ToC path:

mco_uda_get

Return the field value.

Prototype

 
    MCO_RET mco_uda_get(	/*IN*/ const mco_uda_object_handle_p obj,
                /*IN*/ unsigned short field_no, 
                /*IN*/ unsigned short index, 
                /*OUT*/ mco_uda_value_t * val );

Arguments

obj	The object handle
field_no	The field number (must be between 0 and `struct_info.field_count` - 1)
index	The element index for vector or array fields
val	The address of a `mco_uda_value_t` variable to receive the data

Description

Returns the field value. (See description of mco_uda_value_t for details on how to prepare parameter val for receiving data of different types.)

Return Codes

MCO_S_OK	Field data successfully returned
MCO_S_NOTFOUND	Invalid `fieldno` - field not found in this class or struct

Example

For examples demonstrating how to retrieve database field values of various types see the description of mco_uda_value_t.

 
    Application snippet:
        
     
    int main(int argc, char* argv[])
    {
        MCO_RET rc;
        mco_uda_object_handle_t rec;
        mco_uda_value_t val;
        unsigned short field_1 = 1;
         
        /* Get simple scalar values */
        val.type = MCO_DD_UINT4; /* Set field's type */
        rc = mco_uda_get(&rec, field1, 0, &value);
        
        printf("\n\tGet Record.u4                  : %d", val.v.u4);
        ...
    }

Files

Header file:

mcouda.h

Source file:

mcouda.c

Library:

libmcouda.a