Public interfaces: part 1

[stg.git] / libs / srvconf / parsers / optional_utils.h

diff --git a/libs/srvconf/parsers/optional_utils.h b/libs/srvconf/parsers/optional_utils.h
new file mode 100644 (file)
index 0000000..9b6054b
--- /dev/null
+++ b/libs/srvconf/parsers/optional_utils.h
@@ -0,0 +1,138 @@
+/*
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*
+ *    Author : Maxim Mamontov <faust@stargazer.dp.ua>
+ */
+
+#pragma once
+
+#include "stg/optional.h"
+#include "stg/common.h"
+
+#include <string>
+#include <ostream>
+
+namespace STG
+{
+
+template <typename T>
+inline
+void appendTag(std::ostream& stream, const std::string& name, const T& value)
+{
+    stream << "<" << name << " value=\"" << value << "\"/>";
+}
+
+template <typename T>
+inline
+void appendTag(std::ostream& stream, const std::string& name, size_t suffix, const T& value)
+{
+    stream << "<" << name << suffix << " value=\"" << value << "\"/>";
+}
+
+template <>
+inline
+void appendTag<uint8_t>(std::ostream& stream, const std::string& name, const uint8_t& value)
+{
+    stream << "<" << name << " value=\"" << static_cast<unsigned>(value) << "\"/>";
+}
+
+template <>
+inline
+void appendTag<int8_t>(std::ostream& stream, const std::string& name, const int8_t& value)
+{
+    stream << "<" << name << " value=\"" << static_cast<int>(value) << "\"/>";
+}
+
+template <typename T>
+inline
+void appendAttr(std::ostream& stream, const std::string& name, const T& value)
+{
+    stream << " " << name << "=\"" << value << "\"";
+}
+
+template <typename T>
+inline
+void appendAttr(std::ostream& stream, const std::string& name, size_t suffix, const T& value)
+{
+    stream << " " << name << suffix << "=\"" << value << "\"";
+}
+
+template <>
+inline
+void appendAttr<uint8_t>(std::ostream& stream, const std::string& name, const uint8_t& value)
+{
+    stream << " " << name << "=\"" << static_cast<unsigned>(value) << "\"";
+}
+
+template <>
+inline
+void appendAttr<int8_t>(std::ostream& stream, const std::string& name, const int8_t& value)
+{
+    stream << " " << name << "=\"" << static_cast<int>(value) << "\"";
+}
+
+template <typename T>
+inline
+void appendResetableTag(std::ostream& stream, const std::string& name, const T& value)
+{
+    if (!value.empty())
+        appendTag(stream, name, value.const_data());
+}
+
+template <typename T>
+inline
+void appendResetableTag(std::ostream& stream, const std::string& name, size_t suffix, const T& value)
+{
+    if (!value.empty())
+        appendTag(stream, name, suffix, value.const_data());
+}
+
+template <typename T>
+inline
+void appendResetableAttr(std::ostream& stream, const std::string& name, const T& value)
+{
+    if (!value.empty())
+        appendAttr(stream, name, value.const_data());
+}
+
+template <typename T>
+inline
+void appendResetableAttr(std::ostream& stream, const std::string& name, size_t suffix, const T& value)
+{
+    if (!value.empty())
+        appendAttr(stream, name, suffix, value.const_data());
+}
+
+inline
+Optional<std::string> maybeEncode(const Optional<std::string>& value)
+{
+    Optional<std::string> res;
+    if (!value.empty())
+        res = Encode12str(value.data());
+    return res;
+}
+
+inline
+Optional<std::string> maybeIconv(const Optional<std::string>& value, const std::string& fromEncoding, const std::string& toEncoding)
+{
+    Optional<std::string> res;
+    if (!value.empty())
+        res = IconvString(value.data(), fromEncoding, toEncoding);
+    return res;
+}
+
+} // namespace STG