/* crc32.js (C) 2014-present SheetJS -- http://sheetjs.com */
/* eslint-env node */
/* vim: set ts=2 ft=javascript: */
/*jshint node:true */
///
/* node type definition is missing writable stream _writev */
interface Chunk { chunk: any; encoding: string; }
type CBType = () => void;
import X = require("crc-32");
import 'exit-on-epipe';
import fs = require('fs');
import stream = require('stream');
import { sprintf } from "printj";
const help = (): number => {
[
"usage: crc32 [options] [filename]",
"",
"Options:",
" -h, --help output usage information",
" -V, --version output the version number",
" -S, --seed= use integer seed as starting value (rolling CRC)",
" -H, --hex-seed= use hex seed as starting value (rolling CRC)",
" -d, --signed print result with format `%d` (default)",
" -u, --unsigned print result with format `%u`",
" -x, --hex print result with format `%0.8x`",
" -X, --HEX print result with format `%0.8X`",
" -F, --format= use specified printf format",
"",
"Set filename = '-' or pipe data into crc32 to read from stdin",
"Default output mode is signed (-d)",
""
].forEach(function(l) { console.log(l); });
return 0;
};
const version = (): number => { console.log(X.version); return 0; };
const die = (msg: string, ec?: number): void => { console.error(msg); process.exit(ec || 0); };
const args/*:Array*/ = process.argv.slice(2);
let filename/*:string*/ = "";
let fmt/*:string*/ = "";
let seed = 0, r = 10;
for(let i = 0; i < args.length; ++i) {
const arg = args[i];
if(arg.charCodeAt(0) !== 45) { if(filename === "") filename = arg; continue; }
const m = arg.indexOf("=") === -1 ? arg : arg.substr(0, arg.indexOf("="));
switch(m) {
case "-": filename = "-"; break;
case "--help": case "-h": process.exit(help()); break;
case "--version": case "-V": process.exit(version()); break;
case "--signed": case "-d": fmt = "%d"; break;
case "--unsigned": case "-u": fmt = "%u"; break;
case "--hex": case "-x": fmt = "%0.8x"; break;
case "--HEX": case "-X": fmt = "%0.8X"; break;
case "--format": case "-F":
fmt = ((m!==arg) ? arg.substr(m.length+1) : args[++i])||""; break;
case "--hex-seed": case "-H": r = 16;
/* falls through */
case "--seed": case "-S":
seed=parseInt((m!==arg) ? arg.substr(m.length+1) : args[++i], r)||0; break;
default: die("crc32: unrecognized option `" + arg + "'", 22);
}
}
if(!process.stdin.isTTY) filename = filename || "-";
if(filename.length===0) die("crc32: must specify a filename ('-' for stdin)",1);
let crc32 = seed;
// $FlowIgnore -- Writable is callable but type sig disagrees
const writable = new stream.Writable();
writable._write = (chunk: any, e: string, cb: CBType) => { crc32 = X.buf(chunk, crc32); cb(); };
(writable)._writev = (chunks: Chunk[], cb: CBType) => {
chunks.forEach(function(c) { crc32 = X.buf(c.chunk, crc32);}); cb();
};
writable.on('finish', () => {
console.log(fmt === "" ? crc32 : sprintf(fmt, crc32));
});
if(filename === "-") process.stdin.pipe(writable);
else if(fs.existsSync(filename)) fs.createReadStream(filename).pipe(writable);
else die("crc32: " + filename + ": No such file or directory", 2);