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package main
import (
"fmt"
"log"
"strings"
)
// List fields
func (f *ListField) Define(c *Context) {
c.Putln("%s %s // size: %s",
f.SrcName(), f.SrcType(), f.Size())
}
func (f *ListField) Read(c *Context, prefix string) {
switch t := f.Type.(type) {
case *Resource:
length := f.LengthExpr.Reduce(prefix)
c.Putln("%s%s = make([]%s, %s)",
prefix, f.SrcName(), t.SrcName(), length)
c.Putln("for i := 0; i < int(%s); i++ {", length)
ReadSimpleSingleField(c, fmt.Sprintf("%s%s[i]", prefix, f.SrcName()), t)
c.Putln("}")
c.Putln("b = xgb.Pad(b)")
case *Base:
length := f.LengthExpr.Reduce(prefix)
if strings.ToLower(t.XmlName()) == "char" {
c.Putln("{")
c.Putln("byteString := make([]%s, %s)", t.SrcName(), length)
c.Putln("copy(byteString[:%s], buf[b:])", length)
c.Putln("%s%s = string(byteString)", prefix, f.SrcName())
// This is apparently a special case. The "Str" type itself
// doesn't specify any padding. I suppose it's up to the
// request/reply spec that uses it to get the padding right?
c.Putln("b += int(%s)", length)
c.Putln("}")
} else if t.SrcName() == "byte" {
c.Putln("%s%s = make([]%s, %s)",
prefix, f.SrcName(), t.SrcName(), length)
c.Putln("copy(%s%s[:%s], buf[b:])", prefix, f.SrcName(), length)
c.Putln("b += xgb.Pad(int(%s))", length)
} else {
c.Putln("%s%s = make([]%s, %s)",
prefix, f.SrcName(), t.SrcName(), length)
c.Putln("for i := 0; i < int(%s); i++ {", length)
ReadSimpleSingleField(c,
fmt.Sprintf("%s%s[i]", prefix, f.SrcName()), t)
c.Putln("}")
c.Putln("b = xgb.Pad(b)")
}
case *TypeDef:
length := f.LengthExpr.Reduce(prefix)
c.Putln("%s%s = make([]%s, %s)",
prefix, f.SrcName(), t.SrcName(), length)
c.Putln("for i := 0; i < int(%s); i++ {", length)
ReadSimpleSingleField(c, fmt.Sprintf("%s%s[i]", prefix, f.SrcName()), t)
c.Putln("}")
c.Putln("b = xgb.Pad(b)")
case *Union:
c.Putln("%s%s = make([]%s, %s)",
prefix, f.SrcName(), t.SrcName(), f.LengthExpr.Reduce(prefix))
c.Putln("b += %sReadList(buf[b:], %s%s)",
t.SrcName(), prefix, f.SrcName())
case *Struct:
c.Putln("%s%s = make([]%s, %s)",
prefix, f.SrcName(), t.SrcName(), f.LengthExpr.Reduce(prefix))
c.Putln("b += %sReadList(buf[b:], %s%s)",
t.SrcName(), prefix, f.SrcName())
default:
log.Panicf("Cannot read list field '%s' with %T type.",
f.XmlName(), f.Type)
}
}
func (f *ListField) Write(c *Context, prefix string) {
switch t := f.Type.(type) {
case *Resource:
length := f.Length().Reduce(prefix)
c.Putln("for i := 0; i < int(%s); i++ {", length)
WriteSimpleSingleField(c,
fmt.Sprintf("%s%s[i]", prefix, f.SrcName()), t)
c.Putln("}")
c.Putln("b = xgb.Pad(b)")
case *Base:
length := f.Length().Reduce(prefix)
if t.SrcName() == "byte" {
c.Putln("copy(buf[b:], %s%s[:%s])", prefix, f.SrcName(), length)
c.Putln("b += xgb.Pad(int(%s))", length)
} else {
c.Putln("for i := 0; i < int(%s); i++ {", length)
WriteSimpleSingleField(c,
fmt.Sprintf("%s%s[i]", prefix, f.SrcName()), t)
c.Putln("}")
c.Putln("b = xgb.Pad(b)")
}
case *TypeDef:
length := f.Length().Reduce(prefix)
c.Putln("for i := 0; i < int(%s); i++ {", length)
WriteSimpleSingleField(c,
fmt.Sprintf("%s%s[i]", prefix, f.SrcName()), t)
c.Putln("}")
c.Putln("b = xgb.Pad(b)")
case *Union:
c.Putln("b += %sListBytes(buf[b:], %s%s)",
t.SrcName(), prefix, f.SrcName())
case *Struct:
c.Putln("b += %sListBytes(buf[b:], %s%s)",
t.SrcName(), prefix, f.SrcName())
default:
log.Panicf("Cannot write list field '%s' with %T type.",
f.XmlName(), f.Type)
}
}
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