#include "language/command.h"
#include "language/lexer/lexer.h"
#include "language/lexer/variable-parser.h"
+#include "libpspp/array.h"
#include "libpspp/compiler.h"
-#include "libpspp/hash.h"
+#include "libpspp/hash-functions.h"
+#include "libpspp/hmap.h"
#include "libpspp/message.h"
#include "libpspp/pool.h"
#include "libpspp/str.h"
/* FIXME: Implement PRINT subcommand. */
-/* Explains how to recode one value. `from' must be first element. */
+/* Explains how to recode one value. */
struct arc_item
{
+ struct hmap_node hmap_node; /* Element in "struct arc_spec" hash table. */
union value from; /* Original value. */
double to; /* Recoded value. */
};
struct arc_spec
{
const struct variable *src; /* Source variable. */
- struct variable *dest; /* Target variable. */
- struct hsh_table *items; /* Hash table of `freq's. */
- };
-
-/* AUTORECODE transformation. */
-struct autorecode_trns
- {
- struct pool *pool; /* Contains AUTORECODE specs. */
- struct arc_spec *specs; /* AUTORECODE specifications. */
- size_t spec_cnt; /* Number of specifications. */
+ struct variable *dst; /* Target variable. */
+ struct hmap items; /* Hash table of "struct arc_item"s. */
};
/* Descending or ascending sort order. */
-enum direction
+enum arc_direction
{
ASCENDING,
DESCENDING
/* AUTORECODE data. */
struct autorecode_pgm
{
- const struct variable **src_vars; /* Source variables. */
- char **dst_names; /* Target variable names. */
- struct variable **dst_vars; /* Target variables. */
- struct hsh_table **src_values; /* `union value's of source vars. */
- size_t var_cnt; /* Number of variables. */
- struct pool *src_values_pool; /* Pool used by src_values. */
- enum direction direction; /* Sort order. */
- int print; /* Print mapping table if nonzero. */
+ struct arc_spec *specs;
+ size_t n_specs;
};
static trns_proc_func autorecode_trns_proc;
static trns_free_func autorecode_trns_free;
-static hsh_compare_func compare_value;
-static hsh_hash_func hash_value;
-static void recode (struct dataset *, const struct autorecode_pgm *);
+static int compare_arc_items (const void *, const void *, const void *width);
static void arc_free (struct autorecode_pgm *);
+static struct arc_item *find_arc_item (struct arc_spec *, const union value *,
+ size_t hash);
/* Performs the AUTORECODE procedure. */
int
cmd_autorecode (struct lexer *lexer, struct dataset *ds)
{
- struct autorecode_pgm arc;
+ struct autorecode_pgm *arc = NULL;
+
+ const struct variable **src_vars = NULL;
+ char **dst_names = NULL;
+ size_t n_srcs = 0;
+ size_t n_dsts = 0;
+
+ enum arc_direction direction;
+ bool print;
+
struct casereader *input;
struct ccase *c;
- size_t dst_cnt;
+
size_t i;
bool ok;
- arc.src_vars = NULL;
- arc.dst_names = NULL;
- arc.dst_vars = NULL;
- arc.src_values = NULL;
- arc.var_cnt = 0;
- arc.src_values_pool = NULL;
- arc.direction = ASCENDING;
- arc.print = 0;
- dst_cnt = 0;
-
+ /* Parse variable lists. */
lex_match_id (lexer, "VARIABLES");
lex_match (lexer, '=');
- if (!parse_variables_const (lexer, dataset_dict (ds), &arc.src_vars,
- &arc.var_cnt, PV_NO_DUPLICATE))
- goto lossage;
+ if (!parse_variables_const (lexer, dataset_dict (ds), &src_vars, &n_srcs,
+ PV_NO_DUPLICATE))
+ goto error;
if (!lex_force_match_id (lexer, "INTO"))
- goto lossage;
+ goto error;
lex_match (lexer, '=');
- if (!parse_DATA_LIST_vars (lexer, &arc.dst_names, &dst_cnt, PV_NONE))
- goto lossage;
- if (dst_cnt != arc.var_cnt)
+ if (!parse_DATA_LIST_vars (lexer, &dst_names, &n_dsts, PV_NO_DUPLICATE))
+ goto error;
+ if (n_dsts != n_srcs)
{
- size_t i;
-
msg (SE, _("Source variable count (%zu) does not match "
"target variable count (%zu)."),
- arc.var_cnt, dst_cnt);
-
- for (i = 0; i < dst_cnt; i++)
- free (arc.dst_names[i]);
- free (arc.dst_names);
- arc.dst_names = NULL;
+ n_srcs, n_dsts);
- goto lossage;
+ goto error;
}
+ for (i = 0; i < n_dsts; i++)
+ {
+ const char *name = dst_names[i];
+
+ if (dict_lookup_var (dataset_dict (ds), name) != NULL)
+ {
+ msg (SE, _("Target variable %s duplicates existing variable %s."),
+ name, name);
+ goto error;
+ }
+ }
+
+ /* Parse options. */
+ direction = ASCENDING;
+ print = false;
while (lex_match (lexer, '/'))
if (lex_match_id (lexer, "DESCENDING"))
- arc.direction = DESCENDING;
+ direction = DESCENDING;
else if (lex_match_id (lexer, "PRINT"))
- arc.print = 1;
+ print = true;
if (lex_token (lexer) != '.')
{
lex_error (lexer, _("expecting end of command"));
- goto lossage;
+ goto error;
}
- for (i = 0; i < arc.var_cnt; i++)
+ /* Create procedure. */
+ arc = xmalloc (sizeof *arc);
+ arc->specs = xmalloc (n_dsts * sizeof *arc->specs);
+ arc->n_specs = n_dsts;
+ for (i = 0; i < n_dsts; i++)
{
- int j;
-
- if (dict_lookup_var (dataset_dict (ds), arc.dst_names[i]) != NULL)
- {
- msg (SE, _("Target variable %s duplicates existing variable %s."),
- arc.dst_names[i], arc.dst_names[i]);
- goto lossage;
- }
- for (j = 0; j < i; j++)
- if (!strcasecmp (arc.dst_names[i], arc.dst_names[j]))
- {
- msg (SE, _("Duplicate variable name %s among target variables."),
- arc.dst_names[i]);
- goto lossage;
- }
- }
-
- arc.src_values_pool = pool_create ();
- arc.dst_vars = xnmalloc (arc.var_cnt, sizeof *arc.dst_vars);
- arc.src_values = xnmalloc (arc.var_cnt, sizeof *arc.src_values);
- for (i = 0; i < dst_cnt; i++)
- arc.src_values[i] = hsh_create (10, compare_value, hash_value, NULL,
- arc.src_vars[i]);
+ struct arc_spec *spec = &arc->specs[i];
+ spec->src = src_vars[i];
+ hmap_init (&spec->items);
+ }
+ /* Execute procedure. */
input = proc_open (ds);
for (; (c = casereader_read (input)) != NULL; case_unref (c))
- for (i = 0; i < arc.var_cnt; i++)
+ for (i = 0; i < arc->n_specs; i++)
{
- const union value *vp;
- union value **vpp;
-
- vp = case_data (c, arc.src_vars[i]);
- vpp = (union value **) hsh_probe (arc.src_values[i], vp);
- if (*vpp == NULL)
+ struct arc_spec *spec = &arc->specs[i];
+ int width = var_get_width (spec->src);
+ const union value *value = case_data (c, spec->src);
+ size_t hash = value_hash (value, width, 0);
+ struct arc_item *item;
+
+ item = find_arc_item (spec, value, hash);
+ if (item == NULL)
{
- *vpp = pool_alloc (arc.src_values_pool, sizeof **vpp);
- value_clone_pool (arc.src_values_pool, *vpp, vp,
- var_get_width (arc.src_vars[i]));
+ item = xmalloc (sizeof *item);
+ value_clone (&item->from, value, width);
+ hmap_insert (&spec->items, &item->hmap_node, hash);
}
}
ok = casereader_destroy (input);
ok = proc_commit (ds) && ok;
- for (i = 0; i < arc.var_cnt; i++)
- arc.dst_vars[i] = dict_create_var_assert (dataset_dict (ds),
- arc.dst_names[i], 0);
+ /* Create transformation. */
+ for (i = 0; i < arc->n_specs; i++)
+ {
+ struct arc_spec *spec = &arc->specs[i];
+ struct arc_item **items;
+ struct arc_item *item;
+ size_t n_items;
+ int src_width;
+ size_t j;
+
+ /* Create destination variable. */
+ spec->dst = dict_create_var_assert (dataset_dict (ds), dst_names[i], 0);
+
+ /* Create array of pointers to items. */
+ n_items = hmap_count (&spec->items);
+ items = xmalloc (n_items * sizeof *items);
+ j = 0;
+ HMAP_FOR_EACH (item, struct arc_item, hmap_node, &spec->items)
+ items[j++] = item;
+ assert (j == n_items);
+
+ /* Sort array by value. */
+ src_width = var_get_width (spec->src);
+ sort (items, n_items, sizeof *items, compare_arc_items, &src_width);
+
+ /* Assign recoded values in sorted order. */
+ for (j = 0; j < n_items; j++)
+ items[j]->to = direction == ASCENDING ? j + 1 : n_items - j;
+
+ /* Free array. */
+ free (items);
+ }
+ add_transformation (ds, autorecode_trns_proc, autorecode_trns_free, arc);
- recode (ds, &arc);
- arc_free (&arc);
return ok ? CMD_SUCCESS : CMD_CASCADING_FAILURE;
-lossage:
- arc_free (&arc);
+error:
+ for (i = 0; i < n_dsts; i++)
+ free (dst_names[i]);
+ free (dst_names);
+ free (src_vars);
+ arc_free (arc);
return CMD_CASCADING_FAILURE;
}
static void
arc_free (struct autorecode_pgm *arc)
{
- free (arc->src_vars);
- if (arc->dst_names != NULL)
+ if (arc != NULL)
{
size_t i;
- for (i = 0; i < arc->var_cnt; i++)
- free (arc->dst_names[i]);
- free (arc->dst_names);
+ for (i = 0; i < arc->n_specs; i++)
+ {
+ struct arc_spec *spec = &arc->specs[i];
+ int width = var_get_width (spec->src);
+ struct arc_item *item, *next;
+
+ HMAP_FOR_EACH_SAFE (item, next, struct arc_item, hmap_node,
+ &spec->items)
+ {
+ value_destroy (&item->from, width);
+ hmap_delete (&spec->items, &item->hmap_node);
+ free (item);
+ }
+ hmap_destroy (&spec->items);
+ }
+ free (arc->specs);
+ free (arc);
}
- free (arc->dst_vars);
- if (arc->src_values != NULL)
- {
- size_t i;
-
- for (i = 0; i < arc->var_cnt; i++)
- hsh_destroy (arc->src_values[i]);
- free (arc->src_values);
- }
- pool_destroy (arc->src_values_pool);
}
-\f
-/* AUTORECODE transformation. */
+static struct arc_item *
+find_arc_item (struct arc_spec *spec, const union value *value,
+ size_t hash)
+{
+ struct arc_item *item;
+
+ HMAP_FOR_EACH_WITH_HASH (item, struct arc_item, hmap_node, hash,
+ &spec->items)
+ if (value_equal (value, &item->from, var_get_width (spec->src)))
+ return item;
+ return NULL;
+}
-static void
-recode (struct dataset *ds, const struct autorecode_pgm *arc)
+static int
+compare_arc_items (const void *a_, const void *b_, const void *width_)
{
- struct autorecode_trns *trns;
- size_t i;
+ const struct arc_item *const *a = a_;
+ const struct arc_item *const *b = b_;
+ const int *width = width_;
- trns = pool_create_container (struct autorecode_trns, pool);
- trns->specs = pool_nalloc (trns->pool, arc->var_cnt, sizeof *trns->specs);
- trns->spec_cnt = arc->var_cnt;
- for (i = 0; i < arc->var_cnt; i++)
- {
- struct arc_spec *spec = &trns->specs[i];
- void *const *p = hsh_sort (arc->src_values[i]);
- int count = hsh_count (arc->src_values[i]);
- int j;
-
- spec->src = arc->src_vars[i];
- spec->dest = arc->dst_vars[i];
- spec->items = hsh_create (2 * count, compare_value, hash_value,
- NULL, arc->src_vars[i]);
-
- for (j = 0; *p; p++, j++)
- {
- struct arc_item *item = pool_alloc (trns->pool, sizeof *item);
- union value *vp = *p;
-
- value_clone_pool (trns->pool, &item->from, vp,
- var_get_width (arc->src_vars[i]));
- item->to = arc->direction == ASCENDING ? j + 1 : count - j;
- hsh_force_insert (spec->items, item);
- }
- }
- add_transformation (ds,
- autorecode_trns_proc, autorecode_trns_free, trns);
+ return value_compare_3way (&(*a)->from, &(*b)->from, *width);
}
-/* Executes an AUTORECODE transformation. */
static int
-autorecode_trns_proc (void *trns_, struct ccase **c,
+autorecode_trns_proc (void *arc_, struct ccase **c,
casenumber case_idx UNUSED)
{
- struct autorecode_trns *trns = trns_;
+ struct autorecode_pgm *arc = arc_;
size_t i;
*c = case_unshare (*c);
- for (i = 0; i < trns->spec_cnt; i++)
+ for (i = 0; i < arc->n_specs; i++)
{
- struct arc_spec *spec = &trns->specs[i];
+ struct arc_spec *spec = &arc->specs[i];
+ int width = var_get_width (spec->src);
+ const union value *value = case_data (*c, spec->src);
struct arc_item *item;
- item = hsh_force_find (spec->items, case_data (*c, spec->src));
-
- case_data_rw (*c, spec->dest)->f = item->to;
+ item = find_arc_item (spec, value, value_hash (value, width, 0));
+ case_data_rw (*c, spec->dst)->f = item ? item->to : SYSMIS;
}
+
return TRNS_CONTINUE;
}
-/* Frees an AUTORECODE transformation. */
static bool
-autorecode_trns_free (void *trns_)
+autorecode_trns_free (void *arc_)
{
- struct autorecode_trns *trns = trns_;
- size_t i;
+ struct autorecode_pgm *arc = arc_;
- for (i = 0; i < trns->spec_cnt; i++)
- hsh_destroy (trns->specs[i].items);
- pool_destroy (trns->pool);
+ arc_free (arc);
return true;
}
-\f
-/* AUTORECODE procedure. */
-
-static int
-compare_value (const void *a_, const void *b_, const void *var_)
-{
- const union value *a = a_;
- const union value *b = b_;
- const struct variable *var = var_;
-
- return value_compare_3way (a, b, var_get_width (var));
-}
-
-static unsigned
-hash_value (const void *value_, const void *var_)
-{
- const union value *value = value_;
- const struct variable *var = var_;
-
- return value_hash (value, var_get_width (var), 0);
-}
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