Declared in file: hzTextproc.h
Defined in file : hzTypes.cpp

Function Logic:

Function body:

bool IsPosint (uint64_t& nVal)const char* tok, 
{
   _hzfunc("IsPosint(uint64)") ;
   const char* i ;         //  Input string iterator
   uint64_t    val ;       //  Value aggregator
   uint32_t    count ;     //  Length check
   nVal = 0;
   i = tok ;
   if (!i || !i[0])
       return false ;
   //  cope with + and any leading whitespace
   for (; IsWhite(*i) ; i++) ;
   //  Reject on minus sign
   if (*i == CHAR_MINUS)
       return false ;
   //  Ignore plus sign
   if (*i == ''+'')
       for (i++ ; IsWhite(*i) ; i++) ;
   //  cope with spaces between sign and digits
   for (; IsWhite(*i) ; i++) ;
   val = 0;
   for (count = 0; count < 21&&IsDigit(*i) ; count++, i++)
   {
       val *= 10;
       val += (*i - CHAR_0) ;
   }
   //  Check length limit
   if (!count || count > 20)
       return false ;
   nVal = val ;
   return true ;
}