1 files changed, 72 insertions, 0 deletions
diff --git a/src/lib-fts/fts-language.h b/src/lib-fts/fts-language.h
new file mode 100644
index 0000000..884998f
--- /dev/null
+++ b/src/lib-fts/fts-language.h
@@ -0,0 +1,72 @@
+#ifndef FTS_LANGUAGE_H
+#define FTS_LANGUAGE_H
+
+struct fts_language_list;
+
+enum fts_language_result {
+	/* Provided sample is too short. */
+	FTS_LANGUAGE_RESULT_SHORT,
+	/* Language is unknown or not in the provided list . */
+	FTS_LANGUAGE_RESULT_UNKNOWN,
+
+	FTS_LANGUAGE_RESULT_OK,
+	/* textcat library initialization failed. */
+	FTS_LANGUAGE_RESULT_ERROR
+};
+
+struct fts_language {
+	/* Two-letter language name lowercased, e.g. "en" */
+	const char *name;
+};
+ARRAY_DEFINE_TYPE(fts_language, const struct fts_language *);
+
+/* Used for raw data that is indexed. This data shouldn't go through any
+   language-specific filters. */
+extern const struct fts_language fts_language_data;
+
+/*
+  Language module API.
+*/
+void fts_languages_init(void);
+void fts_languages_deinit(void);
+/* Add a language to the list of supported languages. */
+void fts_language_register(const char *name);
+/* Find a specified language by name. This finds from the internal list of
+   supported languages. */
+const struct fts_language *fts_language_find(const char *name);
+
+/*
+  Language list API
+*/
+int fts_language_list_init(const char *const *settings,
+			   struct fts_language_list **list_r,
+			   const char **error_r);
+void fts_language_list_deinit(struct fts_language_list **list);
+
+/* Add a language to the list of wanted languages. */
+void fts_language_list_add(struct fts_language_list *list,
+			   const struct fts_language *lang);
+/* Add wanted languages from a space-separated list of language names.
+   Duplicates are ignored. Returns TRUE if ok, FALSE and unknown_name if an
+   unknown language was found from the list. */
+bool fts_language_list_add_names(struct fts_language_list *list,
+				 const char *names,
+				 const char **unknown_name_r);
+
+/* Return an array of all wanted languages. */
+const ARRAY_TYPE(fts_language) *
+fts_language_list_get_all(struct fts_language_list *list);
+/* Returns the first wanted language (default language). */
+const struct fts_language *
+fts_language_list_get_first(struct fts_language_list *list);
+
+/* If text was detected to be one of the languages in the list,
+   returns FTS_LANGUAGE_RESULT_OK and (a pointer to) the language (in
+   the list). error_r is set for FTS_LANGUAGE_RESULT_ERROR. */
+enum fts_language_result
+fts_language_detect(struct fts_language_list *list,
+		    const unsigned char *text, size_t size,
+		    const struct fts_language **lang_r,
+		    const char **error_r);
+
+#endif