Date: Sat, 15 Nov 2014 12:29:14 -0500 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: [PATCH] implement a private state for the uchar.h functions On Sun, Nov 09, 2014 at 11:18:08AM +0100, Jens Gustedt wrote: > The C standard is imperative on that: > > 7.28.1 ... If ps is a null pointer, each function uses its own internal > mbstate_t object instead, which is initialized at program startup to > the initial conversion state; > > and these functions are also not supposed to implicitly use the state of > the wchar.h functions: > > 126.96.36.199 ... The implementation behaves as if no library function calls > these functions with a null pointer for ps. > > Previously this resulted in two bugs. > > - The functions c16rtomb and mbrtoc16 would crash when called with ps > set to null. > > - The functions c32rtomb and mbrtoc32 used the private states of wcrtomb > and mbrtowc, respectively, which they are not allowed to do. One small correction: wcrtomb has no state, and c32rtomb does not need any either. Rich
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