Re: [9fans] c code differencing

[Comeau At9Fans <comeauat9fans@gmail.com>]

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On Wed, Aug 31, 2011 at 9:01 AM, Steve Simon <steve@quintile.net> wrote:

> Anyone have any pointers to a diff for C code.
>
> I have two libraries, A and B.
>
> B is and expanded and modified version of A and I have been
> asked to extract A from B to build two libraries one
> built on top of the other.
>

I'm unclear what you're seeking.  For instance, given this:

// original/a.c
// ...mumbly...
void foo()
{
    int i;

    i = x();
    i = y()
}

and

// new/a.c
// ...mumbly...
void foo()
{
    int i;

    i = y();
    i = z();
}

the obvious line of difference is the removal of i = x() and the addition of
i = z();  So what will the diff'd version look like, conceptually would it
be this? :

// diffd/a.c
// ...mumbly...
// ...possible more mumbly...
void foo()
{
    int i;

    diffd_old();
    i = y();
    diffd_new();
}

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