--- ray/src/common/header.c	2020/07/25 01:10:38	2.40
+++ ray/src/common/header.c	2022/03/03 15:43:04	2.42
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: header.c,v 2.40 2020/07/25 01:10:38 greg Exp $";
+static const char	RCSid[] = "$Id: header.c,v 2.42 2022/03/03 15:43:04 greg Exp $";
 #endif
 /*
  *  header.c - routines for reading and writing information headers.
@@ -57,7 +57,7 @@ newheader(		/* identifying line of information header 
 {
 	fputs(HDRSTR, fp);
 	fputs(s, fp);
-	putc('\n', fp);
+	fputc('\n', fp);
 }
 
 
@@ -209,9 +209,29 @@ fputformat(		/* put out a format value */
 	FILE  *fp
 )
 {
+	int	align = 0;
+
 	fputs(FMTSTR, fp);
 	fputs(s, fp);
-	putc('\n', fp);
+			/* pad to align binary type for mmap() */
+	if (!strncmp(s, "16-bit", 6))
+		align = 2;
+	else if (!strcmp(s, "float") || !strncmp(s, "32-bit", 6))
+		align = 4;
+	else if (!strcmp(s, "double") || !strncmp(s, "64-bit", 6))
+		align = 8;
+	if (align) {
+		long	pos = ftell(fp);
+		if (pos >= 0) {
+			pos = (pos + 2) % align;
+			if (pos) align -= pos;
+			else align = 0;
+		} else
+			align = 0;
+	}
+	while (align-- > 0)
+		putc(' ', fp);
+	fputc('\n', fp);
 }