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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
94