Add MCONVERT file

diff --git a/src/language/data-io/mconvert.c b/src/language/data-io/mconvert.c
new file mode 100644 (file)
index 0000000..4498041
--- /dev/null
+++ b/src/language/data-io/mconvert.c
@@ -0,0 +1,86 @@
+/* PSPP - a program for statistical analysis.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#include "data/dataset.h"
+#include "language/data-io/file-handle.h"
+#include "language/lexer/lexer.h"
+#include "language/command.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+int
+cmd_mconvert (struct lexer *lexer, struct dataset *ds)
+{
+  bool append = false;
+  struct file_handle *in = NULL;
+  struct file_handle *out = NULL;
+  while (lex_token (lexer) != T_ENDCMD)
+    {
+      if (lex_match_id (lexer, "APPEND"))
+        append = true;
+      else if (lex_match_id (lexer, "REPLACE"))
+        append = false;
+      else
+        {
+          if (lex_match_id (lexer, "MATRIX"))
+            lex_match (lexer, T_EQUALS);
+
+          struct file_handle **fhp = (lex_match_id (lexer, "IN") ? &in
+                                      : lex_match_id (lexer, "OUT") ? &out
+                                      : NULL);
+          if (!fhp)
+            {
+              lex_error_expecting (lexer, "IN", "OUT", "APPEND", "REPLACE");
+              goto error;
+            }
+          if (!lex_force_match (lexer, T_LPAREN))
+            goto error;
+
+          fh_unref (*fhp);
+          if (lex_match (lexer, T_ASTERISK))
+            *fhp = NULL;
+          else
+            {
+              *fhp = fh_parse (lexer, FH_REF_FILE, dataset_session (ds));
+              if (!*fhp)
+                goto error;
+            }
+
+          if (!lex_force_match (lexer, T_RPAREN))
+            goto error;
+        }
+
+      lex_match (lexer, T_SLASH);
+    }
+
+  if (!in && !dataset_has_source (ds))
+    {
+      msg (SE, _("No active file is defined and no external file is "
+                 "specified on MATRIX=IN."));
+      goto error;
+    }
+
+  /* XXX */
+
+error:
+  fh_unref (in);
+  fh_unref (out);
+  return CMD_FAILURE;
+}
+