github.com/goplus/llgo@v0.8.3/xtool/ar/common.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 ar
    18  
    19  import (
    20  	"errors"
    21  	"time"
    22  )
    23  
    24  var (
    25  	errInvalidHeader = errors.New("ar: invalid header")
    26  	errWriteTooLong  = errors.New("ar: write too long")
    27  )
    28  
    29  const (
    30  	globalHeader    = "!<arch>\n"
    31  	globalHeaderLen = len(globalHeader)
    32  	headerByteSize  = 60
    33  )
    34  
    35  type recHeader struct {
    36  	name    [16]byte
    37  	modTime [12]byte
    38  	uid     [6]byte
    39  	gid     [6]byte
    40  	mode    [8]byte
    41  	size    [10]byte
    42  	eol     [2]byte
    43  }
    44  
    45  type Header struct {
    46  	Name    string
    47  	ModTime time.Time
    48  	Uid     int
    49  	Gid     int
    50  	Mode    int64
    51  	Size    int64
    52  }
    53  
    54  type slicer []byte
    55  
    56  func (sp *slicer) next(n int) (b []byte) {
    57  	s := *sp
    58  	b, *sp = s[0:n], s[n:]
    59  	return
    60  }