/// <summary>
/// Writes a string atom.
/// </summary>
/// <param name="s">The string to write.</param>
private void Write(NullTerminatedString s)
{
Write(s as Atom, 0x01);
var bytes = Encoding.UTF8.GetBytes(s.Content);
writer.Write(bytes, 0, bytes.Length);
writer.Write((byte)0x00);
}
/// <summary>
/// Links a null terminated string.
/// </summary>
/// <param name="s">The string to link.</param>
private void Link(NullTerminatedString s)
{
addresses.Add(s, address);
var bytes = Encoding.UTF8.GetBytes(s.Content);
stream.Write(bytes, 0, bytes.Length);
stream.WriteByte(0x00);
address += s.Size + 1;
}
/// <summary>
/// Creates a copy of the given string.
/// </summary>
/// <param name="s">The atom to copy.</param>
/// <returns>The copy of the <paramref name="s"/>.</returns>
private static Atom Copy(NullTerminatedString s)
{
var copy = new NullTerminatedString();
copy.IsDefined = s.IsDefined;
copy.IsGlobal = s.IsGlobal;
copy.Name = s.Name;
copy.Content = s.Content;
return(copy);
}
public void Write_NullTerminatedString_StringWritten()
{
byte[] bytes =
{
0x61, 0x74, 0x6F, 0x6D, // Magic number.
0x01, 0x00, // Version 1.
0x01, // The origin is set.
0x20, 0x00, 0x00, 0x00, // The origin is set to 0x20.
0x00, 0x00, 0x00, 0x00,
// Base part of the atom.
0x01, // String type.
0x01, // The string is defined.
0x01, // The string is global.
0x54, 0x78, 0x74, 0x00, // The string is called 'Txt'.
// String part of the atom.
0x41, 0x62, 0x63, 0x00 // The string is 'Abc'.
};
var s = new NullTerminatedString()
{
IsDefined = true,
IsGlobal = true,
Name = "Txt",
Content = "Abc"
};
using (var stream = new MemoryStream())
{
var writer = new AtomWriter();
var file = new ObjectFile();
file.IsOriginSet = true;
file.Origin = 0x20;
file.Atoms.Add(s);
writer.Write(file, stream);
CollectionAssert.AreEqual(bytes, stream.ToArray());
}
}
/// <summary>
/// Reads a null terminated string from the object file.
/// </summary>
/// <returns>The read string.</returns>
/// <exception cref="InvalidObjectFileException">
/// Unexpected end of object file.
/// </exception>
private NullTerminatedString NullTerminatedString()
{
var s = new NullTerminatedString();
Atom(s);
if (EndOfFile)
{
throw new InvalidObjectFileException("Unexpected end of object file. Expected null terminated string.");
}
var bytes = new List <byte>();
while (!EndOfFile)
{
var b = reader.ReadByte();
switch (b)
{
case 0:
break;
default:
bytes.Add(b);
break;
}
if (b == 0)
{
break;
}
}
s.Content = Encoding.UTF8.GetString(bytes.ToArray());
return(s);
}
public void Write_ProcedureWithReference_ProcedureRead()
{
byte[] bytes =
{
0x61, 0x74, 0x6F, 0x6D, // Magic number.
0x01, 0x00, // Version 1.
0x01, // The origin is set.
0x20, 0x00, 0x00, 0x00, // The origin is set to 0x20.
0x00, 0x00, 0x00, 0x00,
// Base part of the atom.
0x00, // Procedure type.
0x01, // The procedure is defined.
0x01, // The procedure is global.
0x50, 0x72, 0x6F, 0x63, 0x00, // The procedure is called 'Proc'.
// Procedure part of the atom.
0x01, // This is the main procedure.
0x04, 0x00, 0x00, 0x00, // The size of the code is 4 bytes.
0x00, 0x00, 0x00, 0x00, // The procedure code.
0x01, 0x00, // Number of references.
// Reference.
0x01, 0x00, 0x00, 0x00, // It is atom number 1 that is being referenced (index based).
0x01, // The address is in little endian.
0x04, // The size of the address is 4 bytes.
0x00, 0x00, 0x00, 0x00, // The address to relocate.
// Null terminated string.
0x01, // Null terminated string type.
0x01, // The string is defined.
0x00, // The string is not global.
0x53, 0x00, // The string is called 'S'.
// String part
0x54, 0x78, 0x74, 0x00 // The string is 'Txt'.
};
var s = new NullTerminatedString()
{
IsDefined = true,
IsGlobal = false,
Name = "S",
Content = "Txt"
};
var procedure = new Procedure()
{
IsDefined = true,
IsGlobal = true,
Name = "Proc",
IsMain = true
};
procedure.Code.Add(0x00);
procedure.Code.Add(0x00);
procedure.Code.Add(0x00);
procedure.Code.Add(0x00);
procedure.References.Add(new Reference(s)
{
IsAddressInLittleEndian = true,
SizeOfAddress = 4,
Address = 0x00
});
using (var stream = new MemoryStream())
{
var writer = new AtomWriter();
var file = new ObjectFile();
file.IsOriginSet = true;
file.Origin = 0x20;
file.Atoms.Add(procedure);
file.Atoms.Add(s);
writer.Write(file, stream);
CollectionAssert.AreEqual(bytes, stream.ToArray());
}
}
