using System;
using System.CodeDom.Compiler;
using System.Globalization;
using System.Reflection;
using System.Threading;
namespace RobvanderWoude
{
class ClCalc
{
static int Main( string[] args )
{
string expression = string.Empty;
foreach ( string arg in args )
{
expression += " " + arg;
}
expression = expression.Trim( );
try
{
Thread
.CurrentThread.CurrentCulture = new CultureInfo
( "en-US" ); Double result = JScriptEvaluator.EvalToDouble( expression );
Console.WriteLine( "{0} = {1}", expression, result );
try
{
return Convert.ToInt32( result );
}
catch ( Exception )
{
return 0;
}
}
catch ( Exception e )
{
return WriteError( e.Message );
}
}
public static int WriteError( Exception e )
{
return WriteError( e == null ? null : e.Message );
}
public static int WriteError( string errorMessage )
{
/*
ClCalc, Version 1.00
Command Line Calculator
Usage: CLCALC expression
Notes: Result is displayed on screen and returned as exit code ("errorlevel").
Exit code is integer value of result or 0 in case of error or overflow.
"Culture" is set to "en-US", so use and expect decimal dots, no commas.
Based on Eval function (using JScript) by "markman":
www.codeproject.com/Articles/11939/Evaluate-C-Code-Eval-Function
Written by Rob van der Woude
http://www.robvanderwoude.com
*/
if ( string.IsNullOrEmpty( errorMessage ) == false )
{
Console.Error.WriteLine( );
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.Write( "ERROR: " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.WriteLine( errorMessage );
Console.ResetColor( );
}
Console.Error.WriteLine( );
Console.Error.WriteLine( "ClCalc, Version 1.00" );
Console.Error.WriteLine( "Command Line Calculator" );
Console.Error.WriteLine( );
Console.Error.Write( "Usage: " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.WriteLine( "CLCALC expression" );
Console.ResetColor( );
Console.Error.WriteLine( );
Console.Error.WriteLine( "Notes: Result is displayed on screen and returned as exit code (\"errorlevel\")." );
Console.Error.WriteLine( " Exit code is integer value of result or 0 in case of error or overflow." );
Console.Error.WriteLine( " Culture is set to \"en-US\", so use and expect decimal dots, not commas." );
Console.Error.WriteLine( " Based on Eval function (using JScript) by \"markman\":" );
Console.ForegroundColor = ConsoleColor.DarkGray;
Console.Error.WriteLine( " www.codeproject.com/Articles/11939/Evaluate-C-Code-Eval-Function" );
Console.ResetColor( );
Console.Error.WriteLine( );
Console.Error.WriteLine( "Written by Rob van der Woude" );
Console.Error.WriteLine( "http://www.robvanderwoude.com" );
return 0;
}
}
// Eval function using JScript, by "markman"
// http://www.codeproject.com/Articles/11939/Evaluate-C-Code-Eval-Function
public class JScriptEvaluator
{
public static int EvalToInteger( string statement )
{
string s = EvalToString( statement );
return int.Parse( s.ToString( ) );
}
public static double EvalToDouble( string statement )
{
string s = EvalToString( statement );
return double.Parse( s );
}
public static string EvalToString( string statement )
{
object o = EvalToObject( statement );
return o.ToString( );
}
public static object EvalToObject( string statement )
{
return _evaluatorType.InvokeMember(
"Eval",
BindingFlags.InvokeMethod,
null,
_evaluator,
new object[] { statement
} );
}
static JScriptEvaluator( )
{
CodeDomProvider provider
= new Microsoft
.JScript.JScriptCodeProvider( );
CompilerParameters parameters;
parameters
= new CompilerParameters
( ); parameters.GenerateInMemory = true;
CompilerResults results;
results = provider.CompileAssemblyFromSource( parameters, _jscriptSource );
Assembly assembly = results.CompiledAssembly;
_evaluatorType = assembly.GetType( "Evaluator.Evaluator" );
_evaluator = Activator.CreateInstance( _evaluatorType );
}
private static object _evaluator = null;
private static Type _evaluatorType = null;
private static readonly string _jscriptSource =
@"package Evaluator
{
class Evaluator
{
public function Eval(expr : String) : String
{
return eval(expr);
}
}
}";
}
}
//csharp/7330