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/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
/*
* Copyright (c) 1993, 1994, 1995, 1996, 1997
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Computer Systems
* Engineering Group at Lawrence Berkeley Laboratory.
* 4. Neither the name of the University nor of the Laboratory 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.
*/
#ifdef _WIN32
#include <stdio.h>
#include <errno.h>
#include <pcap/pcap.h> /* Needed for PCAP_ERRBUF_SIZE */
#include "charconv.h"
wchar_t *
cp_to_utf_16le(UINT codepage, const char *cp_string, DWORD flags)
{
int utf16le_len;
wchar_t *utf16le_string;
/*
* Map from the specified code page to UTF-16LE.
* First, find out how big a buffer we'll need.
*/
utf16le_len = MultiByteToWideChar(codepage, flags, cp_string, -1,
NULL, 0);
if (utf16le_len == 0) {
/*
* Error. Fail with EINVAL.
*/
errno = EINVAL;
return (NULL);
}
/*
* Now attempt to allocate a buffer for that.
*/
utf16le_string = malloc(utf16le_len * sizeof (wchar_t));
if (utf16le_string == NULL) {
/*
* Not enough memory; assume errno has been
* set, and fail.
*/
return (NULL);
}
/*
* Now convert.
*/
utf16le_len = MultiByteToWideChar(codepage, flags, cp_string, -1,
utf16le_string, utf16le_len);
if (utf16le_len == 0) {
/*
* Error. Fail with EINVAL.
* XXX - should this ever happen, given that
* we already ran the string through
* MultiByteToWideChar() to find out how big
* a buffer we needed?
*/
free(utf16le_string);
errno = EINVAL;
return (NULL);
}
return (utf16le_string);
}
char *
utf_16le_to_cp(UINT codepage, const wchar_t *utf16le_string)
{
int cp_len;
char *cp_string;
/*
* Map from UTF-16LE to the specified code page.
* First, find out how big a buffer we'll need.
* We convert composite characters to precomposed characters,
* as that's what Windows expects.
*/
cp_len = WideCharToMultiByte(codepage, WC_COMPOSITECHECK,
utf16le_string, -1, NULL, 0, NULL, NULL);
if (cp_len == 0) {
/*
* Error. Fail with EINVAL.
*/
errno = EINVAL;
return (NULL);
}
/*
* Now attempt to allocate a buffer for that.
*/
cp_string = malloc(cp_len * sizeof (char));
if (cp_string == NULL) {
/*
* Not enough memory; assume errno has been
* set, and fail.
*/
return (NULL);
}
/*
* Now convert.
*/
cp_len = WideCharToMultiByte(codepage, WC_COMPOSITECHECK,
utf16le_string, -1, cp_string, cp_len, NULL, NULL);
if (cp_len == 0) {
/*
* Error. Fail with EINVAL.
* XXX - should this ever happen, given that
* we already ran the string through
* WideCharToMultiByte() to find out how big
* a buffer we needed?
*/
free(cp_string);
errno = EINVAL;
return (NULL);
}
return (cp_string);
}
/*
* Convert an error message string from UTF-8 to the local code page, as
* best we can.
*
* The buffer is assumed to be PCAP_ERRBUF_SIZE bytes long; we truncate
* if it doesn't fit.
*/
void
utf_8_to_acp_truncated(char *errbuf)
{
wchar_t *utf_16_errbuf;
int retval;
DWORD err;
/*
* Do this by converting to UTF-16LE and then to the local
* code page. That means we get to use Microsoft's
* conversion routines, rather than having to understand
* all the code pages ourselves, *and* that this routine
* can convert in place.
*/
/*
* Map from UTF-8 to UTF-16LE.
* First, find out how big a buffer we'll need.
* Convert any invalid characters to REPLACEMENT CHARACTER.
*/
utf_16_errbuf = cp_to_utf_16le(CP_UTF8, errbuf, 0);
if (utf_16_errbuf == NULL) {
/*
* Error. Give up.
*/
snprintf(errbuf, PCAP_ERRBUF_SIZE,
"Can't convert error string to the local code page");
return;
}
/*
* Now, convert that to the local code page.
* Use the current thread's code page. For unconvertable
* characters, let it pick the "best fit" character.
*
* XXX - we'd like some way to do what utf_16le_to_utf_8_truncated()
* does if the buffer isn't big enough, but we don't want to have
* to handle all local code pages ourselves; doing so requires
* knowledge of all those code pages, including knowledge of how
* characters are formed in thoe code pages so that we can avoid
* cutting a multi-byte character into pieces.
*
* Converting to an un-truncated string using Windows APIs, and
* then copying to the buffer, still requires knowledge of how
* characters are formed in the target code page.
*/
retval = WideCharToMultiByte(CP_THREAD_ACP, 0, utf_16_errbuf, -1,
errbuf, PCAP_ERRBUF_SIZE, NULL, NULL);
if (retval == 0) {
err = GetLastError();
free(utf_16_errbuf);
if (err == ERROR_INSUFFICIENT_BUFFER)
snprintf(errbuf, PCAP_ERRBUF_SIZE,
"The error string, in the local code page, didn't fit in the buffer");
else
snprintf(errbuf, PCAP_ERRBUF_SIZE,
"Can't convert error string to the local code page");
return;
}
free(utf_16_errbuf);
}
#endif
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