1 /* PSPP - computes sample statistics.
2 Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
3 Written by Ben Pfaff <blp@gnu.org>.
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 This program is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 #include "bitvector.h"
26 #include "dictionary.h"
34 #define _(msgid) gettext (msgid)
36 /* Parses a name as a variable within VS and returns the
37 variable's index if successful. On failure emits an error
38 message and returns a null pointer. */
40 parse_vs_variable_idx (const struct var_set *vs)
46 lex_error (_("expecting variable name"));
50 idx = var_set_lookup_var_idx (vs, tokid);
52 msg (SE, _("%s is not a variable name."), tokid);
58 /* Parses a name as a variable within VS and returns the variable
59 if successful. On failure emits an error message and returns
61 static struct variable *
62 parse_vs_variable (const struct var_set *vs)
64 int idx = parse_vs_variable_idx (vs);
65 return idx >= 0 ? var_set_get_var (vs, idx) : NULL;
68 /* Parses a variable name in dictionary D and returns the
69 variable if successful. On failure emits an error message and
70 returns a null pointer. */
72 parse_dict_variable (const struct dictionary *d)
74 struct var_set *vs = var_set_create_from_dict (d);
75 struct variable *var = parse_vs_variable (vs);
80 /* Parses a variable name in default_dict and returns the
81 variable if successful. On failure emits an error message and
82 returns a null pointer. */
86 return parse_dict_variable (default_dict);
89 /* Returns the dictionary class corresponding to a variable named
92 dict_class_from_id (const char *name)
94 assert (name != NULL);
107 /* Returns the name of dictionary class DICT_CLASS. */
109 dict_class_to_name (enum dict_class dict_class)
114 return _("ordinary");
125 /* Parses a set of variables from dictionary D given options
126 OPTS. Resulting list of variables stored in *VAR and the
127 number of variables into *CNT. Returns nonzero only if
130 parse_variables (const struct dictionary *d, struct variable ***var,
137 assert (var != NULL);
138 assert (cnt != NULL);
140 vs = var_set_create_from_dict (d);
141 success = parse_var_set_vars (vs, var, cnt, opts);
144 var_set_destroy (vs);
148 /* Parses a variable name from VS. If successful, sets *IDX to
149 the variable's index in VS, *CLASS to the variable's
150 dictionary class, and returns nonzero. Returns zero on
153 parse_var_idx_class (const struct var_set *vs, int *idx,
154 enum dict_class *class)
156 *idx = parse_vs_variable_idx (vs);
160 *class = dict_class_from_id (var_set_get_var (vs, *idx)->name);
164 /* Add the variable from VS with index IDX to the list of
165 variables V that has *NV elements and room for *MV.
166 Uses and updates INCLUDED to avoid duplicates if indicated by
167 PV_OPTS, which also affects what variables are allowed in
170 add_variable (struct variable ***v, int *nv, int *mv,
171 char *included, int pv_opts,
172 const struct var_set *vs, int idx)
174 struct variable *add = var_set_get_var (vs, idx);
176 if ((pv_opts & PV_NUMERIC) && add->type != NUMERIC)
177 msg (SW, _("%s is not a numeric variable. It will not be "
178 "included in the variable list."), add->name);
179 else if ((pv_opts & PV_STRING) && add->type != ALPHA)
180 msg (SE, _("%s is not a string variable. It will not be "
181 "included in the variable list."), add->name);
182 else if ((pv_opts & PV_NO_SCRATCH)
183 && dict_class_from_id (add->name) == DC_SCRATCH)
184 msg (SE, _("Scratch variables (such as %s) are not allowed "
185 "here."), add->name);
186 else if ((pv_opts & PV_SAME_TYPE) && *nv && add->type != (*v)[0]->type)
187 msg (SE, _("%s and %s are not the same type. All variables in "
188 "this variable list must be of the same type. %s "
189 "will be omitted from list."),
190 (*v)[0]->name, add->name, add->name);
191 else if ((pv_opts & PV_NO_DUPLICATE) && included[idx])
192 msg (SE, _("Variable %s appears twice in variable list."), add->name);
198 *v = xrealloc (*v, *mv * sizeof **v);
201 if ((pv_opts & PV_DUPLICATE) || !included[idx])
204 if (!(pv_opts & PV_DUPLICATE))
210 /* Adds the variables in VS with indexes FIRST_IDX through
211 LAST_IDX, inclusive, to the list of variables V that has *NV
212 elements and room for *MV. Uses and updates INCLUDED to avoid
213 duplicates if indicated by PV_OPTS, which also affects what
214 variables are allowed in appropriate ways. */
216 add_variables (struct variable ***v, int *nv, int *mv, char *included,
218 const struct var_set *vs, int first_idx, int last_idx,
219 enum dict_class class)
223 for (i = first_idx; i <= last_idx; i++)
224 if (dict_class_from_id (var_set_get_var (vs, i)->name) == class)
225 add_variable (v, nv, mv, included, pv_opts, vs, i);
228 /* Note that if parse_variables() returns 0, *v is free()'d.
229 Conversely, if parse_variables() returns non-zero, then *nv is
230 nonzero and *v is non-NULL. */
232 parse_var_set_vars (const struct var_set *vs,
233 struct variable ***v, int *nv,
243 /* At most one of PV_NUMERIC, PV_STRING, PV_SAME_TYPE may be
245 assert ((((pv_opts & PV_NUMERIC) != 0)
246 + ((pv_opts & PV_STRING) != 0)
247 + ((pv_opts & PV_SAME_TYPE) != 0)) <= 1);
249 /* PV_DUPLICATE and PV_NO_DUPLICATE are incompatible. */
250 assert (!(pv_opts & PV_DUPLICATE) || !(pv_opts & PV_NO_DUPLICATE));
252 if (!(pv_opts & PV_APPEND))
261 if (!(pv_opts & PV_DUPLICATE))
265 included = xcalloc (var_set_get_cnt (vs), sizeof *included);
266 for (i = 0; i < *nv; i++)
267 included[(*v)[i]->index] = 1;
272 if (lex_match (T_ALL))
273 add_variables (v, nv, &mv, included, pv_opts,
274 vs, 0, var_set_get_cnt (vs) - 1, DC_ORDINARY);
279 enum dict_class class;
282 if (!parse_var_idx_class (vs, &first_idx, &class))
285 if (!lex_match (T_TO))
286 add_variable (v, nv, &mv, included, pv_opts,
291 enum dict_class last_class;
292 struct variable *first_var, *last_var;
294 if (!parse_var_idx_class (vs, &last_idx, &last_class))
297 first_var = var_set_get_var (vs, first_idx);
298 last_var = var_set_get_var (vs, last_idx);
300 if (last_idx < first_idx)
302 msg (SE, _("%s TO %s is not valid syntax since %s "
303 "precedes %s in the dictionary."),
304 first_var->name, last_var->name,
305 first_var->name, last_var->name);
309 if (class != last_class)
311 msg (SE, _("When using the TO keyword to specify several "
312 "variables, both variables must be from "
313 "the same variable dictionaries, of either "
314 "ordinary, scratch, or system variables. "
315 "%s is a %s variable, whereas %s is %s."),
316 first_var->name, dict_class_to_name (class),
317 last_var->name, dict_class_to_name (last_class));
321 add_variables (v, nv, &mv, included, pv_opts,
322 vs, first_idx, last_idx, class);
324 if (pv_opts & PV_SINGLE)
328 while (token == T_ID && var_set_lookup_var (vs, tokid) != NULL);
345 /* Extracts a numeric suffix from variable name S, copying it
346 into string R. Sets *D to the length of R and *N to its
349 extract_num (char *s, char *r, int *n, int *d)
353 /* Find first digit. */
354 cp = s + strlen (s) - 1;
355 while (isdigit ((unsigned char) *cp) && cp > s)
360 strncpy (r, s, cp - s);
363 /* Count initial zeros. */
372 while (isdigit ((unsigned char) *cp))
375 *n = (*n * 10) + (*cp - '0');
380 if (*n == 0 && *d == 0)
382 msg (SE, _("incorrect use of TO convention"));
388 /* Parses a list of variable names according to the DATA LIST version
389 of the TO convention. */
391 parse_DATA_LIST_vars (char ***names, int *nnames, int pv_opts)
397 char name1[LONG_NAME_LEN + 1], name2[LONG_NAME_LEN + 1];
398 char root1[LONG_NAME_LEN + 1], root2[LONG_NAME_LEN + 1];
401 assert (names != NULL);
402 assert (nnames != NULL);
403 assert ((pv_opts & ~(PV_APPEND | PV_SINGLE
404 | PV_NO_SCRATCH | PV_NO_DUPLICATE)) == 0);
405 /* FIXME: PV_NO_DUPLICATE is not implemented. */
407 if (pv_opts & PV_APPEND)
408 nvar = mvar = *nnames;
419 lex_error ("expecting variable name");
422 if (dict_class_from_id (tokid) == DC_SCRATCH
423 && (pv_opts & PV_NO_SCRATCH))
425 msg (SE, _("Scratch variables not allowed here."));
428 strcpy (name1, tokid);
435 lex_error ("expecting variable name");
438 strcpy (name2, tokid);
441 if (!extract_num (name1, root1, &n1, &d1)
442 || !extract_num (name2, root2, &n2, &d2))
445 if (strcasecmp (root1, root2))
447 msg (SE, _("Prefixes don't match in use of TO convention."));
452 msg (SE, _("Bad bounds in use of TO convention."));
458 if (mvar < nvar + (n2 - n1 + 1))
460 mvar += ROUND_UP (n2 - n1 + 1, 16);
461 *names = xrealloc (*names, mvar * sizeof **names);
464 for (n = n1; n <= n2; n++)
466 char name[LONG_NAME_LEN + 1];
467 sprintf (name, "%s%0*d", root1, d1, n);
468 (*names)[nvar] = xstrdup (name);
477 *names = xrealloc (*names, mvar * sizeof **names);
479 (*names)[nvar++] = xstrdup (name1);
484 if (pv_opts & PV_SINGLE)
487 while (token == T_ID);
495 for (i = 0; i < nvar; i++)
504 /* Parses a list of variables where some of the variables may be
505 existing and the rest are to be created. Same args as
506 parse_DATA_LIST_vars(). */
508 parse_mixed_vars (char ***names, int *nnames, int pv_opts)
512 assert (names != NULL);
513 assert (nnames != NULL);
514 assert ((pv_opts & ~PV_APPEND) == 0);
516 if (!(pv_opts & PV_APPEND))
521 while (token == T_ID || token == T_ALL)
523 if (token == T_ALL || dict_lookup_var (default_dict, tokid) != NULL)
528 if (!parse_variables (default_dict, &v, &nv, PV_NONE))
530 *names = xrealloc (*names, (*nnames + nv) * sizeof **names);
531 for (i = 0; i < nv; i++)
532 (*names)[*nnames + i] = xstrdup (v[i]->name);
536 else if (!parse_DATA_LIST_vars (names, nnames, PV_APPEND))
542 for (i = 0; i < *nnames; i++)
543 free ((*names)[*nnames]);
550 /* A set of variables. */
553 size_t (*get_cnt) (const struct var_set *);
554 struct variable *(*get_var) (const struct var_set *, size_t idx);
555 int (*lookup_var_idx) (const struct var_set *, const char *);
556 void (*destroy) (struct var_set *);
560 /* Returns the number of variables in VS. */
562 var_set_get_cnt (const struct var_set *vs)
566 return vs->get_cnt (vs);
569 /* Return variable with index IDX in VS.
570 IDX must be less than the number of variables in VS. */
572 var_set_get_var (const struct var_set *vs, size_t idx)
575 assert (idx < var_set_get_cnt (vs));
577 return vs->get_var (vs, idx);
580 /* Returns the variable in VS named NAME, or a null pointer if VS
581 contains no variable with that name. */
583 var_set_lookup_var (const struct var_set *vs, const char *name)
585 int idx = var_set_lookup_var_idx (vs, name);
586 return idx >= 0 ? var_set_get_var (vs, idx) : NULL;
589 /* Returns the index in VS of the variable named NAME, or -1 if
590 VS contains no variable with that name. */
592 var_set_lookup_var_idx (const struct var_set *vs, const char *name)
595 assert (name != NULL);
596 assert (strlen (name) <= LONG_NAME_LEN );
598 return vs->lookup_var_idx (vs, name);
603 var_set_destroy (struct var_set *vs)
609 /* Returns the number of variables in VS. */
611 dict_var_set_get_cnt (const struct var_set *vs)
613 struct dictionary *d = vs->aux;
615 return dict_get_var_cnt (d);
618 /* Return variable with index IDX in VS.
619 IDX must be less than the number of variables in VS. */
620 static struct variable *
621 dict_var_set_get_var (const struct var_set *vs, size_t idx)
623 struct dictionary *d = vs->aux;
625 return dict_get_var (d, idx);
628 /* Returns the index of the variable in VS named NAME, or -1 if
629 VS contains no variable with that name. */
631 dict_var_set_lookup_var_idx (const struct var_set *vs, const char *name)
633 struct dictionary *d = vs->aux;
634 struct variable *v = dict_lookup_var (d, name);
635 return v != NULL ? v->index : -1;
640 dict_var_set_destroy (struct var_set *vs)
645 /* Returns a variable set based on D. */
647 var_set_create_from_dict (const struct dictionary *d)
649 struct var_set *vs = xmalloc (sizeof *vs);
650 vs->get_cnt = dict_var_set_get_cnt;
651 vs->get_var = dict_var_set_get_var;
652 vs->lookup_var_idx = dict_var_set_lookup_var_idx;
653 vs->destroy = dict_var_set_destroy;
654 vs->aux = (void *) d;
658 /* A variable set based on an array. */
661 struct variable *const *var;/* Array of variables. */
662 size_t var_cnt; /* Number of elements in var. */
663 struct hsh_table *name_tab; /* Hash from variable names to variables. */
666 /* Returns the number of variables in VS. */
668 array_var_set_get_cnt (const struct var_set *vs)
670 struct array_var_set *avs = vs->aux;
675 /* Return variable with index IDX in VS.
676 IDX must be less than the number of variables in VS. */
677 static struct variable *
678 array_var_set_get_var (const struct var_set *vs, size_t idx)
680 struct array_var_set *avs = vs->aux;
682 return (struct variable *) avs->var[idx];
685 /* Returns the index of the variable in VS named NAME, or -1 if
686 VS contains no variable with that name. */
688 array_var_set_lookup_var_idx (const struct var_set *vs, const char *name)
690 struct array_var_set *avs = vs->aux;
691 struct variable v, *vp, *const *vpp;
693 strcpy (v.name, name);
695 vpp = hsh_find (avs->name_tab, &vp);
696 return vpp != NULL ? vpp - avs->var : -1;
701 array_var_set_destroy (struct var_set *vs)
703 struct array_var_set *avs = vs->aux;
705 hsh_destroy (avs->name_tab);
710 /* Returns a variable set based on the VAR_CNT variables in
713 var_set_create_from_array (struct variable *const *var, size_t var_cnt)
716 struct array_var_set *avs;
719 vs = xmalloc (sizeof *vs);
720 vs->get_cnt = array_var_set_get_cnt;
721 vs->get_var = array_var_set_get_var;
722 vs->lookup_var_idx = array_var_set_lookup_var_idx;
723 vs->destroy = array_var_set_destroy;
724 vs->aux = avs = xmalloc (sizeof *avs);
726 avs->var_cnt = var_cnt;
727 avs->name_tab = hsh_create (2 * var_cnt,
728 compare_var_ptr_names, hash_var_ptr_name, NULL,
730 for (i = 0; i < var_cnt; i++)
731 if (hsh_insert (avs->name_tab, (void *) &var[i]) != NULL)
733 var_set_destroy (vs);