nfc-utils.h 3.32 KB
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/*-
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 * Free/Libre Near Field Communication (NFC) library
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 *
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 * Libnfc historical contributors:
 * Copyright (C) 2009      Roel Verdult
 * Copyright (C) 2009-2013 Romuald Conty
 * Copyright (C) 2010-2012 Romain Tartière
 * Copyright (C) 2010-2013 Philippe Teuwen
 * Copyright (C) 2012-2013 Ludovic Rousseau
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 * See AUTHORS file for a more comprehensive list of contributors.
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 * Additional contributors of this file:
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 *
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *  1) Redistributions of source code must retain the above copyright notice,
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 *  this list of conditions and the following disclaimer.
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 *  2 )Redistributions in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in the
 *  documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
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 *
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 * Note that this license only applies on the examples, NFC library itself is under LGPL
 *
 */

/**
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 * @file nfc-utils.h
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 * @brief Provide some examples shared functions like print, parity calculation, options parsing.
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 */

#ifndef _EXAMPLES_NFC_UTILS_H_
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#  define _EXAMPLES_NFC_UTILS_H_
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#  include <stdlib.h>
#  include <string.h>
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#  include <err.h>
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/**
 * @macro DBG
 * @brief Print a message of standard output only in DEBUG mode
 */
#ifdef DEBUG
#  define DBG(...) do { \
    warnx ("DBG %s:%d", __FILE__, __LINE__); \
    warnx ("    " __VA_ARGS__ ); \
  } while (0)
#else
#  define DBG(...) {}
#endif

/**
 * @macro WARN
 * @brief Print a warn message
 */
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#ifdef DEBUG
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#  define WARN(...) do { \
    warnx ("WARNING %s:%d", __FILE__, __LINE__); \
    warnx ("    " __VA_ARGS__ ); \
  } while (0)
#else
#  define WARN(...) warnx ("WARNING: " __VA_ARGS__ )
#endif

/**
 * @macro ERR
 * @brief Print a error message
 */
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#ifdef DEBUG
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#  define ERR(...) do { \
    warnx ("ERROR %s:%d", __FILE__, __LINE__); \
    warnx ("    " __VA_ARGS__ ); \
  } while (0)
#else
#  define ERR(...)  warnx ("ERROR: " __VA_ARGS__ )
#endif

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#ifndef MIN
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
#endif

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uint8_t  oddparity(const uint8_t bt);
void    oddparity_bytes_ts(const uint8_t *pbtData, const size_t szLen, uint8_t *pbtPar);
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void    print_hex(const uint8_t *pbtData, const size_t szLen);
void    print_hex_bits(const uint8_t *pbtData, const size_t szBits);
void    print_hex_par(const uint8_t *pbtData, const size_t szBits, const uint8_t *pbtDataPar);
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void    print_nfc_target(const nfc_target *pnt, bool verbose);
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#endif