/* $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; }