ceph/src/boost/libs/spirit/example/lex/word_count_functor.flex

   1 %{
   2 //  Copyright (c) 2001-2009 Hartmut Kaiser
   3 //
   4 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   5 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #include <boost/timer.hpp>
   8 #if defined(_WIN32)
   9     #include <io.h>
  10 #endif
  11     #define ID_WORD 1000
  12     #define ID_EOL  1001
  13     #define ID_CHAR 1002
  14 %}
  15
  16 %%
  17 [^ \t\n]+  { return ID_WORD; }
  18 \n         { return ID_EOL; }
  19 .          { return ID_CHAR; }
  20 %%
  21
  22 bool count(int tok, int* c, int* w, int* l)
  23 {
  24     switch (tok) {
  25     case ID_WORD: ++*w; *c += yyleng; break;
  26     case ID_EOL:  ++*l; ++*c; break;
  27     case ID_CHAR: ++*c; break;
  28     default:
  29         return false;
  30     }
  31     return true;
  32 }
  33
  34 int main(int argc, char* argv[])
  35 {
  36     int tok = EOF;
  37     int c = 0, w = 0, l = 0;
  38     yyin = fopen(1 == argc ? "word_count.input" : argv[1], "r");
  39     if (NULL == yyin) {
  40         fprintf(stderr, "Couldn't open input file!\n");
  41         exit(-1);
  42     }
  43
  44     boost::timer tim;
  45     do {
  46         tok = yylex();
  47         if (!count(tok, &c, &w, &l))
  48             break;
  49     } while (EOF != tok);
  50     printf("lines: %d, words: %d, characters: %d\n", l, w, c);
  51     fclose(yyin);
  52     return 0;
  53 }
  54
  55 extern "C" int yywrap()
  56 {
  57     return 1;
  58 }
  59