96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/*-
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* Copyright (c) 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 <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <limits.h>
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#include <rune.h>
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#include <string.h>
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#include <wchar.h>
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/*
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* Emulate the deprecated 4.4BSD sgetrune() function in terms of
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* the ISO C mbrtowc() function.
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*/
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rune_t
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__emulated_sgetrune(const char *string, size_t n, const char **result)
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{
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wchar_t wc;
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size_t nconv;
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/*
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* Pass a NULL conversion state to mbrtowc() since multibyte
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* conversion states are not supported.
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*/
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nconv = mbrtowc(&wc, string, n, NULL);
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if (nconv == (size_t)-2) {
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if (result != NULL)
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*result = string;
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return (_INVALID_RUNE);
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}
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if (nconv == (size_t)-1) {
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if (result != NULL)
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*result = string + 1;
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return (_INVALID_RUNE);
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}
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if (nconv == 0)
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nconv = 1;
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if (result != NULL)
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*result = string + nconv;
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return ((rune_t)wc);
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}
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/*
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* Emulate the deprecated 4.4BSD sputrune() function in terms of
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* the ISO C wcrtomb() function.
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*/
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int
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__emulated_sputrune(rune_t rune, char *string, size_t n, char **result)
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{
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char buf[MB_LEN_MAX];
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size_t nconv;
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nconv = wcrtomb(buf, (wchar_t)rune, NULL);
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if (nconv == (size_t)-1) {
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if (result != NULL)
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*result = NULL;
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return (0);
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}
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if (string == NULL) {
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if (result != NULL)
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*result = (char *)0 + nconv;
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} else if (n >= nconv) {
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memcpy(string, buf, nconv);
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if (result != NULL)
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*result = string + nconv;
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} else {
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if (result != NULL)
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*result = NULL;
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}
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return (nconv);
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}
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