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Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions 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. This notice shall appear on any product containing this material. .TH wcsrtombs 3C "29 Jan 2015" "SunOS 5.11" "Standard C Library Functions" .SH NAME wcsrtombs \- convert a wide-character string to a character string (restartable) .SH SYNOPSIS .LP .nf #include \fBsize_t\fR \fBwcsrtombs\fR(\fBchar *restrict\fR \fIdst\fR, \fBconst wchar_t **restrict\fR \fIsrc\fR, \fBsize_t\fR \fIlen\fR, \fBmbstate_t *restrict\fR \fIps\fR); .fi .SH DESCRIPTION .sp .LP The \fBwcsrtombs()\fR function converts a sequence of wide-characters from the array indirectly pointed to by \fIsrc\fR into a sequence of corresponding characters, beginning in the conversion state described by the object pointed to by \fIps\fR. If \fIdst\fR is not a null pointer, the converted characters are then stored into the array pointed to by \fIdst\fR. Conversion continues up to and including a terminating null wide-character, which is also stored. Conversion stops earlier in the following cases: .RS +4 .TP .ie t \(bu .el o When a code is reached that does not correspond to a valid character. .RE .RS +4 .TP .ie t \(bu .el o When the next character would exceed the limit of \fIlen\fR total bytes to be stored in the array pointed to by \fIdst\fR (and \fIdst\fR is not a null pointer). .RE .sp .LP Each conversion takes place as if by a call to the \fBwcrtomb()\fR function. .sp .LP If \fIdst\fR is not a null pointer, the pointer object pointed to by \fIsrc\fR is assigned either a null pointer (if conversion stopped due to reaching a terminating null wide-character) or the address just past the last wide-character converted (if any). If conversion stopped due to reaching a terminating null wide-character, the resulting state described is the initial conversion state. .sp .LP If \fIps\fR is a null pointer, the \fBwcsrtombs()\fR function uses its own internal \fBmbstate_t\fR object, which is initialized at program startup to the initial conversion state. Otherwise, the \fBmbstate_t\fR object pointed to by \fIps\fR 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 \fBwcsrtombs()\fR. .sp .LP The behavior of this function is affected by the \fBLC_CTYPE\fR category of the current locale. See \fBenviron\fR(5). .SH RETURN VALUES .sp .LP If conversion stops because a code is reached that does not correspond to a valid character, an encoding error occurs. In this case, the \fBwcsrtombs()\fR function stores the value of the macro \fBEILSEQ\fR in \fBerrno\fR and returns \fB(size_t)\(mi1\fR; the conversion state is undefined. Otherwise, it returns the number of bytes in the resulting character sequence, not including the terminating null (if any). .SH ERRORS .sp .LP The \fBwcsrtombs()\fR function may fail if: .sp .ne 2 .mk .na \fB\fBEINVAL\fR\fR .ad .RS 10n .rt The \fIps\fR argument points to an object that contains an invalid conversion state. .RE .sp .ne 2 .mk .na \fB\fBEILSEQ\fR\fR .ad .RS 10n .rt A wide-character code does not correspond to a valid character. .RE .SH USAGE .sp .LP If \fIps\fR is not a null pointer, \fBwcsrtombs()\fR uses the \fBmbstate_t\fR object pointed to by \fIps\fR and the function can be used safely in multithreaded applications, as long as \fBsetlocale\fR(3C) is not being called to change the locale. If \fIps\fR is a null pointer, \fBwcsrtombs()\fR uses its internal \fBmbstate_t\fR object and the function is Unsafe in multithreaded applications. .SH ATTRIBUTES .sp .LP See \fBattributes\fR(5) for descriptions of the following attributes: .sp .sp .TS tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) . ATTRIBUTE TYPEATTRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelSee the 'Notes' section _ StandardSee \fBstandards\fR(5). .TE .SH SEE ALSO .sp .LP \fBmbsinit\fR(3C), \fBsetlocale\fR(3C), \fBwcrtomb\fR(3C), \fBattributes\fR(5), \fBenviron\fR(5), \fBstandards\fR(5) .SH NOTES .sp .LP If \fIps\fR is not a null pointer, \fBwcsrtombs()\fR and \fBwcsnrtombs()\fR use the \fBmbstate_t\fR object pointed to by \fIps\fR and the function can be used safely in multithreaded applications. If \fIps\fR is a null pointer, \fBwcsrtombs()\fR and \fBwcsnrtombs()\fR use their internal \fBmbstate_t\fR object and the functions are Unsafe in multithreaded applications.