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Edit File: Xlibint.h

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#ifndef _X11_XLIBINT_H_
#define _X11_XLIBINT_H_ 1

/*
 *	Xlibint.h - Header definition and support file for the internal
 *	support routines used by the C subroutine interface
 *	library (Xlib) to the X Window System.
 *
 *	Warning, there be dragons here....
 */

#include <stdint.h>
#include <X11/Xlib.h>
#include <X11/Xproto.h>		/* to declare xEvent */
#include <X11/XlibConf.h>	/* for configured options like XTHREADS */

#ifdef XTHREADS
#include <X11/Xthreads.h>
#endif

/* The Xlib structs are full of implicit padding to properly align members.
   We can't clean that up without breaking ABI, so tell clang not to bother
   complaining about it. */
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wpadded"
#endif

#ifdef WIN32
#define _XFlush _XFlushIt
#endif

struct _XGC
{
    XExtData *ext_data;	/* hook for extension to hang data */
    GContext gid;	/* protocol ID for graphics context */
    Bool rects;		/* boolean: TRUE if clipmask is list of rectangles */
    Bool dashes;	/* boolean: TRUE if dash-list is really a list */
    unsigned long dirty;/* cache dirty bits */
    XGCValues values;	/* shadow structure of values */
};

struct _XDisplay
{
	XExtData *ext_data;	/* hook for extension to hang data */
	struct _XFreeFuncs *free_funcs; /* internal free functions */
	int fd;			/* Network socket. */
	int conn_checker;         /* ugly thing used by _XEventsQueued */
	int proto_major_version;/* maj. version of server's X protocol */
	int proto_minor_version;/* minor version of server's X protocol */
	char *vendor;		/* vendor of the server hardware */
        XID resource_base;	/* resource ID base */
	XID resource_mask;	/* resource ID mask bits */
	XID resource_id;	/* allocator current ID */
	int resource_shift;	/* allocator shift to correct bits */
	XID (*resource_alloc)(	/* allocator function */
		struct _XDisplay*
		);
	int byte_order;		/* screen byte order, LSBFirst, MSBFirst */
	int bitmap_unit;	/* padding and data requirements */
	int bitmap_pad;		/* padding requirements on bitmaps */
	int bitmap_bit_order;	/* LeastSignificant or MostSignificant */
	int nformats;		/* number of pixmap formats in list */
	ScreenFormat *pixmap_format;	/* pixmap format list */
	int vnumber;		/* Xlib's X protocol version number. */
	int release;		/* release of the server */
	struct _XSQEvent *head, *tail;	/* Input event queue. */
	int qlen;		/* Length of input event queue */
	unsigned long last_request_read; /* seq number of last event read */
	unsigned long request;	/* sequence number of last request. */
	char *last_req;		/* beginning of last request, or dummy */
	char *buffer;		/* Output buffer starting address. */
	char *bufptr;		/* Output buffer index pointer. */
	char *bufmax;		/* Output buffer maximum+1 address. */
	unsigned max_request_size; /* maximum number 32 bit words in request*/
	struct _XrmHashBucketRec *db;
	int (*synchandler)(	/* Synchronization handler */
		struct _XDisplay*
		);
	char *display_name;	/* "host:display" string used on this connect*/
	int default_screen;	/* default screen for operations */
	int nscreens;		/* number of screens on this server*/
	Screen *screens;	/* pointer to list of screens */
	unsigned long motion_buffer;	/* size of motion buffer */
	volatile unsigned long flags;	   /* internal connection flags */
	int min_keycode;	/* minimum defined keycode */
	int max_keycode;	/* maximum defined keycode */
	KeySym *keysyms;	/* This server's keysyms */
	XModifierKeymap *modifiermap;	/* This server's modifier keymap */
	int keysyms_per_keycode;/* number of rows */
	char *xdefaults;	/* contents of defaults from server */
	char *scratch_buffer;	/* place to hang scratch buffer */
	unsigned long scratch_length;	/* length of scratch buffer */
	int ext_number;		/* extension number on this display */
	struct _XExten *ext_procs; /* extensions initialized on this display */
	/*
	 * the following can be fixed size, as the protocol defines how
	 * much address space is available.
	 * While this could be done using the extension vector, there
	 * may be MANY events processed, so a search through the extension
	 * list to find the right procedure for each event might be
	 * expensive if many extensions are being used.
	 */
	Bool (*event_vec[128])(	/* vector for wire to event */
		Display *	/* dpy */,
		XEvent *	/* re */,
		xEvent *	/* event */
		);
	Status (*wire_vec[128])( /* vector for event to wire */
		Display *	/* dpy */,
		XEvent *	/* re */,
		xEvent *	/* event */
		);
	KeySym lock_meaning;	   /* for XLookupString */
	struct _XLockInfo *lock;   /* multi-thread state, display lock */
	struct _XInternalAsync *async_handlers; /* for internal async */
	unsigned long bigreq_size; /* max size of big requests */
	struct _XLockPtrs *lock_fns; /* pointers to threads functions */
	void (*idlist_alloc)(	   /* XID list allocator function */
		Display *	/* dpy */,
		XID *		/* ids */,
		int		/* count */
		);
	/* things above this line should not move, for binary compatibility */
	struct _XKeytrans *key_bindings; /* for XLookupString */
	Font cursor_font;	   /* for XCreateFontCursor */
	struct _XDisplayAtoms *atoms; /* for XInternAtom */
	unsigned int mode_switch;  /* keyboard group modifiers */
	unsigned int num_lock;  /* keyboard numlock modifiers */
	struct _XContextDB *context_db; /* context database */
	Bool (**error_vec)(	/* vector for wire to error */
		Display     *	/* display */,
		XErrorEvent *	/* he */,
		xError      *	/* we */
		);
	/*
	 * Xcms information
	 */
	struct {
	   XPointer defaultCCCs;  /* pointer to an array of default XcmsCCC */
	   XPointer clientCmaps;  /* pointer to linked list of XcmsCmapRec */
	   XPointer perVisualIntensityMaps;
				  /* linked list of XcmsIntensityMap */
	} cms;
	struct _XIMFilter *im_filters;
	struct _XSQEvent *qfree; /* unallocated event queue elements */
	unsigned long next_event_serial_num; /* inserted into next queue elt */
	struct _XExten *flushes; /* Flush hooks */
	struct _XConnectionInfo *im_fd_info; /* _XRegisterInternalConnection */
	int im_fd_length;	/* number of im_fd_info */
	struct _XConnWatchInfo *conn_watchers; /* XAddConnectionWatch */
	int watcher_count;	/* number of conn_watchers */
	XPointer filedes;	/* struct pollfd cache for _XWaitForReadable */
	int (*savedsynchandler)( /* user synchandler when Xlib usurps */
		Display *	/* dpy */
		);
	XID resource_max;	/* allocator max ID */
	int xcmisc_opcode;	/* major opcode for XC-MISC */
	struct _XkbInfoRec *xkb_info; /* XKB info */
	struct _XtransConnInfo *trans_conn; /* transport connection object */
	struct _X11XCBPrivate *xcb; /* XCB glue private data */

/* Generic event cookie handling */
	unsigned int next_cookie; /* next event cookie */
	/* vector for wire to generic event, index is (extension - 128) */
	Bool (*generic_event_vec[128])(
		Display *	/* dpy */,
		XGenericEventCookie *	/* Xlib event */,
		xEvent *	/* wire event */);
	/* vector for event copy, index is (extension - 128) */
	Bool (*generic_event_copy_vec[128])(
		Display *	/* dpy */,
		XGenericEventCookie *	/* in */,
		XGenericEventCookie *   /* out*/);
	void *cookiejar;  /* cookie events returned but not claimed */
#ifndef LONG64
	unsigned long last_request_read_upper32bit;
	unsigned long request_upper32bit;
#endif

struct _XErrorThreadInfo *error_threads;

XIOErrorExitHandler exit_handler;
	void *exit_handler_data;
	CARD32 in_ifevent;
#ifdef XTHREADS
	xthread_t ifevent_thread;
#endif
};

#define XAllocIDs(dpy,ids,n) (*(dpy)->idlist_alloc)(dpy,ids,n)

/*
 * access "last_request_read" and "request" with 64bit
 * warning: the value argument of the SET-macros must not
 * have any side-effects because it may get called twice.
 */
#ifndef LONG64
/* accessors for 32-bit unsigned long */

#define X_DPY_GET_REQUEST(dpy) \
    ( \
        ((uint64_t)(((struct _XDisplay*)dpy)->request)) \
	+ (((uint64_t)(((struct _XDisplay*)dpy)->request_upper32bit)) << 32) \
    )

#define X_DPY_SET_REQUEST(dpy, value) \
    ( \
        (((struct _XDisplay*)dpy)->request = \
            (value) & 0xFFFFFFFFUL), \
        (((struct _XDisplay*)dpy)->request_upper32bit = \
            ((uint64_t)(value)) >> 32), \
	(void)0 /* don't use the result */ \
    )

#define X_DPY_GET_LAST_REQUEST_READ(dpy) \
    ( \
        ((uint64_t)(((struct _XDisplay*)dpy)->last_request_read)) \
        + ( \
            ((uint64_t)( \
                ((struct _XDisplay*)dpy)->last_request_read_upper32bit \
            )) << 32 \
        ) \
    )

#define X_DPY_SET_LAST_REQUEST_READ(dpy, value) \
    ( \
        (((struct _XDisplay*)dpy)->last_request_read = \
            (value) & 0xFFFFFFFFUL), \
        (((struct _XDisplay*)dpy)->last_request_read_upper32bit = \
            ((uint64_t)(value)) >> 32), \
	(void)0 /* don't use the result */ \
    )

/*
 * widen a 32-bit sequence number to a 64 sequence number.
 * This macro makes the following assumptions:
 * - ulseq refers to a sequence that has already been sent
 * - ulseq means the most recent possible sequence number
 *   with these lower 32 bits.
 *
 * The following optimization is used:
 * The comparison result is taken a 0 or 1 to avoid a branch.
 */
#define X_DPY_WIDEN_UNSIGNED_LONG_SEQ(dpy, ulseq) \
    ( \
        ((uint64_t)ulseq) \
        + \
        (( \
            ((uint64_t)(((struct _XDisplay*)dpy)->request_upper32bit)) \
            - (uint64_t)( \
                (ulseq) > (((struct _XDisplay*)dpy)->request) \
	    ) \
        ) << 32) \
    )

#define X_DPY_REQUEST_INCREMENT(dpy) \
    ( \
        ((struct _XDisplay*)dpy)->request++, \
        ( \
            (((struct _XDisplay*)dpy)->request == 0) ? ( \
                ((struct _XDisplay*)dpy)->request_upper32bit++ \
	    ) : 0 \
        ), \
	(void)0 /* don't use the result */ \
    )

#define X_DPY_REQUEST_DECREMENT(dpy) \
    ( \
	( \
            (((struct _XDisplay*)dpy)->request == 0) ? (\
                ((struct _XDisplay*)dpy)->request--, /* wrap */ \
                ((struct _XDisplay*)dpy)->request_upper32bit-- \
            ) : ( \
                ((struct _XDisplay*)dpy)->request-- \
            ) \
	), \
	(void)0 /* don't use the result */ \
    )

#else
/* accessors for 64-bit unsigned long */
#define X_DPY_GET_REQUEST(dpy) \
    (((struct _XDisplay*)dpy)->request)
#define X_DPY_SET_REQUEST(dpy, value) \
    ((struct _XDisplay*)dpy)->request = (value)

#define X_DPY_GET_LAST_REQUEST_READ(dpy) \
    (((struct _XDisplay*)dpy)->last_request_read)
#define X_DPY_SET_LAST_REQUEST_READ(dpy, value) \
    ((struct _XDisplay*)dpy)->last_request_read = (value)

#define X_DPY_WIDEN_UNSIGNED_LONG_SEQ(dpy, ulseq) ulseq

#define X_DPY_REQUEST_INCREMENT(dpy) ((struct _XDisplay*)dpy)->request++
#define X_DPY_REQUEST_DECREMENT(dpy) ((struct _XDisplay*)dpy)->request--
#endif

#ifndef _XEVENT_
/*
 * _QEvent datatype for use in input queueing.
 */
typedef struct _XSQEvent
{
    struct _XSQEvent *next;
    XEvent event;
    unsigned long qserial_num;	/* so multi-threaded code can find new ones */
} _XQEvent;
#endif

#include <X11/Xproto.h>
#include <errno.h>
#define _XBCOPYFUNC _Xbcopy
#include <X11/Xfuncs.h>
#include <X11/Xosdefs.h>

/* Utek leaves kernel macros around in include files (bleah) */
#ifdef dirty
#undef dirty
#endif

#include <stdlib.h>
#include <string.h>

#include <X11/Xfuncproto.h>

_XFUNCPROTOBEGIN

/*
 * The following definitions can be used for locking requests in multi-threaded
 * address spaces.
 */
#ifdef XTHREADS
/* Author: Stephen Gildea, MIT X Consortium
 *
 * declarations for C Threads locking
 */

typedef struct _LockInfoRec *LockInfoPtr;

/* interfaces for locking.c */
struct _XLockPtrs {
    /* used by all, including extensions; do not move */
    void (*lock_display)(
		Display *dpy
#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
		, char *file
		, int line
#endif
	);
    void (*unlock_display)(
		Display *dpy
#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
		, char *file
		, int line
#endif
	);
};

#if defined(WIN32) && !defined(_XLIBINT_)
#define _XCreateMutex_fn (*_XCreateMutex_fn_p)
#define _XFreeMutex_fn (*_XFreeMutex_fn_p)
#define _XLockMutex_fn (*_XLockMutex_fn_p)
#define _XUnlockMutex_fn (*_XUnlockMutex_fn_p)
#define _Xglobal_lock (*_Xglobal_lock_p)
#endif

/* in XlibInt.c */
extern void (*_XCreateMutex_fn)(
    LockInfoPtr /* lock */
);
extern void (*_XFreeMutex_fn)(
    LockInfoPtr /* lock */
);
extern void (*_XLockMutex_fn)(
    LockInfoPtr	/* lock */
#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
    , char * /* file */
    , int /* line */
#endif
);
extern void (*_XUnlockMutex_fn)(
    LockInfoPtr	/* lock */
#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
    , char * /* file */
    , int /* line */
#endif
);

extern LockInfoPtr _Xglobal_lock;

#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
#define LockDisplay(d)	     if ((d)->lock_fns) (*(d)->lock_fns->lock_display)((d),__FILE__,__LINE__)
#define UnlockDisplay(d)     if ((d)->lock_fns) (*(d)->lock_fns->unlock_display)((d),__FILE__,__LINE__)
#define _XLockMutex(lock)		if (_XLockMutex_fn) (*_XLockMutex_fn)(lock,__FILE__,__LINE__)
#define _XUnlockMutex(lock)	if (_XUnlockMutex_fn) (*_XUnlockMutex_fn)(lock,__FILE__,__LINE__)
#else
/* used everywhere, so must be fast if not using threads */
#define LockDisplay(d)	     if ((d)->lock_fns) (*(d)->lock_fns->lock_display)(d)
#define UnlockDisplay(d)     if ((d)->lock_fns) (*(d)->lock_fns->unlock_display)(d)
#define _XLockMutex(lock)		if (_XLockMutex_fn) (*_XLockMutex_fn)(lock)
#define _XUnlockMutex(lock)	if (_XUnlockMutex_fn) (*_XUnlockMutex_fn)(lock)
#endif
#define _XCreateMutex(lock)	if (_XCreateMutex_fn) (*_XCreateMutex_fn)(lock)
#define _XFreeMutex(lock)	if (_XFreeMutex_fn) (*_XFreeMutex_fn)(lock)

#else /* XTHREADS */
#define LockDisplay(dis)
#define _XLockMutex(lock)
#define _XUnlockMutex(lock)
#define UnlockDisplay(dis)
#define _XCreateMutex(lock)
#define _XFreeMutex(lock)
#endif

#define Xfree(ptr) free((ptr))

/*
 * Note that some machines do not return a valid pointer for malloc(0), in
 * which case we provide an alternate under the control of the
 * define MALLOC_0_RETURNS_NULL.  This is necessary because some
 * Xlib code expects malloc(0) to return a valid pointer to storage.
 */
#if defined(MALLOC_0_RETURNS_NULL) || defined(__clang_analyzer__)

# define Xmalloc(size) malloc((size_t)((size) == 0 ? 1 : (size)))
# define Xrealloc(ptr, size) realloc((ptr), (size_t)((size) == 0 ? 1 : (size)))
# define Xcalloc(nelem, elsize) calloc((size_t)((nelem) == 0 ? 1 : (nelem)), (size_t)(elsize))

#else

# define Xmalloc(size) malloc((size_t)(size))
# define Xrealloc(ptr, size) realloc((ptr), (size_t)(size))
# define Xcalloc(nelem, elsize) calloc((size_t)(nelem), (size_t)(elsize))

#endif

#include <stddef.h>

#define LOCKED 1
#define UNLOCKED 0

#ifndef BUFSIZE
#define BUFSIZE 2048			/* X output buffer size. */
#endif
#ifndef PTSPERBATCH
#define PTSPERBATCH 1024		/* point batching */
#endif
#ifndef WLNSPERBATCH
#define WLNSPERBATCH 50			/* wide line batching */
#endif
#ifndef ZLNSPERBATCH
#define ZLNSPERBATCH 1024		/* thin line batching */
#endif
#ifndef WRCTSPERBATCH
#define WRCTSPERBATCH 10		/* wide line rectangle batching */
#endif
#ifndef ZRCTSPERBATCH
#define ZRCTSPERBATCH 256		/* thin line rectangle batching */
#endif
#ifndef FRCTSPERBATCH
#define FRCTSPERBATCH 256		/* filled rectangle batching */
#endif
#ifndef FARCSPERBATCH
#define FARCSPERBATCH 256		/* filled arc batching */
#endif
#ifndef CURSORFONT
#define CURSORFONT "cursor"		/* standard cursor fonts */
#endif

/*
 * Display flags
 */
#define XlibDisplayIOError	(1L << 0)
#define XlibDisplayClosing	(1L << 1)
#define XlibDisplayNoXkb	(1L << 2)
#define XlibDisplayPrivSync	(1L << 3)
#define XlibDisplayProcConni	(1L << 4) /* in _XProcessInternalConnection */
#define XlibDisplayReadEvents	(1L << 5) /* in _XReadEvents */
#define XlibDisplayReply	(1L << 5) /* in _XReply */
#define XlibDisplayWriting	(1L << 6) /* in _XFlushInt, _XSend */
#define XlibDisplayDfltRMDB     (1L << 7) /* mark if RM db from XGetDefault */

/*
 * X Protocol packetizing macros.
 */

/* Leftover from CRAY support - was defined empty on all non-Cray systems */
#define WORD64ALIGN

/**
 * Return a len-sized request buffer for the request type. This function may
 * flush the output queue.
 *
 * @param dpy The display connection
 * @param type The request type
 * @param len Length of the request in bytes
 *
 * @returns A pointer to the request buffer with a few default values
 * initialized.
 */
extern void *_XGetRequest(Display *dpy, CARD8 type, size_t len);

/* GetReqSized is the same as GetReq but allows the caller to specify the
 * size in bytes. 'sz' must be a multiple of 4! */

#define GetReqSized(name, sz, req) \
	req = (x##name##Req *) _XGetRequest(dpy, X_##name, sz)

/*
 * GetReq - Get the next available X request packet in the buffer and
 * return it.
 *
 * "name" is the name of the request, e.g. CreatePixmap, OpenFont, etc.
 * "req" is the name of the request pointer.
 *
 */

#define GetReq(name, req) \
	GetReqSized(name, SIZEOF(x##name##Req), req)

/* GetReqExtra is the same as GetReq, but allocates "n" additional
   bytes after the request. "n" must be a multiple of 4!  */

#define GetReqExtra(name, n, req) \
        GetReqSized(name, SIZEOF(x##name##Req) + n, req)

/*
 * GetResReq is for those requests that have a resource ID
 * (Window, Pixmap, GContext, etc.) as their single argument.
 * "rid" is the name of the resource.
 */

#define GetResReq(name, rid, req) \
	req = (xResourceReq *) _XGetRequest(dpy, X_##name, SIZEOF(xResourceReq)); \
	if (req) req->id = (rid)

/*
 * GetEmptyReq is for those requests that have no arguments
 * at all.
 */

#define GetEmptyReq(name, req) \
	req = (xReq *) _XGetRequest(dpy, X_##name, SIZEOF(xReq))

/*
 * MakeBigReq sets the CARD16 "req->length" to 0 and inserts a new CARD32
 * length, after req->length, before the data in the request.  The new length
 * includes the "n" extra 32-bit words.
 *
 * Do not use MakeBigReq if there is no data already in the request.
 * req->length must already be >= 2.
 */
#ifdef LONG64
#define MakeBigReq(req,n) \
    { \
    CARD64 _BRdat; \
    CARD32 _BRlen = (CARD32) (req->length - 1); \
    req->length = 0; \
    _BRdat = ((CARD32 *)req)[_BRlen]; \
    memmove(((char *)req) + 8, ((char *)req) + 4, (_BRlen - 1) << 2); \
    ((CARD32 *)req)[1] = _BRlen + (CARD32) (n) + 2; \
    Data32(dpy, &_BRdat, 4); \
    }
#else
#define MakeBigReq(req,n) \
    { \
    CARD32 _BRdat; \
    CARD32 _BRlen = req->length - 1; \
    req->length = 0; \
    _BRdat = ((CARD32 *)req)[_BRlen]; \
    memmove(((char *)req) + 8, ((char *)req) + 4, (_BRlen - 1) << 2); \
    ((CARD32 *)req)[1] = _BRlen + (CARD32) (n) + 2; \
    Data32(dpy, &_BRdat, 4); \
    }
#endif

/*
 * SetReqLen increases the count of 32-bit words in the request by "n",
 * or by "badlen" if "n" is too large.
 *
 * Do not use SetReqLen if "req" does not already have data after the
 * xReq header.  req->length must already be >= 2.
 */
#ifndef __clang_analyzer__
#define SetReqLen(req,n,badlen) \
    if ((req->length + n) > (unsigned)65535) { \
	if (dpy->bigreq_size) { \
	    MakeBigReq(req,n) \
	} else { \
	    n = badlen; \
	    req->length = (CARD16) (req->length + n); \
	} \
    } else \
	req->length = (CARD16) (req->length + n)
#else
#define SetReqLen(req,n,badlen) \
    req->length += n
#endif

#define SyncHandle() \
	if (dpy->synchandler) (*dpy->synchandler)(dpy)

extern void _XFlushGCCache(Display *dpy, GC gc);
#define FlushGC(dpy, gc) \
	if ((gc)->dirty) _XFlushGCCache((dpy), (gc))
/*
 * Data - Place data in the buffer and pad the end to provide
 * 32 bit word alignment.  Transmit if the buffer fills.
 *
 * "dpy" is a pointer to a Display.
 * "data" is a pointer to a data buffer.
 * "len" is the length of the data buffer.
 */
#ifndef DataRoutineIsProcedure
#define Data(dpy, data, len) do {\
	if (dpy->bufptr + (len) <= dpy->bufmax) {\
		memcpy(dpy->bufptr, data, (size_t)(len));\
		dpy->bufptr += ((size_t)((len) + 3) & (size_t)~3);\
	} else\
		_XSend(dpy, (_Xconst char*)(data), (long)(len));\
} while (0)
#endif /* DataRoutineIsProcedure */

/* Allocate bytes from the buffer.  No padding is done, so if
 * the length is not a multiple of 4, the caller must be
 * careful to leave the buffer aligned after sending the
 * current request.
 *
 * "type" is the type of the pointer being assigned to.
 * "ptr" is the pointer being assigned to.
 * "n" is the number of bytes to allocate.
 *
 * Example:
 *    xTextElt *elt;
 *    BufAlloc (xTextElt *, elt, nbytes)
 */

#define BufAlloc(type, ptr, n) do {      \
    if (dpy->bufptr + (n) > dpy->bufmax) \
        _XFlush (dpy); \
    ptr = (type) dpy->bufptr; \
    memset(ptr, '\0', (size_t)(n)); \
    dpy->bufptr += (n); \
} while (0)

#define Data16(dpy, data, len) Data((dpy), (_Xconst char *)(data), (len))
#define _XRead16Pad(dpy, data, len) _XReadPad((dpy), (char *)(data), (len))
#define _XRead16(dpy, data, len) _XRead((dpy), (char *)(data), (len))
#ifdef LONG64
#define Data32(dpy, data, len) _XData32(dpy, (_Xconst long *)(data), (unsigned)(len))
extern int _XData32(
	     Display *dpy,
	     _Xconst long *data,
	     unsigned len
);
extern void _XRead32(
	     Display *dpy,
	     long *data,
	     long len
);
#else
#define Data32(dpy, data, len) Data((dpy), (_Xconst char *)(data), (long)(len))
#define _XRead32(dpy, data, len) _XRead((dpy), (char *)(data), (len))
#endif

#define PackData16(dpy,data,len) Data16 (dpy, data, len)
#define PackData32(dpy,data,len) Data32 (dpy, data, len)

/* Xlib manual is bogus */
#define PackData(dpy,data,len) PackData16 (dpy, data, len)

#define min(a,b) (((a) < (b)) ? (a) : (b))
#define max(a,b) (((a) > (b)) ? (a) : (b))

#define CI_NONEXISTCHAR(cs) (((cs)->width == 0) && \
			     (((cs)->rbearing|(cs)->lbearing| \
			       (cs)->ascent|(cs)->descent) == 0))

/*
 * CI_GET_CHAR_INFO_1D - return the charinfo struct for the indicated 8bit
 * character.  If the character is in the column and exists, then return the
 * appropriate metrics (note that fonts with common per-character metrics will
 * return min_bounds).  If none of these hold true, try again with the default
 * char.
 */
#define CI_GET_CHAR_INFO_1D(fs,col,def,cs) \
do { \
    cs = def; \
    if (col >= fs->min_char_or_byte2 && col <= fs->max_char_or_byte2) { \
	if (fs->per_char == NULL) { \
	    cs = &fs->min_bounds; \
	} else { \
	    cs = &fs->per_char[(col - fs->min_char_or_byte2)]; \
	    if (CI_NONEXISTCHAR(cs)) cs = def; \
	} \
    } \
} while (0)

#define CI_GET_DEFAULT_INFO_1D(fs,cs) \
  CI_GET_CHAR_INFO_1D (fs, fs->default_char, NULL, cs)

/*
 * CI_GET_CHAR_INFO_2D - return the charinfo struct for the indicated row and
 * column.  This is used for fonts that have more than row zero.
 */
#define CI_GET_CHAR_INFO_2D(fs,row,col,def,cs) \
do { \
    cs = def; \
    if (row >= fs->min_byte1 && row <= fs->max_byte1 && \
	col >= fs->min_char_or_byte2 && col <= fs->max_char_or_byte2) { \
	if (fs->per_char == NULL) { \
	    cs = &fs->min_bounds; \
	} else { \
	    cs = &fs->per_char[((row - fs->min_byte1) * \
			        (fs->max_char_or_byte2 - \
				 fs->min_char_or_byte2 + 1)) + \
			       (col - fs->min_char_or_byte2)]; \
	    if (CI_NONEXISTCHAR(cs)) cs = def; \
        } \
    } \
} while (0)

#define CI_GET_DEFAULT_INFO_2D(fs,cs) \
do { \
    unsigned int r = (fs->default_char >> 8); \
    unsigned int c = (fs->default_char & 0xff); \
    CI_GET_CHAR_INFO_2D (fs, r, c, NULL, cs); \
} while (0)

/* srcvar must be a variable for large architecture version */
#define OneDataCard32(dpy,dstaddr,srcvar) \
    do { *(CARD32 *)(dstaddr) = (srcvar); } while (0)

typedef struct _XInternalAsync {
    struct _XInternalAsync *next;
    /*
     * handler arguments:
     * rep is the generic reply that caused this handler
     * to be invoked.  It must also be passed to _XGetAsyncReply.
     * buf and len are opaque values that must be passed to
     * _XGetAsyncReply or _XGetAsyncData.
     * data is the closure stored in this struct.
     * The handler returns True iff it handled this reply.
     */
    Bool (*handler)(
		    Display*	/* dpy */,
		    xReply*	/* rep */,
		    char*	/* buf */,
		    int		/* len */,
		    XPointer	/* data */
		    );
    XPointer data;
} _XAsyncHandler;

/*
 * This struct is part of the ABI and is defined by value
 * in user-code. This means that we cannot make
 * the sequence-numbers 64bit.
 */
typedef struct _XAsyncEState {
    unsigned long min_sequence_number;
    unsigned long max_sequence_number;
    unsigned char error_code;
    unsigned char major_opcode;
    unsigned short minor_opcode;
    unsigned char last_error_received;
    int error_count;
} _XAsyncErrorState;

extern void _XDeqAsyncHandler(Display *dpy, _XAsyncHandler *handler);
#define DeqAsyncHandler(dpy,handler) do { \
    if (dpy->async_handlers == (handler)) \
	dpy->async_handlers = (handler)->next; \
    else \
	_XDeqAsyncHandler(dpy, handler); \
    } while (0)

typedef void (*FreeFuncType) (
    Display*	/* display */
);

typedef int (*FreeModmapType) (
    XModifierKeymap*	/* modmap */
);

/*
 * This structure is private to the library.
 */
typedef struct _XFreeFuncs {
    FreeFuncType atoms;		/* _XFreeAtomTable */
    FreeModmapType modifiermap;	/* XFreeModifiermap */
    FreeFuncType key_bindings;	/* _XFreeKeyBindings */
    FreeFuncType context_db;	/* _XFreeContextDB */
    FreeFuncType defaultCCCs;	/* _XcmsFreeDefaultCCCs */
    FreeFuncType clientCmaps;	/* _XcmsFreeClientCmaps */
    FreeFuncType intensityMaps;	/* _XcmsFreeIntensityMaps */
    FreeFuncType im_filters;	/* _XFreeIMFilters */
    FreeFuncType xkb;		/* _XkbFreeInfo */
} _XFreeFuncRec;

/* types for InitExt.c */
typedef int (*CreateGCType) (
    Display*	/* display */,
    GC		/* gc */,
    XExtCodes*	/* codes */
);

typedef int (*CopyGCType)(
    Display*	/* display */,
    GC		/* gc */,
    XExtCodes*	/* codes */
);

typedef int (*FlushGCType) (
    Display*	/* display */,
    GC		/* gc */,
    XExtCodes*	/* codes */
);

typedef int (*FreeGCType) (
    Display*	/* display */,
    GC		/* gc */,
    XExtCodes*	/* codes */
);

typedef int (*CreateFontType) (
    Display*	/* display */,
    XFontStruct* /* fs */,
    XExtCodes*	/* codes */
);

typedef int (*FreeFontType) (
    Display*	/* display */,
    XFontStruct* /* fs */,
    XExtCodes*	/* codes */
);

typedef int (*CloseDisplayType) (
    Display*	/* display */,
    XExtCodes*	/* codes */
);

typedef int (*ErrorType) (
    Display*	/* display */,
    xError*	/* err */,
    XExtCodes*	/* codes */,
    int*	/* ret_code */
);

typedef char* (*ErrorStringType) (
    Display*	/* display */,
    int		/* code */,
    XExtCodes*	/* codes */,
    char*	/* buffer */,
    int		/* nbytes */
);

typedef void (*PrintErrorType)(
    Display*	/* display */,
    XErrorEvent* /* ev */,
    void*	/* fp */
);

typedef void (*BeforeFlushType)(
    Display*	/* display */,
    XExtCodes*	/* codes */,
    _Xconst char* /* data */,
    long	/* len */
);

/*
 * This structure is private to the library.
 */
typedef struct _XExten {		/* private to extension mechanism */
	struct _XExten *next;		/* next in list */
	XExtCodes codes;		/* public information, all extension told */
	CreateGCType create_GC;		/* routine to call when GC created */
	CopyGCType copy_GC;		/* routine to call when GC copied */
	FlushGCType flush_GC;		/* routine to call when GC flushed */
	FreeGCType free_GC;		/* routine to call when GC freed */
	CreateFontType create_Font;	/* routine to call when Font created */
	FreeFontType free_Font;		/* routine to call when Font freed */
	CloseDisplayType close_display;	/* routine to call when connection closed */
	ErrorType error;		/* who to call when an error occurs */
	ErrorStringType error_string;	/* routine to supply error string */
	char *name;			/* name of this extension */
	PrintErrorType error_values;	/* routine to supply error values */
	BeforeFlushType before_flush;	/* routine to call when sending data */
	struct _XExten *next_flush;	/* next in list of those with flushes */
} _XExtension;

/* extension hooks */

#ifdef DataRoutineIsProcedure
extern void Data(Display *dpy, char *data, long len);
#endif
extern int _XError(
    Display*	/* dpy */,
    xError*	/* rep */
);
extern int _XIOError(
    Display*	/* dpy */
);
extern int (*_XIOErrorFunction)(
    Display*	/* dpy */
);
extern int (*_XErrorFunction)(
    Display*		/* dpy */,
    XErrorEvent*	/* error_event */
);
extern void _XEatData(
    Display*		/* dpy */,
    unsigned long	/* n */
) _X_COLD;
extern void _XEatDataWords(
    Display*		/* dpy */,
    unsigned long	/* n */
) _X_COLD;
#if defined(__SUNPRO_C) /* Studio compiler alternative to "cold" attribute */
# pragma rarely_called(_XEatData, _XEatDataWords)
#endif
extern char *_XAllocScratch(
    Display*		/* dpy */,
    unsigned long	/* nbytes */
);
extern char *_XAllocTemp(
    Display*		/* dpy */,
    unsigned long	/* nbytes */
);
extern void _XFreeTemp(
    Display*		/* dpy */,
    char*		/* buf */,
    unsigned long	/* nbytes */
);
extern Visual *_XVIDtoVisual(
    Display*	/* dpy */,
    VisualID	/* id */
);
extern unsigned long _XSetLastRequestRead(
    Display*		/* dpy */,
    xGenericReply*	/* rep */
);
extern int _XGetHostname(
    char*	/* buf */,
    int		/* maxlen */
);
extern Screen *_XScreenOfWindow(
    Display*	/* dpy */,
    Window	/* w */
);
extern Bool _XAsyncErrorHandler(
    Display*	/* dpy */,
    xReply*	/* rep */,
    char*	/* buf */,
    int		/* len */,
    XPointer	/* data */
);
extern char *_XGetAsyncReply(
    Display*	/* dpy */,
    char*	/* replbuf */,
    xReply*	/* rep */,
    char*	/* buf */,
    int		/* len */,
    int		/* extra */,
    Bool	/* discard */
);
extern void _XGetAsyncData(
    Display*	/* dpy */,
    char *	/* data */,
    char *	/* buf */,
    int		/* len */,
    int		/* skip */,
    int		/* datalen */,
    int		/* discardtotal */
);
extern void _XFlush(
    Display*	/* dpy */
);
extern int _XEventsQueued(
    Display*	/* dpy */,
    int 	/* mode */
);
extern void _XReadEvents(
    Display*	/* dpy */
);
extern int _XRead(
    Display*	/* dpy */,
    char*	/* data */,
    long	/* size */
);
extern void _XReadPad(
    Display*	/* dpy */,
    char*	/* data */,
    long	/* size */
);
extern void _XSend(
    Display*		/* dpy */,
    _Xconst char*	/* data */,
    long		/* size */
);
extern Status _XReply(
    Display*	/* dpy */,
    xReply*	/* rep */,
    int		/* extra */,
    Bool	/* discard */
);
extern void _XEnq(
    Display*	/* dpy */,
    xEvent*	/* event */
);
extern void _XDeq(
    Display*	/* dpy */,
    _XQEvent*	/* prev */,
    _XQEvent*	/* qelt */
);

extern Bool _XUnknownWireEvent(
    Display*	/* dpy */,
    XEvent*	/* re */,
    xEvent*	/* event */
);

extern Bool _XUnknownWireEventCookie(
    Display*	/* dpy */,
    XGenericEventCookie*	/* re */,
    xEvent*	/* event */
);

extern Bool _XUnknownCopyEventCookie(
    Display*	/* dpy */,
    XGenericEventCookie*	/* in */,
    XGenericEventCookie*	/* out */
);

extern Status _XUnknownNativeEvent(
    Display*	/* dpy */,
    XEvent*	/* re */,
    xEvent*	/* event */
);

extern Bool _XWireToEvent(Display *dpy, XEvent *re, xEvent *event);
extern Bool _XDefaultWireError(Display *display, XErrorEvent *he, xError *we);
extern Bool _XPollfdCacheInit(Display *dpy);
extern void _XPollfdCacheAdd(Display *dpy, int fd);
extern void _XPollfdCacheDel(Display *dpy, int fd);
extern XID _XAllocID(Display *dpy);
extern void _XAllocIDs(Display *dpy, XID *ids, int count);

extern int _XFreeExtData(
    XExtData*	/* extension */
);

extern int (*XESetCreateGC(
    Display*		/* display */,
    int			/* extension */,
    int (*) (
	      Display*			/* display */,
	      GC			/* gc */,
	      XExtCodes*		/* codes */
	    )		/* proc */
))(
    Display*, GC, XExtCodes*
);

extern int (*XESetCopyGC(
    Display*		/* display */,
    int			/* extension */,
    int (*) (
	      Display*			/* display */,
              GC			/* gc */,
              XExtCodes*		/* codes */
            )		/* proc */
))(
    Display*, GC, XExtCodes*
);

extern int (*XESetFlushGC(
    Display*		/* display */,
    int			/* extension */,
    int (*) (
	      Display*			/* display */,
              GC			/* gc */,
              XExtCodes*		/* codes */
            )		/* proc */
))(
    Display*, GC, XExtCodes*
);

extern int (*XESetFreeGC(
    Display*		/* display */,
    int			/* extension */,
    int (*) (
	      Display*			/* display */,
              GC			/* gc */,
              XExtCodes*		/* codes */
            )		/* proc */
))(
    Display*, GC, XExtCodes*
);

extern int (*XESetCreateFont(
    Display*		/* display */,
    int			/* extension */,
    int (*) (
	      Display*			/* display */,
              XFontStruct*		/* fs */,
              XExtCodes*		/* codes */
            )		/* proc */
))(
    Display*, XFontStruct*, XExtCodes*
);

extern int (*XESetFreeFont(
    Display*		/* display */,
    int			/* extension */,
    int (*) (
	      Display*			/* display */,
              XFontStruct*		/* fs */,
              XExtCodes*		/* codes */
            )		/* proc */
))(
    Display*, XFontStruct*, XExtCodes*
);

extern int (*XESetCloseDisplay(
    Display*		/* display */,
    int			/* extension */,
    int (*) (
	      Display*			/* display */,
              XExtCodes*		/* codes */
            )		/* proc */
))(
    Display*, XExtCodes*
);

extern int (*XESetError(
    Display*		/* display */,
    int			/* extension */,
    int (*) (
	      Display*			/* display */,
              xError*			/* err */,
              XExtCodes*		/* codes */,
              int*			/* ret_code */
            )		/* proc */
))(
    Display*, xError*, XExtCodes*, int*
);

extern char* (*XESetErrorString(
    Display*		/* display */,
    int			/* extension */,
    char* (*) (
	        Display*		/* display */,
                int			/* code */,
                XExtCodes*		/* codes */,
                char*			/* buffer */,
                int			/* nbytes */
              )		/* proc */
))(
    Display*, int, XExtCodes*, char*, int
);

extern void (*XESetPrintErrorValues (
    Display*		/* display */,
    int			/* extension */,
    void (*)(
	      Display*			/* display */,
	      XErrorEvent*		/* ev */,
	      void*			/* fp */
	     )		/* proc */
))(
    Display*, XErrorEvent*, void*
);

extern Bool (*XESetWireToEvent(
    Display*		/* display */,
    int			/* event_number */,
    Bool (*) (
	       Display*			/* display */,
               XEvent*			/* re */,
               xEvent*			/* event */
             )		/* proc */
))(
    Display*, XEvent*, xEvent*
);

extern Bool (*XESetWireToEventCookie(
    Display*		/* display */,
    int			/* extension */,
    Bool (*) (
	       Display*			/* display */,
               XGenericEventCookie*	/* re */,
               xEvent*			/* event */
             )		/* proc */
))(
    Display*, XGenericEventCookie*, xEvent*
);

extern Bool (*XESetCopyEventCookie(
    Display*		/* display */,
    int			/* extension */,
    Bool (*) (
	       Display*			/* display */,
               XGenericEventCookie*	/* in */,
               XGenericEventCookie*	/* out */
             )		/* proc */
))(
    Display*, XGenericEventCookie*, XGenericEventCookie*
);

extern Status (*XESetEventToWire(
    Display*		/* display */,
    int			/* event_number */,
    Status (*) (
	      Display*			/* display */,
              XEvent*			/* re */,
              xEvent*			/* event */
            )		/* proc */
))(
    Display*, XEvent*, xEvent*
);

extern Bool (*XESetWireToError(
    Display*		/* display */,
    int			/* error_number */,
    Bool (*) (
	       Display*			/* display */,
	       XErrorEvent*		/* he */,
	       xError*			/* we */
            )		/* proc */
))(
    Display*, XErrorEvent*, xError*
);

extern void (*XESetBeforeFlush(
    Display*		/* display */,
    int			/* error_number */,
    void (*) (
	       Display*			/* display */,
	       XExtCodes*		/* codes */,
	       _Xconst char*		/* data */,
	       long			/* len */
            )		/* proc */
))(
    Display*, XExtCodes*, _Xconst char*, long
);

/* internal connections for IMs */

typedef void (*_XInternalConnectionProc)(
    Display*			/* dpy */,
    int				/* fd */,
    XPointer			/* call_data */
);

extern Status _XRegisterInternalConnection(
    Display*			/* dpy */,
    int				/* fd */,
    _XInternalConnectionProc	/* callback */,
    XPointer			/* call_data */
);

extern void _XUnregisterInternalConnection(
    Display*			/* dpy */,
    int				/* fd */
);

extern void _XProcessInternalConnection(
    Display*			/* dpy */,
    struct _XConnectionInfo*	/* conn_info */
);

/* Display structure has pointers to these */

struct _XConnectionInfo {	/* info from _XRegisterInternalConnection */
    int fd;
    _XInternalConnectionProc read_callback;
    XPointer call_data;
    XPointer *watch_data;	/* set/used by XConnectionWatchProc */
    struct _XConnectionInfo *next;
};

struct _XConnWatchInfo {	/* info from XAddConnectionWatch */
    XConnectionWatchProc fn;
    XPointer client_data;
    struct _XConnWatchInfo *next;
};

extern int _XTextHeight(
    XFontStruct*	/* font_struct */,
    _Xconst char*	/* string */,
    int			/* count */
);

extern int _XTextHeight16(
    XFontStruct*	/* font_struct */,
    _Xconst XChar2b*	/* string */,
    int			/* count */
);

#if defined(WIN32)

extern int _XOpenFile(
    _Xconst char*	/* path */,
    int			/* flags */
);

extern int _XOpenFileMode(
    _Xconst char*	/* path */,
    int			/* flags */,
    mode_t              /* mode */
);

extern void* _XFopenFile(
    _Xconst char*	/* path */,
    _Xconst char*	/* mode */
);

extern int _XAccessFile(
    _Xconst char*	/* path */
);
#else
#define _XOpenFile(path,flags) open(path,flags)
#define _XOpenFileMode(path,flags,mode) open(path,flags,mode)
#define _XFopenFile(path,mode) fopen(path,mode)
#endif

/* EvToWire.c */
extern Status _XEventToWire(Display *dpy, XEvent *re, xEvent *event);

extern int _XF86LoadQueryLocaleFont(
    Display*		/* dpy */,
    _Xconst char*	/* name*/,
    XFontStruct**	/* xfp*/,
    Font*		/* fidp */
);

extern void _XProcessWindowAttributes (
    Display *dpy,
    xChangeWindowAttributesReq *req,
    unsigned long valuemask,
    XSetWindowAttributes *attributes);

extern int _XDefaultError(
        Display *dpy,
        XErrorEvent *event);

extern int _XDefaultIOError(
        Display *dpy);

extern void _XDefaultIOErrorExit(
    Display *dpy,
    void *user_data);

extern void _XSetClipRectangles (
    Display *dpy,
    GC gc,
    int clip_x_origin, int clip_y_origin,
    XRectangle *rectangles,
    int n,
    int ordering);

Status _XGetWindowAttributes(
    Display *dpy,
    Window w,
    XWindowAttributes *attr);

int _XPutBackEvent (
    Display *dpy,
    XEvent *event);

extern Bool _XIsEventCookie(
        Display *dpy,
        XEvent *ev);

extern void _XFreeEventCookies(
        Display *dpy);

extern void _XStoreEventCookie(
        Display *dpy,
        XEvent *ev);

extern Bool _XFetchEventCookie(
        Display *dpy,
        XGenericEventCookie *ev);

extern Bool _XCopyEventCookie(
        Display *dpy,
        XGenericEventCookie *in,
        XGenericEventCookie *out);

/* lcFile.c */

extern void xlocaledir(
    char *buf,
    int buf_len
);

#ifdef __clang__
#pragma clang diagnostic pop
#endif

_XFUNCPROTOEND

#endif /* _X11_XLIBINT_H_ */