Adds command line arguments processor

CMakeLists.txt

@@ -19,6 +19,7 @@ set(LUNARIUM_SRC
 "src/utils/HighResTimer.cpp"
 "src/utils/helpers.cpp"
 "src/utils/OpRes.cpp"
+"src/utils/Args.cpp"
 )
 
 # add the executable

src/core/core.cpp

@@ -7,27 +7,28 @@
 ******************************************************************************/
 
 #include "core.h"
+#include "Version.h"
 
 namespace lunarium
 {
-    core* core::mpInstance = nullptr;
-    core::core()
+    Core* Core::mpInstance = nullptr;
+    Core::Core()
         : mbIsInit(false) 
     {
     
     }
 
-    core& core::GetInstance()
+    Core& Core::GetInstance()
     {
         if (!mpInstance)
         {
-            mpInstance = new core;
+            mpInstance = new Core;
         }
 
         return *mpInstance;
     }
 
-    void core::Shutdown()
+    void Core::Shutdown()
     {
         if (!mpInstance)
             return;
@@ -38,7 +39,7 @@ namespace lunarium
         mpInstance = nullptr;
     }
 
-    void core::Initialize(const char* args, std::vector<LogListener*>& listeners)
+    void Core::Initialize(int argc, char** argv, std::vector<LogListener*>& listeners)
     {
         mpLog = Logger::GetInstance();
         
@@ -46,14 +47,16 @@ namespace lunarium
         {
             mpLog->AddListener(listeners[i]);
         }
+
+        mpLog->Log(LogCategory::CORE, LogLevel::INFO, "Running Lunarium version %s", Version::GetVersion().ToString().c_str());
     }
 
-    bool core::IsInit() const
+    bool Core::IsInit() const
     {
         return mbIsInit;
     }
 
-    const State& core::GetState() const
+    const State& Core::GetState() const
     {
         return mState;
     }

src/core/core.h

@@ -11,31 +11,32 @@
 
 #include "state.h"
 #include <utils/Logger.h>
+#include <utils/args.h>
 
 namespace lunarium
 {
-    class core
+    class Core
     {
     public:
-        static core& GetInstance();
+        static Core& GetInstance();
         static void Shutdown();
 
-        void Initialize(const char* args, std::vector<LogListener*>& listeners);
+        void Initialize(int argc, char** argv, std::vector<LogListener*>& listeners);
 
         bool IsInit() const;
         const State& GetState() const;
 
     private:    // DATA
-        static core* mpInstance;
+        static Core* mpInstance;
         bool mbIsInit;
         State mState;
         Logger* mpLog;
 
     private: // HIDDEN METHODS
 
-        core();
-        core(const core&) = delete;
-        core& operator=(const core&) = delete;
+        Core();
+        Core(const Core&) = delete;
+        Core& operator=(const Core&) = delete;
     };
 }
 

src/test_main.cpp

@@ -10,6 +10,7 @@
 #include "utils/OpRes.h"
 #include "core/state.h"
 #include "core/Version.h"
+#include "utils/args.h"
 
 extern "C"
 {
@@ -33,15 +34,39 @@ int main(int argc, char** argv)
 
     // VERSION TEST
     std::cout << "Hello yall\n";
-    // std::cout << "This is " << argv[0] << " Version " << Lunarium_VERSION_MAJOR 
-    //                                             << "." << Lunarium_VERSION_MINOR
-    //                                             << "." << Lunarium_VERSION_PATCH << '\n';
     std::cout << "This is " << argv[0] << " Version " << lunarium::Version::GetVersion().ToString() << "\n";
 
     glm::vec3 testVec = glm::vec3(1.0f, 2.0f, 3.0f);
 
     std::cout << "\ntestVec: (" << testVec.x << ", " << testVec.y << ", " << testVec.z << ")\n";
 
+    // Args testing
+    std::vector<lunarium::Args::SwitchDesc> sd;
+    sd.push_back({ "t", true});
+    sd.push_back({ "d", true});
+    sd.push_back({ "h", false});
+    lunarium::Args args(argc, argv, '-', sd);
+
+    if (args.ContainsSwitch("t"))
+    {
+        std::cout << "t switch is: " << args.GetSwitchValue("t") << "\n";
+    }
+
+    if (args.ContainsSwitch("d"))
+    {
+        std::cout << "d switch is: " << args.GetSwitchValue("d") << "\n";
+    }
+
+    if (args.ContainsSwitch("h"))
+    {
+        std::cout << "h switch is found!\n";
+    }
+
+    if (args.GetNumPositionalArgs() > 1)
+    {
+        std::cout << "First position argument: " << args.GetArgAtPosition(1) << std::endl;
+    }
+
     // LUA TEST
     std::cout << "\nTesting LUA: a = 7 + 4\n";
     lua_State* L = luaL_newstate();

src/utils/args.cpp

@@ -0,0 +1,123 @@
+/******************************************************************************
+*	File		-	args.cpp
+*	Author		-	Joey Pollack
+*	Date		-	2021/09/01 (y/m/d)
+*	Mod Date	-	2021/09/01 (y/m/d)
+*	Description	-	Processes command line arguments.
+******************************************************************************/
+
+#include "Args.h"
+#include <sstream>
+
+namespace lunarium
+{
+    
+    Args::Args(int argc, char** argv, char switch_char, std::vector<SwitchDesc>& switches)
+        : mNumArgs(argc), mSwitchChar(switch_char)
+    {
+        for (int i = 0; i < switches.size(); i++)
+        {
+            mSwitchHasValue.insert( { switches[i].symbol, switches[i].expect_value } );
+        }
+
+        for (int i = 0; i < mNumArgs; i++)
+        {
+            mArgs.push_back(std::string(argv[i]));
+        }
+
+        Process();
+    }
+
+    const std::vector<std::string>& Args::GetPositionalArgs() const
+    {
+        return mPositionalArgs;
+    }
+
+    const std::map<std::string, std::string>& Args::GetSwitchArgs() const
+    {
+        return mSwitchArgs;
+    }
+
+    int Args::GetNumPositionalArgs() const
+    {
+        return mPositionalArgs.size();
+    }
+
+    // Does no error checking.
+    const std::string& Args::GetArgAtPosition(int pos) const
+    {
+        return mPositionalArgs[pos];
+    }
+
+    bool Args::ContainsSwitch(std::string s) const
+    {
+        return mSwitchArgs.find(s) != mSwitchArgs.end();
+    }
+
+    // Does no error checking.
+    const std::string& Args::GetSwitchValue(std::string s) const
+    {
+        return mSwitchArgs.find(s)->second;
+    }
+
+    const std::vector<std::string>& Args::GetRawArgs() const
+    {
+        return mArgs;
+    }
+
+    void Args::Process()
+    {
+        for (int i = 0; i < mNumArgs; i++)
+        {
+            bool isSwitch = (mArgs[i][0] == mSwitchChar);
+            
+            if (isSwitch)
+            {
+                int curPos = 1;
+                std::ostringstream iss;
+
+                // This is a switch need to store everything after the switch char
+                while (curPos < mArgs[i].size())
+                {
+                    iss << mArgs[i][curPos];
+                    curPos++;
+                }
+
+                // Store the switch
+                std::string skey = iss.str();
+                std::string svalue = "";
+
+                // check that this is a valid switch
+                auto siter = mSwitchHasValue.find(skey);
+                if (siter != mSwitchHasValue.end())
+                {
+                    // Need to also consume the next arg in the vector
+                    // if this switch has a value
+                    if (siter->second)
+                    {
+                        i++;
+                        curPos = 0;
+                        iss.str("");
+                        iss.clear();
+
+                        while (curPos < mArgs[i].size())
+                        {
+                            iss << mArgs[i][curPos];
+                            curPos++;
+                        }
+
+                        svalue = iss.str();
+                    }
+                    
+                    mSwitchArgs.insert( { skey, svalue } );
+
+                }
+
+            }
+            else
+            {
+                mPositionalArgs.push_back(mArgs[i]);
+            }
+        }
+    }
+}

src/utils/args.h

@@ -0,0 +1,59 @@
+/******************************************************************************
+*	File		-	args.h
+*	Author		-	Joey Pollack
+*	Date		-	2021/09/01 (y/m/d)
+*	Mod Date	-	2021/09/01 (y/m/d)
+*	Description	-	Processes command line arguments.
+******************************************************************************/
+
+#ifndef ARGS_H_
+#define ARGS_H_
+
+#include <string>
+#include <vector>
+#include <map>
+
+namespace lunarium
+{
+    class Args
+    {
+    public:
+
+        struct SwitchDesc
+        {
+            std::string symbol;
+            bool expect_value;
+        };
+
+    public:
+        Args(int argc, char** argv, char switch_char, std::vector<SwitchDesc>& switches);
+
+        const std::vector<std::string>& GetPositionalArgs() const;
+        const std::map<std::string, std::string>& GetSwitchArgs() const;
+
+        int GetNumPositionalArgs() const;
+        const std::string& GetArgAtPosition(int pos) const;
+
+        bool ContainsSwitch(std::string) const;
+        const std::string& GetSwitchValue(std::string) const;
+
+        const std::vector<std::string>& GetRawArgs() const;
+
+    private:
+        std::vector<std::string> mPositionalArgs;
+        std::map<std::string, std::string> mSwitchArgs;
+
+        std::map<std::string, bool> mSwitchHasValue;
+
+        // Raw args
+        char mSwitchChar;
+        int mNumArgs;
+        std::vector<std::string> mArgs;
+
+    private: // Helpers
+        void Process();
+
+    };
+}
+
+#endif  // ARGS_H_