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/* Last non-groff version: hpoint.c 1.1 84/10/08 */
/*
* This file contains routines for manipulating the point data structures
* for the gremlin picture editor.
*/
#include <stdlib.h>
#include "gprint.h"
/*
* Return pointer to empty point list.
*/
POINT *
PTInit()
{
return ((POINT *) NULL);
}
/*
* This routine creates a new point with coordinates x and y and links it
* into the pointlist.
*/
POINT *
PTMakePoint(float x,
float y,
POINT **pplist)
{
register POINT *pt;
if (Nullpoint(pt = *pplist)) { /* empty list */
*pplist = (POINT *) malloc(sizeof(POINT));
pt = *pplist;
} else {
while (!Nullpoint(pt->nextpt))
pt = pt->nextpt;
pt->nextpt = (POINT *) malloc(sizeof(POINT));
pt = pt->nextpt;
}
pt->x = x;
pt->y = y;
pt->nextpt = PTInit();
return (pt);
} /* end PTMakePoint */
/* EOF */
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