Improve errors returned by gotox.New()

Author: codedust

PROGRESS.md

@@ -1,6 +1,6 @@
 # List of implemented toxcore features
-`DONE` This means the function is already implemented.
-`WONT` This means the function will probably not be implemented.
+`DONE` means the function is already implemented.
+`WONT` means the function will probably not be implemented.
 
 Groupchats will probably not be added before the new groupchat API is ready.
 

bindings.go

@@ -85,7 +85,32 @@ func New(options *Options) (*Tox, error) {
 	cTox = C.tox_new(cOptions, &toxErrNew)
 	if cTox == nil || ToxErrNew(toxErrNew) != TOX_ERR_NEW_OK {
 		C.tox_options_free(cOptions)
-		return nil, ErrToxNew
+		switch ToxErrNew(toxErrNew) {
+		case TOX_ERR_NEW_NULL:
+			return nil, ErrArgs
+		case TOX_ERR_NEW_MALLOC:
+			return nil, ErrNewMalloc
+		case TOX_ERR_NEW_PORT_ALLOC:
+			return nil, ErrNewPortAlloc
+		case TOX_ERR_NEW_PROXY_BAD_TYPE:
+			return nil, ErrNewProxy
+		case TOX_ERR_NEW_PROXY_BAD_HOST:
+			return nil, ErrNewProxy
+		case TOX_ERR_NEW_PROXY_BAD_PORT:
+			return nil, ErrNewProxy
+		case TOX_ERR_NEW_PROXY_NOT_FOUND:
+			return nil, ErrNewProxy
+		case TOX_ERR_NEW_LOAD_ENCRYPTED:
+			return nil, ErrNewLoadEnc
+		case TOX_ERR_NEW_LOAD_BAD_FORMAT:
+			return nil, ErrNewLoadBadFormat
+		}
+
+		if cTox == nil {
+			return nil, ErrToxNew
+		}
+
+		return nil, ErrUnknown
 	}
 
 	t := &Tox{tox: cTox, cOptions: cOptions}

const.go

@@ -89,6 +89,14 @@ var (
 	ErrUnknown  = errors.New("An unknown error occoured")
 )
 
+var (
+	ErrNewMalloc        = errors.New("Memory allocation failed")
+	ErrNewPortAlloc     = errors.New("Could not bind to port")
+	ErrNewProxy         = errors.New("Invalid proxy configuration")
+	ErrNewLoadEnc       = errors.New("The savedata is encrypted")
+	ErrNewLoadBadFormat = errors.New("The savedata format is invalid")
+)
+
 type ToxErrNew C.enum_TOX_ERR_NEW
 
 const (