This replaces the existing IMount openFor* method with openChannelFor*
ones, which return an appropriate byte channel instead.
As channels are not correctly closed when GCed, we introduce a
FileSystemWrapper. We store a weak reference to this, and when it is
GCed or the file closed, we will remove it from our "open file" set and
ensure any underlying buffers are closed.
While this change may seem a little odd, it does introduce some
benefits:
- We can replace JarMount with a more general FileSystemMount. This
does assume a read-only file system, but could technically be used
for other sources.
- Add support for seekable (binary) handles. We can now look for
instances of SeekableByteChannel and dynamically add it. This works
for all binary filesystem and HTTP streams.
- Rewrite the io library to more accurately emulate PUC Lua's
implementation. We do not correctly implement some elements (most
noticably "*n", but it's a definite improvement.
ILuaAPI has been moved to dan200.computercraft.api.lua. One creates
a new API by registering an instance of ILuaAPIFactory. This takes an
instance of IComputerSystem and returns such an API.
IComputerSystem is an extension of IComputerAccess, with methods to
access additional information about the the computer, such as its label
and filesystem.
This uses a new utility class ArgumentHelper, which provides convenience
methods for parsing arguments from an array of Objects.
The format of error messages has also changed. It now follows a format
similar to Lua's native error messages - including the invalid argument
index, the expected type and the type actually received.
- Move the encoding/decoding from the Filesystem implementation to the
individual handles.
- Move each handle into an core.apis.handles package from the main fs
API.
- Move the HTTP response to inherit from these handles.
- Allow binary handles' read function to accept a number, specifying
how many characters to read - these will be returned as a Lua string.
- Add readAll to binary handles
- Allow binary handles' write function to accept a string which is
decoded into the individual bytes.
- Add "binary" argument to http.request and friends in order to return
a binary handle.
- Ensure file handles are open when reading from/writing to them.
- Return the error message when opening a file fails.