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-rw-r--r--libio/genops.c7
-rw-r--r--libio/wgenops.c2
2 files changed, 9 insertions, 0 deletions
diff --git a/libio/genops.c b/libio/genops.c
index bffc355..89a3dfc 100644
--- a/libio/genops.c
+++ b/libio/genops.c
@@ -194,6 +194,9 @@ __overflow (f, ch)
_IO_FILE *f;
int ch;
{
+ /* This is a single-byte stream. */
+ if (f->_mode == 0)
+ _IO_fwide (f, -1);
return _IO_OVERFLOW (f, ch);
}
@@ -285,6 +288,8 @@ __underflow (fp)
if (fp->_vtable_offset == 0 && _IO_fwide (fp, -1) != -1)
return EOF;
+ if (fp->_mode == 0)
+ _IO_fwide (fp, -1);
if (_IO_in_put_mode (fp))
if (_IO_switch_to_get_mode (fp) == EOF)
return EOF;
@@ -313,6 +318,8 @@ __uflow (fp)
if (fp->_vtable_offset == 0 && _IO_fwide (fp, -1) != -1)
return EOF;
+ if (fp->_mode == 0)
+ _IO_fwide (fp, -11);
if (_IO_in_put_mode (fp))
if (_IO_switch_to_get_mode (fp) == EOF)
return EOF;
diff --git a/libio/wgenops.c b/libio/wgenops.c
index f822c8d..242f3a0 100644
--- a/libio/wgenops.c
+++ b/libio/wgenops.c
@@ -272,6 +272,8 @@ __wunderflow (fp)
if (fp->_mode < 0 || (fp->_mode == 0 && _IO_fwide (fp, 1) != 1))
return WEOF;
+ if (fp->_mode == 0)
+ _IO_fwide (fp, 1);
if (_IO_in_put_mode (fp))
if (_IO_switch_to_wget_mode (fp) == EOF)
return WEOF;