git.zerfleddert.de Git - hmcfgusb/blob - hexdump.h

   1 /* simple hexdumper
   2  *
   3  * Copyright (c) 2004-2013 Michael Gernoth <michael@gernoth.net>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to
   7  * deal in the Software without restriction, including without limitation the
   8  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   9  * sell copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 static void asciishow(unsigned char *buf, int len)
  25 {
  26         int i;
  27
  28         fprintf(stderr, "  ");
  29         for (i = 0; i < len; i++) {
  30                 if ((buf[i] >=32) && (buf[i] <=126)) {
  31                         fprintf(stderr, "%c", buf[i]);
  32                 } else {
  33                         fprintf(stderr, ".");
  34                 }
  35         }
  36 }
  37
  38 static void hexdump(unsigned char *buf, int len, char *prefix)
  39 {
  40         int i, j;
  41
  42         fprintf(stderr, "\n%s", prefix);
  43         for (i = 0; i < len; i++) {
  44                 if((i%16) == 0) {
  45                         fprintf(stderr, "0x%04x: ", i);
  46                 }
  47                 fprintf(stderr, "%02x ", buf[i]);
  48                 if ((i%16) == 15) {
  49                         asciishow(buf+i-15, 16);
  50                         if (i != (len-1))
  51                                 fprintf(stderr, "\n%s", prefix);
  52                 }
  53         }
  54         for (j = (i%16); j < 16; j++)
  55                 fprintf(stderr, "   ");
  56         asciishow(buf+i-(i%16), (i%16));
  57         fprintf(stderr, "\n");
  58 }