dtextract.c revision 3f54fd611f536639ec30dd53c48e5ec1897cc7d9
/***********************************************************************
* *
* This software is part of the BSD package *
*Copyright (c) 1978-1996 The Regents of the University of California an*
* *
* Redistribution and use in source and binary forms, with or *
* without modification, are permitted provided that the following *
* conditions are met: *
* *
* 1. Redistributions of source code must retain the above *
* copyright notice, this list of conditions and the *
* following disclaimer. *
* *
* 2. Redistributions in binary form must reproduce the above *
* copyright notice, this list of conditions and the *
* following disclaimer in the documentation and/or other *
* materials provided with the distribution. *
* *
* 3. Neither the name of The Regents of the University of California*
* names of its contributors may be used to endorse or *
* promote products derived from this software without *
* specific prior written permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND *
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, *
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF *
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE *
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS *
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED *
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, *
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON *
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, *
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY *
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE *
* POSSIBILITY OF SUCH DAMAGE. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* 1. Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* 2. Redistributions in binary form must reproduce the above copyright *
* notice, this list of conditions and the following disclaimer in *
* the documentation and/or other materials provided with the *
* distribution. *
* 3. Neither the name of the University nor the names of its *
* contributors may be used to endorse or promote products derived *
* from this software without specific prior written permission. *
* *
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" *
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS *
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, *
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT *
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF *
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND *
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, *
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT *
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF *
* SUCH DAMAGE. *
* *
* Kurt Shoens (UCB) *
* gsf *
* *
***********************************************************************/
#include "dthdr.h"
/* Extract objects of a dictionary.
**
** Written by Kiem-Phong Vo (7/15/95).
*/
#if __STD_C
Dtlink_t* dtextract(reg Dt_t* dt)
#else
Dtlink_t* dtextract(dt)
reg Dt_t* dt;
#endif
{
reg Dtlink_t *t, *last, *list, **slot, **eslot;
UNFLATTEN(dt);
if(dt->data->type&DT_TREE)
list = dt->data->here;
else if(dt->data->type&DT_HASH) /* make a big list of everything */
{ list = last = NIL(Dtlink_t*);
eslot = (slot = dt->data->htab) + dt->data->ntab;
for(; slot < eslot; ++slot)
{ if(!(t = *slot) )
continue;
*slot = NIL(Dtlink_t*);
if(last)
last->right = t;
else list = last = t;
while((t = last->right) )
last = t;
}
}
else /*if(dt->data->type&(DT_LIST|DT_STACK|DT_QUEUE))*/
{ list = dt->data->head;
dt->data->head = NIL(Dtlink_t*);
}
dt->data->size = 0;
dt->data->here = NIL(Dtlink_t*);
return list;
}