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OpenSolaris 2009.06 - man page for mbsinit (opensolaris section 3c)

mbsinit(3C)						   Standard C Library Functions 					       mbsinit(3C)

mbsinit - determine conversion object status
#include <wchar.h> int mbsinit(const mbstate_t *ps);
If ps is not a null pointer, the mbsinit() function determines whether the object pointed to by ps describes an initial conversion state.
The mbsinit() function returns non-zero if ps is a null pointer, or if the pointed-to object describes an initial conversion state; other- wise, it returns 0. If an mbstate_t object is altered by any of the functions described as "restartable", and is then used with a different character sequence, or in the other conversion direction, or with a different LC_CTYPE category setting than on earlier function calls, the behavior is unde- fined. See environ(5).
No errors are defined.
The mbstate_t object is used to describe the current conversion state from a particular character sequence to a wide-character sequence (or vice versa) under the rules of a particular setting of the LC_CTYPE category of the current locale. The initial conversion state corresponds, for a conversion in either direction, to the beginning of a new character sequence in the initial shift state. A zero-valued mbstate_t object is at least one way to describe an initial conversion state. A zero-valued mbstate_t object can be used to initiate conversion involving any character sequence, in any LC_CTYPE category setting.
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe with exceptions | +-----------------------------+-----------------------------+
mbrlen(3C), mbrtowc(3C), mbsrtowcs(3C), setlocale(3C), wcrtomb(3C), wcsrtombs(3C), attributes(5), environ(5), standards(5)
The mbsinit() function can be used safely in multithreaded applications, as long as setlocale(3C) is not being called to change the locale. SunOS 5.11 24 Jul 2002 mbsinit(3C)