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List:       kde-devel
Subject:    Re: Byte order conversions
From:       Szombathelyi "György" <gyurco () freemail ! hu>
Date:       2004-10-27 16:42:51
Message-ID: 200410271842.51788.gyurco () freemail ! hu
[Download RAW message or body]

Ok, here comes my version. I'd like to commit it to kdelibs/kdecore, but only 
after I get the green light. Any comments?

Bye,
György

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["kswap.h" (text/x-chdr)]

#ifndef _KSWAP_H_
#define _KSWAP_H_

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <qglobal.h>

#ifdef HAVE_BYTESWAP_H
#include <byteswap.h>

  static inline Q_UINT16 KSWAP_16( Q_UINT16 b ) { return bswap_16( b ); }
  static inline Q_INT16 KSWAP_16( Q_INT16 b ) { return bswap_16( (Q_UINT16)b ); }
  static inline Q_UINT32 KSWAP_32( Q_UINT32 b ) { return bswap_32( b ); }
  static inline Q_INT32 KSWAP_32( Q_INT32 b ) { return bswap_32( (Q_UINT32)b ); }
  static inline Q_UINT64 KSWAP_64( Q_UINT64 b ) { return bswap_64( b ); }
  static inline Q_INT64 KSWAP_64( Q_INT64 b ) { return bswap_64( (Q_UINT64)b ); }

#else /* HAVE_BYTESWAP_H */
#ifdef WORDS_BIGENDIAN
  static inline Q_UINT16 KSWAP_16( Q_UINT16 b ) { 
    return (((b) & 0x00ff) << 8 | ((b) & 0xff00) >> 8); }
  static inline Q_INT16 KSWAP_16( Q_INT16 b ) { 
    return ((((Q_UINT16)b) & 0x00ff) << 8 | (((Q_UINT16)b) & 0xff00) >> 8); }
  static inline Q_UINT32 KSWAP_32( Q_UINT32 b ) {
    return
      ((((b) & 0xff000000) >> 24) | (((b) & 0x00ff0000) >>  8) | \
       (((b) & 0x0000ff00) <<  8) | (((b) & 0x000000ff) << 24)); }
  static inline Q_INT32 KSWAP_32( Q_INT32 b ) {
    return 
      (((((Q_UINT32)b) & 0xff000000) >> 24) | ((((Q_UINT32)b) & 0x00ff0000) >>  8) | \
       ((((Q_UINT32)b) & 0x0000ff00) <<  8) | ((((Q_UINT32)b) & 0x000000ff) << 24)); }
#else /* WORDS_BIGENDIAN */
#include <sys/types.h>
#include <netinet/in.h>

  static inline Q_UINT16 KSWAP_16( Q_UINT16 b ) { 
    return htons(b); }
  static inline Q_INT16 KSWAP_16( Q_INT16 b ) { 
    return htons((Q_UINT16)b); }
  static inline Q_UINT32 KSWAP_32( Q_UINT32 b ) {
    return htonl(b); }
  static inline Q_INT32 KSWAP_32( Q_INT32 b ) {
    return htonl((Q_UINT32)b); }
#endif
  static inline Q_UINT64 KSWAP_64( Q_UINT64 b ) {
    union { 
        Q_UINT64 ll;
        Q_UINT32 l[2]; 
    } w, r;
    w.ll = b;
    r.l[0] = KSWAP_32( w.l[1] );
    r.l[1] = KSWAP_32( w.l[0] );
    return r.ll;
  }
  static inline Q_INT64 KSWAP_64( Q_INT64 b ) {
    union { 
        Q_UINT64 ll;
        Q_UINT32 l[2]; 
    } w, r;
    w.ll = (Q_UINT64) b;
    r.l[0] = KSWAP_32( w.l[1] );
    r.l[1] = KSWAP_32( w.l[0] );
    return r.ll;
  }
#endif	/* !HAVE_BYTESWAP_H */

// KBE2ME ... BigEndian to MachineEndian
// KLE2ME ... LittleEndian to MachineEndian

#ifdef WORDS_BIGENDIAN
#define KBE2ME_16(x) (x)
#define KBE2ME_32(x) (x)
#define KBE2ME_64(x) (x)
#define KLE2ME_16(x) KSWAP_16(x)
#define KLE2ME_32(x) KSWAP_32(x)
#define KLE2ME_64(x) KSWAP_64(x)
#else
#define KBE2ME_16(x) KSWAP_16(x)
#define KBE2ME_32(x) KSWAP_32(x)
#define KBE2ME_64(x) KSWAP_64(x)
#define KLE2ME_16(x) (x)
#define KLE2ME_32(x) (x)
#define KLE2ME_64(x) (x)
#endif

// KME2BE ... MachineEndian to BigEndian 
// KME2LE ... MachineEndian to LittleEndian 

#define KME2BE_16(x) KBE2ME_16(x)
#define KME2BE_32(x) KBE2ME_32(x)
#define KME2BE_64(x) KBE2ME_64(x)
#define KME2LE_16(x) KLE2ME_16(x)
#define KME2LE_32(x) KLE2ME_32(x)
#define KME2LE_64(x) KLE2ME_64(x)

#endif /* _KSWAP_H_ */


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