--- ray/src/px/psum.c	1991/12/19 14:52:02	2.2
+++ ray/src/px/psum.c	2004/01/02 12:47:01	2.7
@@ -1,9 +1,6 @@
-/* Copyright (c) 1986 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: psum.c,v 2.7 2004/01/02 12:47:01 schorsch Exp $";
 #endif
-
 /*
  *  psum.c - program to sum pictures.
  *
@@ -11,8 +8,11 @@ static char SCCSid[] = "$SunId$ LBL";
  */
 
 #include  <stdio.h>
+#include  <math.h>
 
 #include  "color.h"
+#include  "resolu.h"
+#include  "rterror.h"
 
 
 #define  MAXFILE	8
@@ -26,12 +26,17 @@ FILE  *fptr[MAXFILE];			/* the file pointers */
 COLOR  scale[MAXFILE];			/* scaling factors */
 int  nfile;				/* number of files */
 
+static gethfunc tabputs;
 
-tabputs(s)			/* print line preceded by a tab */
-char  *s;
+
+static int
+tabputs(			/* print line preceded by a tab */
+	char	*s,
+	void	*p
+)
 {
 	putc('\t', stdout);
-	fputs(s, stdout);
+	return(fputs(s, stdout));
 }
 
 
@@ -94,7 +99,7 @@ char  *argv[];
 						/* get header */
 		fputs(fname[nfile], stdout);
 		fputs(":\n", stdout);
-		getheader(fptr[nfile], tabputs);
+		getheader(fptr[nfile], tabputs, NULL);
 						/* get picture size */
 		if (fgetresolu(&xres, &yres, fptr[nfile]) != (YMAJOR|YDECR)) {
 			fprintf(stderr, "%s: bad picture size\n", progname);
@@ -152,11 +157,12 @@ psum()				/* sum the files */
 			quit(1);
 		}
 	}
-	free((char *)scanin);
-	free((char *)scanout);
+	free((void *)scanin);
+	free((void *)scanout);
 }
 
 
+void
 quit(code)		/* exit gracefully */
 int  code;
 {