f0a6d7e204
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 $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/*-
|
|
* Copyright (c) 1999, 2005 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
__RCSID("$NetBSD: vis.c,v 1.71 2016/01/14 20:41:23 christos Exp $");
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#ifdef __FBSDID
|
|
__FBSDID("$FreeBSD$");
|
|
#define _DIAGASSERT(x) assert(x)
|
|
#endif
|
|
|
|
#include "namespace.h"
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
|
|
#include <assert.h>
|
|
#include <vis.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <wchar.h>
|
|
#include <wctype.h>
|
|
|
|
#ifdef __weak_alias
|
|
__weak_alias(strvisx,_strvisx)
|
|
#endif
|
|
|
|
#if !HAVE_VIS || !HAVE_SVIS
|
|
#include <ctype.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
/*
|
|
* The reason for going through the trouble to deal with character encodings
|
|
* in vis(3), is that we use this to safe encode output of commands. This
|
|
* safe encoding varies depending on the character set. For example if we
|
|
* display ps output in French, we don't want to display French characters
|
|
* as M-foo.
|
|
*/
|
|
|
|
static wchar_t *do_svis(wchar_t *, wint_t, int, wint_t, const wchar_t *);
|
|
|
|
#undef BELL
|
|
#define BELL L'\a'
|
|
|
|
#if defined(LC_C_LOCALE)
|
|
#define iscgraph(c) isgraph_l(c, LC_C_LOCALE)
|
|
#else
|
|
/* Keep it simple for now, no locale stuff */
|
|
#define iscgraph(c) isgraph(c)
|
|
#ifdef notyet
|
|
#include <locale.h>
|
|
static int
|
|
iscgraph(int c) {
|
|
int rv;
|
|
char *ol;
|
|
|
|
ol = setlocale(LC_CTYPE, "C");
|
|
rv = isgraph(c);
|
|
if (ol)
|
|
setlocale(LC_CTYPE, ol);
|
|
return rv;
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
#define ISGRAPH(flags, c) \
|
|
(((flags) & VIS_NOLOCALE) ? iscgraph(c) : iswgraph(c))
|
|
|
|
#define iswoctal(c) (((u_char)(c)) >= L'0' && ((u_char)(c)) <= L'7')
|
|
#define iswwhite(c) (c == L' ' || c == L'\t' || c == L'\n')
|
|
#define iswsafe(c) (c == L'\b' || c == BELL || c == L'\r')
|
|
#define xtoa(c) L"0123456789abcdef"[c]
|
|
#define XTOA(c) L"0123456789ABCDEF"[c]
|
|
|
|
#define MAXEXTRAS 30
|
|
|
|
static const wchar_t char_shell[] = L"'`\";&<>()|{}]\\$!^~";
|
|
static const wchar_t char_glob[] = L"*?[#";
|
|
|
|
#if !HAVE_NBTOOL_CONFIG_H
|
|
#ifndef __NetBSD__
|
|
/*
|
|
* On NetBSD MB_LEN_MAX is currently 32 which does not fit on any integer
|
|
* integral type and it is probably wrong, since currently the maximum
|
|
* number of bytes and character needs is 6. Until this is fixed, the
|
|
* loops below are using sizeof(uint64_t) - 1 instead of MB_LEN_MAX, and
|
|
* the assertion is commented out.
|
|
*/
|
|
#ifdef __FreeBSD__
|
|
/*
|
|
* On FreeBSD including <sys/systm.h> for CTASSERT only works in kernel
|
|
* mode.
|
|
*/
|
|
#ifndef CTASSERT
|
|
#define CTASSERT(x) _CTASSERT(x, __LINE__)
|
|
#define _CTASSERT(x, y) __CTASSERT(x, y)
|
|
#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
|
|
#endif
|
|
#endif /* __FreeBSD__ */
|
|
CTASSERT(MB_LEN_MAX <= sizeof(uint64_t));
|
|
#endif /* !__NetBSD__ */
|
|
#endif
|
|
|
|
/*
|
|
* This is do_hvis, for HTTP style (RFC 1808)
|
|
*/
|
|
static wchar_t *
|
|
do_hvis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra)
|
|
{
|
|
if (iswalnum(c)
|
|
/* safe */
|
|
|| c == L'$' || c == L'-' || c == L'_' || c == L'.' || c == L'+'
|
|
/* extra */
|
|
|| c == L'!' || c == L'*' || c == L'\'' || c == L'(' || c == L')'
|
|
|| c == L',')
|
|
dst = do_svis(dst, c, flags, nextc, extra);
|
|
else {
|
|
*dst++ = L'%';
|
|
*dst++ = xtoa(((unsigned int)c >> 4) & 0xf);
|
|
*dst++ = xtoa((unsigned int)c & 0xf);
|
|
}
|
|
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* This is do_mvis, for Quoted-Printable MIME (RFC 2045)
|
|
* NB: No handling of long lines or CRLF.
|
|
*/
|
|
static wchar_t *
|
|
do_mvis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra)
|
|
{
|
|
if ((c != L'\n') &&
|
|
/* Space at the end of the line */
|
|
((iswspace(c) && (nextc == L'\r' || nextc == L'\n')) ||
|
|
/* Out of range */
|
|
(!iswspace(c) && (c < 33 || (c > 60 && c < 62) || c > 126)) ||
|
|
/* Specific char to be escaped */
|
|
wcschr(L"#$@[\\]^`{|}~", c) != NULL)) {
|
|
*dst++ = L'=';
|
|
*dst++ = XTOA(((unsigned int)c >> 4) & 0xf);
|
|
*dst++ = XTOA((unsigned int)c & 0xf);
|
|
} else
|
|
dst = do_svis(dst, c, flags, nextc, extra);
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* Output single byte of multibyte character.
|
|
*/
|
|
static wchar_t *
|
|
do_mbyte(wchar_t *dst, wint_t c, int flags, wint_t nextc, int iswextra)
|
|
{
|
|
if (flags & VIS_CSTYLE) {
|
|
switch (c) {
|
|
case L'\n':
|
|
*dst++ = L'\\'; *dst++ = L'n';
|
|
return dst;
|
|
case L'\r':
|
|
*dst++ = L'\\'; *dst++ = L'r';
|
|
return dst;
|
|
case L'\b':
|
|
*dst++ = L'\\'; *dst++ = L'b';
|
|
return dst;
|
|
case BELL:
|
|
*dst++ = L'\\'; *dst++ = L'a';
|
|
return dst;
|
|
case L'\v':
|
|
*dst++ = L'\\'; *dst++ = L'v';
|
|
return dst;
|
|
case L'\t':
|
|
*dst++ = L'\\'; *dst++ = L't';
|
|
return dst;
|
|
case L'\f':
|
|
*dst++ = L'\\'; *dst++ = L'f';
|
|
return dst;
|
|
case L' ':
|
|
*dst++ = L'\\'; *dst++ = L's';
|
|
return dst;
|
|
case L'\0':
|
|
*dst++ = L'\\'; *dst++ = L'0';
|
|
if (iswoctal(nextc)) {
|
|
*dst++ = L'0';
|
|
*dst++ = L'0';
|
|
}
|
|
return dst;
|
|
/* We cannot encode these characters in VIS_CSTYLE
|
|
* because they special meaning */
|
|
case L'n':
|
|
case L'r':
|
|
case L'b':
|
|
case L'a':
|
|
case L'v':
|
|
case L't':
|
|
case L'f':
|
|
case L's':
|
|
case L'0':
|
|
case L'M':
|
|
case L'^':
|
|
case L'$': /* vis(1) -l */
|
|
break;
|
|
default:
|
|
if (ISGRAPH(flags, c) && !iswoctal(c)) {
|
|
*dst++ = L'\\';
|
|
*dst++ = c;
|
|
return dst;
|
|
}
|
|
}
|
|
}
|
|
if (iswextra || ((c & 0177) == L' ') || (flags & VIS_OCTAL)) {
|
|
*dst++ = L'\\';
|
|
*dst++ = (u_char)(((u_int32_t)(u_char)c >> 6) & 03) + L'0';
|
|
*dst++ = (u_char)(((u_int32_t)(u_char)c >> 3) & 07) + L'0';
|
|
*dst++ = (c & 07) + L'0';
|
|
} else {
|
|
if ((flags & VIS_NOSLASH) == 0)
|
|
*dst++ = L'\\';
|
|
|
|
if (c & 0200) {
|
|
c &= 0177;
|
|
*dst++ = L'M';
|
|
}
|
|
|
|
if (iswcntrl(c)) {
|
|
*dst++ = L'^';
|
|
if (c == 0177)
|
|
*dst++ = L'?';
|
|
else
|
|
*dst++ = c + L'@';
|
|
} else {
|
|
*dst++ = L'-';
|
|
*dst++ = c;
|
|
}
|
|
}
|
|
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* This is do_vis, the central code of vis.
|
|
* dst: Pointer to the destination buffer
|
|
* c: Character to encode
|
|
* flags: Flags word
|
|
* nextc: The character following 'c'
|
|
* extra: Pointer to the list of extra characters to be
|
|
* backslash-protected.
|
|
*/
|
|
static wchar_t *
|
|
do_svis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra)
|
|
{
|
|
int iswextra, i, shft;
|
|
uint64_t bmsk, wmsk;
|
|
|
|
iswextra = wcschr(extra, c) != NULL;
|
|
if (!iswextra && (ISGRAPH(flags, c) || iswwhite(c) ||
|
|
((flags & VIS_SAFE) && iswsafe(c)))) {
|
|
*dst++ = c;
|
|
return dst;
|
|
}
|
|
|
|
/* See comment in istrsenvisx() output loop, below. */
|
|
wmsk = 0;
|
|
for (i = sizeof(wmsk) - 1; i >= 0; i--) {
|
|
shft = i * NBBY;
|
|
bmsk = (uint64_t)0xffLL << shft;
|
|
wmsk |= bmsk;
|
|
if ((c & wmsk) || i == 0)
|
|
dst = do_mbyte(dst, (wint_t)(
|
|
(uint64_t)(c & bmsk) >> shft),
|
|
flags, nextc, iswextra);
|
|
}
|
|
|
|
return dst;
|
|
}
|
|
|
|
typedef wchar_t *(*visfun_t)(wchar_t *, wint_t, int, wint_t, const wchar_t *);
|
|
|
|
/*
|
|
* Return the appropriate encoding function depending on the flags given.
|
|
*/
|
|
static visfun_t
|
|
getvisfun(int flags)
|
|
{
|
|
if (flags & VIS_HTTPSTYLE)
|
|
return do_hvis;
|
|
if (flags & VIS_MIMESTYLE)
|
|
return do_mvis;
|
|
return do_svis;
|
|
}
|
|
|
|
/*
|
|
* Expand list of extra characters to not visually encode.
|
|
*/
|
|
static wchar_t *
|
|
makeextralist(int flags, const char *src)
|
|
{
|
|
wchar_t *dst, *d;
|
|
size_t len;
|
|
const wchar_t *s;
|
|
mbstate_t mbstate;
|
|
|
|
bzero(&mbstate, sizeof(mbstate));
|
|
len = strlen(src);
|
|
if ((dst = calloc(len + MAXEXTRAS, sizeof(*dst))) == NULL)
|
|
return NULL;
|
|
|
|
if ((flags & VIS_NOLOCALE) || mbsrtowcs(dst, &src, len, &mbstate) == (size_t)-1) {
|
|
size_t i;
|
|
for (i = 0; i < len; i++)
|
|
dst[i] = (wchar_t)(u_char)src[i];
|
|
d = dst + len;
|
|
} else
|
|
d = dst + wcslen(dst);
|
|
|
|
if (flags & VIS_GLOB)
|
|
for (s = char_glob; *s; *d++ = *s++)
|
|
continue;
|
|
|
|
if (flags & VIS_SHELL)
|
|
for (s = char_shell; *s; *d++ = *s++)
|
|
continue;
|
|
|
|
if (flags & VIS_SP) *d++ = L' ';
|
|
if (flags & VIS_TAB) *d++ = L'\t';
|
|
if (flags & VIS_NL) *d++ = L'\n';
|
|
if ((flags & VIS_NOSLASH) == 0) *d++ = L'\\';
|
|
*d = L'\0';
|
|
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* istrsenvisx()
|
|
* The main internal function.
|
|
* All user-visible functions call this one.
|
|
*/
|
|
static int
|
|
istrsenvisx(char **mbdstp, size_t *dlen, const char *mbsrc, size_t mblength,
|
|
int flags, const char *mbextra, int *cerr_ptr)
|
|
{
|
|
wchar_t *dst, *src, *pdst, *psrc, *start, *extra;
|
|
size_t len, olen;
|
|
uint64_t bmsk, wmsk;
|
|
wint_t c;
|
|
visfun_t f;
|
|
int clen = 0, cerr, error = -1, i, shft;
|
|
char *mbdst, *mdst;
|
|
ssize_t mbslength, maxolen;
|
|
mbstate_t mbstate;
|
|
|
|
_DIAGASSERT(mbdstp != NULL);
|
|
_DIAGASSERT(mbsrc != NULL || mblength == 0);
|
|
_DIAGASSERT(mbextra != NULL);
|
|
|
|
/*
|
|
* Input (mbsrc) is a char string considered to be multibyte
|
|
* characters. The input loop will read this string pulling
|
|
* one character, possibly multiple bytes, from mbsrc and
|
|
* converting each to wchar_t in src.
|
|
*
|
|
* The vis conversion will be done using the wide char
|
|
* wchar_t string.
|
|
*
|
|
* This will then be converted back to a multibyte string to
|
|
* return to the caller.
|
|
*/
|
|
|
|
/* Allocate space for the wide char strings */
|
|
psrc = pdst = extra = NULL;
|
|
mdst = NULL;
|
|
if ((psrc = calloc(mblength + 1, sizeof(*psrc))) == NULL)
|
|
return -1;
|
|
if ((pdst = calloc((4 * mblength) + 1, sizeof(*pdst))) == NULL)
|
|
goto out;
|
|
if (*mbdstp == NULL) {
|
|
if ((mdst = calloc((4 * mblength) + 1, sizeof(*mdst))) == NULL)
|
|
goto out;
|
|
*mbdstp = mdst;
|
|
}
|
|
|
|
mbdst = *mbdstp;
|
|
dst = pdst;
|
|
src = psrc;
|
|
|
|
if (flags & VIS_NOLOCALE) {
|
|
/* Do one byte at a time conversion */
|
|
cerr = 1;
|
|
} else {
|
|
/* Use caller's multibyte conversion error flag. */
|
|
cerr = cerr_ptr ? *cerr_ptr : 0;
|
|
}
|
|
|
|
/*
|
|
* Input loop.
|
|
* Handle up to mblength characters (not bytes). We do not
|
|
* stop at NULs because we may be processing a block of data
|
|
* that includes NULs.
|
|
*/
|
|
mbslength = (ssize_t)mblength;
|
|
/*
|
|
* When inputing a single character, must also read in the
|
|
* next character for nextc, the look-ahead character.
|
|
*/
|
|
if (mbslength == 1)
|
|
mbslength++;
|
|
bzero(&mbstate, sizeof(mbstate));
|
|
while (mbslength > 0) {
|
|
/* Convert one multibyte character to wchar_t. */
|
|
if (!cerr)
|
|
clen = mbrtowc(src, mbsrc, MB_LEN_MAX, &mbstate);
|
|
if (cerr || clen < 0) {
|
|
/* Conversion error, process as a byte instead. */
|
|
*src = (wint_t)(u_char)*mbsrc;
|
|
clen = 1;
|
|
cerr = 1;
|
|
}
|
|
if (clen == 0)
|
|
/*
|
|
* NUL in input gives 0 return value. process
|
|
* as single NUL byte and keep going.
|
|
*/
|
|
clen = 1;
|
|
/* Advance buffer character pointer. */
|
|
src++;
|
|
/* Advance input pointer by number of bytes read. */
|
|
mbsrc += clen;
|
|
/* Decrement input byte count. */
|
|
mbslength -= clen;
|
|
}
|
|
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
|