1 files changed, 18 insertions, 0 deletions
diff --git a/src/lib-mail/message-header-hash.h b/src/lib-mail/message-header-hash.h
new file mode 100644
index 0000000..633d0c1
--- /dev/null
+++ b/src/lib-mail/message-header-hash.h
@@ -0,0 +1,18 @@
+#ifndef MESSAGE_HEADER_HASH_H
+#define MESSAGE_HEADER_HASH_H
+
+#define MESSAGE_HEADER_HASH_MAX_VERSION 4
+
+struct hash_method;
+
+struct message_header_hash_context {
+	bool prev_was_questionmark;
+};
+
+/* Initialize ctx with zeros. */
+void message_header_hash_more(struct message_header_hash_context *ctx,
+			      const struct hash_method *method, void *context,
+			      unsigned int version,
+			      const unsigned char *data, size_t size);
+
+#endif