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WCRTOMB(3)            DragonFly Library Functions Manual            WCRTOMB(3)

NAME

wcrtomb, wcrtomb_l, c16rtomb, c16rtomb_l, c32rtomb, c32rtomb_l - convert a wide-character code to a character (restartable)

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <wchar.h> size_t wcrtomb(char * restrict s, wchar_t c, mbstate_t * restrict ps); #include <uchar.h> size_t c16rtomb(char * restrict s, char16_t c, mbstate_t * restrict ps); size_t c32rtomb(char * restrict s, char32_t c, mbstate_t * restrict ps); #include <xlocale.h> size_t wcrtomb_l(char * restrict s, wchar_t c, mbstate_t * restrict ps, locale_t locale); size_t c16rtomb_l(char * restrict s, char16_t c, mbstate_t * restrict ps, locale_t locale); size_t c32rtomb_l(char * restrict s, char32_t c, mbstate_t * restrict ps, locale_t);

DESCRIPTION

The wcrtomb(), wcrtomb_l(), c16rtomb(), c16rtomb_l(), c32rtomb(), and c32rtomb_l() functions store a multibyte sequence representing the wide character c, including any necessary shift sequences, to the character array s, storing a maximum of MB_CUR_MAX bytes. If s is NULL, these functions behave as if s pointed to an internal buffer and c was a null wide character (L'\0'). The mbstate_t argument, ps, is used to keep track of the shift state. If it is NULL, these functions use an internal, static mbstate_t object, which is initialized to the initial conversion state at program startup. As certain multibyte characters may only be represented by a series of 16-bit characters, the c16rtomb() may need to invoked multiple times before a multibyte sequence is returned. The wcrtomb_l(), c16rtomb_l(), and c32rtomb_l() functions take an explicit locale argument, whereas the wcrtomb(), c16rtomb(), and c32rtomb() functions use the current global or per-thread locale.

RETURN VALUES

These functions return the length (in bytes) of the multibyte sequence needed to represent c, or (size_t)-1 if c is not a valid wide character code.

ERRORS

The wcrtomb(), wcrtomb_l(), c16rtomb(), c16rtomb_l(), c32rtomb(), and c32rtomb_l() functions will fail if: [EILSEQ] An invalid wide character code was specified. [EINVAL] The conversion state is invalid.

SEE ALSO

mbrtowc(3), multibyte(3), setlocale(3), wcrtombin(3), wcrtoutf8(3), wctomb(3), xlocale(3)

STANDARDS

The wcrtomb(), c16rtomb() and c32rtomb() functions conform to ISO/IEC 9899:2011 ("ISO C11"). DragonFly 5.5-DEVELOPMENT May 4, 2019 DragonFly 5.5-DEVELOPMENT

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