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[crt]

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fix behavior of _sxprintf when a NULL buffer is supplied
fixes ntdll:string winetest

svn path=/trunk/; revision=64056
This commit is contained in:
Christoph von Wittich 2014-09-07 10:34:17 +00:00
parent b84022008b
commit 43a4a1563c
2 changed files with 5 additions and 7 deletions
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9
reactos/lib/sdk/crt/printf/_sxprintf.c
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@ -57,12 +57,6 @@ _sxprintf(
int result;
FILE stream;
/* Check trivial case */
if ((buffer == NULL) && (count == 0) && (sizeOfBuffer == 0))
{
return 0;
}
#if IS_SECAPI
/* Validate parameters */
if (MSVCRT_CHECK_PMT(((buffer == NULL) || (format == NULL) || (sizeOfBuffer <= 0))))
@ -118,7 +112,8 @@ _sxprintf(
buffer[result] = _T('\0');
#else
/* Only zero terminate if there is enough space left */
if (stream._cnt >= sizeof(TCHAR)) *(TCHAR*)stream._ptr = _T('\0');
if ((stream._cnt >= sizeof(TCHAR)) && (stream._ptr))
*(TCHAR*)stream._ptr = _T('\0');
#endif
return result;

3
reactos/lib/sdk/crt/printf/streamout.c
View file

@ -227,6 +227,9 @@ static
int
streamout_char(FILE *stream, int chr)
{
if ((stream->_flag & _IOSTRG) && (!stream->_ptr))
return 1;
#if defined(_USER32_WSPRINTF) || defined(_LIBCNT_)
/* Check if the buffer is full */
if (stream->_cnt < sizeof(TCHAR))