168 lines
5 KiB
C
168 lines
5 KiB
C
/* $NetBSD: util.c,v 1.34 2011/08/29 14:44:21 joerg Exp $ */
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/*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Michael Fischbein.
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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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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)util.c 8.5 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: util.c,v 1.34 2011/08/29 14:44:21 joerg Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <fts.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <vis.h>
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#include <wchar.h>
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#include <wctype.h>
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#include "ls.h"
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#include "extern.h"
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int
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safe_print(const char *src)
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{
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size_t len;
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char *name;
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int flags;
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flags = VIS_NL | VIS_OCTAL | VIS_WHITE;
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if (f_octal_escape)
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flags |= VIS_CSTYLE;
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len = strlen(src);
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if (len != 0 && SIZE_T_MAX/len <= 4) {
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errx(EXIT_FAILURE, "%s: name too long", src);
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/* NOTREACHED */
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}
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name = (char *)malloc(4*len+1);
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if (name != NULL) {
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len = strvis(name, src, flags);
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(void)printf("%s", name);
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free(name);
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return len;
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} else
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errx(EXIT_FAILURE, "out of memory!");
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/* NOTREACHED */
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}
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/*
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* The reasons why we don't use putwchar(wc) here are:
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* - If wc == L'\0', we need to restore the initial shift state, but
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* the C language standard doesn't say that putwchar(L'\0') does.
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* - It isn't portable to mix a wide-oriented function (i.e. getwchar)
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* with byte-oriented functions (printf et al.) in same FILE.
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*/
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static int
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printwc(wchar_t wc, mbstate_t *pst)
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{
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size_t size;
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char buf[MB_LEN_MAX];
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size = wcrtomb(buf, wc, pst);
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if (size == (size_t)-1) /* This shouldn't happen, but for sure */
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return 0;
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if (wc == L'\0') {
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/* The following condition must be always true, but for sure */
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if (size > 0 && buf[size - 1] == '\0')
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--size;
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}
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if (size > 0)
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fwrite(buf, 1, size, stdout);
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return wc == L'\0' ? 0 : wcwidth(wc);
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}
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int
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printescaped(const char *src)
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{
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int n = 0;
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mbstate_t src_state, stdout_state;
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/* The following +1 is to pass '\0' at the end of src to mbrtowc(). */
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const char *endptr = src + strlen(src) + 1;
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/*
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* We have to reset src_state each time in this function, because
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* the codeset of src pathname may not match with current locale.
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* Note that if we pass NULL instead of src_state to mbrtowc(),
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* there is no way to reset the state.
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*/
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memset(&src_state, 0, sizeof(src_state));
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memset(&stdout_state, 0, sizeof(stdout_state));
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while (src < endptr) {
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wchar_t wc;
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size_t rv, span = endptr - src;
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#if 0
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/*
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* XXX - we should fix libc instead.
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* Theoretically this should work, but our current
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* implementation of iso2022 module doesn't actually work
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* as expected, if there are redundant escape sequences
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* which exceed 32 bytes.
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*/
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if (span > MB_CUR_MAX)
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span = MB_CUR_MAX;
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#endif
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rv = mbrtowc(&wc, src, span, &src_state);
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if (rv == 0) { /* assert(wc == L'\0'); */
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/* The following may output a shift sequence. */
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n += printwc(wc, &stdout_state);
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break;
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}
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if (rv == (size_t)-1) { /* probably errno == EILSEQ */
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n += printwc(L'?', &stdout_state);
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/* try to skip 1byte, because there is no better way */
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src++;
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memset(&src_state, 0, sizeof(src_state));
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} else if (rv == (size_t)-2) {
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if (span < MB_CUR_MAX) { /* incomplete char */
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n += printwc(L'?', &stdout_state);
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break;
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}
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src += span; /* a redundant shift sequence? */
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} else {
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n += printwc(iswprint(wc) ? wc : L'?', &stdout_state);
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src += rv;
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}
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}
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return n;
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}
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