libnfc/src/defines.h

/*
 
Public platform independent Near Field Communication (NFC) library
Copyright (C) 2009, Roel Verdult
 
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>

*/

#ifndef _LIBNFC_DEFINES_H_
#define _LIBNFC_DEFINES_H_

// #define DEBUG   /* DEBUG flag can also be enabled using ./configure --enable-debug */

typedef void*               dev_spec; // Device connection specification
#define INVALID_DEVICE_INFO 0
#define MAX_FRAME_LEN       264
#define DEVICE_NAME_LENGTH  256
#define MAX_DEVICES         16

// Useful macros
#ifdef DEBUG
//   #define DBG(x, args...) printf("DBG %s:%d: " x "\n", __FILE__, __LINE__,## args )
  #define DBG(x, ...) printf("DBG %s:%d: " x "\n", __FILE__, __LINE__, ## __VA_ARGS__ )
#else
  #define DBG(...) {}
#endif

#define INFO(x, ...) printf("INFO: " x "\n", ## __VA_ARGS__ )
#define WARN(x, ...) printf("WARNING: " x "\n", ## __VA_ARGS__ )
#define ERR(x, ...) printf("ERROR: " x "\n", ## __VA_ARGS__ )

#if defined __cplusplus 
  #define LIBNFC_EXPORT extern "C" 
#else
  #ifdef _WIN32
    #ifdef nfc_EXPORTS
      #define LIBNFC_EXPORT  __declspec( dllexport )
    #else
      #define LIBNFC_EXPORT  __declspec( dllimport )
    #endif
  #else
    #define LIBNFC_EXPORT 
  #endif
#endif

//#define MIN(a,b) (((a) < (b)) ? (a) : (b))
//#define MAX(a,b) (((a) > (b)) ? (a) : (b))
#define INNER_XOR8(n) {n ^= (n >> 4); n ^= (n >> 2); n ^= (n >> 1); n &= 0x01; }
#define INNER_XOR32(n) {n ^= (n >> 16); n ^= (n >> 8); INNER_XOR8(n); }
#define INNER_XOR64(n) {n ^= (n >> 32); INNER_XOR32(n); }

#endif // _LIBNFC_DEFINES_H_