-/* PSPP - computes sample statistics.
- Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
- Written by Ben Pfaff <blp@gnu.org>.
+/* PSPP - a program for statistical analysis.
+ Copyright (C) 1997-9, 2000, 2011 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 2 of the
- License, or (at your option) any later version.
+ 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.
+ 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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#ifndef EXPRESSIONS_PRIVATE_H
+#ifndef EXPRESSIONS_PRIVATE_H
#define EXPRESSIONS_PRIVATE_H
#include <assert.h>
#include <stddef.h>
-#include "format.h"
-#include "str.h"
-#include "public.h"
-#include "operations.h"
+#include "data/format.h"
+#include "language/expressions/operations.h"
+#include "language/expressions/public.h"
+#include "libpspp/str.h"
-enum operation_flags
+enum operation_flags
{
/* Most operations produce a missing output value if any
input value is missing. Setting this bit indicates that
to be non-missing. The operation must have an array
operand and the array must contain `double's. Both
OPF_ABSORB_MISS and OPF_ARRAY_OPERAND must also be set. */
- OPF_MIN_VALID = 002,
+ OPF_MIN_VALID = 002,
/* If set, operation is non-optimizable in general. Unless
combined with OPF_ABSORB_MISS, missing input values are
OPF_UNIMPLEMENTED = 020,
/* If set, this operation is a PSPP extension. */
- OPF_EXTENSION = 040
+ OPF_EXTENSION = 040,
+
+ /* If set, this operation may not occur after TEMPORARY.
+ (Currently this applies only to LAG.) */
+ OPF_PERM_ONLY = 0100,
+
+ /* If set, this operation's name may not be abbreviated. */
+ OPF_NO_ABBREV = 0200
};
#define EXPR_ARG_MAX 4
int array_granularity;
};
-extern struct operation operations[];
+extern const struct operation operations[];
-/* Tree structured expressions. */
+/* Tree structured expressions. */
/* Atoms. */
-struct number_node
+struct number_node
{
operation_type type; /* OP_number. */
double n;
struct string_node
{
operation_type type; /* OP_string. */
- struct fixed_string s;
+ struct substring s;
};
struct variable_node
{
operation_type type; /* OP_variable. */
- struct variable *v;
+ const struct variable *v;
};
struct integer_node
struct composite_node composite;
};
-union operation_data
+union operation_data
{
operation_type operation;
double number;
- struct fixed_string string;
- struct variable *variable;
+ struct substring string;
+ const struct variable *variable;
const struct vector *vector;
struct fmt_spec *format;
int integer;
struct expression
{
struct pool *expr_pool; /* Pool for expression static data. */
- struct dictionary *dict; /* Dictionary for variables, vectors. */
+ struct dataset *ds ; /* The dataset */
atom_type type; /* Type of expression result. */
union operation_data *ops; /* Expression data. */
size_t op_cnt, op_cap; /* Number of ops, amount of allocated space. */
double *number_stack; /* Evaluation stack: numerics, Booleans. */
- struct fixed_string *string_stack; /* Evaluation stack: strings. */
+ struct substring *string_stack; /* Evaluation stack: strings. */
struct pool *eval_pool; /* Pool for evaluation temporaries. */
};
-struct expression *expr_parse_any (struct dictionary *, bool optimize);
+struct expression *expr_parse_any (struct lexer *lexer, struct dataset *, bool optimize);
void expr_debug_print_postfix (const struct expression *);
union any_node *expr_optimize (union any_node *, struct expression *);
union any_node *expr_allocate_string_buffer (struct expression *e,
const char *string, size_t length);
union any_node *expr_allocate_string (struct expression *e,
- struct fixed_string);
+ struct substring);
union any_node *expr_allocate_variable (struct expression *e,
- struct variable *);
+ const struct variable *);
union any_node *expr_allocate_format (struct expression *e,
const struct fmt_spec *);
union any_node *expr_allocate_vector (struct expression *e,
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