unquote.go

Documentation: github.com/bytedance/sonic/unquote

     1  /*
     2   * Copyright 2021 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 unquote
    18  
    19  import (
    20      `unsafe`
    21      `runtime`
    22  
    23      `github.com/bytedance/sonic/internal/native`
    24      `github.com/bytedance/sonic/internal/native/types`
    25      `github.com/bytedance/sonic/internal/rt`
    26  )
    27  
    28  func String(s string) (ret string, err types.ParsingError) {
    29      mm := make([]byte, 0, len(s))
    30      err = intoBytesUnsafe(s, &mm)
    31      ret = rt.Mem2Str(mm)
    32      return
    33  }
    34  
    35  func IntoBytes(s string, m *[]byte) types.ParsingError {
    36      if cap(*m) < len(s) {
    37          return types.ERR_EOF
    38      } else {
    39          return intoBytesUnsafe(s, m)
    40      }
    41  }
    42  
    43  func intoBytesUnsafe(s string, m *[]byte) types.ParsingError {
    44      pos := -1
    45      slv := (*rt.GoSlice)(unsafe.Pointer(m))
    46      str := (*rt.GoString)(unsafe.Pointer(&s))
    47      /* unquote as the default configuration, replace invalid unicode with \ufffd */
    48      ret := native.Unquote(str.Ptr, str.Len, slv.Ptr, &pos, types.F_UNICODE_REPLACE)
    49  
    50      /* check for errors */
    51      if ret < 0 {
    52          return types.ParsingError(-ret)
    53      }
    54  
    55      /* update the length */
    56      slv.Len = ret
    57      runtime.KeepAlive(s)
    58      return 0
    59  }
    60
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