util/hexdump.c

   1 /*
   2  * Helper to hexdump a buffer
   3  *
   4  * Copyright (c) 2013 Red Hat, Inc.
   5  * Copyright (c) 2013 Gerd Hoffmann <kraxel@redhat.com>
   6  * Copyright (c) 2013 Peter Crosthwaite <peter.crosthwaite@xilinx.com>
   7  * Copyright (c) 2013 Xilinx, Inc
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  * Contributions after 2012-01-13 are licensed under the terms of the
  13  * GNU GPL, version 2 or (at your option) any later version.
  14  */
  15
  16 #include "qemu/osdep.h"
  17 #include "qemu-common.h"
  18
  19 void qemu_hexdump(const char *buf, FILE *fp, const char *prefix, size_t size)
  20 {
  21     unsigned int b, len, i, c;
  22
  23     for (b = 0; b < size; b += 16) {
  24         len = size - b;
  25         if (len > 16) {
  26             len = 16;
  27         }
  28         fprintf(fp, "%s: %04x:", prefix, b);
  29         for (i = 0; i < 16; i++) {
  30             if ((i % 4) == 0) {
  31                 fprintf(fp, " ");
  32             }
  33             if (i < len) {
  34                 fprintf(fp, " %02x", (unsigned char)buf[b + i]);
  35             } else {
  36                 fprintf(fp, "   ");
  37             }
  38         }
  39         fprintf(fp, " ");
  40         for (i = 0; i < len; i++) {
  41             c = buf[b + i];
  42             if (c < ' ' || c > '~') {
  43                 c = '.';
  44             }
  45             fprintf(fp, "%c", c);
  46         }
  47         fprintf(fp, "\n");
  48     }
  49 }