getenv(const char*) because of CRT deprecation
+/// @param varname Variable name to get environment variable value for
+/// @return If variable exist the value of it otherwise nullptr
+const char* OS::getWindowsEnvironmentVariable(const char* varname) {
+ const DWORD bufferLen = 50;
+ static char buffer[bufferLen];
+ if (GetEnvironmentVariableA(varname, buffer, bufferLen)) {
+ return buffer;
+ }
+ return nullptr;
+}
+#endif // ELPP_OS_WINDOWS
+#if ELPP_OS_ANDROID
+std::string OS::getProperty(const char* prop) {
+ char propVal[PROP_VALUE_MAX + 1];
+ int ret = __system_property_get(prop, propVal);
+ return ret == 0 ? std::string() : std::string(propVal);
+}
+
+std::string OS::getDeviceName(void) {
+ std::stringstream ss;
+ std::string manufacturer = getProperty("ro.product.manufacturer");
+ std::string model = getProperty("ro.product.model");
+ if (manufacturer.empty() || model.empty()) {
+ return std::string();
+ }
+ ss << manufacturer << "-" << model;
+ return ss.str();
+}
+#endif // ELPP_OS_ANDROID
+
+const std::string OS::getBashOutput(const char* command) {
+#if (ELPP_OS_UNIX && !ELPP_OS_ANDROID && !ELPP_CYGWIN)
+ if (command == nullptr) {
+ return std::string();
+ }
+ FILE* proc = nullptr;
+ if ((proc = popen(command, "r")) == nullptr) {
+ ELPP_INTERNAL_ERROR("\nUnable to run command [" << command << "]", true);
+ return std::string();
+ }
+ char hBuff[4096];
+ if (fgets(hBuff, sizeof(hBuff), proc) != nullptr) {
+ pclose(proc);
+ const std::size_t buffLen = strlen(hBuff);
+ if (buffLen > 0 && hBuff[buffLen - 1] == '\n') {
+ hBuff[buffLen - 1] = '\0';
+ }
+ return std::string(hBuff);
+ } else {
+ pclose(proc);
+ }
+ return std::string();
+#else
+ ELPP_UNUSED(command);
+ return std::string();
+#endif // (ELPP_OS_UNIX && !ELPP_OS_ANDROID && !ELPP_CYGWIN)
+}
+
+std::string OS::getEnvironmentVariable(const char* variableName, const char* defaultVal,
+ const char* alternativeBashCommand) {
+#if ELPP_OS_UNIX
+ const char* val = getenv(variableName);
+#elif ELPP_OS_WINDOWS
+ const char* val = getWindowsEnvironmentVariable(variableName);
+#endif // ELPP_OS_UNIX
+ if ((val == nullptr) || ((strcmp(val, "") == 0))) {
+#if ELPP_OS_UNIX && defined(ELPP_FORCE_ENV_VAR_FROM_BASH)
+ // Try harder on unix-based systems
+ std::string valBash = base::utils::OS::getBashOutput(alternativeBashCommand);
+ if (valBash.empty()) {
+ return std::string(defaultVal);
+ } else {
+ return valBash;
+ }
+#elif ELPP_OS_WINDOWS || ELPP_OS_UNIX
+ ELPP_UNUSED(alternativeBashCommand);
+ return std::string(defaultVal);
+#endif // ELPP_OS_UNIX && defined(ELPP_FORCE_ENV_VAR_FROM_BASH)
+ }
+ return std::string(val);
+}
+
+std::string OS::currentUser(void) {
+#if ELPP_OS_UNIX && !ELPP_OS_ANDROID
+ return getEnvironmentVariable("USER", base::consts::kUnknownUser, "whoami");
+#elif ELPP_OS_WINDOWS
+ return getEnvironmentVariable("USERNAME", base::consts::kUnknownUser);
+#elif ELPP_OS_ANDROID
+ ELPP_UNUSED(base::consts::kUnknownUser);
+ return std::string("android");
+#else
+ return std::string();
+#endif // ELPP_OS_UNIX && !ELPP_OS_ANDROID
+}
+
+std::string OS::currentHost(void) {
+#if ELPP_OS_UNIX && !ELPP_OS_ANDROID
+ return getEnvironmentVariable("HOSTNAME", base::consts::kUnknownHost, "hostname");
+#elif ELPP_OS_WINDOWS
+ return getEnvironmentVariable("COMPUTERNAME", base::consts::kUnknownHost);
+#elif ELPP_OS_ANDROID
+ ELPP_UNUSED(base::consts::kUnknownHost);
+ return getDeviceName();
+#else
+ return std::string();
+#endif // ELPP_OS_UNIX && !ELPP_OS_ANDROID
+}
+
+bool OS::termSupportsColor(void) {
+ std::string term = getEnvironmentVariable("TERM", "");
+ return term == "xterm" || term == "xterm-color" || term == "xterm-256color"
+ || term == "screen" || term == "linux" || term == "cygwin"
+ || term == "screen-256color";
+}
+
+// DateTime
+
+void DateTime::gettimeofday(struct timeval* tv) {
+#if ELPP_OS_WINDOWS
+ if (tv != nullptr) {
+# if ELPP_COMPILER_MSVC || defined(_MSC_EXTENSIONS)
+ const unsigned __int64 delta_ = 11644473600000000Ui64;
+# else
+ const unsigned __int64 delta_ = 11644473600000000ULL;
+# endif // ELPP_COMPILER_MSVC || defined(_MSC_EXTENSIONS)
+ const double secOffSet = 0.000001;
+ const unsigned long usecOffSet = 1000000;
+ FILETIME fileTime;
+ GetSystemTimeAsFileTime(&fileTime);
+ unsigned __int64 present = 0;
+ present |= fileTime.dwHighDateTime;
+ present = present << 32;
+ present |= fileTime.dwLowDateTime;
+ present /= 10; // mic-sec
+ // Subtract the difference
+ present -= delta_;
+ tv->tv_sec = static_cast