public static string fftw_export_wisdom_to_string()
{
// We cannot use the fftw_export_wisdom_to_string function here
// because we have no way of releasing the returned memory.
StringBuilder sb = new StringBuilder();
FftwInterop.WriteCharHandler writeChar = (c, ptr) => sb.Append((char)c);
FftwInterop.fftw_export_wisdom(writeChar, IntPtr.Zero);
return(sb.ToString());
}
static string GetVersion()
{
const string VersionPrefix = "fftw-";
const byte WhiteSpace = (byte)' ';
byte[] prefix = Encoding.ASCII.GetBytes(VersionPrefix);
int i = 0;
StringBuilder sb = new StringBuilder();
FftwInterop.WriteCharHandler writeChar = (c, ptr) =>
{
if (i < 0)
{
return;
}
if (i == VersionPrefix.Length)
{
if (c == WhiteSpace)
{
i = -1;
}
else
{
sb.Append((char)c);
}
}
else if (c == prefix[i])
{
i++;
}
else
{
i = 0;
}
};
// This is only called on initialization, so no synchronization/lock is required
FftwInterop.fftw_export_wisdom(writeChar, IntPtr.Zero);
return(sb.ToString());
}
