119 lines
3.2 KiB
Go
119 lines
3.2 KiB
Go
package main
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func (s *Struct) Define(c *Context) {
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c.Putln("type %s struct {", s.SrcName())
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for _, field := range s.Fields {
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field.Define(c)
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}
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c.Putln("}")
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c.Putln("")
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// Write function that reads bytes and produces this struct.
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s.Read(c)
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// Write function that reads bytes and produces a list of this struct.
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s.ReadList(c)
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// Write function that writes bytes given this struct.
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s.Write(c)
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// Write function that writes a list of this struct.
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s.WriteList(c)
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// Write function that computes the size of a list of these structs,
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// IF there is a list field in this struct.
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if s.HasList() {
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s.WriteListSize(c)
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}
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}
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// Read for a struct creates a function 'ReadStructName' that takes a source
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// byte slice (i.e., the buffer) and a destination struct, and returns
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// the number of bytes read off the buffer.
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// 'ReadStructName' should only be used to read raw reply data from the wire.
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func (s *Struct) Read(c *Context) {
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c.Putln("// %sRead reads a byte slice into a %s value.",
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s.SrcName(), s.SrcName())
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c.Putln("func %sRead(buf []byte, v *%s) int {", s.SrcName(), s.SrcName())
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c.Putln("b := 0")
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c.Putln("")
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for _, field := range s.Fields {
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field.Read(c, "v.")
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c.Putln("")
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}
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c.Putln("return b")
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c.Putln("}")
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c.Putln("")
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}
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// ReadList for a struct creates a function 'ReadStructNameList' that takes
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// a source (i.e., the buffer) byte slice, and a destination slice and returns
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// the number of bytes read from the byte slice.
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func (s *Struct) ReadList(c *Context) {
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c.Putln("// %sReadList reads a byte slice into a list of %s values.",
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s.SrcName(), s.SrcName())
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c.Putln("func %sReadList(buf []byte, dest []%s) int {",
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s.SrcName(), s.SrcName())
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c.Putln("b := 0")
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c.Putln("for i := 0; i < len(dest); i++ {")
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c.Putln("dest[i] = %s{}", s.SrcName())
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c.Putln("b += %sRead(buf[b:], &dest[i])", s.SrcName())
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c.Putln("}")
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c.Putln("return xgb.Pad(b)")
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c.Putln("}")
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c.Putln("")
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}
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func (s *Struct) Write(c *Context) {
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c.Putln("// Bytes writes a %s value to a byte slice.", s.SrcName())
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c.Putln("func (v %s) Bytes() []byte {", s.SrcName())
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c.Putln("buf := make([]byte, %s)", s.Size().Reduce("v."))
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c.Putln("b := 0")
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c.Putln("")
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for _, field := range s.Fields {
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field.Write(c, "v.")
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c.Putln("")
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}
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c.Putln("return buf")
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c.Putln("}")
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c.Putln("")
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}
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func (s *Struct) WriteList(c *Context) {
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c.Putln("// %sListBytes writes a list of %s values to a byte slice.",
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s.SrcName(), s.SrcName())
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c.Putln("func %sListBytes(buf []byte, list []%s) int {",
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s.SrcName(), s.SrcName())
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c.Putln("b := 0")
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c.Putln("var structBytes []byte")
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c.Putln("for _, item := range list {")
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c.Putln("structBytes = item.Bytes()")
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c.Putln("copy(buf[b:], structBytes)")
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c.Putln("b += len(structBytes)")
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c.Putln("}")
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c.Putln("return xgb.Pad(b)")
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c.Putln("}")
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c.Putln("")
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}
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func (s *Struct) WriteListSize(c *Context) {
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c.Putln("// %sListSize computes the size (bytes) of a list of %s values.",
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s.SrcName(), s.SrcName())
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c.Putln("func %sListSize(list []%s) int {", s.SrcName(), s.SrcName())
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c.Putln("size := 0")
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if s.Size().Expression.Concrete() {
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c.Putln("for _ = range list {")
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} else {
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c.Putln("for _, item := range list {")
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}
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c.Putln("size += %s", s.Size().Reduce("item."))
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c.Putln("}")
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c.Putln("return size")
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c.Putln("}")
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c.Putln("")
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}
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