struct resbuf

The following result-buffer structure, resbuf, is defined in conjunction with a union, ads_u_val, that accommodates the various AutoCAD and ObjectARX data types, as follows:

union ads_u_val { 
    ads_real rreal; 
    ads_real rpoint[3]; 
    short rint; // Must be declared short, not int.  
    char *rstring; 
    long rlname[2]; 
    long rlong; 
    struct ads_binary rbinary; 
}; 
struct resbuf { 
    struct resbuf *rbnext; // Linked list pointer  
    short restype; 
    union ads_u_val resval; 
}; 

Note: The long integer field resval.rlong is like the binary data field resval.rbinary; both hold extended entity data.

The following figure shows the schematic form of a result-buffer list: