1 files changed, 27 insertions, 0 deletions
diff --git a/src/lib-mail/message-header-encode.h b/src/lib-mail/message-header-encode.h
new file mode 100644
index 0000000..fdd3b19
--- /dev/null
+++ b/src/lib-mail/message-header-encode.h
@@ -0,0 +1,27 @@
+#ifndef MESSAGE_HEADER_ENCODE_H
+#define MESSAGE_HEADER_ENCODE_H
+
+/* Encode UTF-8 input into output wherever necessary using either Q or B
+   encoding depending on which takes less space (approximately). The encoded
+   output is split into multiple lines if necessary (max 76 chars/line).
+   Existing folding whitespace is preserved. Bare [CR]LF will be preserved by
+   adding a TAB after it to make it a valid folding whitespace. All the control
+   characters are encoded, including NUL, CR and LF. Sequences of one or more
+   invalid UTF-8 characters are replaced by a single Unicode replacement
+   character (U+fffd). */
+void message_header_encode(const char *input, string_t *output);
+void message_header_encode_data(const unsigned char *input, size_t len,
+				string_t *output);
+
+/* Encode the whole UTF-8 input using "Q" or "B" encoding into output.
+   The output is split into multiple lines if necessary (max 76 chars/line).
+   The first line's length is given as parameter. All the control characters
+   are encoded, including NUL, CR and LF. Sequences of one or more invalid UTF-8
+   characters are replaced by a single Unicode replacement character (U+fffd).
+ */
+void message_header_encode_q(const unsigned char *input, size_t len,
+			     string_t *output, size_t first_line_len);
+void message_header_encode_b(const unsigned char *input, size_t len,
+			     string_t *output, size_t first_line_len);
+
+#endif