xslibraryloader.c

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//  Copyright (c) 2003-2021 Xsens Technologies B.V. or subsidiaries worldwide.
//  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 names of the copyright holders nor the names of their contributors
//      may be used to endorse or promote products derived from this software without
//      specific prior written permission.
//  
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDERS 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.THE LAWS OF THE NETHERLANDS 
//  SHALL BE EXCLUSIVELY APPLICABLE AND ANY DISPUTES SHALL BE FINALLY SETTLED UNDER THE RULES 
//  OF ARBITRATION OF THE INTERNATIONAL CHAMBER OF COMMERCE IN THE HAGUE BY ONE OR MORE 
//  ARBITRATORS APPOINTED IN ACCORDANCE WITH SAID RULES.
//  
 
 
//  Copyright (c) 2003-2021 Xsens Technologies B.V. or subsidiaries worldwide.
//  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 names of the copyright holders nor the names of their contributors
//      may be used to endorse or promote products derived from this software without
//      specific prior written permission.
//  
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDERS 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.THE LAWS OF THE NETHERLANDS 
//  SHALL BE EXCLUSIVELY APPLICABLE AND ANY DISPUTES SHALL BE FINALLY SETTLED UNDER THE RULES 
//  OF ARBITRATION OF THE INTERNATIONAL CHAMBER OF COMMERCE IN THE HAGUE BY ONE OR MORE 
//  ARBITRATORS APPOINTED IN ACCORDANCE WITH SAID RULES.
//  
 
#include "xslibraryloader.h"
#include "xsstring.h"
 
#ifdef __GNUC__
        #include <dlfcn.h>
#elif defined(_MSC_VER)
        #include <Windows.h>
#endif
 
int XsLibraryLoader_load(XsLibraryLoader* thisp, const XsString* libraryName)
{
#ifdef __GNUC__
        if (XsLibraryLoader_isLoaded(thisp))
                return 0;
        thisp->m_handle = dlopen(libraryName->m_data, RTLD_LAZY);
#elif defined(_MSC_VER)
        wchar_t* libraryNameW;
        XsSize required;
        if (XsLibraryLoader_isLoaded(thisp))
                return 0;
        required = XsString_copyToWCharArray(libraryName, NULL, 0);
        libraryNameW = (wchar_t*)malloc(required * sizeof(wchar_t));
 
        (void)XsString_copyToWCharArray(libraryName, libraryNameW, required);
 
        thisp->m_handle = LoadLibrary(libraryNameW);
 
        free(libraryNameW);
#endif
        return XsLibraryLoader_isLoaded(thisp);
}
 
void* XsLibraryLoader_resolve(const XsLibraryLoader* thisp, const char* functionName)
{
#ifdef __GNUC__
        return dlsym(thisp->m_handle, functionName);
#elif defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable: 4152)
        return GetProcAddress(thisp->m_handle, functionName);
#pragma warning(pop)
#endif
}
 
int XsLibraryLoader_unload(XsLibraryLoader* thisp)
{
        void* handle = thisp->m_handle;
        thisp->m_handle = NULL;
        if (handle)
        {
#ifdef __GNUC__
                return dlclose(handle) == 0;
#elif defined(_MSC_VER)
                return FreeLibrary(handle) != 0;
#endif
        }
        return 0;
}
 
int XsLibraryLoader_isLoaded(const XsLibraryLoader* thisp)
{
        return thisp->m_handle != NULL;
}
 
void XsLibraryLoader_getErrorString(XsString* error)
{
#ifdef __GNUC__
        XsString_assignCharArray(error, dlerror());
#elif defined(_MSC_VER)
        LPTSTR errorText = NULL;
        (void)FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM
                | FORMAT_MESSAGE_ALLOCATE_BUFFER
                | FORMAT_MESSAGE_IGNORE_INSERTS,
                NULL,
                GetLastError(),
                MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                (LPTSTR)&errorText,
                0,
                NULL);
 
        XsString_assignWCharArray(error, errorText);
        LocalFree(errorText);
#endif
}