Conditional, content based truncation. If the supplied patern exists in the string, the new string will be everything beyond but not including the first instance of the patern. If the pattern is empty or does not exist in the string, the string content will be unchanged.

Declared in file: hzString.h
Defined in file : hzString.cpp

Function Logic:

Function body:

hzString& hzString::TruncateBeyond (const char* patern)
{
   //  Category: Text Processing
   //  
   //  Conditional, content based truncation. If the supplied patern exists in the string, the new string will be everything beyond but not including the first
   //  instance of the patern. If the pattern is empty or does not exist in the string, the string content will be unchanged.
   //  
   //  Arguments: 1) pattern The pattern at which the string will be truncated.
   //  Returns: Reference to this string in all cases
   _hzfunc("hzString::TruncateBeyond") ;
   _strItem*       thisCtl ;       //  This string's control area
   _strItem*       destCtl ;       //  New control area
   char*           i ;             //  Pointer into old string data
   char*           j ;             //  Pointer into new string data
   uint32_t        destAddr ;      //  New string address if required
   uint32_t        newLen ;        //  New string length
   //  If no pattern supplied, do nothing
   if (!patern || !patern[0])
       return *this ;
   //  If NULL return
   if (!m_addr)
       return *this ;
   //  Test if change required
   thisCtl = _strXlate(m_addr) ;
   i = strstr((char*) thisCtl->_data(), patern) ;
   if (!i)
       return *this ;
   //  Allocate new space
   newLen = i - thisCtl->_data() ;
   destAddr = _strAlloc(newLen) ;
   destCtl = _strXlate(destAddr) ;
   destCtl->_setSize(newLen) ;
   destCtl->m_copy = 1;
   i += strlen(patern) ;
   for (j = destCtl->_data() ; *i ; *j++ = *i++) ;
   *j = 0;
   //  Tidy up
   if (thisCtl->m_copy && thisCtl->m_copy < 50)
   {
       if (!_hzGlobal_MT)
       {
           thisCtl->m_copy-- ;
           if (!thisCtl->m_copy)
               _strFree(m_addr, thisCtl->_getSize()) ;
       }
       else
       {
           if (__sync_add_and_fetch(&(thisCtl->m_copy), -1)== 0)
               _strFree(m_addr, thisCtl->_getSize()) ;
       }
   }
   m_addr = destAddr ;
   return *this ;
}