The mi_fp_argtype() function
The mi_fp_argtype() accessor function obtains the type identifier for the data type of an argument of a user-defined routine from the argument's associated MI_FPARAM structure.
Syntax
MI_TYPEID *mi_fp_argtype(fparam_ptr, arg_pos)
MI_FPARAM *fparam_ptr;
mi_integer arg_pos;- fparam_ptr
- A pointer to the associated MI_FPARAM structure.
- arg_pos
- The index position into the argument-type array for the argument whose type identifier you want.
| Valid in client LIBMI application? | Valid in user-defined routine? |
|---|---|
| Yes | Yes |
Usage
The mi_fp_argtype() function
obtains the type identifier (MI_TYPEID) of the routine argument at
position arg_pos from the MI_FPARAM structure that fparam_ptr references.
The type identifier is an integer value that indicates a particular
data type. The MI_FPARAM structure stores information about
the type identifiers of routine arguments in the zero-based argument-type
array. To obtain information about the nth argument, use an arg_pos value
of n
-1. For example, the following call to mi_fp_argtype() obtains
the type identifier for the third argument of the my_func() UDR,
with which fparam1 is associated:mi_integer my_func(..., fparam1)
...
MI_FPARAM *fparam1;
{
MI_TYPEID *arg_type;
...
arg_type = mi_fp_argtype(fparam1, 2);For more information about argument information in an MI_FPARAM structure, see the Informix® DataBlade® API Programmer's Guide.
Return values
- An MI_TYPEID pointer
- A pointer to the type identifier of the argument at position arg_pos.
- NULL
- The function was not successful.