Add abakus

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/abakus@1071969 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 122 insertions, 0 deletions

diff --git a/src/function.h b/src/function.h
new file mode 100644
index 0000000..3b56cbb
--- /dev/null
+++ b/src/function.h
@@ -0,0 +1,122 @@
+#ifndef ABAKUS_FUNCTION_H
+#define ABAKUS_FUNCTION_H
+/*
+ * function.h - part of abakus
+ * Copyright (C) 2004, 2005 Michael Pyne <[email protected]>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02110-1301  USA
+ */
+
+#include "numerictypes.h"
+
+#include <qobject.h>
+#include <qstringlist.h>
+#include <qstring.h>
+#include <qmap.h>
+#include <qdict.h>
+
+
+
+class BaseFunction;
+
+struct UserFunction
+{
+    int sequenceNumber;
+    BaseFunction *fn;
+    QString varName;
+};
+
+// Ugly pointer-to-member typedef ahead
+typedef Abakus::number_t (Abakus::number_t::*function_t)() const;
+
+struct Function {
+    QString name;
+    QString description;
+
+    // A function is either builtin or user defined, this union is
+    // used for both cases.
+    union {
+	function_t fn;       // Builtin.
+	UserFunction *userFn; // User defined
+    };
+
+    bool returnsTrig;
+    bool needsTrig;
+
+    bool userDefined;
+};
+
+void setTrigMode(Abakus::TrigMode mode);
+Abakus::TrigMode trigMode();
+
+class FunctionManager : public QObject
+{
+    Q_OBJECT
+    public:
+    typedef QDict<Function> functionDict;
+
+    static FunctionManager *instance();
+
+    Function *function(const QString &name);
+
+    bool isFunction(const QString &name);
+    bool isFunctionUserDefined(const QString &name);
+
+    bool addFunction(BaseFunction *fn, const QString &dependantVar);
+    bool addFunction(const QString &name, function_t fn, const QString &desc);
+    void removeFunction(const QString &name);
+
+    typedef enum { Builtin, UserDefined, All } FunctionType;
+
+    QStringList functionList(FunctionType type);
+
+    signals:
+    void signalFunctionAdded(const QString &name);
+    void signalFunctionRemoved(const QString &name);
+
+    private:
+    FunctionManager(QObject *parent = 0, const char *name = "function manager");
+
+    static FunctionManager *m_manager;
+    functionDict m_dict;
+};
+
+Abakus::number_t evaluateFunction(const Function *func, const Abakus::number_t value);
+
+// Implemented in lexer.l due to prototype issues.
+Abakus::number_t parseString(const char *str);
+
+// Implemented in lexer.l due to prototype issues.
+class Lexer
+{
+public:
+    Lexer(const QString &expr);
+    ~Lexer();
+
+    bool hasNext() const;
+    int nextType();
+
+    int tokenPos() const;
+
+    // Can call this after nextType to find the associated string value of the
+    // token.
+    QString tokenValue() const;
+
+private:
+    class Private;
+    Private *m_private;
+};
+
+#endif