#ifndef INCLUDED_C_CC_H
#define INCLUDED_C_CC_H

#ifndef INCLUDED_C_GRAPH_H
#include <c_Graph.h>
#endif /*INCLUDED_C_GRAPH_H*/


/* ------------------------------------------------------------------------------------------------------------------ */
/*  */

typedef struct {
    c_bool_t*     marked;     // marked[v] = has vertex v been discovered?
    c_size_t*     id;         // id[v] = connected component identifier id of v
    c_size_t*     size;       // size[id] = number of vertices in component id
    c_size_t      count;      // Total number of isolated connected components
    c_size_t      V;
    c_Allocator_t allocator;  // Memory allocator reference instance copy
} c_CC_t;


/**
 * @brief Computes the connected components partition of an undirected graph.
 * @param self Pointer to the uninitialized connected components state tracker.
 * @param G Pointer to the constant target graph object to process.
 * @param allocator Memory allocator instance pointer to deploy.
 * @return C_SUCCESS on success, or an error status code on allocation failure.
 */
c_err_t  c_CC_Init(c_CC_t* self, const c_Graph_t* G, c_Allocator_t* allocator);

/**
 * @brief Drops all internal allocation states within the CC structural instance safely.
 */
void     c_CC_Destroy(c_CC_t* self);

/**
 * @brief Are vertices v and w in the same connected component cluster?
 */
c_bool_t c_CC_Connected(const c_CC_t* self, c_VertexId_t v, c_VertexId_t w);

/**
 * @brief Returns the component identifier id containing vertex v (ranges from 0 to Count()-1).
 */
c_size_t c_CC_Id(const c_CC_t* self, c_VertexId_t v);

/**
 * @brief Returns the number of vertices in the connected component cluster containing vertex v.
 */
c_size_t c_CC_Size(const c_CC_t* self, c_VertexId_t v);

/**
 * @brief Returns the total number of connected components clusters in the graph.
 */
c_size_t c_CC_Count(const c_CC_t* self);

#endif /*INCLUDED_C_CC_H*/