text: //------------------------------------------------------------------------------
  // GB_mex_resize: resize a matrix
  //------------------------------------------------------------------------------
  
  // SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2022, All Rights Reserved.
  // SPDX-License-Identifier: Apache-2.0
  
  //------------------------------------------------------------------------------
  
  #include "GB_mex.h"
  
  #define USAGE "C = GB_mex_resize (A, nrows_new, ncols_new)"
  
  #define FREE_ALL                        \
  {                                       \
      GrB_Matrix_free_(&C) ;              \
      GB_mx_put_global (true) ;           \
  }
  
  void mexFunction
  (
      int nargout,
      mxArray *pargout [ ],
      int nargin,
      const mxArray *pargin [ ]
  )
  {
  
      bool malloc_debug = GB_mx_get_global (true) ;
      GrB_Matrix C = NULL ;
  
      // check inputs
      if (nargout > 1 || nargin < 1 || nargin > 3)
      {
          mexErrMsgTxt ("Usage: " USAGE) ;
      }
  
      #define GET_DEEP_COPY \
      C = GB_mx_mxArray_to_Matrix (pargin [0], "C input", true, true) ;
      #define FREE_DEEP_COPY GrB_Matrix_free_(&C) ;
  
      GET_DEEP_COPY ;
      if (C == NULL)
      {
          FREE_ALL ;
          mexErrMsgTxt ("C failed") ;
      }
  
      // get vlen_new
      int64_t GET_SCALAR (1, int64_t, vlen_new, C->vlen) ;
  
      // get vdim_new
      int64_t GET_SCALAR (2, int64_t, vdim_new, C->vdim) ;
  
      // resize the matrix
      if (vlen_new % 5 == 0)
      {
          // test the old GxB functions
          if (GB_VECTOR_OK (C) && vdim_new == 1)
          {
              // resize C as a vector
              METHOD (GxB_Vector_resize ((GrB_Vector) C, vlen_new)) ;
          }
          else
          {
              // resize C as a matrix
              METHOD (GxB_Matrix_resize (C, vlen_new, vdim_new)) ;
          }
      }
      else
      {
          // test the new GrB functions
          if (GB_VECTOR_OK (C) && vdim_new == 1)
          {
              // resize C as a vector
              METHOD (GrB_Vector_resize_((GrB_Vector) C, vlen_new)) ;
          }
          else
          {
              // resize C as a matrix
              METHOD (GrB_Matrix_resize_(C, vlen_new, vdim_new)) ;
          }
      }
  
      // return C as a struct and free the GraphBLAS C
      pargout [0] = GB_mx_Matrix_to_mxArray (&C, "C output", true) ;
  
      FREE_ALL ;
  }
  
  