/* PSPP - a program for statistical analysis.
- Copyright (C) 2006 Free Software Foundation, Inc.
+ 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
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));
+ msg (ME, _("An error occurred while opening `%s': %s."),
+ 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. */
{
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)
return pfm_open_reader (handle, dict, NULL);
- msg (SE, _("\"%s\" is not a system or portable file."),
+ msg (SE, _("`%s' is not a system or portable file."),
fh_get_file_name (handle));
return NULL;
}