mirror of
https://github.com/freebsd/freebsd-src.git
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Vendor import of NetBSD's vis(1) at 2013-02-21
This commit is contained in:
Brooks Davis
commit
7fc1dbca01
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/vendor/NetBSD/vis/dist/; revision=247128 svn path=/vendor/NetBSD/vis/20132102/; revision=247130; tag=vendor/NetBSD/vis/20130221
7
Makefile
Normal file
7
Makefile
Normal file
@ -0,0 +1,7 @@
|
||||
# $NetBSD: Makefile,v 1.3 1994/11/17 07:55:57 jtc Exp $
|
||||
# @(#)Makefile 8.1 (Berkeley) 6/6/93
|
||||
|
||||
PROG= vis
|
||||
SRCS= vis.c foldit.c
|
||||
|
||||
.include <bsd.prog.mk>
|
||||
39
extern.h
Normal file
39
extern.h
Normal file
@ -0,0 +1,39 @@
|
||||
/* $NetBSD: extern.h,v 1.1 2009/02/10 23:06:31 christos Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 2009 The NetBSD Foundation, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to The NetBSD Foundation
|
||||
* by Christos Zoulas.
|
||||
*
|
||||
* 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. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by the NetBSD
|
||||
* Foundation, Inc. and its contributors.
|
||||
* 4. Neither the name of The NetBSD Foundation 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 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.
|
||||
*/
|
||||
|
||||
int foldit(const char *, int, int, int);
|
||||
78
foldit.c
Normal file
78
foldit.c
Normal file
@ -0,0 +1,78 @@
|
||||
/* $NetBSD: foldit.c,v 1.7 2009/02/10 23:06:31 christos Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 1990, 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.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
#ifndef lint
|
||||
#if 0
|
||||
static char sccsid[] = "@(#)foldit.c 8.1 (Berkeley) 6/6/93";
|
||||
#endif
|
||||
__RCSID("$NetBSD: foldit.c,v 1.7 2009/02/10 23:06:31 christos Exp $");
|
||||
#endif /* not lint */
|
||||
|
||||
#include <stdio.h>
|
||||
#include <vis.h>
|
||||
#include "extern.h"
|
||||
|
||||
int
|
||||
foldit(const char *chunk, int col, int max, int flags)
|
||||
{
|
||||
const char *cp;
|
||||
|
||||
/*
|
||||
* Keep track of column position. Insert hidden newline
|
||||
* if this chunk puts us over the limit.
|
||||
*/
|
||||
again:
|
||||
cp = chunk;
|
||||
while (*cp) {
|
||||
switch(*cp) {
|
||||
case '\n':
|
||||
case '\r':
|
||||
col = 0;
|
||||
break;
|
||||
case '\t':
|
||||
col = (col + 8) &~ 07;
|
||||
break;
|
||||
case '\b':
|
||||
col = col ? col - 1 : 0;
|
||||
break;
|
||||
default:
|
||||
col++;
|
||||
}
|
||||
if (col > (max - 2)) {
|
||||
printf(flags & VIS_MIMESTYLE ? "=\n" : "\\\n");
|
||||
col = 0;
|
||||
goto again;
|
||||
}
|
||||
cp++;
|
||||
}
|
||||
return (col);
|
||||
}
|
||||
169
vis.1
Normal file
169
vis.1
Normal file
@ -0,0 +1,169 @@
|
||||
.\" $NetBSD: vis.1,v 1.17 2013/02/14 14:00:00 christos Exp $
|
||||
.\"
|
||||
.\" Copyright (c) 1989, 1991, 1993, 1994
|
||||
.\" 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.
|
||||
.\"
|
||||
.\" @(#)vis.1 8.4 (Berkeley) 4/19/94
|
||||
.\"
|
||||
.Dd February 13, 2013
|
||||
.Dt VIS 1
|
||||
.Os
|
||||
.Sh NAME
|
||||
.Nm vis
|
||||
.Nd display non-printable characters in a visual format
|
||||
.Sh SYNOPSIS
|
||||
.Nm
|
||||
.Op Fl bcfhlmnostw
|
||||
.Op Fl e Ar extra
|
||||
.Op Fl F Ar foldwidth
|
||||
.Op Ar file ...
|
||||
.Sh DESCRIPTION
|
||||
.Nm
|
||||
is a filter for converting non-printable characters
|
||||
into a visual representation.
|
||||
It differs from
|
||||
.Ql cat -v
|
||||
in that
|
||||
the form is unique and invertible.
|
||||
By default, all non-graphic
|
||||
characters except space, tab, and newline are encoded.
|
||||
A detailed description of the
|
||||
various visual formats is given in
|
||||
.Xr vis 3 .
|
||||
.Pp
|
||||
The options are as follows:
|
||||
.Bl -tag -width Ds
|
||||
.It Fl b
|
||||
Turns off prepending of backslash before up-arrow control sequences
|
||||
and meta characters, and disables the doubling of backslashes.
|
||||
This
|
||||
produces output which is neither invertible or precise, but does
|
||||
represent a minimum of change to the input.
|
||||
It is similar to
|
||||
.Dq Li cat -v .
|
||||
.Pq Dv VIS_NOSLASH
|
||||
.It Fl c
|
||||
Request a format which displays a small subset of the
|
||||
non-printable characters using C-style backslash sequences.
|
||||
.Pq Dv VIS_CSTYLE
|
||||
.It Fl e Ar extra
|
||||
Also encode characters in
|
||||
.Ar extra ,
|
||||
per
|
||||
.Xr svis 3 .
|
||||
.It Fl F Ar foldwidth
|
||||
Causes
|
||||
.Nm
|
||||
to fold output lines to foldwidth columns (default 80), like
|
||||
.Xr fold 1 ,
|
||||
except
|
||||
that a hidden newline sequence is used, (which is removed
|
||||
when inverting the file back to its original form with
|
||||
.Xr unvis 1 ) .
|
||||
If the last character in the encoded file does not end in a newline,
|
||||
a hidden newline sequence is appended to the output.
|
||||
This makes
|
||||
the output usable with various editors and other utilities which
|
||||
typically don't work with partial lines.
|
||||
.It Fl f
|
||||
Same as
|
||||
.Fl F .
|
||||
.It Fl h
|
||||
Encode using the URI encoding from RFC 1808.
|
||||
.Pq Dv VIS_HTTPSTYLE
|
||||
.It Fl l
|
||||
Mark newlines with the visible sequence
|
||||
.Ql \e$ ,
|
||||
followed by the newline.
|
||||
.It Fl m
|
||||
Encode using the MIME Quoted-Printable encoding from RFC 2045.
|
||||
.Pq Dv VIS_MIMESTYLE
|
||||
.It Fl n
|
||||
Turns off any encoding, except for the fact that backslashes are
|
||||
still doubled and hidden newline sequences inserted if
|
||||
.Fl f
|
||||
or
|
||||
.Fl F
|
||||
is selected.
|
||||
When combined with the
|
||||
.Fl f
|
||||
flag,
|
||||
.Nm
|
||||
becomes like
|
||||
an invertible version of the
|
||||
.Xr fold 1
|
||||
utility.
|
||||
That is, the output can be unfolded by running the output through
|
||||
.Xr unvis 1 .
|
||||
.It Fl o
|
||||
Request a format which displays non-printable characters as
|
||||
an octal number, \eddd.
|
||||
.Pq Dv VIS_OCTAL
|
||||
.It Fl s
|
||||
Only characters considered unsafe to send to a terminal are encoded.
|
||||
This flag allows backspace, bell, and carriage return in addition
|
||||
to the default space, tab and newline.
|
||||
.Pq Dv VIS_SAFE
|
||||
.It Fl t
|
||||
Tabs are also encoded.
|
||||
.Pq Dv VIS_TAB
|
||||
.It Fl w
|
||||
White space (space-tab-newline) is also encoded.
|
||||
.Pq Dv VIS_WHITE
|
||||
.El
|
||||
.Sh MULTIBYTE CHARACTER SUPPORT
|
||||
.Nm
|
||||
supports multibyte character input.
|
||||
The encoding conversion is influenced by the setting of the
|
||||
.Ev LC_CTYPE
|
||||
environment variable which defines the set of characters that can be
|
||||
copied without encoding.
|
||||
.Pp
|
||||
When 8-bit data is present in the input,
|
||||
.Ev LC_CTYPE
|
||||
must be set to the correct locale or to the C locale.
|
||||
If the locales of the data and the conversion are mismatched, multibyte
|
||||
character recognition may fail and encoding will be performed byte-by-byte
|
||||
instead.
|
||||
.Sh ENVIRONMENT
|
||||
.Bl -tag -width ".Ev LC_CTYPE"
|
||||
.It Ev LC_CTYPE
|
||||
Specify the locale of the input data.
|
||||
Set to C if the input data locale is unknown.
|
||||
.Sh SEE ALSO
|
||||
.Xr unvis 1 ,
|
||||
.Xr svis 3 ,
|
||||
.Xr vis 3
|
||||
.Sh HISTORY
|
||||
The
|
||||
.Nm
|
||||
command appears in
|
||||
.Bx 4.4 .
|
||||
Myltibyte character support was added in
|
||||
.Nx 6.1
|
||||
and
|
||||
.Fx 9.2 .
|
||||
276
vis.c
Normal file
276
vis.c
Normal file
@ -0,0 +1,276 @@
|
||||
/* $NetBSD: vis.c,v 1.22 2013/02/20 17:04:45 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.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
#ifndef lint
|
||||
__COPYRIGHT("@(#) Copyright (c) 1989, 1993\
|
||||
The Regents of the University of California. All rights reserved.");
|
||||
#endif /* not lint */
|
||||
|
||||
#ifndef lint
|
||||
#if 0
|
||||
static char sccsid[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93";
|
||||
#endif
|
||||
__RCSID("$NetBSD: vis.c,v 1.22 2013/02/20 17:04:45 christos Exp $");
|
||||
#endif /* not lint */
|
||||
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
#include <wchar.h>
|
||||
#include <limits.h>
|
||||
#include <unistd.h>
|
||||
#include <err.h>
|
||||
#include <vis.h>
|
||||
|
||||
#include "extern.h"
|
||||
|
||||
static int eflags, fold, foldwidth = 80, none, markeol;
|
||||
#ifdef DEBUG
|
||||
int debug;
|
||||
#endif
|
||||
static const char *extra = "";
|
||||
|
||||
static void process(FILE *);
|
||||
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
FILE *fp;
|
||||
int ch;
|
||||
int rval;
|
||||
|
||||
while ((ch = getopt(argc, argv, "bcde:F:fhlmnostw")) != -1)
|
||||
switch((char)ch) {
|
||||
case 'b':
|
||||
eflags |= VIS_NOSLASH;
|
||||
break;
|
||||
case 'c':
|
||||
eflags |= VIS_CSTYLE;
|
||||
break;
|
||||
#ifdef DEBUG
|
||||
case 'd':
|
||||
debug++;
|
||||
break;
|
||||
#endif
|
||||
case 'e':
|
||||
extra = optarg;
|
||||
break;
|
||||
case 'F':
|
||||
if ((foldwidth = atoi(optarg)) < 5) {
|
||||
errx(1, "can't fold lines to less than 5 cols");
|
||||
/* NOTREACHED */
|
||||
}
|
||||
markeol++;
|
||||
break;
|
||||
case 'f':
|
||||
fold++; /* fold output lines to 80 cols */
|
||||
break; /* using hidden newline */
|
||||
case 'h':
|
||||
eflags |= VIS_HTTPSTYLE;
|
||||
break;
|
||||
case 'l':
|
||||
markeol++; /* mark end of line with \$ */
|
||||
break;
|
||||
case 'm':
|
||||
eflags |= VIS_MIMESTYLE;
|
||||
if (foldwidth == 80)
|
||||
foldwidth = 76;
|
||||
break;
|
||||
case 'n':
|
||||
none++;
|
||||
break;
|
||||
case 'o':
|
||||
eflags |= VIS_OCTAL;
|
||||
break;
|
||||
case 's':
|
||||
eflags |= VIS_SAFE;
|
||||
break;
|
||||
case 't':
|
||||
eflags |= VIS_TAB;
|
||||
break;
|
||||
case 'w':
|
||||
eflags |= VIS_WHITE;
|
||||
break;
|
||||
case '?':
|
||||
default:
|
||||
(void)fprintf(stderr,
|
||||
"Usage: %s [-bcfhlmnostw] [-e extra]"
|
||||
" [-F foldwidth] [file ...]\n", getprogname());
|
||||
return 1;
|
||||
}
|
||||
|
||||
if ((eflags & (VIS_HTTPSTYLE|VIS_MIMESTYLE)) ==
|
||||
(VIS_HTTPSTYLE|VIS_MIMESTYLE))
|
||||
errx(1, "Can't specify -m and -h at the same time");
|
||||
|
||||
argc -= optind;
|
||||
argv += optind;
|
||||
|
||||
rval = 0;
|
||||
|
||||
if (*argv)
|
||||
while (*argv) {
|
||||
if ((fp = fopen(*argv, "r")) != NULL) {
|
||||
process(fp);
|
||||
(void)fclose(fp);
|
||||
} else {
|
||||
warn("%s", *argv);
|
||||
rval = 1;
|
||||
}
|
||||
argv++;
|
||||
}
|
||||
else
|
||||
process(stdin);
|
||||
return rval;
|
||||
}
|
||||
|
||||
static void
|
||||
process(FILE *fp)
|
||||
{
|
||||
static int col = 0;
|
||||
static char nul[] = "\0";
|
||||
char *cp = nul + 1; /* so *(cp-1) starts out != '\n' */
|
||||
wint_t c, c1, rachar;
|
||||
char mbibuff[2 * MB_LEN_MAX + 1]; /* max space for 2 wchars */
|
||||
char buff[4 * MB_LEN_MAX + 1]; /* max encoding length for one char */
|
||||
int mbilen, cerr = 0, raerr = 0;
|
||||
|
||||
/*
|
||||
* The input stream is considered to be multibyte characters.
|
||||
* The input loop will read this data inputing one character,
|
||||
* possibly multiple bytes, at a time and converting each to
|
||||
* a wide character wchar_t.
|
||||
*
|
||||
* The vis(3) functions, however, require single either bytes
|
||||
* or a multibyte string as their arguments. So we convert
|
||||
* our input wchar_t and the following look-ahead wchar_t to
|
||||
* a multibyte string for processing by vis(3).
|
||||
*/
|
||||
|
||||
/* Read one multibyte character, store as wchar_t */
|
||||
c = getwc(fp);
|
||||
if (c == WEOF && errno == EILSEQ) {
|
||||
/* Error in multibyte data. Read one byte. */
|
||||
c = (wint_t)getc(fp);
|
||||
cerr = 1;
|
||||
}
|
||||
while (c != WEOF) {
|
||||
/* Clear multibyte input buffer. */
|
||||
memset(mbibuff, 0, sizeof(mbibuff));
|
||||
/* Read-ahead next multibyte character. */
|
||||
if (!cerr)
|
||||
rachar = getwc(fp);
|
||||
if (cerr || (rachar == WEOF && errno == EILSEQ)) {
|
||||
/* Error in multibyte data. Read one byte. */
|
||||
rachar = (wint_t)getc(fp);
|
||||
raerr = 1;
|
||||
}
|
||||
if (none) {
|
||||
/* Handle -n flag. */
|
||||
cp = buff;
|
||||
*cp++ = c;
|
||||
if (c == '\\')
|
||||
*cp++ = '\\';
|
||||
*cp = '\0';
|
||||
} else if (markeol && c == '\n') {
|
||||
/* Handle -l flag. */
|
||||
cp = buff;
|
||||
if ((eflags & VIS_NOSLASH) == 0)
|
||||
*cp++ = '\\';
|
||||
*cp++ = '$';
|
||||
*cp++ = '\n';
|
||||
*cp = '\0';
|
||||
} else {
|
||||
/*
|
||||
* Convert character using vis(3) library.
|
||||
* At this point we will process one character.
|
||||
* But we must pass the vis(3) library this
|
||||
* character plus the next one because the next
|
||||
* one is used as a look-ahead to decide how to
|
||||
* encode this one under certain circumstances.
|
||||
*
|
||||
* Since our characters may be multibyte, e.g.,
|
||||
* in the UTF-8 locale, we cannot use vis() and
|
||||
* svis() which require byte input, so we must
|
||||
* create a multibyte string and use strvisx().
|
||||
*/
|
||||
/* Treat EOF as a NUL char. */
|
||||
c1 = rachar;
|
||||
if (c1 == WEOF)
|
||||
c1 = L'\0';
|
||||
/*
|
||||
* If we hit a multibyte conversion error above,
|
||||
* insert byte directly into string buff because
|
||||
* wctomb() will fail. Else convert wchar_t to
|
||||
* multibyte using wctomb().
|
||||
*/
|
||||
if (cerr) {
|
||||
*mbibuff = (char)c;
|
||||
mbilen = 1;
|
||||
} else
|
||||
mbilen = wctomb(mbibuff, c);
|
||||
/* Same for look-ahead character. */
|
||||
if (raerr)
|
||||
mbibuff[mbilen] = (char)c1;
|
||||
else
|
||||
wctomb(mbibuff + mbilen, c1);
|
||||
/* Perform encoding on just first character. */
|
||||
(void) strsenvisx(buff, 4 * MB_LEN_MAX, mbibuff,
|
||||
1, eflags, extra, &cerr);
|
||||
}
|
||||
|
||||
cp = buff;
|
||||
if (fold) {
|
||||
#ifdef DEBUG
|
||||
if (debug)
|
||||
(void)printf("<%02d,", col);
|
||||
#endif
|
||||
col = foldit(cp, col, foldwidth, eflags);
|
||||
#ifdef DEBUG
|
||||
if (debug)
|
||||
(void)printf("%02d>", col);
|
||||
#endif
|
||||
}
|
||||
do {
|
||||
(void)putchar(*cp);
|
||||
} while (*++cp);
|
||||
c = rachar;
|
||||
cerr = raerr;
|
||||
}
|
||||
/*
|
||||
* terminate partial line with a hidden newline
|
||||
*/
|
||||
if (fold && *(cp - 1) != '\n')
|
||||
(void)printf(eflags & VIS_MIMESTYLE ? "=\n" : "\\\n");
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user