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package main
import (
"fmt"
"strings"
)
func (r *Request) Define(c *Context) {
c.Putln("// Request %s", r.SrcName())
c.Putln("// size: %s", r.Size(c))
if r.Reply != nil {
c.Putln("func (c *Conn) %s(%s) (*%s, error) {",
r.SrcName(), r.ParamNameTypes(), r.ReplyName())
c.Putln("return c.%s(c.%s(%s))",
r.ReplyName(), r.ReqName(), r.ParamNames())
c.Putln("}")
c.Putln("")
r.WriteRequest(c)
r.ReadReply(c)
} else {
c.Putln("// Write request to wire for %s", r.SrcName())
c.Putln("func (c *Conn) %s(%s) {", r.SrcName(), r.ParamNameTypes())
r.WriteRequestFields(c)
c.Putln("c.sendRequest(false, buf)")
c.Putln("}")
c.Putln("")
}
}
func (r *Request) ReadReply(c *Context) {
c.Putln("// Request reply for %s", r.SrcName())
c.Putln("// size: %s", r.Reply.Size())
c.Putln("type %s struct {", r.ReplyName())
c.Putln("Sequence uint16")
c.Putln("Length uint32")
for _, field := range r.Reply.Fields {
field.Define(c)
}
c.Putln("}")
c.Putln("")
c.Putln("// Read reply %s", r.SrcName())
c.Putln("func (c *Conn) %s(cook *Cookie) (*%s, error) {",
r.ReplyName(), r.ReplyName())
c.Putln("buf, err := c.waitForReply(cook)")
c.Putln("if err != nil {")
c.Putln("return nil, err")
c.Putln("}")
c.Putln("")
c.Putln("v := new(%s)", r.ReplyName())
c.Putln("b := 1 // skip reply determinant")
c.Putln("")
for i, field := range r.Reply.Fields {
if i == 1 {
c.Putln("v.Sequence = Get16(buf[b:])")
c.Putln("b += 2")
c.Putln("")
c.Putln("v.Length = Get32(buf[b:]) // 4-byte units")
c.Putln("b += 4")
c.Putln("")
}
field.Read(c, "v.")
c.Putln("")
}
c.Putln("return v, nil")
c.Putln("}")
c.Putln("")
}
func (r *Request) WriteRequest(c *Context) {
c.Putln("// Write request to wire for %s", r.SrcName())
c.Putln("func (c *Conn) %s(%s) *Cookie {", r.ReqName(), r.ParamNameTypes())
r.WriteRequestFields(c)
c.Putln("return c.sendRequest(true, buf)")
c.Putln("}")
c.Putln("")
}
func (r *Request) WriteRequestFields(c *Context) {
c.Putln("size := %s", r.Size(c))
c.Putln("b := 0")
c.Putln("buf := make([]byte, size)")
c.Putln("")
c.Putln("buf[b] = %d // request opcode", r.Opcode)
c.Putln("b += 1")
c.Putln("")
for i, field := range r.Fields {
if i == 1 {
c.Putln("Put16(buf[b:], uint16(size / 4)) "+
"// write request size in 4-byte units")
c.Putln("b += 2")
c.Putln("")
}
field.Write(c, "")
c.Putln("")
}
}
func (r *Request) ParamNames() string {
names := make([]string, 0, len(r.Fields))
for _, field := range r.Fields {
switch f := field.(type) {
case *ValueField:
names = append(names, f.MaskName)
names = append(names, f.ListName)
case *PadField:
continue
case *ExprField:
continue
default:
names = append(names, fmt.Sprintf("%s", field.SrcName()))
}
}
return strings.Join(names, ",")
}
func (r *Request) ParamNameTypes() string {
nameTypes := make([]string, 0, len(r.Fields))
for _, field := range r.Fields {
switch f := field.(type) {
case *ValueField:
// mofos...
if r.SrcName() != "ConfigureWindow" {
nameTypes = append(nameTypes,
fmt.Sprintf("%s %s", f.MaskName, f.MaskType.SrcName()))
}
nameTypes = append(nameTypes,
fmt.Sprintf("%s []uint32", f.ListName))
case *PadField:
continue
case *ExprField:
continue
default:
nameTypes = append(nameTypes,
fmt.Sprintf("%s %s", field.SrcName(), field.SrcType()))
}
}
return strings.Join(nameTypes, ",")
}
|
