1 /*- 2 * See the file LICENSE for redistribution information. 3 * 4 * Copyright (c) 1996, 1997 5 * Sleepycat Software. All rights reserved. 6 */ 7 /* 8 * Copyright (c) 1998 by Sun Microsystems, Inc. 9 * All rights reserved. 10 */ 11 12 #include "config.h" 13 14 #pragma ident "%Z%%M% %I% %E% SMI" 15 16 #ifndef lint 17 static const char sccsid[] = "@(#)db_byteorder.c 10.4 (Sleepycat) 9/4/97"; 18 static const char sccsi2[] = "%W% (Sun) %G%"; 19 #endif /* not lint */ 20 21 #ifndef NO_SYSTEM_INCLUDES 22 #include <sys/types.h> 23 24 #ifdef HAVE_ENDIAN_H 25 #include <endian.h> 26 #if BYTE_ORDER == BIG_ENDIAN 27 #define WORDS_BIGENDIAN 1 28 #endif 29 #endif 30 31 #include <errno.h> 32 #endif 33 34 #include "db_int.h" 35 #include "common_ext.h" 36 37 /* 38 * __db_byteorder -- 39 * Return if we need to do byte swapping, checking for illegal 40 * values. 41 * 42 * PUBLIC: int __db_byteorder __P((DB_ENV *, int)); 43 */ 44 int __db_byteorder(dbenv,lorder)45__db_byteorder(dbenv, lorder) 46 DB_ENV *dbenv; 47 int lorder; 48 { 49 switch (lorder) { 50 case 0: 51 break; 52 case 1234: 53 #if defined(WORDS_BIGENDIAN) 54 return (DB_SWAPBYTES); 55 #else 56 break; 57 #endif 58 case 4321: 59 #if defined(WORDS_BIGENDIAN) 60 break; 61 #else 62 return (DB_SWAPBYTES); 63 #endif 64 default: 65 __db_err(dbenv, 66 "illegal byte order, only big and little-endian supported"); 67 return (EINVAL); 68 } 69 return (0); 70 } 71