text: /* uuencode.c - uuencode / base64 encode
   *
   * Copyright 2013 Erich Plondke <toybox@erich.wreck.org>
   *
   * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/uuencode.html
  
  USE_UUENCODE(NEWTOY(uuencode, "<1>2m", TOYFLAG_USR|TOYFLAG_BIN))
  
  config UUENCODE
    bool "uuencode"
    default y 
    help
      usage: uuencode [-m] [file] encode-filename
  
      Uuencode stdin (or file) to stdout, with encode-filename in the output.
  
      -m	Base64
  */
  
  #define FOR_uuencode
  #include "toys.h"
  
  void uuencode_main(void)
  {
    char *name = toys.optargs[toys.optc-1], buf[(76/4)*3];
  
    int i, m = FLAG(m), fd = 0;
  
    if (toys.optc > 1) fd = xopenro(toys.optargs[0]);
  
    base64_init(toybuf);
  
    xprintf("begin%s 744 %s\n", m ? "-base64" : "", name);
    for (;;) {
      char *in;
  
      if (!(i = xread(fd, buf, m ? sizeof(buf) : 45))) break;
  
      if (!m) xputc(i+32);
      in = buf;
  
      for (in = buf; in-buf < i; ) {
        int j, x, bytes = i - (in-buf);
  
        if (bytes > 3) bytes = 3;
  
        for (j = x = 0; j<4; j++) {
          int out;
  
          if (j < bytes) x |= (*(in++) & 0x0ff) << (8*(2-j));
          out = (x>>((3-j)*6)) & 0x3f;
          xputc(m ? (j > bytes ? '=' : toybuf[out]) : (out ? out + 0x20 : 0x60));
        } 
      }
      xputc('\n');
    }
    xputs(m ? "====" : "end");
  }
  