diff options
Diffstat (limited to 'src/ba')
| -rw-r--r-- | src/ba/Makefile.am | 3 | ||||
| -rw-r--r-- | src/ba/Makefile.in | 564 | ||||
| -rw-r--r-- | src/ba/ba.c | 185 |
3 files changed, 752 insertions, 0 deletions
diff --git a/src/ba/Makefile.am b/src/ba/Makefile.am new file mode 100644 index 0000000..f7238ca --- /dev/null +++ b/src/ba/Makefile.am @@ -0,0 +1,3 @@ +include ../common.mk +bin_PROGRAMS = ba +ba_SOURCES = ba.c diff --git a/src/ba/Makefile.in b/src/ba/Makefile.in new file mode 100644 index 0000000..81afc0b --- /dev/null +++ b/src/ba/Makefile.in @@ -0,0 +1,564 @@ +# Makefile.in generated by automake 1.15 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2014 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +VPATH = @srcdir@ +am__is_gnu_make = { \ + if test -z '$(MAKELEVEL)'; then \ + false; \ + elif test -n '$(MAKE_HOST)'; then \ + true; \ + elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \ + true; \ + else \ + false; \ + fi; \ +} +am__make_running_with_option = \ + case $${target_option-} in \ + ?) ;; \ + *) echo "am__make_running_with_option: internal error: invalid" \ + "target option '$${target_option-}' specified" >&2; \ + exit 1;; \ + esac; \ + has_opt=no; \ + sane_makeflags=$$MAKEFLAGS; \ + if $(am__is_gnu_make); then \ + sane_makeflags=$$MFLAGS; \ + else \ + case $$MAKEFLAGS in \ + *\\[\ \ ]*) \ + bs=\\; \ + sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \ + | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \ + esac; \ + fi; \ + skip_next=no; \ + strip_trailopt () \ + { \ + flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \ + }; \ + for flg in $$sane_makeflags; do \ + test $$skip_next = yes && { skip_next=no; continue; }; \ + case $$flg in \ + *=*|--*) continue;; \ + -*I) strip_trailopt 'I'; skip_next=yes;; \ + -*I?*) strip_trailopt 'I';; \ + -*O) strip_trailopt 'O'; skip_next=yes;; \ + -*O?*) strip_trailopt 'O';; \ + -*l) strip_trailopt 'l'; skip_next=yes;; \ + -*l?*) strip_trailopt 'l';; \ + -[dEDm]) skip_next=yes;; \ + -[JT]) skip_next=yes;; \ + esac; \ + case $$flg in \ + *$$target_option*) has_opt=yes; break;; \ + esac; \ + done; \ + test $$has_opt = yes +am__make_dryrun = (target_option=n; $(am__make_running_with_option)) +am__make_keepgoing = (target_option=k; $(am__make_running_with_option)) +pkgdatadir = $(datadir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkglibexecdir = $(libexecdir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +bin_PROGRAMS = ba$(EXEEXT) +subdir = src/ba +ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 +am__aclocal_m4_deps = $(top_srcdir)/configure.ac +am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ + $(ACLOCAL_M4) +DIST_COMMON = $(srcdir)/Makefile.am $(am__DIST_COMMON) +mkinstalldirs = $(install_sh) -d +CONFIG_HEADER = $(top_builddir)/config.h +CONFIG_CLEAN_FILES = +CONFIG_CLEAN_VPATH_FILES = +am__installdirs = "$(DESTDIR)$(bindir)" +PROGRAMS = $(bin_PROGRAMS) +am_ba_OBJECTS = ba.$(OBJEXT) +ba_OBJECTS = $(am_ba_OBJECTS) +ba_LDADD = $(LDADD) +AM_V_P = $(am__v_P_@AM_V@) +am__v_P_ = $(am__v_P_@AM_DEFAULT_V@) +am__v_P_0 = false +am__v_P_1 = : +AM_V_GEN = $(am__v_GEN_@AM_V@) +am__v_GEN_ = $(am__v_GEN_@AM_DEFAULT_V@) +am__v_GEN_0 = @echo " GEN " $@; +am__v_GEN_1 = +AM_V_at = $(am__v_at_@AM_V@) +am__v_at_ = $(am__v_at_@AM_DEFAULT_V@) +am__v_at_0 = @ +am__v_at_1 = +DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir) +depcomp = $(SHELL) $(top_srcdir)/depcomp +am__depfiles_maybe = depfiles +am__mv = mv -f +COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \ + $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) +AM_V_CC = $(am__v_CC_@AM_V@) +am__v_CC_ = $(am__v_CC_@AM_DEFAULT_V@) +am__v_CC_0 = @echo " CC " $@; +am__v_CC_1 = +CCLD = $(CC) +LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@ +AM_V_CCLD = $(am__v_CCLD_@AM_V@) +am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@) +am__v_CCLD_0 = @echo " CCLD " $@; +am__v_CCLD_1 = +SOURCES = $(ba_SOURCES) +DIST_SOURCES = $(ba_SOURCES) +am__can_run_installinfo = \ + case $$AM_UPDATE_INFO_DIR in \ + n|no|NO) false;; \ + *) (install-info --version) >/dev/null 2>&1;; \ + esac +am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP) +# Read a list of newline-separated strings from the standard input, +# and print each of them once, without duplicates. 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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, see + * <http://www.gnu.org/licenses/>. + * + * (c) Vincenzo Nicosia 2009-2017 -- <v.nicosia@qmul.ac.uk> + * + * This file is part of NetBunch, a package for complex network + * analysis and modelling. For more information please visit: + * + * http://www.complex-networks.net/ + * + * If you use this software, please add a reference to + * + * V. Latora, V. Nicosia, G. Russo + * "Complex Networks: Principles, Methods and Applications" + * Cambridge University Press (2017) + * ISBN: 9781107103184 + * + *********************************************************************** + * + * + * This program grows a network with N nodes using the linear + * preferential attachment model proposed by Barabasi and + * Albert. Each new node creates m links, and the initial (seed) + * network is a ring of n0>=m nodes. + * + * + * References: + * + * [1] A.-L. Barabasi, R. Albert, "Emergence of scaling in random + * networks", Science 286, 509-512 (1999). + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> + +void usage(char *argv[]){ + printf("********************************************************************\n" + "** **\n" + "** -*- ba -*- **\n" + "** **\n" + "** Grow a scale-free network of 'N' nodes using the linear **\n" + "** preferential attachment model (Barabasi-Albert). **\n" + "** The initial network is a ring of 'n0' nodes, and each new **\n" + "** node creates 'm' edges. **\n" + "** **\n" + "** The program prints on STDOUT the edge-list of the final **\n" + "** graph. **\n" + "** **\n" + "********************************************************************\n" + " This is Free Software - You can use and distribute it under \n" + " the terms of the GNU General Public License, version 3 or later\n\n" + " (c) Vincenzo Nicosia 2010-2017 (v.nicosia@qmul.ac.uk)\n\n" + "********************************************************************\n\n" + ); + printf("Usage: %s <N> <m> <n0>\n", argv[0]); + +} + + + +int init_network(unsigned int **S, unsigned int n0){ + + int n; + + for(n=0; n<n0; n++){ + S[0][n] = n; + S[1][n] = (n+1) % n0; + } + return n; +} + +int select_neighbour(unsigned int **S, unsigned int S_num){ + + int d; + + d = rand()%(S_num * 2); + if (d < S_num) + return S[0][d]; + else{ + return S[1][d-S_num]; + } +} + +/* check if 'd' is already a neighbour of 'i' */ + +int already_neighbour(unsigned int **S, unsigned int S_num, unsigned int j, unsigned int d){ + + int i; + + for(i=S_num; i< S_num + j; i ++){ + if (S[1][i] == d) + return 1; + } + return 0; +} + +unsigned int grow_ba_network(unsigned int **S, unsigned int N, + unsigned int m, unsigned int n0, unsigned int S_num){ + + int i, j; + int n, d; + + for(i=0; i<N-n0; i++){ + /* Let's add a new node */ + n = n0 + i; /* This is the id of the new node */ + for(j=0; j<m; j++){ + S[0][S_num+j] = n; + d = select_neighbour(S, S_num); + while(already_neighbour(S, S_num, j, d)){ + d = select_neighbour(S, S_num); + } + S[1][S_num + j] = d; + } + S_num += m; + } + return S_num; +} + + + +int main(int argc, char *argv[]){ + + unsigned int **S; + unsigned int S_num, S_size, i; + int m, n0, N; + + if (argc < 4){ + usage(argv); + exit(1); + } + + srand(time(NULL)); + + N = atoi(argv[1]); + m = atoi(argv[2]); + n0 = atoi(argv[3]); + S_size = (N+n0) * m ; + + if (N < 1){ + fprintf(stderr, "N must be positive\n"); + exit(1); + } + if(m > n0){ + fprintf(stderr, "n0 cannot be smaller than m\n"); + exit(1); + + } + if (n0<1){ + fprintf(stderr, "n0 must be positive\n"); + exit(1); + } + + if (m < 1){ + fprintf(stderr, "m must be positive\n"); + exit(1); + } + + S = malloc(2 * sizeof(unsigned int*)); + S[0] = malloc(S_size * sizeof(unsigned int)); + S[1] = malloc(S_size * sizeof(unsigned int)); + + S_num = init_network(S, n0); + S_num = grow_ba_network(S, N, m, n0, S_num); + for(i=0; i<S_num; i ++){ + printf("%d %d\n",S[0][i], S[1][i]); + } + free(S[0]); + free(S[1]); + free(S); +} |