[Feature] Add mime encoding manipulation routines

1 files changed, 62 insertions, 0 deletions

diff --git a/src/libmime/mime_encoding.h b/src/libmime/mime_encoding.h
new file mode 100644
index 000000000..9c0975406
--- /dev/null
+++ b/src/libmime/mime_encoding.h
@@ -0,0 +1,62 @@
+/*-
+ * Copyright 2016 Vsevolod Stakhov
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef SRC_LIBMIME_MIME_ENCODING_H_
+#define SRC_LIBMIME_MIME_ENCODING_H_
+
+#include "config.h"
+#include "mem_pool.h"
+
+struct rspamd_task;
+struct rspamd_mime_part;
+struct rspamd_mime_text_part;
+
+/**
+ * Convert charset to a valid iconv charset
+ * @param pool pool to store temporary data
+ * @param in
+ * @return
+ */
+const gchar * rspamd_mime_detect_charset (rspamd_mempool_t *pool,
+		const rspamd_ftok_t *in);
+
+/**
+ * Convert text chunk to utf-8. Input encoding is substituted using
+ * `rspamd_mime_detect_charset`.
+ * If input encoding is already utf, this function returns input pointer.
+ * Memory is allocated from pool if a conversion is needed
+ * @param pool
+ * @param input
+ * @param len
+ * @param in_enc
+ * @param olen
+ * @param err
+ * @return
+ */
+gchar * rspamd_mime_text_to_utf8 (rspamd_mempool_t *pool,
+		gchar *input, gsize len, const gchar *in_enc,
+		gsize *olen, GError **err);
+
+/**
+ * Maybe convert part to utf-8
+ * @param task
+ * @param text_part
+ * @return
+ */
+GByteArray * rspamd_mime_text_part_maybe_convert (struct rspamd_task *task,
+		struct rspamd_mime_text_part *text_part);
+
+
+#endif /* SRC_LIBMIME_MIME_ENCODING_H_ */