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
28 #include "missing-values.h"
31 /* Script variables. */
36 NUMERIC, /* A numeric variable. */
37 ALPHA /* A string variable.
38 (STRING is pre-empted by lexer.h.) */
41 /* A variable's dictionary entry. */
44 /* Basic information. */
45 char name[LONG_NAME_LEN + 1]; /* Variable name. Mixed case. */
46 int type; /* NUMERIC or ALPHA. */
47 int width; /* Size of string variables in chars. */
48 int fv, nv; /* Index into `value's, number of values. */
49 unsigned init : 1; /* 1=VFM must init and possibly reinit. */
50 unsigned reinit : 1; /* Cases are: 1=reinitialized; 0=left. */
52 /* Data for use by containing dictionary. */
53 int index; /* Dictionary index. */
56 struct missing_values miss; /* Missing values. */
58 /* Display formats. */
59 struct fmt_spec print; /* Default format for PRINT. */
60 struct fmt_spec write; /* Default format for WRITE. */
63 struct val_labs *val_labs; /* Value labels. */
64 char *label; /* Variable label. */
66 /* GUI display parameters. */
67 enum measure measure; /* Nominal ordinal or continuous */
68 int display_width; /* Width of data editor column */
69 enum alignment alignment; /* Alignment of data in gui */
71 /* Short name, used only for system and portable file input
72 and output. Upper case only. There is no index for short
73 names. Short names are not necessarily unique. Any
74 variable may have no short name, indicated by an empty
76 char short_name[SHORT_NAME_LEN + 1];
78 /* Per-command info. */
80 void (*aux_dtor) (struct variable *);
84 bool var_is_valid_name (const char *, bool issue_error);
85 int compare_var_names (const void *, const void *, void *);
86 unsigned hash_var_name (const void *, void *);
89 void var_set_short_name (struct variable *, const char *);
90 void var_set_short_name_suffix (struct variable *, const char *, int suffix);
91 void var_clear_short_name (struct variable *);
93 /* Pointers to `struct variable', by name. */
94 int compare_var_ptr_names (const void *, const void *, void *);
95 unsigned hash_var_ptr_name (const void *, void *);
97 /* Variable auxiliary data. */
98 void *var_attach_aux (struct variable *,
99 void *aux, void (*aux_dtor) (struct variable *));
100 void var_clear_aux (struct variable *);
101 void *var_detach_aux (struct variable *);
102 void var_dtor_free (struct variable *);
104 /* Classes of variables. */
107 DC_ORDINARY, /* Ordinary identifier. */
108 DC_SYSTEM, /* System variable. */
109 DC_SCRATCH /* Scratch variable. */
112 enum dict_class dict_class_from_id (const char *name);
113 const char *dict_class_to_name (enum dict_class dict_class);
115 /* Vector of variables. */
118 int idx; /* Index for dict_get_vector(). */
119 char name[LONG_NAME_LEN + 1]; /* Name. */
120 struct variable **var; /* Vector of variables. */
121 int cnt; /* Number of variables. */
124 void discard_variables (void);
126 /* This is the active file dictionary. */
127 extern struct dictionary *default_dict;
129 /* Transformation state. */
131 /* Default file handle for DATA LIST, REREAD, REPEATING DATA
133 extern struct file_handle *default_handle;
135 /* PROCESS IF expression. */
136 extern struct expression *process_if_expr;
138 /* TEMPORARY support. */
140 /* 1=TEMPORARY has been executed at some point. */
141 extern int temporary;
143 /* If temporary!=0, the saved dictionary. */
144 extern struct dictionary *temp_dict;
146 /* If temporary!=0, index into t_trns[] (declared far below) that
147 gives the point at which data should be written out. -1 means that
148 the data shouldn't be changed since all transformations are
150 extern int temp_trns;
152 /* If FILTER is active, whether it was executed before or after
154 extern int FILTER_before_TEMPORARY;
156 void cancel_temporary (void);
159 void dump_split_vars (const struct ccase *);
161 /* Transformations. */
164 typedef int trns_proc_func (struct trns_header *, struct ccase *, int);
165 typedef void trns_free_func (struct trns_header *);
167 /* Header for all transformations. */
170 int index; /* Index into t_trns[]. */
171 trns_proc_func *proc; /* Transformation proc. */
172 trns_free_func *free; /* Garbage collector proc. */
175 /* Array of transformations */
176 extern struct trns_header **t_trns;
178 /* Number of transformations, maximum number in array currently. */
179 extern int n_trns, m_trns;
181 /* Index of first transformation that is really a transformation. Any
182 transformations before this belong to INPUT PROGRAM. */
185 void add_transformation (struct trns_header *trns);
186 void cancel_transformations (void);
190 struct var_set *var_set_create_from_dict (const struct dictionary *d);
191 struct var_set *var_set_create_from_array (struct variable *const *var,
194 size_t var_set_get_cnt (const struct var_set *vs);
195 struct variable *var_set_get_var (const struct var_set *vs, size_t idx);
196 struct variable *var_set_lookup_var (const struct var_set *vs,
198 int var_set_lookup_var_idx (const struct var_set *vs, const char *name);
199 void var_set_destroy (struct var_set *vs);
201 /* Variable parsers. */
205 PV_NONE = 0, /* No options. */
206 PV_SINGLE = 0001, /* Restrict to a single name or TO use. */
207 PV_DUPLICATE = 0002, /* Don't merge duplicates. */
208 PV_APPEND = 0004, /* Append to existing list. */
209 PV_NO_DUPLICATE = 0010, /* Error on duplicates. */
210 PV_NUMERIC = 0020, /* Vars must be numeric. */
211 PV_STRING = 0040, /* Vars must be string. */
212 PV_SAME_TYPE = 00100, /* All vars must be the same type. */
213 PV_NO_SCRATCH = 00200 /* Disallow scratch variables. */
216 struct variable *parse_variable (void);
217 struct variable *parse_dict_variable (const struct dictionary *);
218 int parse_variables (const struct dictionary *, struct variable ***, int *,
220 int parse_var_set_vars (const struct var_set *, struct variable ***, int *,
222 int parse_DATA_LIST_vars (char ***names, int *cnt, int opts);
223 int parse_mixed_vars (char ***names, int *cnt, int opts);
227 /* Return a string representing this variable, in the form most
228 appropriate from a human factors perspective.
229 (IE: the label if it has one, otherwise the name )
231 const char * var_to_string(const struct variable *var);