'\" te .\" Copyright (c) 1992, X/Open Company Limited. All Rights Reserved. Portions Copyright (c) 2003, Sun Microsystems, Inc. All Rights Reserved. .\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at http://www.opengroup.org/bookstore/. .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. 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 mbrlen 3C "1 Nov 2003" "SunOS 5.11" "Standard C Library Functions" .SH NAME mbrlen \- get number of bytes in a character (restartable) .SH SYNOPSIS .LP .nf #include \fBsize_t\fR \fBmbrlen\fR(\fBconst char *restrict\fR \fIs\fR, \fBsize_t\fR \fIn\fR, \fBmbstate_t *restrict\fR \fIps\fR); .fi .SH DESCRIPTION .sp .LP If \fIs\fR is not a null pointer, \fBmbrlen()\fR determines the number of bytes constituting the character pointed to by \fIs\fR. It is equivalent to: .sp .in +2 .nf mbstate_t internal; mbrtowc(NULL, s, n, ps != NULL ? ps : &internal); .fi .in -2 .sp .LP If \fIps\fR is a null pointer, the \fBmbrlen()\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 \fBmbrlen()\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 The \fBmbrlen()\fR function returns the first of the following that applies: .sp .ne 2 .mk .na \fB\fB0\fR\fR .ad .RS 17n .rt If the next \fIn\fR or fewer bytes complete the character that corresponds to the null wide-character. .RE .sp .ne 2 .mk .na \fB\fBpositive\fR\fR .ad .RS 17n .rt If the next \fIn\fR or fewer bytes complete a valid character; the value returned is the number of bytes that complete the character. .RE .sp .ne 2 .mk .na \fB\fB(size_t)\(mi2\fR\fR .ad .RS 17n .rt If the next \fIn\fR bytes contribute to an incomplete but potentially valid character, and all \fIn\fR bytes have been processed. When \fIn\fR has at least the value of the \fBMB_CUR_MAX\fR macro, this case can only occur if \fIs\fR points at a sequence of redundant shift sequences (for implementations with state-dependent encodings). .RE .sp .ne 2 .mk .na \fB\fB(size_t)\(mi1\fR\fR .ad .RS 17n .rt If an encoding error occurs, in which case the next \fIn\fR or fewer bytes do not contribute to a complete and valid character. In this case, \fBEILSEQ\fR is stored in \fBerrno\fR and the conversion state is undefined. .RE .SH ERRORS .sp .LP The \fBmbrlen()\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 Invalid character sequence is detected. .RE .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 NOTES below _ StandardSee \fBstandards\fR(5). .TE .SH SEE ALSO .sp .LP \fBmbrtowc\fR(3C), \fBmbsinit\fR(3C), \fBsetlocale\fR(3C), \fBattributes\fR(5), \fBenviron\fR(5), \fBstandards\fR(5) .SH NOTES .sp .LP If \fIps\fR is not a null pointer, \fBmbrlen()\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, \fBmbrlen()\fR uses its internal \fBmbstate_t\fR object and the function is Unsafe in multithreaded applications.