--- ray/src/util/rcrop.c	2022/03/16 15:50:24	1.10
+++ ray/src/util/rcrop.c	2022/04/07 16:58:30	1.13
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: rcrop.c,v 1.10 2022/03/16 15:50:24 greg Exp $";
+static const char RCSid[] = "$Id: rcrop.c,v 1.13 2022/04/07 16:58:30 greg Exp $";
 #endif
 /*
  * rcrop.c - crop a Radiance picture or matrix data
@@ -12,8 +12,6 @@ static const char RCSid[] = "$Id: rcrop.c,v 1.10 2022/
 #include "fvect.h"
 #include "view.h"
 
-#define MAXWORD		64	/* maximum word (number) length */
-
 char	*progname;		/* global argv[0] */
 
 VIEW	vw = STDVIEW;
@@ -100,9 +98,11 @@ binary_copyf(FILE *fp, int asize)
 					/* check if fseek() useful */
 	if (skip_len > skip_thresh &&
 			fseek(fp, (rmin*width + cmin)*elsiz, SEEK_CUR) == 0) {
+		off_t	curpos;
 		buf = (char *)malloc(ncols*elsiz);
 		if (!buf)
 			goto memerr;
+#ifdef NON_POSIX
 		for (y = nrows; y-- > 0; ) {
 			if (getbinary(buf, elsiz, ncols, fp) != ncols)
 				goto readerr;
@@ -114,8 +114,20 @@ binary_copyf(FILE *fp, int asize)
 				return(0);
 			}
 		}
-		free(buf);		/* success! */
-		return(1);
+#else
+		curpos = ftello(fp);
+		for (y = nrows; y-- > 0; curpos += width*elsiz) {
+			if (pread(fileno(fp), buf, ncols*elsiz,
+						curpos) != ncols*elsiz)
+				goto readerr;
+			if (putbinary(buf, elsiz, ncols, stdout) != ncols)
+				goto writerr;
+		}
+#endif
+		free(buf);
+		if (fflush(stdout) == EOF)
+			goto writerr;
+		return(1);		/* success! */
 	}				/* else need to read it all... */
 	buf = (char *)malloc(width*elsiz);
 	if (!buf)
@@ -226,14 +238,15 @@ adjust_view(void)
 		p1[1] = 1. - p1[1];
 	}
 	err = cropview(&vw, p0[0], p0[1], p1[0], p1[1]);
-	if (err) {
-		fputs(progname, stderr);
-		fputs(": view error - ", stderr);
-		fputs(err, stderr);
-		fputc('\n', stderr);
-		return(0);
-	}
-	return(1);
+
+	if (!err)
+		return(1);	/* success! */
+
+	fputs(progname, stderr);
+	fputs(": view error - ", stderr);
+	fputs(err, stderr);
+	fputc('\n', stderr);
+	return(0);		/* something went wrong */
 }