From fbc4b11da543753b3b803e5546f56e26ec90c2a7 Mon Sep 17 00:00:00 2001
From: Mark Wielaard <mjw@redhat.com>
Date: Tue, 9 Apr 2024 21:11:02 +0200
Subject: Make sure to call isdigit and isspace with unsigned char

Casting to Int32 or int could create negative values. Which isspace
and isdigit don't handle. SEI CERT C Coding Standard STR37-C.

Resolve by casting to UChar or unsigned char instead of Int32 or int.

https://sourceware.org/bugzilla/show_bug.cgi?id=28283
---
 bzlib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'bzlib.c')

diff --git a/bzlib.c b/bzlib.c
index 2178655..100873c 100644
--- a/bzlib.c
+++ b/bzlib.c
@@ -1408,7 +1408,7 @@ BZFILE * bzopen_or_bzdopen
       case 's':
          smallMode = 1; break;
       default:
-         if (isdigit((int)(*mode))) {
+         if (isdigit((unsigned char)(*mode))) {
             blockSize100k = *mode-BZ_HDR_0;
          }
       }
-- 
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