gui: Merge File|Open|Syntax and File|Open|Data into File|Open.

[pspp] / src / data / any-reader.c

diff --git a/src/data/any-reader.c b/src/data/any-reader.c
index 18a28c6d1ed14231dcb1be18c90d18c7d1dac08e..731f552a9f9021bf05ffd524c5fbebad11946405 100644 (file)
--- a/src/data/any-reader.c
+++ b/src/data/any-reader.c
@@ -1,20 +1,18 @@
-/* PSPP - computes sample statistics.
-   Copyright (C) 2006 Free Software Foundation, Inc.
+/* PSPP - a program for statistical analysis.
+   Copyright (C) 2006, 2010 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 2 of the
-   License, or (at your option) any later version.
+   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.
+   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, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA. */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
 #include <config.h>
 #include "any-reader.h"
@@ -44,30 +42,38 @@ enum detect_result
     IO_ERROR                    /* File couldn't be opened. */
   };
 
-/* Tries to detect whether HANDLE represents a given type of
-   file, by opening the file and passing it to DETECT, and
-   returns a detect_result. */
+/* Tries to detect whether FILE is a given type of file, by opening the file
+   and passing it to DETECT, and returns a detect_result. */
 static enum detect_result
-try_detect (struct file_handle *handle, bool (*detect) (FILE *))
+try_detect (const char *file_name, bool (*detect) (FILE *))
 {
   FILE *file;
   bool is_type;
 
-  file = fn_open (fh_get_file_name (handle), "rb");
+  file = fn_open (file_name, "rb");
   if (file == NULL)
     {
       msg (ME, _("An error occurred while opening \"%s\": %s."),
-           fh_get_file_name (handle), strerror (errno));
+           file_name, strerror (errno));
       return IO_ERROR;
     }
 
   is_type = detect (file);
 
-  fn_close (fh_get_file_name (handle), file);
+  fn_close (file_name, file);
 
   return is_type ? YES : NO;
 }
 
+/* Returns true if any_reader_open() would be able to open FILE as a data
+   file, false otherwise. */
+bool
+any_reader_may_open (const char *file)
+{
+  return (try_detect (file, sfm_detect) == YES
+          || try_detect (file, pfm_detect) == YES);
+}
+
 /* Returns a casereader for HANDLE.  On success, returns the new
    casereader and stores the file's dictionary into *DICT.  On
    failure, returns a null pointer. */
@@ -80,13 +86,13 @@ any_reader_open (struct file_handle *handle, struct dictionary **dict)
       {
         enum detect_result result;
 
-        result = try_detect (handle, sfm_detect);
+        result = try_detect (fh_get_file_name (handle), sfm_detect);
         if (result == IO_ERROR)
           return NULL;
         else if (result == YES)
           return sfm_open_reader (handle, dict, NULL);
 
-        result = try_detect (handle, pfm_detect);
+        result = try_detect (fh_get_file_name (handle), pfm_detect);
         if (result == IO_ERROR)
           return NULL;
         else if (result == YES)