1: /*

  3:     This is the equivalent of MATLAB's fwrite() only on sockets instead of
  4:    binary files.
  5: */

  7:  #include <petscsys.h>
  8:  #include <../src/sys/classes/viewer/impls/socket/socket.h>
  9: #include <mex.h>

 11: PetscErrorCode PetscBinaryWrite(int,void *p,int,PetscDataType,PetscBool);

 13: #define PETSC_MEX_ERROR(a) {fprintf(stdout,"sread: %s \n",a); return;}
 14: /*-----------------------------------------------------------------*/
 15: /*                                                                 */
 16: /*-----------------------------------------------------------------*/
 17: PETSC_EXTERN void mexFunction(int nlhs,mxArray *plhs[],int nrhs,const mxArray *prhs[])
 18: {
 19:   int            i,fd,cnt,dt;

 22:   /* check output parameters */
 23:   if (nrhs != 3) PETSC_MEX_ERROR("Receive requires three input arguments.");
 24:   fd  = (int) mxGetScalar(prhs[0]);
 25:   cnt = mxGetNumberOfElements(prhs[1]);
 26:   dt  = (PetscDataType) mxGetScalar(prhs[2]);

 28:   if (dt == PETSC_DOUBLE) {
 29:     PetscBinaryWrite(fd,mxGetPr(prhs[1]),cnt,(PetscDataType)dt,PETSC_FALSE);if (ierr) PETSC_MEX_ERROR("Unable to send double items.");
 30:   } else if (dt == PETSC_INT) {
 31:     int    *tmp = (int*) mxMalloc((cnt+5)*sizeof(int));
 32:     double *t   = mxGetPr(prhs[1]);
 33:     for (i=0; i<cnt; i++) tmp[i] = (int)t[i];
 34:     PetscBinaryWrite(fd,tmp,cnt,(PetscDataType)dt,PETSC_FALSE);if (ierr) PETSC_MEX_ERROR("Unable to send int items.");
 35:     mxFree(tmp);
 36:   } else if (dt == PETSC_CHAR) {
 37:     char *tmp = (char*) mxMalloc((cnt+5)*sizeof(char));
 38:     mxGetNChars(prhs[1],tmp,cnt+1);
 39:     PetscBinaryWrite(fd,tmp,cnt,(PetscDataType)dt,PETSC_FALSE);if (ierr) PETSC_MEX_ERROR("Unable to send char items.");
 40:     mxFree(tmp);
 41:   } else PETSC_MEX_ERROR("Unknown datatype.");
 42:   return;
 43: }

 45: int main(int argc, char **argv)
 46: {
 47:   return 0;
 48: }