tools/bcp/path_operations.cpp

   1 /*
   2  *
   3  * Copyright (c) 2003 Dr John Maddock
   4  * Use, modification and distribution is subject to the
   5  * Boost Software License, Version 1.0. (See accompanying file
   6  * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7  *
   8  * This file implements path comparisons
   9  */
  10
  11
  12 #include "bcp_imp.hpp"
  13 #include <cctype>
  14
  15 #ifdef BOOST_NO_STDC_NAMESPACE
  16 namespace std{
  17    using ::tolower;
  18 }
  19 #endif
  20
  21
  22 int compare_paths(const fs::path& a, const fs::path& b)
  23 {
  24    const std::string& as = a.string();
  25    const std::string& bs = b.string();
  26    std::string::const_iterator i, j, k, l;
  27    i = as.begin();
  28    j = as.end();
  29    k = bs.begin();
  30    l = bs.end();
  31    while(i != j)
  32    {
  33       if(k == l)
  34          return -1;
  35       int r = std::tolower(*i) - std::tolower(*k);
  36       if(r) return r;
  37       ++i;
  38       ++k;
  39    }
  40    return (k == l) ? 0 : 1;
  41 }