diff --git a/File.cpp b/File.cpp
index aed1731..33211ad 100644
--- a/File.cpp
+++ b/File.cpp
@@ -63,4 +63,9 @@ namespace coreutils {
       return std::string(buffer, size);
    }
 
+   coreutils::ZString & File::asZString() {
+      zstring = ZString(buffer, size);
+      return zstring;
+   }
+
 }
diff --git a/File.h b/File.h
index 7f2c13f..d2bb3e9 100644
--- a/File.h
+++ b/File.h
@@ -24,7 +24,7 @@ namespace coreutils {
       void write(std::string data);
       void write(coreutils::ZString &data);
       std::string asString();
-
+      coreutils::ZString& asZString();
       char *buffer;
       size_t size;
 
@@ -33,6 +33,7 @@ namespace coreutils {
     private:
       void open(std::string fileName, int mode, int authority);
       int fd;
+      coreutils::ZString zstring;
 
    };
 
diff --git a/MString.cpp b/MString.cpp
index a7cf8e0..8c3d43f 100644
--- a/MString.cpp
+++ b/MString.cpp
@@ -105,30 +105,30 @@ namespace coreutils {
       int len = strlen(value);
       setSize(len + length);
       memcpy(data + temp, value, len);
-      return *this;            
+      return *this;
    }
 
    MString& MString::operator<<(const int value) {
       std::stringstream temp;
       temp << value;
       *this << temp.str();
-      return *this;            
+      return *this;
    }
 
-   // MString& MString::operator<<(coreutils::ZString &zstring) {
-   //    int temp = length;
-   //    int len = length + zstring.getLength();
-   //    setSize(len);
-   //    memcpy(data + temp, zstring.getData(), zstring.getLength());
-   //    return *this;            
-   // }
+//   MString& MString::operator<<(coreutils::ZString &zstring) {
+//      int temp = length;
+//      int len = length + zstring.getLength();
+//      setSize(len);
+//      memcpy(data + temp, zstring.getData(), zstring.getLength());
+//      return *this;
+//   }
 
    MString& MString::operator<<(coreutils::ZString zstring) {
       int temp = length;
       int len = length + zstring.getLength();
       setSize(len);
       memcpy(data + temp, zstring.getData(), zstring.getLength());
-      return *this;            
+      return *this;
    }
 
    MString& MString::operator<<(std::string value) {
@@ -136,7 +136,7 @@ namespace coreutils {
       int len = length + value.length();
       setSize(len);
       memcpy(data + temp, value.c_str(), value.length());
-      return *this;            
+      return *this;
    }
 
    MString& MString::write(char ch) {
diff --git a/ZString.cpp b/ZString.cpp
index 81c5c9f..e583997 100644
--- a/ZString.cpp
+++ b/ZString.cpp
@@ -45,14 +45,20 @@ namespace coreutils {
       //      Log(LOG_DEBUG_2) << "ZString Copy Constructor: ";
    }
 
-   ZString::ZString(std::string data) {
+   ZString::ZString(std::string &data) {
       this->data = (char *)data.c_str();
       length = data.length();
       cursor = (char *)data.c_str();
    }
 
+//   ZString::ZString(std::string data) {
+//      this->data = (char *)data.c_str();
+//      length = data.length();
+//      cursor = (char *)data.c_str();
+//   }
+
    ZString::~ZString() {
-      if(cdata)
+      if(cdata != NULL)
         free(cdata);
    }
 
@@ -64,10 +70,16 @@ namespace coreutils {
       return (strncmp(data, valuex.data, valuex.length <= length ? valuex.length : length) > 0);
    }
 
-   bool ZString::operator==(const ZString &valuex) const {
+   bool ZString::operator==(const ZString &valuex) {
       return (strncmp(data, valuex.data, valuex.length <= length ? valuex.length : length) == 0);
    }
 
+   bool ZString::operator==(std::string value) {
+      if(value.length() != length)
+	return false;
+      return (strncmp(data, value.c_str(), length) == 0);
+   }
+
    bool ZString::operator==(const char *valuex) const {
       return (strncmp(data, valuex, length) == 0);
    }
@@ -105,14 +117,14 @@ namespace coreutils {
    }
 
    void ZString::push() {
-      stack.push(cursor);      
+      stack.push(cursor);
    }
 
    void ZString::pop() {
       cursor = stack.top();
-      stack.pop();      
+      stack.pop();
    }
-      
+
    std::string ZString::str() {
       return std::string(data, length);
    }
@@ -126,7 +138,7 @@ namespace coreutils {
       strncpy(cdata, data, length);
       cdata[length] = '\0';
       return cdata;
-   }   
+   }
 
    ZString ZString::substring(int start) {
       char *end = data + length;
@@ -167,7 +179,7 @@ namespace coreutils {
          }
       }
       list.push_back(ZString(cursor, pos - cursor));
-      cursor = pos;
+      cursor = data;
       return list;
    }
    
diff --git a/ZString.h b/ZString.h
index b7790e7..af0b45f 100644
--- a/ZString.h
+++ b/ZString.h
@@ -56,7 +56,7 @@ namespace coreutils {
       ///
       ///
       ///
-      
+
       ZString(const char *data, size_t length);
 
       ///
@@ -69,7 +69,13 @@ namespace coreutils {
       /// Consructor from a string.
       ///
 
-      ZString(std::string string);
+      ZString(std::string &string);
+
+      ///
+      /// Consructor from a string.
+      ///
+
+//      ZString(std::string string);
 
       ///
       /// Destructor for the ZString.
@@ -90,15 +96,16 @@ namespace coreutils {
       ///
       ///
       ///
-      
+
       bool operator<(const ZString &valuex) const;
 
       ///
       ///
       ///
-      
+
       bool operator>(const ZString &valuex) const;
-      bool operator==(const ZString &valuex) const;
+      bool operator==(const ZString &valuex);
+      bool operator==(std::string value);
       bool operator==(const char *valuex) const;
       bool operator!=(const ZString &valuex) const;
       bool operator!=(const char *valuex) const;
@@ -165,9 +172,9 @@ namespace coreutils {
       ///
       ///
       ///
-      
+
       ZString substring(int start, int len);
-      
+
       ///
       ///
       ///
@@ -197,7 +204,7 @@ namespace coreutils {
       ///
       ///
       ///
-      
+
       ZString getTokenExclude(std::string exclude);
 
       ///
@@ -252,13 +259,13 @@ namespace coreutils {
       ///
       ///
       ///
-      
+
       bool ifNext(ZString &value);
 
       ///
       ///
       ///
-      
+
       int ifEqualsCount(ZString &comparator);
 
       ///
@@ -296,7 +303,7 @@ namespace coreutils {
       ///
       ///
       ///
-      
+
       void setCursor(char *cursor);
 
       ///
@@ -323,7 +330,7 @@ namespace coreutils {
       ///
       ///
       ///
-      
+
       ZString unparsed();
 
       ///
diff --git a/testing/mstring_test b/testing/mstring_test
index 01f0d21..422aee4 100755
Binary files a/testing/mstring_test and b/testing/mstring_test differ
diff --git a/testing/mstring_test.cpp b/testing/mstring_test.cpp
index 9fb9fc5..e499d0a 100644
--- a/testing/mstring_test.cpp
+++ b/testing/mstring_test.cpp
@@ -17,8 +17,9 @@ int main(int argc, char **argv) {
    test3 = 'a';
    std::cout << "char operator=: [" << test3 << "]." << std::endl;   
 
+   coreutils::ZString test7("zstring data");
    coreutils::MString test4;
-   test4 << "this is a test.";
+   test4 << "this is a test." << test7;
    std::cout << "char* operator<<: [" << test4 << "]." << std::endl;   
    test4 << "another test " << 75;
    std::cout << "char* operator<<: [" << test4 << "]." << std::endl;   
diff --git a/testing/zstring_test b/testing/zstring_test
index 5d13824..c2d7ff6 100755
Binary files a/testing/zstring_test and b/testing/zstring_test differ
diff --git a/testing/zstring_test.cpp b/testing/zstring_test.cpp
index e18dd76..45d8275 100644
--- a/testing/zstring_test.cpp
+++ b/testing/zstring_test.cpp
@@ -6,7 +6,12 @@ int main(int argc, char **argv) {
    // Test comparison operations.
 
    coreutils::ZString test1("");
-   std::cout << (test1 != ".");
+   std::cout << (test1 != ".") << std::endl;
+
+   // Test constructors.
+
+   coreutils::ZString test3("1659979856.747021214|barant@barant");
+   std::cout << test3 << std::endl;  
    
    // Test split operations.