On 4/29/16, lh_mouse <[email protected]> wrote: > snprintf() and _snprintf() are not equivalent. > > Given the following program: > ``` > #include <stdio.h> > > int main(){ > char str[] = "0123456789"; > _snprintf(str, 5, "%s", "-----"); > puts(str); > } > ``` > A standard-conforming program should write a null terminator at str[4], > truncating the output to "----". > The Microsoft _snprintf() follows the semantics of strncpy(). That is, it > does not operate null terminated strings, but 'string fields'. > It overwrites the first five characters without appending a null terminator > (which would cause an overflow apparently), effectively outputting > '-----56789'. > > ------------------ > Best regards, > lh_mouse > 2016-04-29 >
Same goes for vsnprintf / _vsnprintf, which the defs he based his patch on seem have aliases for.. -- O.S. > ------------------------------------------------------------- > 发件人：Hugo Beauzée-Luyssen <[email protected]> > 发送日期：2016-04-29 17:09 > 收件人：mingw-w64-public > 抄送： > 主题：[Mingw-w64-public] [PATCH] crt: Add missing snprintf aliases > > --- > mingw-w64-crt/lib32/msvcr120_app.def.in | 1 + > mingw-w64-crt/lib64/msvcr120_app.def.in | 1 + > 2 files changed, 2 insertions(+) > > diff --git a/mingw-w64-crt/lib32/msvcr120_app.def.in > b/mingw-w64-crt/lib32/msvcr120_app.def.in > index 579edb3..bb1f214 100644 > --- a/mingw-w64-crt/lib32/msvcr120_app.def.in > +++ b/mingw-w64-crt/lib32/msvcr120_app.def.in > @@ -1042,6 +1042,7 @@ _vscwprintf_p > _vscwprintf_p_l > _vsnprintf > vsnprintf == _vsnprintf > +snprintf == _snprintf > _vsnprintf_c > _vsnprintf_c_l > _vsnprintf_l > diff --git a/mingw-w64-crt/lib64/msvcr120_app.def.in > b/mingw-w64-crt/lib64/msvcr120_app.def.in > index 8c60b42..29aafba 100644 > --- a/mingw-w64-crt/lib64/msvcr120_app.def.in > +++ b/mingw-w64-crt/lib64/msvcr120_app.def.in > @@ -984,6 +984,7 @@ _vscwprintf_p > _vscwprintf_p_l > _vsnprintf > vsnprintf == _vsnprintf > +snprintf == _snprintf > _vsnprintf_c > _vsnprintf_c_l > _vsnprintf_l > -- > 2.8.1 > > > ------------------------------------------------------------------------------ > Find and fix application performance issues faster with Applications Manager > Applications Manager provides deep performance insights into multiple tiers > of > your business applications. It resolves application problems quickly and > reduces your MTTR. Get your free trial! > https://ad.doubleclick.net/ddm/clk/302982198;130105516;z > _______________________________________________ > Mingw-w64-public mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/mingw-w64-public > > > > ------------------------------------------------------------------------------ > Find and fix application performance issues faster with Applications Manager > Applications Manager provides deep performance insights into multiple tiers > of > your business applications. It resolves application problems quickly and > reduces your MTTR. Get your free trial! > https://ad.doubleclick.net/ddm/clk/302982198;130105516;z > _______________________________________________ > Mingw-w64-public mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/mingw-w64-public > ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z _______________________________________________ Mingw-w64-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
