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Man Pages


Manual Reference Pages  -  WCSRTOMBS (3)

NAME

wcsrtombs, wcsnrtombs - convert a wide-character string to a character string (restartable)

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
Standards

LIBRARY


.Lb libc

SYNOPSIS


.In wchar.h size_t
.Fo wcsrtombs char * restrict dst const wchar_t ** restrict src size_t len mbstate_t * restrict ps
.Fc size_t
.Fo wcsnrtombs char * restrict dst const wchar_t ** restrict src size_t nwc size_t len mbstate_t * restrict ps
.Fc

DESCRIPTION

The wcsrtombs function converts a string of wide characters indirectly pointed to by src to a corresponding multibyte character string stored in the array pointed to by dst. No more than len bytes are written to dst.

If dst is NULL, no characters are stored.

If dst is not NULL, the pointer pointed to by src is updated to point to the character after the one that conversion stopped at. If conversion stops because a null character is encountered, *src is set to NULL.

The
.Vt mbstate_t argument, ps, is used to keep track of the shift state. If it is NULL, wcsrtombs uses an internal, static
.Vt mbstate_t object, which is initialized to the initial conversion state at program startup.

The wcsnrtombs function behaves identically to wcsrtombs, except that conversion stops after reading at most nwc characters from the buffer pointed to by src.

RETURN VALUES

The wcsrtombs and wcsnrtombs functions return the number of bytes stored in the array pointed to by dst (not including any terminating null), if successful, otherwise it returns (Vt size_t-1).

ERRORS

The wcsrtombs and wcsnrtombs functions will fail if:
[EILSEQ]
  An invalid wide character was encountered.
[EINVAL]
  The conversion state is invalid.

SEE ALSO

mbsrtowcs(3), wcrtomb(3), wcstombs(3)

STANDARDS

The wcsrtombs function conforms to -isoC-99.

The wcsnrtombs function is an extension to the standard.

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