Imported Upstream version 1.21

[tar] / lib / fseeko.c

diff --git a/lib/fseeko.c b/lib/fseeko.c
index 7252208a624ffd20d7e197c3702b67a044f5a849..4d6b071e9d61a2d9e438027bf222a1c36f62bf8e 100644 (file)
--- a/lib/fseeko.c
+++ b/lib/fseeko.c
@@ -25,6 +25,8 @@
 /* Get off_t and lseek.  */
 #include <unistd.h>
 
+#include "stdio-impl.h"
+
 #undef fseeko
 #if !HAVE_FSEEKO
 # undef fseek
@@ -41,18 +43,11 @@ rpl_fseeko (FILE *fp, off_t offset, int whence)
 #endif
 
   /* These tests are based on fpurge.c.  */
-#if defined _IO_ferror_unlocked     /* GNU libc, BeOS */
+#if defined _IO_ferror_unlocked || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Linux libc5 */
   if (fp->_IO_read_end == fp->_IO_read_ptr
       && fp->_IO_write_ptr == fp->_IO_write_base
       && fp->_IO_save_base == NULL)
-#elif defined __sferror             /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
-# if defined __NetBSD__ || defined __OpenBSD__ /* NetBSD, OpenBSD */
-   /* See <http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup>
-      and <http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdio/fileext.h?rev=HEAD&content-type=text/x-cvsweb-markup> */
-#  define fp_ub ((struct { struct __sbuf _ub; } *) fp->_ext._base)->_ub
-# else                                         /* FreeBSD, MacOS X, Cygwin */
-#  define fp_ub fp->_ub
-# endif
+#elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
 # if defined __SL64 && defined __SCLE /* Cygwin */
   if ((fp->_flags & __SL64) == 0)
     {
@@ -66,32 +61,20 @@ rpl_fseeko (FILE *fp, off_t offset, int whence)
       fclose (tmp);
     }
 # endif
-  if (fp->_p == fp->_bf._base
-      && fp->_r == 0
-      && fp->_w == ((fp->_flags & (__SLBF | __SNBF | __SRD)) == 0 /* fully buffered and not currently reading? */
-                   ? fp->_bf._size
-                   : 0)
+  if (fp_->_p == fp_->_bf._base
+      && fp_->_r == 0
+      && fp_->_w == ((fp_->_flags & (__SLBF | __SNBF | __SRD)) == 0 /* fully buffered and not currently reading? */
+                    ? fp_->_bf._size
+                    : 0)
       && fp_ub._base == NULL)
+#elif defined __EMX__               /* emx+gcc */
+  if (fp->_ptr == fp->_buffer
+      && fp->_rcount == 0
+      && fp->_wcount == 0
+      && fp->_ungetc_count == 0)
 #elif defined _IOERR                /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, 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 (fp_->_ptr == fp_->_base
       && (fp_->_ptr == NULL || fp_->_cnt == 0))
-# else
-#  if defined _SCO_DS               /* OpenServer */
-#   define _base __base
-#   define _ptr __ptr
-#   define _cnt __cnt
-#  endif
-  if (fp->_ptr == fp->_base
-      && (fp->_ptr == NULL || fp->_cnt == 0))
-# endif
 #elif defined __UCLIBC__            /* uClibc */
   if (((fp->__modeflags & __FLAG_WRITING) == 0
        || fp->__bufpos == fp->__bufstart)
@@ -108,21 +91,20 @@ rpl_fseeko (FILE *fp, off_t offset, int whence)
       off_t pos = lseek (fileno (fp), offset, whence);
       if (pos == -1)
        {
-#if defined __sferror               /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
-         fp->_flags &= ~__SOFF;
+#if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
+         fp_->_flags &= ~__SOFF;
 #endif
          return -1;
        }
       else
        {
-#if defined __sferror               /* FreeBSD, NetBSD, OpenBSD, MacOS X, Cygwin */
-         fp->_offset = pos;
-         fp->_flags |= __SOFF;
-         fp->_flags &= ~__SEOF;
+#if defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */
+         fp_->_offset = pos;
+         fp_->_flags |= __SOFF;
+         fp_->_flags &= ~__SEOF;
+#elif defined __EMX__               /* emx+gcc */
+          fp->_flags &= ~_IOEOF;
 #elif defined _IOERR                /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw */
-# if defined _SCO_DS                /* OpenServer */
-#  define _flag __flag
-# endif
           fp->_flag &= ~_IOEOF;
 #endif
          return 0;