Use valid ctype range now.

Includes cleanup
Misc. cleanup
Use absolute path in rot13 wrapper.

games/caesar/Makefile

@@ -6,6 +6,8 @@ DPADD=	${LIBM}
 LDADD=	-lm
 MLINKS=	caesar.6 rot13.6
 
+CFLAGS+= -Wall
+
 beforeinstall:
 	${INSTALL} -c -o ${BINOWN} -g ${BINGRP} -m ${BINMODE} \
 	    ${.CURDIR}/rot13.sh ${DESTDIR}/usr/games/rot13

games/caesar/caesar.6

@@ -49,7 +49,7 @@ statistics.
 reads from the standard input and writes to the standard output.
 .Pp
 The optional numerical argument
-Ar rotation
+.Ar rotation
 may be used to specify a specific rotation value.
 .Pp
 The frequency (from most common to least) of English letters is as follows:

games/caesar/caesar.c

@@ -40,24 +40,28 @@
  */
 
 #ifndef lint
-static char copyright[] =
+static const char copyright[] =
 "@(#) Copyright (c) 1989, 1993\n\
 	The Regents of the University of California.  All rights reserved.\n";
 #endif /* not lint */
 
 #ifndef lint
-static char sccsid[] = "@(#)caesar.c	8.1 (Berkeley) 5/31/93";
+static const char sccsid[] = "@(#)caesar.c    8.1 (Berkeley) 5/31/93";
 #endif /* not lint */
 
+#include <errno.h>
 #include <math.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <ctype.h>
 #include <unistd.h>
 
 #define	LINELENGTH	2048
 #define	ROTATE(ch, perm) \
+     isascii(ch) ? ( \
 	isupper(ch) ? ('A' + (ch - 'A' + perm) % 26) : \
-	    islower(ch) ? ('a' + (ch - 'a' + perm) % 26) : ch
+	    islower(ch) ? ('a' + (ch - 'a' + perm) % 26) : ch) : ch
 
 /*
  * letter frequencies (taken from some unix(tm) documentation)
@@ -69,15 +73,15 @@ double stdf[26] = {
 	2.62, 0.81, 1.88, 0.23,  2.07, 0.06,
 };
 
-main(argc, argv)
+void printit();
+
+void main(argc, argv)
 	int argc;
 	char **argv;
 {
-	extern int errno;
-	register int ch, dot, i, nread, winnerdot;
+	register int ch, dot, i, nread, winnerdot = 0;
 	register char *inbuf;
 	int obs[26], try, winner;
-	char *malloc(), *strerror();
 
 	if (argc > 1)
 		printit(argv[1]);
@@ -99,11 +103,13 @@ main(argc, argv)
 		exit(1);
 	}
 	for (i = nread; i--;) {
-		ch = inbuf[i];
-		if (islower(ch))
-			++obs[ch - 'a'];
-		else if (isupper(ch))
-			++obs[ch - 'A'];
+		ch = (unsigned char) inbuf[i];
+		if (isascii(ch)) {
+			if (islower(ch))
+				++obs[ch - 'a'];
+			else if (isupper(ch))
+				++obs[ch - 'A'];
+		}
 	}
 
 	/*
@@ -126,7 +132,7 @@ main(argc, argv)
 
 	for (;;) {
 		for (i = 0; i < nread; ++i) {
-			ch = inbuf[i];
+			ch = (unsigned char) inbuf[i];
 			putchar(ROTATE(ch, winner));
 		}
 		if (nread < LINELENGTH)
@@ -139,7 +145,7 @@ main(argc, argv)
 	exit(0);
 }
 
-printit(arg)
+void printit(arg)
 	char *arg;
 {
 	register int ch, rot;

games/caesar/rot13.sh

@@ -34,4 +34,4 @@
 #	@(#)rot13.sh	8.1 (Berkeley) 5/31/93
 #
 
-caesar 13 $*
+/usr/games/caesar 13 $*