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