1 files changed, 44 insertions, 0 deletions
diff --git a/src/lib-mail/message-binary-part.c b/src/lib-mail/message-binary-part.c
new file mode 100644
index 0000000..20416ff
--- /dev/null
+++ b/src/lib-mail/message-binary-part.c
@@ -0,0 +1,44 @@
+/* Copyright (c) 2013-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "numpack.h"
+#include "message-binary-part.h"
+
+void message_binary_part_serialize(const struct message_binary_part *parts,
+				   buffer_t *dest)
+{
+	const struct message_binary_part *part;
+
+	for (part = parts; part != NULL; part = part->next) {
+		numpack_encode(dest, part->physical_pos);
+		numpack_encode(dest, part->binary_hdr_size);
+		numpack_encode(dest, part->binary_body_size);
+		numpack_encode(dest, part->binary_body_lines_count);
+	}
+}
+
+int message_binary_part_deserialize(pool_t pool, const void *data, size_t size,
+				    struct message_binary_part **parts_r)
+{
+	const uint8_t *p = data, *end = p + size;
+	uint64_t n1, n2, n3, n4;
+	struct message_binary_part *part = NULL, *prev_part = NULL;
+
+	while (p != end) {
+		part = p_new(pool, struct message_binary_part, 1);
+		part->next = prev_part;
+		prev_part = part;
+		if (numpack_decode(&p, end, &n1) < 0 ||
+		    numpack_decode(&p, end, &n2) < 0 ||
+		    numpack_decode(&p, end, &n3) < 0 ||
+		    numpack_decode(&p, end, &n4) < 0 ||
+		    n4 > UINT_MAX)
+			return -1;
+		part->physical_pos = n1;
+		part->binary_hdr_size = n2;
+		part->binary_body_size = n3;
+		part->binary_body_lines_count = n4;
+	}
+	*parts_r = part;
+	return 0;
+}