From: William F. Jolitz Date: Sat, 29 Jun 1991 21:35:13 +0000 (-0800) Subject: 386BSD 0.1 development X-Git-Tag: 386BSD-0.1~1229 X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/commitdiff_plain/44ab483c9f88e781f7b2da84f5461afd1b3931ea?ds=inline;hp=b012ae1b79fa156bdf83b9113b66293b20b19ca8 386BSD 0.1 development Work on file usr/src/lib/libc/string/memchr.3 Work on file usr/src/lib/libc/string/memcmp.3 Work on file usr/src/lib/libc/string/memcpy.3 Co-Authored-By: Lynne Greer Jolitz Synthesized-from: 386BSD-0.1 --- diff --git a/usr/src/lib/libc/string/memchr.3 b/usr/src/lib/libc/string/memchr.3 new file mode 100644 index 0000000000..c09de05d20 --- /dev/null +++ b/usr/src/lib/libc/string/memchr.3 @@ -0,0 +1,81 @@ +.\" Copyright (c) 1990, 1991 The Regents of the University of California. +.\" All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" Chris Torek and the American National Standards Committee X3, +.\" on Information Processing Systems. +.\" +.\" 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. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" 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. +.\" +.\" @(#)memchr.3 5.4 (Berkeley) 6/29/91 +.\" +.Dd June 29, 1991 +.Dt MEMCHR 3 +.Os +.Sh NAME +.Nm memchr +.Nd locate byte in byte string +.Sh SYNOPSIS +.Fd #include +.Ft void * +.Fn memchr "const void *b" "int c" "size_t len" +.Sh DESCRIPTION +The +.Fn memchr +function +locates the first occurrence of +.Fa c +(converted to an unsigned char) +in string +.Fa b . +.Sh RETURN VALUES +The +.Fn memchr +function +returns a pointer to the byte located, +or NULL if no such byte exists within +.Fa len +bytes. +.Sh SEE ALSO +.Xr index 3 , +.Xr rindex 3 , +.Xr strchr 3 , +.Xr strcspn 3 , +.Xr strpbrk 3 , +.Xr strrchr 3 , +.Xr strsep 3 , +.Xr strspn 3 , +.Xr strstr 3 , +.Xr strtok 3 +.Sh STANDARDS +The +.Fn memchr +function +conforms to +.St -ansiC . diff --git a/usr/src/lib/libc/string/memcmp.3 b/usr/src/lib/libc/string/memcmp.3 new file mode 100644 index 0000000000..3426e5ec30 --- /dev/null +++ b/usr/src/lib/libc/string/memcmp.3 @@ -0,0 +1,82 @@ +.\" Copyright (c) 1990, 1991 The Regents of the University of California. +.\" All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" Chris Torek and the American National Standards Committee X3, +.\" on Information Processing Systems. +.\" +.\" 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. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" 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. +.\" +.\" @(#)memcmp.3 5.5 (Berkeley) 6/29/91 +.\" +.Dd June 29, 1991 +.Dt MEMCMP 3 +.Os +.Sh NAME +.Nm memcmp +.Nd compare byte string +.Sh SYNOPSIS +.Fd #include +.Ft int +.Fn memcmp "const void *b1" "const void *b2" "size_t len" +.Sh DESCRIPTION +The +.Fn memcmp +function +compares byte string +.Fa b1 +against byte string +.Fa b2 . +Both strings are assumed to be +.Fa len +bytes long. +.Sh RETURN VALUES +The +.Fn memcmp +function +returns zero if the the two strings are identical, +otherwise returns the difference between the first two differing bytes +(treated as unsigned char values, so that +.Sq Li \e200 +is greater than +.Sq Li \&\e0 , +for example). +Zero-length strings are always identical. +.Sh SEE ALSO +.Xr bcmp 3 , +.Xr strcasecmp 3 , +.Xr strcmp 3 , +.Xr strcoll 3 , +.Xr strxfrm 3 +.Sh STANDARDS +The +.Fn memcmp +function +conforms to +.St -ansiC . diff --git a/usr/src/lib/libc/string/memcpy.3 b/usr/src/lib/libc/string/memcpy.3 new file mode 100644 index 0000000000..6b28b661a1 --- /dev/null +++ b/usr/src/lib/libc/string/memcpy.3 @@ -0,0 +1,83 @@ +.\" Copyright (c) 1990, 1991 The Regents of the University of California. +.\" All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" Chris Torek and the American National Standards Committee X3, +.\" on Information Processing Systems. +.\" +.\" 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. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" 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. +.\" +.\" @(#)memcpy.3 5.5 (Berkeley) 6/29/91 +.\" +.Dd June 29, 1991 +.Dt MEMCPY 3 +.Os +.Sh NAME +.Nm memcpy +.Nd copy byte string +.Sh SYNOPSIS +.Fd #include +.Ft void * +.Fn memcpy "void *dst" "const void *src" "size_t len" +.Sh DESCRIPTION +The +.Fn memcpy +function +copies +.Fa len +bytes from string +.Fa src +to string +.Fa dst . +.Sh RETURN VALUES +The +.Fn memcpy +function +returns the original value of +.Fa dst . +.Sh SEE ALSO +.Xr bcopy 3 , +.Xr memccpy 3 , +.Xr memmove 3 , +.Xr strcpy 3 +.Sh STANDARDS +The +.Fn memcpy +function +conforms to +.St -ansiC . +.Sh BUGS +In this implementation +.Fn memcpy +is implemented using +.Xr bcopy 3 , +and therefore the strings may overlap. +On other systems, copying overlapping strings may produce surprises. +A simpler solution is to not use +.Fn memcpy .