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/* $Id: pointset.c,v 1.2 2005/02/24 00:57:33 ellson Exp $ $Revision: 1.2 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2004 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
#include <pointset.h>
typedef struct {
Dtlink_t link;
point id;
} pair;
static pair *mkPair(point p)
{
pair *pp;
pp = NEW(pair);
pp->id = p;
return pp;
}
static int cmppair(Dt_t * d, point * key1, point * key2, Dtdisc_t * disc)
{
if (key1->x > key2->x)
return 1;
else if (key1->x < key2->x)
return -1;
else if (key1->y > key2->y)
return 1;
else if (key1->y < key2->y)
return -1;
else
return 0;
}
Dtdisc_t intPairDisc = {
offsetof(pair, id),
sizeof(point),
offsetof(pair, link),
0,
0,
(Dtcompar_f) cmppair,
0,
0,
0
};
PointSet *newPS(void)
{
return (dtopen(&intPairDisc, Dtoset));
}
void freePS(PointSet * ps)
{
dtclose(ps);
}
void insertPS(PointSet * ps, point pt)
{
dtinsert(ps, mkPair(pt));
}
void addPS(PointSet * ps, int x, int y)
{
point pt;
pt.x = x;
pt.y = y;
dtinsert(ps, mkPair(pt));
}
int inPS(PointSet * ps, point pt)
{
pair p;
p.id = pt;
return ((dtsearch(ps, &p)) ? 1 : 0);
}
int isInPS(PointSet * ps, int x, int y)
{
pair p;
p.id.x = x;
p.id.y = y;
return ((dtsearch(ps, &p)) ? 1 : 0);
}
int sizeOf(PointSet * ps)
{
return dtsize(ps);
}
point *pointsOf(PointSet * ps)
{
int n = dtsize(ps);
point *pts = N_NEW(n, point);
pair *p;
point *pp = pts;
for (p = (pair *) dtflatten(ps); p;
p = (pair *) dtlink(ps, (Dtlink_t *) p)) {
*pp++ = p->id;
}
return pts;
}
typedef struct {
Dtlink_t link;
point id;
int v;
} mpair;
typedef struct {
Dtdisc_t disc;
mpair *flist;
} MPairDisc;
static mpair *mkMPair(Dt_t * d, mpair * obj, MPairDisc * disc)
{
mpair *ap = GNEW(mpair);
if (disc->flist) {
ap = disc->flist;
disc->flist = (mpair *) (ap->link.right);
} else
ap = GNEW(mpair);
ap->id = obj->id;
ap->v = obj->v;
return ap;
}
static void freeMPair(Dt_t * d, mpair * ap, MPairDisc * disc)
{
ap->link.right = (Dtlink_t *) (disc->flist);
disc->flist = ap;
}
Dtdisc_t intMPairDisc = {
offsetof(mpair, id),
sizeof(point),
offsetof(mpair, link),
(Dtmake_f) mkMPair,
(Dtfree_f) freeMPair,
(Dtcompar_f) cmppair,
0,
0,
0
};
PointMap *newPM(void)
{
MPairDisc *dp = GNEW(MPairDisc);
dp->disc = intMPairDisc;
dp->flist = 0;
return (dtopen(&(dp->disc), Dtoset));
}
void clearPM(PointMap * ps)
{
dtclear(ps);
}
void freePM(PointMap * ps)
{
MPairDisc *dp = (MPairDisc *) (ps->disc);
mpair *p;
mpair *next;
for (p = dp->flist; p; p = next) {
next = (mpair *) (p->link.right);
free(p);
}
dtclose(ps);
free(dp);
}
int insertPM(PointMap * pm, int x, int y, int v)
{
mpair *p;
mpair dummy;
dummy.id.x = x;
dummy.id.y = y;
dummy.v = v;
p = dtinsert(pm, &dummy);
return p->v;
}
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