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diff --git a/man-pages-posix-2017/man3p/wctomb.3p b/man-pages-posix-2017/man3p/wctomb.3p new file mode 100644 index 0000000..326e5ec --- /dev/null +++ b/man-pages-posix-2017/man3p/wctomb.3p @@ -0,0 +1,129 @@ +'\" et +.TH WCTOMB "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" +.SH PROLOG +This manual page is part of the POSIX Programmer's Manual. +The Linux implementation of this interface may differ (consult +the corresponding Linux manual page for details of Linux behavior), +or the interface may not be implemented on Linux. +.\" +.SH NAME +wctomb +\(em convert a wide-character code to a character +.SH SYNOPSIS +.LP +.nf +#include <stdlib.h> +.P +int wctomb(char *\fIs\fP, wchar_t \fIwchar\fP); +.fi +.SH DESCRIPTION +The functionality described on this reference page is aligned with the +ISO\ C standard. Any conflict between the requirements described here and the +ISO\ C standard is unintentional. This volume of POSIX.1\(hy2017 defers to the ISO\ C standard. +.P +The +\fIwctomb\fR() +function shall determine the number of bytes needed to represent the +character corresponding to the wide-character code whose value is +.IR wchar +(including any change in the shift state). It shall store the character +representation (possibly multiple bytes and any special bytes to change +shift state) in the array object pointed to by +.IR s +(if +.IR s +is not a null pointer). At most +{MB_CUR_MAX} +bytes shall be stored. If +.IR wchar +is 0, a null byte shall be stored, preceded by any shift sequence +needed to restore the initial shift state, and +\fIwctomb\fR() +shall be left in the initial shift state. +.P +The behavior of this function is affected by the +.IR LC_CTYPE +category of the current locale. For a state-dependent encoding, this +function shall be placed into its initial state by a call for which its +character pointer argument, +.IR s , +is a null pointer. Subsequent calls with +.IR s +as other than a null pointer shall cause the internal state of the +function to be altered as necessary. A call with +.IR s +as a null pointer shall cause this function to return a non-zero value +if encodings have state dependency, and 0 otherwise. Changing the +.IR LC_CTYPE +category causes the shift state of this function to be unspecified. +.P +The +\fIwctomb\fR() +function need not be thread-safe. +.P +The implementation shall behave as if no function defined in this volume of POSIX.1\(hy2017 +calls +\fIwctomb\fR(). +.SH "RETURN VALUE" +If +.IR s +is a null pointer, +\fIwctomb\fR() +shall return a non-zero or 0 value, if character encodings, +respectively, do or do not have state-dependent encodings. If +.IR s +is not a null pointer, +\fIwctomb\fR() +shall return \-1 if the value of +.IR wchar +does not correspond to a valid character, or return the number of +bytes that constitute the character corresponding to the value of +.IR wchar . +.P +In no case shall the value returned be greater than the value of the +{MB_CUR_MAX} +macro. +.SH ERRORS +The +\fIwctomb\fR() +function shall fail if: +.TP +.BR EILSEQ +An invalid wide-character code is detected. +.LP +.IR "The following sections are informative." +.SH EXAMPLES +None. +.SH "APPLICATION USAGE" +None. +.SH RATIONALE +None. +.SH "FUTURE DIRECTIONS" +None. +.SH "SEE ALSO" +.IR "\fImblen\fR\^(\|)", +.IR "\fImbtowc\fR\^(\|)", +.IR "\fImbstowcs\fR\^(\|)", +.IR "\fIwcstombs\fR\^(\|)" +.P +The Base Definitions volume of POSIX.1\(hy2017, +.IR "\fB<stdlib.h>\fP" +.\" +.SH COPYRIGHT +Portions of this text are reprinted and reproduced in electronic form +from IEEE Std 1003.1-2017, Standard for Information Technology +-- Portable Operating System Interface (POSIX), The Open Group Base +Specifications Issue 7, 2018 Edition, +Copyright (C) 2018 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 . +.PP +Any typographical or formatting errors that appear +in this page are most likely +to have been introduced during the conversion of the source files to +man page format. To report such errors, see +https://www.kernel.org/doc/man-pages/reporting_bugs.html . |