added: a new mount type: static

some path in winix can be redirected to a specified static directory


git-svn-id: svn://ttmath.org/publicrep/winix/trunk@738 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/misc.h

@@ -389,6 +389,160 @@ void NoFirstHttp(StringType & s)
 
 
 
+/*
+	this method returns true if there are two dots meaning 'go up' somewhere in the path
+
+	for example such paths return true:
+	".."
+	"test/../path"
+	"test/where/../"
+	"test/where/.."
+	"../abc"
+*/
+template<class StringType>
+bool PathHasUpDir(const StringType * str)
+{
+size_t i = 0;
+
+	while( str[i] )
+	{
+		if( str[i]=='.' && str[i+1]=='.' )
+		{
+			i += 2;
+
+			if( str[i]=='/' || str[i]==0 )
+				return true;
+		}
+
+		// skipping until to next slash
+		while( str[i] && str[i]!='/' )
+			i += 1;
+
+		// skipping the slash (or slashes)
+		while( str[i]=='/' )
+			i += 1;
+	}
+
+return false;
+}
+
+
+template<class StringType>
+bool PathHasUpDir(const StringType & str)
+{
+	return PathHasUpDir(str.c_str());
+}
+
+
+
+/*
+	this method calculates how many directories there are in the given path
+	input:
+		str         - path
+		last_is_dir - true if the last part of the path should be treated as a directory too
+
+	samples:
+	HowManyDirs("", false)            -> 0
+	HowManyDirs("", true)             -> 0
+	HowManyDirs("abc", false)         -> 0
+	HowManyDirs("abc", true)          -> 1
+	HowManyDirs("/abc/", true)        -> 1
+	HowManyDirs("////", false)        -> 0
+	HowManyDirs("////", true)         -> 0
+	HowManyDirs("////abc", false)     -> 0
+	HowManyDirs("////abc", true)      -> 1
+	HowManyDirs("/var/static", false) -> 1
+	HowManyDirs("/var/static", true)  -> 2
+	HowManyDirs("/var/static/", false) -> 2
+	HowManyDirs("/var/static/", true)  -> 2
+*/
+template<class StringType>
+size_t HowManyDirs(const StringType * str, bool is_last_dir = false)
+{
+size_t res = 0;
+size_t i = 0;
+
+	// first slash (root dir) is not calculated
+	while( str[i]=='/' )
+		i += 1;
+
+	while( str[i] )
+	{
+		if( str[i]=='/' )
+		{
+			res += 1;
+
+			while( str[i]=='/' )
+				i += 1;
+		}
+		else
+		{
+			i += 1;
+		}
+	}
+
+	if( is_last_dir && i>0 && str[i-1]!='/' )
+		res += 1;
+
+return res;
+}
+
+
+template<class StringType>
+size_t HowManyDirs(const StringType & str, bool is_last_dir = false)
+{
+	return HowManyDirs(str.c_str(), is_last_dir);
+}
+
+
+
+
+/*
+	this method skips some first directories from given path
+
+	samples:
+	SkipDirs("/var/test", 1)            -> "test"
+	SkipDirs("/var/test/somewhere", 1)  -> "test/somewhere"
+	SkipDirs("/var/test/somewhere", 2)  -> "somewhere"
+	SkipDirs("/var/test/somewhere", 10) -> ""
+*/
+template<class StringType>
+const StringType * SkipDirs(const StringType * str, size_t how_many_skip)
+{
+size_t i = 0;
+size_t skipped = 0;
+
+	if( how_many_skip == 0 )
+		return str;
+
+	// first slash (root dir) is not calculated
+	while( str[i]=='/' )
+		i += 1;
+
+	while( str[i] )
+	{
+		if( str[i]=='/' )
+		{
+			skipped += 1;
+
+			while( str[i]=='/' )
+				i += 1;
+
+			if( skipped == how_many_skip )
+				return str+i;
+		}
+		else
+		{
+			i += 1;
+		}
+	}
+
+return str + i;
+}
+
+
+
+
 
 
 bool ValidateEmail(const std::wstring & email);