Simple wc(1) in D

wc.d

// $ dmd wc.d
// $ cat /usr/share/dict/words | ./wc
// 235886  235886  2493109

import std.stdio;

void main()
{
  int lines = 0;
  int words = 0;
  int chars = 0;
  bool wasSpace = true;

  auto buffer = new char[4096];

  while (!stdin.eof()) {
    auto inp = stdin.rawRead(buffer);  
    foreach (i; 0 .. inp.length) {
      switch (inp[i]) {
        case '\t':
        case ' ':
          wasSpace = true;
          chars++;
          break;
        case '\r':
        case '\n':
          wasSpace = true;
          lines++;
          chars++;
          break;
        default:
          chars++;
          if (wasSpace) {
            words++;
          }
          wasSpace = false;
      }
    }
  }

  writeln(lines, "\t", words, "\t", chars);
}