1 files changed, 54 insertions, 0 deletions
diff --git a/src/lib-mail/message-decoder.h b/src/lib-mail/message-decoder.h
new file mode 100644
index 0000000..9928ae6
--- /dev/null
+++ b/src/lib-mail/message-decoder.h
@@ -0,0 +1,54 @@
+#ifndef MESSAGE_DECODER_H
+#define MESSAGE_DECODER_H
+
+#include "unichar.h"
+
+struct message_header_line;
+
+enum message_cte {
+	MESSAGE_CTE_UNKNOWN = 0,
+	MESSAGE_CTE_78BIT,
+	MESSAGE_CTE_BINARY,
+	MESSAGE_CTE_QP,
+	MESSAGE_CTE_BASE64
+};
+
+enum message_decoder_flags {
+	/* Return binary MIME parts as-is without any conversion. */
+	MESSAGE_DECODER_FLAG_RETURN_BINARY	= 0x02
+};
+
+struct message_block;
+
+/* Decode message's contents as UTF-8, both the headers and the MIME bodies.
+   The bodies are decoded from quoted-printable and base64 formats if needed. */
+struct message_decoder_context *
+message_decoder_init(normalizer_func_t *normalizer,
+		     enum message_decoder_flags flags);
+void message_decoder_deinit(struct message_decoder_context **ctx);
+
+/* Change the MESSAGE_DECODER_FLAG_RETURN_BINARY flag */
+void message_decoder_set_return_binary(struct message_decoder_context *ctx,
+				       bool set);
+
+/* Decode input and return decoded output. Headers are returned only in their
+   full multiline forms.
+
+   Returns TRUE if output is given, FALSE if more data is needed. If the input
+   ends in a partial character, it's returned in the next output. */
+bool message_decoder_decode_next_block(struct message_decoder_context *ctx,
+				       struct message_block *input,
+				       struct message_block *output);
+
+/* Returns the parsed Content-Type of the current MIME part. If there is no
+   explicit Content-Type, returns NULL. */
+const char *
+message_decoder_current_content_type(struct message_decoder_context *ctx);
+
+/* Call whenever message changes */
+void message_decoder_decode_reset(struct message_decoder_context *ctx);
+
+/* Decode Content-Transfer-Encoding header. */
+enum message_cte message_decoder_parse_cte(const struct message_header_line *hdr);
+
+#endif