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/* $XFree86: xc/lib/Xi/XIint.h,v 3.2 2003/07/07 15:34:22 eich Exp $ */
/*
* XIint.h - Header definition and support file for the internal
* support routines used by the Xi library.
*/
#ifndef _XIINT_H_
#define _XIINT_H_
#include <X11/extensions/XI.h>
extern XExtDisplayInfo *XInput_find_display(Display *);
extern int _XiCheckExtInit(Display *, int, XExtDisplayInfo *);
extern XExtensionVersion *_XiGetExtensionVersion(Display *, _Xconst char *, XExtDisplayInfo *);
extern XExtensionVersion* _XiGetExtensionVersionRequest(Display *dpy, _Xconst char *name, int xi_opcode);
extern Status _xiQueryVersion(Display *dpy, int*, int*, XExtDisplayInfo *);
extern Status _XiEventToWire(
register Display * /* dpy */,
register XEvent * /* re */,
register xEvent ** /* event */,
register int * /* count */
);
typedef struct _XInputData
{
XEvent data;
XExtensionVersion *vers;
} XInputData;
/**
* Returns the next valid memory block of the given size within the block
* previously allocated.
* Use letting pointers inside a struct point to bytes after the same
* struct, e.g. during protocol parsing etc.
*
* Caller is responsible for allocating enough memory.
*
* Example:
* void *ptr;
* struct foo {
* int num_a;
* int num_b;
* int *a;
* int *b;
* } bar;
*
* ptr = malloc(large_enough);
* bar = next_block(&ptr, sizeof(struct foo));
* bar->num_a = 10;
* bar->num_b = 20;
* bar->a = next_block(&ptr, bar->num_a);
* bar->b = next_block(&ptr, bar->num_b);
*/
static inline void*
next_block(void **ptr, int size) {
void *ret = *ptr;
if (!*ptr)
return NULL;
*(unsigned char**)ptr += size;
return ret;
}
#endif
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