forked from AuroraMiddleware/gtk
e3c4fb67ca
Checking if a set is empty or a singleton can be done more efficiently than determining its size.
280 lines
9.3 KiB
C
280 lines
9.3 KiB
C
/* gtkconstraintequationprivate.h: Constraint expressions and variables
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* Copyright 2019 GNOME Foundation
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Emmanuele Bassi
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*/
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#pragma once
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#include "gtkconstrainttypesprivate.h"
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G_BEGIN_DECLS
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GtkConstraintVariable *
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gtk_constraint_variable_new (const char *prefix,
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const char *name);
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GtkConstraintVariable *
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gtk_constraint_variable_new_dummy (const char *name);
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GtkConstraintVariable *
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gtk_constraint_variable_new_objective (const char *name);
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GtkConstraintVariable *
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gtk_constraint_variable_new_slack (const char *name);
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GtkConstraintVariable *
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gtk_constraint_variable_ref (GtkConstraintVariable *variable);
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void
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gtk_constraint_variable_unref (GtkConstraintVariable *variable);
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void
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gtk_constraint_variable_set_value (GtkConstraintVariable *variable,
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double value);
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double
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gtk_constraint_variable_get_value (const GtkConstraintVariable *variable);
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char *
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gtk_constraint_variable_to_string (const GtkConstraintVariable *variable);
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gboolean
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gtk_constraint_variable_is_external (const GtkConstraintVariable *variable);
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gboolean
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gtk_constraint_variable_is_pivotable (const GtkConstraintVariable *variable);
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gboolean
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gtk_constraint_variable_is_restricted (const GtkConstraintVariable *variable);
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gboolean
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gtk_constraint_variable_is_dummy (const GtkConstraintVariable *variable);
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typedef struct {
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GtkConstraintVariable *first;
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GtkConstraintVariable *second;
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} GtkConstraintVariablePair;
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GtkConstraintVariablePair *
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gtk_constraint_variable_pair_new (GtkConstraintVariable *first,
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GtkConstraintVariable *second);
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void
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gtk_constraint_variable_pair_free (GtkConstraintVariablePair *pair);
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typedef struct _GtkConstraintVariableSet GtkConstraintVariableSet;
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GtkConstraintVariableSet *
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gtk_constraint_variable_set_new (void);
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void
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gtk_constraint_variable_set_free (GtkConstraintVariableSet *set);
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gboolean
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gtk_constraint_variable_set_add (GtkConstraintVariableSet *set,
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GtkConstraintVariable *variable);
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gboolean
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gtk_constraint_variable_set_remove (GtkConstraintVariableSet *set,
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GtkConstraintVariable *variable);
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gboolean
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gtk_constraint_variable_set_is_empty (GtkConstraintVariableSet *set);
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gboolean
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gtk_constraint_variable_set_is_singleton (GtkConstraintVariableSet *set);
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int
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gtk_constraint_variable_set_size (GtkConstraintVariableSet *set);
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typedef struct {
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/*< private >*/
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gpointer dummy1;
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gpointer dummy2;
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gint64 dummy3;
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} GtkConstraintVariableSetIter;
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void
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gtk_constraint_variable_set_iter_init (GtkConstraintVariableSetIter *iter,
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GtkConstraintVariableSet *set);
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gboolean
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gtk_constraint_variable_set_iter_next (GtkConstraintVariableSetIter *iter,
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GtkConstraintVariable **variable_p);
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GtkConstraintExpression *
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gtk_constraint_expression_new (double constant);
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GtkConstraintExpression *
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gtk_constraint_expression_new_from_variable (GtkConstraintVariable *variable);
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GtkConstraintExpression *
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gtk_constraint_expression_ref (GtkConstraintExpression *expression);
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void
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gtk_constraint_expression_unref (GtkConstraintExpression *expression);
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GtkConstraintExpression *
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gtk_constraint_expression_clone (GtkConstraintExpression *expression);
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void
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gtk_constraint_expression_set_constant (GtkConstraintExpression *expression,
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double constant);
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double
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gtk_constraint_expression_get_constant (const GtkConstraintExpression *expression);
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gboolean
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gtk_constraint_expression_is_constant (const GtkConstraintExpression *expression);
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void
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gtk_constraint_expression_add_expression (GtkConstraintExpression *a_expr,
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GtkConstraintExpression *b_expr,
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double n,
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GtkConstraintVariable *subject,
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GtkConstraintSolver *solver);
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void
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gtk_constraint_expression_add_variable (GtkConstraintExpression *expression,
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GtkConstraintVariable *variable,
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double coefficient,
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GtkConstraintVariable *subject,
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GtkConstraintSolver *solver);
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void
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gtk_constraint_expression_remove_variable (GtkConstraintExpression *expression,
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GtkConstraintVariable *variable);
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void
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gtk_constraint_expression_set_variable (GtkConstraintExpression *expression,
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GtkConstraintVariable *variable,
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double coefficient);
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double
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gtk_constraint_expression_get_coefficient (GtkConstraintExpression *expression,
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GtkConstraintVariable *variable);
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char *
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gtk_constraint_expression_to_string (const GtkConstraintExpression *expression);
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double
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gtk_constraint_expression_new_subject (GtkConstraintExpression *expression,
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GtkConstraintVariable *subject);
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void
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gtk_constraint_expression_change_subject (GtkConstraintExpression *expression,
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GtkConstraintVariable *old_subject,
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GtkConstraintVariable *new_subject);
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void
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gtk_constraint_expression_substitute_out (GtkConstraintExpression *expression,
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GtkConstraintVariable *out_var,
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GtkConstraintExpression *expr,
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GtkConstraintVariable *subject,
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GtkConstraintSolver *solver);
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GtkConstraintVariable *
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gtk_constraint_expression_get_pivotable_variable (GtkConstraintExpression *expression);
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GtkConstraintExpression *
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gtk_constraint_expression_plus_constant (GtkConstraintExpression *expression,
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double constant);
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GtkConstraintExpression *
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gtk_constraint_expression_minus_constant (GtkConstraintExpression *expression,
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double constant);
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GtkConstraintExpression *
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gtk_constraint_expression_plus_variable (GtkConstraintExpression *expression,
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GtkConstraintVariable *variable);
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GtkConstraintExpression *
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gtk_constraint_expression_minus_variable (GtkConstraintExpression *expression,
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GtkConstraintVariable *variable);
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GtkConstraintExpression *
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gtk_constraint_expression_multiply_by (GtkConstraintExpression *expression,
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double factor);
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GtkConstraintExpression *
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gtk_constraint_expression_divide_by (GtkConstraintExpression *expression,
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double factor);
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struct _GtkConstraintExpressionBuilder
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{
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/*< private >*/
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gpointer dummy1;
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gpointer dummy2;
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int dummy3;
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};
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void
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gtk_constraint_expression_builder_init (GtkConstraintExpressionBuilder *builder,
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GtkConstraintSolver *solver);
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void
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gtk_constraint_expression_builder_term (GtkConstraintExpressionBuilder *builder,
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GtkConstraintVariable *term);
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void
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gtk_constraint_expression_builder_plus (GtkConstraintExpressionBuilder *builder);
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void
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gtk_constraint_expression_builder_minus (GtkConstraintExpressionBuilder *builder);
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void
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gtk_constraint_expression_builder_divide_by (GtkConstraintExpressionBuilder *builder);
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void
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gtk_constraint_expression_builder_multiply_by (GtkConstraintExpressionBuilder *builder);
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void
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gtk_constraint_expression_builder_constant (GtkConstraintExpressionBuilder *builder,
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double value);
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GtkConstraintExpression *
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gtk_constraint_expression_builder_finish (GtkConstraintExpressionBuilder *builder) G_GNUC_WARN_UNUSED_RESULT;
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/*< private >
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* GtkConstraintExpressionIter:
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*
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* An iterator object for terms inside a #GtkConstraintExpression.
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*/
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typedef struct {
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/*< private >*/
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gpointer dummy1;
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gpointer dummy2;
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gint64 dummy3;
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} GtkConstraintExpressionIter;
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void
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gtk_constraint_expression_iter_init (GtkConstraintExpressionIter *iter,
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GtkConstraintExpression *equation);
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gboolean
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gtk_constraint_expression_iter_next (GtkConstraintExpressionIter *iter,
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GtkConstraintVariable **variable,
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double *coefficient);
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gboolean
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gtk_constraint_expression_iter_prev (GtkConstraintExpressionIter *iter,
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GtkConstraintVariable **variable,
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double *coefficient);
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G_END_DECLS
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