[all] Build a single executable

base/application.cc

@@ -0,0 +1,62 @@
+#include "base/application.h"
+
+#include <linux/limits.h>
+#include <string.h>
+
+using namespace base;
+using namespace std;
+
+//----------------------------------------------------------------
+
+int
+application::run(int argc, char **argv)
+{
+	string cmd = basename(argv[0]);
+
+	if (cmd == string("pdata-tools")) {
+		argc--;
+		argv++;
+
+		if (!argc) {
+			usage();
+			return 1;
+		}
+
+		cmd = argv[0];
+	}
+
+	std::list<command const *>::const_iterator it;
+	for (it = cmds_.begin(); it != cmds_.end(); ++it) {
+		if (cmd == (*it)->get_name())
+			return (*it)->run(argc, argv);
+	}
+
+	std::cerr << "Unknown command '" << cmd << "'\n";
+	usage();
+	return 1;
+}
+
+void
+application::usage()
+{
+	std::cerr << "Usage: <command> <args>\n"
+		  << "commands:\n";
+
+	std::list<command const *>::const_iterator it;
+	for (it = cmds_.begin(); it != cmds_.end(); ++it) {
+		std::cerr << "  " << (*it)->get_name() << "\n";
+	}
+}
+
+std::string
+application::basename(std::string const &path) const
+{
+	char buffer[PATH_MAX + 1];
+
+	memset(buffer, 0, sizeof(buffer));
+	strncpy(buffer, path.c_str(), PATH_MAX);
+
+	return ::basename(buffer);
+}
+
+//----------------------------------------------------------------

base/application.h

@@ -0,0 +1,52 @@
+#ifndef BASE_APPLICATION_H
+#define BASE_APPLICATION_H
+
+#include <iostream>
+#include <list>
+#include <string>
+#include <stdexcept>
+
+//----------------------------------------------------------------
+
+namespace base {
+	class command {
+	public:
+		typedef int (*cmd_fn)(int, char **);
+
+		command(std::string const &name, cmd_fn fn)
+			: name_(name),
+			  fn_(fn) {
+		}
+
+		std::string const &get_name() const {
+			return name_;
+		}
+
+		int run(int argc, char **argv) const {
+			return fn_(argc, argv);
+		}
+
+	private:
+		std::string name_;
+		cmd_fn fn_;
+	};
+
+	class application {
+	public:
+		void add_cmd(command const &c) {
+			cmds_.push_back(&c);
+		}
+
+		int run(int argc, char **argv);
+
+	private:
+		void usage();
+		std::string basename(std::string const &path) const;
+
+		std::list<command const *> cmds_;
+	};
+}
+
+//----------------------------------------------------------------
+
+#endif