- return fp->_r;
-#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, mingw */
-# if defined __sun && defined _LP64 /* Solaris/{SPARC,AMD64} 64-bit */
-# define fp_ ((struct { unsigned char *_ptr; \
- unsigned char *_base; \
- unsigned char *_end; \
- long _cnt; \
- int _file; \
- unsigned int _flag; \
- } *) fp)
+# if defined __DragonFly__
+ return __sreadahead (fp);
+# else
+ return fp_->_r
+ + (HASUB (fp) ? fp_->_ur : 0);
+# endif
+#elif defined __EMX__ /* emx+gcc */
+ if ((fp->_flags & _IOWRT) != 0)
+ return 0;
+ /* Note: fp->_ungetc_count > 0 implies fp->_rcount <= 0,
+ fp->_ungetc_count = 0 implies fp->_rcount >= 0. */
+ /* equivalent to
+ (fp->_ungetc_count == 0 ? fp->_rcount : fp->_ungetc_count - fp->_rcount) */
+ return (fp->_rcount > 0 ? fp->_rcount : fp->_ungetc_count - fp->_rcount);
+#elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */