X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/8c6fa3fbaccc22127280bf77a48fab5a3ee0716e..46b0747592074017ff0ea4b33d4a7194235886e5:/sgconf/utils.h

diff --git a/sgconf/utils.h b/sgconf/utils.h
new file mode 100644
index 00000000..3793c9cd
--- /dev/null
+++ b/sgconf/utils.h
@@ -0,0 +1,48 @@
+#ifndef __STG_SGCONF_UTILS_H__
+#define __STG_SGCONF_UTILS_H__
+
+#include "stg/common.h"
+#include "stg/resetable.h"
+
+#include <string>
+#include <map>
+
+namespace SGCONF
+{
+
+template <typename T>
+inline
+void MaybeSet(const std::map<std::string, std::string> & options, const std::string & name, RESETABLE<T> & res)
+{
+std::map<std::string, std::string>::const_iterator it(options.find(name));
+if (it == options.end())
+    return;
+T value;
+if (str2x(it->second, value) < 0)
+    return;
+res = value;
+}
+
+template <typename T, typename F>
+inline
+void MaybeSet(const std::map<std::string, std::string> & options, const std::string & name, T & res, F conv)
+{
+std::map<std::string, std::string>::const_iterator it(options.find(name));
+if (it == options.end())
+    return;
+conv(it->second, res);
+}
+
+template <>
+inline
+void MaybeSet<std::string>(const std::map<std::string, std::string> & options, const std::string & name, RESETABLE<std::string> & res)
+{
+std::map<std::string, std::string>::const_iterator it(options.find(name));
+if (it == options.end())
+    return;
+res = it->second;
+}
+
+} // namespace SGCONF
+
+#endif