libnfc/src/include/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/>
 * 
 * 
 * @file defines.h
 * @brief
 */

#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

#if defined __cplusplus
  #define LIBNFC_EXTERN_C extern "C"
#else
  #define LIBNFC_EXTERN_C 
#endif

#ifdef _WIN32
  #ifdef nfc_EXPORTS
    #define LIBNFC_DECLSPEC  __declspec( dllexport )
  #else
    #define LIBNFC_DECLSPEC  __declspec( dllimport )
  #endif
#else
  #define LIBNFC_DECLSPEC 
#endif

#define LIBNFC_EXPORT LIBNFC_EXTERN_C LIBNFC_DECLSPEC

//#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_