--- ray/src/common/portio.c	1996/11/15 16:17:05	2.4
+++ ray/src/common/portio.c	2003/12/09 15:51:42	2.10
@@ -1,23 +1,27 @@
-/* Copyright (c) 1992 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: portio.c,v 2.10 2003/12/09 15:51:42 greg Exp $";
 #endif
-
 /*
  * Portable i/o for binary files
+ *
+ * External symbols declared in standard.h
  */
 
+#include "copyright.h"
+
 #include <stdio.h>
 
-#ifndef frexp
-extern double  frexp();
+#include "rtio.h"
+
+#include <math.h>
+
+#ifdef getc_unlocked		/* avoid horrendous overhead of flockfile */
+#define getc    getc_unlocked
+#define putc    putc_unlocked
 #endif
-#ifndef ldexp
-extern double  ldexp();
-#endif
 
 
+void
 putstr(s, fp)			/* write null-terminated string to fp */
 register char  *s;
 register FILE  *fp;
@@ -28,6 +32,7 @@ register FILE  *fp;
 }
 
 
+void
 putint(i, siz, fp)		/* write a siz-byte integer to fp */
 long  i;
 register int  siz;
@@ -38,6 +43,7 @@ register FILE  *fp;
 }
 
 
+void
 putflt(f, fp)			/* put out floating point number */
 double	f;
 FILE  *fp;
@@ -91,8 +97,10 @@ double
 getflt(fp)			/* get a floating point number */
 FILE  *fp;
 {
+	long	l;
 	double	d;
 
-	d = (getint(4, fp) + .5) / 0x7fffffff;
+	l = getint(4, fp);
+	d = (l + (l > 0 ? .5 : -.5)) * (1./0x7fffffff);
 	return(ldexp(d, (int)getint(1, fp)));
 }