src/rfid_reader.c

   1 /* librfid - core reader handling
   2  * (C) 2005 by Harald Welte <laforge@gnumonks.org>
   3  */
   4
   5 /*
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License version 2
   8  *  as published by the Free Software Foundation
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22
  23 #include <librfid/rfid.h>
  24 #include <librfid/rfid_reader.h>
  25
  26 static struct rfid_reader *rfid_reader_list;
  27
  28 struct rfid_reader_handle *
  29 rfid_reader_open(void *data, unsigned int id)
  30 {
  31         struct rfid_reader *p;
  32
  33         for (p = rfid_reader_list; p; p = p->next)
  34                 if (p->id == id)
  35                         return p->open(data);
  36
  37         DEBUGP("unable to find matching reader\n");
  38         return NULL;
  39 }
  40
  41 int
  42 rfid_reader_transcieve(struct rfid_reader_handle *rh,
  43                         enum rfid_frametype frametype,
  44                          const unsigned char *tx_buf, unsigned int len,
  45                          unsigned char *rx_buf, unsigned int *rx_len,
  46                          u_int64_t timeout, unsigned int flags)
  47 {
  48         return rh->reader->transcieve(rh, frametype, tx_buf, len, rx_buf,
  49                                       rx_len, timeout, flags);
  50 }
  51
  52 void
  53 rfid_reader_close(struct rfid_reader_handle *rh)
  54 {
  55         rh->reader->close(rh);
  56 }
  57
  58 int
  59 rfid_reader_register(struct rfid_reader *r)
  60 {
  61         r->next = rfid_reader_list;
  62         rfid_reader_list = r;
  63
  64         return 0;
  65 }