changed "outfile" parameter to be a base name, added "classname" parameter

Parser.cc

@@ -15,6 +15,7 @@
 using namespace std;
 
 Parser::Parser()
+    : m_classname("Parser")
 {
 }
 

Parser.h

@@ -23,10 +23,13 @@ class Parser
         }
         void write(const std::string & fname);
         bool parseInputFile(char * buff, int size);
+        void setClassName(const std::string & cn) { m_classname = cn; }
+        std::string getClassName() { return m_classname; }
 
     protected:
         std::vector< refptr< TokenDefinition > > m_tokens;
         std::vector< refptr< RuleDefinition > > m_rules;
+        std::string m_classname;
 };
 
 #endif

imbecile.cc

@@ -15,10 +15,12 @@ int main(int argc, char * argv[])
 {
     int longind = 1;
     int opt;
-    string output_fname;
+    string outfile;
+    string classname = "Parser";
 
     static struct option longopts[] = {
         /* name, has_arg, flag, val */
+        { "classname", required_argument, NULL, 'c' },
         { "outfile", required_argument, NULL, 'o' },
         { NULL, 0, NULL, 0 }
     };
@@ -27,12 +29,21 @@ int main(int argc, char * argv[])
     {
         switch (opt)
         {
+            case 'c':   /* classname */
+                classname = optarg;
+                break;
             case 'o':   /* outfile */
-                output_fname = optarg;
+                outfile = optarg;
                 break;
         }
     }
 
+    if (optind >= argc)
+    {
+        cerr << "Usage: imbecile [options] <input-file>" << endl;
+        return 2;
+    }
+
     string input_fname = argv[optind];
     ifstream ifs;
     ifs.open(input_fname.c_str(), ios::binary);
@@ -48,14 +59,13 @@ int main(int argc, char * argv[])
     ifs.read(buff, size);
     ifs.close();
 
-    if (output_fname == "")
-        output_fname = buildOutputFilename(input_fname);
+    if (outfile == "")
+        outfile = buildOutputFilename(input_fname);
 
     Parser p;
-
+    p.setClassName(classname);
     p.parseInputFile(buff, size);
-
-    p.write(output_fname);
+    p.write(outfile);
 
     delete[] buff;
     return 0;
@@ -63,15 +73,15 @@ int main(int argc, char * argv[])
 
 string buildOutputFilename(string & input_fname)
 {
-    string output_fname;
+    string outfile;
     size_t len = input_fname.length();
     if (len > 2 && input_fname.substr(len - 2) == ".I")
     {
-        output_fname = input_fname.substr(0, len - 2) + ".cc";
+        outfile = input_fname.substr(0, len - 2);
     }
     else
     {
-        output_fname = input_fname + ".cc";
+        outfile = input_fname;
     }
-    return output_fname;
+    return outfile;
 }