added replaceString

src/FbTk/StringUtil.cc

@@ -23,7 +23,7 @@
 
 #include "StringUtil.hh"
 
-#include <string>
+
 #ifdef HAVE_CSTDIO
   #include <cstdio>
 #else
@@ -44,8 +44,11 @@
 #else
   #include <assert.h>
 #endif
+
+
 #include <memory>
 #include <algorithm>
+#include <string>
 
 using namespace std;
 
@@ -116,6 +119,27 @@ string findExtension(const std::string &filename) {
     return filename.substr(start_pos + 1);
 }
 
+string replaceString(const std::string &original,
+                     const char *findthis,
+                     const char *replace) {
+    int i=0;
+    const int size_of_replace = strlen(replace);
+    const int size_of_find = strlen(findthis);
+    string ret_str(original);
+    while (i < ret_str.size()) {
+        i = ret_str.find(findthis, i);
+        if (i == std::string::npos)
+            break;
+        // erase old string and insert replacement
+        ret_str.erase(i, size_of_find);
+        ret_str.insert(i, replace);
+        // jump to next position after insert
+        i += size_of_replace;
+    }
+
+    return ret_str;
+}
+
 /**
    Parses a string between "first" and "last" characters
    and ignoring ok_chars as whitespaces. The value is

src/FbTk/StringUtil.hh

@@ -41,6 +41,11 @@ std::string expandFilename(const std::string &filename);
 /// @return extension of filename (ex: filename.txt will return txt)
 std::string findExtension(const std::string &filename);
 
+/// @return copy of original with find_string replaced with "replace"
+std::string replaceString(const std::string &original, 
+                          const char *find_string,
+                          const char *replace);
+                          
 ///  returns string between character first and last
 int getStringBetween(std::string& out, const char *instr,
                      char first, char last,