db/upnp/Device: replace std::vector with a std::string pointer

src/db/upnp/Device.cxx

@@ -33,61 +33,64 @@
  */
 class UPnPDeviceParser final : public CommonExpatParser {
 	UPnPDevice &m_device;
-	std::vector<std::string> m_path;
+
+	std::string *value;
+
 	UPnPService m_tservice;
 
 public:
 	UPnPDeviceParser(UPnPDevice& device)
-		:m_device(device) {}
+		:m_device(device),
+		 value(nullptr) {}
 
 protected:
 	virtual void StartElement(const XML_Char *name, const XML_Char **) {
-		m_path.push_back(name);
-	}
-
-	virtual void EndElement(const XML_Char *name) {
-		if (!strcmp(name, "service")) {
-			m_device.services.emplace_back(std::move(m_tservice));
-			m_tservice.clear();
-		}
-
-		m_path.pop_back();
-	}
-
-	virtual void CharacterData(const XML_Char *s, int len) {
-		const auto &current = m_path.back();
-		std::string str = trimstring(s, len);
-		switch (current[0]) {
+		switch (name[0]) {
 		case 'c':
-			if (!current.compare("controlURL"))
-				m_tservice.controlURL = std::move(str);
+			if (strcmp(name, "controlURL") == 0)
+				value = &m_tservice.controlURL;
 			break;
 		case 'd':
-			if (!current.compare("deviceType"))
-				m_device.deviceType = std::move(str);
+			if (strcmp(name, "deviceType") == 0)
+				value = &m_device.deviceType;
 			break;
 		case 'f':
-			if (!current.compare("friendlyName"))
-				m_device.friendlyName = std::move(str);
+			if (strcmp(name, "friendlyName") == 0)
+				value = &m_device.friendlyName;
 			break;
 		case 'm':
-			if (!current.compare("manufacturer"))
-				m_device.manufacturer = std::move(str);
-			else if (!current.compare("modelName"))
-				m_device.modelName = std::move(str);
+			if (strcmp(name, "manufacturer") == 0)
+				value = &m_device.manufacturer;
+			else if (strcmp(name, "modelName") == 0)
+				value = &m_device.modelName;
 			break;
 		case 's':
-			if (!current.compare("serviceType"))
-				m_tservice.serviceType = std::move(str);
+			if (strcmp(name, "serviceType") == 0)
+				value = &m_tservice.serviceType;
 			break;
 		case 'U':
-			if (!current.compare("UDN"))
-				m_device.UDN = std::move(str);
-			else if (!current.compare("URLBase"))
-				m_device.URLBase = std::move(str);
+			if (strcmp(name, "UDN") == 0)
+				value = &m_device.UDN;
+			else if (strcmp(name, "URLBase") == 0)
+				value = &m_device.URLBase;
 			break;
 		}
 	}
+
+	virtual void EndElement(const XML_Char *name) {
+		if (value != nullptr) {
+			trimstring(*value);
+			value = nullptr;
+		} else if (!strcmp(name, "service")) {
+			m_device.services.emplace_back(std::move(m_tservice));
+			m_tservice.clear();
+		}
+	}
+
+	virtual void CharacterData(const XML_Char *s, int len) {
+		if (value != nullptr)
+			value->append(s, len);
+	}
 };
 
 bool

src/db/upnp/Util.cxx

@@ -18,7 +18,6 @@
  */
 
 #include "Util.hxx"
-#include "util/CharUtil.hxx"
 
 #include <string>
 #include <map>
@@ -28,17 +27,19 @@
 #include <upnp/ixml.h>
 
 /** Get rid of white space at both ends */
-std::string
-trimstring(const char *p, size_t length)
+void
+trimstring(std::string &s, const char *ws)
 {
-	while (length > 0 && IsWhitespaceOrNull(p[length - 1]))
-		--length;
-
-	const char *end = p + length;
-	while (p != end && IsWhitespaceOrNull(*p))
-		++p;
+	auto pos = s.find_first_not_of(ws);
+	if (pos == std::string::npos) {
+		s.clear();
+		return;
+	}
+	s.replace(0, pos, std::string());
 
-	return std::string(p, end);
+	pos = s.find_last_not_of(ws);
+	if (pos != std::string::npos && pos != s.length()-1)
+		s.replace(pos + 1, std::string::npos, std::string());
 }
 
 std::string

src/db/upnp/Util.hxx

@@ -28,9 +28,8 @@
 std::string
 caturl(const std::string& s1, const std::string& s2);
 
-gcc_pure
-std::string
-trimstring(const char *p, size_t length);
+void
+trimstring(std::string &s, const char *ws = " \t\n");
 
 std::string
 path_getfather(const std::string &s);