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-rw-r--r--libX11/src/Context.c604
1 files changed, 302 insertions, 302 deletions
diff --git a/libX11/src/Context.c b/libX11/src/Context.c
index 79ae7d66c..ae059cb5c 100644
--- a/libX11/src/Context.c
+++ b/libX11/src/Context.c
@@ -1,302 +1,302 @@
-
-/***********************************************************
-Copyright 1987, 1988, 1990 by Digital Equipment Corporation, Maynard,
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name Digital not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-
-******************************************************************/
-
-/*
-
-Copyright 1987, 1988, 1990, 1994, 1998 The Open Group
-
-Permission to use, copy, modify, distribute, and sell this software and its
-documentation for any purpose is hereby granted without fee, provided that
-the above copyright notice appear in all copies and that both that
-copyright notice and this permission notice appear in supporting
-documentation.
-
-The above copyright notice and this permission notice 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 OPEN GROUP 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.
-
-Except as contained in this notice, the name of The Open Group shall
-not be used in advertising or otherwise to promote the sale, use or
-other dealings in this Software without prior written authorization
-from The Open Group.
-
-*/
-
-/* This module implements a simple sparse array.
-
- XSaveContext(a,b,c,d) will store d in position (a,b,c) of the array.
- XFindContext(a,b,c,&d) will set d to be the value in position (a,b,c).
- XDeleteContext(a,b,c) will delete the entry in (a,b,c).
-
- a is a display id, b is a resource id, and c is a Context. d is just an
- XPointer. This code will work with any range of parameters, but is geared
- to be most efficient with very few (one or two) different a's.
-
-*/
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include "Xlibint.h"
-#include "Xutil.h"
-#ifdef XTHREADS
-#include "locking.h"
-#endif
-
-#define INITHASHMASK 63 /* Number of entries originally in the hash table. */
-
-typedef struct _TableEntryRec { /* Stores one entry. */
- XID rid;
- XContext context;
- XPointer data;
- struct _TableEntryRec *next;
-} TableEntryRec, *TableEntry;
-
-typedef struct _XContextDB { /* Stores hash table for one display. */
- TableEntry *table; /* Pointer to array of hash entries. */
- int mask; /* Current size of hash table minus 1. */
- int numentries; /* Number of entries currently in table. */
-#ifdef XTHREADS
- LockInfoRec linfo;
-#endif
-} DBRec, *DB;
-
-#ifdef MOTIFBC
-static DB NullDB = (DB)0;
-#endif
-
-/* Given an XID and a context, returns a value between 0 and HashSize-1.
- Currently, this requires that HashSize be a power of 2.
-*/
-
-#define Hash(db,rid,context) \
- (db)->table[(((rid) << 1) + context) & (db)->mask]
-
-/* Resize the given db */
-
-static void ResizeTable(DB db)
-{
- TableEntry *otable;
- register TableEntry entry, next, *pold, *head;
- register int i, j;
-
- otable = db->table;
- for (i = INITHASHMASK+1; (i + i) < db->numentries; )
- i += i;
- db->table = (TableEntry *) Xcalloc((unsigned)i, sizeof(TableEntry));
- if (!db->table) {
- db->table = otable;
- return;
- }
- j = db->mask + 1;
- db->mask = i - 1;
- for (pold = otable ; --j >= 0; pold++) {
- for (entry = *pold; entry; entry = next) {
- next = entry->next;
- head = &Hash(db, entry->rid, entry->context);
- entry->next = *head;
- *head = entry;
- }
- }
- Xfree((char *) otable);
-}
-
-static void _XFreeContextDB(Display *display)
-{
- register DB db;
- register int i;
- register TableEntry *pentry, entry, next;
-
- db = display->context_db;
- if (db) {
- for (i = db->mask + 1, pentry = db->table ; --i >= 0; pentry++) {
- for (entry = *pentry; entry; entry = next) {
- next = entry->next;
- Xfree((char *)entry);
- }
- }
- Xfree((char *) db->table);
- _XFreeMutex(&db->linfo);
- Xfree((char *) db);
- }
-}
-
-/* Public routines. */
-
-/* Save the given value of data to correspond with the keys XID and context.
- Returns nonzero error code if an error has occured, 0 otherwise.
- Possible errors are Out-of-memory.
-*/
-
-int XSaveContext(
- Display *display,
- register XID rid,
- register XContext context,
- _Xconst char* data)
-{
- DB *pdb;
- register DB db;
- TableEntry *head;
- register TableEntry entry;
-
-#ifdef MOTIFBC
- if (!display) {
- pdb = &NullDB;
- db = *pdb;
- } else
-#endif
- {
- LockDisplay(display);
- pdb = &display->context_db;
- db = *pdb;
- UnlockDisplay(display);
- }
- if (!db) {
- db = (DB) Xmalloc(sizeof(DBRec));
- if (!db)
- return XCNOMEM;
- db->mask = INITHASHMASK;
- db->table = (TableEntry *)Xcalloc(db->mask + 1, sizeof(TableEntry));
- if (!db->table) {
- Xfree((char *)db);
- return XCNOMEM;
- }
- db->numentries = 0;
- _XCreateMutex(&db->linfo);
-#ifdef MOTIFBC
- if (!display) *pdb = db; else
-#endif
- {
- LockDisplay(display);
- *pdb = db;
- display->free_funcs->context_db = _XFreeContextDB;
- UnlockDisplay(display);
- }
- }
- _XLockMutex(&db->linfo);
- head = &Hash(db, rid, context);
- _XUnlockMutex(&db->linfo);
- for (entry = *head; entry; entry = entry->next) {
- if (entry->rid == rid && entry->context == context) {
- entry->data = (XPointer)data;
- return 0;
- }
- }
- entry = (TableEntry) Xmalloc(sizeof(TableEntryRec));
- if (!entry)
- return XCNOMEM;
- entry->rid = rid;
- entry->context = context;
- entry->data = (XPointer)data;
- entry->next = *head;
- *head = entry;
- _XLockMutex(&db->linfo);
- db->numentries++;
- if (db->numentries > (db->mask << 2))
- ResizeTable(db);
- _XUnlockMutex(&db->linfo);
- return 0;
-}
-
-
-
-/* Given an XID and context, returns the associated data. Note that data
- here is a pointer since it is a return value. Returns nonzero error code
- if an error has occured, 0 otherwise. Possible errors are Entry-not-found.
-*/
-
-int XFindContext(Display *display, XID rid, XContext context, XPointer *data)
-{
- register DB db;
- register TableEntry entry;
-
-#ifdef MOTIFBC
- if (!display) db = NullDB; else
-#endif
- {
- LockDisplay(display);
- db = display->context_db;
- UnlockDisplay(display);
- }
- if (!db)
- return XCNOENT;
- _XLockMutex(&db->linfo);
- for (entry = Hash(db, rid, context); entry; entry = entry->next)
- {
- if (entry->rid == rid && entry->context == context) {
- *data = (XPointer)entry->data;
- _XUnlockMutex(&db->linfo);
- return 0;
- }
- }
- _XUnlockMutex(&db->linfo);
- return XCNOENT;
-}
-
-
-
-/* Deletes the entry for the given XID and context from the datastructure.
- This returns the same thing that FindContext would have returned if called
- with the same arguments.
-*/
-
-int XDeleteContext(Display *display, XID rid, XContext context)
-{
- register DB db;
- register TableEntry entry, *prev;
-
-#ifdef MOTIFBC
- if (!display) db = NullDB; else
-#endif
- {
- LockDisplay(display);
- db = display->context_db;
- UnlockDisplay(display);
- }
- if (!db)
- return XCNOENT;
- _XLockMutex(&db->linfo);
- for (prev = &Hash(db, rid, context);
- (entry = *prev);
- prev = &entry->next) {
- if (entry->rid == rid && entry->context == context) {
- *prev = entry->next;
- Xfree((char *) entry);
- db->numentries--;
- if (db->numentries < db->mask && db->mask > INITHASHMASK)
- ResizeTable(db);
- _XUnlockMutex(&db->linfo);
- return 0;
- }
- }
- _XUnlockMutex(&db->linfo);
- return XCNOENT;
-}
+
+/***********************************************************
+Copyright 1987, 1988, 1990 by Digital Equipment Corporation, Maynard,
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+
+/*
+
+Copyright 1987, 1988, 1990, 1994, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice 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 OPEN GROUP 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.
+
+Except as contained in this notice, the name of The Open Group shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from The Open Group.
+
+*/
+
+/* This module implements a simple sparse array.
+
+ XSaveContext(a,b,c,d) will store d in position (a,b,c) of the array.
+ XFindContext(a,b,c,&d) will set d to be the value in position (a,b,c).
+ XDeleteContext(a,b,c) will delete the entry in (a,b,c).
+
+ a is a display id, b is a resource id, and c is a Context. d is just an
+ XPointer. This code will work with any range of parameters, but is geared
+ to be most efficient with very few (one or two) different a's.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xutil.h"
+#ifdef XTHREADS
+#include "locking.h"
+#endif
+
+#define INITHASHMASK 63 /* Number of entries originally in the hash table. */
+
+typedef struct _TableEntryRec { /* Stores one entry. */
+ XID rid;
+ XContext context;
+ XPointer data;
+ struct _TableEntryRec *next;
+} TableEntryRec, *TableEntry;
+
+typedef struct _XContextDB { /* Stores hash table for one display. */
+ TableEntry *table; /* Pointer to array of hash entries. */
+ int mask; /* Current size of hash table minus 1. */
+ int numentries; /* Number of entries currently in table. */
+#ifdef XTHREADS
+ LockInfoRec linfo;
+#endif
+} DBRec, *DB;
+
+#ifdef MOTIFBC
+static DB NullDB = (DB)0;
+#endif
+
+/* Given an XID and a context, returns a value between 0 and HashSize-1.
+ Currently, this requires that HashSize be a power of 2.
+*/
+
+#define Hash(db,rid,context) \
+ (db)->table[(((rid) << 1) + context) & (db)->mask]
+
+/* Resize the given db */
+
+static void ResizeTable(DB db)
+{
+ TableEntry *otable;
+ register TableEntry entry, next, *pold, *head;
+ register int i, j;
+
+ otable = db->table;
+ for (i = INITHASHMASK+1; (i + i) < db->numentries; )
+ i += i;
+ db->table = (TableEntry *) Xcalloc((unsigned)i, sizeof(TableEntry));
+ if (!db->table) {
+ db->table = otable;
+ return;
+ }
+ j = db->mask + 1;
+ db->mask = i - 1;
+ for (pold = otable ; --j >= 0; pold++) {
+ for (entry = *pold; entry; entry = next) {
+ next = entry->next;
+ head = &Hash(db, entry->rid, entry->context);
+ entry->next = *head;
+ *head = entry;
+ }
+ }
+ Xfree((char *) otable);
+}
+
+static void _XFreeContextDB(Display *display)
+{
+ register DB db;
+ register int i;
+ register TableEntry *pentry, entry, next;
+
+ db = display->context_db;
+ if (db) {
+ for (i = db->mask + 1, pentry = db->table ; --i >= 0; pentry++) {
+ for (entry = *pentry; entry; entry = next) {
+ next = entry->next;
+ Xfree((char *)entry);
+ }
+ }
+ Xfree((char *) db->table);
+ _XFreeMutex(&db->linfo);
+ Xfree((char *) db);
+ }
+}
+
+/* Public routines. */
+
+/* Save the given value of data to correspond with the keys XID and context.
+ Returns nonzero error code if an error has occured, 0 otherwise.
+ Possible errors are Out-of-memory.
+*/
+
+int XSaveContext(
+ Display *display,
+ register XID rid,
+ register XContext context,
+ _Xconst char* data)
+{
+ DB *pdb;
+ register DB db;
+ TableEntry *head;
+ register TableEntry entry;
+
+#ifdef MOTIFBC
+ if (!display) {
+ pdb = &NullDB;
+ db = *pdb;
+ } else
+#endif
+ {
+ LockDisplay(display);
+ pdb = &display->context_db;
+ db = *pdb;
+ UnlockDisplay(display);
+ }
+ if (!db) {
+ db = (DB) Xmalloc(sizeof(DBRec));
+ if (!db)
+ return XCNOMEM;
+ db->mask = INITHASHMASK;
+ db->table = (TableEntry *)Xcalloc(db->mask + 1, sizeof(TableEntry));
+ if (!db->table) {
+ Xfree((char *)db);
+ return XCNOMEM;
+ }
+ db->numentries = 0;
+ _XCreateMutex(&db->linfo);
+#ifdef MOTIFBC
+ if (!display) *pdb = db; else
+#endif
+ {
+ LockDisplay(display);
+ *pdb = db;
+ display->free_funcs->context_db = _XFreeContextDB;
+ UnlockDisplay(display);
+ }
+ }
+ _XLockMutex(&db->linfo);
+ head = &Hash(db, rid, context);
+ _XUnlockMutex(&db->linfo);
+ for (entry = *head; entry; entry = entry->next) {
+ if (entry->rid == rid && entry->context == context) {
+ entry->data = (XPointer)data;
+ return 0;
+ }
+ }
+ entry = (TableEntry) Xmalloc(sizeof(TableEntryRec));
+ if (!entry)
+ return XCNOMEM;
+ entry->rid = rid;
+ entry->context = context;
+ entry->data = (XPointer)data;
+ entry->next = *head;
+ *head = entry;
+ _XLockMutex(&db->linfo);
+ db->numentries++;
+ if (db->numentries > (db->mask << 2))
+ ResizeTable(db);
+ _XUnlockMutex(&db->linfo);
+ return 0;
+}
+
+
+
+/* Given an XID and context, returns the associated data. Note that data
+ here is a pointer since it is a return value. Returns nonzero error code
+ if an error has occured, 0 otherwise. Possible errors are Entry-not-found.
+*/
+
+int XFindContext(Display *display, XID rid, XContext context, XPointer *data)
+{
+ register DB db;
+ register TableEntry entry;
+
+#ifdef MOTIFBC
+ if (!display) db = NullDB; else
+#endif
+ {
+ LockDisplay(display);
+ db = display->context_db;
+ UnlockDisplay(display);
+ }
+ if (!db)
+ return XCNOENT;
+ _XLockMutex(&db->linfo);
+ for (entry = Hash(db, rid, context); entry; entry = entry->next)
+ {
+ if (entry->rid == rid && entry->context == context) {
+ *data = (XPointer)entry->data;
+ _XUnlockMutex(&db->linfo);
+ return 0;
+ }
+ }
+ _XUnlockMutex(&db->linfo);
+ return XCNOENT;
+}
+
+
+
+/* Deletes the entry for the given XID and context from the datastructure.
+ This returns the same thing that FindContext would have returned if called
+ with the same arguments.
+*/
+
+int XDeleteContext(Display *display, XID rid, XContext context)
+{
+ register DB db;
+ register TableEntry entry, *prev;
+
+#ifdef MOTIFBC
+ if (!display) db = NullDB; else
+#endif
+ {
+ LockDisplay(display);
+ db = display->context_db;
+ UnlockDisplay(display);
+ }
+ if (!db)
+ return XCNOENT;
+ _XLockMutex(&db->linfo);
+ for (prev = &Hash(db, rid, context);
+ (entry = *prev);
+ prev = &entry->next) {
+ if (entry->rid == rid && entry->context == context) {
+ *prev = entry->next;
+ Xfree((char *) entry);
+ db->numentries--;
+ if (db->numentries < db->mask && db->mask > INITHASHMASK)
+ ResizeTable(db);
+ _XUnlockMutex(&db->linfo);
+ return 0;
+ }
+ }
+ _XUnlockMutex(&db->linfo);
+ return XCNOENT;
+}
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