#include <Pt/Db/Blob.h>
Copy-on-write binary large object. More...
Public Member Functions | |
| Blob () | |
| Creates an empty blob. | |
| Blob (const char *data, std::size_t len) | |
| Copies len bytes from data. | |
| Blob (IBlob *b) | |
| Takes ownership of the implementation b. | |
| void | assign (const char *data, std::size_t len) |
| Replaces the bytes with len bytes from data. | |
| bool | operator== (const Blob &b) const |
| Returns true if both blobs contain the same data. | |
| bool | operator!= (const Blob &b) const |
| Returns true if the blobs do not contain the same data. | |
| const char * | data () const |
| Returns a pointer to the data, or 0 if empty. | |
| std::size_t | size () const |
| Returns the size of the data. | |
Blob holds binary column data as a shared, copy-on-write value. The default constructor is empty. The data constructor copies len bytes from data. The IBlob constructor takes ownership of a custom implementation.
assign() replaces the bytes and copies on write when the value is shared. data() returns the bytes or 0 when empty. size() is the length. Equality compares the bytes.