IgorZ

Hi All!

how about this
code does take in account for characters you want to skip,
but it does not check for case sensivivity

pure c++, not using any rtl
avoiding checking for special case if string is "ABA" for example

TCHAR ptszSkip[] = {' ', ',', '!', '-'};
bool IsPalindrome(TCHAR* ptsz)
{
   bool bRet = false;
   if(NULL != ptsz)
   {
      TCHAR* ptszEnd = ptsz;
      while(*ptszEnd != 0)  //get end pointer
      {
         ++ptszEnd;
      }
      --ptszEnd;
      bRet = true;

      while(ptsz < ptszEnd)
      {
         bool bDoCheck = true;
         for(size_t i = 0; i < sizeof(ptszSkip)/sizeof(ptszSkip[0]); i++)
         { /*check for skiped chars*/
            if(*ptsz == ptszSkip[i])
            {
               ++ptsz;
               bDoCheck = false;
               break;
            }
            if(*ptszEnd == ptszSkip[i])
            {
               --ptszEnd;
               bDoCheck = false;
               break;
            }
         }

         if(bDoCheck)
         {
            if(*ptsz != *ptszEnd) //as soon as find first not equal chars ,  return false
            {
               bRet = false; 
               break;
            }
            ++ptsz;
            --ptszEnd;
         }
      }
   }
   return bRet;
}