config/Param: add method GetPath()

Move code from config_parse_path().

src/Listen.cxx

@@ -68,7 +68,7 @@ listen_add_config_param(unsigned int port,
 	if (0 == strcmp(param->value.c_str(), "any")) {
 		return listen_socket->AddPort(port, error_r);
 	} else if (param->value[0] == '/' || param->value[0] == '~') {
-		auto path = config_parse_path(param, error_r);
+		auto path = param->GetPath(error_r);
 		return !path.IsNull() &&
 			listen_socket->AddPath(std::move(path), error_r);
 	} else {

src/config/ConfigGlobal.cxx

@@ -128,18 +128,7 @@ config_get_path(ConfigOption option, Error &error)
 	if (param == nullptr)
 		return AllocatedPath::Null();
 
-	return config_parse_path(param, error);
-}
-
-AllocatedPath
-config_parse_path(const ConfigParam *param, Error & error)
-{
-	AllocatedPath path = ParsePath(param->value.c_str(), error);
-	if (gcc_unlikely(path.IsNull()))
-		error.FormatPrefix("Invalid path at line %i: ",
-				   param->line);
-
-	return path;
+	return param->GetPath(error);
 }
 
 unsigned

src/config/ConfigGlobal.hxx

@@ -84,14 +84,6 @@ config_get_string(enum ConfigOption option, const char *default_value=nullptr);
 AllocatedPath
 config_get_path(enum ConfigOption option, Error &error);
 
-/**
- * Parse a configuration parameter as a path.
- * If there is a tilde prefix, it is expanded. If the path could
- * not be parsed, returns AllocatedPath::Null() and sets the error.
- */
-AllocatedPath
-config_parse_path(const ConfigParam *param, Error & error_r);
-
 gcc_pure
 unsigned
 config_get_unsigned(enum ConfigOption option, unsigned default_value);

src/config/Param.cxx

@@ -19,6 +19,9 @@
 
 #include "config.h"
 #include "Param.hxx"
+#include "ConfigPath.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "util/Error.hxx"
 
 ConfigParam::ConfigParam(const char *_value, int _line)
 	:next(nullptr), value(_value), line(_line), used(false) {}
@@ -27,3 +30,14 @@ ConfigParam::~ConfigParam()
 {
 	delete next;
 }
+
+AllocatedPath
+ConfigParam::GetPath(Error &error) const
+{
+	auto path = ParsePath(value.c_str(), error);
+	if (gcc_unlikely(path.IsNull()))
+		error.FormatPrefix("Invalid path at line %i: ", line);
+
+	return path;
+
+}

src/config/Param.hxx

@@ -25,6 +25,9 @@
 
 #include <string>
 
+class Error;
+class AllocatedPath;
+
 struct ConfigParam {
 	/**
 	 * The next ConfigParam with the same name.  The destructor
@@ -62,6 +65,13 @@ struct ConfigParam {
 	bool IsNull() const {
 		return line < 0;
 	}
+
+	/**
+	 * Parse the value as a path.  If there is a tilde prefix, it
+	 * is expanded.  If the path could not be parsed, returns
+	 * AllocatedPath::Null() and sets the error.
+	 */
+	AllocatedPath GetPath(Error &error) const;
 };
 
 #endif