finally starting on the crescendo: requests and replies.

nexgb/xgbgen/go_error.go

@@ -3,15 +3,53 @@ package main
 // Error types
 func (e *Error) Define(c *Context) {
 	c.Putln("// Error definition %s (%d)", e.SrcName(), e.Number)
+	c.Putln("// Size: %s", e.Size())
+	c.Putln("")
+	c.Putln("const %s = %d", e.ErrConst(), e.Number)
+	c.Putln("")
+	c.Putln("type %s struct {", e.ErrType())
+	c.Putln("Sequence uint16")
+	c.Putln("NiceName string")
+	for _, field := range e.Fields {
+		field.Define(c)
+	}
+	c.Putln("}")
+	c.Putln("")
+
+	// Read defines a function that transforms a byte slice into this
+	// error struct.
+	e.Read(c)
+
+	// Makes sure that this error type is an Error interface.
+	c.Putln("func (v %s) ImplementsError() { }", e.ErrType())
+	c.Putln("")
+
+	// Let's the XGB event loop read this error.
+	c.Putln("func init() {")
+	c.Putln("newErrorFuncs[%d] = New%s", e.Number, e.ErrType())
+	c.Putln("}")
 	c.Putln("")
 }
 
-func (e *Error) Read(c *Context, prefix string) {
+func (e *Error) Read(c *Context) {
 	c.Putln("// Error read %s", e.SrcName())
-}
-
-func (e *Error) Write(c *Context, prefix string) {
-	c.Putln("// Error write %s", e.SrcName())
+	c.Putln("func New%s(buf []byte) %s {", e.ErrType(), e.ErrType())
+	c.Putln("v := %s{}", e.ErrType())
+	c.Putln("v.NiceName = \"%s\"", e.SrcName())
+	c.Putln("")
+	c.Putln("b := 1 // skip error determinant")
+	c.Putln("b += 1 // don't read error number")
+	c.Putln("")
+	c.Putln("v.Sequence = get16(buf[b:])")
+	c.Putln("b += 2")
+	c.Putln("")
+	for _, field := range e.Fields {
+		field.Read(c)
+		c.Putln("")
+	}
+	c.Putln("return v")
+	c.Putln("}")
+	c.Putln("")
 }
 
 // ErrorCopy types
@@ -27,31 +65,20 @@ func (e *ErrorCopy) Define(c *Context) {
 	// error struct.
 	e.Read(c)
 
-	// Write defines a function that transoforms this error struct into
-	// a byte slice.
-	e.Write(c)
-
 	// Makes sure that this error type is an Error interface.
 	c.Putln("func (err %s) ImplementsError() { }", e.ErrType())
 	c.Putln("")
 
 	// Let's the XGB know how to read this error.
 	c.Putln("func init() {")
-	c.Putln("newErrorFuncs[%d] = New%s", e.Number, e.SrcName())
+	c.Putln("newErrorFuncs[%d] = New%s", e.Number, e.ErrType())
 	c.Putln("}")
 	c.Putln("")
 }
 
 func (e *ErrorCopy) Read(c *Context) {
-	c.Putln("func New%s(buf []byte) %s {", e.SrcName(), e.ErrType())
-	c.Putln("return (%s)(New%s(buf))", e.ErrType(), e.Old.SrcName())
-	c.Putln("}")
-	c.Putln("")
-}
-
-func (e *ErrorCopy) Write(c *Context) {
-	c.Putln("func (err %s) Bytes() []byte {", e.ErrType())
-	c.Putln("return (%s)(err).Bytes()", e.Old.(*Error).ErrType())
+	c.Putln("func New%s(buf []byte) %s {", e.ErrType(), e.ErrType())
+	c.Putln("return %s(New%s(buf))", e.ErrType(), e.Old.(*Error).ErrType())
 	c.Putln("}")
 	c.Putln("")
 }