Remove libkern/bcmp.c
The kernel was migrated to memcmp in ba96f37758
("Use __builtin
for various mem* and b* (e.g. bzero) routines.") and there are no
remaining architectures using the file.
Sponsored by: Rubicon Communications, LLC ("Netgate")
This commit is contained in:
parent
451756d1ba
commit
362c5920da
@ -1,146 +0,0 @@
|
||||
/*-
|
||||
* SPDX-License-Identifier: BSD-3-Clause
|
||||
*
|
||||
* Copyright (c) 1987, 1993
|
||||
* The Regents of the University of California. 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.
|
||||
* 3. 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.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <sys/libkern.h>
|
||||
#include <machine/endian.h>
|
||||
|
||||
typedef const void *cvp;
|
||||
typedef const unsigned char *ustring;
|
||||
typedef unsigned long ul;
|
||||
typedef const unsigned long *culp;
|
||||
|
||||
/*
|
||||
* bcmp -- vax cmpc3 instruction
|
||||
*/
|
||||
int
|
||||
(bcmp)(const void *b1, const void *b2, size_t length)
|
||||
{
|
||||
#if BYTE_ORDER == LITTLE_ENDIAN
|
||||
/*
|
||||
* The following code is endian specific. Changing it from
|
||||
* little-endian to big-endian is fairly trivial, but making
|
||||
* it do both is more difficult.
|
||||
*
|
||||
* Note that this code will reference the entire longword which
|
||||
* includes the final byte to compare. I don't believe this is
|
||||
* a problem since AFAIK, objects are not protected at smaller
|
||||
* than longword boundaries.
|
||||
*/
|
||||
int shl, shr, len = length;
|
||||
ustring p1 = b1, p2 = b2;
|
||||
ul va, vb;
|
||||
|
||||
if (len == 0)
|
||||
return (0);
|
||||
|
||||
/*
|
||||
* align p1 to a longword boundary
|
||||
*/
|
||||
while ((long)p1 & (sizeof(long) - 1)) {
|
||||
if (*p1++ != *p2++)
|
||||
return (1);
|
||||
if (--len <= 0)
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
* align p2 to longword boundary and calculate the shift required to
|
||||
* align p1 and p2
|
||||
*/
|
||||
shr = (long)p2 & (sizeof(long) - 1);
|
||||
if (shr != 0) {
|
||||
p2 -= shr; /* p2 now longword aligned */
|
||||
shr <<= 3; /* offset in bits */
|
||||
shl = (sizeof(long) << 3) - shr;
|
||||
|
||||
va = *(culp)p2;
|
||||
p2 += sizeof(long);
|
||||
|
||||
while ((len -= sizeof(long)) >= 0) {
|
||||
vb = *(culp)p2;
|
||||
p2 += sizeof(long);
|
||||
if (*(culp)p1 != (va >> shr | vb << shl))
|
||||
return (1);
|
||||
p1 += sizeof(long);
|
||||
va = vb;
|
||||
}
|
||||
/*
|
||||
* At this point, len is between -sizeof(long) and -1,
|
||||
* representing 0 .. sizeof(long)-1 bytes remaining.
|
||||
*/
|
||||
if (!(len += sizeof(long)))
|
||||
return (0);
|
||||
|
||||
len <<= 3; /* remaining length in bits */
|
||||
/*
|
||||
* The following is similar to the `if' condition
|
||||
* inside the above while loop. The ?: is necessary
|
||||
* to avoid accessing the longword after the longword
|
||||
* containing the last byte to be compared.
|
||||
*/
|
||||
return ((((va >> shr | ((shl < len) ? *(culp)p2 << shl : 0)) ^
|
||||
*(culp)p1) & ((1L << len) - 1)) != 0);
|
||||
} else {
|
||||
/* p1 and p2 have common alignment so no shifting needed */
|
||||
while ((len -= sizeof(long)) >= 0) {
|
||||
if (*(culp)p1 != *(culp)p2)
|
||||
return (1);
|
||||
p1 += sizeof(long);
|
||||
p2 += sizeof(long);
|
||||
}
|
||||
|
||||
/*
|
||||
* At this point, len is between -sizeof(long) and -1,
|
||||
* representing 0 .. sizeof(long)-1 bytes remaining.
|
||||
*/
|
||||
if (!(len += sizeof(long)))
|
||||
return (0);
|
||||
|
||||
return (((*(culp)p1 ^ *(culp)p2)
|
||||
& ((1L << (len << 3)) - 1)) != 0);
|
||||
}
|
||||
#else
|
||||
const char *p1, *p2;
|
||||
|
||||
if (length == 0)
|
||||
return(0);
|
||||
p1 = b1;
|
||||
p2 = b2;
|
||||
do
|
||||
if (*p1++ != *p2++)
|
||||
break;
|
||||
while (--length);
|
||||
return(length);
|
||||
#endif
|
||||
}
|
@ -344,7 +344,6 @@ void hexdump(const void *ptr, int length, const char *hdr, int flags);
|
||||
void bcopy(const void * _Nonnull from, void * _Nonnull to, size_t len);
|
||||
void bzero(void * _Nonnull buf, size_t len);
|
||||
void explicit_bzero(void * _Nonnull, size_t);
|
||||
int bcmp(const void *b1, const void *b2, size_t len);
|
||||
|
||||
void *memset(void * _Nonnull buf, int c, size_t len);
|
||||
void *memcpy(void * _Nonnull to, const void * _Nonnull from, size_t len);
|
||||
|
Loading…
Reference in New Issue
Block a user