move code responsible for replacing content in strings to Replace()

src/conv.cpp

@@ -199,12 +199,9 @@ void EscapeHtml(std::string &s)
 		size_t j = s.find(">")+1;
 		s.replace(i, j-i, "");
 	}
-	for (size_t i = s.find("'"); i != std::string::npos; i = s.find("'"))
-		s.replace(i, static_strlen("'"), "'");
-	for (size_t i = s.find("""); i != std::string::npos; i = s.find("""))
-		s.replace(i, static_strlen("""), "\"");
-	for (size_t i = s.find("&"); i != std::string::npos; i = s.find("&"))
-		s.replace(i, static_strlen("&"), "&");
+	Replace(s, "'", "'");
+	Replace(s, """, "\"");
+	Replace(s, "&", "&");
 	for (size_t i = 0; i < s.length(); ++i)
 	{
 		if (erase)

src/conv.h

@@ -31,6 +31,12 @@ template <size_t N> inline size_t static_strlen(const char (&)[N])
 	return N-1;
 }
 
+template <size_t N> void Replace(std::string &s, const char (&from)[N], const char *to)
+{
+	for (size_t i = 0; (i = s.find(from, i)) != std::string::npos; i += N)
+		s.replace(i, N-1, to);
+}
+
 void ToLower(std::string &);
 
 int StrToInt(const std::string &);

src/helpers.cpp

@@ -315,8 +315,7 @@ std::string GetLineValue(std::string &line, char a, char b, bool once)
 	}
 	pos[0]++;
 	std::string result = pos[0] >= 0 && pos[1] >= 0 ? line.substr(pos[0], pos[1]-pos[0]) : "";
-	for (i = result.find("\\\""); i != std::string::npos; i = result.find("\\\""))
-		result.replace(i, 2, "\"");
+	Replace(result, "\\\"", "\"");
 	return result;
 }
 

src/lyrics.cpp

@@ -209,8 +209,8 @@ void *Lyrics::Get(void *screen_void_ptr)
 	char *c_title = curl_easy_escape(0, title.c_str(), title.length());
 	
 	std::string url = my_lyrics->url;
-	url.replace(url.find("%artist%"), static_strlen("%artist%"), c_artist);
-	url.replace(url.find("%title%"), static_strlen("%title%"), c_title);
+	Replace(url, "%artist%", c_artist);
+	Replace(url, "%title%", c_title);
 	
 	CURLcode code;
 	pthread_mutex_lock(&CurlLock);
@@ -255,10 +255,8 @@ void *Lyrics::Get(void *screen_void_ptr)
 		pthread_exit(0);
 	}
 	
-	for (size_t i = result.find("<"); i != std::string::npos; i = result.find("<"))
-		result.replace(i, static_strlen("&lt;"), "<");
-	for (size_t i = result.find("&gt;"); i != std::string::npos; i = result.find("&gt;"))
-		result.replace(i, static_strlen("&gt;"), ">");
+	Replace(result, "&lt;", "<");
+	Replace(result, "&gt;", ">");
 	
 	EscapeHtml(result);
 	Trim(result);

src/song.cpp

@@ -415,7 +415,7 @@ std::string MPD::Song::ParseFormat(std::string::const_iterator &it, const char *
 				std::string tag = GetTags(get);
 				if (escape_chars) // prepend format escape character to all given chars to escape
 					for (const char *ch = escape_chars; *ch; ++ch)
-						for (size_t i = tag.find(*ch); i != std::string::npos; i = tag.find(*ch, i += 2))
+						for (size_t i = 0; (i = tag.find(*ch), i) != std::string::npos; i += 2)
 							tag.replace(i, 1, std::string(1, FormatEscapeCharacter) + ch);
 				if (!tag.empty() && (get != &MPD::Song::GetLength || GetTotalLength()))
 				{