wcrtomb(3c) [sunos man page]
wcrtomb(3C) Standard C Library Functions wcrtomb(3C) NAME
wcrtomb - convert a wide-character code to a character (restartable) SYNOPSIS
#include <stdio.h> size_t wcrtomb(char *restrict s, wchar_t wc, mbstate_t *restrict ps); DESCRIPTION
If s is a null pointer, the wcrtomb() function is equivalent to the call: wcrtomb(buf, L' ', ps) where buf is an internal buffer. If s is not a null pointer, the wcrtomb() function determines the number of bytes needed to represent the character that corresponds to the wide-character given by wc (including any shift sequences), and stores the resulting bytes in the array whose first element is pointed to by s. At most MB_CUR_MAX bytes are stored. If wc is a null wide-character, a null byte is stored, preceded by any shift sequence needed to restore the initial shift state. The resulting state described is the initial conversion state. If ps is a null pointer, the wcrtomb() function uses its own internal mbstate_t object, which is initialized at program startup to the ini- tial conversion state. Otherwise, the mbstate_t object pointed to by ps is used to completely describe the current conversion state of the associated character sequence. Solaris will behave as if no function defined in the Solaris Reference Manual calls wcrtomb(). The behavior of this function is affected by the LC_CTYPE category of the current locale. See environ(5). RETURN VALUES
The wcrtomb() function returns the number of bytes stored in the array object (including any shift sequences). When wc is not a valid wide-character, an encoding error occurs. In this case, the function stores the value of the macros EILSEQ in errno and returns (size_t)-1; the conversion state is undefined. ERRORS
The wcrtomb() function may fail if: EINVAL The ps argument points to an object that contains an invalid conversion state. EILSEQ Invalid wide-character code is detected. USAGE
If ps is not a null pointer, wcrtomb() uses the mbstate_t object pointed to by ps and the function can be used safely in multithreaded applications, as long as setlocale(3C) is not being called to change the locale. If ps is a null pointer, wcrtomb() uses its internal mbstate_t object and the function is Unsafe in multithreaded applications. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |See NOTES below | +-----------------------------+-----------------------------+ SEE ALSO
mbsinit(3C), setlocale(3C), attributes(5), standards(5), environ(5) SunOS 5.10 1 Nov 2003 wcrtomb(3C)
Check Out this Related Man Page
WCRTOMB(3P) POSIX Programmer's Manual WCRTOMB(3P) PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
wcrtomb - convert a wide-character code to a character (restartable) SYNOPSIS
#include <stdio.h> size_t wcrtomb(char *restrict s, wchar_t wc, mbstate_t *restrict ps); DESCRIPTION
If s is a null pointer, the wcrtomb() function shall be equivalent to the call: wcrtomb(buf, L' ', ps) where buf is an internal buffer. If s is not a null pointer, the wcrtomb() function shall determine the number of bytes needed to represent the character that corresponds to the wide character given by wc (including any shift sequences), and store the resulting bytes in the array whose first element is pointed to by s. At most {MB_CUR_MAX} bytes are stored. If wc is a null wide character, a null byte shall be stored, preceded by any shift sequence needed to restore the initial shift state. The resulting state described shall be the initial conversion state. If ps is a null pointer, the wcrtomb() function shall use its own internal mbstate_t object, which is initialized at program start-up to the initial conversion state. Otherwise, the mbstate_t object pointed to by ps shall be used to completely describe the current conversion state of the associated character sequence. The implementation shall behave as if no function defined in this volume of IEEE Std 1003.1-2001 calls wcrtomb(). If the application uses any of the _POSIX_THREAD_SAFE_FUNCTIONS or _POSIX_THREADS functions, the application shall ensure that the wcr- tomb() function is called with a non-NULL ps argument. The behavior of this function shall be affected by the LC_CTYPE category of the current locale. RETURN VALUE
The wcrtomb() function shall return the number of bytes stored in the array object (including any shift sequences). When wc is not a valid wide character, an encoding error shall occur. In this case, the function shall store the value of the macro [EILSEQ] in errno and shall return (size_t)-1; the conversion state shall be undefined. ERRORS
The wcrtomb() function may fail if: EINVAL ps points to an object that contains an invalid conversion state. EILSEQ Invalid wide-character code is detected. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
None. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
mbsinit(), the Base Definitions volume of IEEE Std 1003.1-2001, <wchar.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE
/The Open Group 2003 WCRTOMB(3P)