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package main
import (
"fmt"
"log"
)
func (f *SingleField) Define(c *Context) {
c.Putln("%s %s", f.SrcName(), f.Type.SrcName())
}
func ReadSimpleSingleField(c *Context, name string, typ Type) {
switch t := typ.(type) {
case *Resource:
c.Putln("%s = %s(Get32(buf[b:]))", name, t.SrcName())
case *TypeDef:
switch t.Size().Eval() {
case 1:
c.Putln("%s = %s(buf[b])", name, t.SrcName())
case 2:
c.Putln("%s = %s(Get16(buf[b:]))", name, t.SrcName())
case 4:
c.Putln("%s = %s(Get32(buf[b:]))", name, t.SrcName())
case 8:
c.Putln("%s = %s(Get64(buf[b:]))", name, t.SrcName())
}
case *Base:
// If this is a bool, stop short and do something special.
if t.SrcName() == "bool" {
c.Putln("if buf[b] == 1 {")
c.Putln("%s = true", name)
c.Putln("} else {")
c.Putln("%s = false", name)
c.Putln("}")
break
}
var val string
switch t.Size().Eval() {
case 1:
val = fmt.Sprintf("buf[b]")
case 2:
val = fmt.Sprintf("Get16(buf[b:])")
case 4:
val = fmt.Sprintf("Get32(buf[b:])")
case 8:
val = fmt.Sprintf("Get64(buf[b:])")
}
// We need to convert base types if they aren't uintXX or byte
ty := t.SrcName()
if ty != "byte" && ty != "uint16" && ty != "uint32" && ty != "uint64" {
val = fmt.Sprintf("%s(%s)", ty, val)
}
c.Putln("%s = %s", name, val)
default:
log.Panicf("Cannot read field '%s' as a simple field with %T type.",
name, typ)
}
c.Putln("b += %s", typ.Size())
}
func (f *SingleField) Read(c *Context, prefix string) {
switch t := f.Type.(type) {
case *Resource:
ReadSimpleSingleField(c, fmt.Sprintf("%s%s", prefix, f.SrcName()), t)
case *TypeDef:
ReadSimpleSingleField(c, fmt.Sprintf("%s%s", prefix, f.SrcName()), t)
case *Base:
ReadSimpleSingleField(c, fmt.Sprintf("%s%s", prefix, f.SrcName()), t)
case *Struct:
c.Putln("%s%s = %s{}", prefix, f.SrcName(), t.SrcName())
c.Putln("b += Read%s(buf[b:], &%s%s)", t.SrcName(), prefix, f.SrcName())
case *Union:
c.Putln("%s%s = %s{}", prefix, f.SrcName(), t.SrcName())
c.Putln("b += Read%s(buf[b:], &%s%s)", t.SrcName(), prefix, f.SrcName())
default:
log.Panicf("Cannot read field '%s' with %T type.", f.XmlName(), f.Type)
}
}
func WriteSimpleSingleField(c *Context, name string, typ Type) {
switch t := typ.(type) {
case *Resource:
c.Putln("Put32(buf[b:], uint32(%s))", name)
case *TypeDef:
switch t.Size().Eval() {
case 1:
c.Putln("buf[b] = byte(%s)", name)
case 2:
c.Putln("Put16(buf[b:], uint16(%s))", name)
case 4:
c.Putln("Put32(buf[b:], uint32(%s))", name)
case 8:
c.Putln("Put64(buf[b:], uint64(%s))", name)
}
case *Base:
// If this is a bool, stop short and do something special.
if t.SrcName() == "bool" {
c.Putln("if %s {", name)
c.Putln("buf[b] = 1")
c.Putln("} else {")
c.Putln("buf[b] = 0")
c.Putln("}")
break
}
switch t.Size().Eval() {
case 1:
if t.SrcName() != "byte" {
c.Putln("buf[b] = byte(%s)", name)
} else {
c.Putln("buf[b] = %s", name)
}
case 2:
if t.SrcName() != "uint16" {
c.Putln("Put16(buf[b:], uint16(%s))", name)
} else {
c.Putln("Put16(buf[b:], %s)", name)
}
case 4:
if t.SrcName() != "uint32" {
c.Putln("Put32(buf[b:], uint32(%s))", name)
} else {
c.Putln("Put32(buf[b:], %s)", name)
}
case 8:
if t.SrcName() != "uint64" {
c.Putln("Put64(buf[b:], uint64(%s))", name)
} else {
c.Putln("Put64(buf[b:], %s)", name)
}
}
default:
log.Fatalf("Cannot read field '%s' as a simple field with %T type.",
name, typ)
}
c.Putln("b += %s", typ.Size())
}
func (f *SingleField) Write(c *Context, prefix string) {
switch t := f.Type.(type) {
case *Resource:
WriteSimpleSingleField(c, fmt.Sprintf("%s%s", prefix, f.SrcName()), t)
case *TypeDef:
WriteSimpleSingleField(c, fmt.Sprintf("%s%s", prefix, f.SrcName()), t)
case *Base:
WriteSimpleSingleField(c, fmt.Sprintf("%s%s", prefix, f.SrcName()), t)
case *Union:
c.Putln("{")
c.Putln("unionBytes := %s%s.Bytes()", prefix, f.SrcName())
c.Putln("copy(buf[b:], unionBytes)")
c.Putln("b += pad(len(unionBytes))")
c.Putln("}")
case *Struct:
c.Putln("{")
c.Putln("structBytes := %s%s.Bytes()", prefix, f.SrcName())
c.Putln("copy(buf[b:], structBytes)")
c.Putln("b += pad(len(structBytes))")
c.Putln("}")
default:
log.Fatalf("Cannot read field '%s' with %T type.", f.XmlName(), f.Type)
}
}
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