441 lines
13 KiB
C
441 lines
13 KiB
C
/***********************************************************
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Copyright 1987, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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Copyright 1992, 1993 Data General Corporation;
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Copyright 1992, 1993 OMRON Corporation
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that the
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above copyright notice appear in all copies and that both that copyright
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notice and this permission notice appear in supporting documentation, and that
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neither the name OMRON or DATA GENERAL be used in advertising or publicity
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pertaining to distribution of the software without specific, written prior
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permission of the party whose name is to be used. Neither OMRON or
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DATA GENERAL make any representation about the suitability of this software
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for any purpose. It is provided "as is" without express or implied warranty.
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OMRON AND DATA GENERAL EACH DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
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SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
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IN NO EVENT SHALL OMRON OR DATA GENERAL BE LIABLE FOR ANY SPECIAL, INDIRECT
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OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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OF THIS SOFTWARE.
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******************************************************************/
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#ifndef MISC_H
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#define MISC_H 1
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/*
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* X internal definitions
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*
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*/
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#include <X11/Xosdefs.h>
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#include <X11/Xfuncproto.h>
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#include <X11/Xmd.h>
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#include <X11/X.h>
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#include <X11/Xdefs.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <pthread.h>
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#ifndef MAXSCREENS
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#define MAXSCREENS 16
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#endif
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#ifndef MAXGPUSCREENS
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#define MAXGPUSCREENS 16
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#endif
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#define MAXCLIENTS 2048
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#define LIMITCLIENTS 256 /* Must be a power of 2 and <= MAXCLIENTS */
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#define MAXEXTENSIONS 128
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#define MAXFORMATS 8
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#ifndef MAXDEVICES
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#define MAXDEVICES 256 /* input devices */
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#endif
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#define GPU_SCREEN_OFFSET 256
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/* 128 event opcodes for core + extension events, excluding GE */
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#define MAXEVENTS 128
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#define EXTENSION_EVENT_BASE 64
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#define EXTENSION_BASE 128
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typedef uint32_t ATOM;
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#ifndef TRUE
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#define TRUE 1
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#define FALSE 0
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#endif
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#ifndef _XTYPEDEF_CALLBACKLISTPTR
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typedef struct _CallbackList *CallbackListPtr; /* also in dix.h */
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#define _XTYPEDEF_CALLBACKLISTPTR
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#endif
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typedef struct _xReq *xReqPtr;
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#include "os.h" /* for ALLOCATE_LOCAL and DEALLOCATE_LOCAL */
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#include <X11/Xfuncs.h> /* for bcopy, bzero, and bcmp */
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#define NullBox ((BoxPtr)0)
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#define MILLI_PER_MIN (1000 * 60)
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#define MILLI_PER_SECOND (1000)
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/* this next is used with None and ParentRelative to tell
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PaintWin() what to use to paint the background. Also used
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in the macro IS_VALID_PIXMAP */
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#define USE_BACKGROUND_PIXEL 3
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#define USE_BORDER_PIXEL 3
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#undef min
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#undef max
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#define min(a, b) (((a) < (b)) ? (a) : (b))
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#define max(a, b) (((a) > (b)) ? (a) : (b))
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/* abs() is a function, not a macro; include the file declaring
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* it in case we haven't done that yet.
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*/
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#include <stdlib.h>
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#define sign(x) ((x) < 0 ? -1 : ((x) > 0 ? 1 : 0))
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/* this assumes b > 0 */
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#define modulus(a, b, d) if (((d) = (a) % (b)) < 0) (d) += (b)
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/*
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* return the least significant bit in x which is set
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*
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* This works on 1's complement and 2's complement machines.
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* If you care about the extra instruction on 2's complement
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* machines, change to ((x) & (-(x)))
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*/
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#define lowbit(x) ((x) & (~(x) + 1))
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/* XXX Not for modules */
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#include <limits.h>
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#if !defined(MAXSHORT) || !defined(MINSHORT) || \
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!defined(MAXINT) || !defined(MININT)
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/*
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* Some implementations #define these through <math.h>, so preclude
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* #include'ing it later.
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*/
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#include <math.h>
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#undef MAXSHORT
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#define MAXSHORT SHRT_MAX
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#undef MINSHORT
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#define MINSHORT SHRT_MIN
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#undef MAXINT
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#define MAXINT INT_MAX
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#undef MININT
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#define MININT INT_MIN
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#include <assert.h>
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#include <ctype.h>
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#include <stdio.h> /* for fopen, etc... */
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#endif
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#ifndef PATH_MAX
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#include <sys/param.h>
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#ifndef PATH_MAX
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#ifdef MAXPATHLEN
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#define PATH_MAX MAXPATHLEN
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#else
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#define PATH_MAX 1024
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#endif
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#endif
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#endif
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/**
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* Calculate the number of bytes needed to hold bits.
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* @param bits The minimum number of bits needed.
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* @return The number of bytes needed to hold bits.
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*/
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static inline int
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bits_to_bytes(const int bits)
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{
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return ((bits + 7) >> 3);
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}
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/**
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* Calculate the number of 4-byte units needed to hold the given number of
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* bytes.
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* @param bytes The minimum number of bytes needed.
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* @return The number of 4-byte units needed to hold bytes.
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*/
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static inline int
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bytes_to_int32(const int bytes)
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{
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return (((bytes) + 3) >> 2);
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}
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/**
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* Calculate the number of bytes (in multiples of 4) needed to hold bytes.
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* @param bytes The minimum number of bytes needed.
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* @return The closest multiple of 4 that is equal or higher than bytes.
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*/
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static inline int
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pad_to_int32(const int bytes)
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{
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return (((bytes) + 3) & ~3);
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}
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/**
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* Calculate padding needed to bring the number of bytes to an even
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* multiple of 4.
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* @param bytes The minimum number of bytes needed.
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* @return The bytes of padding needed to arrive at the closest multiple of 4
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* that is equal or higher than bytes.
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*/
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static inline int
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padding_for_int32(const int bytes)
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{
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return ((-bytes) & 3);
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}
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extern _X_EXPORT char **xstrtokenize(const char *str, const char *separators);
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/**
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* Compare the two version numbers comprising of major.minor.
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*
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* @return A value less than 0 if a is less than b, 0 if a is equal to b,
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* or a value greater than 0
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*/
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static inline int
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version_compare(uint32_t a_major, uint32_t a_minor,
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uint32_t b_major, uint32_t b_minor)
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{
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if (a_major > b_major)
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return 1;
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if (a_major < b_major)
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return -1;
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if (a_minor > b_minor)
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return 1;
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if (a_minor < b_minor)
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return -1;
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return 0;
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}
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/* some macros to help swap requests, replies, and events */
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#define LengthRestB(stuff) \
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((client->req_len << 2) - sizeof(*stuff))
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#define LengthRestS(stuff) \
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((client->req_len << 1) - (sizeof(*stuff) >> 1))
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#define LengthRestL(stuff) \
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(client->req_len - (sizeof(*stuff) >> 2))
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#define SwapRestS(stuff) \
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SwapShorts((short *)(stuff + 1), LengthRestS(stuff))
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#define SwapRestL(stuff) \
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SwapLongs((CARD32 *)(stuff + 1), LengthRestL(stuff))
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#if defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
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void __attribute__ ((error("wrong sized variable passed to swap")))
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wrong_size(void);
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#else
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static inline void
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wrong_size(void)
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{
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}
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#endif
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#if !(defined(__GNUC__))
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static inline int
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__builtin_constant_p(int x)
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{
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return 0;
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}
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#endif
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static inline uint64_t
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bswap_64(uint64_t x)
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{
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return (((x & 0xFF00000000000000ull) >> 56) |
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((x & 0x00FF000000000000ull) >> 40) |
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((x & 0x0000FF0000000000ull) >> 24) |
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((x & 0x000000FF00000000ull) >> 8) |
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((x & 0x00000000FF000000ull) << 8) |
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((x & 0x0000000000FF0000ull) << 24) |
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((x & 0x000000000000FF00ull) << 40) |
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((x & 0x00000000000000FFull) << 56));
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}
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#define swapll(x) do { \
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if (sizeof(*(x)) != 8) \
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wrong_size(); \
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*(x) = bswap_64(*(x)); \
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} while (0)
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static inline uint32_t
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bswap_32(uint32_t x)
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{
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return (((x & 0xFF000000) >> 24) |
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((x & 0x00FF0000) >> 8) |
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((x & 0x0000FF00) << 8) |
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((x & 0x000000FF) << 24));
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}
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static inline Bool
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checked_int64_add(int64_t *out, int64_t a, int64_t b)
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{
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/* Do the potentially overflowing math as uint64_t, as signed
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* integers in C are undefined on overflow (and the compiler may
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* optimize out our overflow check below, otherwise)
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*/
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int64_t result = (uint64_t)a + (uint64_t)b;
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/* signed addition overflows if operands have the same sign, and
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* the sign of the result doesn't match the sign of the inputs.
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*/
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Bool overflow = (a < 0) == (b < 0) && (a < 0) != (result < 0);
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*out = result;
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return overflow;
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}
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static inline Bool
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checked_int64_subtract(int64_t *out, int64_t a, int64_t b)
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{
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int64_t result = (uint64_t)a - (uint64_t)b;
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Bool overflow = (a < 0) != (b < 0) && (a < 0) != (result < 0);
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*out = result;
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return overflow;
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}
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#define swapl(x) do { \
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if (sizeof(*(x)) != 4) \
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wrong_size(); \
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*(x) = bswap_32(*(x)); \
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} while (0)
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static inline uint16_t
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bswap_16(uint16_t x)
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{
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return (((x & 0xFF00) >> 8) |
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((x & 0x00FF) << 8));
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}
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#define swaps(x) do { \
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if (sizeof(*(x)) != 2) \
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wrong_size(); \
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*(x) = bswap_16(*(x)); \
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} while (0)
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/* copy 32-bit value from src to dst byteswapping on the way */
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#define cpswapl(src, dst) do { \
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if (sizeof((src)) != 4 || sizeof((dst)) != 4) \
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wrong_size(); \
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(dst) = bswap_32((src)); \
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} while (0)
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/* copy short from src to dst byteswapping on the way */
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#define cpswaps(src, dst) do { \
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if (sizeof((src)) != 2 || sizeof((dst)) != 2) \
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wrong_size(); \
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(dst) = bswap_16((src)); \
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} while (0)
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extern _X_EXPORT void SwapLongs(CARD32 *list, unsigned long count);
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extern _X_EXPORT void SwapShorts(short *list, unsigned long count);
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extern _X_EXPORT void MakePredeclaredAtoms(void);
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typedef struct _xPoint *DDXPointPtr;
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typedef struct pixman_box16 *BoxPtr;
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typedef struct _xEvent *xEventPtr;
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typedef struct _xRectangle *xRectanglePtr;
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typedef struct _GrabRec *GrabPtr;
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/* typedefs from other places - duplicated here to minimize the amount
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* of unnecessary junk that one would normally have to include to get
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* these symbols defined
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*/
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#ifndef _XTYPEDEF_CHARINFOPTR
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typedef struct _CharInfo *CharInfoPtr; /* also in fonts/include/font.h */
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#define _XTYPEDEF_CHARINFOPTR
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#endif
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extern _X_EXPORT unsigned long globalSerialNumber;
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extern _X_EXPORT unsigned long serverGeneration;
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/* Don't use this directly, use BUG_WARN or BUG_WARN_MSG instead */
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#define __BUG_WARN_MSG(cond, with_msg, ...) \
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do { if (cond) { \
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ErrorF("BUG: triggered 'if (" #cond ")'\n"); \
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ErrorF("BUG: %s:%u in %s()\n", \
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__FILE__, __LINE__, __func__); \
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if (with_msg) ErrorF(__VA_ARGS__); \
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xorg_backtrace(); \
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} } while(0)
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#define BUG_WARN_MSG(cond, ...) \
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__BUG_WARN_MSG(cond, 1, __VA_ARGS__)
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#define BUG_WARN(cond) __BUG_WARN_MSG(cond, 0, NULL)
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#define BUG_RETURN(cond) \
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do { if (cond) { __BUG_WARN_MSG(cond, 0, NULL); return; } } while(0)
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#define BUG_RETURN_MSG(cond, ...) \
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do { if (cond) { __BUG_WARN_MSG(cond, 1, __VA_ARGS__); return; } } while(0)
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#define BUG_RETURN_VAL(cond, val) \
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do { if (cond) { __BUG_WARN_MSG(cond, 0, NULL); return (val); } } while(0)
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#define BUG_RETURN_VAL_MSG(cond, val, ...) \
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do { if (cond) { __BUG_WARN_MSG(cond, 1, __VA_ARGS__); return (val); } } while(0)
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#endif /* MISC_H */
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