The mi_var_copy() function
The mi_var_copy() function creates a copy of a varying-length structure.
Syntax
mi_lvarchar *mi_var_copy(varlen_ptr)
mi_lvarchar *varlen_ptr;- varlen_ptr
- A pointer to the varying-length structure to copy.
| Valid in client LIBMI application? | Valid in user-defined routine? |
|---|---|
| Yes | Yes |
Usage
The mi_var_copy() function copies the varying-length structure that varlen_ptr references and returns a pointer to the newly allocated copy. The function is a constructor function for a varying-length structure. It creates a varying-length structure with a new data portion whose size is the same as the original varying-length structure (which varlen_ptr references).
Server only: The mi_var_copy() function
allocates a new varying-length structure with the current memory duration.
Use
the mi_var_free() function to free this structure
when it is no longer needed.
Restriction: Do not use the DataBlade® API memory-management
functions such as the mi_alloc() function to allocate
a varying-length structure.
Return values
- An mi_lvarchar pointer
- A pointer to a newly allocated varying-length structure.
- NULL
- The function was not successful.