Changes to MString to add insert and remove methods.

MString.cpp

@@ -2,6 +2,7 @@
 #include "Log.h"
 #include <stdlib.h>
 #include <iomanip>
+#include <cstring>
 
 namespace coreutils {
 
@@ -139,6 +140,44 @@ namespace coreutils {
       return *this;
    }
 
+   void MString::insert(char ch, int offset) {
+      setSize(length + 1); 
+      for(int ix = length; ix >= offset; ix--) 
+	getData()[ix + 1] = getData()[ix]; 
+      data[offset] = ch;
+   }
+   
+   void MString::insert(ZString &value, int offset) {
+      setSize(length + value.getLength());
+      for(int ix = length; ix >= offset; ix--) 
+	getData()[ix + value.getLength()] = getData()[ix]; 
+      std::memcpy(data + offset, value.getData(), value.getLength());
+   }
+   
+   void MString::insert(std::string value, int offset) {
+      setSize(length + value.size());
+      for(int ix = length; ix >= offset; ix--) 
+	getData()[ix + value.size()] = getData()[ix]; 
+      std::memcpy(data + offset, value.c_str(), value.size());
+   }
+   
+   void MString::replace(char ch, int offset) {
+      
+   }
+   
+   void MString::replace(ZString &value, int offset) {
+   }
+   
+   void MString::replace(std::string value, int offset) {
+   }
+   
+   void MString::remove(int offset, int length) {
+//      (data + this->length) > (data + offset + length) ? length: length; // TODO: Need to calculate correct length.
+      for(int ix = offset; ix < this->length; ix++) 
+	getData()[ix] = getData()[ix + length]; 
+      setSize(this->length - length);
+   }
+   
    MString& MString::write(char ch) {
       setSize(length + 1);
       *(data + length - 1) = ch;