fsck_hfs/fsck_debug.c

   1 /*
   2  * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 #include <stdio.h>
  24 #include <stdarg.h>
  25 #include "fsck_debug.h"
  26 #include "fsck_hfs.h"
  27
  28 /* Current debug level of fsck_hfs for printing messages via DPRINTF */
  29 unsigned long cur_debug_level;
  30
  31 /* Function: DPRINTF
  32  *
  33  * Description: Debug function similar to printf except the first parameter
  34  * which indicates the type of message to be printed by DPRINTF. Based on
  35  * current debug level and the type of message, the function decides
  36  * whether to print the message or not.
  37  *
  38  * Each unique message type has a bit assigned to it.  The message type
  39  * passed to DPRINTF can be one or combination (OR-ed value) of pre-defined
  40  * debug message types.  Only the messages whose type have one or more similar
  41  * bits set in comparison with current global debug level are printed.
  42  *
  43  * For example, if cur_debug_level = 0x11 (d_info|d_xattr)
  44  * ----------------------------------------
  45  *      message type    -       printed/not printed
  46  * ----------------------------------------
  47  *      d_info                  -       printed
  48  *      d_error|d_xattr -       printed
  49  *      d_error                 -       not printed
  50  *      d_overlap               -       not printed
  51  *
  52  * Input:
  53  *      message_type - type of message, to determine when to print the message
  54  *      variable arguments - similar to printfs
  55  *
  56  * Output:
  57  *      Nothing
  58  */
  59 void DPRINTF (unsigned long type, char *fmt, ...)
  60 {
  61         if (cur_debug_level & type) {
  62                 va_list ap;
  63
  64                 plog ("\t");
  65                 va_start(ap, fmt);
  66                 vplog(fmt, ap);
  67                 va_end(ap);
  68         }
  69 }
  70
  71 void HexDump(const void *p_arg, unsigned length, int showOffsets)
  72 {
  73         const u_int8_t *p = p_arg;
  74         unsigned i;
  75         char ascii[17];
  76         u_int8_t byte;
  77
  78         ascii[16] = '\0';
  79
  80         for (i=0; i<length; ++i)
  81         {
  82                 if (showOffsets && (i & 0xF) == 0)
  83                         plog("%08X: ", i);
  84
  85                 byte = p[i];
  86                 plog("%02X ", byte);
  87                 if (byte < 32 || byte > 126)
  88                         ascii[i & 0xF] = '.';
  89                 else
  90                         ascii[i & 0xF] = byte;
  91
  92                 if ((i & 0xF) == 0xF)
  93                 {
  94                         plog("  %s\n", ascii);
  95                 }
  96         }
  97
  98         if (i & 0xF)
  99         {
 100                 unsigned j;
 101                 for (j = i & 0xF; j < 16; ++j)
 102                         plog("   ");
 103                 ascii[i & 0xF] = 0;
 104                 plog("  %s\n", ascii);
 105         }
 106 }