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 <data/file-name.h>
23 #include <language/command.h>
24 #include <language/lexer/lexer.h>
25 #include <libpspp/assertion.h>
26 #include <libpspp/message.h>
27 #include <libpspp/str.h>
28 #include <data/variable.h>
29 #include <data/file-handle-def.h>
34 #define _(msgid) gettext (msgid)
43 tabwidth=integer "x>=0" "%s must be nonnegative";
44 mode=mode:!character/binary/image/360/scratch;
45 recform=recform:fixed/f/variable/v/spanned/vs.
51 cmd_file_handle (struct lexer *lexer, struct dataset *ds)
53 char handle_name[LONG_NAME_LEN + 1];
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.mode != FH_SCRATCH)
82 struct fh_properties properties = *fh_default_properties ();
84 if (cmd.s_name == NULL)
86 lex_sbc_missing (lexer, "NAME");
93 properties.mode = FH_MODE_TEXT;
95 properties.tab_width = cmd.n_tabwidth[0];
98 properties.mode = FH_MODE_FIXED;
101 properties.mode = FH_MODE_VARIABLE;
104 properties.encoding = LEGACY_EBCDIC;
105 if (cmd.recform == FH_FIXED || cmd.recform == FH_F)
106 properties.mode = FH_MODE_FIXED;
107 else if (cmd.recform == FH_VARIABLE || cmd.recform == FH_V)
109 properties.mode = FH_MODE_360_VARIABLE;
110 properties.record_width = 8192;
112 else if (cmd.recform == FH_SPANNED || cmd.recform == FH_VS)
114 properties.mode = FH_MODE_360_SPANNED;
115 properties.record_width = 8192;
119 msg (SE, _("RECFORM must be specified with MODE=360."));
127 if (properties.mode == FH_MODE_FIXED || cmd.n_lrecl[0] != LONG_MIN)
129 if (cmd.n_lrecl[0] == LONG_MIN)
130 msg (SE, _("The specified file mode requires LRECL. "
131 "Assuming %d-character records."),
132 properties.record_width);
133 else if (cmd.n_lrecl[0] < 1 || cmd.n_lrecl[0] >= (1UL << 31))
134 msg (SE, _("Record length (%ld) must be between 1 and %lu bytes. "
135 "Assuming %d-character records."),
136 cmd.n_lrecl[0], (1UL << 31) - 1, properties.record_width);
138 properties.record_width = cmd.n_lrecl[0];
141 fh_create_file (handle_name, cmd.s_name, &properties);
144 fh_create_scratch (handle_name);
146 free_file_handle (&cmd);
150 free_file_handle (&cmd);
151 return CMD_CASCADING_FAILURE;
155 cmd_close_file_handle (struct lexer *lexer, struct dataset *ds UNUSED)
157 struct file_handle *handle;
159 if (!lex_force_id (lexer))
160 return CMD_CASCADING_FAILURE;
161 handle = fh_from_id (lex_tokid (lexer));
163 return CMD_CASCADING_FAILURE;
169 /* Returns the name for REFERENT. */
171 referent_name (enum fh_referent referent)
178 return _("inline file");
180 return _("scratch file");
186 /* Parses a file handle name, which may be a file name as a string
187 or a file handle name as an identifier. The allowed types of
188 file handle are restricted to those in REFERENT_MASK. Returns
189 the file handle when successful, a null pointer on failure.
191 The caller is responsible for fh_unref()'ing the returned
192 file handle when it is no longer needed. */
194 fh_parse (struct lexer *lexer, enum fh_referent referent_mask)
196 struct file_handle *handle;
198 if (lex_match_id (lexer, "INLINE"))
199 handle = fh_inline_file ();
202 if (lex_token (lexer) != T_ID && lex_token (lexer) != T_STRING)
204 lex_error (lexer, _("expecting a file name or handle name"));
209 if (lex_token (lexer) == T_ID)
210 handle = fh_from_id (lex_tokid (lexer));
213 if (lex_token (lexer) != T_ID || lex_tokid (lexer)[0] != '#' || get_syntax () != ENHANCED)
214 handle = fh_create_file (NULL, ds_cstr (lex_tokstr (lexer)),
215 fh_default_properties ());
217 handle = fh_create_scratch (lex_tokid (lexer));
222 if (!(fh_get_referent (handle) & referent_mask))
224 msg (SE, _("Handle for %s not allowed here."),
225 referent_name (fh_get_referent (handle)));