function "string_ptr_ptr()" problem

[sakarab]

The code is not like your example. It is rather like this:

void *str_ptr = new ds_string();
void *str_ptr_ptr = &str_ptr;
ds_string **data = reinterpret_cast<ds_string **>(str_ptr_ptr);

See the construct, copy_construct and destroy member functions.

[ninyjun]

THANKS!
I think,when field's FieldDataType  is defined ftString (fixed length),you put ds_string* into cRawBuffer ? 
you know ,the fixed ftstring can be taked for  char[n], maybe you can put actual data into
cRawBuffer.

[sakarab]

When the database field type is "string" (fixed length or not), the field data type in the dataset is "ftString" and the cRawBuffer contains a "ds_string *".
For a fixed length string having a char array in the buffer is a solution but it makes the code a bit more complicated (you have to cater for fixed and variable strings and track the used space in the char[]) and you must allocate space which is not always used.