xpcom/string/nsTStringComparator.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 int NS_FASTCALL
   8 Compare(const nsTSubstring_CharT::base_string_type& aLhs,
   9         const nsTSubstring_CharT::base_string_type& aRhs,
  10         const nsTStringComparator_CharT& comp)
  11 {
  12   typedef nsTSubstring_CharT::size_type size_type;
  13
  14   if (&aLhs == &aRhs) {
  15     return 0;
  16   }
  17
  18   nsTSubstring_CharT::const_iterator leftIter, rightIter;
  19   aLhs.BeginReading(leftIter);
  20   aRhs.BeginReading(rightIter);
  21
  22   size_type lLength = leftIter.size_forward();
  23   size_type rLength = rightIter.size_forward();
  24   size_type lengthToCompare = XPCOM_MIN(lLength, rLength);
  25
  26   int result;
  27   if ((result = comp(leftIter.get(), rightIter.get(),
  28                      lengthToCompare, lengthToCompare)) == 0) {
  29     if (lLength < rLength) {
  30       result = -1;
  31     } else if (rLength < lLength) {
  32       result = 1;
  33     } else {
  34       result = 0;
  35     }
  36   }
  37
  38   return result;
  39 }
  40
  41 int
  42 nsTDefaultStringComparator_CharT::operator()(const char_type* aLhs,
  43                                              const char_type* aRhs,
  44                                              uint32_t aLLength,
  45                                              uint32_t aRLength) const
  46 {
  47   return
  48     aLLength == aRLength ? nsCharTraits<CharT>::compare(aLhs, aRhs, aLLength) :
  49                             (aLLength > aRLength) ? 1 : -1;
  50 }