1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2006, 2009, 2010, 2011, 2012 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/>. */
22 #include "data/dataset.h"
23 #include "data/value.h"
24 #include "language/command.h"
25 #include "language/data-io/data-writer.h"
26 #include "language/data-io/file-handle.h"
27 #include "language/expressions/public.h"
28 #include "language/lexer/lexer.h"
29 #include "libpspp/message.h"
30 #include "output/text-item.h"
32 #include "gl/xalloc.h"
35 #define _(msgid) gettext (msgid)
37 /* PRINT SPACE transformation. */
38 struct print_space_trns
40 struct dfm_writer *writer; /* Output data file. */
41 struct expression *expr; /* Number of lines; NULL means 1. */
44 static trns_proc_func print_space_trns_proc;
45 static trns_free_func print_space_trns_free;
48 cmd_print_space (struct lexer *lexer, struct dataset *ds)
50 struct print_space_trns *trns;
51 struct file_handle *handle = NULL;
52 struct expression *expr = NULL;
53 struct dfm_writer *writer;
54 char *encoding = NULL;
56 if (lex_match_id (lexer, "OUTFILE"))
58 lex_match (lexer, T_EQUALS);
60 handle = fh_parse (lexer, FH_REF_FILE, NULL);
64 if (lex_match_id (lexer, "ENCODING"))
66 lex_match (lexer, T_EQUALS);
67 if (!lex_force_string (lexer))
70 encoding = ss_xstrdup (lex_tokss (lexer));
78 if (lex_token (lexer) != T_ENDCMD)
80 expr = expr_parse (lexer, ds, EXPR_NUMBER);
81 if (lex_token (lexer) != T_ENDCMD)
83 lex_error (lexer, _("expecting end of command"));
92 writer = dfm_open_writer (handle, encoding);
99 trns = xmalloc (sizeof *trns);
100 trns->writer = writer;
103 add_transformation (ds,
104 print_space_trns_proc, print_space_trns_free, trns);
114 /* Executes a PRINT SPACE transformation. */
116 print_space_trns_proc (void *t_, struct ccase **c,
117 casenumber case_num UNUSED)
119 struct print_space_trns *trns = t_;
125 double f = expr_evaluate_num (trns->expr, *c, case_num);
127 msg (SW, _("The expression on %s evaluated to the "
128 "system-missing value."), "PRINT SPACE");
129 else if (f < 0 || f > INT_MAX)
130 msg (SW, _("The expression on %s evaluated to %g."), "PRINT SPACE", f);
136 if (trns->writer == NULL)
137 text_item_submit (text_item_create (TEXT_ITEM_BLANK_LINE, ""));
139 dfm_put_record (trns->writer, " ", 1); /* XXX */
141 if (trns->writer != NULL && dfm_write_error (trns->writer))
143 return TRNS_CONTINUE;
146 /* Frees a PRINT SPACE transformation.
147 Returns true if successful, false if an I/O error occurred. */
149 print_space_trns_free (void *trns_)
151 struct print_space_trns *trns = trns_;
152 bool ok = dfm_close_writer (trns->writer);
153 expr_free (trns->expr);