--- ray/src/hd/holofile.c	1999/01/09 09:16:14	3.33
+++ ray/src/hd/holofile.c	1999/02/01 09:56:18	3.36
@@ -13,8 +13,12 @@ static char SCCSid[] = "$SunId$ SGI";
 #include "holo.h"
 
 #ifndef CACHESIZE
-#define CACHESIZE	16	/* default cache size (Mbytes, 0==inf) */
+#ifdef BIGMEM
+#define CACHESIZE	32	/* default cache size (Mbytes, 0==inf) */
+#else
+#define CACHESIZE	12
 #endif
+#endif
 #ifndef FREEBEAMS
 #define FREEBEAMS	1500	/* maximum beams to free at a time */
 #endif
@@ -554,7 +558,7 @@ int	i;
 		}
 	biglob(hp)->nrd -= bi->nrd;		/* tell fragment it's free */
 	bi->nrd = 0;
-	bi->fo = 0;
+	bi->fo = 0L;
 	return(1);
 }
 
@@ -644,7 +648,8 @@ register int	i;
 		hp->bi[i].fo = nfo;
 	} else
 		hp->bi[i].fo = 0L;
-	biglob(hp)->nrd += hp->bi[i].nrd = nrays;
+	biglob(hp)->nrd += nrays - hp->bi[i].nrd;
+	hp->bi[i].nrd = nrays;
 	markdirty(hp, i);		/* section directory now out of date */
 	return(1);
 }
@@ -666,10 +671,14 @@ register int	i;
 	if (hdfragl[hp->fd].writerr)	/* check for file error */
 		return(0);
 	if (i == 0) {			/* clear entire holodeck */
+		if (blglob(hp)->nrm == 0)
+			return(0);		/* already clear */
 		nchanged = 0;
 		for (i = nbeams(hp); i > 0; i--)
 			if (hp->bl[i] != NULL)
 				nchanged += hdfreebeam(hp, i);
+		DCHECK(blglob(hp)->nrm != 0,
+				CONSISTENCY, "bad beam count in hdfreebeam");
 		return(nchanged);
 	}
 	DCHECK(i < 1 | i > nbeams(hp),
@@ -701,7 +710,10 @@ register int	i;
 		return(nchanged);
 	}
 	if (i == 0) {			/* clobber entire holodeck */
+		if (biglob(hp)->nrd == 0 & blglob(hp)->nrm == 0)
+			return(0);		/* already empty */
 		nchanged = 0;
+		nchanged = 0;
 		for (i = nbeams(hp); i > 0; i--)
 			if (hp->bi[i].nrd > 0 || hp->bl[i] != NULL)
 				nchanged += hdkillbeam(hp, i);
@@ -719,6 +731,7 @@ register int	i;
 	if (hp->bi[i].nrd) {
 		if (hdfragflags&FF_KILL)
 			hdfreefrag(hp, i);
+		biglob(hp)->nrd -= hp->bi[i].nrd;
 		hp->bi[i].nrd = 0;	/* make sure it's gone */
 		hp->bi[i].fo = 0L;
 	}