1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 1997-9, 2000, 2006 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 #include <language/data-io/file-handle.h>
19 #include <libpspp/message.h>
22 #include <libpspp/alloc.h>
23 #include <data/file-name.h>
24 #include <language/command.h>
25 #include <language/lexer/lexer.h>
26 #include <libpspp/assertion.h>
27 #include <libpspp/message.h>
28 #include <libpspp/str.h>
29 #include <data/variable.h>
30 #include <data/file-handle-def.h>
33 #define _(msgid) gettext (msgid)
42 tabwidth=integer "x>=0" "%s must be nonnegative";
43 mode=mode:!character/image/scratch.
49 cmd_file_handle (struct lexer *lexer, struct dataset *ds)
51 char handle_name[LONG_NAME_LEN + 1];
52 struct fh_properties properties = *fh_default_properties ();
54 struct cmd_file_handle cmd;
55 struct file_handle *handle;
57 if (!lex_force_id (lexer))
58 return CMD_CASCADING_FAILURE;
59 str_copy_trunc (handle_name, sizeof handle_name, lex_tokid (lexer));
61 handle = fh_from_id (handle_name);
64 msg (SE, _("File handle %s is already defined. "
65 "Use CLOSE FILE HANDLE before redefining a file handle."),
67 return CMD_CASCADING_FAILURE;
71 if (!lex_force_match (lexer, '/'))
72 return CMD_CASCADING_FAILURE;
74 if (!parse_file_handle (lexer, ds, &cmd, NULL))
75 return CMD_CASCADING_FAILURE;
77 if (lex_end_of_command (lexer) != CMD_SUCCESS)
80 if (cmd.s_name == NULL && cmd.mode != FH_SCRATCH)
82 lex_sbc_missing (lexer, "NAME");
89 properties.mode = FH_MODE_TEXT;
91 properties.tab_width = cmd.n_tabwidth[0];
94 properties.mode = FH_MODE_BINARY;
95 if (cmd.n_lrecl[0] == LONG_MIN)
96 msg (SE, _("Fixed-length records were specified on /RECFORM, but "
97 "record length was not specified on /LRECL. "
98 "Assuming %u-character records."),
99 (unsigned int) properties.record_width);
100 else if (cmd.n_lrecl[0] < 1)
101 msg (SE, _("Record length (%ld) must be at least one byte. "
102 "Assuming %u-character records."),
103 cmd.n_lrecl[0], (unsigned int) properties.record_width);
105 properties.record_width = cmd.n_lrecl[0];
111 if (cmd.mode != FH_SCRATCH)
112 fh_create_file (handle_name, cmd.s_name, &properties);
114 fh_create_scratch (handle_name);
116 free_file_handle (&cmd);
120 free_file_handle (&cmd);
121 return CMD_CASCADING_FAILURE;
125 cmd_close_file_handle (struct lexer *lexer, struct dataset *ds UNUSED)
127 struct file_handle *handle;
129 if (!lex_force_id (lexer))
130 return CMD_CASCADING_FAILURE;
131 handle = fh_from_id (lex_tokid (lexer));
133 return CMD_CASCADING_FAILURE;
140 /* Returns the name for REFERENT. */
142 referent_name (enum fh_referent referent)
149 return _("inline file");
151 return _("scratch file");
157 /* Parses a file handle name, which may be a file name as a string
158 or a file handle name as an identifier. The allowed types of
159 file handle are restricted to those in REFERENT_MASK. Returns
160 the file handle when successful, a null pointer on failure. */
162 fh_parse (struct lexer *lexer, enum fh_referent referent_mask)
164 struct file_handle *handle;
166 if (lex_match_id (lexer, "INLINE"))
167 handle = fh_inline_file ();
170 if (lex_token (lexer) != T_ID && lex_token (lexer) != T_STRING)
172 lex_error (lexer, _("expecting a file name or handle name"));
177 if (lex_token (lexer) == T_ID)
178 handle = fh_from_id (lex_tokid (lexer));
180 handle = fh_from_file_name (ds_cstr (lex_tokstr (lexer)));
183 if (lex_token (lexer) != T_ID || lex_tokid (lexer)[0] != '#' || get_syntax () != ENHANCED)
184 handle = fh_create_file (NULL, ds_cstr (lex_tokstr (lexer)),
185 fh_default_properties ());
187 handle = fh_create_scratch (lex_tokid (lexer));
192 if (!(fh_get_referent (handle) & referent_mask))
194 msg (SE, _("Handle for %s not allowed here."),
195 referent_name (fh_get_referent (handle)));