E(P)API: environ (Plugin) API.

plugins.c

/*
 * plugins.c
 * 
 * Copyright 2020 Alvarito050506 <donfrutosgomez@gmail.com>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 * 
 * 
 */

#include <gtk/gtk.h>
#include <plugins.h>
#include <stdlib.h>

struct eapi_base_t
{
	char* name;
	eapi_type type;
};

struct eapi_plugin_t
{
	eapi_base_t _base;

	eapi_expose_callback expose_func;
	char* tag_name;
};

eapi_plugin_t* eapi_new_plugin(const char* tag_name, eapi_expose_callback expose_func)
{
	eapi_plugin_t* plugin = (eapi_plugin_t*)malloc(sizeof(eapi_plugin_t));

	plugin->_base.name = (char*)tag_name;
	plugin->tag_name = (char*)tag_name;
	plugin->expose_func = expose_func;
	return plugin;
}

int eapi_free(eapi_base_t* base)
{
	if (base->type == EAPI_BASE_T)
	{
		free(base);
	} else if (base->type == EAPI_PLUGIN_T)
	{
		free((eapi_plugin_t*)base);
	} else
	{
		return -1;
	}
	return 0;
}

char* eapi_get_name(eapi_base_t* base)
{
	if (base->name != NULL)
	{
		return base->name;
	}
	return NULL;
}

char* eapi_plugin_get_tag(eapi_plugin_t* plugin)
{
	return plugin->tag_name;
}

eapi_expose_callback eapi_plugin_get_expose(eapi_plugin_t* plugin)
{
	return plugin->expose_func;
}

plugins.h

/*
 * plugins.h
 * 
 * Copyright 2020 Alvarito050506 <donfrutosgomez@gmail.com>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 * 
 * 
 */

#ifndef E_PAPI
#define E_PAPI
#define EAPI_BASE(ext) (eapi_base_t*)ext
#define EAPI_EXPOSE(func) (eapi_expose_callback)func
#include <gtk/gtk.h>

/* Obscure type(s), if you really want to access the definition(s), go to the `plugins.c` file. */
typedef struct eapi_base_t eapi_base_t;
typedef struct eapi_plugin_t eapi_plugin_t;
typedef GtkWidget* (*eapi_expose_callback)();
typedef char e_bool;
typedef enum eapi_type {
	EAPI_BASE_T,
	EAPI_PLUGIN_T
} eapi_type;

eapi_plugin_t* eapi_new_plugin(const char* tag_name, eapi_expose_callback expose_func);
int eapi_free(eapi_base_t* base);
char* eapi_get_name(eapi_base_t* base);
char* eapi_plugin_get_tag(eapi_plugin_t* plugin);
eapi_expose_callback eapi_plugin_get_expose(eapi_plugin_t* plugin);

#endif /* E_PAPI */