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| author | kib <kib@FreeBSD.org> | 2017-04-23 20:32:46 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2017-04-23 20:32:46 +0000 |
| commit | bc743032ad67f907e01ab07b89fa2c5417004333 (patch) | |
| tree | 0d47e469cd483a5664a7e6aa1e11d412c4523637 /lib/libc/string/memset_s.c | |
| parent | 240392415ab16d458302b3fdfead83d6cfa884e1 (diff) | |
| download | FreeBSD-src-bc743032ad67f907e01ab07b89fa2c5417004333.zip FreeBSD-src-bc743032ad67f907e01ab07b89fa2c5417004333.tar.gz | |
MFC r316213:
Implement the memset_s(3) function as specified by the C11 ISO/IEC
9899:2011 Appendix K 3.7.4.1.
MFC r316258:
Only activate __EXT1_VISIBLE block when using sys/errno.h in userspace.
Diffstat (limited to 'lib/libc/string/memset_s.c')
| -rw-r--r-- | lib/libc/string/memset_s.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/lib/libc/string/memset_s.c b/lib/libc/string/memset_s.c new file mode 100644 index 0000000..9bb8e1c --- /dev/null +++ b/lib/libc/string/memset_s.c @@ -0,0 +1,63 @@ +/*- + * Copyright (c) 2017 Juniper Networks. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <errno.h> +#include <stddef.h> +#include <stdint.h> +#include <string.h> +#include "libc_private.h" + +/* ISO/IEC 9899:2011 K.3.7.4.1 */ +errno_t +memset_s(void *s, rsize_t smax, int c, rsize_t n) +{ + errno_t ret; + rsize_t lim; + unsigned char v; + volatile unsigned char *dst; + + ret = EINVAL; + lim = smax; + v = (unsigned char)c; + dst = (unsigned char *)s; + if (s == NULL) { + __throw_constraint_handler_s("memset_s : s is NULL", ret); + } else if (smax > RSIZE_MAX) { + __throw_constraint_handler_s("memset_s : smax > RSIZE_MAX", + ret); + } else if (n > RSIZE_MAX) { + __throw_constraint_handler_s("memset_s : n > RSIZE_MAX", ret); + } else { + if (n < smax) + lim = n; + while (lim > 0) + dst[--lim] = v; + ret = 0; + } + return (ret); +} |
