1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2006, 2010, 2012, 2014, 2015 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 ANY_READER_H 1
22 #include "data/case.h"
23 #include "libpspp/float-format.h"
24 #include "libpspp/integer-format.h"
32 const struct any_reader_class *klass;
35 struct any_reader_class
37 /* The name of this kind of data file, e.g. "SPSS System File". */
40 /* Detects whether FILE contains this type of file. Returns 1 if so, 0 if
41 not, and a negative errno value if there is an error reading FILE. */
42 int (*detect) (FILE *file);
44 struct any_reader *(*open) (struct file_handle *);
45 bool (*close) (struct any_reader *);
46 struct casereader *(*decode) (struct any_reader *, const char *encoding,
48 struct any_read_info *);
49 size_t (*get_strings) (const struct any_reader *, struct pool *pool,
50 char ***labels, bool **ids, char ***values);
53 extern const struct any_reader_class sys_file_reader_class;
54 extern const struct any_reader_class por_file_reader_class;
55 extern const struct any_reader_class pcp_file_reader_class;
59 ANY_SYS, /* SPSS System File. */
60 ANY_PCP, /* SPSS/PC+ System File. */
61 ANY_POR, /* SPSS Portable File. */
66 ANY_COMP_NONE, /* No compression. */
67 ANY_COMP_SIMPLE, /* Bytecode compression of integer values. */
68 ANY_COMP_ZLIB /* ZLIB "deflate" compression. */
71 /* Data file info that doesn't fit in struct dictionary.
73 The strings in this structure are encoded in UTF-8. (They are normally in
74 the ASCII subset of UTF-8.) */
77 const struct any_reader_class *klass;
80 enum integer_format integer_format;
81 enum float_format float_format;
82 enum any_compression compression;
83 casenumber n_cases; /* -1 if unknown. */
84 char *product; /* Product name. */
85 char *product_ext; /* Extra product info. */
87 /* Writer's version number in X.Y.Z format.
88 The version number is not always present; if not, then
89 all of these are set to 0. */
90 int version_major; /* X. */
91 int version_minor; /* Y. */
92 int version_revision; /* Z. */
95 void any_read_info_destroy (struct any_read_info *);
100 int any_reader_detect (const struct file_handle *file_name,
101 const struct any_reader_class **);
103 struct any_reader *any_reader_open (struct file_handle *);
104 bool any_reader_close (struct any_reader *);
105 struct casereader *any_reader_decode (struct any_reader *,
106 const char *encoding,
107 struct dictionary **,
108 struct any_read_info *);
109 size_t any_reader_get_strings (const struct any_reader *, struct pool *pool,
110 char ***labels, bool **ids, char ***values);
112 struct casereader *any_reader_open_and_decode (struct file_handle *,
113 const char *encoding,
114 struct dictionary **,
115 struct any_read_info *);
117 #endif /* any-reader.h */