Implemented freevars

Arbitrary variable tokens can now be defined (though at this point only in the code itself) as a pair of a variable name and a filename pointing to a plain text file containing a newline-delimited list of elements. When a token of the form $name$ (where name is the name of a variable) is encountered, the output will include a random element from the appropriate list. The variables $name$ and $noun$ are hard-coded at this point, but the program will not crash if names.txt and nouns.txt do not exist and will instead just silently ignore the variables.

1 files changed, 45 insertions, 0 deletions

@@ -0,0 +1,45 @@
+#include "freevars.h"
+#include <fstream>
+
+freevars::freevars()
+{
+    vars = new map<string, vector<string>* >();
+}
+
+void freevars::addVar(string name, string filename)
+{
+    vector<string>* eltlist = new vector<string>();
+    
+    ifstream infile(filename.c_str());
+    if (infile)
+    {
+        string line;
+        
+        while (getline(infile, line))
+        {
+            eltlist->push_back(line);
+        }
+    } else {
+        eltlist->push_back("");
+    }
+    
+    (*vars)[name] = eltlist;
+}
+
+string freevars::parse(string in)
+{
+    string res(in);
+    
+    for (map<string, vector<string>* >::iterator it = vars->begin(); it != vars->end(); it++)
+    {
+        string tofind = "$" + it->first + "$";
+        size_t fpos = res.find(tofind);
+        if (fpos != string::npos)
+        {
+            int r = rand() % it->second->size();
+            res.replace(fpos, tofind.length(), (*it->second)[r], 0, string::npos);
+        }
+    }
+    
+    return res;
+}
\ No newline at end of file