hexdump.h

   1 /* Minimal - the simplest thing that could possibly work
   2  * Copyright (C) 2007  Jay Freeman (saurik)
   3 */
   4
   5 /*
   6  *        Redistribution and use in source and binary
   7  * forms, with or without modification, are permitted
   8  * provided that the following conditions are met:
   9  *
  10  * 1. Redistributions of source code must retain the
  11  *    above copyright notice, this list of conditions
  12  *    and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the
  14  *    above copyright notice, this list of conditions
  15  *    and the following disclaimer in the documentation
  16  *    and/or other materials provided with the
  17  *    distribution.
  18  * 3. The name of the author may not be used to endorse
  19  *    or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
  23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
  24  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
  27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  28  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  30  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  32  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  33  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  34  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  35  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36 */
  37
  38 #ifndef MINIMAL_HEXDUMP_H
  39 #define MINIMAL_HEXDUMP_H
  40
  41 #include "minimal/stdlib.h"
  42
  43 char hexchar(uint8_t value) {
  44     return value < 0x20 || value >= 0x80 ? '.' : value;
  45 }
  46
  47 void hexdump(const char *mark, const uint8_t *data, size_t size) {
  48     int i = 0, j;
  49
  50     while (i != size) {
  51         if (i % 16 == 0)
  52             printf("[%s] 0x%.3x:", mark, i);
  53
  54         printf(" %.2x", data[i]);
  55
  56         if (++i % 16 == 0) {
  57             printf("  ");
  58             for (j = i - 16; j != i; ++j)
  59                 printf("%c", hexchar(data[j]));
  60             printf("\n");
  61         }
  62     }
  63
  64     if (i % 16 != 0) {
  65         for (j = i % 16; j != 16; ++j)
  66             printf("   ");
  67         printf("  ");
  68         for (j = i / 16 * 16; j != i; ++j)
  69             printf("%c", hexchar(data[j]));
  70         printf("\n");
  71     }
  72 }
  73
  74 #endif/*MINIMAL_HEXDUMP_H*/