301 lines
7.4 KiB
C
301 lines
7.4 KiB
C
/* $Xorg: IntAtom.c,v 1.5 2001/02/09 02:03:34 xorgcvs Exp $ */
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/*
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Copyright 1986, 1990, 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
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall
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not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization
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from The Open Group.
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*/
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/* $XFree86: xc/lib/X11/IntAtom.c,v 1.6 2001/12/14 19:54:02 dawes Exp $ */
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#define NEED_REPLIES
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "Xlibint.h"
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#include "Xintatom.h"
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#define HASH(sig) ((sig) & (TABLESIZE-1))
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#define REHASHVAL(sig) ((((sig) % (TABLESIZE-3)) + 2) | 1)
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#define REHASH(idx,rehash) ((idx + rehash) & (TABLESIZE-1))
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void
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_XFreeAtomTable(Display *dpy)
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{
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register Entry *table;
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register int i;
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register Entry e;
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if (dpy->atoms) {
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table = dpy->atoms->table;
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for (i = TABLESIZE; --i >= 0; ) {
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if ((e = *table++) && (e != RESERVED))
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Xfree((char *)e);
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}
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Xfree((char *)dpy->atoms);
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}
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}
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static
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Atom _XInternAtom(
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Display *dpy,
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_Xconst char *name,
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Bool onlyIfExists,
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unsigned long *psig,
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int *pidx,
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int *pn)
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{
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register AtomTable *atoms;
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register char *s1, c, *s2;
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register unsigned long sig;
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register int idx = 0, i;
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Entry e;
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int n, firstidx, rehash = 0;
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xInternAtomReq *req;
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/* look in the cache first */
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if (!(atoms = dpy->atoms)) {
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dpy->atoms = atoms = (AtomTable *)Xcalloc(1, sizeof(AtomTable));
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dpy->free_funcs->atoms = _XFreeAtomTable;
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}
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sig = 0;
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for (s1 = (char *)name; (c = *s1++); )
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sig += c;
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n = s1 - (char *)name - 1;
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if (atoms) {
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firstidx = idx = HASH(sig);
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while ((e = atoms->table[idx])) {
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if (e != RESERVED && e->sig == sig) {
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for (i = n, s1 = (char *)name, s2 = EntryName(e); --i >= 0; ) {
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if (*s1++ != *s2++)
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goto nomatch;
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}
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if (!*s2)
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return e->atom;
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}
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nomatch: if (idx == firstidx)
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rehash = REHASHVAL(sig);
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idx = REHASH(idx, rehash);
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if (idx == firstidx)
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break;
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}
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}
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*psig = sig;
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*pidx = idx;
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if (atoms && !atoms->table[idx])
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atoms->table[idx] = RESERVED; /* reserve slot */
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*pn = n;
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/* not found, go to the server */
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GetReq(InternAtom, req);
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req->nbytes = n;
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req->onlyIfExists = onlyIfExists;
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req->length += (n+3)>>2;
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Data(dpy, name, n);
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return None;
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}
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void
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_XUpdateAtomCache(
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Display *dpy,
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const char *name,
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Atom atom,
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unsigned long sig,
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int idx,
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int n)
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{
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Entry e, oe;
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register char *s1;
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register char c;
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int firstidx, rehash;
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if (!dpy->atoms) {
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if (idx < 0) {
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dpy->atoms = (AtomTable *)Xcalloc(1, sizeof(AtomTable));
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dpy->free_funcs->atoms = _XFreeAtomTable;
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}
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if (!dpy->atoms)
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return;
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}
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if (!sig) {
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for (s1 = (char *)name; (c = *s1++); )
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sig += c;
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n = s1 - (char *)name - 1;
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if (idx < 0) {
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firstidx = idx = HASH(sig);
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if (dpy->atoms->table[idx]) {
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rehash = REHASHVAL(sig);
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do
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idx = REHASH(idx, rehash);
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while (idx != firstidx && dpy->atoms->table[idx]);
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}
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}
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}
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e = (Entry)Xmalloc(sizeof(EntryRec) + n + 1);
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if (e) {
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e->sig = sig;
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e->atom = atom;
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strcpy(EntryName(e), name);
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if ((oe = dpy->atoms->table[idx]) && (oe != RESERVED))
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Xfree((char *)oe);
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dpy->atoms->table[idx] = e;
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}
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}
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Atom
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XInternAtom (
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Display *dpy,
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const char *name,
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Bool onlyIfExists)
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{
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Atom atom;
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unsigned long sig;
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int idx, n;
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xInternAtomReply rep;
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if (!name)
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name = "";
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LockDisplay(dpy);
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if ((atom = _XInternAtom(dpy, name, onlyIfExists, &sig, &idx, &n))) {
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UnlockDisplay(dpy);
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return atom;
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}
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if (dpy->atoms && dpy->atoms->table[idx] == RESERVED)
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dpy->atoms->table[idx] = NULL; /* unreserve slot */
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if (_XReply (dpy, (xReply *)&rep, 0, xTrue)) {
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if ((atom = rep.atom))
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_XUpdateAtomCache(dpy, name, atom, sig, idx, n);
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}
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UnlockDisplay(dpy);
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SyncHandle();
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return (rep.atom);
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}
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typedef struct {
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unsigned long start_seq;
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unsigned long stop_seq;
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char **names;
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Atom *atoms;
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int count;
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Status status;
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} _XIntAtomState;
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static
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Bool _XIntAtomHandler(
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register Display *dpy,
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register xReply *rep,
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char *buf,
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int len,
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XPointer data)
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{
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register _XIntAtomState *state;
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register int i, idx = 0;
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xInternAtomReply replbuf;
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register xInternAtomReply *repl;
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state = (_XIntAtomState *)data;
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if (dpy->last_request_read < state->start_seq ||
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dpy->last_request_read > state->stop_seq)
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return False;
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for (i = 0; i < state->count; i++) {
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if (state->atoms[i] & 0x80000000) {
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idx = ~state->atoms[i];
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state->atoms[i] = None;
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break;
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}
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}
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if (i >= state->count)
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return False;
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if (rep->generic.type == X_Error) {
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state->status = 0;
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return False;
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}
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repl = (xInternAtomReply *)
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_XGetAsyncReply(dpy, (char *)&replbuf, rep, buf, len,
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(SIZEOF(xInternAtomReply) - SIZEOF(xReply)) >> 2,
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True);
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if ((state->atoms[i] = repl->atom))
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_XUpdateAtomCache(dpy, state->names[i], (Atom) repl->atom,
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(unsigned long)0, idx, 0);
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return True;
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}
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Status
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XInternAtoms (
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Display *dpy,
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char **names,
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int count,
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Bool onlyIfExists,
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Atom *atoms_return)
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{
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int i, idx, n, tidx;
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unsigned long sig;
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_XAsyncHandler async;
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_XIntAtomState async_state;
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int missed = -1;
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xInternAtomReply rep;
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LockDisplay(dpy);
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async_state.start_seq = dpy->request + 1;
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async_state.atoms = atoms_return;
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async_state.names = names;
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async_state.count = count - 1;
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async_state.status = 1;
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async.next = dpy->async_handlers;
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async.handler = _XIntAtomHandler;
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async.data = (XPointer)&async_state;
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dpy->async_handlers = &async;
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for (i = 0; i < count; i++) {
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if (!(atoms_return[i] = _XInternAtom(dpy, names[i], onlyIfExists,
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&sig, &idx, &n))) {
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missed = i;
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atoms_return[i] = ~((Atom)idx);
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async_state.stop_seq = dpy->request;
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}
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}
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if (missed >= 0) {
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if (dpy->atoms) {
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/* unreserve anything we just reserved */
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for (i = 0; i < count; i++) {
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if (atoms_return[i] & 0x80000000) {
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tidx = ~atoms_return[i];
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if (dpy->atoms->table[tidx] == RESERVED)
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dpy->atoms->table[tidx] = NULL;
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}
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}
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}
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if (_XReply (dpy, (xReply *)&rep, 0, xTrue)) {
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if ((atoms_return[missed] = rep.atom))
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_XUpdateAtomCache(dpy, names[missed], (Atom) rep.atom,
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sig, idx, n);
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} else {
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atoms_return[missed] = None;
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async_state.status = 0;
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}
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}
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DeqAsyncHandler(dpy, &async);
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UnlockDisplay(dpy);
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if (missed >= 0)
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SyncHandle();
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return async_state.status;
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}
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