src/wordlist.cc

   1 /**
   2  * cwc - a crossword compiler. Copyright 1999 Lars Christensen
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  17  * 02111-1307, USA.
  18  **/
  19
  20 #include <fstream>
  21 #include "wordlist.hh"
  22
  23 wordlist::wordlist() {
  24   allalpha = 0;
  25 }
  26
  27 #define chunksize 8192
  28
  29 bool wordlist::wordok(const string &fn) {
  30   int n = fn.length();
  31   for (int i=0;i<n;i++)
  32     if (!isalpha(fn[i]))
  33       return false;
  34   return true;
  35 }
  36
  37 void wordlist::load(const string &fn) {
  38   ifstream f(fn.c_str());
  39   if (!f.is_open()) throw error("Failed to open file");
  40
  41   widx.clear();
  42
  43   symbol *chunk = new symbol[chunksize];
  44   int chunkused = 0;
  45
  46   string ln;
  47   while (!f.eof()) {
  48     getline(f, ln);
  49     int wlen = ln.length();
  50     if (wlen == 0)
  51       continue;
  52     if (!wordok(ln))
  53       continue;
  54
  55     if (chunksize - chunkused < wlen+1) {
  56       chunk = new symbol[chunksize];
  57       chunkused = 0;
  58     }
  59
  60     symbol *addr = chunk + chunkused;
  61     for (int i=0; i<wlen; i++) {
  62       symbol s = symbol(tolower(ln[i]));
  63       chunk[chunkused++] = s;
  64       allalpha |= s.getsymbolset();
  65     }
  66     chunk[chunkused++] = symbol::outside;
  67
  68     widx.push_back(addr);
  69   }
  70 }
  71