gen/gui_factory_gen.c

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/* THIS IS A GENERATED FILE, DO NOT EDIT!!! */
#include <assert.h>
#include "gui_factory_friend_gen.h"

typedef struct gui_factory_private_st_ {
    const gui_factory_vtable_st *vtable;
} gui_factory_private_st;

static void
gui_factory_delete_internal (gui_factory_handle gui_factory_h, 
    bool free_gui_factory_h)
{
    if (NULL == gui_factory_h) {
        return;
    }

    if (NULL != gui_factory_h->private_h) {
        free(gui_factory_h->private_h);
        gui_factory_h->private_h = NULL;
    }

    if (free_gui_factory_h) {
        free(gui_factory_h);
    }
}

void
gui_factory_friend_delete (gui_factory_handle gui_factory_h)
{
    gui_factory_delete_internal(gui_factory_h, false);
}

button_handle
gui_factory_create_button (gui_factory_handle gui_factory_h)
{
    assert((NULL != gui_factory_h) &&
           (NULL != gui_factory_h->private_h) &&
           (NULL != gui_factory_h->private_h->vtable) &&
           (NULL != gui_factory_h->private_h->vtable->create_button_fn));

    return (gui_factory_h->private_h->vtable->create_button_fn(gui_factory_h));
}

void
gui_factory_delete (gui_factory_handle gui_factory_h)
{
    assert((NULL != gui_factory_h) &&
           (NULL != gui_factory_h->private_h) &&
           (NULL != gui_factory_h->private_h->vtable) &&
           (NULL != gui_factory_h->private_h->vtable->delete_fn));

    return (gui_factory_h->private_h->vtable->delete_fn(gui_factory_h));
}

static const gui_factory_vtable_st gui_factory_vtable = {
    NULL,
    NULL
};

static bool
gui_factory_inherit_vtable (const gui_factory_vtable_st *parent_vtable,
    gui_factory_vtable_st *child_vtable,
    bool do_null_check)
{
    if ((NULL == parent_vtable) || (NULL == child_vtable)) {
        return (false);
    }

    if (NULL == child_vtable->create_button_fn) {
        child_vtable->create_button_fn = parent_vtable->create_button_fn;
        if (do_null_check && (NULL == child_vtable->create_button_fn)) {
            return (false);
        }
    }

    if (NULL == child_vtable->delete_fn) {
        child_vtable->delete_fn = parent_vtable->delete_fn;
        if (do_null_check && (NULL == child_vtable->delete_fn)) {
            return (false);
        }
    }

    return (true);
}

bool
gui_factory_set_vtable (gui_factory_handle gui_factory_h, 
    gui_factory_vtable_st *vtable)
{
    bool rc;

    if (((NULL == gui_factory_h) || (NULL == vtable) ||
         (NULL == gui_factory_h->private_h))) {
        return (false);
    }
    
    rc = gui_factory_inherit_vtable(&gui_factory_vtable, vtable, true);

    if (rc) {
        gui_factory_h->private_h->vtable = vtable;
    }

    return (rc);
}

bool
gui_factory_init (gui_factory_handle gui_factory_h)
{
    if (NULL == gui_factory_h) {
        return (false);
    }

    gui_factory_h->private_h = calloc(1, sizeof(*gui_factory_h->private_h));
    if (NULL == gui_factory_h->private_h) {
        goto err_exit;
    }

    gui_factory_h->private_h->vtable = NULL;

    return (true);

err_exit:

    if (NULL != gui_factory_h->private_h) {
        free(gui_factory_h->private_h);
        gui_factory_h->private_h = NULL;
    }

    return (false);
}