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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. .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). 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If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner] .TH WCRTOMB 3C "Jun 24, 2014" .SH NAME wcrtomb, wcrtomb_l \- convert a wide-character code to a character (restartable) .SH SYNOPSIS .LP .nf #include \fBsize_t\fR \fBwcrtomb\fR(\fBchar *restrict\fR \fIs\fR, \fBwchar_t\fR \fIwc\fR, \fBmbstate_t *restrict\fR \fIps\fR); .fi .LP .nf #include #include \fBsize_t\fR \fBwcrtomb_l\fR(\fBchar *restrict\fR \fIs\fR, \fBwchar_t\fR \fIwc\fR, \fBmbstate_t *restrict\fR \fIps\fR, \fBlocale_t\fR \fIloc\fR); .fi .SH DESCRIPTION .LP If \fIs\fR is a null pointer, the \fBwcrtomb()\fR function is equivalent to the call: .IP \fBwcrtomb\fR(\fIbuf\fR, L'\e0', \fIps\fR); .LP where \fIbuf\fR is an internal buffer. .LP If \fIs\fR is not a null pointer, the \fBwcrtomb()\fR function determines the number of bytes needed to represent the character that corresponds to the wide-character given by \fIwc\fR (including any shift sequences), and stores the resulting bytes in the array whose first element is pointed to by \fIs\fR. At most \fBMB_CUR_MAX\fR bytes are stored. If \fIwc\fR 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. .LP If \fIps\fR is a null pointer, the \fBwcrtomb()\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. The system will behave as if no function defined in the Reference Manual calls \fBwcrtomb()\fR. .LP The behavior of \fBwcrtomb()\fR is affected by the \fBLC_CTYPE\fR category of the current locale. See \fBenviron\fR(5). The function \fBwcrtomb_l()\fR behaves identically to \fBwcrtomb()\fR, except instead of operating in the current locale, it operates in the locale specified by \fIloc\fR. .SH RETURN VALUES .LP The \fBwcrtomb()\fR function returns the number of bytes stored in the array object (including any shift sequences). When \fIwc\fR is not a valid wide-character, an encoding error occurs. In this case, the function stores the value of the macros \fBEILSEQ\fR in \fBerrno\fR and returns \fB(size_t)\(mi1\fR; the conversion state is undefined. .SH ERRORS .LP The \fBwcrtomb()\fR function may fail if: .sp .ne 2 .na \fB\fBEINVAL\fR\fR .ad .RS 10n The \fIps\fR argument points to an object that contains an invalid conversion state. .RE .sp .ne 2 .na \fB\fBEILSEQ\fR\fR .ad .RS 10n Invalid wide-character code is detected. .RE .SH ATTRIBUTES .LP See \fBattributes\fR(5) for descriptions of the following attributes: .TS box; c | c l | l . ATTRIBUTE TYPE ATTRIBUTE VALUE _ Interface Stability See below. _ MT-Level See below. .TE .LP The \fBwcrtomb()\fR function is Standard. The \fBwcrtomb_l()\fR function is Uncommitted. .LP If \fIps\fR is a null pointer, these functions should be considered Unsafe for use in multithreaded applications. Otherwise, they are MT-Safe. .SH SEE ALSO .LP \fBmbsinit\fR(3C), \fBnewlocale\fR(3C), \fBsetlocale\fR(3C), \fBuselocale\fR(3C), \fBattributes\fR(5), \fBstandards\fR(5), \fBenviron\fR(5)