1 files changed, 107 insertions, 0 deletions
diff --git a/src/cli/getopt.h b/src/cli/getopt.h
new file mode 100644
index 000000000..f683159d0
--- /dev/null
+++ b/src/cli/getopt.h
@@ -0,0 +1,107 @@
+/*
+* (C) 2009 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_CHECK_GETOPT_H__
+#define BOTAN_CHECK_GETOPT_H__
+
+#include <string>
+#include <vector>
+#include <stdexcept>
+#include <map>
+
+#include <botan/parsing.h>
+
+class OptionParser
+   {
+   public:
+      std::vector<std::string> arguments() const { return leftover; }
+
+      bool is_set(const std::string& key) const
+         {
+         return (options.find(key) != options.end());
+         }
+
+      std::string value(const std::string& key) const
+         {
+         std::map<std::string, std::string>::const_iterator i = options.find(key);
+         if(i == options.end())
+            throw std::runtime_error("Option '" + key + "' not set");
+         return i->second;
+         }
+
+      std::string value_if_set(const std::string& key) const
+         {
+         return value_or_else(key, "");
+         }
+
+      std::string value_or_else(const std::string& key,
+                                const std::string& or_else) const
+         {
+         return is_set(key) ? value(key) : or_else;
+         }
+
+      size_t int_value_or_else(const std::string& key, size_t or_else) const
+         {
+         return is_set(key) ? Botan::to_u32bit(value(key)) : or_else;
+         }
+
+      void help(std::ostream& o, const std::string &appname)
+         {
+         o << "Usage: " << appname << " ";
+
+         for(auto flag : flags)
+            {
+            o << "--" << flag.name();
+            if(flag.takes_arg())
+               o << "=";
+            o << " ";
+            }
+
+         o << std::endl;
+         }
+
+      void parse(const std::vector<std::string> &args);
+
+      OptionParser(const std::string& opt_string)
+         {
+         std::vector<std::string> opts = Botan::split_on(opt_string, '|');
+
+         for(size_t j = 0; j != opts.size(); j++)
+            flags.push_back(OptionFlag(opts[j]));
+         }
+
+   private:
+      class OptionFlag
+         {
+         public:
+            std::string name() const { return opt_name; }
+            bool takes_arg() const { return opt_takes_arg; }
+
+            OptionFlag(const std::string& opt_string)
+               {
+               std::string::size_type mark = opt_string.find('=');
+               opt_name = opt_string.substr(0, mark);
+               opt_takes_arg = (mark != std::string::npos);
+               }
+         private:
+            std::string opt_name;
+            bool opt_takes_arg;
+         };
+
+      OptionFlag find_option(const std::string& name) const
+         {
+         for(size_t j = 0; j != flags.size(); j++)
+            if(flags[j].name() == name)
+               return flags[j];
+         throw std::runtime_error("Unknown option " + name);
+         }
+
+      std::vector<OptionFlag> flags;
+      std::map<std::string, std::string> options;
+      std::vector<std::string> leftover;
+   };
+
+#endif