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package mangler
import (
"unsafe"
"codeberg.org/gruf/go-xunsafe"
)
// iterMapType returns a Mangler capable of iterating
// and mangling the given map type currently in TypeIter{}.
// note this will fetch sub-Manglers for key / value types.
func iterMapType(t xunsafe.TypeIter) Mangler {
// Key / value types.
key := t.Type.Key()
elem := t.Type.Elem()
// Get nested k / v TypeIters with appropriate flags.
flagsKey := xunsafe.ReflectMapKeyFlags(key)
flagsVal := xunsafe.ReflectMapElemFlags(elem)
kt := t.Child(key, flagsKey)
vt := t.Child(elem, flagsVal)
// Get key mangler.
kfn := loadOrGet(kt)
if kfn == nil {
return nil
}
// Get value mangler.
vfn := loadOrGet(vt)
if vfn == nil {
return nil
}
// Final map type.
rtype := t.Type
flags := t.Flag
return func(buf []byte, ptr unsafe.Pointer) []byte {
if ptr == nil || *(*unsafe.Pointer)(ptr) == nil {
// Append nil indicator.
buf = append(buf, '0')
return buf
}
// Build reflect value, and then a map iterator.
v := xunsafe.BuildReflectValue(rtype, ptr, flags)
i := xunsafe.GetMapIter(v)
// Before len.
l := len(buf)
// Append not-nil flag.
buf = append(buf, '1')
for i.Next() {
// Pass to map key func.
ptr = xunsafe.Map_Key(i)
buf = kfn(buf, ptr)
// Add key seperator.
buf = append(buf, ':')
// Pass to map elem func.
ptr = xunsafe.Map_Elem(i)
buf = vfn(buf, ptr)
// Add comma seperator.
buf = append(buf, ',')
}
if len(buf) != l {
// Drop final comma.
buf = buf[:len(buf)-1]
}
return buf
}
}
|
