1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2006, 2010, 2011, 2012 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/>. */
19 #include "data/vector.h"
23 #include "data/dictionary.h"
24 #include "data/identifier.h"
25 #include "data/variable.h"
26 #include "libpspp/assertion.h"
27 #include "libpspp/i18n.h"
28 #include "libpspp/pxd.h"
29 #include "libpspp/str.h"
31 #include "gl/xalloc.h"
33 /* Vector of variables. */
36 char *name; /* Name. */
37 struct variable **vars; /* Set of variables. */
38 size_t var_cnt; /* Number of variables. */
41 /* Checks that all the variables in VECTOR have consistent
44 check_widths (const struct vector *vector)
46 int width = var_get_width (vector->vars[0]);
49 for (i = 1; i < vector->var_cnt; i++)
50 assert (width == var_get_width (vector->vars[i]));
53 /* Creates and returns a new vector with the given UTF-8 encoded NAME
54 that contains the VAR_CNT variables in VARS.
55 All variables in VARS must have the same type and width. */
57 vector_create (const char *name, struct variable **vars, size_t var_cnt)
59 struct vector *vector = xmalloc (sizeof *vector);
62 assert (id_is_plausible (name, false));
63 vector->name = xstrdup (name);
65 vector->name = xstrdup (name);
66 vector->vars = xmemdup (vars, var_cnt * sizeof *vector->vars);
67 vector->var_cnt = var_cnt;
68 check_widths (vector);
73 /* Creates and returns a new vector as a clone of OLD, but that
74 contains variables from NEW_DICT that are in the same position
75 as those in OLD are in OLD_DICT.
76 All variables in the new vector must have the same type and
79 vector_clone (const struct vector *old,
80 const struct dictionary *old_dict,
81 const struct dictionary *new_dict)
83 struct vector *new = xmalloc (sizeof *new);
86 new->name = xstrdup (old->name);
87 new->vars = xnmalloc (old->var_cnt, sizeof *new->vars);
88 new->var_cnt = old->var_cnt;
89 for (i = 0; i < new->var_cnt; i++)
91 assert (dict_contains_var (old_dict, old->vars[i]));
92 new->vars[i] = dict_get_var (new_dict,
93 var_get_dict_index (old->vars[i]));
100 /* Destroys VECTOR. */
102 vector_destroy (struct vector *vector)
109 /* Returns VECTOR's name, as a UTF-8 encoded string. */
111 vector_get_name (const struct vector *vector)
116 /* Returns the type of the variables in VECTOR. */
117 enum val_type vector_get_type (const struct vector *vector)
119 return var_get_type (vector->vars[0]);
122 /* Returns the variable in VECTOR with the given INDEX. */
124 vector_get_var (const struct vector *vector, size_t index)
126 assert (index < vector->var_cnt);
127 return vector->vars[index];
130 /* Returns the number of variables in VECTOR. */
132 vector_get_var_cnt (const struct vector *vector)
134 return vector->var_cnt;
137 /* Compares two pointers to vectors represented by A and B and
138 returns a strcmp()-type result. */
140 compare_vector_ptrs_by_name (const void *a_, const void *b_)
142 struct vector *const *pa = a_;
143 struct vector *const *pb = b_;
144 struct vector *a = *pa;
145 struct vector *b = *pb;
147 return utf8_strcasecmp (a->name, b->name);
151 vector_save (const struct vector *vector, struct pxd *pxd)
153 struct pxd_builder b;
156 pxd_builder_init (&b, pxd);
158 pxd_builder_put_string (&b, vector->name);
160 pxd_builder_put_size_t (&b, vector->var_cnt);
161 for (i = 0; i < vector->var_cnt; i++)
162 pxd_builder_put_size_t (&b, var_get_dict_index (vector->vars[i]));
164 return pxd_builder_commit (&b);
168 vector_load (struct pxd_object *object, const struct pxd *pxd,
169 const struct dictionary *dict)
172 struct vector *vector;
175 vector = xzalloc (sizeof *vector);
177 pxd_parser_init (&p, object, pxd);
179 vector->name = pxd_parser_get_string (&p);
181 vector->var_cnt = pxd_parser_get_size_t (&p);
182 vector->vars = xmalloc (vector->var_cnt * sizeof *vector->vars);
183 for (i = 0; i < vector->var_cnt; i++)
184 vector->vars[i] = dict_get_var (dict, pxd_parser_get_size_t (&p));