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authorAndrew Gallant (Ocelot) <Andrew.Gallant@tufts.edu>2012-05-01 01:08:03 -0400
committerAndrew Gallant (Ocelot) <Andrew.Gallant@tufts.edu>2012-05-01 01:08:03 -0400
commit83a71d464887f4b6cf9124d2f8c565e6f17f2bd3 (patch)
treeca86805900a974f684dc5531311a53e4836ec784 /nexgb/xgbgen/go_event.go
parent73154769b3eba60fe48a7c08882e8e64b1545e3f (diff)
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unions, events and errors... oh my
Diffstat (limited to 'nexgb/xgbgen/go_event.go')
-rw-r--r--nexgb/xgbgen/go_event.go97
1 files changed, 88 insertions, 9 deletions
diff --git a/nexgb/xgbgen/go_event.go b/nexgb/xgbgen/go_event.go
index d91fd7a..e6d40b0 100644
--- a/nexgb/xgbgen/go_event.go
+++ b/nexgb/xgbgen/go_event.go
@@ -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("")
+
+ // 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("")
- c.Putln("func (ev %s) ImplementsEvent() { }", e.EvType())
- c.Putln("")
- c.Putln("func (ev %s) Bytes() []byte {", e.EvType())
+}
+
+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("")
- c.Putln("func init() {")
- c.Putln("newEventFuncs[%d] = New%s", e.Number, e.SrcName())
- c.Putln("}")
- c.Putln("")
}