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All Rights Reserved. .\" Portions Copyright (c) 2003, Sun Microsystems, Inc. All Rights Reserved. .\" Copyright 2014 Garrett D'Amore .\" .TH WCSRTOMBS 3C "Jul 13, 2014" .SH NAME wcsnrtombs, wcsnrtombs_l, wcsrtombs, wcsrtombs_l \- 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 .LP .nf \fBsize_t\fR \fBwcsnrtombs\fR(\fBchar *restrict\fR \fIdst\fR, \fBconst wchar_t **restrict\fR \fIsrc\fR, \fBsize_t\fR \fInwc\fR, \fBsize_t\fR \fIlen\fR, \fBmbstate_t *restrict\fR \fIps\fR); .fi .LP .nf #include #include \fBsize_t\fR \fBwcsrtombs_l\fR(\fBchar *restrict\fR \fIdst\fR, \fBconst wchar_t **restrict\fR \fIsrc\fR, \fBsize_t\fR \fIlen\fR, \fBmbstate_t *restrict\fR \fIps\fR, \fBlocale_t\fR \fIloc\fR); .fi .LP .nf \fBsize_t\fR \fBwcsnrtombs_l\fR(\fBchar *restrict\fR \fIdst\fR, \fBconst wchar_t **restrict\fR \fIsrc\fR, \fBsize_t\fR \fInwc\fR, \fBsize_t\fR \fIlen\fR, \fBmbstate_t *restrict\fR \fIps\fR, \fBlocale_t\fR \fIloc\fR); .fi .SH DESCRIPTION .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 .RS +4 .TP .ie t \(bu .el o In the case of \fBwcsnrtombs()\fR and \fBwcsnrtombs_l()\fR, when \fInwc\fR wide characters have been completely converted. .RE .LP Each conversion takes place as if by a call to the \fBwcrtomb()\fR function. .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. .LP If \fIps\fR is a null pointer, these functions uses their 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 any of these functions. .LP The behavior of \fBwcsrtombs()\fR and \fBwcsnrtombs()\fR are affected by the \fBLC_CTYPE\fR category of the current locale. See \fBenviron\fR(7). .LP The \fBwcsrtombs_l()\fR and \fBwcsnrtombs_l()\fR functions behave identically to \fBwcsrtombs()\fR and \fBwcsnrtombs()\fR respectively, except that instead of operating in the current locale, they operate in the locale specified by \fIloc\fR. .SH RETURN VALUES .LP If conversion stops because a code is reached that does not correspond to a valid character, an encoding error occurs. In this case, these functions store the value of the macro \fBEILSEQ\fR in \fBerrno\fR and return \fB(size_t)\(mi1\fR; the conversion state is undefined. Otherwise, they return the number of bytes in the resulting character sequence, not including the terminating null (if any). .SH ERRORS .LP These functions 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 A wide-character code does not correspond to a valid character. .RE .SH ATTRIBUTES .LP See \fBattributes\fR(7) 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 \fBwcsrtombs()\fR and \fBwcsnrtombs()\fR functions are Standard. The \fBwcsrtombs_l()\fR and \fBwcsnrtombs_l()\fR functions are 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 .BR mbsinit (3C), .BR newlocale (3C), .BR setlocale (3C), .BR uselocale (3C), .BR wcrtomb (3C), .BR attributes (7), .BR environ (7), .BR standards (7)