1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (C) 2013 Intel Corporation 5 * Copyright (C) 1997 Justin T. Gibbs 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <dev/nvme/nvme.h> 35 36 void 37 nvme_strvis(uint8_t *dst, const uint8_t *src, int dstlen, int srclen) 38 { 39 uint8_t *cur_pos; 40 41 /* Trim leading/trailing spaces, nulls. */ 42 while (srclen > 0 && src[0] == ' ') 43 src++, srclen--; 44 while (srclen > 0 45 && (src[srclen - 1] == ' ' || src[srclen - 1] == '\0')) 46 srclen--; 47 48 while (srclen > 0 && dstlen > 1) { 49 cur_pos = dst; 50 51 /* Show '?' for non-printable characters. */ 52 if (*src < 0x20 || *src >= 0x7F) 53 *cur_pos++ = '?'; 54 else 55 *cur_pos++ = *src; 56 src++; 57 srclen--; 58 dstlen -= cur_pos - dst; 59 dst = cur_pos; 60 } 61 *dst = '\0'; 62 } 63