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-rw-r--r--libX11/src/IntAtom.c300
1 files changed, 300 insertions, 0 deletions
diff --git a/libX11/src/IntAtom.c b/libX11/src/IntAtom.c
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+/* $Xorg: IntAtom.c,v 1.5 2001/02/09 02:03:34 xorgcvs Exp $ */
+/*
+
+Copyright 1986, 1990, 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.
+
+*/
+/* $XFree86: xc/lib/X11/IntAtom.c,v 1.6 2001/12/14 19:54:02 dawes Exp $ */
+
+#define NEED_REPLIES
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xintatom.h"
+
+#define HASH(sig) ((sig) & (TABLESIZE-1))
+#define REHASHVAL(sig) ((((sig) % (TABLESIZE-3)) + 2) | 1)
+#define REHASH(idx,rehash) ((idx + rehash) & (TABLESIZE-1))
+
+void
+_XFreeAtomTable(Display *dpy)
+{
+ register Entry *table;
+ register int i;
+ register Entry e;
+
+ if (dpy->atoms) {
+ table = dpy->atoms->table;
+ for (i = TABLESIZE; --i >= 0; ) {
+ if ((e = *table++) && (e != RESERVED))
+ Xfree((char *)e);
+ }
+ Xfree((char *)dpy->atoms);
+ }
+}
+
+static
+Atom _XInternAtom(
+ Display *dpy,
+ _Xconst char *name,
+ Bool onlyIfExists,
+ unsigned long *psig,
+ int *pidx,
+ int *pn)
+{
+ register AtomTable *atoms;
+ register char *s1, c, *s2;
+ register unsigned long sig;
+ register int idx = 0, i;
+ Entry e;
+ int n, firstidx, rehash = 0;
+ xInternAtomReq *req;
+
+ /* look in the cache first */
+ if (!(atoms = dpy->atoms)) {
+ dpy->atoms = atoms = (AtomTable *)Xcalloc(1, sizeof(AtomTable));
+ dpy->free_funcs->atoms = _XFreeAtomTable;
+ }
+ sig = 0;
+ for (s1 = (char *)name; (c = *s1++); )
+ sig += c;
+ n = s1 - (char *)name - 1;
+ if (atoms) {
+ firstidx = idx = HASH(sig);
+ while ((e = atoms->table[idx])) {
+ if (e != RESERVED && e->sig == sig) {
+ for (i = n, s1 = (char *)name, s2 = EntryName(e); --i >= 0; ) {
+ if (*s1++ != *s2++)
+ goto nomatch;
+ }
+ if (!*s2)
+ return e->atom;
+ }
+nomatch: if (idx == firstidx)
+ rehash = REHASHVAL(sig);
+ idx = REHASH(idx, rehash);
+ if (idx == firstidx)
+ break;
+ }
+ }
+ *psig = sig;
+ *pidx = idx;
+ if (atoms && !atoms->table[idx])
+ atoms->table[idx] = RESERVED; /* reserve slot */
+ *pn = n;
+ /* not found, go to the server */
+ GetReq(InternAtom, req);
+ req->nbytes = n;
+ req->onlyIfExists = onlyIfExists;
+ req->length += (n+3)>>2;
+ Data(dpy, name, n);
+ return None;
+}
+
+void
+_XUpdateAtomCache(
+ Display *dpy,
+ const char *name,
+ Atom atom,
+ unsigned long sig,
+ int idx,
+ int n)
+{
+ Entry e, oe;
+ register char *s1;
+ register char c;
+ int firstidx, rehash;
+
+ if (!dpy->atoms) {
+ if (idx < 0) {
+ dpy->atoms = (AtomTable *)Xcalloc(1, sizeof(AtomTable));
+ dpy->free_funcs->atoms = _XFreeAtomTable;
+ }
+ if (!dpy->atoms)
+ return;
+ }
+ if (!sig) {
+ for (s1 = (char *)name; (c = *s1++); )
+ sig += c;
+ n = s1 - (char *)name - 1;
+ if (idx < 0) {
+ firstidx = idx = HASH(sig);
+ if (dpy->atoms->table[idx]) {
+ rehash = REHASHVAL(sig);
+ do
+ idx = REHASH(idx, rehash);
+ while (idx != firstidx && dpy->atoms->table[idx]);
+ }
+ }
+ }
+ e = (Entry)Xmalloc(sizeof(EntryRec) + n + 1);
+ if (e) {
+ e->sig = sig;
+ e->atom = atom;
+ strcpy(EntryName(e), name);
+ if ((oe = dpy->atoms->table[idx]) && (oe != RESERVED))
+ Xfree((char *)oe);
+ dpy->atoms->table[idx] = e;
+ }
+}
+
+Atom
+XInternAtom (
+ Display *dpy,
+ const char *name,
+ Bool onlyIfExists)
+{
+ Atom atom;
+ unsigned long sig;
+ int idx, n;
+ xInternAtomReply rep;
+
+ if (!name)
+ name = "";
+ LockDisplay(dpy);
+ if ((atom = _XInternAtom(dpy, name, onlyIfExists, &sig, &idx, &n))) {
+ UnlockDisplay(dpy);
+ return atom;
+ }
+ if (dpy->atoms && dpy->atoms->table[idx] == RESERVED)
+ dpy->atoms->table[idx] = NULL; /* unreserve slot */
+ if (_XReply (dpy, (xReply *)&rep, 0, xTrue)) {
+ if ((atom = rep.atom))
+ _XUpdateAtomCache(dpy, name, atom, sig, idx, n);
+ }
+ UnlockDisplay(dpy);
+ SyncHandle();
+ return (rep.atom);
+}
+
+typedef struct {
+ unsigned long start_seq;
+ unsigned long stop_seq;
+ char **names;
+ Atom *atoms;
+ int count;
+ Status status;
+} _XIntAtomState;
+
+static
+Bool _XIntAtomHandler(
+ register Display *dpy,
+ register xReply *rep,
+ char *buf,
+ int len,
+ XPointer data)
+{
+ register _XIntAtomState *state;
+ register int i, idx = 0;
+ xInternAtomReply replbuf;
+ register xInternAtomReply *repl;
+
+ state = (_XIntAtomState *)data;
+ if (dpy->last_request_read < state->start_seq ||
+ dpy->last_request_read > state->stop_seq)
+ return False;
+ for (i = 0; i < state->count; i++) {
+ if (state->atoms[i] & 0x80000000) {
+ idx = ~state->atoms[i];
+ state->atoms[i] = None;
+ break;
+ }
+ }
+ if (i >= state->count)
+ return False;
+ if (rep->generic.type == X_Error) {
+ state->status = 0;
+ return False;
+ }
+ repl = (xInternAtomReply *)
+ _XGetAsyncReply(dpy, (char *)&replbuf, rep, buf, len,
+ (SIZEOF(xInternAtomReply) - SIZEOF(xReply)) >> 2,
+ True);
+ if ((state->atoms[i] = repl->atom))
+ _XUpdateAtomCache(dpy, state->names[i], (Atom) repl->atom,
+ (unsigned long)0, idx, 0);
+ return True;
+}
+
+Status
+XInternAtoms (
+ Display *dpy,
+ char **names,
+ int count,
+ Bool onlyIfExists,
+ Atom *atoms_return)
+{
+ int i, idx, n, tidx;
+ unsigned long sig;
+ _XAsyncHandler async;
+ _XIntAtomState async_state;
+ int missed = -1;
+ xInternAtomReply rep;
+
+ LockDisplay(dpy);
+ async_state.start_seq = dpy->request + 1;
+ async_state.atoms = atoms_return;
+ async_state.names = names;
+ async_state.count = count - 1;
+ async_state.status = 1;
+ async.next = dpy->async_handlers;
+ async.handler = _XIntAtomHandler;
+ async.data = (XPointer)&async_state;
+ dpy->async_handlers = &async;
+ for (i = 0; i < count; i++) {
+ if (!(atoms_return[i] = _XInternAtom(dpy, names[i], onlyIfExists,
+ &sig, &idx, &n))) {
+ missed = i;
+ atoms_return[i] = ~((Atom)idx);
+ async_state.stop_seq = dpy->request;
+ }
+ }
+ if (missed >= 0) {
+ if (dpy->atoms) {
+ /* unreserve anything we just reserved */
+ for (i = 0; i < count; i++) {
+ if (atoms_return[i] & 0x80000000) {
+ tidx = ~atoms_return[i];
+ if (dpy->atoms->table[tidx] == RESERVED)
+ dpy->atoms->table[tidx] = NULL;
+ }
+ }
+ }
+ if (_XReply (dpy, (xReply *)&rep, 0, xTrue)) {
+ if ((atoms_return[missed] = rep.atom))
+ _XUpdateAtomCache(dpy, names[missed], (Atom) rep.atom,
+ sig, idx, n);
+ } else {
+ atoms_return[missed] = None;
+ async_state.status = 0;
+ }
+ }
+ DeqAsyncHandler(dpy, &async);
+ UnlockDisplay(dpy);
+ if (missed >= 0)
+ SyncHandle();
+ return async_state.status;
+}
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