The mi_get_bytes() function
The mi_get_bytes() function copies the given number of bytes, converting any difference in alignment or byte order on the client computer to that of the server computer.
Syntax
mi_unsigned_char1 *mi_get_bytes(data_ptr, val_ptr, nbytes)
mi_unsigned_char1 *data_ptr;
char *val_ptr;
mi_integer nbytes;- data_ptr
- A pointer to the buffer from which to copy bytes of data.
- val_ptr
- A pointer to the buffer to which to copy bytes of data.
- nbytes
- The number of bytes to copy.
| Valid in client LIBMI application? | Valid in user-defined routine? |
|---|---|
| No | Yes |
Usage
The mi_get_bytes() function copies nbytes bytes of data from the user-defined buffer that data_ptr references to the buffer that val_ptr references. Upon completion, mi_get_bytes() returns the address of the next position from which data can be copied from the data_ptr buffer. The function returns the data_ptr address advanced by nbytes bytes, ready for a subsequent copy. In other words, if nbytes is the length of the value that val_ptr identifies, the returned address is nbytes bytes advanced from the original buffer address in data_ptr.
The mi_get_bytes() function is useful in a receive support function of an opaque data type that contains byte data. Use this function to receive untyped data (such as void *) within an opaque-type internal structure from a client application (which possibly has unaligned data buffers).
For more information about the use of mi_get_bytes() in a receive support function, see the Informix® DataBlade® API Programmer's Guide.
Return values
- An mi_unsigned_char1 pointer
- The new address in the data_ptr data buffer.
- NULL
- The function was not successful.