1 /* PSPP - computes sample statistics.
2 Copyright (C) 2004 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
27 /* Opaque structure that represents a case. Use accessor
28 functions instead of accessing any members directly. Use
29 case_move() or case_clone() instead of copying. */
32 struct case_data *case_data; /* Actual data. */
35 /* Invisible to user code. */
38 size_t value_cnt; /* Number of values. */
39 unsigned ref_cnt; /* Reference count. */
40 union value values[1]; /* Values. */
46 #define CASE_INLINE static
49 CASE_INLINE void case_nullify (struct ccase *);
50 CASE_INLINE int case_is_null (const struct ccase *);
52 void case_create (struct ccase *, size_t value_cnt);
53 CASE_INLINE void case_clone (struct ccase *, const struct ccase *);
54 CASE_INLINE void case_move (struct ccase *, struct ccase *);
55 CASE_INLINE void case_destroy (struct ccase *);
57 void case_resize (struct ccase *, size_t old_cnt, size_t new_cnt);
58 void case_swap (struct ccase *, struct ccase *);
60 bool case_try_create (struct ccase *, size_t value_cnt);
61 bool case_try_clone (struct ccase *, const struct ccase *);
63 CASE_INLINE void case_copy (struct ccase *dst, size_t dst_idx,
64 const struct ccase *src, size_t src_idx,
67 CASE_INLINE void case_to_values (const struct ccase *, union value *, size_t);
68 CASE_INLINE void case_from_values (struct ccase *,
69 const union value *, size_t);
71 CASE_INLINE const union value *case_data (const struct ccase *, size_t idx);
72 CASE_INLINE double case_num (const struct ccase *, size_t idx);
73 CASE_INLINE const char *case_str (const struct ccase *, size_t idx);
75 CASE_INLINE union value *case_data_rw (struct ccase *, size_t idx);
78 int case_compare (const struct ccase *, const struct ccase *,
79 struct variable *const *, size_t var_cnt);
80 int case_compare_2dict (const struct ccase *, const struct ccase *,
81 struct variable *const *, struct variable *const *,
84 const union value *case_data_all (const struct ccase *);
85 union value *case_data_all_rw (struct ccase *);
87 void case_unshare (struct ccase *);
91 #include <libpspp/str.h>
94 case_nullify (struct ccase *c)
100 case_is_null (const struct ccase *c)
102 return c->case_data == NULL;
106 case_clone (struct ccase *clone, const struct ccase *orig)
109 orig->case_data->ref_cnt++;
113 case_move (struct ccase *dst, struct ccase *src)
118 src->case_data = NULL;
123 case_destroy (struct ccase *c)
125 struct case_data *cd = c->case_data;
126 if (cd != NULL && --cd->ref_cnt == 0)
131 case_copy (struct ccase *dst, size_t dst_idx,
132 const struct ccase *src, size_t src_idx,
135 if (dst->case_data != src->case_data || dst_idx != src_idx)
137 if (dst->case_data->ref_cnt > 1)
139 memmove (dst->case_data->values + dst_idx,
140 src->case_data->values + src_idx,
141 sizeof *dst->case_data->values * value_cnt);
146 case_to_values (const struct ccase *c, union value *output,
149 memcpy (output, c->case_data->values,
150 output_size * sizeof *output);
154 case_from_values (struct ccase *c, const union value *input,
155 size_t input_size UNUSED)
157 if (c->case_data->ref_cnt > 1)
159 memcpy (c->case_data->values, input,
160 c->case_data->value_cnt * sizeof *input);
163 static inline const union value *
164 case_data (const struct ccase *c, size_t idx)
166 return &c->case_data->values[idx];
170 case_num (const struct ccase *c, size_t idx)
172 return c->case_data->values[idx].f;
175 static inline const char *
176 case_str (const struct ccase *c, size_t idx)
178 return c->case_data->values[idx].s;
181 static inline union value *
182 case_data_rw (struct ccase *c, size_t idx)
184 if (c->case_data->ref_cnt > 1)
186 return &c->case_data->values[idx];
188 #endif /* !DEBUGGING */