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