mirror of https://github.com/mkerrisk/man-pages
52 lines
1.5 KiB
Groff
52 lines
1.5 KiB
Groff
.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
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.\"
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.\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA)
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.\" This is free documentation; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public License as
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.\" published by the Free Software Foundation; either version 2 of
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.\" the License, or (at your option) any later version.
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.\" %%%LICENSE_END
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.\"
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.\" References consulted:
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.\" GNU glibc-2 source code and manual
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.\" Dinkumware C library reference http://www.dinkumware.com/
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.\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
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.\"
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.\" Modified, aeb, 990824
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.\"
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.TH MB_LEN_MAX 3 2015-07-23 "Linux" "Linux Programmer's Manual"
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.SH NAME
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MB_LEN_MAX \- maximum multibyte length of a character across all locales
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.SH SYNOPSIS
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.nf
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.B #include <limits.h>
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.fi
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.SH DESCRIPTION
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The
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.B MB_LEN_MAX
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macro is the upper bound for the number of bytes needed to represent a single
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wide character, in any of the supported locales.
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.SH RETURN VALUE
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A constant integer greater than zero.
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.SH CONFORMING TO
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POSIX.1-2001, POSIX.1-2008, C99.
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.SH NOTES
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The entities
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.B MB_LEN_MAX
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and
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.I sizeof(wchar_t)
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are totally unrelated.
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In glibc,
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.B MB_LEN_MAX
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is typically 16
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.\" For an explanation of why the limit was raised to 16, see
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.\" http://lists.gnu.org/archive/html/bug-gnulib/2015-05/msg00001.html
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.\" From: Bruno Haible
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.\" Subject: Re: why is MB_LEN_MAX so large (16) on glibc
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.\" Date: Thu, 14 May 2015 02:30:14 +0200
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(6 in glibc versions earlier than 2.2) while
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.I sizeof(wchar_t)
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is 4.
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.SH SEE ALSO
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.BR MB_CUR_MAX (3)
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