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Fix ftell bug after ungetc. 

* libc/stdio/ftell.c (_ftell_r): Don't flush ungetc buffer on
ftell.
* libc/stdio64/ftello64.c (_ftello64_r): Likewise.
* libc/stdio/fflush.c (_fflush_r): Clear unget buffer when
repositioning underlying fd offset.
-------------------------------------------------------------------
This commit is contained in:
Eric Blake 2008-03-04 02:22:36 +00:00
parent be62101c60
commit 9ae00e9e07
4 changed files with 23 additions and 6 deletions
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9
newlib/ChangeLog
View File

@ -1,3 +1,12 @@
2008-03-03 Eric Blake <ebb9@byu.net>
Fix ftell bug after ungetc.
* libc/stdio/ftell.c (_ftell_r): Don't flush ungetc buffer on
ftell.
* libc/stdio64/ftello64.c (_ftello64_r): Likewise.
* libc/stdio/fflush.c (_fflush_r): Clear unget buffer when
repositioning underlying fd offset.
2008-03-02 Jeff Johnston <jjohnstn@redhat.com>
* libc/include/getopt.h (no_argument): Added for glibc compatibility.

2
newlib/libc/stdio/fflush.c
View File

@ -164,6 +164,8 @@ _DEFUN(_fflush_r, (ptr, fp),
fp->_p = fp->_bf._base;
if (fp->_flags & __SOFF)
fp->_offset = curoff;
if (HASUB (fp))
FREEUB (ptr, fp);
}
else
{

9
newlib/libc/stdio/ftell.c
View File

@ -118,9 +118,12 @@ _DEFUN(_ftell_r, (ptr, fp),
return -1L;
}
/* Find offset of underlying I/O object, then
adjust for buffered bytes. */
_fflush_r (ptr, fp); /* may adjust seek offset on append stream */
/* Find offset of underlying I/O object, then adjust for buffered
bytes. Flush a write stream, since the offset may be altered if
the stream is appending. Do not flush a read stream, since we
must not lose the ungetc buffer. */
if (fp->_flags & __SWR)
_fflush_r (ptr, fp);
if (fp->_flags & __SOFF)
pos = fp->_offset;
else

9
newlib/libc/stdio64/ftello64.c
View File

@ -108,9 +108,12 @@ _DEFUN (_ftello64_r, (ptr, fp),
return -1L;
}
/* Find offset of underlying I/O object, then
adjust for buffered bytes. */
_fflush_r (ptr, fp); /* may adjust seek offset on append stream */
/* Find offset of underlying I/O object, then adjust for buffered
bytes. Flush a write stream, since the offset may be altered if
the stream is appending. Do not flush a read stream, since we
must not lose the ungetc buffer. */
if (fp->_flags & __SWR)
_fflush_r (ptr, fp);
if (fp->_flags & __SOFF)
pos = fp->_offset;
else