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using System.Collections.Generic;
using System.IO;
using System.Text;
namespace Mono.Options
{
public abstract class ArgumentSource
{
public abstract string Description { get; }
public abstract string[] GetNames();
public abstract bool GetArguments(string value, out IEnumerable<string> replacement);
public static IEnumerable<string> GetArgumentsFromFile(string file)
{
return GetArguments(File.OpenText(file), true);
}
public static IEnumerable<string> GetArguments(TextReader reader)
{
return GetArguments(reader, false);
}
// Cribbed from mcs/driver.cs:LoadArgs(string)
static IEnumerable<string> GetArguments(TextReader reader, bool close)
{
try
{
StringBuilder arg = new StringBuilder();
string line;
while ((line = reader.ReadLine()) != null)
{
int t = line.Length;
for (int i = 0; i < t; i++)
{
char c = line[i];
if (c == '"' || c == '\'')
{
char end = c;
for (i++; i < t; i++)
{
c = line[i];
if (c == end)
break;
arg.Append(c);
}
}
else if (c == ' ')
{
if (arg.Length > 0)
{
yield return arg.ToString();
arg.Length = 0;
}
}
else
arg.Append(c);
}
if (arg.Length > 0)
{
yield return arg.ToString();
arg.Length = 0;
}
}
}
finally
{
if (close)
reader.Close();
}
}
}
}
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