setb
void setb(char* b, char* eb, int a=0);
setb(buffer, buffer+buf_size, 1);
setb(new_buffer, new_buffer + 2 * old_size, 1);
setb((char*)NewLine, (char*)NewLine+1, 0);
setb(buf, buf+len, delete_at_close);
setb(_shortbuf, _shortbuf+1, 0);
setb(p, p+len, 0);
setb(buf, buf + initial_size, 1);