1 files changed, 12 insertions, 0 deletions
diff --git a/include/entropy.h b/include/entropy.h
new file mode 100644
index 0000000..e246682
--- /dev/null
+++ b/include/entropy.h
@@ -0,0 +1,12 @@
+#include <stddef.h>
+
+#pragma once
+
+typedef struct entropy_ctx {
+	size_t  freq[256];
+	size_t  total_bytes;
+} entropy_ctx;
+
+void entropy_init(entropy_ctx *ctx);
+void entropy_update(entropy_ctx *ctx, const unsigned char *buf, size_t len);
+double entropy_final(entropy_ctx *ctx);