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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
commit | 399644e47874bff147afb19c89228901ac39340e (patch) | |
tree | 1c4c0b733f4c16b5783b41bebb19194a9ef62ad1 /man3/wcstombs.3 | |
parent | Initial commit. (diff) | |
download | manpages-399644e47874bff147afb19c89228901ac39340e.tar.xz manpages-399644e47874bff147afb19c89228901ac39340e.zip |
Adding upstream version 6.05.01.upstream/6.05.01
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man3/wcstombs.3')
-rw-r--r-- | man3/wcstombs.3 | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/man3/wcstombs.3 b/man3/wcstombs.3 new file mode 100644 index 0000000..a813615 --- /dev/null +++ b/man3/wcstombs.3 @@ -0,0 +1,126 @@ +'\" t +.\" Copyright (c) Bruno Haible <haible@clisp.cons.org> +.\" +.\" SPDX-License-Identifier: GPL-2.0-or-later +.\" +.\" References consulted: +.\" GNU glibc-2 source code and manual +.\" Dinkumware C library reference http://www.dinkumware.com/ +.\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html +.\" ISO/IEC 9899:1999 +.\" +.TH wcstombs 3 2023-07-20 "Linux man-pages 6.05.01" +.SH NAME +wcstombs \- convert a wide-character string to a multibyte string +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.nf +.B #include <stdlib.h> +.PP +.BI "size_t wcstombs(char " dest "[restrict ." n "], \ +const wchar_t *restrict " src , +.BI " size_t " n ); +.fi +.SH DESCRIPTION +If +.I dest +is not NULL, the +.BR wcstombs () +function converts +the wide-character string +.I src +to a multibyte string starting at +.IR dest . +At most +.I n +bytes are written to +.IR dest . +The sequence of characters placed in +.I dest +begins in the initial shift state. +The conversion can stop for three reasons: +.IP \[bu] 3 +A wide character has been encountered that can not be represented as a +multibyte sequence (according to the current locale). +In this case, +.I (size_t)\ \-1 +is returned. +.IP \[bu] +The length limit forces a stop. +In this case, the number of bytes written to +.I dest +is returned, but the shift state at this point is lost. +.IP \[bu] +The wide-character string has been completely converted, including the +terminating null wide character (L\[aq]\e0\[aq]). +In this case, the conversion ends in the initial shift state. +The number of bytes written to +.IR dest , +excluding the terminating null byte (\[aq]\e0\[aq]), is returned. +.PP +The programmer must ensure that there is room for at least +.I n +bytes +at +.IR dest . +.PP +If +.I dest +is NULL, +.I n +is ignored, and the conversion proceeds as +above, except that the converted bytes are not written out to memory, +and no length limit exists. +.PP +In order to avoid the case 2 above, the programmer should make sure +.I n +is greater than or equal to +.IR "wcstombs(NULL,src,0)+1" . +.SH RETURN VALUE +The +.BR wcstombs () +function returns the number of bytes that make up the +converted part of a multibyte sequence, +not including the terminating null byte. +If a wide character was encountered which could not be +converted, +.I (size_t)\ \-1 +is returned. +.SH ATTRIBUTES +For an explanation of the terms used in this section, see +.BR attributes (7). +.TS +allbox; +lbx lb lb +l l l. +Interface Attribute Value +T{ +.na +.nh +.BR wcstombs () +T} Thread safety MT-Safe +.TE +.sp 1 +.SH VERSIONS +The function +.BR wcsrtombs (3) +provides a better interface to the same functionality. +.SH STANDARDS +C11, POSIX.1-2008. +.SH HISTORY +POSIX.1-2001, C99. +.SH NOTES +The behavior of +.BR wcstombs () +depends on the +.B LC_CTYPE +category of the +current locale. +.SH SEE ALSO +.BR mblen (3), +.BR mbstowcs (3), +.BR mbtowc (3), +.BR wcsrtombs (3), +.BR wctomb (3) |