initial commit

+io/private/ptycho_reader/env_helper.h

@@ -0,0 +1,34 @@
+#ifndef ENV_HELPER_H
+#define ENV_HELPER_H
+
+/*!
+ * \file
+ * Helper functions for environment parsing
+ */
+
+namespace env {
+
+    /*!
+     * \brief Check if environment variable steered feature is enabled
+     *
+     * \param envvar environment variable name
+     * \return true if feature is enabled
+     */
+    inline bool is_enabled (const std::string &envvar)
+    {
+        char *val = std::getenv(envvar.c_str());
+        if (! val)
+            return false;
+        std::string value(val);
+        if (value == "1")
+            return true;
+        if (value == "yes")
+            return true;
+        if (value == "true")
+            return true;
+        return false;
+    }
+
+} // namespace
+
+#endif