text: //------------------------------------------------------------------------------
  // GB_mex_bfs: v = bfs (A,s)
  //------------------------------------------------------------------------------
  
  // SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2019, All Rights Reserved.
  // http://suitesparse.com   See GraphBLAS/Doc/License.txt for license.
  
  //------------------------------------------------------------------------------
  
  #include "GB_mex.h"
  
  #define USAGE "v = GB_mex_bfs (A,source)"
  
  #define FREE_ALL                            \
  {                                           \
      GB_MATRIX_FREE (&A) ;                   \
      GB_VECTOR_FREE (&v) ;                   \
      GB_mx_put_global (true, 0) ;            \
  }
  
  void mexFunction
  (
      int nargout,
      mxArray *pargout [ ],
      int nargin,
      const mxArray *pargin [ ]
  )
  {
  
      bool malloc_debug = GB_mx_get_global (true) ;
      GrB_Matrix A = NULL ;
      GrB_Vector v = NULL ;
  
      // check inputs
      GB_WHERE (USAGE) ;
      if (nargout > 1 || nargin < 1 || nargin > 2)
      {
          mexErrMsgTxt ("Usage: " USAGE) ;
      }
  
      // get A (shallow copy)
      A = GB_mx_mxArray_to_Matrix (pargin [0], "A", false, false) ;
      if (A == NULL && !mxIsEmpty (pargin [0]))
      {
          FREE_ALL ;
          mexErrMsgTxt ("A failed") ;
      }
  
      // get source (default is node 1)
      GrB_Index GET_SCALAR (1, GrB_Index, source, 0) ;
  
      // convert source to zero-based
      source-- ;
      printf ("zero-based source node now %g\n", (double) source) ;
  
      // do the bfs
      bfs5m (&v, A, source) ;
  
      // return v to MATLAB
      pargout [0] = GB_mx_Vector_to_mxArray (&v, "v output from bfs", false) ;
  
      FREE_ALL ;
  }
  
  