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unions, events and errors... oh my

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This commit is contained in:
Andrew Gallant (Ocelot)
2012-05-01 01:08:03 -04:00
parent 73154769b3
commit 83a71d4648
8 changed files with 317 additions and 38 deletions
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101
nexgb/xgbgen/go_event.go
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@@ -3,14 +3,75 @@ package main
// Event types
func (e *Event) Define(c *Context) {
c.Putln("// Event definition %s (%d)", e.SrcName(), e.Number)
c.Putln("// Size: %s", e.Size())
c.Putln("type %s struct {", e.EvType())
c.Putln("Sequence uint16")
for _, field := range e.Fields {
field.Define(c)
}
c.Putln("}")
c.Putln("")
// Read defines a function that transforms a byte slice into this
// event struct.
e.Read(c)
// Write defines a function that transoforms this event struct into
// a byte slice.
e.Write(c)
// Makes sure that this event type is an Event interface.
c.Putln("func (v %s) ImplementsEvent() { }", e.EvType())
c.Putln("")
// Let's the XGB event loop read this event.
c.Putln("func init() {")
c.Putln("newEventFuncs[%d] = New%s", e.Number, e.SrcName())
c.Putln("}")
c.Putln("")
}
func (e *Event) Read(c *Context, prefix string) {
func (e *Event) Read(c *Context) {
c.Putln("// Event read %s", e.SrcName())
c.Putln("func New%s(buf []byte) %s {", e.SrcName(), e.EvType())
c.Putln("v := %s{}", e.EvType())
c.Putln("b := 1 // don't read event number")
c.Putln("")
for i, field := range e.Fields {
if i == 1 && !e.NoSequence {
c.Putln("v.Sequence = get16(buf[b:])")
c.Putln("b += 2")
c.Putln("")
}
field.Read(c)
c.Putln("")
}
c.Putln("return v")
c.Putln("}")
c.Putln("")
}
func (e *Event) Write(c *Context, prefix string) {
func (e *Event) Write(c *Context) {
c.Putln("// Event write %s", e.SrcName())
c.Putln("func (v %s) Bytes() []byte {", e.EvType())
c.Putln("buf := make([]byte, %s)", e.Size())
c.Putln("b := 0")
c.Putln("")
c.Putln("// write event number")
c.Putln("buf[b] = %d", e.Number)
c.Putln("b += 1")
c.Putln("")
for i, field := range e.Fields {
if i == 1 && !e.NoSequence {
c.Putln("b += 2 // skip sequence number")
c.Putln("")
}
field.Write(c)
c.Putln("")
}
c.Putln("return buf")
c.Putln("}")
c.Putln("")
}
// EventCopy types
@@ -21,18 +82,36 @@ func (e *EventCopy) Define(c *Context) {
c.Putln("")
c.Putln("type %s %s", e.EvType(), e.Old.(*Event).EvType())
c.Putln("")
c.Putln("func New%s(buf []byte) %s {", e.SrcName(), e.EvType())
c.Putln("return (%s)(New%s(buf))", e.EvType(), e.Old.SrcName())
c.Putln("}")
c.Putln("")
c.Putln("func (ev %s) ImplementsEvent() { }", e.EvType())
c.Putln("")
c.Putln("func (ev %s) Bytes() []byte {", e.EvType())
c.Putln("return (%s)(ev).Bytes()", e.Old.(*Event).EvType())
c.Putln("}")
// Read defines a function that transforms a byte slice into this
// event struct.
e.Read(c)
// Write defines a function that transoforms this event struct into
// a byte slice.
e.Write(c)
// Makes sure that this event type is an Event interface.
c.Putln("func (v %s) ImplementsEvent() { }", e.EvType())
c.Putln("")
// Let's the XGB event loop read this event.
c.Putln("func init() {")
c.Putln("newEventFuncs[%d] = New%s", e.Number, e.SrcName())
c.Putln("}")
c.Putln("")
}
func (e *EventCopy) Read(c *Context) {
c.Putln("func New%s(buf []byte) %s {", e.SrcName(), e.EvType())
c.Putln("return (%s)(New%s(buf))", e.EvType(), e.Old.SrcName())
c.Putln("}")
c.Putln("")
}
func (e *EventCopy) Write(c *Context) {
c.Putln("func (v %s) Bytes() []byte {", e.EvType())
c.Putln("return (%s)(ev).Bytes()", e.Old.(*Event).EvType())
c.Putln("}")
c.Putln("")
}