putget.h

来自「OTP是开放电信平台的简称」· C头文件 代码 · 共 83 行

/* ``The contents of this file are subject to the Erlang Public License,
 * Version 1.1, (the "License"); you may not use this file except in
 * compliance with the License. You should have received a copy of the
 * Erlang Public License along with this software. If not, it can be
 * retrieved via the world wide web at http://www.erlang.org/.
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 * 
 * The Initial Developer of the Original Code is Ericsson Utvecklings AB.
 * Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
 * AB. All Rights Reserved.''
 * 
 *     $Id$
 */
#ifndef _PUTGET_H
#define _PUTGET_H

#define put8(s,n) do { \
  (s)[0] = (char)((n) & 0xff); \
  (s) += 1; \
} while (0) 
	    
#define put16le(s,n) do { \
  (s)[0] = (n) & 0xff;  \
  (s)[1] = ((n) >>  8) & 0xff; \
  (s) += 2; \
} while (0) \
     
#define put32le(s,n) do { \
  (s)[0] = (n) & 0xff;  \
  (s)[1] = ((n) >>  8) & 0xff; \
  (s)[2] = ((n) >>  16) & 0xff; \
  (s)[3] = ((n) >>  24) & 0xff; \
  (s) += 4; \
} while (0)
	    
#define put16be(s,n) do { \
  (s)[0] = ((n) >>  8) & 0xff; \
  (s)[1] = (n) & 0xff; \
  (s) += 2; \
} while (0)
     
#define put32be(s,n) do {  \
  (s)[0] = ((n) >>  24) & 0xff; \
  (s)[1] = ((n) >>  16) & 0xff; \
  (s)[2] = ((n) >>  8) & 0xff;  \
  (s)[3] = (n) & 0xff; \
  (s) += 4; \
} while (0)

#define get8(s) \
     ((s) += 1, \
      ((unsigned char *)(s))[-1] & 0xff)
     
#define get16le(s) \
     ((s) += 2, \
      (((((unsigned char *)(s))[-1] << 8) | \
	((unsigned char *)(s))[-2])) & 0xffff)
     
#define get32le(s) \
     ((s) += 4, \
      ((((unsigned char *)(s))[-1] << 24) | \
       (((unsigned char *)(s))[-2] << 16) | \
       (((unsigned char *)(s))[-3] << 8) | \
       ((unsigned char *)(s))[-4]))

#define get16be(s) \
     ((s) += 2, \
      (((((unsigned char *)(s))[-2] << 8) | \
	((unsigned char *)(s))[-1])) & 0xffff) 
     
#define get32be(s) \
     ((s) += 4, \
      ((((unsigned char *)(s))[-4] << 24) | \
       (((unsigned char *)(s))[-3] << 16) | \
       (((unsigned char *)(s))[-2] << 8) | \
       ((unsigned char *)(s))[-1]))
     
#endif /* _PUTGET_H */