bf4f4bd221
The mbtoc(3) and wctomb(3) functions use internal state which may be tainted before the call to strvis(3). In this context we can just use the thread-safe versions mbrtoc(3) and wcrtomb(3) which allow passing our own state from our stack. MFC after: 2 weeks Sponsored by: Dell EMC Isilon
767 lines
19 KiB
C
767 lines
19 KiB
C
/* $NetBSD: vis.c,v 1.71 2016/01/14 20:41:23 christos Exp $ */
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/*-
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. 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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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/*-
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* Copyright (c) 1999, 2005 The NetBSD Foundation, Inc.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: vis.c,v 1.71 2016/01/14 20:41:23 christos Exp $");
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#endif /* LIBC_SCCS and not lint */
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#ifdef __FBSDID
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__FBSDID("$FreeBSD$");
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#define _DIAGASSERT(x) assert(x)
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#endif
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <assert.h>
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#include <vis.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <wchar.h>
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#include <wctype.h>
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#ifdef __weak_alias
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__weak_alias(strvisx,_strvisx)
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#endif
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#if !HAVE_VIS || !HAVE_SVIS
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#include <ctype.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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/*
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* The reason for going through the trouble to deal with character encodings
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* in vis(3), is that we use this to safe encode output of commands. This
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* safe encoding varies depending on the character set. For example if we
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* display ps output in French, we don't want to display French characters
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* as M-foo.
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*/
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static wchar_t *do_svis(wchar_t *, wint_t, int, wint_t, const wchar_t *);
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#undef BELL
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#define BELL L'\a'
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#if defined(LC_C_LOCALE)
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#define iscgraph(c) isgraph_l(c, LC_C_LOCALE)
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#else
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/* Keep it simple for now, no locale stuff */
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#define iscgraph(c) isgraph(c)
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#ifdef notyet
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#include <locale.h>
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static int
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iscgraph(int c) {
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int rv;
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char *ol;
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ol = setlocale(LC_CTYPE, "C");
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rv = isgraph(c);
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if (ol)
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setlocale(LC_CTYPE, ol);
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return rv;
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}
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#endif
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#endif
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#define ISGRAPH(flags, c) \
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(((flags) & VIS_NOLOCALE) ? iscgraph(c) : iswgraph(c))
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#define iswoctal(c) (((u_char)(c)) >= L'0' && ((u_char)(c)) <= L'7')
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#define iswwhite(c) (c == L' ' || c == L'\t' || c == L'\n')
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#define iswsafe(c) (c == L'\b' || c == BELL || c == L'\r')
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#define xtoa(c) L"0123456789abcdef"[c]
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#define XTOA(c) L"0123456789ABCDEF"[c]
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#define MAXEXTRAS 30
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static const wchar_t char_shell[] = L"'`\";&<>()|{}]\\$!^~";
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static const wchar_t char_glob[] = L"*?[#";
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#if !HAVE_NBTOOL_CONFIG_H
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#ifndef __NetBSD__
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/*
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* On NetBSD MB_LEN_MAX is currently 32 which does not fit on any integer
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* integral type and it is probably wrong, since currently the maximum
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* number of bytes and character needs is 6. Until this is fixed, the
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* loops below are using sizeof(uint64_t) - 1 instead of MB_LEN_MAX, and
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* the assertion is commented out.
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*/
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#ifdef __FreeBSD__
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/*
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* On FreeBSD including <sys/systm.h> for CTASSERT only works in kernel
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* mode.
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*/
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#ifndef CTASSERT
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#define CTASSERT(x) _CTASSERT(x, __LINE__)
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#define _CTASSERT(x, y) __CTASSERT(x, y)
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#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
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#endif
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#endif /* __FreeBSD__ */
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CTASSERT(MB_LEN_MAX <= sizeof(uint64_t));
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#endif /* !__NetBSD__ */
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#endif
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/*
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* This is do_hvis, for HTTP style (RFC 1808)
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*/
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static wchar_t *
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do_hvis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra)
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{
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if (iswalnum(c)
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/* safe */
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|| c == L'$' || c == L'-' || c == L'_' || c == L'.' || c == L'+'
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/* extra */
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|| c == L'!' || c == L'*' || c == L'\'' || c == L'(' || c == L')'
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|| c == L',')
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dst = do_svis(dst, c, flags, nextc, extra);
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else {
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*dst++ = L'%';
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*dst++ = xtoa(((unsigned int)c >> 4) & 0xf);
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*dst++ = xtoa((unsigned int)c & 0xf);
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}
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return dst;
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}
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/*
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* This is do_mvis, for Quoted-Printable MIME (RFC 2045)
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* NB: No handling of long lines or CRLF.
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*/
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static wchar_t *
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do_mvis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra)
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{
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if ((c != L'\n') &&
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/* Space at the end of the line */
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((iswspace(c) && (nextc == L'\r' || nextc == L'\n')) ||
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/* Out of range */
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(!iswspace(c) && (c < 33 || (c > 60 && c < 62) || c > 126)) ||
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/* Specific char to be escaped */
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wcschr(L"#$@[\\]^`{|}~", c) != NULL)) {
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*dst++ = L'=';
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*dst++ = XTOA(((unsigned int)c >> 4) & 0xf);
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*dst++ = XTOA((unsigned int)c & 0xf);
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} else
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dst = do_svis(dst, c, flags, nextc, extra);
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return dst;
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}
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/*
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* Output single byte of multibyte character.
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*/
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static wchar_t *
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do_mbyte(wchar_t *dst, wint_t c, int flags, wint_t nextc, int iswextra)
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{
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if (flags & VIS_CSTYLE) {
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switch (c) {
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case L'\n':
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*dst++ = L'\\'; *dst++ = L'n';
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return dst;
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case L'\r':
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*dst++ = L'\\'; *dst++ = L'r';
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return dst;
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case L'\b':
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*dst++ = L'\\'; *dst++ = L'b';
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return dst;
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case BELL:
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*dst++ = L'\\'; *dst++ = L'a';
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return dst;
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case L'\v':
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*dst++ = L'\\'; *dst++ = L'v';
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return dst;
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case L'\t':
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*dst++ = L'\\'; *dst++ = L't';
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return dst;
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case L'\f':
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*dst++ = L'\\'; *dst++ = L'f';
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return dst;
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case L' ':
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*dst++ = L'\\'; *dst++ = L's';
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return dst;
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case L'\0':
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*dst++ = L'\\'; *dst++ = L'0';
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if (iswoctal(nextc)) {
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*dst++ = L'0';
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*dst++ = L'0';
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}
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return dst;
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/* We cannot encode these characters in VIS_CSTYLE
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* because they special meaning */
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case L'n':
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case L'r':
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case L'b':
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case L'a':
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case L'v':
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case L't':
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case L'f':
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case L's':
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case L'0':
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case L'M':
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case L'^':
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case L'$': /* vis(1) -l */
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break;
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default:
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if (ISGRAPH(flags, c) && !iswoctal(c)) {
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*dst++ = L'\\';
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*dst++ = c;
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return dst;
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}
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}
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}
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if (iswextra || ((c & 0177) == L' ') || (flags & VIS_OCTAL)) {
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*dst++ = L'\\';
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*dst++ = (u_char)(((u_int32_t)(u_char)c >> 6) & 03) + L'0';
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*dst++ = (u_char)(((u_int32_t)(u_char)c >> 3) & 07) + L'0';
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*dst++ = (c & 07) + L'0';
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} else {
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if ((flags & VIS_NOSLASH) == 0)
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*dst++ = L'\\';
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if (c & 0200) {
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c &= 0177;
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*dst++ = L'M';
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}
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if (iswcntrl(c)) {
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*dst++ = L'^';
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if (c == 0177)
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*dst++ = L'?';
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else
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*dst++ = c + L'@';
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} else {
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*dst++ = L'-';
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*dst++ = c;
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}
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}
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return dst;
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}
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/*
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* This is do_vis, the central code of vis.
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* dst: Pointer to the destination buffer
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* c: Character to encode
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* flags: Flags word
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* nextc: The character following 'c'
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* extra: Pointer to the list of extra characters to be
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* backslash-protected.
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*/
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static wchar_t *
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do_svis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra)
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{
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int iswextra, i, shft;
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uint64_t bmsk, wmsk;
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iswextra = wcschr(extra, c) != NULL;
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if (!iswextra && (ISGRAPH(flags, c) || iswwhite(c) ||
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((flags & VIS_SAFE) && iswsafe(c)))) {
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*dst++ = c;
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return dst;
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}
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/* See comment in istrsenvisx() output loop, below. */
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wmsk = 0;
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for (i = sizeof(wmsk) - 1; i >= 0; i--) {
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shft = i * NBBY;
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bmsk = (uint64_t)0xffLL << shft;
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wmsk |= bmsk;
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if ((c & wmsk) || i == 0)
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dst = do_mbyte(dst, (wint_t)(
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(uint64_t)(c & bmsk) >> shft),
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flags, nextc, iswextra);
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}
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return dst;
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}
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typedef wchar_t *(*visfun_t)(wchar_t *, wint_t, int, wint_t, const wchar_t *);
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/*
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* Return the appropriate encoding function depending on the flags given.
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*/
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static visfun_t
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getvisfun(int flags)
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{
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if (flags & VIS_HTTPSTYLE)
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return do_hvis;
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if (flags & VIS_MIMESTYLE)
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return do_mvis;
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return do_svis;
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}
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/*
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* Expand list of extra characters to not visually encode.
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*/
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static wchar_t *
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makeextralist(int flags, const char *src)
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{
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wchar_t *dst, *d;
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size_t len;
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const wchar_t *s;
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mbstate_t mbstate;
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bzero(&mbstate, sizeof(mbstate));
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len = strlen(src);
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if ((dst = calloc(len + MAXEXTRAS, sizeof(*dst))) == NULL)
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return NULL;
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if ((flags & VIS_NOLOCALE) || mbsrtowcs(dst, &src, len, &mbstate) == (size_t)-1) {
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size_t i;
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for (i = 0; i < len; i++)
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dst[i] = (wchar_t)(u_char)src[i];
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d = dst + len;
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} else
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d = dst + wcslen(dst);
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if (flags & VIS_GLOB)
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for (s = char_glob; *s; *d++ = *s++)
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continue;
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if (flags & VIS_SHELL)
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for (s = char_shell; *s; *d++ = *s++)
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continue;
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if (flags & VIS_SP) *d++ = L' ';
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if (flags & VIS_TAB) *d++ = L'\t';
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if (flags & VIS_NL) *d++ = L'\n';
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if ((flags & VIS_NOSLASH) == 0) *d++ = L'\\';
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*d = L'\0';
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return dst;
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}
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/*
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* istrsenvisx()
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* The main internal function.
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* All user-visible functions call this one.
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*/
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static int
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istrsenvisx(char **mbdstp, size_t *dlen, const char *mbsrc, size_t mblength,
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int flags, const char *mbextra, int *cerr_ptr)
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{
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wchar_t *dst, *src, *pdst, *psrc, *start, *extra;
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size_t len, olen;
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uint64_t bmsk, wmsk;
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wint_t c;
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visfun_t f;
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int clen = 0, cerr, error = -1, i, shft;
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char *mbdst, *mdst;
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ssize_t mbslength, maxolen;
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mbstate_t mbstate;
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_DIAGASSERT(mbdstp != NULL);
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_DIAGASSERT(mbsrc != NULL || mblength == 0);
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_DIAGASSERT(mbextra != NULL);
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/*
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* Input (mbsrc) is a char string considered to be multibyte
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* characters. The input loop will read this string pulling
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* one character, possibly multiple bytes, from mbsrc and
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* converting each to wchar_t in src.
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*
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* The vis conversion will be done using the wide char
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* wchar_t string.
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*
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* This will then be converted back to a multibyte string to
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* return to the caller.
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*/
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/* Allocate space for the wide char strings */
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psrc = pdst = extra = NULL;
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mdst = NULL;
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if ((psrc = calloc(mblength + 1, sizeof(*psrc))) == NULL)
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return -1;
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if ((pdst = calloc((4 * mblength) + 1, sizeof(*pdst))) == NULL)
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goto out;
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if (*mbdstp == NULL) {
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if ((mdst = calloc((4 * mblength) + 1, sizeof(*mdst))) == NULL)
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goto out;
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*mbdstp = mdst;
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}
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mbdst = *mbdstp;
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dst = pdst;
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src = psrc;
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if (flags & VIS_NOLOCALE) {
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/* Do one byte at a time conversion */
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cerr = 1;
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} else {
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/* Use caller's multibyte conversion error flag. */
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cerr = cerr_ptr ? *cerr_ptr : 0;
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}
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/*
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* Input loop.
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* Handle up to mblength characters (not bytes). We do not
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* stop at NULs because we may be processing a block of data
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* that includes NULs.
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*/
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mbslength = (ssize_t)mblength;
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/*
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* When inputing a single character, must also read in the
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* next character for nextc, the look-ahead character.
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*/
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if (mbslength == 1)
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mbslength++;
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bzero(&mbstate, sizeof(mbstate));
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while (mbslength > 0) {
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/* Convert one multibyte character to wchar_t. */
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if (!cerr)
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clen = mbrtowc(src, mbsrc, MB_LEN_MAX, &mbstate);
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if (cerr || clen < 0) {
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/* Conversion error, process as a byte instead. */
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*src = (wint_t)(u_char)*mbsrc;
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clen = 1;
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cerr = 1;
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}
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if (clen == 0)
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/*
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* NUL in input gives 0 return value. process
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* as single NUL byte and keep going.
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*/
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clen = 1;
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/* Advance buffer character pointer. */
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src++;
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/* Advance input pointer by number of bytes read. */
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mbsrc += clen;
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/* Decrement input byte count. */
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mbslength -= clen;
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}
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|
len = src - psrc;
|
|
src = psrc;
|
|
/*
|
|
* In the single character input case, we will have actually
|
|
* processed two characters, c and nextc. Reset len back to
|
|
* just a single character.
|
|
*/
|
|
if (mblength < len)
|
|
len = mblength;
|
|
|
|
/* Convert extra argument to list of characters for this mode. */
|
|
extra = makeextralist(flags, mbextra);
|
|
if (!extra) {
|
|
if (dlen && *dlen == 0) {
|
|
errno = ENOSPC;
|
|
goto out;
|
|
}
|
|
*mbdst = '\0'; /* can't create extra, return "" */
|
|
error = 0;
|
|
goto out;
|
|
}
|
|
|
|
/* Look up which processing function to call. */
|
|
f = getvisfun(flags);
|
|
|
|
/*
|
|
* Main processing loop.
|
|
* Call do_Xvis processing function one character at a time
|
|
* with next character available for look-ahead.
|
|
*/
|
|
for (start = dst; len > 0; len--) {
|
|
c = *src++;
|
|
dst = (*f)(dst, c, flags, len >= 1 ? *src : L'\0', extra);
|
|
if (dst == NULL) {
|
|
errno = ENOSPC;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* Terminate the string in the buffer. */
|
|
*dst = L'\0';
|
|
|
|
/*
|
|
* Output loop.
|
|
* Convert wchar_t string back to multibyte output string.
|
|
* If we have hit a multi-byte conversion error on input,
|
|
* output byte-by-byte here. Else use wctomb().
|
|
*/
|
|
len = wcslen(start);
|
|
maxolen = dlen ? *dlen : (wcslen(start) * MB_LEN_MAX + 1);
|
|
olen = 0;
|
|
bzero(&mbstate, sizeof(mbstate));
|
|
for (dst = start; len > 0; len--) {
|
|
if (!cerr)
|
|
clen = wcrtomb(mbdst, *dst, &mbstate);
|
|
if (cerr || clen < 0) {
|
|
/*
|
|
* Conversion error, process as a byte(s) instead.
|
|
* Examine each byte and higher-order bytes for
|
|
* data. E.g.,
|
|
* 0x000000000000a264 -> a2 64
|
|
* 0x000000001f00a264 -> 1f 00 a2 64
|
|
*/
|
|
clen = 0;
|
|
wmsk = 0;
|
|
for (i = sizeof(wmsk) - 1; i >= 0; i--) {
|
|
shft = i * NBBY;
|
|
bmsk = (uint64_t)0xffLL << shft;
|
|
wmsk |= bmsk;
|
|
if ((*dst & wmsk) || i == 0)
|
|
mbdst[clen++] = (char)(
|
|
(uint64_t)(*dst & bmsk) >>
|
|
shft);
|
|
}
|
|
cerr = 1;
|
|
}
|
|
/* If this character would exceed our output limit, stop. */
|
|
if (olen + clen > (size_t)maxolen)
|
|
break;
|
|
/* Advance output pointer by number of bytes written. */
|
|
mbdst += clen;
|
|
/* Advance buffer character pointer. */
|
|
dst++;
|
|
/* Incrment output character count. */
|
|
olen += clen;
|
|
}
|
|
|
|
/* Terminate the output string. */
|
|
*mbdst = '\0';
|
|
|
|
if (flags & VIS_NOLOCALE) {
|
|
/* Pass conversion error flag out. */
|
|
if (cerr_ptr)
|
|
*cerr_ptr = cerr;
|
|
}
|
|
|
|
free(extra);
|
|
free(pdst);
|
|
free(psrc);
|
|
|
|
return (int)olen;
|
|
out:
|
|
free(extra);
|
|
free(pdst);
|
|
free(psrc);
|
|
free(mdst);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
istrsenvisxl(char **mbdstp, size_t *dlen, const char *mbsrc,
|
|
int flags, const char *mbextra, int *cerr_ptr)
|
|
{
|
|
return istrsenvisx(mbdstp, dlen, mbsrc,
|
|
mbsrc != NULL ? strlen(mbsrc) : 0, flags, mbextra, cerr_ptr);
|
|
}
|
|
|
|
#endif
|
|
|
|
#if !HAVE_SVIS
|
|
/*
|
|
* The "svis" variants all take an "extra" arg that is a pointer
|
|
* to a NUL-terminated list of characters to be encoded, too.
|
|
* These functions are useful e. g. to encode strings in such a
|
|
* way so that they are not interpreted by a shell.
|
|
*/
|
|
|
|
char *
|
|
svis(char *mbdst, int c, int flags, int nextc, const char *mbextra)
|
|
{
|
|
char cc[2];
|
|
int ret;
|
|
|
|
cc[0] = c;
|
|
cc[1] = nextc;
|
|
|
|
ret = istrsenvisx(&mbdst, NULL, cc, 1, flags, mbextra, NULL);
|
|
if (ret < 0)
|
|
return NULL;
|
|
return mbdst + ret;
|
|
}
|
|
|
|
char *
|
|
snvis(char *mbdst, size_t dlen, int c, int flags, int nextc, const char *mbextra)
|
|
{
|
|
char cc[2];
|
|
int ret;
|
|
|
|
cc[0] = c;
|
|
cc[1] = nextc;
|
|
|
|
ret = istrsenvisx(&mbdst, &dlen, cc, 1, flags, mbextra, NULL);
|
|
if (ret < 0)
|
|
return NULL;
|
|
return mbdst + ret;
|
|
}
|
|
|
|
int
|
|
strsvis(char *mbdst, const char *mbsrc, int flags, const char *mbextra)
|
|
{
|
|
return istrsenvisxl(&mbdst, NULL, mbsrc, flags, mbextra, NULL);
|
|
}
|
|
|
|
int
|
|
strsnvis(char *mbdst, size_t dlen, const char *mbsrc, int flags, const char *mbextra)
|
|
{
|
|
return istrsenvisxl(&mbdst, &dlen, mbsrc, flags, mbextra, NULL);
|
|
}
|
|
|
|
int
|
|
strsvisx(char *mbdst, const char *mbsrc, size_t len, int flags, const char *mbextra)
|
|
{
|
|
return istrsenvisx(&mbdst, NULL, mbsrc, len, flags, mbextra, NULL);
|
|
}
|
|
|
|
int
|
|
strsnvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags,
|
|
const char *mbextra)
|
|
{
|
|
return istrsenvisx(&mbdst, &dlen, mbsrc, len, flags, mbextra, NULL);
|
|
}
|
|
|
|
int
|
|
strsenvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags,
|
|
const char *mbextra, int *cerr_ptr)
|
|
{
|
|
return istrsenvisx(&mbdst, &dlen, mbsrc, len, flags, mbextra, cerr_ptr);
|
|
}
|
|
#endif
|
|
|
|
#if !HAVE_VIS
|
|
/*
|
|
* vis - visually encode characters
|
|
*/
|
|
char *
|
|
vis(char *mbdst, int c, int flags, int nextc)
|
|
{
|
|
char cc[2];
|
|
int ret;
|
|
|
|
cc[0] = c;
|
|
cc[1] = nextc;
|
|
|
|
ret = istrsenvisx(&mbdst, NULL, cc, 1, flags, "", NULL);
|
|
if (ret < 0)
|
|
return NULL;
|
|
return mbdst + ret;
|
|
}
|
|
|
|
char *
|
|
nvis(char *mbdst, size_t dlen, int c, int flags, int nextc)
|
|
{
|
|
char cc[2];
|
|
int ret;
|
|
|
|
cc[0] = c;
|
|
cc[1] = nextc;
|
|
|
|
ret = istrsenvisx(&mbdst, &dlen, cc, 1, flags, "", NULL);
|
|
if (ret < 0)
|
|
return NULL;
|
|
return mbdst + ret;
|
|
}
|
|
|
|
/*
|
|
* strvis - visually encode characters from src into dst
|
|
*
|
|
* Dst must be 4 times the size of src to account for possible
|
|
* expansion. The length of dst, not including the trailing NULL,
|
|
* is returned.
|
|
*/
|
|
|
|
int
|
|
strvis(char *mbdst, const char *mbsrc, int flags)
|
|
{
|
|
return istrsenvisxl(&mbdst, NULL, mbsrc, flags, "", NULL);
|
|
}
|
|
|
|
int
|
|
strnvis(char *mbdst, size_t dlen, const char *mbsrc, int flags)
|
|
{
|
|
return istrsenvisxl(&mbdst, &dlen, mbsrc, flags, "", NULL);
|
|
}
|
|
|
|
int
|
|
stravis(char **mbdstp, const char *mbsrc, int flags)
|
|
{
|
|
*mbdstp = NULL;
|
|
return istrsenvisxl(mbdstp, NULL, mbsrc, flags, "", NULL);
|
|
}
|
|
|
|
/*
|
|
* strvisx - visually encode characters from src into dst
|
|
*
|
|
* Dst must be 4 times the size of src to account for possible
|
|
* expansion. The length of dst, not including the trailing NULL,
|
|
* is returned.
|
|
*
|
|
* Strvisx encodes exactly len characters from src into dst.
|
|
* This is useful for encoding a block of data.
|
|
*/
|
|
|
|
int
|
|
strvisx(char *mbdst, const char *mbsrc, size_t len, int flags)
|
|
{
|
|
return istrsenvisx(&mbdst, NULL, mbsrc, len, flags, "", NULL);
|
|
}
|
|
|
|
int
|
|
strnvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags)
|
|
{
|
|
return istrsenvisx(&mbdst, &dlen, mbsrc, len, flags, "", NULL);
|
|
}
|
|
|
|
int
|
|
strenvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags,
|
|
int *cerr_ptr)
|
|
{
|
|
return istrsenvisx(&mbdst, &dlen, mbsrc, len, flags, "", cerr_ptr);
|
|
}
|
|
#endif
|