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authorKonstantin Belousov <kib@FreeBSD.org>2021-07-14 15:41:36 +0000
committerKonstantin Belousov <kib@FreeBSD.org>2021-07-15 16:40:28 +0000
commitee37f64cf875255338f917a9da76c643cf59786c (patch)
treedfd0b31992457cb856c55df13d953ffb1569d77d /lib/libc
parent8c3ea3f4c4f343e5ecf653e2a50e1fb178cd0b02 (diff)
downloadsrc-ee37f64cf875255338f917a9da76c643cf59786c.tar.gz
src-ee37f64cf875255338f917a9da76c643cf59786c.zip
libc: add mempcpy(3) and wmempcpy(3)
Reviewed by: markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D31180
Diffstat (limited to 'lib/libc')
-rw-r--r--lib/libc/string/Makefile.inc6
-rw-r--r--lib/libc/string/Symbol.map5
-rw-r--r--lib/libc/string/memcpy.319
-rw-r--r--lib/libc/string/mempcpy.c41
-rw-r--r--lib/libc/string/wmemchr.310
-rw-r--r--lib/libc/string/wmempcpy.c42
6 files changed, 114 insertions, 9 deletions
diff --git a/lib/libc/string/Makefile.inc b/lib/libc/string/Makefile.inc
index 6e6a3f42f723..6945155812af 100644
--- a/lib/libc/string/Makefile.inc
+++ b/lib/libc/string/Makefile.inc
@@ -10,7 +10,7 @@ CFLAGS+= -I${LIBC_SRCTOP}/locale
MISRCS+=bcmp.c bcopy.c bzero.c explicit_bzero.c \
ffs.c ffsl.c ffsll.c fls.c flsl.c flsll.c \
memccpy.c memchr.c memrchr.c memcmp.c \
- memcpy.c memmem.c memmove.c memset.c memset_s.c \
+ memcpy.c memmem.c memmove.c mempcpy.c memset.c memset_s.c \
stpcpy.c stpncpy.c strcasecmp.c \
strcat.c strcasestr.c strchr.c strchrnul.c strcmp.c strcoll.c strcpy.c\
strcspn.c strdup.c strerror.c strlcat.c strlcpy.c strlen.c strmode.c \
@@ -25,7 +25,7 @@ MISRCS+=bcmp.c bcopy.c bzero.c explicit_bzero.c \
wcsncpy.c wcsnlen.c wcspbrk.c \
wcsrchr.c wcsspn.c wcsstr.c wcstok.c wcswidth.c wcsxfrm.c wmemchr.c \
wmemcmp.c \
- wmemcpy.c wmemmove.c wmemset.c
+ wmemcpy.c wmemmove.c wmempcpy.c wmemset.c
SYM_MAPS+= ${LIBC_SRCTOP}/string/Symbol.map
@@ -50,6 +50,7 @@ MLINKS+=ffs.3 ffsl.3 \
ffs.3 flsll.3
MLINKS+=index.3 rindex.3
MLINKS+=memchr.3 memrchr.3
+MLINKS+=memcpy.3 mempcpy.3
MLINKS+=memset.3 memset_s.3
MLINKS+=strcasecmp.3 strncasecmp.3 \
strcasecmp.3 strcasecmp_l.3 \
@@ -101,4 +102,5 @@ MLINKS+=wmemchr.3 wcpcpy.3 \
wmemchr.3 wmemcmp.3 \
wmemchr.3 wmemcpy.3 \
wmemchr.3 wmemmove.3 \
+ wmemchr.3 wmempcpy.3 \
wmemchr.3 wmemset.3
diff --git a/lib/libc/string/Symbol.map b/lib/libc/string/Symbol.map
index 450b745c7e0a..ec45d7fd7ddb 100644
--- a/lib/libc/string/Symbol.map
+++ b/lib/libc/string/Symbol.map
@@ -114,6 +114,11 @@ FBSD_1.6 {
strerror_l;
};
+FBSD_1.7 {
+ mempcpy;
+ wmempcpy;
+};
+
FBSDprivate_1.0 {
__strtok_r;
};
diff --git a/lib/libc/string/memcpy.3 b/lib/libc/string/memcpy.3
index febc0fa34dd9..c65e4145264a 100644
--- a/lib/libc/string/memcpy.3
+++ b/lib/libc/string/memcpy.3
@@ -32,7 +32,7 @@
.\" @(#)memcpy.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd June 4, 1993
+.Dd July 14, 2021
.Dt MEMCPY 3
.Os
.Sh NAME
@@ -44,11 +44,15 @@
.In string.h
.Ft void *
.Fn memcpy "void *dst" "const void *src" "size_t len"
+.Ft void *
+.Fn mempcpy "void *dst" "const void *src" "size_t len"
.Sh DESCRIPTION
The
.Fn memcpy
-function
-copies
+and
+.Fn mempcpy
+functions
+copy
.Fa len
bytes from string
.Fa src
@@ -65,12 +69,17 @@ The
function
returns the original value of
.Fa dst .
+.Pp
+The
+.Fn mempcpy
+function returns a pointer to the byte after the last written byte.
.Sh SEE ALSO
.Xr bcopy 3 ,
.Xr memccpy 3 ,
.Xr memmove 3 ,
.Xr strcpy 3 ,
.Xr wmemcpy 3
+.Xr wmempcpy 3
.Sh STANDARDS
The
.Fn memcpy
@@ -80,7 +89,9 @@ conforms to
.Sh BUGS
In this implementation
.Fn memcpy
-is implemented using
+and
+.Fn mempcpy
+are implemented using
.Xr bcopy 3 ,
and therefore the strings may overlap.
On other systems, copying overlapping strings may produce surprises.
diff --git a/lib/libc/string/mempcpy.c b/lib/libc/string/mempcpy.c
new file mode 100644
index 000000000000..12c0d791e9d3
--- /dev/null
+++ b/lib/libc/string/mempcpy.c
@@ -0,0 +1,41 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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 AUTHOR 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 AUTHOR 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 <string.h>
+
+void *
+mempcpy(void *__restrict dst, const void *__restrict src, size_t len)
+{
+ return ((char *)memcpy(dst, src, len) + len);
+}
diff --git a/lib/libc/string/wmemchr.3 b/lib/libc/string/wmemchr.3
index 37ba05031ca9..8a926eef456a 100644
--- a/lib/libc/string/wmemchr.3
+++ b/lib/libc/string/wmemchr.3
@@ -35,7 +35,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd March 4, 2009
+.Dd July 14, 2021
.Dt WMEMCHR 3
.Os
.Sh NAME
@@ -43,6 +43,7 @@
.Nm wmemcmp ,
.Nm wmemcpy ,
.Nm wmemmove ,
+.Nm wmempcpy ,
.Nm wmemset ,
.Nm wcpcpy ,
.Nm wcpncpy ,
@@ -79,6 +80,8 @@
.Ft wchar_t *
.Fn wmemmove "wchar_t *s1" "const wchar_t *s2" "size_t n"
.Ft wchar_t *
+.Fn wmempcpy "wchar_t * restrict s1" "const wchar_t * restrict s2" "size_t n"
+.Ft wchar_t *
.Fn wmemset "wchar_t *s" "wchar_t c" "size_t n"
.Ft wchar_t *
.Fn wcpcpy "wchar_t *s1" "wchar_t *s2"
@@ -168,7 +171,8 @@ and
which conform to
.St -p1003.1-2008 ;
and
-.Fn wcslcat
-and
+.Fn wcslcat ,
.Fn wcslcpy ,
+and
+.Fn wmempcpy ,
which are extensions.
diff --git a/lib/libc/string/wmempcpy.c b/lib/libc/string/wmempcpy.c
new file mode 100644
index 000000000000..208d62a26849
--- /dev/null
+++ b/lib/libc/string/wmempcpy.c
@@ -0,0 +1,42 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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 AUTHOR 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 AUTHOR 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 <string.h>
+#include <wchar.h>
+
+wchar_t *
+wmempcpy(wchar_t *__restrict dst, const wchar_t *__restrict src, size_t len)
+{
+ return (wmemcpy(dst, src, len) + len);
+}