private int MakeString(IntPtr src, UIntPtr byteCount, ref IntPtr newZString, ZStringFormat format)
{
if (src != IntPtr.Zero)
{
ulong stringLength = byteCount.ToUInt64();
if (stringLength == 0)
{
newZString = Empty;
}
else
{
// The framework cannot create a string longer than Int32.MaxValue.
if (stringLength > int.MaxValue)
{
return(PSError.kASOutOfMemory);
}
try
{
ZString zstring = new ZString(src, (int)stringLength, format);
newZString = GenerateDictionaryKey();
strings.Add(newZString, zstring);
}
catch (OutOfMemoryException)
{
return(PSError.kASOutOfMemory);
}
}
return(PSError.kASNoError);
}
return(PSError.kASBadParameter);
}
/// <summary>
/// Initializes a new instance of the <see cref="ZString"/> class.
/// </summary>
/// <param name="ptr">The pointer to the native string.</param>
/// <param name="length">The length of the native string.</param>
/// <param name="format">The format of the native string.</param>
/// <exception cref="ArgumentNullException"><paramref name="ptr"/> is null.</exception>
/// <exception cref="InvalidEnumArgumentException"><paramref name="format"/> does not specify a valid <see cref="ZStringFormat"/> value.</exception>
/// <exception cref="OutOfMemoryException">Insufficient memory to create the ZString.</exception>
public ZString(IntPtr ptr, int length, ZStringFormat format)
{
if (ptr == IntPtr.Zero)
{
throw new ArgumentNullException(nameof(ptr));
}
refCount = 1;
switch (format)
{
case ZStringFormat.Ansi:
data = Marshal.PtrToStringAnsi(ptr, length).TrimEnd('\0');
break;
case ZStringFormat.Unicode:
data = Marshal.PtrToStringUni(ptr, length).TrimEnd('\0');
break;
case ZStringFormat.Pascal:
data = PtrToStringPascal(ptr, length);
break;
default:
throw new InvalidEnumArgumentException(nameof(format), (int)format, typeof(ZStringFormat));
}
}
