1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2009, 2010, 2012, 2013 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "data/case.h"
22 #include "data/casereader.h"
23 #include "data/dataset.h"
24 #include "data/dictionary.h"
25 #include "data/transformations.h"
26 #include "data/variable.h"
27 #include "language/command.h"
28 #include "language/lexer/lexer.h"
29 #include "language/lexer/variable-parser.h"
30 #include "libpspp/array.h"
31 #include "libpspp/compiler.h"
32 #include "libpspp/hash-functions.h"
33 #include "libpspp/hmap.h"
34 #include "libpspp/i18n.h"
35 #include "libpspp/message.h"
36 #include "libpspp/pool.h"
37 #include "libpspp/str.h"
39 #include "gl/xalloc.h"
40 #include "gl/c-xvasprintf.h"
41 #include "gl/mbiter.h"
45 #define _(msgid) gettext (msgid)
47 /* FIXME: Implement PRINT subcommand. */
49 /* Explains how to recode one value. */
52 struct hmap_node hmap_node; /* Element in "struct arc_spec" hash table. */
53 union value from; /* Original value. */
54 int width; /* Width of the original value */
56 double to; /* Recoded value. */
59 /* Explains how to recode an AUTORECODE variable. */
62 int width; /* Variable width. */
63 int src_idx; /* Case index of source variable. */
64 struct variable *dst; /* Target variable. */
65 struct rec_items *items;
68 /* Descending or ascending sort order. */
77 struct hmap ht; /* Hash table of "struct arc_item"s. */
83 /* AUTORECODE data. */
86 struct arc_spec *specs;
89 /* Hash table of "struct arc_item"s. */
90 struct rec_items *global_items;
95 static trns_proc_func autorecode_trns_proc;
96 static trns_free_func autorecode_trns_free;
98 static int compare_arc_items (const void *, const void *, const void *aux);
99 static void arc_free (struct autorecode_pgm *);
100 static struct arc_item *find_arc_item (const struct arc_spec *, const union value *,
104 value_is_blank (const union value *val, int width, const struct dictionary *dict)
107 const char *str = CHAR_CAST_BUG (const char*, value_str (val, width));
108 char *text = recode_string (UTF8, dict_get_encoding (dict), str, width);
110 for (mbi_init (iter, text, width); mbi_avail (iter); mbi_advance (iter))
112 mbchar_t c = mbi_cur (iter);
114 if ( ! mb_isblank (c))
125 /* Performs the AUTORECODE procedure. */
127 cmd_autorecode (struct lexer *lexer, struct dataset *ds)
129 struct autorecode_pgm *arc = NULL;
131 struct dictionary *dict = dataset_dict (ds);
132 const struct variable **src_vars = NULL;
133 char **dst_names = NULL;
137 enum arc_direction direction = ASCENDING;
139 struct casereader *input;
145 /* Create procedure. */
146 arc = xzalloc (sizeof *arc);
147 arc->blank_valid = true;
149 /* Parse variable lists. */
150 lex_match_id (lexer, "VARIABLES");
151 lex_match (lexer, T_EQUALS);
152 if (!parse_variables_const (lexer, dict, &src_vars, &n_srcs,
153 PV_NO_DUPLICATE | PV_NO_SCRATCH))
155 if (!lex_force_match_id (lexer, "INTO"))
157 lex_match (lexer, T_EQUALS);
158 if (!parse_DATA_LIST_vars (lexer, dict, &dst_names, &n_dsts,
161 if (n_dsts != n_srcs)
163 msg (SE, _("Source variable count (%zu) does not match "
164 "target variable count (%zu)."),
169 for (i = 0; i < n_dsts; i++)
171 const char *name = dst_names[i];
173 if (dict_lookup_var (dict, name) != NULL)
175 msg (SE, _("Target variable %s duplicates existing variable %s."),
182 while (lex_match (lexer, T_SLASH))
184 if (lex_match_id (lexer, "DESCENDING"))
185 direction = DESCENDING;
186 else if (lex_match_id (lexer, "PRINT"))
188 /* Not yet implemented. */
190 else if (lex_match_id (lexer, "GROUP"))
192 arc->global_items = xmalloc (sizeof (*arc->global_items));
193 arc->global_items->refcnt = 1;
194 hmap_init (&arc->global_items->ht);
196 else if (lex_match_id (lexer, "BLANK"))
198 lex_match (lexer, T_EQUALS);
199 if (lex_match_id (lexer, "VALID"))
201 arc->blank_valid = true;
203 else if (lex_match_id (lexer, "MISSING"))
205 arc->blank_valid = false;
214 if (lex_token (lexer) != T_ENDCMD)
216 lex_error (lexer, _("expecting end of command"));
220 arc->specs = xmalloc (n_dsts * sizeof *arc->specs);
221 arc->n_specs = n_dsts;
224 for (i = 0; i < n_dsts; i++)
226 struct arc_spec *spec = &arc->specs[i];
228 spec->width = var_get_width (src_vars[i]);
229 spec->src_idx = var_get_case_index (src_vars[i]);
231 if (arc->global_items)
233 arc->global_items->refcnt++;
234 spec->items = arc->global_items;
238 spec->items = xzalloc (sizeof (*spec->items));
239 spec->items->refcnt = 1;
240 hmap_init (&spec->items->ht);
245 /* Execute procedure. */
246 input = proc_open (ds);
247 for (; (c = casereader_read (input)) != NULL; case_unref (c))
248 for (i = 0; i < arc->n_specs; i++)
250 struct arc_spec *spec = &arc->specs[i];
251 int width = spec->width;
252 const union value *value = case_data_idx (c, spec->src_idx);
253 size_t hash = value_hash (value, width, 0);
254 struct arc_item *item;
256 item = find_arc_item (spec, value, hash);
260 || val_type_from_width (spec->width) == VAL_NUMERIC
261 || ! value_is_blank (value, width, dict))
264 item = xmalloc (sizeof *item);
266 value_clone (&item->from, value, width);
267 hmap_insert (&spec->items->ht, &item->hmap_node, hash);
270 ok = casereader_destroy (input);
271 ok = proc_commit (ds) && ok;
273 /* Re-fetch dictionary because it might have changed (if TEMPORARY was in
275 dict = dataset_dict (ds);
277 /* Create transformation. */
278 for (i = 0; i < arc->n_specs; i++)
280 struct arc_spec *spec = &arc->specs[i];
281 struct arc_item **items;
282 struct arc_item *item;
286 /* Create destination variable. */
287 spec->dst = dict_create_var_assert (dict, dst_names[i], 0);
289 /* Create array of pointers to items. */
290 n_items = hmap_count (&spec->items->ht);
291 items = xmalloc (n_items * sizeof *items);
293 HMAP_FOR_EACH (item, struct arc_item, hmap_node, &spec->items->ht)
296 assert (j == n_items);
298 /* Sort array by value. */
299 sort (items, n_items, sizeof *items, compare_arc_items, NULL);
301 /* Assign recoded values in sorted order. */
302 for (j = 0; j < n_items; j++)
304 const union value *from = &items[j]->from;
305 char *recoded_value = NULL;
306 const int src_width = items[j]->width;
310 value_init (&to_val, 0);
312 items[j]->to = direction == ASCENDING ? j + 1 : n_items - j;
314 to_val.f = items[j]->to;
316 /* Add value labels to the destination variable which indicate
317 the source value from whence the new value comes. */
320 const char *str = CHAR_CAST_BUG (const char*, value_str (from, src_width));
322 recoded_value = recode_string (UTF8, dict_get_encoding (dict),
326 recoded_value = c_xasprintf ("%g", from->f);
328 /* Remove trailing whitespace */
329 len = strlen (recoded_value);
330 while (len > 0 && recoded_value[len - 1] == ' ')
331 recoded_value[--len] = '\0';
333 var_add_value_label (spec->dst, &to_val, recoded_value);
334 value_destroy (&to_val, 0);
335 free (recoded_value);
341 add_transformation (ds, autorecode_trns_proc, autorecode_trns_free, arc);
343 for (i = 0; i < n_dsts; i++)
348 return ok ? CMD_SUCCESS : CMD_CASCADING_FAILURE;
351 for (i = 0; i < n_dsts; i++)
356 return CMD_CASCADING_FAILURE;
360 arc_free (struct autorecode_pgm *arc)
366 for (i = 0; i < arc->n_specs; i++)
368 struct arc_spec *spec = &arc->specs[i];
369 struct arc_item *item, *next;
371 HMAP_FOR_EACH_SAFE (item, next, struct arc_item, hmap_node,
374 value_destroy (&item->from, item->width);
375 hmap_delete (&spec->items->ht, &item->hmap_node);
380 for (i = 0; i < arc->n_specs; i++)
382 struct arc_spec *spec = &arc->specs[i];
384 if (--spec->items->refcnt == 0)
386 hmap_destroy (&spec->items->ht);
391 if (arc->global_items && --arc->global_items->refcnt == 0)
393 hmap_destroy (&arc->global_items->ht);
394 free (arc->global_items);
402 static struct arc_item *
403 find_arc_item (const struct arc_spec *spec, const union value *value,
406 struct arc_item *item;
408 HMAP_FOR_EACH_WITH_HASH (item, struct arc_item, hmap_node, hash, &spec->items->ht)
409 if (value_equal (value, &item->from, spec->width))
415 compare_arc_items (const void *a_, const void *b_, const void *aux UNUSED)
417 const struct arc_item *const *a = a_;
418 const struct arc_item *const *b = b_;
419 int width_a = (*a)->width;
420 int width_b = (*b)->width;
422 if ( width_a == width_b)
423 return value_compare_3way (&(*a)->from, &(*b)->from, width_a);
425 if ( width_a == 0 && width_b != 0)
428 if ( width_b == 0 && width_a != 0)
431 return buf_compare_rpad (CHAR_CAST_BUG (const char *, value_str (&(*a)->from, width_a)), width_a,
432 CHAR_CAST_BUG (const char *, value_str (&(*b)->from, width_b)), width_b);
436 autorecode_trns_proc (void *arc_, struct ccase **c,
437 casenumber case_idx UNUSED)
439 struct autorecode_pgm *arc = arc_;
442 *c = case_unshare (*c);
443 for (i = 0; i < arc->n_specs; i++)
445 const struct arc_spec *spec = &arc->specs[i];
446 const union value *value = case_data_idx (*c, spec->src_idx);
447 unsigned int hash = value_hash (value, spec->width, 0);
448 const struct arc_item *item = find_arc_item (spec, value, hash);
450 case_data_rw (*c, spec->dst)->f = item ? item->to : SYSMIS;
453 return TRNS_CONTINUE;
457 autorecode_trns_free (void *arc_)
459 struct autorecode_pgm *arc = arc_;