Piotr Caban : msvcrt: Don' t write to buffer in ungetc if _IOSTRG flag is specified.
Alexandre Julliard
julliard at winehq.org
Mon Dec 30 13:06:00 CST 2013
Module: wine
Branch: master
Commit: ed2d53a36aa413e00c577e11772915bc5de4161e
URL: http://source.winehq.org/git/wine.git/?a=commit;h=ed2d53a36aa413e00c577e11772915bc5de4161e
Author: Piotr Caban <piotr at codeweavers.com>
Date: Mon Dec 30 16:55:59 2013 +0100
msvcrt: Don't write to buffer in ungetc if _IOSTRG flag is specified.
---
dlls/msvcrt/file.c | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/dlls/msvcrt/file.c b/dlls/msvcrt/file.c
index 4665e6b..04651fb 100644
--- a/dlls/msvcrt/file.c
+++ b/dlls/msvcrt/file.c
@@ -4713,7 +4713,15 @@ int CDECL MSVCRT_ungetc(int c, MSVCRT_FILE * file)
file->_ptr++;
if(file->_ptr>file->_base) {
file->_ptr--;
- *file->_ptr=c;
+ if(file->_flag & MSVCRT__IOSTRG) {
+ if(*file->_ptr != c) {
+ file->_ptr++;
+ MSVCRT__unlock_file(file);
+ return MSVCRT_EOF;
+ }
+ }else {
+ *file->_ptr = c;
+ }
file->_cnt++;
MSVCRT_clearerr(file);
MSVCRT__unlock_file(file);
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