The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/cam/cam.c

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    1 /*
    2  * Generic utility routines for the Common Access Method layer.
    3  *
    4  * Copyright (c) 1997 Justin T. Gibbs.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions, and the following disclaimer,
   12  *    without modification, immediately at the beginning of the file.
   13  * 2. The name of the author may not be used to endorse or promote products
   14  *    derived from this software without specific prior written permission.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD: stable/3/sys/cam/cam.c 50583 1999-08-29 16:33:42Z peter $
   29  */
   30 #include <sys/param.h>
   31 
   32 #include <cam/cam.h>
   33 
   34 void
   35 cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen)
   36 {
   37 
   38         /* Trim leading/trailing spaces, nulls. */
   39         while (srclen > 0 && src[0] == ' ')
   40                 src++, srclen--;
   41         while (srclen > 0
   42             && (src[srclen-1] == ' ' || src[srclen-1] == '\0'))
   43                 srclen--;
   44 
   45         while (srclen > 0 && dstlen > 1) {
   46                 u_int8_t *cur_pos = dst;
   47 
   48                 if (*src < 0x20 || *src >= 0x80) {
   49                         /* SCSI-II Specifies that these should never occur. */
   50                         /* non-printable character */
   51                         if (dstlen > 4) {
   52                                 *cur_pos++ = '\\';
   53                                 *cur_pos++ = ((*src & 0300) >> 6) + '';
   54                                 *cur_pos++ = ((*src & 0070) >> 3) + '';
   55                                 *cur_pos++ = ((*src & 0007) >> 0) + '';
   56                         } else {
   57                                 *cur_pos++ = '?';
   58                         }
   59                 } else {
   60                         /* normal character */
   61                         *cur_pos++ = *src;
   62                 }
   63                 src++;
   64                 srclen--;
   65                 dstlen -= cur_pos - dst;
   66                 dst = cur_pos;
   67         }
   68         *dst = '\0';
   69 }
   70 
   71 /*
   72  * Compare string with pattern, returning 0 on match.
   73  * Short pattern matches trailing blanks in name,
   74  * wildcard '*' in pattern matches rest of name,
   75  * wildcard '?' matches a single non-space character.
   76  */
   77 int
   78 cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len)
   79 {
   80 
   81         while (*pattern != '\0'&& str_len > 0) {  
   82 
   83                 if (*pattern == '*') {
   84                         return (0);
   85                 }
   86                 if ((*pattern != *str)
   87                  && (*pattern != '?' || *str == ' ')) {
   88                         return (1);
   89                 }
   90                 pattern++;
   91                 str++;
   92                 str_len--;
   93         }
   94         while (str_len > 0 && *str++ == ' ')
   95                 str_len--;
   96 
   97         return (str_len);
   98 }
   99 
  100 caddr_t
  101 cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
  102                int entry_size, cam_quirkmatch_t *comp_func)
  103 {
  104         for (; num_entries > 0; num_entries--, quirk_table += entry_size) {
  105                 if ((*comp_func)(target, quirk_table) == 0)
  106                         return (quirk_table);
  107         }
  108         return (NULL);
  109 }

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