1 files changed, 115 insertions, 0 deletions
diff --git a/src/deg_seq/deg_seq.c b/src/deg_seq/deg_seq.c
new file mode 100644
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--- /dev/null
+++ b/src/deg_seq/deg_seq.c
@@ -0,0 +1,115 @@
+/**
+ *  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 3 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, 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 prints the degree sequence of a graph given as input
+ *
+ */
+
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "utils.h"
+
+
+#define DISTR_ONLY 0x01
+#define SEQ_ONLY   0x02 
+#define BOTH       0x04
+
+
+void usage(char *argv[]){
+  printf("********************************************************************\n"
+         "**                                                                **\n"
+         "**                      -*-    deg_seq    -*-                     **\n"
+         "**                                                                **\n"
+         "**   Compute the degree sequence of a graph given as input.       **\n"
+         "**                                                                **\n"
+         "**   The input file 'graph_in' is an edge-list:                   **\n"
+         "**                                                                **\n"
+         "**                            I_1 J_1                             **\n"
+         "**                            I_2 J_2                             **\n"
+         "**                            I_3 J_3                             **\n"
+         "**                            ... ...                             **\n"
+         "**                            I_K J_K                             **\n"
+         "**                                                                **\n"
+         "**    If 'graph_in' is equal to '-' (dash), read the file from    **\n" 
+         "**    the standard input (STDIN).                                 **\n"
+         "**                                                                **\n"
+         "**    The program prints on output the degree of each node, one   **\n"
+         "**    on each line.                                               **\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"
+         " Please visit http://www.complex-networks.net for more information\n\n"
+         " (c) Vincenzo Nicosia 2009-2017 (v.nicosia@qmul.ac.uk)\n"
+         "********************************************************************\n\n"
+         );
+  printf("Usage: %s <graph_in>\n" , argv[0]);
+}
+
+
+void print_deg_seq(FILE *fileout, unsigned int *r, unsigned int N){
+  
+  int i;
+
+  for(i=1; i<N +1; i ++)
+    fprintf(fileout, "%d\n", r[i] - r[i-1] );
+}
+
+
+int main(int argc, char *argv[]){
+
+  unsigned int *J_slap=NULL, *r_slap=NULL;
+  unsigned int K, N;
+  FILE *filein;
+  
+  if (argc < 2){
+    usage(argv);
+    exit(1);
+  }
+  
+  if(!strcmp(argv[1], "-")){
+    filein = stdin;
+  }
+  else{
+    filein = openfile_or_exit(argv[1], "r", 2);
+  }
+
+  read_slap(filein, &K, &N, &J_slap, &r_slap);
+
+  fclose(filein);
+  
+  print_deg_seq(stdout, r_slap, N);
+  free(J_slap);
+  free(r_slap);
+}