Determine if supplied char string (arg 2) amounts to a hexadecimal number. This may optionally be preceeded by # or 0x. If the string is a hexadecimal number true is returned and the supplied uint32_t reference (arg 1) is set to the value.

Declared and defined in file: hzTokens.cpp

Function Logic:

Function body:

bool IsHexValue (uint32_t& nLen)const char* pStr, 
{
   //  Category: Text Processing
   //  
   //  Determine if supplied char string (arg 2) amounts to a hexadecimal number. This may optionally be preceeded by # or 0x. If the string is
   //  a hexadecimal number true is returned and the supplied uint32_t reference (arg 1) is set to the value.
   //  
   //  Arguments: 1) nLen Set by the operation as the length of the hexadecimal number if found
   //     2) pStr The pointer into the test string
   //  
   //  Returns: True If the supplied cstr amounts to a hexidecimal number
   //     False Otherwise
   const char* i = pStr ;      //  Input string iterator
   uint32_t    nBytes = 0;
   uint32_t    nHex = 0;
   nLen = 0;
   if (!i)
       return false ;
   if (*i == CHAR_HASH && IsHex(i[1]))
       { nBytes++ ; i++ ; }
   if (*i == ''0''&&i[1]== ''x'')
       { nBytes += 2; i += 2; }
   for (; IsHex(*i) ; nHex++, nBytes++, i++) ;
   if (!nHex)
       return false ;
   nLen = nBytes ;
   return true ;
}