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., 59 Temple Place - Suite 330, Boston, MA
21 #define file_handle_h 1
23 /* File handle provider (fhp).
25 This module provides file handles in the form of file_handle
26 structures to the dfm and sfm modules, which are known as file
27 handle users (fhusers). fhp does not know anything about file
36 FH_RF_FIXED, /* Fixed length records. */
37 FH_RF_VARIABLE, /* Variable length records. */
44 FH_MD_CHARACTER, /* Character data. */
46 FH_MD_BINARY, /* Character and/or binary data. */
47 FH_MD_MULTIPUNCH, /* Column binary data (not supported). */
53 /* Services that fhusers provide to fhp. */
56 int magic; /* Magic identifier for fhuser. */
57 const char *name; /* String identifier for fhuser. */
59 void (*close) (struct file_handle *);
60 /* Closes any associated file, etc. */
63 /* Opaque structure. The `ext' member is an exception for use by
64 subclasses. `where.ln' is also acceptable. */
67 /* name must be the first member. */
68 const char *name; /* File handle identifier. */
69 char *norm_fn; /* Normalized filename. */
70 char *fn; /* Filename as provided by user. */
71 struct file_locator where; /* Used for reporting error messages. */
73 int recform; /* One of FH_RF_*. */
74 size_t lrecl; /* Length of records for FH_RF_FIXED. */
75 int mode; /* One of FH_MD_*. */
77 struct fh_ext_class *class; /* Polymorphism support. */
78 void *ext; /* Extension struct for fhuser use. */
81 /* All the file handles in the system. */
82 extern struct avl_tree *files;
84 /* Pointer to the file handle that corresponds to data in the command
85 file entered via BEGIN DATA/END DATA. */
86 extern struct file_handle *inline_file;
88 /* Opening and closing handles. */
89 struct file_handle *fh_get_handle_by_name (const char name[9]);
90 struct file_handle *fh_get_handle_by_filename (const char *filename);
91 struct file_handle *fh_parse_file_handle (void);
92 void fh_close_handle (struct file_handle *handle);
95 const char *fh_handle_name (struct file_handle *handle);
96 char *fh_handle_filename (struct file_handle *handle);
97 size_t fh_record_width (struct file_handle *handle);
99 #endif /* !file_handle.h */