barrier/lib/arch/CMultibyteEmu.cpp

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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2002 Chris Schoeneman
*
* This package is free software you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "CArch.h"
#include <string.h>
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#if HAVE_WCHAR_H
# include <wchar.h>
#elif __APPLE__
// wtf? Darwin puts mbtowc() et al. in stdlib
# include <stdlib.h>
#else
// platform apparently has no wchar_t support. provide dummy
// implementations. hopefully at least the C++ compiler has
// a built-in wchar_t type.
# undef HAVE_MBSINIT
static inline
int
mbtowc(wchar_t* dst, const char* src, int n)
{
*dst = static_cast<wchar_t>(*src);
return 1;
}
static inline
int
wctomb(char* dst, wchar_t src)
{
*dst = static_cast<char>(src);
return 1;
}
#endif
class CArchMBStateImpl {
public:
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#if HAVE_MBSINIT
mbstate_t m_mbstate;
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#else
int m_mbstate; // dummy data
#endif
};
//
// use C library non-reentrant multibyte conversion with mutex
//
static CArchMutex s_mutex;
static
void
initMB()
{
s_mutex = ARCH->newMutex();
}
static
void
cleanMB()
{
ARCH->closeMutex(s_mutex);
}
void
ARCH_STRING::initMBState(CArchMBState state)
{
memset(&state->m_mbstate, 0, sizeof(state->m_mbstate));
}
bool
ARCH_STRING::isInitMBState(CArchMBState state)
{
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// if we're using this file mbsinit() probably doesn't exist
// but use it if it does
#if HAVE_MBSINIT
return (mbsinit(&state->m_mbstate) != 0);
#else
return true;
#endif
}
int
ARCH_STRING::convMBToWC(wchar_t* dst, const char* src, int n, CArchMBState)
{
wchar_t dummy;
ARCH->lockMutex(s_mutex);
int result = mbtowc(dst != NULL ? dst : &dummy, src, n);
ARCH->unlockMutex(s_mutex);
if (result < 0)
return -1;
else
return result;
}
int
ARCH_STRING::convWCToMB(char* dst, wchar_t src, CArchMBState)
{
char dummy[MB_LEN_MAX];
ARCH->lockMutex(s_mutex);
int n = wctomb(dst != NULL ? dst : dummy, src);
ARCH->unlockMutex(s_mutex);
return n;
}