1 /* 2 3 This is the equivalent of MATLAB's fwrite() only on sockets instead of 4 binary files. 5 */ 6 7 #include <petscsys.h> 8 #include <../src/sys/classes/viewer/impls/socket/socket.h> 9 #include <mex.h> 10 11 PetscErrorCode PetscBinaryWrite(int, const void *p, int, PetscDataType); 12 13 #define PETSC_MEX_ERROR(a) \ 14 { \ 15 fprintf(stdout, "sread: %s \n", a); \ 16 return; \ 17 } 18 19 PETSC_EXTERN void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) 20 { 21 int i, fd, cnt, dt; 22 PetscErrorCode ierr; 23 24 /* check output parameters */ 25 if (nrhs != 3) PETSC_MEX_ERROR("Receive requires three input arguments."); 26 fd = (int)mxGetScalar(prhs[0]); 27 cnt = mxGetNumberOfElements(prhs[1]); 28 dt = (PetscDataType)mxGetScalar(prhs[2]); 29 30 if (dt == PETSC_DOUBLE) { 31 ierr = PetscBinaryWrite(fd, mxGetPr(prhs[1]), cnt, (PetscDataType)dt); 32 if (ierr) PETSC_MEX_ERROR("Unable to send double items."); 33 } else if (dt == PETSC_INT) { 34 int *tmp = (int *)mxMalloc((cnt + 5) * sizeof(int)); 35 double *t = mxGetPr(prhs[1]); 36 for (i = 0; i < cnt; i++) tmp[i] = (int)t[i]; 37 ierr = PetscBinaryWrite(fd, tmp, cnt, (PetscDataType)dt); 38 if (ierr) PETSC_MEX_ERROR("Unable to send int items."); 39 mxFree(tmp); 40 } else if (dt == PETSC_CHAR) { 41 char *tmp = (char *)mxMalloc((cnt + 5) * sizeof(char)); 42 mxGetNChars(prhs[1], tmp, cnt + 1); 43 ierr = PetscBinaryWrite(fd, tmp, cnt, (PetscDataType)dt); 44 if (ierr) PETSC_MEX_ERROR("Unable to send char items."); 45 mxFree(tmp); 46 } else PETSC_MEX_ERROR("Unknown datatype."); 47 return; 48 } 49 50 int main(int argc, char **argv) 51 { 52 return 0; 53 } 54