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: #define PETSC_MEX_ERROR(a) \
 12:   { \
 13:     fprintf(stdout, "sread: %s \n", a); \
 14:     return; \
 15:   }

 17: PETSC_EXTERN void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
 18: {
 19:   int            i, fd, cnt, dt;
 20:   PetscErrorCode ierr;

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

 28:   if (dt == PETSC_DOUBLE) {
 29:     ierr = PetscBinaryWrite(fd, mxGetPr(prhs[1]), cnt, (PetscDataType)dt);
 30:     if (ierr) PETSC_MEX_ERROR("Unable to send double items.");
 31:   } else if (dt == PETSC_INT) {
 32:     int    *tmp = (int *)mxMalloc((cnt + 5) * sizeof(int));
 33:     double *t   = mxGetPr(prhs[1]);
 34:     for (i = 0; i < cnt; i++) tmp[i] = (int)t[i];
 35:     ierr = PetscBinaryWrite(fd, tmp, cnt, (PetscDataType)dt);
 36:     if (ierr) PETSC_MEX_ERROR("Unable to send int items.");
 37:     mxFree(tmp);
 38:   } else if (dt == PETSC_CHAR) {
 39:     char *tmp = (char *)mxMalloc((cnt + 5) * sizeof(char));
 40:     mxGetNChars(prhs[1], tmp, cnt + 1);
 41:     ierr = PetscBinaryWrite(fd, tmp, cnt, (PetscDataType)dt);
 42:     if (ierr) PETSC_MEX_ERROR("Unable to send char items.");
 43:     mxFree(tmp);
 44:   } else PETSC_MEX_ERROR("Unknown datatype.");
 45:   return;
 46: }

 48: int main(int argc, char **argv)
 49: {
 50:   return 0;
 51: }