3d7a0d9b08
This replaces a partial set of non-functional functions with a complete set of functions, all of which actually work. This requires us to implement mbsnrtowcs and wcsnrtombs which completes the set of what we need for libc++. The mbsnrtowcs is basically a copy & paste of wcsnrtombs, but I'm going to go straight to looking at using the OpenBSD UTF-8 implementation rather than keep polishing our home-grown turd. (This patch also opportunistically switches us over to upstream btowc, mbrlen, and wctob, since they're all trivially expressed in terms of other functions.) Change-Id: I0f81443840de0f1aa73b96f0b51988976793a323
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/* $OpenBSD: btowc.c,v 1.2 2012/12/05 23:20:00 deraadt Exp $ */
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/*-
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* Copyright (c) 2002, 2003 Tim J. Robbins.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <wchar.h>
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wint_t
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btowc(int c)
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{
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mbstate_t mbs;
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char cc;
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wchar_t wc;
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if (c == EOF)
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return (WEOF);
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/*
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* We expect mbrtowc() to return 0 or 1, hence the check for n > 1
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* which detects error return values as well as "impossible" byte
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* counts.
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*/
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memset(&mbs, 0, sizeof(mbs));
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cc = (char)c;
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if (mbrtowc(&wc, &cc, 1, &mbs) > 1)
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return (WEOF);
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return (wc);
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}
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