From: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Date: Fri, 11 Apr 2025 09:00:42 +0000 (+0200)
Subject: tools/nolibc: add tolower() and toupper()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=9b070d97d9e52195c3a2ee084fdd7c45b6b35adf;p=users%2Fdwmw2%2Flinux.git

tools/nolibc: add tolower() and toupper()

The kselftest harness uses these functions.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
---

diff --git a/tools/include/nolibc/string.h b/tools/include/nolibc/string.h
index ba84ab700e300..f0d335f0e467e 100644
--- a/tools/include/nolibc/string.h
+++ b/tools/include/nolibc/string.h
@@ -289,6 +289,23 @@ char *strrchr(const char *s, int c)
 	return (char *)ret;
 }
 
+static __attribute__((unused))
+int tolower(int c)
+{
+	if (c >= 'A' && c <= 'Z')
+		return c - 'A' + 'a';
+	return c;
+}
+
+static __attribute__((unused))
+int toupper(int c)
+{
+	if (c >= 'a' && c <= 'z')
+		return c - 'a' + 'A';
+	return c;
+}
+
+
 /* make sure to include all global symbols */
 #include "nolibc.h"
 
diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index 143dddfcd01a4..b6f736fdeadf3 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -39,6 +39,7 @@
 #include <stdint.h>
 #include <unistd.h>
 #include <limits.h>
+#include <ctype.h>
 #endif
 #endif
 
@@ -1280,6 +1281,10 @@ int run_stdlib(int min, int max)
 		CASE_TEST(strerror_EINVAL);         EXPECT_STREQ(is_nolibc, strerror(EINVAL), "errno=22"); break;
 		CASE_TEST(strerror_int_max);        EXPECT_STREQ(is_nolibc, strerror(INT_MAX), "errno=2147483647"); break;
 		CASE_TEST(strerror_int_min);        EXPECT_STREQ(is_nolibc, strerror(INT_MIN), "errno=-2147483648"); break;
+		CASE_TEST(tolower);                 EXPECT_EQ(1, tolower('A'), 'a'); break;
+		CASE_TEST(tolower_noop);            EXPECT_EQ(1, tolower('a'), 'a'); break;
+		CASE_TEST(toupper);                 EXPECT_EQ(1, toupper('a'), 'A'); break;
+		CASE_TEST(toupper_noop);            EXPECT_EQ(1, toupper('A'), 'A'); break;
 
 		case __LINE__:
 			return ret; /* must be last */