eff99d7356
match our import of the (un)vis(3) APIs. This adds support for multibyte encoding and the -h and -m flags which support HTTP and MIME encoding respectively. PR: bin/175418 Obtained from: NetBSD
277 lines
7.1 KiB
C
277 lines
7.1 KiB
C
/* $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");
|
|
}
|