1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 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/>. */
18 #define DATA_FORMAT_H 1
20 /* Display format types. */
24 #include "data/val-type.h"
25 #include "libpspp/str.h"
29 /* How a format is going to be used. */
32 FMT_FOR_INPUT, /* For parsing data input, e.g. data_in(). */
33 FMT_FOR_OUTPUT /* For formatting data output, e.g. data_out(). */
36 /* Format type categories.
38 Each format is in exactly one category. We give categories
39 bitwise disjoint values only to enable bitwise comparisons
40 against a mask of FMT_CAT_* values, not to allow multiple
41 categories per format. */
44 /* Numeric formats. */
45 FMT_CAT_BASIC = 0x001, /* Basic numeric formats. */
46 FMT_CAT_CUSTOM = 0x002, /* Custom currency formats. */
47 FMT_CAT_LEGACY = 0x004, /* Legacy numeric formats. */
48 FMT_CAT_BINARY = 0x008, /* Binary formats. */
49 FMT_CAT_HEXADECIMAL = 0x010, /* Hexadecimal formats. */
50 FMT_CAT_DATE = 0x020, /* Date formats. */
51 FMT_CAT_TIME = 0x040, /* Time formats. */
52 FMT_CAT_DATE_COMPONENT = 0x080, /* Date component formats. */
55 FMT_CAT_STRING = 0x100 /* String formats. */
59 enum ATTRIBUTE ((packed)) fmt_type
61 #define FMT(NAME, METHOD, IMIN, OMIN, IO, CATEGORY) FMT_##NAME,
63 FMT_NUMBER_OF_FORMATS,
66 /* Length of longest format specifier name,
67 not including terminating null. */
68 #define FMT_TYPE_LEN_MAX 8
70 /* Length of longest string representation of fmt_spec,
71 not including terminating null. */
72 #define FMT_STRING_LEN_MAX 32
77 enum fmt_type type; /* One of FMT_*. */
78 uint8_t d; /* Number of decimal places. */
79 uint16_t w; /* Width. */
82 /* Maximum width of any numeric format. */
83 #define FMT_MAX_NUMERIC_WIDTH 40
85 /* Constructing formats. */
86 struct fmt_spec fmt_for_input (enum fmt_type, int w, int d) PURE_FUNCTION;
87 struct fmt_spec fmt_for_output (enum fmt_type, int w, int d) PURE_FUNCTION;
88 struct fmt_spec fmt_for_output_from_input (const struct fmt_spec *,
89 const struct fmt_settings *);
90 struct fmt_spec fmt_default_for_width (int width);
92 /* Verifying formats. */
93 bool fmt_check (const struct fmt_spec *, enum fmt_use);
94 bool fmt_check_input (const struct fmt_spec *);
95 bool fmt_check_output (const struct fmt_spec *);
96 bool fmt_check_type_compat (const struct fmt_spec *, enum val_type);
97 bool fmt_check_width_compat (const struct fmt_spec *, int var_width);
99 /* Working with formats. */
100 int fmt_var_width (const struct fmt_spec *);
101 char *fmt_to_string (const struct fmt_spec *, char s[FMT_STRING_LEN_MAX + 1]);
102 bool fmt_equal (const struct fmt_spec *, const struct fmt_spec *);
103 bool fmt_resize (struct fmt_spec *, int new_width);
105 void fmt_fix (struct fmt_spec *, enum fmt_use);
106 void fmt_fix_input (struct fmt_spec *);
107 void fmt_fix_output (struct fmt_spec *);
109 void fmt_change_width (struct fmt_spec *, int width, enum fmt_use);
110 void fmt_change_decimals (struct fmt_spec *, int decimals, enum fmt_use);
113 bool is_fmt_type (enum fmt_type);
115 const char *fmt_name (enum fmt_type) PURE_FUNCTION;
116 bool fmt_from_name (const char *name, enum fmt_type *);
118 bool fmt_takes_decimals (enum fmt_type) PURE_FUNCTION;
120 int fmt_min_width (enum fmt_type, enum fmt_use) PURE_FUNCTION;
121 int fmt_max_width (enum fmt_type, enum fmt_use) PURE_FUNCTION;
122 int fmt_max_decimals (enum fmt_type, int width, enum fmt_use) PURE_FUNCTION;
123 int fmt_min_input_width (enum fmt_type) PURE_FUNCTION;
124 int fmt_max_input_width (enum fmt_type) PURE_FUNCTION;
125 int fmt_max_input_decimals (enum fmt_type, int width) PURE_FUNCTION;
126 int fmt_min_output_width (enum fmt_type) PURE_FUNCTION;
127 int fmt_max_output_width (enum fmt_type) PURE_FUNCTION;
128 int fmt_max_output_decimals (enum fmt_type, int width) PURE_FUNCTION;
129 int fmt_step_width (enum fmt_type) PURE_FUNCTION;
131 bool fmt_is_string (enum fmt_type) PURE_FUNCTION;
132 bool fmt_is_numeric (enum fmt_type) PURE_FUNCTION;
133 enum fmt_category fmt_get_category (enum fmt_type) PURE_FUNCTION;
135 enum fmt_type fmt_input_to_output (enum fmt_type) PURE_FUNCTION;
136 bool fmt_usable_for_input (enum fmt_type) PURE_FUNCTION;
138 int fmt_to_io (enum fmt_type) PURE_FUNCTION;
139 bool fmt_from_io (int io, enum fmt_type *);
140 bool fmt_from_u32 (uint32_t, int var_width, bool loose, struct fmt_spec *);
142 const char *fmt_date_template (enum fmt_type, int width) PURE_FUNCTION;
143 const char *fmt_gui_name (enum fmt_type);
145 /* A prefix or suffix for a numeric output format. */
148 char *s; /* String contents of affix, in UTF-8. */
149 int width; /* Display width in columns (see wcwidth()). */
152 /* A numeric output style. This can express the basic numeric formats (in the
153 FMT_CAT_BASIC category) and custom currency formats (FMT_CCx). */
154 struct fmt_number_style
156 struct fmt_affix neg_prefix; /* Negative prefix. */
157 struct fmt_affix prefix; /* Prefix. */
158 struct fmt_affix suffix; /* Suffix. */
159 struct fmt_affix neg_suffix; /* Negative suffix. */
160 char decimal; /* Decimal point: '.' or ','. */
161 char grouping; /* Grouping character: ',', '.', or 0. */
163 /* A fmt_affix may require more bytes than its display width; for example,
164 U+00A5 (¥) is 2 bytes in UTF-8 but occupies only one display column.
165 This member is the sum of the number of bytes required by all of the
166 fmt_affix members in this struct, minus their display widths. Thus, it
167 can be used to size memory allocations: for example, the formatted
168 result of CCA20.5 requires no more than (20 + extra_bytes) bytes in
173 struct fmt_number_style *fmt_number_style_from_string (const char *);
174 struct fmt_number_style *fmt_number_style_clone (
175 const struct fmt_number_style *);
176 void fmt_number_style_destroy (struct fmt_number_style *);
178 char *fmt_number_style_to_string (const struct fmt_number_style *);
180 int fmt_affix_width (const struct fmt_number_style *);
181 int fmt_neg_affix_width (const struct fmt_number_style *);
183 /* Number of custom currency styles. */
184 #define FMT_N_CCS 5 /* FMT_CCA through FMT_CCE. */
188 int epoch; /* 0 for default epoch. */
189 char decimal; /* '.' or ','. */
190 struct fmt_number_style *ccs[FMT_N_CCS]; /* CCA through CCE. */
192 #define FMT_SETTINGS_INIT { .decimal = '.' }
194 void fmt_settings_init (struct fmt_settings *);
195 void fmt_settings_uninit (struct fmt_settings *);
196 struct fmt_settings fmt_settings_copy (const struct fmt_settings *);
198 const struct fmt_number_style *fmt_settings_get_style (
199 const struct fmt_settings *, enum fmt_type);
200 int fmt_settings_get_epoch (const struct fmt_settings *);
202 void fmt_settings_set_cc (struct fmt_settings *, enum fmt_type,
203 struct fmt_number_style *);
205 extern const struct fmt_spec F_8_0 ;
206 extern const struct fmt_spec F_8_2 ;
207 extern const struct fmt_spec F_4_3 ;
208 extern const struct fmt_spec F_5_1 ;
210 #endif /* data/format.h */