Don't declare variables as "unsigned char *" that are passed to

functions that take "char *" arguments.  Where such chars are
assigned to int or passed to ctype functions, explicitly cast them
to unsigned char.

For OpenBSD's clang, -Wpointer-sign has been disabled by default,
but when the parse.y code was built elsewhere, the compiler would
complain.

With help from millert@
ok benno@ deraadt@

1 files changed, 12 insertions, 12 deletions

diff --git a/bin/chio/parse.y b/bin/chio/parse.y
index 9e0d2ae2ab9..ae83be9a6d9 100644
--- a/bin/chio/parse.y
+++ b/bin/chio/parse.y
@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.23 2020/10/15 19:42:56 naddy Exp $ */
+/*	$OpenBSD: parse.y,v 1.24 2021/10/15 15:01:27 naddy Exp $ */
 
 /*
  * Copyright (c) 2006 Bob Beck <beck@openbsd.org>
@@ -179,9 +179,9 @@ lookup(char *s)
 
 #define MAXPUSHBACK	128
 
-u_char	*parsebuf;
+char	*parsebuf;
 int	 parseindex;
-u_char	 pushback_buffer[MAXPUSHBACK];
+char	 pushback_buffer[MAXPUSHBACK];
 int	 pushback_index = 0;
 
 int
@@ -192,7 +192,7 @@ lgetc(int quotec)
 	if (parsebuf) {
 		/* Read character from the parsebuffer instead of input. */
 		if (parseindex >= 0) {
-			c = parsebuf[parseindex++];
+			c = (unsigned char)parsebuf[parseindex++];
 			if (c != '\0')
 				return (c);
 			parsebuf = NULL;
@@ -201,7 +201,7 @@ lgetc(int quotec)
 	}
 
 	if (pushback_index)
-		return (pushback_buffer[--pushback_index]);
+		return ((unsigned char)pushback_buffer[--pushback_index]);
 
 	if (quotec) {
 		if ((c = getc(file->stream)) == EOF) {
@@ -242,10 +242,10 @@ lungetc(int c)
 		if (parseindex >= 0)
 			return (c);
 	}
-	if (pushback_index < MAXPUSHBACK-1)
-		return (pushback_buffer[pushback_index++] = c);
-	else
+	if (pushback_index + 1 >= MAXPUSHBACK)
 		return (EOF);
+	pushback_buffer[pushback_index++] = c;
+	return (c);
 }
 
 int
@@ -272,8 +272,8 @@ findeol(void)
 int
 yylex(void)
 {
-	u_char	 buf[8096];
-	u_char	*p;
+	char	 buf[8096];
+	char	*p;
 	int	 quotec, next, c;
 	int	 token;
 
@@ -353,8 +353,8 @@ yylex(void)
 		} else {
 nodigits:
 			while (p > buf + 1)
-				lungetc(*--p);
-			c = *--p;
+				lungetc((unsigned char)*--p);
+			c = (unsigned char)*--p;
 			if (c == '-')
 				return (c);
 		}