-/* PSPP - computes sample statistics.
- Copyright (C) 2006 Free Software Foundation, Inc.
- Written by Ben Pfaff <blp@gnu.org>.
+/* PSPP - a program for statistical analysis.
+ Copyright (C) 2006, 2009 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 "scratch-writer.h"
+
#include <stdlib.h>
-#include "case.h"
-#include "casefile.h"
-#include "fastfile.h"
-#include "dictionary.h"
-#include "file-handle-def.h"
-#include "scratch-handle.h"
+
+#include <data/case.h>
+#include <data/case-map.h>
+#include <data/casereader.h>
+#include <data/casewriter-provider.h>
+#include <data/casewriter.h>
+#include <data/dictionary.h>
+#include <data/file-handle-def.h>
+#include <data/scratch-handle.h>
+#include <data/variable.h>
+#include <libpspp/compiler.h>
+#include <libpspp/taint.h>
+
#include "xalloc.h"
+#define N_(msgid) (msgid)
+
/* A scratch file writer. */
-struct scratch_writer
+struct scratch_writer
{
- struct scratch_handle *handle; /* Underlying scratch handle. */
struct file_handle *fh; /* Underlying file handle. */
- struct dict_compactor *compactor; /* Compacts into handle->dictionary. */
+ struct fh_lock *lock; /* Exclusive access to file handle. */
+ struct dictionary *dict; /* Dictionary for subwriter. */
+ struct case_map *compactor; /* Compacts into dictionary. */
+ struct casewriter *subwriter; /* Data output. */
};
+static const struct casewriter_class scratch_writer_casewriter_class;
+
/* Opens FH, which must have referent type FH_REF_SCRATCH, and
returns a scratch_writer for it, or a null pointer on
failure. Cases stored in the scratch_writer will be expected
- to be drawn from DICTIONARY.
-
- If you use an any_writer instead, then your code can be more
- flexible without being any harder to write. */
-struct scratch_writer *
+ to be drawn from DICTIONARY. */
+struct casewriter *
scratch_writer_open (struct file_handle *fh,
- const struct dictionary *dictionary)
+ const struct dictionary *dictionary)
{
- struct scratch_handle *sh;
struct scratch_writer *writer;
- struct dictionary *scratch_dict;
- struct dict_compactor *compactor;
-
- if (!fh_open (fh, FH_REF_SCRATCH, "scratch file", "we"))
+ struct casewriter *casewriter;
+ struct fh_lock *lock;
+
+ /* Get exclusive write access to handle. */
+ /* TRANSLATORS: this fragment will be interpolated into
+ messages in fh_lock() that identify types of files. */
+ lock = fh_lock (fh, FH_REF_SCRATCH, N_("scratch file"), FH_ACC_WRITE, true);
+ if (lock == NULL)
return NULL;
- /* Destroy previous contents of handle. */
- sh = fh_get_scratch_handle (fh);
- if (sh != NULL)
- scratch_handle_destroy (sh);
+ /* Create writer. */
+ writer = xmalloc (sizeof *writer);
+ writer->lock = lock;
+ writer->fh = fh_ref (fh);
- /* Copy the dictionary and compact if needed. */
- scratch_dict = dict_clone (dictionary);
- if (dict_compacting_would_shrink (scratch_dict))
+ writer->dict = dict_clone (dictionary);
+ dict_delete_scratch_vars (writer->dict);
+ if (dict_count_values (writer->dict, 0)
+ < dict_get_next_value_idx (writer->dict))
{
- compactor = dict_make_compactor (scratch_dict);
- dict_compact_values (scratch_dict);
+ writer->compactor = case_map_to_compact_dict (writer->dict, 0);
+ dict_compact_values (writer->dict);
}
else
- compactor = NULL;
-
- /* Create new contents. */
- sh = xmalloc (sizeof *sh);
- sh->dictionary = scratch_dict;
- sh->casefile = fastfile_create (dict_get_next_value_idx (sh->dictionary));
-
- /* Create writer. */
- writer = xmalloc (sizeof *writer);
- writer->handle = sh;
- writer->fh = fh;
- writer->compactor = compactor;
-
- fh_set_scratch_handle (fh, sh);
- return writer;
+ writer->compactor = NULL;
+ writer->subwriter = autopaging_writer_create (dict_get_proto (writer->dict));
+
+ casewriter = casewriter_create (dict_get_proto (writer->dict),
+ &scratch_writer_casewriter_class, writer);
+ taint_propagate (casewriter_get_taint (writer->subwriter),
+ casewriter_get_taint (casewriter));
+ return casewriter;
}
/* Writes case C to WRITER. */
-bool
-scratch_writer_write_case (struct scratch_writer *writer,
- const struct ccase *c)
+static void
+scratch_writer_casewriter_write (struct casewriter *w UNUSED, void *writer_,
+ struct ccase *c)
{
- struct scratch_handle *handle = writer->handle;
- if (writer->compactor)
- {
- struct ccase tmp_case;
- case_create (&tmp_case, dict_get_next_value_idx (handle->dictionary));
- dict_compactor_compact (writer->compactor, &tmp_case, c);
- return casefile_append_xfer (handle->casefile, &tmp_case);
- }
- else
- return casefile_append (handle->casefile, c);
+ struct scratch_writer *writer = writer_;
+ casewriter_write (writer->subwriter,
+ case_map_execute (writer->compactor, c));
}
-/* Returns true if an I/O error occurred on WRITER, false otherwise. */
-bool
-scratch_writer_error (const struct scratch_writer *writer)
+/* Closes WRITER. */
+static void
+scratch_writer_casewriter_destroy (struct casewriter *w UNUSED, void *writer_)
{
- return casefile_error (writer->handle->casefile);
-}
+ static unsigned int next_unique_id = 0x12345678;
-/* Closes WRITER.
- Returns true if successful, false if an I/O error occurred on WRITER. */
-bool
-scratch_writer_close (struct scratch_writer *writer)
-{
- struct casefile *cf = writer->handle->casefile;
- bool ok = casefile_error (cf);
- fh_close (writer->fh, "scratch file", "we");
+ struct scratch_writer *writer = writer_;
+ struct casereader *reader = casewriter_make_reader (writer->subwriter);
+ if (!casereader_error (reader))
+ {
+ /* Destroy previous contents of handle. */
+ struct scratch_handle *sh = fh_get_scratch_handle (writer->fh);
+ if (sh != NULL)
+ scratch_handle_destroy (sh);
+
+ /* Create new contents. */
+ sh = xmalloc (sizeof *sh);
+ sh->unique_id = ++next_unique_id;
+ sh->dictionary = writer->dict;
+ sh->casereader = reader;
+ fh_set_scratch_handle (writer->fh, sh);
+ }
+ else
+ {
+ casereader_destroy (reader);
+ dict_destroy (writer->dict);
+ }
+
+ fh_unlock (writer->lock);
+ fh_unref (writer->fh);
free (writer);
- return ok;
}
+
+static const struct casewriter_class scratch_writer_casewriter_class =
+ {
+ scratch_writer_casewriter_write,
+ scratch_writer_casewriter_destroy,
+ NULL,
+ };
projects / pspp-builds.git / blobdiff