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/magic.h>
29 #include <libpspp/str.h>
30 #include <data/variable.h>
31 #include <data/file-handle-def.h>
34 #define _(msgid) gettext (msgid)
43 tabwidth=integer "x>=0" "%s must be nonnegative";
44 mode=mode:!character/image/scratch.
50 cmd_file_handle (struct lexer *lexer, struct dataset *ds)
52 char handle_name[LONG_NAME_LEN + 1];
53 struct fh_properties properties = *fh_default_properties ();
55 struct cmd_file_handle cmd;
56 struct file_handle *handle;
58 if (!lex_force_id (lexer))
59 return CMD_CASCADING_FAILURE;
60 str_copy_trunc (handle_name, sizeof handle_name, lex_tokid (lexer));
62 handle = fh_from_id (handle_name);
65 msg (SE, _("File handle %s is already defined. "
66 "Use CLOSE FILE HANDLE before redefining a file handle."),
68 return CMD_CASCADING_FAILURE;
72 if (!lex_force_match (lexer, '/'))
73 return CMD_CASCADING_FAILURE;
75 if (!parse_file_handle (lexer, ds, &cmd, NULL))
76 return CMD_CASCADING_FAILURE;
78 if (lex_end_of_command (lexer) != CMD_SUCCESS)
81 if (cmd.s_name == NULL && cmd.mode != FH_SCRATCH)
83 lex_sbc_missing (lexer, "NAME");
90 properties.mode = FH_MODE_TEXT;
92 properties.tab_width = cmd.n_tabwidth[0];
95 properties.mode = FH_MODE_BINARY;
96 if (cmd.n_lrecl[0] == NOT_LONG)
97 msg (SE, _("Fixed-length records were specified on /RECFORM, but "
98 "record length was not specified on /LRECL. "
99 "Assuming %u-character records."),
100 (unsigned int) properties.record_width);
101 else if (cmd.n_lrecl[0] < 1)
102 msg (SE, _("Record length (%ld) must be at least one byte. "
103 "Assuming %u-character records."),
104 cmd.n_lrecl[0], (unsigned int) properties.record_width);
106 properties.record_width = cmd.n_lrecl[0];
112 if (cmd.mode != FH_SCRATCH)
113 fh_create_file (handle_name, cmd.s_name, &properties);
115 fh_create_scratch (handle_name);
117 free_file_handle (&cmd);
121 free_file_handle (&cmd);
122 return CMD_CASCADING_FAILURE;
126 cmd_close_file_handle (struct lexer *lexer, struct dataset *ds UNUSED)
128 struct file_handle *handle;
130 if (!lex_force_id (lexer))
131 return CMD_CASCADING_FAILURE;
132 handle = fh_from_id (lex_tokid (lexer));
134 return CMD_CASCADING_FAILURE;
141 /* Returns the name for REFERENT. */
143 referent_name (enum fh_referent referent)
150 return _("inline file");
152 return _("scratch file");
158 /* Parses a file handle name, which may be a file name as a string
159 or a file handle name as an identifier. The allowed types of
160 file handle are restricted to those in REFERENT_MASK. Returns
161 the file handle when successful, a null pointer on failure. */
163 fh_parse (struct lexer *lexer, enum fh_referent referent_mask)
165 struct file_handle *handle;
167 if (lex_match_id (lexer, "INLINE"))
168 handle = fh_inline_file ();
171 if (lex_token (lexer) != T_ID && lex_token (lexer) != T_STRING)
173 lex_error (lexer, _("expecting a file name or handle name"));
178 if (lex_token (lexer) == T_ID)
179 handle = fh_from_id (lex_tokid (lexer));
181 handle = fh_from_file_name (ds_cstr (lex_tokstr (lexer)));
184 if (lex_token (lexer) != T_ID || lex_tokid (lexer)[0] != '#' || get_syntax () != ENHANCED)
185 handle = fh_create_file (NULL, ds_cstr (lex_tokstr (lexer)),
186 fh_default_properties ());
188 handle = fh_create_scratch (lex_tokid (lexer));
193 if (!(fh_get_referent (handle) & referent_mask))
195 msg (SE, _("Handle for %s not allowed here."),
196 referent_name (fh_get_referent (handle)));