common/iso15693tools.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
   3 //
   4 // This program is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // See LICENSE.txt for the text of the license.
  15 //-----------------------------------------------------------------------------
  16 // ISO15693 other commons
  17 //-----------------------------------------------------------------------------
  18 #include "iso15693tools.h"
  19
  20 #include <stdio.h>
  21
  22
  23 #define ISO15693_SPRINTUID_BUFLEN (3 * 8 + 1)
  24
  25 // returns a string representation of the UID
  26 // UID is transmitted and stored LSB first, displayed MSB first
  27 // dest    char* buffer, where to put the UID, if NULL a static buffer is returned
  28 // uid[]     the UID in transmission order
  29 // return: ptr to string
  30 char *iso15693_sprintUID(char *dest, uint8_t *uid) {
  31     static char tempbuf[ISO15693_SPRINTUID_BUFLEN] = {0};
  32     if (dest == NULL)
  33         dest = tempbuf;
  34
  35     if (uid) {
  36 #ifdef HAVE_SNPRINTF
  37         snprintf(dest, ISO15693_SPRINTUID_BUFLEN,
  38 #else
  39         sprintf(dest,
  40 #endif
  41                  "%02X %02X %02X %02X %02X %02X %02X %02X",
  42                  uid[7], uid[6], uid[5], uid[4],
  43                  uid[3], uid[2], uid[1], uid[0]
  44                 );
  45     }
  46     return dest;
  47 }