/* Copyright (C) 1991, 1997, 1999 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 Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; 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> #undef __bzero /* Set N bytes of S to 0. */ void __bzero (s, len) void *s; size_t len; { long int dstp = (long int) s; const op_t zero = 0; if (len >= 8) { size_t xlen; /* There are at least some bytes to zero. No need to test for LEN == 0 in this alignment loop. */ while (dstp % OPSIZ != 0) { ((byte *) dstp)[0] = 0; dstp += 1; len -= 1; } /* Write 8 op_t per iteration until less than 8 op_t remain. */ xlen = len / (OPSIZ * 8); while (xlen != 0) { ((op_t *) dstp)[0] = zero; ((op_t *) dstp)[1] = zero; ((op_t *) dstp)[2] = zero; ((op_t *) dstp)[3] = zero; ((op_t *) dstp)[4] = zero; ((op_t *) dstp)[5] = zero; ((op_t *) dstp)[6] = zero; ((op_t *) dstp)[7] = zero; dstp += 8 * OPSIZ; xlen -= 1; } len %= OPSIZ * 8; /* Write 1 op_t per iteration until less than op_t remain. */ xlen = len / OPSIZ; while (xlen != 0) { ((op_t *) dstp)[0] = zero; dstp += OPSIZ; xlen -= 1; } len %= OPSIZ; } /* Write the last few bytes. */ while (len != 0) { ((byte *) dstp)[0] = 0; dstp += 1; len -= 1; } } weak_alias (__bzero, bzero)