Function getCudaSupportLibName

deps/opencv/modules/core/src/gpumat.cpp:113–179

#  ifdef ANDROID
static const std::string getCudaSupportLibName()
{
    Dl_info dl_info;
    if(0 != dladdr((void *)getCudaSupportLibName, &dl_info))
    {
        LOGD("Library name: %s", dl_info.dli_fname);
        LOGD("Library base address: %p", dl_info.dli_fbase);

        const char* libName=dl_info.dli_fname;
        while( ((*libName)=='/') || ((*libName)=='.') )
        libName++;

        char lineBuf[2048];
        FILE* file = fopen("/proc/self/smaps", "rt");

        if(file)
        {
            while (fgets(lineBuf, sizeof lineBuf, file) != NULL)
            {
                //verify that line ends with library name
                int lineLength = strlen(lineBuf);
                int libNameLength = strlen(libName);

                //trim end
                for(int i = lineLength - 1; i >= 0 && isspace(lineBuf[i]); --i)
                {
                    lineBuf[i] = 0;
                    --lineLength;
                }

                if (0 != strncmp(lineBuf + lineLength - libNameLength, libName, libNameLength))
                {
                //the line does not contain the library name
                    continue;
                }

                //extract path from smaps line
                char* pathBegin = strchr(lineBuf, '/');
                if (0 == pathBegin)
                {
                    LOGE("Strange error: could not find path beginning in lin \"%s\"", lineBuf);
                    continue;
                }

                char* pathEnd = strrchr(pathBegin, '/');
                pathEnd[1] = 0;

                LOGD("Libraries folder found: %s", pathBegin);

                fclose(file);
                return std::string(pathBegin) + DYNAMIC_CUDA_LIB_NAME;
            }
            fclose(file);
            LOGE("Could not find library path");
        }
        else
        {
            LOGE("Could not read /proc/self/smaps");