static void _ccv_write_binary_fd(ccv_dense_matrix_t* mat, FILE* fd, void* conf)

{

  fwrite("CCVBINDM", 1, 8, fd);

  int ctype = mat->type & 0xFFFFF;

  fwrite(&ctype, 1, 4, fd);

  fwrite(&(mat->rows), 1, 4, fd);

  fwrite(&(mat->cols), 1, 4, fd);

  fwrite(mat->data.u8, 1, mat->step * mat->rows, fd);

  fflush(fd);

}

static int _ccv_write_plain_stream(ccv_dense_matrix_t* mat, void* buf, size_t len)

{

  if (len < 20 + mat->step * mat->rows)

    return -1;

  memcpy(buf, "CCVBINDM", 8);

  int ctype = mat->type & 0xFFFFF;

  memcpy(buf + 8, &ctype, 4);

  memcpy(buf + 12, &mat->rows, 4);

  memcpy(buf + 16, &mat->cols, 4);

  memcpy(buf + 20, mat->data.u8, mat->step * mat->rows);

  return 0;

}

static void _ccv_read_binary_fd(FILE* in, ccv_dense_matrix_t** x, int type)

{

  fseek(in, 8, SEEK_SET);

  fread(&type, 1, 4, in);

  int rows, cols;

  fread(&rows, 1, 4, in);

  fread(&cols, 1, 4, in);

  *x = ccv_dense_matrix_new(rows, cols, type, 0, 0);

  fread((*x)->data.u8, 1, (*x)->step * (*x)->rows, in);

}