diff options
Diffstat (limited to 'libXext/src/Xge.c')
| -rw-r--r-- | libXext/src/Xge.c | 730 |
1 files changed, 365 insertions, 365 deletions
diff --git a/libXext/src/Xge.c b/libXext/src/Xge.c index 724011eab..d28a4f052 100644 --- a/libXext/src/Xge.c +++ b/libXext/src/Xge.c @@ -1,365 +1,365 @@ -/*
- * Copyright © 2007-2008 Peter Hutterer
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * Authors: Peter Hutterer, University of South Australia, NICTA
- */
-
-/*
- * XGE is an extension to re-use a single opcode for multiple events,
- * depending on the extension. XGE allows events >32 bytes.
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <stdio.h>
-#include <X11/extensions/geproto.h>
-#include <X11/extensions/ge.h>
-#include <X11/Xlibint.h>
-#include <X11/extensions/extutil.h>
-#include <X11/extensions/Xge.h>
-
-/***********************************************************************/
-/* internal data structures */
-/***********************************************************************/
-
-typedef struct {
- int present;
- short major_version;
- short minor_version;
-} XGEVersionRec;
-
-/* NULL terminated list of registered extensions. */
-typedef struct _XGEExtNode {
- int extension;
- XExtensionHooks* hooks;
- struct _XGEExtNode* next;
-} XGEExtNode, *XGEExtList;
-
-/* Internal data for GE extension */
-typedef struct _XGEData {
- XEvent data;
- XGEVersionRec *vers;
- XGEExtList extensions;
-} XGEData;
-
-
-/* forward declarations */
-static XExtDisplayInfo* _xgeFindDisplay(Display*);
-static Bool _xgeWireToEvent(Display*, XEvent*, xEvent*);
-static Status _xgeEventToWire(Display*, XEvent*, xEvent*);
-static int _xgeDpyClose(Display*, XExtCodes*);
-static XGEVersionRec* _xgeGetExtensionVersion(Display*,
- _Xconst char*,
- XExtDisplayInfo*);
-static Bool _xgeCheckExtension(Display* dpy, XExtDisplayInfo* info);
-
-/* main extension information data */
-static XExtensionInfo *xge_info;
-static char xge_extension_name[] = GE_NAME;
-static XExtensionHooks xge_extension_hooks = {
- NULL, /* create_gc */
- NULL, /* copy_gc */
- NULL, /* flush_gc */
- NULL, /* free_gc */
- NULL, /* create_font */
- NULL, /* free_font */
- _xgeDpyClose, /* close_display */
- _xgeWireToEvent, /* wire_to_event */
- _xgeEventToWire, /* event_to_wire */
- NULL, /* error */
- NULL, /* error_string */
-};
-
-
-static XExtDisplayInfo *_xgeFindDisplay(Display *dpy)
-{
- XExtDisplayInfo *dpyinfo;
- if (!xge_info)
- {
- if (!(xge_info = XextCreateExtension()))
- return NULL;
- }
- if (!(dpyinfo = XextFindDisplay (xge_info, dpy)))
- {
- dpyinfo = XextAddDisplay (xge_info,
- dpy,
- xge_extension_name,
- &xge_extension_hooks,
- 0 /* no events, see below */,
- NULL);
- /* We don't use an extension opcode, so we have to set the handlers
- * directly. If GenericEvent would be > 64, the job would be done by
- * XExtAddDisplay */
- XESetWireToEvent (dpy,
- GenericEvent,
- xge_extension_hooks.wire_to_event);
- XESetEventToWire (dpy,
- GenericEvent,
- xge_extension_hooks.event_to_wire);
- }
- return dpyinfo;
-}
-
-/*
- * Check extension is set up and internal data fields are filled.
- */
-static Bool
-_xgeCheckExtInit(Display* dpy, XExtDisplayInfo* info)
-{
- LockDisplay(dpy);
- if(!_xgeCheckExtension(dpy, info))
- {
- goto cleanup;
- }
-
- if (!info->data)
- {
- XGEData* data = (XGEData*)Xmalloc(sizeof(XGEData));
- if (!data) {
- goto cleanup;
- }
- /* get version from server */
- data->vers =
- _xgeGetExtensionVersion(dpy, "Generic Event Extension", info);
- data->extensions = NULL;
- info->data = (XPointer)data;
- }
-
- UnlockDisplay(dpy);
- return True;
-
-cleanup:
- UnlockDisplay(dpy);
- return False;
-}
-
-/* Return 1 if XGE extension exists, 0 otherwise. */
-static Bool
-_xgeCheckExtension(Display* dpy, XExtDisplayInfo* info)
-{
- return XextHasExtension(info);
-}
-
-
-/* Retrieve XGE version number from server. */
-static XGEVersionRec*
-_xgeGetExtensionVersion(Display* dpy,
- _Xconst char* name,
- XExtDisplayInfo*info)
-{
- xGEQueryVersionReply rep;
- xGEQueryVersionReq *req;
- XGEVersionRec *vers;
-
- GetReq(GEQueryVersion, req);
- req->reqType = info->codes->major_opcode;
- req->ReqType = X_GEQueryVersion;
- req->majorVersion = GE_MAJOR;
- req->minorVersion = GE_MINOR;
-
- if (!_XReply (dpy, (xReply *) &rep, 0, xTrue))
- {
- Xfree(info);
- return NULL;
- }
-
- vers = (XGEVersionRec*)Xmalloc(sizeof(XGEVersionRec));
- vers->major_version = rep.majorVersion;
- vers->minor_version = rep.minorVersion;
- return vers;
-}
-
-/*
- * Display closing routine.
- */
-
-static int
-_xgeDpyClose(Display* dpy, XExtCodes* codes)
-{
- XExtDisplayInfo *info = _xgeFindDisplay(dpy);
-
- if (info->data != NULL) {
- XGEData* xge_data = (XGEData*)info->data;
-
- if (xge_data->extensions)
- {
- XGEExtList current, next;
- current = xge_data->extensions;
- while(current)
- {
- next = current->next;
- Xfree(current);
- current = next;
- }
- }
-
- XFree(xge_data->vers);
- XFree(xge_data);
- }
-
- return XextRemoveDisplay(xge_info, dpy);
-}
-
-/*
- * protocol to Xlib event conversion routine.
- */
-static Bool
-_xgeWireToEvent(Display* dpy, XEvent* re, xEvent *event)
-{
- int extension;
- XGEExtList it;
- XExtDisplayInfo* info = _xgeFindDisplay(dpy);
- if (!info)
- return False;
- /*
- _xgeCheckExtInit() calls LockDisplay, leading to a SIGABRT.
- Well, I guess we don't need the data we get in CheckExtInit anyway
- if (!_xgeCheckExtInit(dpy, info))
- return False;
- */
-
- extension = ((xGenericEvent*)event)->extension;
-
- it = ((XGEData*)info->data)->extensions;
- while(it)
- {
- if (it->extension == extension)
- {
- return (it->hooks->wire_to_event(dpy, re, event));
- }
- it = it->next;
- }
-
- fprintf(stderr,
- "_xgeWireToEvent: Unknown extension %d, this should never happen.\n",
- extension);
- return False;
-}
-
-/*
- * xlib event to protocol conversion routine.
- */
-static Status
-_xgeEventToWire(Display* dpy, XEvent* re, xEvent* event)
-{
- int extension;
- XGEExtList it;
- XExtDisplayInfo* info = _xgeFindDisplay(dpy);
- if (!info)
- return 1; /* error! */
-
- extension = ((XGenericEvent*)re)->extension;
-
- it = ((XGEData*)info->data)->extensions;
- while(it)
- {
- if (it->extension == extension)
- {
- return (it->hooks->event_to_wire(dpy, re, event));
- }
- it = it->next;
- }
-
- fprintf(stderr,
- "_xgeEventToWire: Unknown extension %d, this should never happen.\n",
- extension);
-
- return Success;
-}
-
-/*
- * Extensions need to register callbacks for their events.
- */
-Bool
-xgeExtRegister(Display* dpy, int offset, XExtensionHooks* callbacks)
-{
- XGEExtNode* newExt;
- XGEData* xge_data;
-
- XExtDisplayInfo* info = _xgeFindDisplay(dpy);
- if (!info)
- return False; /* error! */
-
- if (!_xgeCheckExtInit(dpy, info))
- return False;
-
- xge_data = (XGEData*)info->data;
-
- newExt = (XGEExtNode*)Xmalloc(sizeof(XGEExtNode));
- if (!newExt)
- {
- fprintf(stderr, "xgeExtRegister: Failed to alloc memory.\n");
- return False;
- }
-
- newExt->extension = offset;
- newExt->hooks = callbacks;
- newExt->next = xge_data->extensions;
- xge_data->extensions = newExt;
-
- return True;
-}
-
-/***********************************************************************/
-/* Client interfaces */
-/***********************************************************************/
-
-/* Set event_base and error_base to the matching values for XGE.
- * Note that since XGE doesn't use any errors and events, the actual return
- * value is of limited use.
- */
-Bool
-XGEQueryExtension(Display* dpy, int* event_base, int* error_base)
-{
- XExtDisplayInfo* info = _xgeFindDisplay(dpy);
- if (!_xgeCheckExtInit(dpy, info))
- return False;
-
- *event_base = info->codes->first_event;
- *error_base = info->codes->first_error;
- return True;
-}
-
-/* Get XGE version number.
- * Doesn't actually get it from server, that should have been done beforehand
- * already
- */
-Bool
-XGEQueryVersion(Display* dpy,
- int *major_version,
- int *minor_version)
-{
- XExtDisplayInfo* info = _xgeFindDisplay(dpy);
- if (!info)
- return False;
-
- if (!_xgeCheckExtInit(dpy, info))
- return False;
-
- *major_version = ((XGEData*)info->data)->vers->major_version;
- *minor_version = ((XGEData*)info->data)->vers->minor_version;
-
- return True;
-}
-
+/* + * Copyright © 2007-2008 Peter Hutterer + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Authors: Peter Hutterer, University of South Australia, NICTA + */ + +/* + * XGE is an extension to re-use a single opcode for multiple events, + * depending on the extension. XGE allows events >32 bytes. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <X11/extensions/geproto.h> +#include <X11/extensions/ge.h> +#include <X11/Xlibint.h> +#include <X11/extensions/extutil.h> +#include <X11/extensions/Xge.h> + +/***********************************************************************/ +/* internal data structures */ +/***********************************************************************/ + +typedef struct { + int present; + short major_version; + short minor_version; +} XGEVersionRec; + +/* NULL terminated list of registered extensions. */ +typedef struct _XGEExtNode { + int extension; + XExtensionHooks* hooks; + struct _XGEExtNode* next; +} XGEExtNode, *XGEExtList; + +/* Internal data for GE extension */ +typedef struct _XGEData { + XEvent data; + XGEVersionRec *vers; + XGEExtList extensions; +} XGEData; + + +/* forward declarations */ +static XExtDisplayInfo* _xgeFindDisplay(Display*); +static Bool _xgeWireToEvent(Display*, XEvent*, xEvent*); +static Status _xgeEventToWire(Display*, XEvent*, xEvent*); +static int _xgeDpyClose(Display*, XExtCodes*); +static XGEVersionRec* _xgeGetExtensionVersion(Display*, + _Xconst char*, + XExtDisplayInfo*); +static Bool _xgeCheckExtension(Display* dpy, XExtDisplayInfo* info); + +/* main extension information data */ +static XExtensionInfo *xge_info; +static char xge_extension_name[] = GE_NAME; +static XExtensionHooks xge_extension_hooks = { + NULL, /* create_gc */ + NULL, /* copy_gc */ + NULL, /* flush_gc */ + NULL, /* free_gc */ + NULL, /* create_font */ + NULL, /* free_font */ + _xgeDpyClose, /* close_display */ + _xgeWireToEvent, /* wire_to_event */ + _xgeEventToWire, /* event_to_wire */ + NULL, /* error */ + NULL, /* error_string */ +}; + + +static XExtDisplayInfo *_xgeFindDisplay(Display *dpy) +{ + XExtDisplayInfo *dpyinfo; + if (!xge_info) + { + if (!(xge_info = XextCreateExtension())) + return NULL; + } + if (!(dpyinfo = XextFindDisplay (xge_info, dpy))) + { + dpyinfo = XextAddDisplay (xge_info, + dpy, + xge_extension_name, + &xge_extension_hooks, + 0 /* no events, see below */, + NULL); + /* We don't use an extension opcode, so we have to set the handlers + * directly. If GenericEvent would be > 64, the job would be done by + * XExtAddDisplay */ + XESetWireToEvent (dpy, + GenericEvent, + xge_extension_hooks.wire_to_event); + XESetEventToWire (dpy, + GenericEvent, + xge_extension_hooks.event_to_wire); + } + return dpyinfo; +} + +/* + * Check extension is set up and internal data fields are filled. + */ +static Bool +_xgeCheckExtInit(Display* dpy, XExtDisplayInfo* info) +{ + LockDisplay(dpy); + if(!_xgeCheckExtension(dpy, info)) + { + goto cleanup; + } + + if (!info->data) + { + XGEData* data = (XGEData*)Xmalloc(sizeof(XGEData)); + if (!data) { + goto cleanup; + } + /* get version from server */ + data->vers = + _xgeGetExtensionVersion(dpy, "Generic Event Extension", info); + data->extensions = NULL; + info->data = (XPointer)data; + } + + UnlockDisplay(dpy); + return True; + +cleanup: + UnlockDisplay(dpy); + return False; +} + +/* Return 1 if XGE extension exists, 0 otherwise. */ +static Bool +_xgeCheckExtension(Display* dpy, XExtDisplayInfo* info) +{ + return XextHasExtension(info); +} + + +/* Retrieve XGE version number from server. */ +static XGEVersionRec* +_xgeGetExtensionVersion(Display* dpy, + _Xconst char* name, + XExtDisplayInfo*info) +{ + xGEQueryVersionReply rep; + xGEQueryVersionReq *req; + XGEVersionRec *vers; + + GetReq(GEQueryVersion, req); + req->reqType = info->codes->major_opcode; + req->ReqType = X_GEQueryVersion; + req->majorVersion = GE_MAJOR; + req->minorVersion = GE_MINOR; + + if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) + { + Xfree(info); + return NULL; + } + + vers = (XGEVersionRec*)Xmalloc(sizeof(XGEVersionRec)); + vers->major_version = rep.majorVersion; + vers->minor_version = rep.minorVersion; + return vers; +} + +/* + * Display closing routine. + */ + +static int +_xgeDpyClose(Display* dpy, XExtCodes* codes) +{ + XExtDisplayInfo *info = _xgeFindDisplay(dpy); + + if (info->data != NULL) { + XGEData* xge_data = (XGEData*)info->data; + + if (xge_data->extensions) + { + XGEExtList current, next; + current = xge_data->extensions; + while(current) + { + next = current->next; + Xfree(current); + current = next; + } + } + + XFree(xge_data->vers); + XFree(xge_data); + } + + return XextRemoveDisplay(xge_info, dpy); +} + +/* + * protocol to Xlib event conversion routine. + */ +static Bool +_xgeWireToEvent(Display* dpy, XEvent* re, xEvent *event) +{ + int extension; + XGEExtList it; + XExtDisplayInfo* info = _xgeFindDisplay(dpy); + if (!info) + return False; + /* + _xgeCheckExtInit() calls LockDisplay, leading to a SIGABRT. + Well, I guess we don't need the data we get in CheckExtInit anyway + if (!_xgeCheckExtInit(dpy, info)) + return False; + */ + + extension = ((xGenericEvent*)event)->extension; + + it = ((XGEData*)info->data)->extensions; + while(it) + { + if (it->extension == extension) + { + return (it->hooks->wire_to_event(dpy, re, event)); + } + it = it->next; + } + + fprintf(stderr, + "_xgeWireToEvent: Unknown extension %d, this should never happen.\n", + extension); + return False; +} + +/* + * xlib event to protocol conversion routine. + */ +static Status +_xgeEventToWire(Display* dpy, XEvent* re, xEvent* event) +{ + int extension; + XGEExtList it; + XExtDisplayInfo* info = _xgeFindDisplay(dpy); + if (!info) + return 1; /* error! */ + + extension = ((XGenericEvent*)re)->extension; + + it = ((XGEData*)info->data)->extensions; + while(it) + { + if (it->extension == extension) + { + return (it->hooks->event_to_wire(dpy, re, event)); + } + it = it->next; + } + + fprintf(stderr, + "_xgeEventToWire: Unknown extension %d, this should never happen.\n", + extension); + + return Success; +} + +/* + * Extensions need to register callbacks for their events. + */ +Bool +_X_HIDDEN xgeExtRegister(Display* dpy, int offset, XExtensionHooks* callbacks) +{ + XGEExtNode* newExt; + XGEData* xge_data; + + XExtDisplayInfo* info = _xgeFindDisplay(dpy); + if (!info) + return False; /* error! */ + + if (!_xgeCheckExtInit(dpy, info)) + return False; + + xge_data = (XGEData*)info->data; + + newExt = (XGEExtNode*)Xmalloc(sizeof(XGEExtNode)); + if (!newExt) + { + fprintf(stderr, "xgeExtRegister: Failed to alloc memory.\n"); + return False; + } + + newExt->extension = offset; + newExt->hooks = callbacks; + newExt->next = xge_data->extensions; + xge_data->extensions = newExt; + + return True; +} + +/***********************************************************************/ +/* Client interfaces */ +/***********************************************************************/ + +/* Set event_base and error_base to the matching values for XGE. + * Note that since XGE doesn't use any errors and events, the actual return + * value is of limited use. + */ +Bool +XGEQueryExtension(Display* dpy, int* event_base, int* error_base) +{ + XExtDisplayInfo* info = _xgeFindDisplay(dpy); + if (!_xgeCheckExtInit(dpy, info)) + return False; + + *event_base = info->codes->first_event; + *error_base = info->codes->first_error; + return True; +} + +/* Get XGE version number. + * Doesn't actually get it from server, that should have been done beforehand + * already + */ +Bool +XGEQueryVersion(Display* dpy, + int *major_version, + int *minor_version) +{ + XExtDisplayInfo* info = _xgeFindDisplay(dpy); + if (!info) + return False; + + if (!_xgeCheckExtInit(dpy, info)) + return False; + + *major_version = ((XGEData*)info->data)->vers->major_version; + *minor_version = ((XGEData*)info->data)->vers->minor_version; + + return True; +} + |