mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 13:50:06 +00:00
e7c5513dcd
1998-09-21 10:00 Ulrich Drepper <drepper@cygnus.com> * string/bits/string2.h: Add mempcpy optimization. * sysdeps/generic/mempcpy.c: Undefined __mempcpy. * intl/localealias.c: Define mempcpy only if not already defined. * sysdeps/i386/i486/bits/string.h: Define ffsl only if not already defined. 1998-09-20 10:48 -0400 Zack Weinberg <zack@rabi.phys.columbia.edu> * csu/abi-note.S: Emit the note directly instead of defining a preprocessor macro that's only used once. Don't include sysdep.h. * abi-tags: Generalize Solaris entry. 1998-09-18 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/bsd/getpt.c (__libc_ptyname1, __libc_ptyname2): Change to array to avoid runtime relocation. * sysdeps/unix/sysv/linux/ptsname.c: Update declarations. 1998-09-21 12:22 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * malloc/Makefile ($(objpfx)libmcheck.a): Fix use of $(LN_S). * math/Makefile ($(objpfx)libieee.a): Likewise. 1998-09-21 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/getpt.c: Fix order of argument to weak_alias. Patch by John Tobey <jtobey@banta-im.com>.
68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
/* Copy memory to memory until the specified number of bytes
|
|
has been copied, return pointer to following byte.
|
|
Overlap is NOT handled correctly.
|
|
Copyright (C) 1991, 1997, 1998 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Torbjorn Granlund (tege@sics.se).
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <string.h>
|
|
#include <memcopy.h>
|
|
#include <pagecopy.h>
|
|
|
|
#undef mempcpy
|
|
#undef __mempcpy
|
|
|
|
void *
|
|
__mempcpy (dstpp, srcpp, len)
|
|
void *dstpp;
|
|
const void *srcpp;
|
|
size_t len;
|
|
{
|
|
unsigned long int dstp = (long int) dstpp;
|
|
unsigned long int srcp = (long int) srcpp;
|
|
|
|
/* Copy from the beginning to the end. */
|
|
|
|
/* If there not too few bytes to copy, use word copy. */
|
|
if (len >= OP_T_THRES)
|
|
{
|
|
/* Copy just a few bytes to make DSTP aligned. */
|
|
len -= (-dstp) % OPSIZ;
|
|
BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);
|
|
|
|
/* Copy whole pages from SRCP to DSTP by virtual address manipulation,
|
|
as much as possible. */
|
|
|
|
PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);
|
|
|
|
/* Copy from SRCP to DSTP taking advantage of the known alignment of
|
|
DSTP. Number of bytes remaining is put in the third argument,
|
|
i.e. in LEN. This number may vary from machine to machine. */
|
|
|
|
WORD_COPY_FWD (dstp, srcp, len, len);
|
|
|
|
/* Fall out and copy the tail. */
|
|
}
|
|
|
|
/* There are just a few bytes to copy. Use byte memory operations. */
|
|
BYTE_COPY_FWD (dstp, srcp, len);
|
|
|
|
return (void *) dstp;
|
|
}
|
|
weak_alias (__mempcpy, mempcpy)
|