| 1 | /***********************************************************
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| 2 |
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| 3 | Copyright 1987, 1998 The Open Group
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| 4 |
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| 5 | Permission to use, copy, modify, distribute, and sell this software and its
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| 6 | documentation for any purpose is hereby granted without fee, provided that
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| 7 | the above copyright notice appear in all copies and that both that
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| 8 | copyright notice and this permission notice appear in supporting
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| 9 | documentation.
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| 10 |
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| 11 | The above copyright notice and this permission notice shall be included in
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| 12 | all copies or substantial portions of the Software.
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| 13 |
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| 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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| 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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| 17 | OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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| 18 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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| 19 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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| 20 |
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| 21 | Except as contained in this notice, the name of The Open Group shall not be
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| 22 | used in advertising or otherwise to promote the sale, use or other dealings
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| 23 | in this Software without prior written authorization from The Open Group.
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| 24 |
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| 25 | Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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| 26 |
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| 27 | All Rights Reserved
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| 28 |
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| 29 | Permission to use, copy, modify, and distribute this software and its
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| 30 | documentation for any purpose and without fee is hereby granted,
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| 31 | provided that the above copyright notice appear in all copies and that
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| 32 | both that copyright notice and this permission notice appear in
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| 33 | supporting documentation, and that the name of Digital not be
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| 34 | used in advertising or publicity pertaining to distribution of the
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| 35 | software without specific, written prior permission.
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| 36 |
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| 37 | DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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| 38 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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| 39 | DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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| 40 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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| 41 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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| 42 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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| 43 | SOFTWARE.
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| 44 |
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| 45 | Copyright 1992, 1993 Data General Corporation;
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| 46 | Copyright 1992, 1993 OMRON Corporation
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| 47 |
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| 48 | Permission to use, copy, modify, distribute, and sell this software and its
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| 49 | documentation for any purpose is hereby granted without fee, provided that the
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| 50 | above copyright notice appear in all copies and that both that copyright
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| 51 | notice and this permission notice appear in supporting documentation, and that
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| 52 | neither the name OMRON or DATA GENERAL be used in advertising or publicity
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| 53 | pertaining to distribution of the software without specific, written prior
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| 54 | permission of the party whose name is to be used. Neither OMRON or
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| 55 | DATA GENERAL make any representation about the suitability of this software
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| 56 | for any purpose. It is provided "as is" without express or implied warranty.
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| 57 |
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| 58 | OMRON AND DATA GENERAL EACH DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
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| 59 | SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
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| 60 | IN NO EVENT SHALL OMRON OR DATA GENERAL BE LIABLE FOR ANY SPECIAL, INDIRECT
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| 61 | OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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| 62 | DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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| 63 | TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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| 64 | OF THIS SOFTWARE.
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| 65 |
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| 66 | ******************************************************************/
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| 67 | #ifndef MISC_H
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| 68 | #define MISC_H 1
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| 69 | /*
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| 70 | * X internal definitions
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| 71 | *
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| 72 | */
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| 73 |
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| 74 | #include <X11/Xosdefs.h>
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| 75 | #include <X11/Xfuncproto.h>
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| 76 | #include <X11/Xmd.h>
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| 77 | #include <X11/X.h>
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| 78 | #include <X11/Xdefs.h>
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| 79 |
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| 80 | #include <stddef.h>
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| 81 | #include <stdint.h>
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| 82 |
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| 83 | #ifndef MAXSCREENS
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| 84 | #define MAXSCREENS 16
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| 85 | #endif
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| 86 | #ifndef MAXGPUSCREENS
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| 87 | #define MAXGPUSCREENS 16
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| 88 | #endif
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| 89 | #define MAXCLIENTS 512
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| 90 | #define LIMITCLIENTS 256 /* Must be a power of 2 and <= MAXCLIENTS */
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| 91 | #define MAXEXTENSIONS 128
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| 92 | #define MAXFORMATS 8
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| 93 | #define MAXDEVICES 40 /* input devices */
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| 94 | #define GPU_SCREEN_OFFSET 256
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| 95 |
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| 96 | /* 128 event opcodes for core + extension events, excluding GE */
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| 97 | #define MAXEVENTS 128
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| 98 | #define EXTENSION_EVENT_BASE 64
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| 99 | #define EXTENSION_BASE 128
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| 100 |
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| 101 | typedef uint32_t ATOM;
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| 102 |
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| 103 | #ifndef TRUE
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| 104 | #define TRUE 1
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| 105 | #define FALSE 0
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| 106 | #endif
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| 107 |
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| 108 | #ifndef _XTYPEDEF_CALLBACKLISTPTR
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| 109 | typedef struct _CallbackList *CallbackListPtr; /* also in dix.h */
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| 110 |
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| 111 | #define _XTYPEDEF_CALLBACKLISTPTR
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| 112 | #endif
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| 113 |
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| 114 | typedef struct _xReq *xReqPtr;
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| 115 |
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| 116 | #include "os.h" /* for ALLOCATE_LOCAL and DEALLOCATE_LOCAL */
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| 117 | #include <X11/Xfuncs.h> /* for bcopy, bzero, and bcmp */
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| 118 |
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| 119 | #define NullBox ((BoxPtr)0)
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| 120 | #define MILLI_PER_MIN (1000 * 60)
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| 121 | #define MILLI_PER_SECOND (1000)
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| 122 |
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| 123 | /* this next is used with None and ParentRelative to tell
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| 124 | PaintWin() what to use to paint the background. Also used
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| 125 | in the macro IS_VALID_PIXMAP */
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| 126 |
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| 127 | #define USE_BACKGROUND_PIXEL 3
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| 128 | #define USE_BORDER_PIXEL 3
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| 129 |
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| 130 | /* byte swap a 32-bit literal */
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| 131 | static inline uint32_t
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| 132 | lswapl(uint32_t x)
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| 133 | {
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| 134 | return ((x & 0xff) << 24) |
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| 135 | ((x & 0xff00) << 8) | ((x & 0xff0000) >> 8) | ((x >> 24) & 0xff);
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| 136 | }
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| 137 |
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| 138 | /* byte swap a 16-bit literal */
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| 139 | static inline uint16_t
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| 140 | lswaps(uint16_t x)
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| 141 | {
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| 142 | return (uint16_t)((x & 0xff) << 8) | ((x >> 8) & 0xff);
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| 143 | }
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| 144 |
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| 145 | #undef min
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| 146 | #undef max
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| 147 |
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| 148 | #define min(a, b) (((a) < (b)) ? (a) : (b))
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| 149 | #define max(a, b) (((a) > (b)) ? (a) : (b))
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| 150 | /* abs() is a function, not a macro; include the file declaring
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| 151 | * it in case we haven't done that yet.
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| 152 | */
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| 153 | #include <stdlib.h>
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| 154 | #define sign(x) ((x) < 0 ? -1 : ((x) > 0 ? 1 : 0))
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| 155 | /* this assumes b > 0 */
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| 156 | #define modulus(a, b, d) if (((d) = (a) % (b)) < 0) (d) += (b)
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| 157 | /*
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| 158 | * return the least significant bit in x which is set
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| 159 | *
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| 160 | * This works on 1's complement and 2's complement machines.
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| 161 | * If you care about the extra instruction on 2's complement
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| 162 | * machines, change to ((x) & (-(x)))
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| 163 | */
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| 164 | #define lowbit(x) ((x) & (~(x) + 1))
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| 165 |
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| 166 | /* XXX Not for modules */
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| 167 | #include <limits.h>
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| 168 | #if !defined(MAXSHORT) || !defined(MINSHORT) || \
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| 169 | !defined(MAXINT) || !defined(MININT)
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| 170 | /*
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| 171 | * Some implementations #define these through <math.h>, so preclude
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| 172 | * #include'ing it later.
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| 173 | */
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| 174 |
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| 175 | #include <math.h>
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| 176 | #undef MAXSHORT
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| 177 | #define MAXSHORT SHRT_MAX
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| 178 | #undef MINSHORT
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| 179 | #define MINSHORT SHRT_MIN
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| 180 | #undef MAXINT
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| 181 | #define MAXINT INT_MAX
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| 182 | #undef MININT
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| 183 | #define MININT INT_MIN
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| 184 |
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| 185 | #include <assert.h>
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| 186 | #include <ctype.h>
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| 187 | #include <stdio.h> /* for fopen, etc... */
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| 188 |
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| 189 | #endif
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| 190 |
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| 191 | #ifndef PATH_MAX
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| 192 | #include <sys/param.h>
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| 193 | #ifndef PATH_MAX
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| 194 | #ifdef MAXPATHLEN
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| 195 | #define PATH_MAX MAXPATHLEN
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| 196 | #else
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| 197 | #define PATH_MAX 1024
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| 198 | #endif
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| 199 | #endif
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| 200 | #endif
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| 201 |
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| 202 | /**
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| 203 | * Calculate the number of bytes needed to hold bits.
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| 204 | * @param bits The minimum number of bits needed.
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| 205 | * @return The number of bytes needed to hold bits.
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| 206 | */
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| 207 | static inline int
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| 208 | bits_to_bytes(const int bits)
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| 209 | {
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| 210 | return ((bits + 7) >> 3);
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| 211 | }
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| 212 |
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| 213 | /**
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| 214 | * Calculate the number of 4-byte units needed to hold the given number of
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| 215 | * bytes.
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| 216 | * @param bytes The minimum number of bytes needed.
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| 217 | * @return The number of 4-byte units needed to hold bytes.
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| 218 | */
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| 219 | static inline int
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| 220 | bytes_to_int32(const int bytes)
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| 221 | {
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| 222 | return (((bytes) + 3) >> 2);
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| 223 | }
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| 224 |
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| 225 | /**
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| 226 | * Calculate the number of bytes (in multiples of 4) needed to hold bytes.
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| 227 | * @param bytes The minimum number of bytes needed.
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| 228 | * @return The closest multiple of 4 that is equal or higher than bytes.
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| 229 | */
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| 230 | static inline int
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| 231 | pad_to_int32(const int bytes)
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| 232 | {
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| 233 | return (((bytes) + 3) & ~3);
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| 234 | }
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| 235 |
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| 236 | /**
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| 237 | * Calculate padding needed to bring the number of bytes to an even
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| 238 | * multiple of 4.
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| 239 | * @param bytes The minimum number of bytes needed.
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| 240 | * @return The bytes of padding needed to arrive at the closest multiple of 4
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| 241 | * that is equal or higher than bytes.
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| 242 | */
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| 243 | static inline int
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| 244 | padding_for_int32(const int bytes)
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| 245 | {
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| 246 | return ((-bytes) & 3);
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| 247 | }
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| 248 |
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| 249 |
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| 250 | extern char **xstrtokenize(const char *str, const char *separators);
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| 251 | extern void FormatInt64(int64_t num, char *string);
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| 252 | extern void FormatUInt64(uint64_t num, char *string);
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| 253 | extern void FormatUInt64Hex(uint64_t num, char *string);
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| 254 | extern void FormatDouble(double dbl, char *string);
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| 255 |
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| 256 | /**
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| 257 | * Compare the two version numbers comprising of major.minor.
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| 258 | *
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| 259 | * @return A value less than 0 if a is less than b, 0 if a is equal to b,
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| 260 | * or a value greater than 0
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| 261 | */
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| 262 | static inline int
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| 263 | version_compare(uint32_t a_major, uint32_t a_minor,
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| 264 | uint32_t b_major, uint32_t b_minor)
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| 265 | {
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| 266 | if (a_major > b_major)
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| 267 | return 1;
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| 268 | if (a_major < b_major)
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| 269 | return -1;
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| 270 | if (a_minor > b_minor)
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| 271 | return 1;
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| 272 | if (a_minor < b_minor)
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| 273 | return -1;
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| 274 |
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| 275 | return 0;
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| 276 | }
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| 277 |
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| 278 | /* some macros to help swap requests, replies, and events */
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| 279 |
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| 280 | #define LengthRestB(stuff) \
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| 281 | ((client->req_len << 2) - sizeof(*stuff))
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| 282 |
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| 283 | #define LengthRestS(stuff) \
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| 284 | ((client->req_len << 1) - (sizeof(*stuff) >> 1))
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| 285 |
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| 286 | #define LengthRestL(stuff) \
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| 287 | (client->req_len - (sizeof(*stuff) >> 2))
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| 288 |
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| 289 | #define SwapRestS(stuff) \
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| 290 | SwapShorts((short *)(stuff + 1), LengthRestS(stuff))
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| 291 |
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| 292 | #define SwapRestL(stuff) \
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| 293 | SwapLongs((CARD32 *)(stuff + 1), LengthRestL(stuff))
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| 294 |
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| 295 | #if defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
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| 296 | void __attribute__ ((error("wrong sized variable passed to swap")))
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| 297 | wrong_size(void);
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| 298 | #else
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| 299 | static inline void
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| 300 | wrong_size(void)
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| 301 | {
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| 302 | }
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| 303 | #endif
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| 304 |
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| 305 | #if !(defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)))
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| 306 | static inline int
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| 307 | __builtin_constant_p(int x)
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| 308 | {
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| 309 | return 0;
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| 310 | }
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| 311 | #endif
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| 312 |
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| 313 | /* byte swap a 64-bit value */
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| 314 | static inline void
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| 315 | swap_uint64(uint64_t *x)
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| 316 | {
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| 317 | char n;
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| 318 |
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| 319 | n = ((char *) x)[0];
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| 320 | ((char *) x)[0] = ((char *) x)[7];
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| 321 | ((char *) x)[7] = n;
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| 322 |
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| 323 | n = ((char *) x)[1];
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| 324 | ((char *) x)[1] = ((char *) x)[6];
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| 325 | ((char *) x)[6] = n;
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| 326 |
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| 327 | n = ((char *) x)[2];
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| 328 | ((char *) x)[2] = ((char *) x)[5];
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| 329 | ((char *) x)[5] = n;
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| 330 |
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| 331 | n = ((char *) x)[3];
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| 332 | ((char *) x)[3] = ((char *) x)[4];
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| 333 | ((char *) x)[4] = n;
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| 334 | }
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| 335 |
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| 336 | #define swapll(x) do { \
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| 337 | if (sizeof(*(x)) != 8) \
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| 338 | wrong_size(); \
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| 339 | swap_uint64((uint64_t *)(x)); \
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| 340 | } while (0)
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| 341 |
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| 342 | /* byte swap a 32-bit value */
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| 343 | static inline void
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| 344 | swap_uint32(uint32_t * x)
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| 345 | {
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| 346 | char n = ((char *) x)[0];
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| 347 |
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| 348 | ((char *) x)[0] = ((char *) x)[3];
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| 349 | ((char *) x)[3] = n;
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| 350 | n = ((char *) x)[1];
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| 351 | ((char *) x)[1] = ((char *) x)[2];
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| 352 | ((char *) x)[2] = n;
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| 353 | }
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| 354 |
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| 355 | #define swapl(x) do { \
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| 356 | if (sizeof(*(x)) != 4) \
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| 357 | wrong_size(); \
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| 358 | if (__builtin_constant_p((uintptr_t)(x) & 3) && ((uintptr_t)(x) & 3) == 0) \
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| 359 | *(x) = lswapl(*(x)); \
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| 360 | else \
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| 361 | swap_uint32((uint32_t *)(x)); \
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| 362 | } while (0)
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| 363 |
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| 364 | /* byte swap a 16-bit value */
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| 365 | static inline void
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| 366 | swap_uint16(uint16_t * x)
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| 367 | {
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| 368 | char n = ((char *) x)[0];
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| 369 |
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| 370 | ((char *) x)[0] = ((char *) x)[1];
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| 371 | ((char *) x)[1] = n;
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| 372 | }
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| 373 |
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| 374 | #define swaps(x) do { \
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| 375 | if (sizeof(*(x)) != 2) \
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| 376 | wrong_size(); \
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| 377 | if (__builtin_constant_p((uintptr_t)(x) & 1) && ((uintptr_t)(x) & 1) == 0) \
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| 378 | *(x) = lswaps(*(x)); \
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| 379 | else \
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| 380 | swap_uint16((uint16_t *)(x)); \
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| 381 | } while (0)
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| 382 |
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| 383 | /* copy 32-bit value from src to dst byteswapping on the way */
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| 384 | #define cpswapl(src, dst) do { \
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| 385 | if (sizeof((src)) != 4 || sizeof((dst)) != 4) \
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| 386 | wrong_size(); \
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| 387 | (dst) = lswapl((src)); \
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| 388 | } while (0)
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| 389 |
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| 390 | /* copy short from src to dst byteswapping on the way */
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| 391 | #define cpswaps(src, dst) do { \
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| 392 | if (sizeof((src)) != 2 || sizeof((dst)) != 2) \
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| 393 | wrong_size(); \
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| 394 | (dst) = lswaps((src)); \
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| 395 | } while (0)
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| 396 |
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| 397 | extern _X_EXPORT void SwapLongs(CARD32 *list, unsigned long count);
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| 398 |
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| 399 | extern _X_EXPORT void SwapShorts(short *list, unsigned long count);
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| 400 |
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| 401 | extern _X_EXPORT void MakePredeclaredAtoms(void);
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| 402 |
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| 403 | extern _X_EXPORT int Ones(unsigned long /*mask */ );
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| 404 |
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| 405 | typedef struct _xPoint *DDXPointPtr;
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| 406 | typedef struct pixman_box16 *BoxPtr;
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| 407 | typedef struct _xEvent *xEventPtr;
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| 408 | typedef struct _xRectangle *xRectanglePtr;
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| 409 | typedef struct _GrabRec *GrabPtr;
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| 410 |
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| 411 | /* typedefs from other places - duplicated here to minimize the amount
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| 412 | * of unnecessary junk that one would normally have to include to get
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| 413 | * these symbols defined
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| 414 | */
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| 415 |
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| 416 | #ifndef _XTYPEDEF_CHARINFOPTR
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| 417 | typedef struct _CharInfo *CharInfoPtr; /* also in fonts/include/font.h */
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| 418 |
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| 419 | #define _XTYPEDEF_CHARINFOPTR
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| 420 | #endif
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| 421 |
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| 422 | extern _X_EXPORT unsigned long globalSerialNumber;
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| 423 | extern _X_EXPORT unsigned long serverGeneration;
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| 424 |
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| 425 | /* Don't use this directly, use BUG_WARN or BUG_WARN_MSG instead */
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| 426 | #define __BUG_WARN_MSG(cond, with_msg, ...) \
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| 427 | do { if (cond) { \
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| 428 | ErrorFSigSafe("BUG: triggered 'if (" #cond ")'\n"); \
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| 429 | ErrorFSigSafe("BUG: %s:%u in %s()\n", \
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| 430 | __FILE__, __LINE__, __func__); \
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| 431 | if (with_msg) ErrorFSigSafe(__VA_ARGS__); \
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| 432 | xorg_backtrace(); \
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| 433 | } } while(0)
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| 434 |
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| 435 | #define BUG_WARN_MSG(cond, ...) \
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| 436 | __BUG_WARN_MSG(cond, 1, __VA_ARGS__)
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| 437 |
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| 438 | #define BUG_WARN(cond) __BUG_WARN_MSG(cond, 0, NULL)
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| 439 |
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| 440 | #define BUG_RETURN(cond) \
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| 441 | do { if (cond) { __BUG_WARN_MSG(cond, 0, NULL); return; } } while(0)
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| 442 |
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| 443 | #define BUG_RETURN_MSG(cond, ...) \
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| 444 | do { if (cond) { __BUG_WARN_MSG(cond, 1, __VA_ARGS__); return; } } while(0)
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| 445 |
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| 446 | #define BUG_RETURN_VAL(cond, val) \
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| 447 | do { if (cond) { __BUG_WARN_MSG(cond, 0, NULL); return (val); } } while(0)
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| 448 |
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| 449 | #define BUG_RETURN_VAL_MSG(cond, val, ...) \
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| 450 | do { if (cond) { __BUG_WARN_MSG(cond, 1, __VA_ARGS__); return (val); } } while(0)
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| 451 |
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| 452 | #endif /* MISC_H */
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