本文整理匯總了Golang中C.DataValue.len方法的典型用法代碼示例。如果您正苦於以下問題：Golang DataValue.len方法的具體用法？Golang DataValue.len怎麽用？Golang DataValue.len使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類C.DataValue的用法示例。
在下文中一共展示了DataValue.len方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。
示例1: packDataValue
// packDataValue packs the provided Go value into a C.DataValue for
// shiping into C++ land.
//
// For simple types (bool, int, etc) value is converted into a
// native C++ value. For anything else, including cases when value
// has a type that has an underlying simple type, the Go value itself
// is encapsulated into a C++ wrapper so that field access and method
// calls work.
//
// This must be run from the main GUI thread due to the cases where
// calling wrapGoValue is necessary.
func packDataValue(value interface{}, dvalue *C.DataValue, engine *Engine, owner valueOwner) {
datap := unsafe.Pointer(&dvalue.data)
if value == nil {
dvalue.dataType = C.DTInvalid
return
}
switch value := value.(type) {
case string:
dvalue.dataType = C.DTString
cstr, cstrlen := unsafeStringData(value)
*(**C.char)(datap) = cstr
dvalue.len = cstrlen
case bool:
dvalue.dataType = C.DTBool
*(*bool)(datap) = value
case int:
if value > 1<<31-1 {
dvalue.dataType = C.DTInt64
*(*int64)(datap) = int64(value)
} else {
dvalue.dataType = C.DTInt32
*(*int32)(datap) = int32(value)
}
case int64:
dvalue.dataType = C.DTInt64
*(*int64)(datap) = value
case int32:
dvalue.dataType = C.DTInt32
*(*int32)(datap) = value
case uint64:
dvalue.dataType = C.DTUint64
*(*uint64)(datap) = value
case uint32:
dvalue.dataType = C.DTUint32
*(*uint32)(datap) = value
case float64:
dvalue.dataType = C.DTFloat64
*(*float64)(datap) = value
case float32:
dvalue.dataType = C.DTFloat32
*(*float32)(datap) = value
case *Common:
dvalue.dataType = C.DTObject
*(*unsafe.Pointer)(datap) = value.addr
case color.RGBA:
dvalue.dataType = C.DTColor
*(*uint32)(datap) = uint32(value.A)<<24 | uint32(value.R)<<16 | uint32(value.G)<<8 | uint32(value.B)
default:
dvalue.dataType = C.DTObject
if obj, ok := value.(Object); ok {
*(*unsafe.Pointer)(datap) = obj.Common().addr
} else {
*(*unsafe.Pointer)(datap) = wrapGoValue(engine, value, owner)
}
}
}示例2: packDataValue
// packDataValue packs the provided Go value into a C.DataValue for
// shiping into C++ land.
//
// For simple types (bool, int, etc) value is converted into a
// native C++ value. For anything else, including cases when value
// has a type that has an underlying simple type, the Go value itself
// is encapsulated into a C++ wrapper so that field access and method
// calls work.
//
// This must be run from the main GUI thread due to the cases where
// calling wrapGoValue is necessary.
func packDataValue(value interface{}, dvalue *C.DataValue, engine *Engine, owner valueOwner) {
datap := unsafe.Pointer(&dvalue.data)
if value == nil {
dvalue.dataType = C.DTInvalid
return
}
switch value := value.(type) {
case string:
dvalue.dataType = C.DTString
cstr, cstrlen := unsafeStringData(value)
*(**C.char)(datap) = cstr
dvalue.len = cstrlen
case bool:
dvalue.dataType = C.DTBool
*(*bool)(datap) = value
case int:
dvalue.dataType = intDT
*(*int)(datap) = value
case int64:
dvalue.dataType = C.DTInt64
*(*int64)(datap) = value
case int32:
dvalue.dataType = C.DTInt32
*(*int32)(datap) = value
case float64:
dvalue.dataType = C.DTFloat64
*(*float64)(datap) = value
case float32:
dvalue.dataType = C.DTFloat32
*(*float32)(datap) = value
case *Object:
dvalue.dataType = C.DTObject
*(*unsafe.Pointer)(datap) = value.addr
default:
dvalue.dataType = C.DTObject
*(*unsafe.Pointer)(datap) = wrapGoValue(engine, value, owner)
}
}示例3: packDataValue
// packDataValue packs the provided Go value into a C.DataValue for
// shiping into C++ land.
//
// For simple types (bool, int, etc) value is converted into a
// native C++ value. For anything else, including cases when value
// has a type that has an underlying simple type, the Go value itself
// is encapsulated into a C++ wrapper so that field access and method
// calls work.
//
// This must be run from the main GUI thread due to the cases where
// calling wrapGoValue is necessary.
func packDataValue(value interface{}, dvalue *C.DataValue, engine *Engine, owner valueOwner) {
datap := unsafe.Pointer(&dvalue.data)
if value == nil {
dvalue.dataType = C.DTInvalid
return
}
switch value := value.(type) {
case string:
dvalue.dataType = C.DTString
cstr, cstrlen := unsafeStringData(value)
*(**C.char)(datap) = cstr
dvalue.len = cstrlen
case bool:
dvalue.dataType = C.DTBool
*(*bool)(datap) = value
case int:
if value > 1<<31-1 {
dvalue.dataType = C.DTInt64
*(*int64)(datap) = int64(value)
} else {
dvalue.dataType = C.DTInt32
*(*int32)(datap) = int32(value)
}
case int64:
dvalue.dataType = C.DTInt64
*(*int64)(datap) = value
case int32:
dvalue.dataType = C.DTInt32
*(*int32)(datap) = value
case uint64:
dvalue.dataType = C.DTUint64
*(*uint64)(datap) = value
case uint32:
dvalue.dataType = C.DTUint32
*(*uint32)(datap) = value
case float64:
dvalue.dataType = C.DTFloat64
*(*float64)(datap) = value
case float32:
dvalue.dataType = C.DTFloat32
*(*float32)(datap) = value
case *Common:
dvalue.dataType = C.DTObject
*(*unsafe.Pointer)(datap) = value.addr
case color.RGBA:
dvalue.dataType = C.DTColor
*(*uint32)(datap) = uint32(value.A)<<24 | uint32(value.R)<<16 | uint32(value.G)<<8 | uint32(value.B)
default:
rv := reflect.ValueOf(value)
switch rv.Type().Kind() {
case reflect.Ptr:
rv = rv.Elem()
if rv.Kind() != reflect.Array && rv.Kind() != reflect.Slice {
break
}
fallthrough
case reflect.Array, reflect.Slice:
dvalue.dataType = C.DTVariantList
dataValues := make([]C.DataValue, rv.Len())
for i := range dataValues {
packDataValue(rv.Index(i).Interface(), &dataValues[i], engine, owner)
}
switch len(dataValues) {
case 0:
*(*unsafe.Pointer)(unsafe.Pointer(&dvalue.data)) = C.newVariantList(nil, 0)
default:
*(*unsafe.Pointer)(unsafe.Pointer(&dvalue.data)) = C.newVariantList(&dataValues[0], C.int(len(dataValues)))
}
return
}
dvalue.dataType = C.DTObject
if obj, ok := value.(Object); ok {
*(*unsafe.Pointer)(datap) = obj.Common().addr
} else {
*(*unsafe.Pointer)(datap) = wrapGoValue(engine, value, owner)
}
}
}