xfindproxy.h revision b8f75c19 
1/* $Xorg: xfindproxy.h,v 1.4 2001/02/09 02:05:42 xorgcvs Exp $ */
2
3/*
4Copyright 1996, 1998  The Open Group
5
6Permission to use, copy, modify, distribute, and sell this software and its
7documentation for any purpose is hereby granted without fee, provided that
8the above copyright notice appear in all copies and that both that
9copyright notice and this permission notice appear in supporting
10documentation.
11
12The above copyright notice and this permission notice shall be included
13in all copies or substantial portions of the Software.
14
15THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
19OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21OTHER DEALINGS IN THE SOFTWARE.
22
23Except as contained in this notice, the name of The Open Group shall
24not be used in advertising or otherwise to promote the sale, use or
25other dealings in this Software without prior written authorization
26from The Open Group.
27*/
28
29
30/*
31 * Pad to a 64 bit boundary
32 */
33
34#define PAD64(_bytes) ((8 - ((unsigned int) (_bytes) % 8)) % 8)
35
36#define PADDED_BYTES64(_bytes) (_bytes + PAD64 (_bytes))
37
38
39/*
40 * Number of 8 byte units in _bytes.
41 */
42
43#define WORD64COUNT(_bytes) (((unsigned int) ((_bytes) + 7)) >> 3)
44
45
46/*
47 * Compute the number of bytes for a STRING representation
48 */
49
50#define STRING_BYTES(_str) (2 + (_str ? strlen (_str) : 0) + \
51		     PAD64 (2 + (_str ? strlen (_str) : 0)))
52
53
54
55#define SKIP_STRING(_pBuf, _swap) \
56{ \
57    CARD16 _len; \
58    EXTRACT_CARD16 (_pBuf, _swap, _len); \
59    _pBuf += _len; \
60    if (PAD64 (2 + _len)) \
61        _pBuf += PAD64 (2 + _len); \
62}
63
64/*
65 * STORE macros
66 */
67
68#define STORE_CARD16(_pBuf, _val) \
69{ \
70    *((CARD16 *) _pBuf) = _val; \
71    _pBuf += 2; \
72}
73
74#define STORE_STRING(_pBuf, _string) \
75{ \
76    int _len = _string ? strlen (_string) : 0; \
77    STORE_CARD16 (_pBuf, _len); \
78    if (_len) { \
79        memcpy (_pBuf, _string, _len); \
80        _pBuf += _len; \
81    } \
82    if (PAD64 (2 + _len)) \
83        _pBuf += PAD64 (2 + _len); \
84}
85
86
87/*
88 * EXTRACT macros
89 */
90
91#define EXTRACT_CARD16(_pBuf, _swap, _val) \
92{ \
93    _val = *((CARD16 *) _pBuf); \
94    _pBuf += 2; \
95    if (_swap) \
96        _val = lswaps (_val); \
97}
98
99#define EXTRACT_STRING(_pBuf, _swap, _string) \
100{ \
101    CARD16 _len; \
102    EXTRACT_CARD16 (_pBuf, _swap, _len); \
103    _string = (char *) malloc (_len + 1); \
104    memcpy (_string, _pBuf, _len); \
105    _string[_len] = '\0'; \
106    _pBuf += _len; \
107    if (PAD64 (2 + _len)) \
108        _pBuf += PAD64 (2 + _len); \
109}
110
111
112/*
113 * Byte swapping
114 */
115
116/* byte swap a long literal */
117#define lswapl(_val) ((((_val) & 0xff) << 24) |\
118		   (((_val) & 0xff00) << 8) |\
119		   (((_val) & 0xff0000) >> 8) |\
120		   (((_val) >> 24) & 0xff))
121
122/* byte swap a short literal */
123#define lswaps(_val) ((((_val) & 0xff) << 8) | (((_val) >> 8) & 0xff))
124
125
126#define CHECK_AT_LEAST_SIZE(_iceConn, _majorOp, _minorOp, _expected_len, _actual_len, _severity) \
127    if ((((_actual_len) - SIZEOF (iceMsg)) >> 3) > _expected_len) \
128    { \
129       _IceErrorBadLength (_iceConn, _majorOp, _minorOp, _severity); \
130       return; \
131    }
132
133
134#define CHECK_COMPLETE_SIZE(_iceConn, _majorOp, _minorOp, _expected_len, _actual_len, _pStart, _severity) \
135    if (((PADDED_BYTES64((_actual_len)) - SIZEOF (iceMsg)) >> 3) \
136        != _expected_len) \
137    { \
138       _IceErrorBadLength (_iceConn, _majorOp, _minorOp, _severity); \
139       IceDisposeCompleteMessage (iceConn, _pStart); \
140       return; \
141    }
142