Added new files resulting from directory restructuring.

[pspp] / src / language / expressions / public.h

diff --git a/src/language/expressions/public.h b/src/language/expressions/public.h
new file mode 100644 (file)
index 0000000..9a90cef
--- /dev/null
+++ b/src/language/expressions/public.h
@@ -0,0 +1,49 @@
+/* PSPP - computes sample statistics.
+   Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
+   Written by Ben Pfaff <blp@gnu.org>.
+
+   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 2 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, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA. */
+
+#if !expr_h
+#define expr_h 1
+
+#include <stddef.h>
+
+/* Expression parsing flags. */
+enum expr_type
+  {
+    EXPR_NUMBER = 0xf000,       /* Number. */
+    EXPR_STRING,                /* String. */
+    EXPR_BOOLEAN,               /* Boolean (number limited to 0, 1, SYSMIS). */
+  };
+
+struct dictionary;
+struct expression;
+struct ccase;
+struct pool;
+union value;
+
+struct expression *expr_parse (struct dictionary *, enum expr_type);
+struct expression *expr_parse_pool (struct pool *,
+                                    struct dictionary *, enum expr_type);
+void expr_free (struct expression *);
+
+double expr_evaluate_num (struct expression *, const struct ccase *,
+                          int case_idx);
+void expr_evaluate_str (struct expression *, const struct ccase *,
+                        int case_idx, char *dst, size_t dst_size);
+
+#endif /* expr.h */