--- ddd/strclass.h

+++ ddd/strclass.h

@@ -810,10 +810,10 @@ public:

     friend int split(const string& x, string *res, int maxn, 

 		     const regex& sep);

-    friend string common_prefix(const string& x, const string& y, 

-				int startpos = 0);

-    friend string common_suffix(const string& x, const string& y, 

-				int startpos = -1);

+    inline string common_prefix(const string& x, const string& y);

+    friend string common_prefix(const string& x, const string& y, int startpos);

+    inline string common_suffix(const string& x, const string& y);

+    friend string common_suffix(const string& x, const string& y, int startpos);

     friend string replicate(char c, int n);

     friend string replicate(const string& y, int n);

     friend string join(const string *src, int n, const string& sep);

@@ -863,9 +863,10 @@ public:

     friend inline std::ostream& operator<<(std::ostream& s, const subString& x);

     friend std::istream& operator>>(std::istream& s, string& x);

-    friend int readline(std::istream& s, string& x, 

-			char terminator = '\n',

-			int discard_terminator = 1);

+    inline int readline(std::istream& s, string& x);

+    inline int readline(std::istream& s, string& x, char terminator);

+    friend int readline(std::istream& s, string& x, char terminator,

+			int discard_terminator);

     // Status

     unsigned int length() const;

@@ -1456,6 +1457,16 @@ inline string operator + (char x, const subString& y)

     string r; cat(x, y, r); return r;

 }

+inline string common_prefix(const string& x, const string& y)

+{

+    return common_prefix(x, y, 0);

+}

+

+inline string common_suffix(const string& x, const string& y)

+{

+    return common_suffix(x, y, -1);

+}

+

 inline string reverse(const string& x) 

 {

     string r; r.rep = string_Sreverse(x.rep, r.rep); return r;

@@ -1476,6 +1487,16 @@ inline string capitalize(const string& x)

     string r; r.rep = string_Scapitalize(x.rep, r.rep); return r;

 }

+inline int readline(std::istream& s, string& x)

+{

+    return readline(s, x, '\n', 1);

+}

+

+inline int readline(std::istream& s, string& x, char terminator)

+{

+    return readline(s, x, terminator, 1);

+}

+

 // prepend

 inline string& string::prepend(const string& y)