f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
574 lines
14 KiB
C
574 lines
14 KiB
C
/* $NetBSD: vis.c,v 1.44 2011/03/12 19:52:48 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 1.44 2011/03/12 19:52:48 christos Exp $");
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include "namespace.h"
|
|
#include <sys/types.h>
|
|
|
|
#include <assert.h>
|
|
#include <vis.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
|
|
#ifdef __weak_alias
|
|
__weak_alias(strvisx,_strvisx)
|
|
#endif
|
|
|
|
#if !HAVE_VIS || !HAVE_SVIS
|
|
#include <ctype.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
static char *do_svis(char *, size_t *, int, int, int, const char *);
|
|
|
|
#undef BELL
|
|
#define BELL '\a'
|
|
|
|
#define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
|
|
#define iswhite(c) (c == ' ' || c == '\t' || c == '\n')
|
|
#define issafe(c) (c == '\b' || c == BELL || c == '\r')
|
|
#define xtoa(c) "0123456789abcdef"[c]
|
|
#define XTOA(c) "0123456789ABCDEF"[c]
|
|
|
|
#define MAXEXTRAS 5
|
|
|
|
#define MAKEEXTRALIST(flag, extra, orig_str) \
|
|
do { \
|
|
const char *orig = orig_str; \
|
|
const char *o = orig; \
|
|
char *e; \
|
|
while (*o++) \
|
|
continue; \
|
|
extra = malloc((size_t)((o - orig) + MAXEXTRAS)); \
|
|
if (!extra) break; \
|
|
for (o = orig, e = extra; (*e++ = *o++) != '\0';) \
|
|
continue; \
|
|
e--; \
|
|
if (flag & VIS_SP) *e++ = ' '; \
|
|
if (flag & VIS_TAB) *e++ = '\t'; \
|
|
if (flag & VIS_NL) *e++ = '\n'; \
|
|
if ((flag & VIS_NOSLASH) == 0) *e++ = '\\'; \
|
|
*e = '\0'; \
|
|
} while (/*CONSTCOND*/0)
|
|
|
|
/*
|
|
* This is do_hvis, for HTTP style (RFC 1808)
|
|
*/
|
|
static char *
|
|
do_hvis(char *dst, size_t *dlen, int c, int flag, int nextc, const char *extra)
|
|
{
|
|
|
|
if ((isascii(c) && isalnum(c))
|
|
/* safe */
|
|
|| c == '$' || c == '-' || c == '_' || c == '.' || c == '+'
|
|
/* extra */
|
|
|| c == '!' || c == '*' || c == '\'' || c == '(' || c == ')'
|
|
|| c == ',') {
|
|
dst = do_svis(dst, dlen, c, flag, nextc, extra);
|
|
} else {
|
|
if (dlen) {
|
|
if (*dlen < 3)
|
|
return NULL;
|
|
*dlen -= 3;
|
|
}
|
|
*dst++ = '%';
|
|
*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 char *
|
|
do_mvis(char *dst, size_t *dlen, int c, int flag, int nextc, const char *extra)
|
|
{
|
|
if ((c != '\n') &&
|
|
/* Space at the end of the line */
|
|
((isspace(c) && (nextc == '\r' || nextc == '\n')) ||
|
|
/* Out of range */
|
|
(!isspace(c) && (c < 33 || (c > 60 && c < 62) || c > 126)) ||
|
|
/* Specific char to be escaped */
|
|
strchr("#$@[\\]^`{|}~", c) != NULL)) {
|
|
if (dlen) {
|
|
if (*dlen < 3)
|
|
return NULL;
|
|
*dlen -= 3;
|
|
}
|
|
*dst++ = '=';
|
|
*dst++ = XTOA(((unsigned int)c >> 4) & 0xf);
|
|
*dst++ = XTOA((unsigned int)c & 0xf);
|
|
} else {
|
|
dst = do_svis(dst, dlen, c, flag, nextc, extra);
|
|
}
|
|
return dst;
|
|
}
|
|
|
|
/*
|
|
* This is do_vis, the central code of vis.
|
|
* dst: Pointer to the destination buffer
|
|
* c: Character to encode
|
|
* flag: Flag word
|
|
* nextc: The character following 'c'
|
|
* extra: Pointer to the list of extra characters to be
|
|
* backslash-protected.
|
|
*/
|
|
static char *
|
|
do_svis(char *dst, size_t *dlen, int c, int flag, int nextc, const char *extra)
|
|
{
|
|
int isextra;
|
|
size_t odlen = dlen ? *dlen : 0;
|
|
|
|
isextra = strchr(extra, c) != NULL;
|
|
#define HAVE(x) \
|
|
do { \
|
|
if (dlen) { \
|
|
if (*dlen < (x)) \
|
|
goto out; \
|
|
*dlen -= (x); \
|
|
} \
|
|
} while (/*CONSTCOND*/0)
|
|
if (!isextra && isascii(c) && (isgraph(c) || iswhite(c) ||
|
|
((flag & VIS_SAFE) && issafe(c)))) {
|
|
HAVE(1);
|
|
*dst++ = c;
|
|
return dst;
|
|
}
|
|
if (flag & VIS_CSTYLE) {
|
|
HAVE(2);
|
|
switch (c) {
|
|
case '\n':
|
|
*dst++ = '\\'; *dst++ = 'n';
|
|
return dst;
|
|
case '\r':
|
|
*dst++ = '\\'; *dst++ = 'r';
|
|
return dst;
|
|
case '\b':
|
|
*dst++ = '\\'; *dst++ = 'b';
|
|
return dst;
|
|
case BELL:
|
|
*dst++ = '\\'; *dst++ = 'a';
|
|
return dst;
|
|
case '\v':
|
|
*dst++ = '\\'; *dst++ = 'v';
|
|
return dst;
|
|
case '\t':
|
|
*dst++ = '\\'; *dst++ = 't';
|
|
return dst;
|
|
case '\f':
|
|
*dst++ = '\\'; *dst++ = 'f';
|
|
return dst;
|
|
case ' ':
|
|
*dst++ = '\\'; *dst++ = 's';
|
|
return dst;
|
|
case '\0':
|
|
*dst++ = '\\'; *dst++ = '0';
|
|
if (isoctal(nextc)) {
|
|
HAVE(2);
|
|
*dst++ = '0';
|
|
*dst++ = '0';
|
|
}
|
|
return dst;
|
|
default:
|
|
if (isgraph(c)) {
|
|
*dst++ = '\\'; *dst++ = c;
|
|
return dst;
|
|
}
|
|
if (dlen)
|
|
*dlen = odlen;
|
|
}
|
|
}
|
|
if (isextra || ((c & 0177) == ' ') || (flag & VIS_OCTAL)) {
|
|
HAVE(4);
|
|
*dst++ = '\\';
|
|
*dst++ = (u_char)(((u_int32_t)(u_char)c >> 6) & 03) + '0';
|
|
*dst++ = (u_char)(((u_int32_t)(u_char)c >> 3) & 07) + '0';
|
|
*dst++ = (c & 07) + '0';
|
|
} else {
|
|
if ((flag & VIS_NOSLASH) == 0) {
|
|
HAVE(1);
|
|
*dst++ = '\\';
|
|
}
|
|
|
|
if (c & 0200) {
|
|
HAVE(1);
|
|
c &= 0177; *dst++ = 'M';
|
|
}
|
|
|
|
if (iscntrl(c)) {
|
|
HAVE(2);
|
|
*dst++ = '^';
|
|
if (c == 0177)
|
|
*dst++ = '?';
|
|
else
|
|
*dst++ = c + '@';
|
|
} else {
|
|
HAVE(2);
|
|
*dst++ = '-'; *dst++ = c;
|
|
}
|
|
}
|
|
return dst;
|
|
out:
|
|
*dlen = odlen;
|
|
return NULL;
|
|
}
|
|
|
|
typedef char *(*visfun_t)(char *, size_t *, int, int, int, const char *);
|
|
|
|
/*
|
|
* Return the appropriate encoding function depending on the flags given.
|
|
*/
|
|
static visfun_t
|
|
getvisfun(int flag)
|
|
{
|
|
if (flag & VIS_HTTPSTYLE)
|
|
return do_hvis;
|
|
if (flag & VIS_MIMESTYLE)
|
|
return do_mvis;
|
|
return do_svis;
|
|
}
|
|
|
|
/*
|
|
* isnvis - visually encode characters, also encoding the characters
|
|
* pointed to by `extra'
|
|
*/
|
|
static char *
|
|
isnvis(char *dst, size_t *dlen, int c, int flag, int nextc, const char *extra)
|
|
{
|
|
char *nextra = NULL;
|
|
visfun_t f;
|
|
|
|
_DIAGASSERT(dst != NULL);
|
|
_DIAGASSERT(extra != NULL);
|
|
MAKEEXTRALIST(flag, nextra, extra);
|
|
if (!nextra) {
|
|
if (dlen && *dlen == 0) {
|
|
errno = ENOSPC;
|
|
return NULL;
|
|
}
|
|
*dst = '\0'; /* can't create nextra, return "" */
|
|
return dst;
|
|
}
|
|
f = getvisfun(flag);
|
|
dst = (*f)(dst, dlen, c, flag, nextc, nextra);
|
|
free(nextra);
|
|
if (dst == NULL || (dlen && *dlen == 0)) {
|
|
errno = ENOSPC;
|
|
return NULL;
|
|
}
|
|
*dst = '\0';
|
|
return dst;
|
|
}
|
|
|
|
char *
|
|
svis(char *dst, int c, int flag, int nextc, const char *extra)
|
|
{
|
|
return isnvis(dst, NULL, c, flag, nextc, extra);
|
|
}
|
|
|
|
char *
|
|
snvis(char *dst, size_t dlen, int c, int flag, int nextc, const char *extra)
|
|
{
|
|
return isnvis(dst, &dlen, c, flag, nextc, extra);
|
|
}
|
|
|
|
|
|
/*
|
|
* strsvis, strsvisx - visually encode characters from src into dst
|
|
*
|
|
* Extra is a pointer to a \0-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.
|
|
*
|
|
* 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.
|
|
*
|
|
* Strsvisx encodes exactly len bytes from src into dst.
|
|
* This is useful for encoding a block of data.
|
|
*/
|
|
static int
|
|
istrsnvis(char *dst, size_t *dlen, const char *csrc, int flag, const char *extra)
|
|
{
|
|
int c;
|
|
char *start;
|
|
char *nextra = NULL;
|
|
const unsigned char *src = (const unsigned char *)csrc;
|
|
visfun_t f;
|
|
|
|
_DIAGASSERT(dst != NULL);
|
|
_DIAGASSERT(src != NULL);
|
|
_DIAGASSERT(extra != NULL);
|
|
MAKEEXTRALIST(flag, nextra, extra);
|
|
if (!nextra) {
|
|
*dst = '\0'; /* can't create nextra, return "" */
|
|
return 0;
|
|
}
|
|
f = getvisfun(flag);
|
|
for (start = dst; (c = *src++) != '\0'; /* empty */) {
|
|
dst = (*f)(dst, dlen, c, flag, *src, nextra);
|
|
if (dst == NULL) {
|
|
errno = ENOSPC;
|
|
return -1;
|
|
}
|
|
}
|
|
free(nextra);
|
|
if (dlen && *dlen == 0) {
|
|
errno = ENOSPC;
|
|
return -1;
|
|
}
|
|
*dst = '\0';
|
|
return (int)(dst - start);
|
|
}
|
|
|
|
int
|
|
strsvis(char *dst, const char *csrc, int flag, const char *extra)
|
|
{
|
|
return istrsnvis(dst, NULL, csrc, flag, extra);
|
|
}
|
|
|
|
int
|
|
strsnvis(char *dst, size_t dlen, const char *csrc, int flag, const char *extra)
|
|
{
|
|
return istrsnvis(dst, &dlen, csrc, flag, extra);
|
|
}
|
|
|
|
static int
|
|
istrsnvisx(char *dst, size_t *dlen, const char *csrc, size_t len, int flag,
|
|
const char *extra)
|
|
{
|
|
unsigned char c;
|
|
char *start;
|
|
char *nextra = NULL;
|
|
const unsigned char *src = (const unsigned char *)csrc;
|
|
visfun_t f;
|
|
|
|
_DIAGASSERT(dst != NULL);
|
|
_DIAGASSERT(src != NULL);
|
|
_DIAGASSERT(extra != NULL);
|
|
MAKEEXTRALIST(flag, nextra, extra);
|
|
if (! nextra) {
|
|
if (dlen && *dlen == 0) {
|
|
errno = ENOSPC;
|
|
return -1;
|
|
}
|
|
*dst = '\0'; /* can't create nextra, return "" */
|
|
return 0;
|
|
}
|
|
|
|
f = getvisfun(flag);
|
|
for (start = dst; len > 0; len--) {
|
|
c = *src++;
|
|
dst = (*f)(dst, dlen, c, flag, len > 1 ? *src : '\0', nextra);
|
|
if (dst == NULL) {
|
|
errno = ENOSPC;
|
|
return -1;
|
|
}
|
|
}
|
|
free(nextra);
|
|
if (dlen && *dlen == 0) {
|
|
errno = ENOSPC;
|
|
return -1;
|
|
}
|
|
*dst = '\0';
|
|
return (int)(dst - start);
|
|
}
|
|
|
|
int
|
|
strsvisx(char *dst, const char *csrc, size_t len, int flag, const char *extra)
|
|
{
|
|
return istrsnvisx(dst, NULL, csrc, len, flag, extra);
|
|
}
|
|
|
|
int
|
|
strsnvisx(char *dst, size_t dlen, const char *csrc, size_t len, int flag,
|
|
const char *extra)
|
|
{
|
|
return istrsnvisx(dst, &dlen, csrc, len, flag, extra);
|
|
}
|
|
#endif
|
|
|
|
#if !HAVE_VIS
|
|
/*
|
|
* vis - visually encode characters
|
|
*/
|
|
static char *
|
|
invis(char *dst, size_t *dlen, int c, int flag, int nextc)
|
|
{
|
|
char *extra = NULL;
|
|
unsigned char uc = (unsigned char)c;
|
|
visfun_t f;
|
|
|
|
_DIAGASSERT(dst != NULL);
|
|
|
|
MAKEEXTRALIST(flag, extra, "");
|
|
if (! extra) {
|
|
if (dlen && *dlen == 0) {
|
|
errno = ENOSPC;
|
|
return NULL;
|
|
}
|
|
*dst = '\0'; /* can't create extra, return "" */
|
|
return dst;
|
|
}
|
|
f = getvisfun(flag);
|
|
dst = (*f)(dst, dlen, uc, flag, nextc, extra);
|
|
free(extra);
|
|
if (dst == NULL || (dlen && *dlen == 0)) {
|
|
errno = ENOSPC;
|
|
return NULL;
|
|
}
|
|
*dst = '\0';
|
|
return dst;
|
|
}
|
|
|
|
char *
|
|
vis(char *dst, int c, int flag, int nextc)
|
|
{
|
|
return invis(dst, NULL, c, flag, nextc);
|
|
}
|
|
|
|
char *
|
|
nvis(char *dst, size_t dlen, int c, int flag, int nextc)
|
|
{
|
|
return invis(dst, &dlen, c, flag, nextc);
|
|
}
|
|
|
|
|
|
/*
|
|
* strvis, 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 bytes from src into dst.
|
|
* This is useful for encoding a block of data.
|
|
*/
|
|
static int
|
|
istrnvis(char *dst, size_t *dlen, const char *src, int flag)
|
|
{
|
|
char *extra = NULL;
|
|
int rv;
|
|
|
|
MAKEEXTRALIST(flag, extra, "");
|
|
if (!extra) {
|
|
if (dlen && *dlen == 0) {
|
|
errno = ENOSPC;
|
|
return -1;
|
|
}
|
|
*dst = '\0'; /* can't create extra, return "" */
|
|
return 0;
|
|
}
|
|
rv = istrsnvis(dst, dlen, src, flag, extra);
|
|
free(extra);
|
|
return rv;
|
|
}
|
|
|
|
int
|
|
strvis(char *dst, const char *src, int flag)
|
|
{
|
|
return istrnvis(dst, NULL, src, flag);
|
|
}
|
|
|
|
int
|
|
strnvis(char *dst, size_t dlen, const char *src, int flag)
|
|
{
|
|
return istrnvis(dst, &dlen, src, flag);
|
|
}
|
|
|
|
static int
|
|
istrnvisx(char *dst, size_t *dlen, const char *src, size_t len, int flag)
|
|
{
|
|
char *extra = NULL;
|
|
int rv;
|
|
|
|
MAKEEXTRALIST(flag, extra, "");
|
|
if (!extra) {
|
|
if (dlen && *dlen == 0) {
|
|
errno = ENOSPC;
|
|
return -1;
|
|
}
|
|
*dst = '\0'; /* can't create extra, return "" */
|
|
return 0;
|
|
}
|
|
rv = istrsnvisx(dst, dlen, src, len, flag, extra);
|
|
free(extra);
|
|
return rv;
|
|
}
|
|
|
|
int
|
|
strvisx(char *dst, const char *src, size_t len, int flag)
|
|
{
|
|
return istrnvisx(dst, NULL, src, len, flag);
|
|
}
|
|
|
|
int
|
|
strnvisx(char *dst, size_t dlen, const char *src, size_t len, int flag)
|
|
{
|
|
return istrnvisx(dst, &dlen, src, len, flag);
|
|
}
|
|
|
|
#endif
|