy as many bytes as will fit */ |
30 | const char *s = src; | 33 | char *d = strmemccpy(dst, src, siz); |
31 | size_t n = siz; | 34 | if (d) |
32 | 35 | return (d - dst - 1); /* count does not include NUL */ | |
33 | /* Copy as many bytes as will fit */ | ||
34 | if (n != 0) { | ||
35 | while (--n != 0) { | ||
36 | if ((*d++ = *s++) == '\0') | ||
37 | break; | ||
38 | } | ||
39 | } | ||
40 | 36 | ||
41 | /* Not enough room in dst, add NUL and traverse rest of src */ | 37 | /* Not enough room in dst, add NUL and traverse rest of src */ |
42 | if (n == 0) { | 38 | return(siz + strlen(src+siz)); /* count does not include NUL */ |
43 | if (siz != 0) | ||
44 | *d = '\0'; /* NUL-terminate dst */ | ||
45 | while (*s++) | ||
46 | ; | ||
47 | } | ||
48 | |||
49 | return(s - src - 1); /* count does not include NUL */ | ||
50 | } | 39 | } |
51 | |||