github.com/cloudwego/frugal@v0.1.15/internal/binary/decoder/state.go (about)

     1  /*
     2   * Copyright 2022 ByteDance Inc.
     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 decoder
    18  
    19  import (
    20      `unsafe`
    21  
    22      `github.com/cloudwego/frugal/internal/binary/defs`
    23      `github.com/cloudwego/frugal/internal/rt`
    24  )
    25  
    26  const (
    27      NbOffset = int64(unsafe.Offsetof(StateItem{}.Nb))
    28      MpOffset = int64(unsafe.Offsetof(StateItem{}.Mp))
    29      WpOffset = int64(unsafe.Offsetof(StateItem{}.Wp))
    30      FmOffset = int64(unsafe.Offsetof(StateItem{}.Fm))
    31  )
    32  
    33  const (
    34      SkOffset = int64(unsafe.Offsetof(RuntimeState{}.Sk))
    35      PrOffset = int64(unsafe.Offsetof(RuntimeState{}.Pr))
    36      IvOffset = int64(unsafe.Offsetof(RuntimeState{}.Iv))
    37  )
    38  
    39  const (
    40      StateMax  = (defs.StackSize - 1) * StateSize
    41      StateSize = int64(unsafe.Sizeof(StateItem{}))
    42  )
    43  
    44  type SkipItem struct {
    45      T defs.Tag
    46      K defs.Tag
    47      V defs.Tag
    48      N uint32
    49  }
    50  
    51  type StateItem struct {
    52      Nb uint64
    53      Mp *rt.GoMap
    54      Wp unsafe.Pointer
    55      Fm *FieldBitmap
    56  }
    57  
    58  type RuntimeState struct {
    59      St [defs.StackSize]StateItem    // Must be the first field.
    60      Sk [defs.StackSize]SkipItem     // Skip buffer, used for non-recursive skipping
    61      Pr unsafe.Pointer               // Pointer spill space, used for non-fast string or pointer map access.
    62      Iv uint64                       // Integer spill space, used for non-fast string map access.
    63  }