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/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2009-2012 Gabor Csardi <csardi.gabor@gmail.com>
334 Harvard street, Cambridge, MA 02139 USA
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; either version 2 of the License, or
(at your option) any later version.
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 IGRAPH_ADJLIST_H
#define IGRAPH_ADJLIST_H
#undef __BEGIN_DECLS
#undef __END_DECLS
#ifdef __cplusplus
# define __BEGIN_DECLS extern "C" {
# define __END_DECLS }
#else
# define __BEGIN_DECLS /* empty */
# define __END_DECLS /* empty */
#endif
#include "igraph_constants.h"
#include "igraph_types.h"
#include "igraph_datatype.h"
__BEGIN_DECLS
typedef struct igraph_adjlist_t {
igraph_integer_t length;
igraph_vector_int_t *adjs;
} igraph_adjlist_t;
int igraph_adjlist_init(const igraph_t *graph, igraph_adjlist_t *al,
igraph_neimode_t mode);
int igraph_adjlist_init_empty(igraph_adjlist_t *al, igraph_integer_t no_of_nodes);
igraph_integer_t igraph_adjlist_size(const igraph_adjlist_t *al);
int igraph_adjlist_init_complementer(const igraph_t *graph,
igraph_adjlist_t *al,
igraph_neimode_t mode,
igraph_bool_t loops);
void igraph_adjlist_destroy(igraph_adjlist_t *al);
void igraph_adjlist_clear(igraph_adjlist_t *al);
void igraph_adjlist_sort(igraph_adjlist_t *al);
int igraph_adjlist_simplify(igraph_adjlist_t *al);
int igraph_adjlist_remove_duplicate(const igraph_t *graph,
igraph_adjlist_t *al);
int igraph_adjlist_print(const igraph_adjlist_t *al);
int igraph_adjlist_fprint(const igraph_adjlist_t *al, FILE *outfile);
/* igraph_vector_int_t *igraph_adjlist_get(const igraph_adjlist_t *al, */
/* igraph_integer_t no); */
/**
* \define igraph_adjlist_get
* Query a vector in an adjlist
*
* Returns a pointer to an <type>igraph_vector_int_t</type> object from an
* adjacency list. The vector can be modified as desired.
* \param al The adjacency list object.
* \param no The vertex of which the vertex of adjacent vertices are
* returned.
* \return Pointer to the <type>igraph_vector_int_t</type> object.
*
* Time complexity: O(1).
*/
#define igraph_adjlist_get(al,no) (&(al)->adjs[(long int)(no)])
int igraph_adjlist(igraph_t *graph, const igraph_adjlist_t *adjlist,
igraph_neimode_t mode, igraph_bool_t duplicate);
typedef struct igraph_inclist_t {
igraph_integer_t length;
igraph_vector_t *incs;
} igraph_inclist_t;
int igraph_inclist_init(const igraph_t *graph,
igraph_inclist_t *il,
igraph_neimode_t mode);
int igraph_inclist_init_empty(igraph_inclist_t *il, igraph_integer_t n);
void igraph_inclist_destroy(igraph_inclist_t *il);
void igraph_inclist_clear(igraph_inclist_t *il);
int igraph_inclist_remove_duplicate(const igraph_t *graph,
igraph_inclist_t *il);
int igraph_inclist_print(const igraph_inclist_t *il);
int igraph_inclist_fprint(const igraph_inclist_t *il, FILE *outfile);
/**
* \define igraph_inclist_get
* Query a vector in an incidence list
*
* Returns a pointer to an <type>igraph_vector_t</type> object from an
* incidence list containing edge ids. The vector can be modified,
* resized, etc. as desired.
* \param graph il The incidence list.
* \param no The vertex for which the incident edges are returned.
* \return Pointer to an <type>igraph_vector_t</type> object.
*
* Time complexity: O(1).
*/
#define igraph_inclist_get(il,no) (&(il)->incs[(long int)(no)])
typedef struct igraph_lazy_adjlist_t {
const igraph_t *graph;
igraph_integer_t length;
igraph_vector_t **adjs;
igraph_neimode_t mode;
igraph_lazy_adlist_simplify_t simplify;
} igraph_lazy_adjlist_t;
int igraph_lazy_adjlist_init(const igraph_t *graph,
igraph_lazy_adjlist_t *al,
igraph_neimode_t mode,
igraph_lazy_adlist_simplify_t simplify);
void igraph_lazy_adjlist_destroy(igraph_lazy_adjlist_t *al);
void igraph_lazy_adjlist_clear(igraph_lazy_adjlist_t *al);
/* igraph_vector_t *igraph_lazy_adjlist_get(igraph_lazy_adjlist_t *al, */
/* igraph_integer_t no); */
/**
* \define igraph_lazy_adjlist_get
* Query neighbor vertices
*
* If the function is called for the first time for a vertex then the
* result is stored in the adjacency list and no further query
* operations are needed when the neighbors of the same vertex are
* queried again.
* \param al The lazy adjacency list.
* \param no The vertex id to query.
* \return Pointer to a vector. It is allowed to modify it and
* modification does not affect the original graph.
*
* Time complexity: O(d), the number of neighbor vertices for the
* first time, O(1) for subsequent calls.
*/
#define igraph_lazy_adjlist_get(al,no) \
((al)->adjs[(long int)(no)] != 0 ? ((al)->adjs[(long int)(no)]) : \
(igraph_lazy_adjlist_get_real(al, no)))
igraph_vector_t *igraph_lazy_adjlist_get_real(igraph_lazy_adjlist_t *al,
igraph_integer_t no);
typedef struct igraph_lazy_inclist_t {
const igraph_t *graph;
igraph_integer_t length;
igraph_vector_t **incs;
igraph_neimode_t mode;
} igraph_lazy_inclist_t;
int igraph_lazy_inclist_init(const igraph_t *graph,
igraph_lazy_inclist_t *il,
igraph_neimode_t mode);
void igraph_lazy_inclist_destroy(igraph_lazy_inclist_t *il);
void igraph_lazy_inclist_clear(igraph_lazy_inclist_t *il);
/**
* \define igraph_lazy_inclist_get
* Query incident edges
*
* If the function is called for the first time for a vertex, then the
* result is stored in the incidence list and no further query
* operations are needed when the incident edges of the same vertex are
* queried again.
* \param al The lazy incidence list object.
* \param no The vertex id to query.
* \return Pointer to a vector. It is allowed to modify it and
* modification does not affect the original graph.
*
* Time complexity: O(d), the number of incident edges for the first
* time, O(1) for subsequent calls with the same \p no argument.
*/
#define igraph_lazy_inclist_get(al,no) \
((al)->incs[(long int)(no)] != 0 ? ((al)->incs[(long int)(no)]) : \
(igraph_lazy_inclist_get_real(al, no)))
igraph_vector_t *igraph_lazy_inclist_get_real(igraph_lazy_inclist_t *al,
igraph_integer_t no);
/*************************************************************************
* DEPRECATED TYPES AND FUNCTIONS
*/
typedef igraph_inclist_t igraph_adjedgelist_t;
int igraph_adjedgelist_init(const igraph_t *graph,
igraph_inclist_t *il,
igraph_neimode_t mode);
void igraph_adjedgelist_destroy(igraph_inclist_t *il);
int igraph_adjedgelist_remove_duplicate(const igraph_t *graph,
igraph_inclist_t *il);
int igraph_adjedgelist_print(const igraph_inclist_t *il, FILE *outfile);
/**
* \define igraph_adjedgelist_get
* Query a vector in an incidence list
*
* This macro was superseded by \ref igraph_inclist_get() in igraph 0.6.
* Please use \ref igraph_inclist_get() instead of this macro.
*
* </para><para>
* Deprecated in version 0.6.
*/
#define igraph_adjedgelist_get(ael,no) (&(ael)->incs[(long int)(no)])
typedef igraph_lazy_inclist_t igraph_lazy_adjedgelist_t;
int igraph_lazy_adjedgelist_init(const igraph_t *graph,
igraph_lazy_inclist_t *il,
igraph_neimode_t mode);
void igraph_lazy_adjedgelist_destroy(igraph_lazy_inclist_t *il);
/**
* \define igraph_lazy_adjedgelist_get
* Query a vector in a lazy incidence list
*
* This macro was superseded by \ref igraph_lazy_inclist_get() in igraph 0.6.
* Please use \ref igraph_lazy_inclist_get() instead of this macro.
*
* </para><para>
* Deprecated in version 0.6.
*/
#define igraph_lazy_adjedgelist_get(al,no) \
((al)->incs[(long int)(no)] != 0 ? ((al)->incs[(long int)(no)]) : \
(igraph_lazy_adjedgelist_get_real(al, no)))
igraph_vector_t *igraph_lazy_adjedgelist_get_real(igraph_lazy_inclist_t *al,
igraph_integer_t no);
__END_DECLS
#endif
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