Wrapping of function in the same file

问题

I need your suggestion to wrap my existing function.

I am from testing team I need to write unit test cases, so I don't want to depend on original definition so trying to write my own definiton.

Following is the source code which should not be changed.

source.c:

#include <stdio.h>
const char *getObjectName (int *anObject);

void func()
{
    int *p;
    getObjectName(p);
}

const char *getObjectName (int *anObject)
{
    printf("i am in original\n");
}

From the above code I want to wrap getObjectName() function so that I can give my own definition.

I have googled a lot and tried following methods but didn't work out:

• Method 1. using ld --wrap method
• Method 2. using -DINTERCEPT
• Method 3. using function pointer

I cannot use above 3 methods because calling function and called function are in same file.

So please suggest me any other methods to write my own defintion for getObjectName().

来源：https://stackoverflow.com/questions/43203723/wrapping-of-function-in-the-same-file