From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Fri, 10 Apr 2020 12:30:54 +0000 (-0400)
Subject: Fix: tap array subscript has type char warning
X-Git-Tag: v0.13.0~60
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=e2b8e1f623338afb1760a8033785f4904c645c86;p=userspace-rcu.git

Fix: tap array subscript has type char warning

On architectures where "char" is signed, it should be cast to unsigned
char before being passed as parameter to isdigit or isspace. Based on
their man page:

       These  functions  check  whether  c,  which  must  have the value of an
       unsigned char or EOF, falls into a certain character class according to
       the  specified  locale.

Passing a signed char as parameter is invalid if the values fall into
the negative range of the signed char.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/tests/utils/tap.c b/tests/utils/tap.c
index 573ae33..3e384d6 100644
--- a/tests/utils/tap.c
+++ b/tests/utils/tap.c
@@ -94,7 +94,8 @@ _gen_result(int ok, const char *func, char *file, unsigned int line,
 		if(local_test_name) {
 			name_is_digits = 1;
 			for(c = local_test_name; *c != '\0'; c++) {
-				if(!isdigit(*c) && !isspace(*c)) {
+				if(!isdigit((unsigned char)*c) &&
+						!isspace((unsigned char)*c)) {
 					name_is_digits = 0;
 					break;
 				}