#include <stdlib.h>
#include <string.h>
+#include "data/dataset.h"
+#include "data/file-name.h"
+#include "data/variable.h"
#include "libpspp/compiler.h"
#include "libpspp/hmap.h"
#include "libpspp/i18n.h"
-#include "libpspp/ll.h"
#include "libpspp/message.h"
#include "libpspp/str.h"
#include "libpspp/hash-functions.h"
-#include "data/file-name.h"
-#include "data/variable.h"
-#include "data/scratch-handle.h"
#include "gl/xalloc.h"
/* File handle. */
struct file_handle
{
- struct ll ll; /* Element in global list. */
+ struct hmap_node name_node; /* Element in named_handles hmap. */
size_t ref_cnt; /* Number of references. */
char *id; /* Identifier token, NULL if none. */
char *name; /* User-friendly identifying name. */
size_t record_width; /* Length of fixed-format records. */
size_t tab_width; /* Tab width, 0=do not expand tabs. */
- /* FH_REF_SCRATCH only. */
- struct scratch_handle *sh; /* Scratch file data. */
+ /* FH_REF_DATASET only. */
+ struct dataset *ds; /* Dataset. */
};
-static struct file_handle *
-file_handle_from_ll (struct ll *ll)
-{
- return ll_data (ll, struct file_handle, ll);
-}
-
-/* List of all named handles. */
-static struct ll_list named_handles;
+/* All "struct file_handle"s with nonnull 'id' member. */
+static struct hmap named_handles = HMAP_INITIALIZER (named_handles);
/* Default file handle for DATA LIST, REREAD, REPEATING DATA
commands. */
void
fh_init (void)
{
- ll_init (&named_handles);
inline_file = create_handle ("INLINE", xstrdup ("INLINE"), FH_REF_INLINE);
inline_file->record_width = 80;
inline_file->tab_width = 8;
void
fh_done (void)
{
- while (!ll_is_empty (&named_handles))
- unname_handle (file_handle_from_ll (ll_head (&named_handles)));
+ struct file_handle *handle, *next;
+
+ HMAP_FOR_EACH_SAFE (handle, next,
+ struct file_handle, name_node, &named_handles)
+ unname_handle (handle);
}
/* Free HANDLE and remove it from the global list. */
{
/* Remove handle from global list. */
if (handle->id != NULL)
- ll_remove (&handle->ll);
+ hmap_delete (&named_handles, &handle->name_node);
/* Free data. */
free (handle->id);
free (handle->name);
free (handle->file_name);
- scratch_handle_destroy (handle->sh);
free (handle);
}
assert (handle->id != NULL);
free (handle->id);
handle->id = NULL;
- ll_remove (&handle->ll);
+ hmap_delete (&named_handles, &handle->name_node);
/* Drop the reference held by the named_handles table. */
fh_unref (handle);
{
struct file_handle *handle;
- ll_for_each (handle, struct file_handle, ll, &named_handles)
+ HMAP_FOR_EACH_WITH_HASH (handle, struct file_handle, name_node,
+ hash_case_string (id, 0), &named_handles)
if (!strcasecmp (id, handle->id))
{
handle->ref_cnt++;
if (id != NULL)
{
assert (fh_from_id (id) == NULL);
- ll_push_tail (&named_handles, &handle->ll);
+ hmap_insert (&named_handles, &handle->name_node,
+ hash_case_string (handle->id, 0));
handle->ref_cnt++;
}
return inline_file;
}
-/* Creates and returns a new file handle with the given ID, which
- may be null. If it is non-null, it must be unique among
- existing file identifiers. The new handle is associated with
- file FILE_NAME and the given PROPERTIES. */
+/* Creates and returns a new file handle with the given ID, which may be null.
+ If it is non-null, it must be a UTF-8 encoded string that is unique among
+ existing file identifiers. The new handle is associated with file FILE_NAME
+ and the given PROPERTIES. */
struct file_handle *
fh_create_file (const char *id, const char *file_name,
const struct fh_properties *properties)
/* Creates a new file handle with the given ID, which must be
unique among existing file identifiers. The new handle is
- associated with a scratch file (initially empty). */
+ associated with a dataset file (initially empty). */
struct file_handle *
-fh_create_scratch (const char *id)
+fh_create_dataset (struct dataset *ds)
{
+ const char *name;
struct file_handle *handle;
- handle = create_handle (id, xstrdup (id), FH_REF_SCRATCH);
- handle->sh = NULL;
+
+ name = dataset_name (ds);
+ if (name[0] == '\0')
+ name = _("active dataset");
+
+ handle = create_handle (NULL, xstrdup (name), FH_REF_DATASET);
+ handle->ds = ds;
return handle;
}
return (handle->referent == FH_REF_FILE ? handle->encoding : C_ENCODING);
}
-/* Returns the scratch file handle associated with HANDLE.
- Applicable to only FH_REF_SCRATCH files. */
-struct scratch_handle *
-fh_get_scratch_handle (const struct file_handle *handle)
+/* Returns the dataset handle associated with HANDLE.
+ Applicable to only FH_REF_DATASET files. */
+struct dataset *
+fh_get_dataset (const struct file_handle *handle)
{
- assert (handle->referent == FH_REF_SCRATCH);
- return handle->sh;
-}
-
-/* Sets SH to be the scratch file handle associated with HANDLE.
- Applicable to only FH_REF_SCRATCH files. */
-void
-fh_set_scratch_handle (struct file_handle *handle, struct scratch_handle *sh)
-{
- assert (handle->referent == FH_REF_SCRATCH);
- handle->sh = sh;
+ assert (handle->referent == FH_REF_DATASET);
+ return handle->ds;
}
/* Returns the current default handle. */
union
{
struct file_identity *file; /* FH_REF_FILE only. */
- unsigned int unique_id; /* FH_REF_SCRATCH only. */
+ unsigned int unique_id; /* FH_REF_DATASET only. */
}
u;
enum fh_access access; /* Type of file access. */
lock->access = access;
if (lock->referent == FH_REF_FILE)
lock->u.file = fn_get_identity (fh_get_file_name (h));
- else if (lock->referent == FH_REF_SCRATCH)
- {
- struct scratch_handle *sh = fh_get_scratch_handle (h);
- lock->u.unique_id = sh != NULL ? sh->unique_id : 0;
- }
+ else if (lock->referent == FH_REF_DATASET)
+ lock->u.unique_id = dataset_seqno (fh_get_dataset (h));
}
/* Frees the key fields in LOCK. */
return a->access < b->access ? -1 : 1;
else if (a->referent == FH_REF_FILE)
return fn_compare_file_identities (a->u.file, b->u.file);
- else if (a->referent == FH_REF_SCRATCH)
+ else if (a->referent == FH_REF_DATASET)
return (a->u.unique_id < b->u.unique_id ? -1
: a->u.unique_id > b->u.unique_id);
else
unsigned int basis;
if (lock->referent == FH_REF_FILE)
basis = fn_hash_identity (lock->u.file);
- else if (lock->referent == FH_REF_SCRATCH)
+ else if (lock->referent == FH_REF_DATASET)
basis = lock->u.unique_id;
else
basis = 0;
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