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/******************************************************************************
* Copyright (C) 2011-2013 Michael Hofmann <mh21@mh21.de> *
* *
* 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, write to the Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
******************************************************************************/
public abstract class Function : GLib.Object {
public string id { get; construct; }
public string[] parameterdescs { get; construct; }
public Function(string id, string[] parameterdescs) {
Object(id: id, parameterdescs: parameterdescs);
}
protected static Error error(string message) {
return new Error(Quark.from_string("function-error-quark"), 0, "%s", message);
}
public abstract string call(string[] parameters) throws Error;
}
public class DecimalsFunction : Function {
public DecimalsFunction() {
base("decimals", {"value", "decimals"});
}
public override string call(string[] parameters) throws Error {
if (parameters.length != 2)
throw error("two parameters expected");
return "%.*f".printf(int.parse(parameters[1]), double.parse(parameters[0]));
}
}
public class SizeFunction : Function {
public SizeFunction() {
base("size", {"value"});
}
public override string call(string[] parameters) throws Error {
if (parameters.length != 1)
throw error("one parameter expected");
return Utils.format_size(double.parse(parameters[0]));
}
}
public class Size2Function : Function {
public Size2Function() {
base("size2", {"value"});
}
public override string call(string[] parameters) throws Error {
if (parameters.length != 1)
throw error("one parameter expected");
return GLib.format_size(uint64.parse(parameters[0]), FormatSizeFlags.IEC_UNITS);
}
}
public class SpeedFunction : Function {
public SpeedFunction() {
base("speed", {"value"});
}
public override string call(string[] parameters) throws Error {
if (parameters.length != 1)
throw error("one parameter expected");
return Utils.format_speed(double.parse(parameters[0]));
}
}
public class BitrateFunction : Function {
public BitrateFunction() {
base("bitrate", {"value"});
}
public override string call(string[] parameters) throws Error {
if (parameters.length != 1)
throw error("one parameter expected");
return Utils.format_bitrate(8 * double.parse(parameters[0]));
}
}
public class FrequencyFunction : Function {
public FrequencyFunction() {
base("frequency", {"value"});
}
public override string call(string[] parameters) throws Error {
if (parameters.length != 1)
throw error("one parameter expected");
return Utils.format_frequency(double.parse(parameters[0]));
}
}
public class PercentFunction : Function {
public PercentFunction() {
base("percent", {"value"});
}
public override string call(string[] parameters) throws Error {
if (parameters.length != 1)
throw error("one parameter expected");
return _("%u%%").printf
((uint) Math.round(100 * double.parse(parameters[0])));
}
}
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