405 lines
11 KiB
C
405 lines
11 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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******************************************************************/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <X11/X.h>
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#include <X11/Xproto.h>
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#include "misc.h"
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#include "dixstruct.h"
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#include "extnsionst.h"
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#include "gcstruct.h"
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#include "scrnintstr.h"
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#include "dispatch.h"
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#define EXTENSION_BASE 128
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#define EXTENSION_EVENT_BASE 64
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#define LAST_EVENT 128
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#define LAST_ERROR 255
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ScreenProcEntry AuxillaryScreenProcs[MAXSCREENS];
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static ExtensionEntry **extensions = (ExtensionEntry **) NULL;
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int lastEvent = EXTENSION_EVENT_BASE;
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static int lastError = FirstExtensionError;
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static unsigned int NumExtensions = 0;
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extern int extensionPrivateLen;
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extern unsigned *extensionPrivateSizes;
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extern unsigned totalExtensionSize;
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static void
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InitExtensionPrivates(ExtensionEntry * ext)
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{
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char *ptr;
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DevUnion *ppriv;
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unsigned *sizes;
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unsigned size;
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int i;
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if (totalExtensionSize == sizeof(ExtensionEntry))
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ppriv = (DevUnion *) NULL;
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else
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ppriv = (DevUnion *) (ext + 1);
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ext->devPrivates = ppriv;
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sizes = extensionPrivateSizes;
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ptr = (char *) (ppriv + extensionPrivateLen);
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for (i = extensionPrivateLen; --i >= 0; ppriv++, sizes++) {
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if ((size = *sizes)) {
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ppriv->ptr = (pointer) ptr;
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ptr += size;
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}
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else
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ppriv->ptr = (pointer) NULL;
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}
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}
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_X_EXPORT ExtensionEntry *
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AddExtension(char *name, int NumEvents, int NumErrors,
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int (*MainProc) (ClientPtr c1),
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int (*SwappedMainProc) (ClientPtr c2),
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void (*CloseDownProc) (ExtensionEntry * e),
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unsigned short (*MinorOpcodeProc) (ClientPtr c3))
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{
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int i;
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ExtensionEntry *ext, **newexts;
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if (!MainProc || !SwappedMainProc || !CloseDownProc || !MinorOpcodeProc)
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return ((ExtensionEntry *) NULL);
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if ((lastEvent + NumEvents > LAST_EVENT) ||
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(unsigned) (lastError + NumErrors > LAST_ERROR))
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return ((ExtensionEntry *) NULL);
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ext = malloc(totalExtensionSize);
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if (!ext)
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return ((ExtensionEntry *) NULL);
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bzero(ext, totalExtensionSize);
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InitExtensionPrivates(ext);
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ext->name = malloc(strlen(name) + 1);
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ext->num_aliases = 0;
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ext->aliases = (char **) NULL;
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if (!ext->name) {
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free(ext);
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return ((ExtensionEntry *) NULL);
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}
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strcpy(ext->name, name);
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i = NumExtensions;
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newexts = (ExtensionEntry **) realloc(extensions,
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(i + 1) * sizeof(ExtensionEntry *));
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if (!newexts) {
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free(ext->name);
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free(ext);
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return ((ExtensionEntry *) NULL);
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}
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NumExtensions++;
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extensions = newexts;
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extensions[i] = ext;
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ext->index = i;
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ext->base = i + EXTENSION_BASE;
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ext->CloseDown = CloseDownProc;
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ext->MinorOpcode = MinorOpcodeProc;
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ProcVector[i + EXTENSION_BASE] = MainProc;
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SwappedProcVector[i + EXTENSION_BASE] = SwappedMainProc;
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if (NumEvents) {
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ext->eventBase = lastEvent;
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ext->eventLast = lastEvent + NumEvents;
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lastEvent += NumEvents;
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}
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else {
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ext->eventBase = 0;
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ext->eventLast = 0;
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}
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if (NumErrors) {
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ext->errorBase = lastError;
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ext->errorLast = lastError + NumErrors;
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lastError += NumErrors;
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}
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else {
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ext->errorBase = 0;
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ext->errorLast = 0;
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}
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return (ext);
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}
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static int
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FindExtension(char *extname, int len)
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{
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int i, j;
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for (i = 0; i < NumExtensions; i++) {
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if ((strlen(extensions[i]->name) == len) &&
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!strncmp(extname, extensions[i]->name, len))
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break;
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for (j = extensions[i]->num_aliases; --j >= 0;) {
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if ((strlen(extensions[i]->aliases[j]) == len) &&
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!strncmp(extname, extensions[i]->aliases[j], len))
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break;
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}
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if (j >= 0)
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break;
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}
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return ((i == NumExtensions) ? -1 : i);
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}
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_X_EXPORT void
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DeclareExtensionSecurity(char *extname, Bool secure)
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{
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}
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_X_EXPORT unsigned short
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StandardMinorOpcode(ClientPtr client)
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{
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return ((xReq *) client->requestBuffer)->data;
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}
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_X_EXPORT unsigned short
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MinorOpcodeOfRequest(ClientPtr client)
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{
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unsigned char major;
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major = ((xReq *) client->requestBuffer)->reqType;
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if (major < EXTENSION_BASE)
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return 0;
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major -= EXTENSION_BASE;
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if (major >= NumExtensions)
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return 0;
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return (*extensions[major]->MinorOpcode) (client);
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}
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void
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CloseDownExtensions()
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{
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int i, j;
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for (i = NumExtensions - 1; i >= 0; i--) {
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(*extensions[i]->CloseDown) (extensions[i]);
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NumExtensions = i;
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free(extensions[i]->name);
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for (j = extensions[i]->num_aliases; --j >= 0;)
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free(extensions[i]->aliases[j]);
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free(extensions[i]->aliases);
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free(extensions[i]);
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}
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free(extensions);
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extensions = (ExtensionEntry **) NULL;
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lastEvent = EXTENSION_EVENT_BASE;
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lastError = FirstExtensionError;
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for (i = 0; i < MAXSCREENS; i++) {
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ScreenProcEntry *spentry = &AuxillaryScreenProcs[i];
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while (spentry->num) {
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spentry->num--;
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free(spentry->procList[spentry->num].name);
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}
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free(spentry->procList);
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spentry->procList = (ProcEntryPtr) NULL;
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}
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}
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int
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ProcQueryExtension(ClientPtr client)
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{
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xQueryExtensionReply reply = {0};
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int i;
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REQUEST(xQueryExtensionReq);
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REQUEST_FIXED_SIZE(xQueryExtensionReq, stuff->nbytes);
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reply.type = X_Reply;
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reply.length = 0;
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reply.major_opcode = 0;
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reply.sequenceNumber = client->sequence;
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if (!NumExtensions)
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reply.present = xFalse;
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else {
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i = FindExtension((char *) &stuff[1], stuff->nbytes);
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if (i < 0
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)
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reply.present = xFalse;
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else {
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reply.present = xTrue;
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reply.major_opcode = extensions[i]->base;
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reply.first_event = extensions[i]->eventBase;
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reply.first_error = extensions[i]->errorBase;
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}
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}
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WriteReplyToClient(client, sizeof(xQueryExtensionReply), &reply);
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return (client->noClientException);
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}
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int
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ProcListExtensions(ClientPtr client)
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{
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xListExtensionsReply reply = {0};
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char *bufptr, *buffer;
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int total_length = 0;
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REQUEST_SIZE_MATCH(xReq);
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reply.type = X_Reply;
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reply.nExtensions = 0;
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reply.length = 0;
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reply.sequenceNumber = client->sequence;
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buffer = NULL;
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if (NumExtensions) {
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int i, j;
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for (i = 0; i < NumExtensions; i++) {
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total_length += strlen(extensions[i]->name) + 1;
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reply.nExtensions += 1 + extensions[i]->num_aliases;
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for (j = extensions[i]->num_aliases; --j >= 0;)
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total_length += strlen(extensions[i]->aliases[j]) + 1;
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}
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reply.length = (total_length + 3) >> 2;
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buffer = bufptr = (char *) ALLOCATE_LOCAL(total_length);
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if (!buffer)
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return (BadAlloc);
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for (i = 0; i < NumExtensions; i++) {
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int len;
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*bufptr++ = len = strlen(extensions[i]->name);
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memmove(bufptr, extensions[i]->name, len);
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bufptr += len;
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for (j = extensions[i]->num_aliases; --j >= 0;) {
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*bufptr++ = len = strlen(extensions[i]->aliases[j]);
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memmove(bufptr, extensions[i]->aliases[j], len);
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bufptr += len;
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}
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}
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}
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WriteReplyToClient(client, sizeof(xListExtensionsReply), &reply);
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if (reply.length) {
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WriteToClient(client, total_length, buffer);
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DEALLOCATE_LOCAL(buffer);
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}
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return (client->noClientException);
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}
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ExtensionLookupProc
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LookupProc(char *name, GCPtr pGC)
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{
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int i;
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ScreenProcEntry *spentry;
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spentry = &AuxillaryScreenProcs[pGC->pScreen->myNum];
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if (spentry->num) {
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for (i = 0; i < spentry->num; i++)
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if (strcmp(name, spentry->procList[i].name) == 0)
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return (spentry->procList[i].proc);
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}
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return (ExtensionLookupProc) NULL;
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}
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Bool
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RegisterProc(char *name, GC * pGC, ExtensionLookupProc proc)
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{
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return RegisterScreenProc(name, pGC->pScreen, proc);
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}
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Bool
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RegisterScreenProc(char *name, ScreenPtr pScreen, ExtensionLookupProc proc)
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{
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ScreenProcEntry *spentry;
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ProcEntryPtr procEntry = (ProcEntryPtr) NULL;
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char *newname;
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int i;
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spentry = &AuxillaryScreenProcs[pScreen->myNum];
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/* first replace duplicates */
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if (spentry->num) {
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for (i = 0; i < spentry->num; i++)
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if (strcmp(name, spentry->procList[i].name) == 0) {
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procEntry = &spentry->procList[i];
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break;
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}
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}
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if (procEntry)
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procEntry->proc = proc;
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else {
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newname = malloc(strlen(name) + 1);
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if (!newname)
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return FALSE;
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procEntry = (ProcEntryPtr)
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realloc(spentry->procList,
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sizeof(ProcEntryRec) * (spentry->num + 1));
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if (!procEntry) {
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free(newname);
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return FALSE;
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}
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spentry->procList = procEntry;
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procEntry += spentry->num;
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procEntry->name = newname;
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strcpy(newname, name);
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procEntry->proc = proc;
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spentry->num++;
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}
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return TRUE;
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}
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