/* PSPP - computes sample statistics.
Copyright (C) 2006 Free Software Foundation, Inc.
- Written by Ben Pfaff <blp@gnu.org>.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
02110-1301, USA. */
#include <config.h>
+
#include "scratch-writer.h"
+
#include <stdlib.h>
-#include "case.h"
-#include "casefile.h"
-#include "dictionary.h"
-#include "file-handle-def.h"
-#include "scratch-handle.h"
+
+#include <data/case.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 <libpspp/compiler.h>
+#include <libpspp/taint.h>
+
#include "xalloc.h"
/* 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 casewriter *subwriter; /* Data output. */
};
+static 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;
+ struct casewriter *casewriter;
if (!fh_open (fh, FH_REF_SCRATCH, "scratch file", "we"))
return NULL;
/* Destroy previous contents of handle. */
sh = fh_get_scratch_handle (fh);
- if (sh != NULL)
+ if (sh != NULL)
scratch_handle_destroy (sh);
/* Copy the dictionary and compact if needed. */
scratch_dict = dict_clone (dictionary);
- if (dict_compacting_would_shrink (scratch_dict))
+ if (dict_compacting_would_shrink (scratch_dict))
{
compactor = dict_make_compactor (scratch_dict);
dict_compact_values (scratch_dict);
/* Create new contents. */
sh = xmalloc (sizeof *sh);
sh->dictionary = scratch_dict;
- sh->casefile = casefile_create (dict_get_next_value_idx (sh->dictionary));
+ sh->casereader = NULL;
/* Create writer. */
writer = xmalloc (sizeof *writer);
writer->handle = sh;
writer->fh = fh;
writer->compactor = compactor;
+ writer->subwriter = autopaging_writer_create (dict_get_next_value_idx (
+ scratch_dict));
fh_set_scratch_handle (fh, sh);
- return writer;
+ casewriter = casewriter_create (&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_writer *writer = writer_;
struct scratch_handle *handle = writer->handle;
- if (writer->compactor)
+ struct ccase tmp;
+ 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);
+ case_create (&tmp, dict_get_next_value_idx (handle->dictionary));
+ dict_compactor_compact (writer->compactor, &tmp, c);
+ case_destroy (c);
}
- else
- return casefile_append (handle->casefile, c);
-}
-
-/* Returns true if an I/O error occurred on WRITER, false otherwise. */
-bool
-scratch_writer_error (const struct scratch_writer *writer)
-{
- return casefile_error (writer->handle->casefile);
+ else
+ case_move (&tmp, c);
+ casewriter_write (writer->subwriter, &tmp);
}
-/* Closes WRITER.
- Returns true if successful, false if an I/O error occurred on WRITER. */
-bool
-scratch_writer_close (struct scratch_writer *writer)
+/* Closes WRITER. */
+static void
+scratch_writer_casewriter_destroy (struct casewriter *w UNUSED, void *writer_)
{
- struct casefile *cf = writer->handle->casefile;
- bool ok = casefile_error (cf);
- casefile_mode_reader (cf);
+ struct scratch_writer *writer = writer_;
+ struct casereader *reader = casewriter_make_reader (writer->subwriter);
+ if (!casereader_error (reader))
+ writer->handle->casereader = reader;
fh_close (writer->fh, "scratch file", "we");
free (writer);
- return ok;
}
+
+static struct casewriter_class scratch_writer_casewriter_class =
+ {
+ scratch_writer_casewriter_write,
+ scratch_writer_casewriter_destroy,
+ NULL,
+ };