IABSD.fr/xenocara/lib/libX11/src/ModMap.c

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• Author : matthieu
  Date : 2019-08-04 13:34:52
  Hash : a400859a
  Message : Update to libX11 1.6.8 riding the major bump caused by xtrans 1.4.0

• lib/libX11/src/ModMap.c

• /*
  
  Copyright 1986, 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.
  
  */
  
  #ifdef HAVE_CONFIG_H
  #include <config.h>
  #endif
  #include "Xlibint.h"
  #include "reallocarray.h"
  #include <limits.h>
  
  XModifierKeymap *
  XGetModifierMapping(register Display *dpy)
  {
      xGetModifierMappingReply rep;
      _X_UNUSED register xReq *req;
      unsigned long nbytes;
      XModifierKeymap *res;
  
      LockDisplay(dpy);
      GetEmptyReq(GetModifierMapping, req);
      (void) _XReply (dpy, (xReply *)&rep, 0, xFalse);
  
      if (rep.length < (INT_MAX >> 2) &&
  	(rep.length >> 1) == rep.numKeyPerModifier) {
  	nbytes = (unsigned long)rep.length << 2;
  	res = Xmalloc(sizeof (XModifierKeymap));
  	if (res)
  	    res->modifiermap = Xmalloc (nbytes);
      } else
  	res = NULL;
      if ((! res) || (! res->modifiermap)) {
  	Xfree(res);
  	res = (XModifierKeymap *) NULL;
  	_XEatDataWords(dpy, rep.length);
      } else {
  	_XReadPad(dpy, (char *) res->modifiermap, (long) nbytes);
  	res->max_keypermod = rep.numKeyPerModifier;
      }
  
      UnlockDisplay(dpy);
      SyncHandle();
      return (res);
  }
  
  /*
   *	Returns:
   *	MappingSuccess (0)	Success
   *	MappingBusy (1) 	Busy - one or more old or new modifiers are down
   *	MappingFailed (2)	Failed - one or more new modifiers unacceptable
   */
  int
  XSetModifierMapping(
      register Display *dpy,
      register XModifierKeymap *modifier_map)
  {
      register xSetModifierMappingReq *req;
      xSetModifierMappingReply rep;
      int         mapSize = modifier_map->max_keypermod << 3;	/* 8 modifiers */
  
      LockDisplay(dpy);
      GetReq(SetModifierMapping, req);
      req->length += mapSize >> 2;
      req->numKeyPerModifier = modifier_map->max_keypermod;
  
      Data(dpy, (const char *)modifier_map->modifiermap, mapSize);
  
      (void) _XReply(dpy, (xReply *) & rep,
  	(SIZEOF(xSetModifierMappingReply) - SIZEOF(xReply)) >> 2, xTrue);
      UnlockDisplay(dpy);
      SyncHandle();
      return (rep.success);
  }
  
  XModifierKeymap *
  XNewModifiermap(int keyspermodifier)
  {
      XModifierKeymap *res = Xmalloc((sizeof (XModifierKeymap)));
      if (res) {
  	res->max_keypermod = keyspermodifier;
  	res->modifiermap = (keyspermodifier > 0 ?
  			    Xmallocarray(keyspermodifier, 8)
  			    : (KeyCode *) NULL);
  	if (keyspermodifier && (res->modifiermap == NULL)) {
  	    Xfree(res);
  	    return (XModifierKeymap *) NULL;
  	}
      }
      return (res);
  }
  
  
  int
  XFreeModifiermap(XModifierKeymap *map)
  {
      if (map) {
          Xfree(map->modifiermap);
  	Xfree(map);
      }
      return 1;
  }
  
  XModifierKeymap *
  XInsertModifiermapEntry(XModifierKeymap *map,
  #if NeedWidePrototypes
  			unsigned int keycode,
  #else
  			KeyCode keycode,
  #endif
  			int modifier)
  {
      XModifierKeymap *newmap;
      int i,
  	row = modifier * map->max_keypermod,
  	newrow,
  	lastrow;
  
      for (i=0; i<map->max_keypermod; i++) {
          if (map->modifiermap[ row+i ] == keycode)
  	    return(map); /* already in the map */
          if (map->modifiermap[ row+i ] == 0) {
              map->modifiermap[ row+i ] = keycode;
  	    return(map); /* we added it without stretching the map */
  	}
      }
  
      /* stretch the map */
      if ((newmap = XNewModifiermap(map->max_keypermod+1)) == NULL)
  	return (XModifierKeymap *) NULL;
      newrow = row = 0;
      lastrow = newmap->max_keypermod * 8;
      while (newrow < lastrow) {
  	for (i=0; i<map->max_keypermod; i++)
  	    newmap->modifiermap[ newrow+i ] = map->modifiermap[ row+i ];
  	newmap->modifiermap[ newrow+i ] = 0;
  	row += map->max_keypermod;
  	newrow += newmap->max_keypermod;
      }
      (void) XFreeModifiermap(map);
      newrow = newmap->max_keypermod * modifier + newmap->max_keypermod - 1;
      newmap->modifiermap[ newrow ] = keycode;
      return(newmap);
  }
  
  XModifierKeymap *
  XDeleteModifiermapEntry(XModifierKeymap *map,
  #if NeedWidePrototypes
  			unsigned int keycode,
  #else
  			KeyCode keycode,
  #endif
  			int modifier)
  {
      int i,
  	row = modifier * map->max_keypermod;
  
      for (i=0; i<map->max_keypermod; i++) {
          if (map->modifiermap[ row+i ] == keycode)
              map->modifiermap[ row+i ] = 0;
      }
      /* should we shrink the map?? */
      return (map);
  }