auto-completion for paths when sending file & improved auto-complete algorithm to do partial matches

src/autocomplete.h

@@ -0,0 +1,43 @@
+/*  autocomplete.h
+ *
+ *
+ *  Copyright (C) 2014 Toxic All Rights Reserved.
+ *
+ *  This file is part of Toxic.
+ *
+ *  Toxic is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Toxic is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Toxic.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef _autocomplete_h
+#define _autocomplete_h
+
+/* looks for the first instance in list that begins with the last entered word in line according to pos,
+   then fills line with the complete word. e.g. "Hello jo" would complete the line
+   with "Hello john". Works slightly differently for directory paths with the same results.
+
+   list is a pointer to the list of strings being compared, n_items is the number of items
+   in the list, and size is the size of each item in the list.
+
+   Returns the difference between the old len and new len of line on success, -1 if error */
+int complete_line(ChatContext *ctx, const void *list, int n_items, int size);
+
+/* matches /sendfile "<incomplete-dir>" line to matching directories.
+
+   if only one match, auto-complete line and return diff between old len and new len.
+   return 0 if > 1 match and print out all the matches
+   return -1 if no matches  */
+int dir_match(ToxWindow *self, Tox *m, const wchar_t *line);
+
+#endif  /* #define _autocomplete_h */