common: Make case conversion locale independent

The tolower()/toupper() functions take into account of the current
locale settings, which p11-kit doesn't want.  Add replacement
functions that work as if they are called under the C locale.

1 files changed, 16 insertions, 0 deletions

diff --git a/common/compat.c b/common/compat.c
index 1e17230..2e559c7 100644
--- a/common/compat.c
+++ b/common/compat.c
@@ -953,3 +953,19 @@ fdwalk (int (* cb) (void *data, int fd),
 #endif /* HAVE_FDWALK */
 
 #endif /* OS_UNIX */
+
+int
+p11_ascii_tolower (int c)
+{
+	if (c >= 'A' && c <= 'Z')
+		return 'a' + (c - 'A');
+	return c;
+}
+
+int
+p11_ascii_toupper (int c)
+{
+	if (c >= 'a' && c <= 'z')
+		return 'A' + (c - 'a');
+	return c;
+}