Add methods to get env vars as an optional

1 files changed, 27 insertions, 0 deletions

diff --git a/common/strutils.cpp b/common/strutils.cpp
new file mode 100644
index 00000000..0163de7b
--- /dev/null
+++ b/common/strutils.cpp
@@ -0,0 +1,27 @@
+
+#include "config.h"
+
+#include "strutils.h"
+
+#include <cstdlib>
+
+
+namespace al {
+
+al::optional<std::string> getenv(const char *envname)
+{
+    const char *str{std::getenv(envname)};
+    if(str && str[0] != '\0') return str;
+    return al::nullopt;
+}
+
+#ifdef _WIN32
+al::optional<std::wstring> getenv(const WCHAR *envname)
+{
+    const WCHAR *str{_wgetenv(envname)};
+    if(str && str[0] != L'\0') return str;
+    return al::nullopt;
+}
+#endif
+
+} // namespace al