The mi_get_double_precision() function
The mi_get_double_precision() function copies an mi_double_precision (FLOAT) value, converting any difference in alignment or byte order on the client computer to that of the server computer.
Syntax
mi_unsigned_char1 *mi_get_double_precision(data_ptr, dbl_ptr)
mi_unsigned_char1 *data_ptr;
mi_double_precision *dbl_ptr;- data_ptr
- A pointer to the buffer from which to copy the mi_double_precision value.
- dbl_ptr
- A pointer to the buffer to which to copy the mi_double_precision value.
| Valid in client LIBMI application? | Valid in user-defined routine? |
|---|---|
| No | Yes |
Usage
The mi_get_double_precision() function copies a value from the user-defined buffer that data_ptr references into the buffer that dbl_ptr references. Upon completion, mi_get_double_precision() 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 n bytes, ready for a subsequent copy. In other words, if n is the length of the value that dbl_ptr indicates, the returned address is advanced n bytes from the original buffer address in data_ptr.
The mi_get_double_precision() function is useful in a receive support function of an opaque data type that contains an mi_double_precision value. Use this function to receive an mi_double_precision field of an opaque-type internal structure from a client application (which possibly has unaligned data buffers).
For more information about the use of mi_get_double_precision() 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.