The Single UNIX ® Specification, Version 2
Copyright © 1997 The Open Group


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; otherwise, it returns zero.

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 behaviour is undefined.


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.




mbrlen(), mbrtowc(), wcrtomb(), mbsrtowcs(), wcsrtombs(), <wchar.h>.


Derived from the ISO/IEC 9899:1990/Amendment 1:1995 (E).

UNIX ® is a registered Trademark of The Open Group.
Copyright © 1997 The Open Group
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