1 files changed, 33 insertions, 0 deletions
diff --git a/libgamma_behex_edid_lowercase.c b/libgamma_behex_edid_lowercase.c
new file mode 100644
index 0000000..9c4f04e
--- /dev/null
+++ b/libgamma_behex_edid_lowercase.c
@@ -0,0 +1,33 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * Convert a raw representation of an EDID to a lowercase hexadecimal representation
+ * 
+ * @param   edid    The EDID in raw representation
+ * @param   length  The length of `edid`
+ * @return          The EDID in lowercase hexadecimal representation,
+ *                  `NULL` on allocation error, `errno` will be set accordingly
+ */
+char *
+libgamma_behex_edid_lowercase(const unsigned char *restrict edid, size_t length)
+{
+	char *restrict out;
+	size_t i;
+
+	/* Allocate memory area for the output string */
+	out = malloc((length * 2 + 1) * sizeof(char));
+	if (!out)
+		return NULL;
+
+	/* Translate from raw octets to hexadecimal */
+	for (i = 0; i < length; i++) {
+		out[i * 2 + 0] = "0123456789abcdef"[(edid[i] >> 4) & 15];
+		out[i * 2 + 1] = "0123456789abcdef"[(edid[i] >> 0) & 15];
+	}
+	/* NUL-terminate the output string */
+	out[length * 2] = '\0';
+
+	return out;
+}