1 files changed, 21 insertions, 0 deletions
diff --git a/behex_lower.c b/behex_lower.c
new file mode 100644
index 0000000..c69eaa0
--- /dev/null
+++ b/behex_lower.c
@@ -0,0 +1,21 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * Convert a binary hashsum to lower case hexadecimal representation
+ * 
+ * @param  output   Output array, should have an allocation size of at least `2 * n + 1`
+ * @param  hashsum  The hashsum to convert
+ * @param  n        The size of `hashsum`
+ */
+void
+libsha1_behex_lower(char *restrict output, const void *restrict hashsum_, size_t n)
+{
+	const unsigned char *restrict hashsum = hashsum_;
+	output[2 * n] = '\0';
+	while (n--) {
+		output[2 * n + 0] = "0123456789abcdef"[(hashsum[n] >> 4) & 15];
+		output[2 * n + 1] = "0123456789abcdef"[(hashsum[n] >> 0) & 15];
+	}
+}