X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Ffreading.c;h=8012a7a3ae1211679103441b40b290b0a360cb8a;hb=43593319b31e6b0175b8eec4433bac744959822d;hp=f20affce32aaba7e87d3e6faac6a251539652581;hpb=81fe603b84b9ab4565593f0b38b30274dbb73980;p=gnulib.git

diff --git a/lib/freading.c b/lib/freading.c
index f20affce3..8012a7a3a 100644
--- a/lib/freading.c
+++ b/lib/freading.c
@@ -1,5 +1,5 @@
 /* Retrieve information about a FILE stream.
-   Copyright (C) 2007-2009 Free Software Foundation, Inc.
+   Copyright (C) 2007-2013 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -23,7 +23,7 @@
 
 /* Don't use glibc's __freading function in glibc < 2.7, see
    <http://sourceware.org/bugzilla/show_bug.cgi?id=4359>  */
-#if !(HAVE___FREADING && (!defined __GLIBC__ || __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)))
+#if !(HAVE___FREADING && (!defined __GLIBC__ || defined __UCLIBC__ || __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)))
 
 bool
 freading (FILE *fp)
@@ -31,29 +31,44 @@ freading (FILE *fp)
   /* Most systems provide FILE as a struct and the necessary bitmask in
      <stdio.h>, because they need it for implementing getc() and putc() as
      fast macros.  */
-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+# if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
   return ((fp->_flags & _IO_NO_WRITES) != 0
-	  || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0
-	      && fp->_IO_read_base != NULL));
-#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
+          || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0
+              && fp->_IO_read_base != NULL));
+# elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */
   return (fp_->_flags & __SRD) != 0;
-#elif defined __EMX__               /* emx+gcc */
+# elif defined __EMX__               /* emx+gcc */
   return (fp->_flags & _IOREAD) != 0;
-#elif defined _IOERR                /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */
+# elif defined __minix               /* Minix */
+  return (fp->_flags & _IOREADING) != 0;
+# elif defined _IOERR                /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, NonStop Kernel */
+#  if defined __sun                  /* Solaris */
+  return (fp->_flag & _IOREAD) != 0 && (fp->_flag & _IOWRT) == 0;
+#  else
   return (fp->_flag & _IOREAD) != 0;
-#elif defined __UCLIBC__            /* uClibc */
+#  endif
+# elif defined __UCLIBC__            /* uClibc */
   return (fp->__modeflags & (__FLAG_READONLY | __FLAG_READING)) != 0;
-#elif defined __QNX__               /* QNX */
+# elif defined __QNX__               /* QNX */
   return ((fp->_Mode & 0x2 /* _MOPENW */) == 0
-	  || (fp->_Mode & 0x1000 /* _MREAD */) != 0);
-#elif defined __MINT__              /* Atari FreeMiNT */
-  return (!fp->__mode.__write
-	  || (fp->__mode.__read
-	      && (fp->__buffer < fp->__get_limit
-		  /*|| fp->__bufp == fp->__put_limit ??*/)));
-#else
- #error "Please port gnulib freading.c to your platform!"
-#endif
+          || (fp->_Mode & 0x1000 /* _MREAD */) != 0);
+# elif defined __MINT__              /* Atari FreeMiNT */
+  if (!fp->__mode.__write)
+    return 1;
+  if (!fp->__mode.__read)
+    return 0;
+#  ifdef _IO_CURRENTLY_GETTING /* Flag added on 2009-02-28 */
+  return (fp->__flags & _IO_CURRENTLY_GETTING) != 0;
+#  else
+  return (fp->__buffer < fp->__get_limit /*|| fp->__bufp == fp->__put_limit ??*/);
+#  endif
+# elif defined EPLAN9                /* Plan9 */
+  if (fp->state == 0 /* CLOSED */ || fp->state == 4 /* WR */)
+    return 0;
+  return (fp->state == 3 /* RD */ && (fp->bufl == 0 || fp->rp < fp->wp));
+# else
+#  error "Please port gnulib freading.c to your platform!"
+# endif
 }
 
 #endif