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https://github.com/samba-team/samba.git
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014a72c7da
Signed-off-by: Andreas Schneider <asn@samba.org> Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
981 lines
21 KiB
C
981 lines
21 KiB
C
/*
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Unix SMB/CIFS implementation.
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minimal iconv implementation
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Copyright (C) Andrew Tridgell 2001
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Copyright (C) Jelmer Vernooij 2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include "system/iconv.h"
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#include "system/filesys.h"
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#include "lib/util/byteorder.h"
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#include "lib/util/dlinklist.h"
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#include "lib/util/charset/charset.h"
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#include "lib/util/charset/charset_proto.h"
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#include "libcli/util/ntstatus.h"
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#include "lib/util/util_str_hex.h"
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#ifdef strcasecmp
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#undef strcasecmp
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#endif
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/**
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* @file
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*
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* @brief Samba wrapper/stub for iconv character set conversion.
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*
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* iconv is the XPG2 interface for converting between character
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* encodings. This file provides a Samba wrapper around it, and also
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* a simple reimplementation that is used if the system does not
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* implement iconv.
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*
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* Samba only works with encodings that are supersets of ASCII: ascii
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* characters like whitespace can be tested for directly, multibyte
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* sequences start with a byte with the high bit set, and strings are
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* terminated by a nul byte.
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*
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* Note that the only function provided by iconv is conversion between
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* characters. It doesn't directly support operations like
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* uppercasing or comparison. We have to convert to UTF-16LE and
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* compare there.
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*
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* @sa Samba Developers Guide
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**/
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static size_t ascii_pull (void *,const char **, size_t *, char **, size_t *);
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static size_t ascii_push (void *,const char **, size_t *, char **, size_t *);
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static size_t latin1_pull(void *,const char **, size_t *, char **, size_t *);
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static size_t latin1_push(void *,const char **, size_t *, char **, size_t *);
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static size_t utf8_pull (void *,const char **, size_t *, char **, size_t *);
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static size_t utf8_push (void *,const char **, size_t *, char **, size_t *);
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static size_t utf16_munged_pull(void *,const char **, size_t *, char **, size_t *);
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static size_t ucs2hex_pull(void *,const char **, size_t *, char **, size_t *);
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static size_t ucs2hex_push(void *,const char **, size_t *, char **, size_t *);
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static size_t iconv_copy (void *,const char **, size_t *, char **, size_t *);
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static size_t iconv_swab (void *,const char **, size_t *, char **, size_t *);
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static const struct charset_functions builtin_functions[] = {
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/* windows is closest to UTF-16 */
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{
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.name = "UCS-2LE",
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.pull = iconv_copy,
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.push = iconv_copy
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},
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{
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.name = "UTF-16LE",
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.pull = iconv_copy,
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.push = iconv_copy
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},
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{
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.name = "UCS-2BE",
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.pull = iconv_swab,
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.push = iconv_swab
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},
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{
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.name = "UTF-16BE",
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.pull = iconv_swab,
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.push = iconv_swab
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},
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/* we include the UTF-8 alias to cope with differing locale settings */
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{
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.name = "UTF8",
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.pull = utf8_pull,
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.push = utf8_push
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},
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{
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.name = "UTF-8",
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.pull = utf8_pull,
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.push = utf8_push
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},
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/* this handles the munging needed for String2Key */
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{
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.name = "UTF16_MUNGED",
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.pull = utf16_munged_pull,
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.push = iconv_copy,
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.samba_internal_charset = true
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},
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{
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.name = "ASCII",
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.pull = ascii_pull,
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.push = ascii_push
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},
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{
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.name = "646",
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.pull = ascii_pull,
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.push = ascii_push
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},
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{
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.name = "ISO-8859-1",
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.pull = latin1_pull,
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.push = latin1_push
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},
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#ifdef DEVELOPER
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{
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.name = "WEIRD",
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.pull = weird_pull,
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.push = weird_push,
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.samba_internal_charset = true
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},
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#endif
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#ifdef DARWINOS
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{
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.name = "MACOSXFS",
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.pull = macosxfs_encoding_pull,
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.push = macosxfs_encoding_push,
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.samba_internal_charset = true
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},
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#endif
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{
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.name = "UCS2-HEX",
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.pull = ucs2hex_pull,
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.push = ucs2hex_push,
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.samba_internal_charset = true
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}
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};
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#ifdef HAVE_NATIVE_ICONV
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/* if there was an error then reset the internal state,
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this ensures that we don't have a shift state remaining for
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character sets like SJIS */
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static size_t sys_iconv(void *cd,
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const char **inbuf, size_t *inbytesleft,
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char **outbuf, size_t *outbytesleft)
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{
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size_t ret = iconv((iconv_t)cd,
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discard_const_p(char *, inbuf), inbytesleft,
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outbuf, outbytesleft);
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if (ret == (size_t)-1) iconv(cd, NULL, NULL, NULL, NULL);
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return ret;
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}
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#endif
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/**
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* This is a simple portable iconv() implementaion.
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*
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* It only knows about a very small number of character sets - just
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* enough that Samba works on systems that don't have iconv.
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**/
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_PUBLIC_ size_t smb_iconv(smb_iconv_t cd,
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const char **inbuf, size_t *inbytesleft,
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char **outbuf, size_t *outbytesleft)
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{
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/* in many cases we can go direct */
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if (cd->direct) {
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return cd->direct(cd->cd_direct,
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inbuf, inbytesleft, outbuf, outbytesleft);
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}
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/* otherwise we have to do it chunks at a time */
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{
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#ifndef SMB_ICONV_BUFSIZE
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#define SMB_ICONV_BUFSIZE 2048
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#endif
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size_t bufsize;
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char cvtbuf[SMB_ICONV_BUFSIZE];
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while (*inbytesleft > 0) {
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char *bufp1 = cvtbuf;
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const char *bufp2 = cvtbuf;
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int saved_errno = errno;
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bool pull_failed = false;
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bufsize = SMB_ICONV_BUFSIZE;
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if (cd->pull(cd->cd_pull,
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inbuf, inbytesleft, &bufp1, &bufsize) == -1
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&& errno != E2BIG) {
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saved_errno = errno;
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pull_failed = true;
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}
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bufsize = SMB_ICONV_BUFSIZE - bufsize;
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if (cd->push(cd->cd_push,
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&bufp2, &bufsize,
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outbuf, outbytesleft) == -1) {
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return -1;
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} else if (pull_failed) {
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/* We want the pull errno if possible */
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errno = saved_errno;
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return -1;
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}
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}
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}
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return 0;
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}
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static bool is_utf16(const char *name)
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{
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return strcasecmp(name, "UCS-2LE") == 0 ||
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strcasecmp(name, "UTF-16LE") == 0;
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}
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static int smb_iconv_t_destructor(smb_iconv_t hwd)
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{
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#ifdef HAVE_NATIVE_ICONV
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if (hwd->cd_pull != NULL && hwd->cd_pull != (iconv_t)-1)
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iconv_close(hwd->cd_pull);
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if (hwd->cd_push != NULL && hwd->cd_push != (iconv_t)-1)
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iconv_close(hwd->cd_push);
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if (hwd->cd_direct != NULL && hwd->cd_direct != (iconv_t)-1)
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iconv_close(hwd->cd_direct);
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#endif
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return 0;
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}
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_PUBLIC_ smb_iconv_t smb_iconv_open_ex(TALLOC_CTX *mem_ctx, const char *tocode,
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const char *fromcode, bool use_builtin_handlers)
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{
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smb_iconv_t ret;
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const struct charset_functions *from=NULL, *to=NULL;
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int i;
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ret = (smb_iconv_t)talloc_named(mem_ctx,
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sizeof(*ret),
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"iconv(%s,%s)", tocode, fromcode);
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if (!ret) {
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errno = ENOMEM;
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return (smb_iconv_t)-1;
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}
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memset(ret, 0, sizeof(*ret));
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talloc_set_destructor(ret, smb_iconv_t_destructor);
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/* check for the simplest null conversion */
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if (strcmp(fromcode, tocode) == 0) {
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ret->direct = iconv_copy;
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return ret;
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}
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/* check if we have a builtin function for this conversion */
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for (i=0;i<ARRAY_SIZE(builtin_functions);i++) {
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if (strcasecmp(fromcode, builtin_functions[i].name) == 0) {
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if (use_builtin_handlers || builtin_functions[i].samba_internal_charset) {
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from = &builtin_functions[i];
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}
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}
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if (strcasecmp(tocode, builtin_functions[i].name) == 0) {
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if (use_builtin_handlers || builtin_functions[i].samba_internal_charset) {
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to = &builtin_functions[i];
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}
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}
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}
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#ifdef HAVE_NATIVE_ICONV
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/* the from and to variables indicate a samba module or
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* internal conversion, ret->pull and ret->push are
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* initialised only in this block for iconv based
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* conversions */
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if (from == NULL) {
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ret->cd_pull = iconv_open("UTF-16LE", fromcode);
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if (ret->cd_pull == (iconv_t)-1)
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ret->cd_pull = iconv_open("UCS-2LE", fromcode);
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if (ret->cd_pull != (iconv_t)-1) {
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ret->pull = sys_iconv;
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}
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}
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if (to == NULL) {
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ret->cd_push = iconv_open(tocode, "UTF-16LE");
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if (ret->cd_push == (iconv_t)-1)
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ret->cd_push = iconv_open(tocode, "UCS-2LE");
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if (ret->cd_push != (iconv_t)-1) {
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ret->push = sys_iconv;
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}
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}
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#endif
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if (ret->pull == NULL && from == NULL) {
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goto failed;
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}
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if (ret->push == NULL && to == NULL) {
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goto failed;
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}
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/* check for conversion to/from ucs2 */
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if (is_utf16(fromcode) && to) {
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ret->direct = to->push;
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return ret;
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}
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if (is_utf16(tocode) && from) {
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ret->direct = from->pull;
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return ret;
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}
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#ifdef HAVE_NATIVE_ICONV
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if (is_utf16(fromcode)) {
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ret->direct = sys_iconv;
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ret->cd_direct = ret->cd_push;
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ret->cd_push = NULL;
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return ret;
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}
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if (is_utf16(tocode)) {
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ret->direct = sys_iconv;
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ret->cd_direct = ret->cd_pull;
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ret->cd_pull = NULL;
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return ret;
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}
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#endif
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/* the general case has to go via a buffer */
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if (!ret->pull) ret->pull = from->pull;
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if (!ret->push) ret->push = to->push;
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return ret;
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failed:
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talloc_free(ret);
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errno = EINVAL;
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return (smb_iconv_t)-1;
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}
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/*
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simple iconv_open() wrapper
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*/
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_PUBLIC_ smb_iconv_t smb_iconv_open(const char *tocode, const char *fromcode)
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{
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return smb_iconv_open_ex(NULL, tocode, fromcode, true);
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}
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/*
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simple iconv_close() wrapper
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*/
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_PUBLIC_ int smb_iconv_close(smb_iconv_t cd)
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{
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talloc_free(cd);
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return 0;
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}
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/**********************************************************************
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the following functions implement the builtin character sets in Samba
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and also the "test" character sets that are designed to test
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multi-byte character set support for english users
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***********************************************************************/
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/*
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this takes an ASCII sequence and produces a UTF16 sequence
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The first 127 codepoints of latin1 matches the first 127 codepoints
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of unicode, and so can be put into the first byte of UTF16LE
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*/
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static size_t ascii_pull(void *cd, const char **inbuf, size_t *inbytesleft,
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char **outbuf, size_t *outbytesleft)
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{
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while (*inbytesleft >= 1 && *outbytesleft >= 2) {
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if (((*inbuf)[0] & 0x7F) != (*inbuf)[0]) {
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/* If this is multi-byte, then it isn't legal ASCII */
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errno = EILSEQ;
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return -1;
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}
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(*outbuf)[0] = (*inbuf)[0];
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(*outbuf)[1] = 0;
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(*inbytesleft) -= 1;
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(*outbytesleft) -= 2;
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(*inbuf) += 1;
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(*outbuf) += 2;
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}
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if (*inbytesleft > 0) {
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errno = E2BIG;
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return -1;
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}
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return 0;
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}
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/*
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this takes a UTF16 sequence and produces an ASCII sequence
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The first 127 codepoints of ASCII matches the first 127 codepoints
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of unicode, and so can be read directly from the first byte of UTF16LE
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*/
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static size_t ascii_push(void *cd, const char **inbuf, size_t *inbytesleft,
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char **outbuf, size_t *outbytesleft)
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{
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int ir_count=0;
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while (*inbytesleft >= 2 && *outbytesleft >= 1) {
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if (((*inbuf)[0] & 0x7F) != (*inbuf)[0] ||
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(*inbuf)[1] != 0) {
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/* If this is multi-byte, then it isn't legal ASCII */
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errno = EILSEQ;
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return -1;
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}
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(*outbuf)[0] = (*inbuf)[0];
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(*inbytesleft) -= 2;
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(*outbytesleft) -= 1;
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(*inbuf) += 2;
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(*outbuf) += 1;
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}
|
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if (*inbytesleft == 1) {
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errno = EINVAL;
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return -1;
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}
|
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if (*inbytesleft > 1) {
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errno = E2BIG;
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return -1;
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}
|
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return ir_count;
|
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}
|
|
|
|
/*
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this takes a latin1/ISO-8859-1 sequence and produces a UTF16 sequence
|
|
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The first 256 codepoints of latin1 matches the first 256 codepoints
|
|
of unicode, and so can be put into the first byte of UTF16LE
|
|
|
|
*/
|
|
static size_t latin1_pull(void *cd, const char **inbuf, size_t *inbytesleft,
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char **outbuf, size_t *outbytesleft)
|
|
{
|
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while (*inbytesleft >= 1 && *outbytesleft >= 2) {
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(*outbuf)[0] = (*inbuf)[0];
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(*outbuf)[1] = 0;
|
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(*inbytesleft) -= 1;
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(*outbytesleft) -= 2;
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(*inbuf) += 1;
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(*outbuf) += 2;
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}
|
|
|
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if (*inbytesleft > 0) {
|
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errno = E2BIG;
|
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return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
this takes a UTF16 sequence and produces a latin1/ISO-8859-1 sequence
|
|
|
|
The first 256 codepoints of latin1 matches the first 256 codepoints
|
|
of unicode, and so can be read directly from the first byte of UTF16LE
|
|
|
|
*/
|
|
static size_t latin1_push(void *cd, const char **inbuf, size_t *inbytesleft,
|
|
char **outbuf, size_t *outbytesleft)
|
|
{
|
|
int ir_count=0;
|
|
|
|
while (*inbytesleft >= 2 && *outbytesleft >= 1) {
|
|
(*outbuf)[0] = (*inbuf)[0];
|
|
if ((*inbuf)[1] != 0) {
|
|
/* If this is multi-byte, then it isn't legal latin1 */
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errno = EILSEQ;
|
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return -1;
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}
|
|
(*inbytesleft) -= 2;
|
|
(*outbytesleft) -= 1;
|
|
(*inbuf) += 2;
|
|
(*outbuf) += 1;
|
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}
|
|
|
|
if (*inbytesleft == 1) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
if (*inbytesleft > 1) {
|
|
errno = E2BIG;
|
|
return -1;
|
|
}
|
|
|
|
return ir_count;
|
|
}
|
|
|
|
static size_t ucs2hex_pull(void *cd, const char **inbuf, size_t *inbytesleft,
|
|
char **outbuf, size_t *outbytesleft)
|
|
{
|
|
while (*inbytesleft >= 1 && *outbytesleft >= 2) {
|
|
uint64_t v;
|
|
NTSTATUS status;
|
|
if ((*inbuf)[0] != '@') {
|
|
/* seven bit ascii case */
|
|
(*outbuf)[0] = (*inbuf)[0];
|
|
(*outbuf)[1] = 0;
|
|
(*inbytesleft) -= 1;
|
|
(*outbytesleft) -= 2;
|
|
(*inbuf) += 1;
|
|
(*outbuf) += 2;
|
|
continue;
|
|
}
|
|
/* it's a hex character */
|
|
if (*inbytesleft < 5) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
status = read_hex_bytes(&(*inbuf)[1], 4, &v);
|
|
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
errno = EILSEQ;
|
|
return -1;
|
|
}
|
|
|
|
(*outbuf)[0] = v&0xff;
|
|
(*outbuf)[1] = v>>8;
|
|
(*inbytesleft) -= 5;
|
|
(*outbytesleft) -= 2;
|
|
(*inbuf) += 5;
|
|
(*outbuf) += 2;
|
|
}
|
|
|
|
if (*inbytesleft > 0) {
|
|
errno = E2BIG;
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static size_t ucs2hex_push(void *cd, const char **inbuf, size_t *inbytesleft,
|
|
char **outbuf, size_t *outbytesleft)
|
|
{
|
|
while (*inbytesleft >= 2 && *outbytesleft >= 1) {
|
|
char buf[6];
|
|
|
|
if ((*inbuf)[1] == 0 &&
|
|
((*inbuf)[0] & 0x80) == 0 &&
|
|
(*inbuf)[0] != '@') {
|
|
(*outbuf)[0] = (*inbuf)[0];
|
|
(*inbytesleft) -= 2;
|
|
(*outbytesleft) -= 1;
|
|
(*inbuf) += 2;
|
|
(*outbuf) += 1;
|
|
continue;
|
|
}
|
|
if (*outbytesleft < 5) {
|
|
errno = E2BIG;
|
|
return -1;
|
|
}
|
|
snprintf(buf, 6, "@%04x", SVAL(*inbuf, 0));
|
|
memcpy(*outbuf, buf, 5);
|
|
(*inbytesleft) -= 2;
|
|
(*outbytesleft) -= 5;
|
|
(*inbuf) += 2;
|
|
(*outbuf) += 5;
|
|
}
|
|
|
|
if (*inbytesleft == 1) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
if (*inbytesleft > 1) {
|
|
errno = E2BIG;
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static size_t iconv_swab(void *cd, const char **inbuf, size_t *inbytesleft,
|
|
char **outbuf, size_t *outbytesleft)
|
|
{
|
|
int n;
|
|
|
|
n = MIN(*inbytesleft, *outbytesleft);
|
|
|
|
swab(*inbuf, *outbuf, (n&~1));
|
|
if (n&1) {
|
|
(*outbuf)[n-1] = 0;
|
|
}
|
|
|
|
(*inbytesleft) -= n;
|
|
(*outbytesleft) -= n;
|
|
(*inbuf) += n;
|
|
(*outbuf) += n;
|
|
|
|
if (*inbytesleft > 0) {
|
|
errno = E2BIG;
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static size_t iconv_copy(void *cd, const char **inbuf, size_t *inbytesleft,
|
|
char **outbuf, size_t *outbytesleft)
|
|
{
|
|
int n;
|
|
|
|
n = MIN(*inbytesleft, *outbytesleft);
|
|
|
|
memmove(*outbuf, *inbuf, n);
|
|
|
|
(*inbytesleft) -= n;
|
|
(*outbytesleft) -= n;
|
|
(*inbuf) += n;
|
|
(*outbuf) += n;
|
|
|
|
if (*inbytesleft > 0) {
|
|
errno = E2BIG;
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
this takes a UTF8 sequence and produces a UTF16 sequence
|
|
*/
|
|
static size_t utf8_pull(void *cd, const char **inbuf, size_t *inbytesleft,
|
|
char **outbuf, size_t *outbytesleft)
|
|
{
|
|
size_t in_left=*inbytesleft, out_left=*outbytesleft;
|
|
const uint8_t *c = (const uint8_t *)*inbuf;
|
|
uint8_t *uc = (uint8_t *)*outbuf;
|
|
|
|
while (in_left >= 1 && out_left >= 2) {
|
|
if ((c[0] & 0x80) == 0) {
|
|
uc[0] = c[0];
|
|
uc[1] = 0;
|
|
c += 1;
|
|
in_left -= 1;
|
|
out_left -= 2;
|
|
uc += 2;
|
|
continue;
|
|
}
|
|
|
|
if ((c[0] & 0xe0) == 0xc0) {
|
|
if (in_left < 2 ||
|
|
(c[1] & 0xc0) != 0x80) {
|
|
errno = EILSEQ;
|
|
goto error;
|
|
}
|
|
uc[1] = (c[0]>>2) & 0x7;
|
|
uc[0] = (c[0]<<6) | (c[1]&0x3f);
|
|
c += 2;
|
|
in_left -= 2;
|
|
out_left -= 2;
|
|
uc += 2;
|
|
continue;
|
|
}
|
|
|
|
if ((c[0] & 0xf0) == 0xe0) {
|
|
if (in_left < 3 ||
|
|
(c[1] & 0xc0) != 0x80 ||
|
|
(c[2] & 0xc0) != 0x80) {
|
|
errno = EILSEQ;
|
|
goto error;
|
|
}
|
|
uc[1] = ((c[0]&0xF)<<4) | ((c[1]>>2)&0xF);
|
|
uc[0] = (c[1]<<6) | (c[2]&0x3f);
|
|
c += 3;
|
|
in_left -= 3;
|
|
out_left -= 2;
|
|
uc += 2;
|
|
continue;
|
|
}
|
|
|
|
if ((c[0] & 0xf8) == 0xf0) {
|
|
unsigned int codepoint;
|
|
if (in_left < 4 ||
|
|
(c[1] & 0xc0) != 0x80 ||
|
|
(c[2] & 0xc0) != 0x80 ||
|
|
(c[3] & 0xc0) != 0x80) {
|
|
errno = EILSEQ;
|
|
goto error;
|
|
}
|
|
codepoint =
|
|
(c[3]&0x3f) |
|
|
((c[2]&0x3f)<<6) |
|
|
((c[1]&0x3f)<<12) |
|
|
((c[0]&0x7)<<18);
|
|
if (codepoint < 0x10000) {
|
|
/* accept UTF-8 characters that are not
|
|
minimally packed, but pack the result */
|
|
uc[0] = (codepoint & 0xFF);
|
|
uc[1] = (codepoint >> 8);
|
|
c += 4;
|
|
in_left -= 4;
|
|
out_left -= 2;
|
|
uc += 2;
|
|
continue;
|
|
}
|
|
|
|
codepoint -= 0x10000;
|
|
|
|
if (out_left < 4) {
|
|
errno = E2BIG;
|
|
goto error;
|
|
}
|
|
|
|
uc[0] = (codepoint>>10) & 0xFF;
|
|
uc[1] = (codepoint>>18) | 0xd8;
|
|
uc[2] = codepoint & 0xFF;
|
|
uc[3] = ((codepoint>>8) & 0x3) | 0xdc;
|
|
c += 4;
|
|
in_left -= 4;
|
|
out_left -= 4;
|
|
uc += 4;
|
|
continue;
|
|
}
|
|
|
|
/* we don't handle 5 byte sequences */
|
|
errno = EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
if (in_left > 0) {
|
|
errno = E2BIG;
|
|
goto error;
|
|
}
|
|
|
|
*inbytesleft = in_left;
|
|
*outbytesleft = out_left;
|
|
*inbuf = (const char *)c;
|
|
*outbuf = (char *)uc;
|
|
return 0;
|
|
|
|
error:
|
|
*inbytesleft = in_left;
|
|
*outbytesleft = out_left;
|
|
*inbuf = (const char *)c;
|
|
*outbuf = (char *)uc;
|
|
return -1;
|
|
}
|
|
|
|
|
|
/*
|
|
this takes a UTF16 sequence and produces a UTF8 sequence
|
|
*/
|
|
static size_t utf8_push(void *cd, const char **inbuf, size_t *inbytesleft,
|
|
char **outbuf, size_t *outbytesleft)
|
|
{
|
|
size_t in_left=*inbytesleft, out_left=*outbytesleft;
|
|
uint8_t *c = (uint8_t *)*outbuf;
|
|
const uint8_t *uc = (const uint8_t *)*inbuf;
|
|
|
|
while (in_left >= 2 && out_left >= 1) {
|
|
unsigned int codepoint;
|
|
|
|
if (uc[1] == 0 && !(uc[0] & 0x80)) {
|
|
/* simplest case */
|
|
c[0] = uc[0];
|
|
in_left -= 2;
|
|
out_left -= 1;
|
|
uc += 2;
|
|
c += 1;
|
|
continue;
|
|
}
|
|
|
|
if ((uc[1]&0xf8) == 0) {
|
|
/* next simplest case */
|
|
if (out_left < 2) {
|
|
errno = E2BIG;
|
|
goto error;
|
|
}
|
|
c[0] = 0xc0 | (uc[0]>>6) | (uc[1]<<2);
|
|
c[1] = 0x80 | (uc[0] & 0x3f);
|
|
in_left -= 2;
|
|
out_left -= 2;
|
|
uc += 2;
|
|
c += 2;
|
|
continue;
|
|
}
|
|
|
|
if ((uc[1] & 0xfc) == 0xdc) {
|
|
errno = EILSEQ;
|
|
#ifndef HAVE_ICONV_ERRNO_ILLEGAL_MULTIBYTE
|
|
if (in_left < 4) {
|
|
errno = EINVAL;
|
|
}
|
|
#endif
|
|
goto error;
|
|
}
|
|
|
|
if ((uc[1] & 0xfc) != 0xd8) {
|
|
codepoint = uc[0] | (uc[1]<<8);
|
|
if (out_left < 3) {
|
|
errno = E2BIG;
|
|
goto error;
|
|
}
|
|
c[0] = 0xe0 | (codepoint >> 12);
|
|
c[1] = 0x80 | ((codepoint >> 6) & 0x3f);
|
|
c[2] = 0x80 | (codepoint & 0x3f);
|
|
|
|
in_left -= 2;
|
|
out_left -= 3;
|
|
uc += 2;
|
|
c += 3;
|
|
continue;
|
|
}
|
|
|
|
/* its the first part of a 4 byte sequence */
|
|
if (in_left < 4) {
|
|
errno = EINVAL;
|
|
goto error;
|
|
}
|
|
if ((uc[3] & 0xfc) != 0xdc) {
|
|
errno = EILSEQ;
|
|
goto error;
|
|
}
|
|
codepoint = 0x10000 + (uc[2] | ((uc[3] & 0x3)<<8) |
|
|
(uc[0]<<10) | ((uc[1] & 0x3)<<18));
|
|
|
|
if (out_left < 4) {
|
|
errno = E2BIG;
|
|
goto error;
|
|
}
|
|
c[0] = 0xf0 | (codepoint >> 18);
|
|
c[1] = 0x80 | ((codepoint >> 12) & 0x3f);
|
|
c[2] = 0x80 | ((codepoint >> 6) & 0x3f);
|
|
c[3] = 0x80 | (codepoint & 0x3f);
|
|
|
|
in_left -= 4;
|
|
out_left -= 4;
|
|
uc += 4;
|
|
c += 4;
|
|
}
|
|
|
|
if (in_left == 1) {
|
|
errno = EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
if (in_left > 1) {
|
|
errno = E2BIG;
|
|
goto error;
|
|
}
|
|
|
|
*inbytesleft = in_left;
|
|
*outbytesleft = out_left;
|
|
*inbuf = (const char *)uc;
|
|
*outbuf = (char *)c;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
*inbytesleft = in_left;
|
|
*outbytesleft = out_left;
|
|
*inbuf = (const char *)uc;
|
|
*outbuf = (char *)c;
|
|
return -1;
|
|
}
|
|
|
|
|
|
/*
|
|
this takes a UTF16 munged sequence, modifies it according to the
|
|
string2key rules, and produces a UTF16 sequence
|
|
|
|
The rules are:
|
|
|
|
1) any 0x0000 characters are mapped to 0x0001
|
|
|
|
2) convert any instance of 0xD800 - 0xDBFF (high surrogate)
|
|
without an immediately following 0xDC00 - 0x0xDFFF (low surrogate) to
|
|
U+FFFD (OBJECT REPLACEMENT CHARACTER).
|
|
|
|
3) the same for any low surrogate that was not preceded by a high surrogate.
|
|
|
|
*/
|
|
static size_t utf16_munged_pull(void *cd, const char **inbuf, size_t *inbytesleft,
|
|
char **outbuf, size_t *outbytesleft)
|
|
{
|
|
size_t in_left=*inbytesleft, out_left=*outbytesleft;
|
|
uint8_t *c = (uint8_t *)*outbuf;
|
|
const uint8_t *uc = (const uint8_t *)*inbuf;
|
|
|
|
while (in_left >= 2 && out_left >= 2) {
|
|
unsigned int codepoint = uc[0] | (uc[1]<<8);
|
|
|
|
if (codepoint == 0) {
|
|
codepoint = 1;
|
|
}
|
|
|
|
if ((codepoint & 0xfc00) == 0xd800) {
|
|
/* a high surrogate */
|
|
unsigned int codepoint2;
|
|
if (in_left < 4) {
|
|
codepoint = 0xfffd;
|
|
goto codepoint16;
|
|
}
|
|
codepoint2 = uc[2] | (uc[3]<<8);
|
|
if ((codepoint2 & 0xfc00) != 0xdc00) {
|
|
/* high surrogate not followed by low
|
|
surrogate: convert to 0xfffd */
|
|
codepoint = 0xfffd;
|
|
goto codepoint16;
|
|
}
|
|
if (out_left < 4) {
|
|
errno = E2BIG;
|
|
goto error;
|
|
}
|
|
memcpy(c, uc, 4);
|
|
in_left -= 4;
|
|
out_left -= 4;
|
|
uc += 4;
|
|
c += 4;
|
|
continue;
|
|
}
|
|
|
|
if ((codepoint & 0xfc00) == 0xdc00) {
|
|
/* low surrogate not preceded by high
|
|
surrogate: convert to 0xfffd */
|
|
codepoint = 0xfffd;
|
|
}
|
|
|
|
codepoint16:
|
|
c[0] = codepoint & 0xFF;
|
|
c[1] = (codepoint>>8) & 0xFF;
|
|
|
|
in_left -= 2;
|
|
out_left -= 2;
|
|
uc += 2;
|
|
c += 2;
|
|
continue;
|
|
}
|
|
|
|
if (in_left == 1) {
|
|
errno = EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
if (in_left > 1) {
|
|
errno = E2BIG;
|
|
goto error;
|
|
}
|
|
|
|
*inbytesleft = in_left;
|
|
*outbytesleft = out_left;
|
|
*inbuf = (const char *)uc;
|
|
*outbuf = (char *)c;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
*inbytesleft = in_left;
|
|
*outbytesleft = out_left;
|
|
*inbuf = (const char *)uc;
|
|
*outbuf = (char *)c;
|
|
return -1;
|
|
}
|
|
|
|
|
|
|