1 /* Copyright (C) 1991, 1997, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 void *memset (void *dstpp, int c, size_t len)
24 long int dstp = (long int) dstpp;
31 cccc = (unsigned char) c;
35 /* Do the shift in two steps to avoid warning if long has 32 bits. */
36 cccc |= (cccc << 16) << 16;
38 /* There are at least some bytes to set.
39 No need to test for LEN == 0 in this alignment loop. */
40 while (dstp % OPSIZ != 0)
42 ((byte *) dstp)[0] = c;
47 /* Write 8 `op_t' per iteration until less than 8 `op_t' remain. */
48 xlen = len / (OPSIZ * 8);
51 ((op_t *) dstp)[0] = cccc;
52 ((op_t *) dstp)[1] = cccc;
53 ((op_t *) dstp)[2] = cccc;
54 ((op_t *) dstp)[3] = cccc;
55 ((op_t *) dstp)[4] = cccc;
56 ((op_t *) dstp)[5] = cccc;
57 ((op_t *) dstp)[6] = cccc;
58 ((op_t *) dstp)[7] = cccc;
64 /* Write 1 `op_t' per iteration until less than OPSIZ bytes remain. */
68 ((op_t *) dstp)[0] = cccc;
75 /* Write the last few bytes. */
78 ((byte *) dstp)[0] = c;
85 libc_hidden_proto(memset)
86 libc_hidden_def(memset)