StringCompare.h

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#ifndef _utl_StringCompare_h_
#define _utl_StringCompare_h_

#include <string>
#include <algorithm>
#include <cctype>


namespace utl {

  class CharEqualNoCase {
  public:
    bool operator()(const char a, const char b) const
    { return std::tolower(a) == std::tolower(b); }
  };


  template<class Predicate>
  inline
  bool
  StringEquivalent(const std::string& a, const std::string& b, Predicate p)
  {
    return a.size() == b.size() && std::equal(a.begin(), a.end(), b.begin(), p);
  }


  inline
  bool
  StringEquivalent(const std::string& a, const std::string& b)
  {
    return StringEquivalent(a, b, CharEqualNoCase());
  }


  template<class Predicate>
  inline
  bool
  ContainsSubstring(const std::string& a, const std::string& b, Predicate p)
  {
    return std::search(a.begin(), a.end(), b.begin(), b.end(), p) != a.end();
  }


  inline
  bool
  ContainsSubstring(const std::string& a, const std::string& b)
  {
    return ContainsSubstring(a, b, std::equal_to<char>());
  }


  inline
  bool
  ContainsSubstringEquivalent(const std::string& a, const std::string& b)
  {
    return ContainsSubstring(a, b, CharEqualNoCase());
  }

}


#endif