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., 59 Temple Place - Suite 330, Boston, MA
25 #include "bitvector.h"
26 #include "dictionary.h"
33 /* Parses a name as a variable within VS and returns the variable
34 if successful. On failure emits an error message and returns
36 static struct variable *
37 parse_vs_variable (const struct var_set *vs)
43 lex_error ("expecting variable name");
47 vp = var_set_lookup_var (vs, tokid);
49 msg (SE, _("%s is not a variable name."), tokid);
55 /* Parses a variable name in dictionary D and returns the
56 variable if successful. On failure emits an error message and
57 returns a null pointer. */
59 parse_dict_variable (const struct dictionary *d)
61 struct var_set *vs = var_set_create_from_dict (d);
62 struct variable *var = parse_vs_variable (vs);
67 /* Parses a variable name in default_dict and returns the
68 variable if successful. On failure emits an error message and
69 returns a null pointer. */
73 return parse_dict_variable (default_dict);
76 /* Returns the dictionary class corresponding to a variable named
79 dict_class_from_id (const char *name)
81 assert (name != NULL);
94 /* Returns the name of dictionary class DICT_CLASS. */
96 dict_class_to_name (enum dict_class dict_class)
101 return _("ordinary");
112 /* Parses a set of variables from dictionary D given options
113 OPTS. Resulting list of variables stored in *VAR and the
114 number of variables into *CNT. Returns nonzero only if
117 parse_variables (const struct dictionary *d, struct variable ***var,
124 assert (var != NULL);
125 assert (cnt != NULL);
127 vs = var_set_create_from_dict (d);
128 success = parse_var_set_vars (vs, var, cnt, opts);
129 var_set_destroy (vs);
133 /* Note that if parse_variables() returns 0, *v is free()'d.
134 Conversely, if parse_variables() returns non-zero, then *nv is
135 nonzero and *v is non-NULL. */
137 parse_var_set_vars (const struct var_set *vs,
138 struct variable ***v, int *nv,
143 char *included = NULL;
145 struct variable *v1, *v2;
147 enum dict_class dict_class;
153 /* At most one of PV_NUMERIC, PV_STRING, PV_SAME_TYPE may be
155 assert ((((pv_opts & PV_NUMERIC) != 0)
156 + ((pv_opts & PV_STRING) != 0)
157 + ((pv_opts & PV_SAME_TYPE) != 0)) <= 1);
159 /* PV_DUPLICATE and PV_NO_DUPLICATE are incompatible. */
160 assert (!(pv_opts & PV_DUPLICATE) || !(pv_opts & PV_NO_DUPLICATE));
162 vs_var_cnt = var_set_get_cnt (vs);
164 if (!(pv_opts & PV_APPEND))
173 if (!(pv_opts & PV_DUPLICATE))
175 included = xmalloc (vs_var_cnt);
176 memset (included, 0, vs_var_cnt);
177 for (i = 0; i < *nv; i++)
178 included[(*v)[i]->index] = 1;
183 if (lex_match (T_ALL))
185 v1 = var_set_get_var (vs, 0);
186 v2 = var_set_get_var (vs, vs_var_cnt - 1);
188 dict_class = DC_ORDINARY;
192 v1 = parse_vs_variable (vs);
196 if (lex_match (T_TO))
198 enum dict_class dict_class_2;
200 v2 = parse_vs_variable (vs);
203 lex_error ("expecting variable name");
207 count = v2->index - v1->index + 1;
210 msg (SE, _("%s TO %s is not valid syntax since %s "
211 "precedes %s in the dictionary."),
212 v1->name, v2->name, v2->name, v1->name);
216 dict_class = dict_class_from_id (v1->name);
217 dict_class_2 = dict_class_from_id (v2->name);
218 if (dict_class != dict_class_2)
220 msg (SE, _("When using the TO keyword to specify several "
221 "variables, both variables must be from "
222 "the same variable dictionaries, of either "
223 "ordinary, scratch, or system variables. "
224 "%s is a %s variable, whereas %s is %s."),
225 v1->name, dict_class_to_name (dict_class),
226 v2->name, dict_class_to_name (dict_class_2));
234 dict_class = dict_class_from_id (v1->name);
236 if (dict_class == DC_SCRATCH && (pv_opts & PV_NO_SCRATCH))
238 msg (SE, _("Scratch variables (such as %s) are not allowed "
244 if (*nv + count > mv)
246 mv += ROUND_UP (count, 16);
247 *v = xrealloc (*v, mv * sizeof **v);
250 /* Add v1...v2 to the list. */
251 for (i = v1->index; i <= v2->index; i++)
253 struct variable *add = var_set_get_var (vs, i);
255 /* Skip over other dictionaries. */
256 if (dict_class != dict_class_from_id (add->name))
259 /* Different kinds of errors. */
260 if ((pv_opts & PV_NUMERIC) && add->type != NUMERIC)
261 msg (SW, _("%s is not a numeric variable. It will not be "
262 "included in the variable list."), add->name);
263 else if ((pv_opts & PV_STRING) && add->type != ALPHA)
264 msg (SE, _("%s is not a string variable. It will not be "
265 "included in the variable list."), add->name);
266 else if ((pv_opts & PV_SAME_TYPE) && *nv
267 && add->type != (*v)[0]->type)
268 msg (SE, _("%s and %s are not the same type. All variables in "
269 "this variable list must be of the same type. %s "
270 "will be omitted from list."),
271 (*v)[0]->name, add->name, add->name);
272 else if ((pv_opts & PV_NO_DUPLICATE) && included[add->index])
273 msg (SE, _("Variable %s appears twice in variable list."),
276 /* Success--add the variable to the list. */
277 if ((pv_opts & PV_DUPLICATE) || !included[add->index])
279 (*v)[(*nv)++] = var_set_get_var (vs, i);
280 if (!(pv_opts & PV_DUPLICATE))
281 included[add->index] = 1;
288 /* Arrive here only on failure. */
289 if (pv_opts & PV_SINGLE)
293 /* We finished adding v1...v2 to the list. */
294 if (pv_opts & PV_SINGLE)
298 while ((token == T_ID && var_set_lookup_var (vs, tokid) != NULL)
301 if (!(pv_opts & PV_DUPLICATE))
311 if (!(pv_opts & PV_DUPLICATE))
316 /* Extracts a numeric suffix from variable name S, copying it
317 into string R. Sets *D to the length of R and *N to its
320 extract_num (char *s, char *r, int *n, int *d)
324 /* Find first digit. */
325 cp = s + strlen (s) - 1;
326 while (isdigit ((unsigned char) *cp) && cp > s)
331 strncpy (r, s, cp - s);
334 /* Count initial zeros. */
343 while (isdigit ((unsigned char) *cp))
346 *n = (*n * 10) + (*cp - '0');
351 if (*n == 0 && *d == 0)
353 msg (SE, _("incorrect use of TO convention"));
359 /* Parses a list of variable names according to the DATA LIST version
360 of the TO convention. */
362 parse_DATA_LIST_vars (char ***names, int *nnames, int pv_opts)
372 assert (names != NULL);
373 assert (nnames != NULL);
374 assert ((pv_opts & ~(PV_APPEND | PV_SINGLE
375 | PV_NO_SCRATCH | PV_NO_DUPLICATE)) == 0);
376 /* FIXME: PV_NO_DUPLICATE is not implemented. */
378 if (pv_opts & PV_APPEND)
379 nvar = mvar = *nnames;
386 name1 = xmalloc (36);
387 name2 = &name1[1 * 9];
388 root1 = &name1[2 * 9];
389 root2 = &name1[3 * 9];
394 lex_error ("expecting variable name");
397 if (dict_class_from_id (tokid) == DC_SCRATCH
398 && (pv_opts & PV_NO_SCRATCH))
400 msg (SE, _("Scratch variables not allowed here."));
403 strcpy (name1, tokid);
410 lex_error ("expecting variable name");
413 strcpy (name2, tokid);
416 if (!extract_num (name1, root1, &n1, &d1)
417 || !extract_num (name2, root2, &n2, &d2))
420 if (strcmp (root1, root2))
422 msg (SE, _("Prefixes don't match in use of TO convention."));
427 msg (SE, _("Bad bounds in use of TO convention."));
433 if (mvar < nvar + (n2 - n1 + 1))
435 mvar += ROUND_UP (n2 - n1 + 1, 16);
436 *names = xrealloc (*names, mvar * sizeof **names);
439 for (n = n1; n <= n2; n++)
441 (*names)[nvar] = xmalloc (9);
442 sprintf ((*names)[nvar], "%s%0*d", root1, d1, n);
451 *names = xrealloc (*names, mvar * sizeof **names);
453 (*names)[nvar++] = xstrdup (name1);
458 if (pv_opts & PV_SINGLE)
461 while (token == T_ID);
470 for (i = 0; i < nvar; i++)
479 /* Parses a list of variables where some of the variables may be
480 existing and the rest are to be created. Same args as
481 parse_DATA_LIST_vars(). */
483 parse_mixed_vars (char ***names, int *nnames, int pv_opts)
487 assert (names != NULL);
488 assert (nnames != NULL);
489 assert ((pv_opts & ~PV_APPEND) == 0);
491 if (!(pv_opts & PV_APPEND))
496 while (token == T_ID || token == T_ALL)
498 if (token == T_ALL || dict_lookup_var (default_dict, tokid) != NULL)
503 if (!parse_variables (default_dict, &v, &nv, PV_NONE))
505 *names = xrealloc (*names, (*nnames + nv) * sizeof **names);
506 for (i = 0; i < nv; i++)
507 (*names)[*nnames + i] = xstrdup (v[i]->name);
511 else if (!parse_DATA_LIST_vars (names, nnames, PV_APPEND))
517 for (i = 0; i < *nnames; i++)
518 free ((*names)[*nnames]);
525 /* A set of variables. */
528 size_t (*get_cnt) (const struct var_set *);
529 struct variable *(*get_var) (const struct var_set *, size_t idx);
530 struct variable *(*lookup_var) (const struct var_set *, const char *);
531 void (*destroy) (struct var_set *);
535 /* Returns the number of variables in VS. */
537 var_set_get_cnt (const struct var_set *vs)
541 return vs->get_cnt (vs);
544 /* Return variable with index IDX in VS.
545 IDX must be less than the number of variables in VS. */
547 var_set_get_var (const struct var_set *vs, size_t idx)
550 assert (idx < var_set_get_cnt (vs));
552 return vs->get_var (vs, idx);
555 /* Returns the variable in VS named NAME, or a null pointer if VS
556 contains no variable with that name. */
558 var_set_lookup_var (const struct var_set *vs, const char *name)
561 assert (name != NULL);
562 assert (strlen (name) < 9);
564 return vs->lookup_var (vs, name);
569 var_set_destroy (struct var_set *vs)
575 /* Returns the number of variables in VS. */
577 dict_var_set_get_cnt (const struct var_set *vs)
579 struct dictionary *d = vs->aux;
581 return dict_get_var_cnt (d);
584 /* Return variable with index IDX in VS.
585 IDX must be less than the number of variables in VS. */
586 static struct variable *
587 dict_var_set_get_var (const struct var_set *vs, size_t idx)
589 struct dictionary *d = vs->aux;
591 return dict_get_var (d, idx);
594 /* Returns the variable in VS named NAME, or a null pointer if VS
595 contains no variable with that name. */
596 static struct variable *
597 dict_var_set_lookup_var (const struct var_set *vs, const char *name)
599 struct dictionary *d = vs->aux;
601 return dict_lookup_var (d, name);
606 dict_var_set_destroy (struct var_set *vs)
611 /* Returns a variable set based on D. */
613 var_set_create_from_dict (const struct dictionary *d)
615 struct var_set *vs = xmalloc (sizeof *vs);
616 vs->get_cnt = dict_var_set_get_cnt;
617 vs->get_var = dict_var_set_get_var;
618 vs->lookup_var = dict_var_set_lookup_var;
619 vs->destroy = dict_var_set_destroy;
620 vs->aux = (void *) d;
624 /* A variable set based on an array. */
627 struct variable *const *var;/* Array of variables. */
628 size_t var_cnt; /* Number of elements in var. */
629 struct hsh_table *name_tab; /* Hash from variable names to variables. */
632 /* Returns the number of variables in VS. */
634 array_var_set_get_cnt (const struct var_set *vs)
636 struct array_var_set *avs = vs->aux;
641 /* Return variable with index IDX in VS.
642 IDX must be less than the number of variables in VS. */
643 static struct variable *
644 array_var_set_get_var (const struct var_set *vs, size_t idx)
646 struct array_var_set *avs = vs->aux;
648 return (struct variable *) avs->var[idx];
651 /* Returns the variable in VS named NAME, or a null pointer if VS
652 contains no variable with that name. */
653 static struct variable *
654 array_var_set_lookup_var (const struct var_set *vs, const char *name)
656 struct array_var_set *avs = vs->aux;
659 strcpy (v.name, name);
661 return hsh_find (avs->name_tab, &v);
666 array_var_set_destroy (struct var_set *vs)
668 struct array_var_set *avs = vs->aux;
670 hsh_destroy (avs->name_tab);
675 /* Returns a variable set based on the VAR_CNT variables in
678 var_set_create_from_array (struct variable *const *var, size_t var_cnt)
681 struct array_var_set *avs;
684 vs = xmalloc (sizeof *vs);
685 vs->get_cnt = array_var_set_get_cnt;
686 vs->get_var = array_var_set_get_var;
687 vs->lookup_var = array_var_set_lookup_var;
688 vs->destroy = array_var_set_destroy;
689 vs->aux = avs = xmalloc (sizeof *avs);
691 avs->var_cnt = var_cnt;
692 avs->name_tab = hsh_create (2 * var_cnt,
693 compare_variables, hash_variable, NULL,
695 for (i = 0; i < var_cnt; i++)
696 if (hsh_insert (avs->name_tab, (void *) var[i]) != NULL)
698 var_set_destroy (vs);