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diff --git a/src/libpspp/line-reader.h b/src/libpspp/line-reader.h
new file mode 100644
index 0000000000..e9b2f50107
--- /dev/null
+++ b/src/libpspp/line-reader.h
@@ -0,0 +1,54 @@
+/* PSPP - a program for statistical analysis.
+   Copyright (C) 2010, 2011 Free Software Foundation, Inc.
+
+   This program 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.
+
+   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef LIBPSPP_LINE_READER_H
+#define LIBPSPP_LINE_READER_H 1
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <sys/types.h>
+
+/* line_reader.
+
+   Reads a text file in an arbitrary encoding one line at a time, with
+   optional automatic encoding detection.
+*/
+
+#define LINE_READER_BUFFER_SIZE 4096
+
+struct string;
+
+struct line_reader *line_reader_for_fd (const char *encoding, int fd);
+struct line_reader *line_reader_for_file (const char *encoding,
+                                          const char *filename, int flags);
+
+int line_reader_close (struct line_reader *);
+void line_reader_free (struct line_reader *);
+
+bool line_reader_read (struct line_reader *, struct string *,
+                       size_t max_length);
+
+int line_reader_fileno (const struct line_reader *);
+off_t line_reader_tell (const struct line_reader *);
+
+bool line_reader_eof (const struct line_reader *);
+int line_reader_error (const struct line_reader *);
+
+const char *line_reader_get_encoding (const struct line_reader *);
+
+bool line_reader_is_auto (const struct line_reader *);
+
+#endif /* libpspp/line-reader.h */