func go2mruby(mrb *C.mrb_state, o interface{}) C.mrb_value {
v := reflect.ValueOf(o)
switch v.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return C.mrb_fixnum_value(C.mrb_int(v.Int()))
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return C.mrb_fixnum_value(C.mrb_int(v.Uint()))
case reflect.Float32, reflect.Float64:
return C.mrb_float_value((C.mrb_float)(v.Float()))
case reflect.Complex64, reflect.Complex128:
return C.mrb_float_value((C.mrb_float)(v.Float()))
case reflect.String:
ptr := C.CString(v.String())
return C.mrb_str_new(mrb, ptr, C.strlen(ptr))
case reflect.Bool:
if v.Bool() {
return C.mrb_true_value()
}
return C.mrb_false_value()
case reflect.Array, reflect.Slice:
ary := C.mrb_ary_new(mrb)
for i := 0; i < v.Len(); i++ {
C.mrb_ary_push(mrb, ary, go2mruby(mrb, v.Index(i).Interface()))
}
return ary
case reflect.Map:
hash := C.mrb_hash_new(mrb, 32)
for _, key := range v.MapKeys() {
val := v.MapIndex(key)
C.mrb_hash_set(mrb, hash, go2mruby(mrb, key.String()), go2mruby(mrb, val.Interface()))
}
return hash
case reflect.Interface:
return go2mruby(mrb, v.Elem().Interface())
}
return C.mrb_nil_value()
}
// Converts Go value to mruby value.
func (m *MRuby) mrubyValue(i interface{}) C.mrb_value {
v := reflect.ValueOf(i)
switch v.Kind() {
case reflect.Invalid:
return C.mrb_nil_value() // mrb_undef_value() explodes
case reflect.Bool:
b := v.Bool()
if b {
return C.mrb_true_value()
} else {
return C.mrb_false_value()
}
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return C.mrb_fixnum_value(C.mrb_int(v.Int()))
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return C.mrb_fixnum_value(C.mrb_int(v.Uint()))
case reflect.Float32, reflect.Float64:
return C.mrb_float_value((*C.struct_mrb_state)(m.state), C.mrb_float(v.Float()))
case reflect.String:
cs := C.CString(v.String())
defer C.free(unsafe.Pointer(cs))
if v.Type() == symbolT {
return C.mrb_check_intern_cstr(m.state, cs)
} else {
return C.mrb_str_new_cstr(m.state, cs)
}
case reflect.Array, reflect.Slice:
l := v.Len()
res := C.mrb_ary_new_capa(m.state, C.mrb_int(l))
for i := 0; i < l; i++ {
C.mrb_ary_set(m.state, res, C.mrb_int(i), m.mrubyValue(v.Index(i).Interface()))
}
return res
case reflect.Map:
l := v.Len()
res := C.mrb_hash_new_capa(m.state, C.int(l))
for _, key := range v.MapKeys() {
val := v.MapIndex(key)
C.mrb_hash_set(m.state, res, m.mrubyValue(key.Interface()), m.mrubyValue(val.Interface()))
}
return res
}
panic(fmt.Errorf("gomruby bug: failed to convert Go value %#v (%T) to mruby value", i, i))
}