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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { PartialReadError } from "../io/buf_reader.ts";import type { Reader } from "../types.d.ts";
export interface TarInfo {  fileMode?: number;  mtime?: number;  uid?: number;  gid?: number;  owner?: string;  group?: string;  type?: string;}
export interface TarOptions extends TarInfo {  /**   * append file   */  filePath?: string;
  /**   * append any arbitrary content   */  reader?: Reader;
  /**   * size of the content to be appended   */  contentSize?: number;}
export interface TarMeta extends TarInfo {  fileName: string;  fileSize?: number;}
export enum FileTypes {  "file" = 0,  "link" = 1,  "symlink" = 2,  "character-device" = 3,  "block-device" = 4,  "directory" = 5,  "fifo" = 6,  "contiguous-file" = 7,}
export const recordSize = 512;
/*struct posix_header {           // byte offset  char name[100];               //   0  char mode[8];                 // 100  char uid[8];                  // 108  char gid[8];                  // 116  char size[12];                // 124  char mtime[12];               // 136  char chksum[8];               // 148  char typeflag;                // 156  char linkname[100];           // 157  char magic[6];                // 257  char version[2];              // 263  char uname[32];               // 265  char gname[32];               // 297  char devmajor[8];             // 329  char devminor[8];             // 337  char prefix[155];             // 345                                // 500};*/
export const ustarStructure: Array<{ field: string; length: number }> = [  {    field: "fileName",    length: 100,  },  {    field: "fileMode",    length: 8,  },  {    field: "uid",    length: 8,  },  {    field: "gid",    length: 8,  },  {    field: "fileSize",    length: 12,  },  {    field: "mtime",    length: 12,  },  {    field: "checksum",    length: 8,  },  {    field: "type",    length: 1,  },  {    field: "linkName",    length: 100,  },  {    field: "ustar",    length: 8,  },  {    field: "owner",    length: 32,  },  {    field: "group",    length: 32,  },  {    field: "majorNumber",    length: 8,  },  {    field: "minorNumber",    length: 8,  },  {    field: "fileNamePrefix",    length: 155,  },  {    field: "padding",    length: 12,  },];
export async function readBlock(  reader: Reader,  p: Uint8Array,): Promise<number | null> {  let bytesRead = 0;  while (bytesRead < p.length) {    const rr = await reader.read(p.subarray(bytesRead));    if (rr === null) {      if (bytesRead === 0) {        return null;      } else {        throw new PartialReadError();      }    }    bytesRead += rr;  }  return bytesRead;}