/* EINA_GRAPH - EFL graph processing library
 * Copyright (C) 2013 Jérémy Zurcher
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies of the Software and its Copyright notices. In addition publicly
 * documented acknowledgment must be given that this software has been used if no
 * source code of this software is made available publicly. This includes
 * acknowledgments in either Copyright notices, Manuals, Publicity and Marketing
 * documents or any documentation provided with any product containing this
 * software. This License does not apply to any software that links to the
 * libraries provided by this software (statically or dynamically), but only to
 * the software provided.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef _EINA_GRAPH_PRIVATE_H
#define _EINA_GRAPH_PRIVATE_H

#include <Eina.h>

#include "Eina_Graph.h"

extern int _eina_graph_log_dom;

#ifdef CRITICAL
#undef CRITICAL
#endif
#define CRITICAL(...) EINA_LOG_DOM_CRIT(_eina_graph_log_dom, __VA_ARGS__)

#ifdef ERR
#undef ERR
#endif
#define ERR(...) EINA_LOG_DOM_ERR(_eina_graph_log_dom, __VA_ARGS__)

#ifdef WRN
#undef WRN
#endif
#define WRN(...) EINA_LOG_DOM_WARN(_eina_graph_log_dom, __VA_ARGS__)

#ifdef INF
#undef INF
#endif
#define INF(...) EINA_LOG_DOM_INFO(_eina_graph_log_dom, __VA_ARGS__)

#ifdef DBG
#undef DBG
#endif
#define DBG(...) EINA_LOG_DOM_DBG(_eina_graph_log_dom, __VA_ARGS__)

typedef struct _Eina_Graph_Adjacents
{
   unsigned int *data;
   unsigned int total;
   unsigned int count;
} _Eina_Graph_Adjacents;

static inline void
eina_graph_adjacents_free(_Eina_Graph_Adjacents *adjs)
{
   if (adjs->data)
     free(adjs->data);
   adjs->data = NULL;
}

Eina_Bool
_eina_graph_adjacents_grow(_Eina_Graph_Adjacents *adjs, unsigned int step);

static inline Eina_Bool
eina_graph_adjacents_push(_Eina_Graph_Adjacents *adjs, unsigned int v, unsigned int step)
{
   if (EINA_UNLIKELY((adjs->count + 1) > adjs->total))
     if (!_eina_graph_adjacents_grow(adjs, step))
       return EINA_FALSE;

   adjs->data[adjs->count++] = v;

   return EINA_TRUE;
}

/*+
 * To cast a vertex number into Eina_List data.
 */
#define CAST_V(_v) ((void *) (uintptr_t) _v)

typedef struct _Eina_Graph
{
   unsigned int vertices;
   unsigned int edges;
   unsigned int step;
   _Eina_Graph_Adjacents *adjs;
} _Eina_Graph;

typedef struct _Eina_Graph_DFS
{
   unsigned int s;
   unsigned int vertices;
   Eina_Bool *marked;
   unsigned int *edge_to;
} _Eina_Graph_DFS;

typedef struct _Eina_Graph_BFS
{
   unsigned int s;
   unsigned int vertices;
   Eina_Bool *marked;
   unsigned int *edge_to;
   unsigned int *dist_to;
} _Eina_Graph_BFS;

#endif   /* _EINA_GRAPH_PRIVATE_H */