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msvcrt: Handle negative file->_cnt value in fwrite.

This commit is contained in:
Piotr Caban 2014-06-09 14:24:14 +02:00 committed by Alexandre Julliard
parent 755eac8f0c
commit b0424313fd
1 changed files with 5 additions and 1 deletions
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6
dlls/msvcrt/file.c
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@ -3691,7 +3691,11 @@ MSVCRT_size_t CDECL MSVCRT_fwrite(const void *ptr, MSVCRT_size_t size, MSVCRT_si
MSVCRT__lock_file(file);
while(wrcnt) {
if(file->_cnt) {
if(file->_cnt < 0) {
WARN("negative file->_cnt value in %p\n", file);
file->_flag |= MSVCRT__IOERR;
break;
} else if(file->_cnt) {
int pcnt=(file->_cnt>wrcnt)? wrcnt: file->_cnt;
memcpy(file->_ptr, ptr, pcnt);
file->_cnt -= pcnt;