mbsrtowcs(3C)															     mbsrtowcs(3C)

NAME

       mbsrtowcs() - convert a character string to a wide-character string (restartable)

SYNOPSIS

DESCRIPTION

       The  function converts a sequence of characters, beginning in the conversion state described by the object pointed to by ps, from the array
       indirectly pointed to by src into a sequence of corresponding wide-characters.  If dst is not a null pointer, the converted characters  are
       stored  into  the  array  pointed  to by dst.  Conversion continues up to and including a terminating null character, which is also stored.
       Conversion stops early in either of the following cases:

	      o  When a sequence of bytes is encountered that does not from a valid character.

	      o  When len codes have been stored into the array pointed to by dst (and dst is not a null pointer).

       Each conversion takes place as if by a call to the function.

       If dst is not a null pointer, the pointer object pointed to by src is assigned either a null pointer (if conversion stopped due to reaching
       a terminating null character) or the address just past the last character converted (if any).  If conversion stopped due to reaching a ter-
       minating null character, and if dst is not a null pointer, the resulting state described is the initial conversion state.

       If ps is a null pointer, the function uses its own internal mbstate_t object, which is initialized at program startup to the  initial  con-
       version state.  Otherwise, the mbstate_t object pointed to by ps is used to completely describe the current conversion state of the associ-
       ated character sequence.  The implementation will behave as if no function defined in this specification calls

APPLICATION USAGE

       The prototype of this function is available to applications if they are:

	      a. conformant.

	      b. Compiled with macro with a value >=500.

	      c. Compiled with macro with a value >= 200112.

EXTERNAL INFLUENCES

   Environment Variables
       The behavior of this function is affected by the category of the current locale.

RETURN VALUE

       If the input conversion encounters a sequence of bytes that do not form a valid character, an encoding error occurs.   In  this	case,  the
       function  stores  the value of the macro in and returns (size_t)-1; the conversion state is undefined.  Otherwise, it returns the number of
       characters successfully converted, not including the terminating null (if any).

ERRORS

       The function may fail if:

	      Invalid character sequence is detected.

	      ps	     points to an object that contains an invalid conversion state.

WARNINGS

       With the exception of ASCII characters, the code values of wide characters (type of are specific to the effective locale specified  by  the
       environment variable.  These values may not be compatible with values obtained by specifying other locales that are supported now, or which
       may be supported in the future.	It is recommended that wide character constants and wide string literals (see the not be  used,  and  that
       wide  character code values not be stored in files or devices because future standards may dictate changes in the code value assignments of
       the wide characters.  However, wide character constants and wide string literals corresponding to the characters of the ASCII code set  can
       be safely used since their values are guaranteed to be the same as their ASCII code set values.

AUTHOR

       was developed by HP and Mitsubishi Electric Corporation.

SEE ALSO

       mbrtowc(3C), mbsinit(3C), glossary(9).

																     mbsrtowcs(3C)