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: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@21817 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 17 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index 86a0832b6..d87ce2882 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+Wed Jan 21 21:43:50 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (rb_io_ungetbyte, rb_io_ungetc): allows nil to reset EOF
+	  flag with ungetting nothing.
+
+	* ruby.c (load_file_internal): rests EOF flag to make possible to
+	  load from stdin after reading data.
+
+Wed Jan 21 15:32:15 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (rb_io_ungetbyte, rb_io_ungetc): clears EOF flag.
+
 Wed Jan 21 13:58:17 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* include/ruby/io.h (FMODE_EOF): EOF flag on TTY.
diff --git a/io.c b/io.c
index d9abd6328..858472074 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);
diff --git a/ruby.c b/ruby.c
index e97475775..9364d4b62 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1552,6 +1552,7 @@ load_file_internal(VALUE arg)
 	    rb_io_ungetbyte(f, c);
 	}
 	require_libraries(opt);	/* Why here? unnatural */
+	rb_io_ungetbyte(f, Qnil);
     }
     if (opt->src.enc.index >= 0) {
 	enc = rb_enc_from_index(opt->src.enc.index);