1 /*
   2  * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 #ifndef JDWP_UTIL_MD_H
  27 #define JDWP_UTIL_MD_H
  28 
  29 #include <stddef.h>
  30 #include <stdint.h>  /* To get uintptr_t */
  31 
  32 #include <limits.h>
  33 #include <sys/types.h>
  34 #ifdef _ALLBSD_SOURCE
  35 #include <machine/endian.h>
  36 #elif __linux__
  37 #include <endian.h>
  38 #endif
  39 
  40 #ifdef _LP64
  41 typedef unsigned long UNSIGNED_JLONG;
  42 typedef unsigned int UNSIGNED_JINT;
  43 #else /* _LP64 */
  44 typedef unsigned long long UNSIGNED_JLONG;
  45 typedef unsigned long UNSIGNED_JINT;
  46 #endif /* _LP64 */
  47 
  48 #ifndef MAXPATHLEN
  49 #define MAXPATHLEN              PATH_MAX
  50 #endif
  51 
  52 /* On little endian machines, convert java big endian numbers. */
  53 
  54 #if defined(_LITTLE_ENDIAN)
  55 
  56 #define HOST_TO_JAVA_CHAR(x) (((x & 0xff) << 8) | ((x >> 8) & (0xff)))
  57 #define HOST_TO_JAVA_SHORT(x) (((x & 0xff) << 8) | ((x >> 8) & (0xff)))
  58 #define HOST_TO_JAVA_INT(x)                                             \
  59                   ((x << 24) |                                          \
  60                    ((x & 0x0000ff00) << 8) |                            \
  61                    ((x & 0x00ff0000) >> 8) |                            \
  62                    (((UNSIGNED_JINT)(x & 0xff000000)) >> 24))
  63 #define HOST_TO_JAVA_LONG(x)                                            \
  64                   ((x << 56) |                                          \
  65                    ((x & 0x000000000000ff00) << 40) |                   \
  66                    ((x & 0x0000000000ff0000) << 24) |                   \
  67                    ((x & 0x00000000ff000000) << 8) |                    \
  68                    ((x & 0x000000ff00000000) >> 8) |                    \
  69                    ((x & 0x0000ff0000000000) >> 24) |                   \
  70                    ((x & 0x00ff000000000000) >> 40) |                   \
  71                    (((UNSIGNED_JLONG)(x & 0xff00000000000000)) >> 56))
  72 #define HOST_TO_JAVA_FLOAT(x) stream_encodeFloat(x)
  73 #define HOST_TO_JAVA_DOUBLE(x) stream_encodeDouble(x)
  74 
  75 #else
  76 
  77 #define HOST_TO_JAVA_CHAR(x)   (x)
  78 #define HOST_TO_JAVA_SHORT(x)  (x)
  79 #define HOST_TO_JAVA_INT(x)    (x)
  80 #define HOST_TO_JAVA_LONG(x)   (x)
  81 #define HOST_TO_JAVA_FLOAT(x)  (x)
  82 #define HOST_TO_JAVA_DOUBLE(x) (x)
  83 
  84 #endif
  85 
  86 #define JAVA_TO_HOST_CHAR(x)   HOST_TO_JAVA_CHAR(x)
  87 #define JAVA_TO_HOST_SHORT(x)  HOST_TO_JAVA_SHORT(x)
  88 #define JAVA_TO_HOST_INT(x)    HOST_TO_JAVA_INT(x)
  89 #define JAVA_TO_HOST_LONG(x)   HOST_TO_JAVA_LONG(x)
  90 #define JAVA_TO_HOST_FLOAT(x)  HOST_TO_JAVA_FLOAT(x)
  91 #define JAVA_TO_HOST_DOUBLE(x) HOST_TO_JAVA_DOUBLE(x)
  92 
  93 #endif