xpcom/string/src/nsTStringComparator.cpp
author Benjamin Smedberg <benjamin@smedbergs.us>
Tue, 27 May 2008 13:51:53 -0400
changeset 15145 f68cd87e0d10de19925227af59a343d7787167d3
parent 1 9b2a99adc05e53cd4010de512f50118594756650
child 19418 7e95620116b18296ed93fea3e0d53c0428a9d78a
permissions -rw-r--r--
Back out JS-as-C++, because it's a suspect in the Linux performance regression.

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
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 *   Darin Fisher <darin@meer.net>
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NS_COM int NS_FASTCALL
Compare( const nsTSubstring_CharT::base_string_type& lhs, const nsTSubstring_CharT::base_string_type& rhs, const nsTStringComparator_CharT& comp )
  {
    typedef nsTAString_CharT::size_type size_type;

    if ( &lhs == &rhs )
      return 0;

    nsTAString_CharT::const_iterator leftIter, rightIter;
    lhs.BeginReading(leftIter);
    rhs.BeginReading(rightIter);

    size_type lLength = leftIter.size_forward();
    size_type rLength = rightIter.size_forward();
    size_type lengthToCompare = NS_MIN(lLength, rLength);

    int result;
    if ( (result = comp(leftIter.get(), rightIter.get(), lengthToCompare)) == 0 )
      {
        if ( lLength < rLength )
          result = -1;
        else if ( rLength < lLength )
          result = 1;
        else
          result = 0;
      }

    return result;
  }

int
nsTDefaultStringComparator_CharT::operator()( const char_type* lhs, const char_type* rhs, PRUint32 aLength ) const
  {
    return nsCharTraits<CharT>::compare(lhs, rhs, aLength);
  }

int
nsTDefaultStringComparator_CharT::operator()( char_type lhs, char_type rhs) const
  {
    return lhs - rhs;
  }