merges r21715 and r21718 from trunk into ruby_1_9_1.

* io.c (rb_io_ungetbyte, rb_io_ungetc): clears EOF flag.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@21817 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/io.c b/io.c
index d9abd63280..8584720742 100644
--- a/io.c
+++ b/io.c
@@ -354,7 +354,8 @@ flush_before_seek(rb_io_t *fptr)
 }
 
 #define io_set_eof(fptr) (void)(((fptr)->mode & FMODE_TTY) && ((fptr)->mode |= FMODE_EOF))
-#define io_seek(fptr, ofs, whence) (fptr->mode &= ~FMODE_EOF, lseek(flush_before_seek(fptr)->fd, ofs, whence))
+#define io_unset_eof(fptr) (fptr->mode &= ~FMODE_EOF)
+#define io_seek(fptr, ofs, whence) (io_unset_eof(fptr), lseek(flush_before_seek(fptr)->fd, ofs, whence))
 #define io_tell(fptr) lseek(flush_before_seek(fptr)->fd, 0, SEEK_CUR)
 
 #ifndef SEEK_CUR
@@ -2845,6 +2846,7 @@ rb_io_ungetbyte(VALUE io, VALUE b)
 
     GetOpenFile(io, fptr);
     rb_io_check_readable(fptr);
+    io_unset_eof(fptr);
     if (NIL_P(b)) return Qnil;
     if (FIXNUM_P(b)) {
 	char cc = FIX2INT(b);
@@ -2881,6 +2883,7 @@ rb_io_ungetc(VALUE io, VALUE c)
 
     GetOpenFile(io, fptr);
     rb_io_check_readable(fptr);
+    io_unset_eof(fptr);
     if (NIL_P(c)) return Qnil;
     if (FIXNUM_P(c)) {
 	int cc = FIX2INT(c);