github.com/goplus/llgo@v0.8.3/internal/runtime/z_iface.go (about)

     1  /*
     2   * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package runtime
    18  
    19  import (
    20  	"unsafe"
    21  
    22  	"github.com/goplus/llgo/internal/abi"
    23  )
    24  
    25  // -----------------------------------------------------------------------------
    26  
    27  type InterfaceType = abi.InterfaceType
    28  
    29  var (
    30  	TyAny = &InterfaceType{}
    31  )
    32  
    33  // -----------------------------------------------------------------------------
    34  
    35  type Interface = iface
    36  
    37  func MakeAnyInt(typ *Type, data uintptr) Interface {
    38  	tab := &itab{inter: TyAny, _type: typ, hash: 0, fun: [1]uintptr{0}}
    39  	return Interface{
    40  		tab: tab, data: unsafe.Pointer(data),
    41  	}
    42  }
    43  
    44  func MakeAnyString(data string) Interface {
    45  	typ := basicTypes[abi.String]
    46  	tab := &itab{inter: TyAny, _type: typ, hash: 0, fun: [1]uintptr{0}}
    47  	return Interface{
    48  		tab: tab, data: unsafe.Pointer(&data),
    49  	}
    50  }
    51  
    52  func MakeAny(typ *Type, data unsafe.Pointer) Interface {
    53  	tab := &itab{inter: TyAny, _type: typ, hash: 0, fun: [1]uintptr{0}}
    54  	return Interface{
    55  		tab: tab, data: data,
    56  	}
    57  }
    58  
    59  func MakeInterface(inter *InterfaceType, typ *Type, data unsafe.Pointer) Interface {
    60  	tab := &itab{inter: inter, _type: typ, hash: 0, fun: [1]uintptr{0}}
    61  	return Interface{
    62  		tab: tab, data: data,
    63  	}
    64  }
    65  
    66  func I2Int(v Interface, t *Type) uintptr {
    67  	if v.tab._type == t {
    68  		return uintptr(v.data)
    69  	}
    70  	panic("I2Int: type mismatch")
    71  }
    72  
    73  func CheckI2Int(v Interface, t *Type) (uintptr, bool) {
    74  	if v.tab._type == t {
    75  		return uintptr(v.data), true
    76  	}
    77  	return 0, false
    78  }
    79  
    80  func I2String(v Interface, t *Type) string {
    81  	if v.tab._type == t {
    82  		return *(*string)(v.data)
    83  	}
    84  	panic("I2String: type mismatch")
    85  }
    86  
    87  func CheckI2String(v Interface, t *Type) (string, bool) {
    88  	if v.tab._type == t {
    89  		return *(*string)(v.data), true
    90  	}
    91  	return "", false
    92  }
    93  
    94  // -----------------------------------------------------------------------------