/* $Xorg: xkbatom.c,v 1.4 2001/02/09 02:04:05 xorgcvs Exp $ */ /*********************************************************** Copyright 1987, 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. Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. 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 of 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 1994 by Silicon Graphics Computer Systems, Inc. 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 of Silicon Graphics not be used in advertising or publicity pertaining to distribution of the software without specific prior written permission. Silicon Graphics makes no representation about the suitability of this software for any purpose. It is provided "as is" without any express or implied warranty. SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON GRAPHICS 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. ********************************************************/ /* $XFree86: xc/lib/xkbfile/xkbatom.c,v 3.8 2001/12/14 19:57:03 dawes Exp $ */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <stdio.h> #include <ctype.h> #include <stdlib.h> #include <X11/Xos.h> #include <X11/Xlib.h> #include <X11/XKBlib.h> #include "XKMformat.h" #include "XKBfileInt.h" /***====================================================================***/ #define InitialTableSize 100 typedef struct _Node { struct _Node *left, *right; Atom a; unsigned int fingerPrint; char *string; } NodeRec, *NodePtr; #define BAD_RESOURCE 0xe0000000 static Atom lastAtom = None; static NodePtr atomRoot = (NodePtr)NULL; static unsigned long tableLength; static NodePtr *nodeTable; static Atom _XkbMakeAtom(char *string,unsigned len,Bool makeit) { register NodePtr * np; unsigned i; int comp; register unsigned int fp = 0; np = &atomRoot; for (i = 0; i < (len+1)/2; i++) { fp = fp * 27 + string[i]; fp = fp * 27 + string[len - 1 - i]; } while (*np != (NodePtr) NULL) { if (fp < (*np)->fingerPrint) np = &((*np)->left); else if (fp > (*np)->fingerPrint) np = &((*np)->right); else { /* now start testing the strings */ comp = strncmp(string, (*np)->string, (int)len); if ((comp < 0) || ((comp == 0) && (len < strlen((*np)->string)))) np = &((*np)->left); else if (comp > 0) np = &((*np)->right); else return(*np)->a; } } if (makeit) { register NodePtr nd; nd = (NodePtr) _XkbAlloc(sizeof(NodeRec)); if (!nd) return BAD_RESOURCE; nd->string = (char *) _XkbAlloc(len + 1); if (!nd->string) { _XkbFree(nd); return BAD_RESOURCE; } strncpy(nd->string, string, (int)len); nd->string[len] = 0; if ((lastAtom + 1) >= tableLength) { NodePtr *table; table = (NodePtr *) _XkbRealloc(nodeTable, tableLength * (2 * sizeof(NodePtr))); if (!table) { if (nd->string != string) _XkbFree(nd->string); _XkbFree(nd); return BAD_RESOURCE; } tableLength <<= 1; nodeTable = table; } *np = nd; nd->left = nd->right = (NodePtr) NULL; nd->fingerPrint = fp; nd->a = (++lastAtom); *(nodeTable+lastAtom) = nd; return nd->a; } else return None; } static char * _XkbNameForAtom(Atom atom) { NodePtr node; if (atom > lastAtom) return 0; if ((node = nodeTable[atom]) == (NodePtr)NULL) return 0; return strdup(node->string); } static void _XkbInitAtoms(void) { tableLength = InitialTableSize; nodeTable = (NodePtr *)_XkbAlloc(InitialTableSize*sizeof(NodePtr)); nodeTable[None] = (NodePtr)NULL; } /***====================================================================***/ char * XkbAtomGetString(Display *dpy,Atom atm) { if (atm==None) return NULL; if (dpy==NULL) return _XkbNameForAtom(atm); return XGetAtomName(dpy,atm); } /***====================================================================***/ Atom XkbInternAtom(Display *dpy,char *name,Bool onlyIfExists) { if (name==NULL) return None; if (dpy==NULL) { return _XkbMakeAtom(name, strlen(name), (!onlyIfExists)); } return XInternAtom(dpy,name,onlyIfExists); } /***====================================================================***/ Atom XkbChangeAtomDisplay(Display *oldDpy,Display *newDpy,Atom atm) { char *tmp; if (atm!=None) { tmp= XkbAtomGetString(oldDpy,atm); if (tmp!=NULL) return XkbInternAtom(newDpy,tmp,False); } return None; } /***====================================================================***/ void XkbInitAtoms(Display *dpy) { static int been_here= 0; if ((dpy==NULL)&&(!been_here)) { _XkbInitAtoms(); been_here= 1; } return; }