Mac OS X 10.6 & More C++03 Support (#68)

* Mac OS X 10.6 & More C++03 Support

* Fix SDL2 options.txt loading for C++03

---------

Co-authored-by: Brent Da Mage <BrentDaMage@users.noreply.github.com>

source/common/CThread.cpp

@@ -6,7 +6,7 @@
 	SPDX-License-Identifier: BSD-1-Clause
  ********************************************************************/
 
-#include <cstdint>
+#include <stdint.h>
 #include "CThread.hpp"
 #include "common/Utils.hpp"
 

source/common/Mth.cpp

@@ -7,7 +7,8 @@
  ********************************************************************/
 
 #include <cmath>
-#include <cstdint>
+#include <stdint.h>
+#include <stdlib.h>
 
 #include "Mth.hpp"
 

source/common/Random.cpp

@@ -7,7 +7,6 @@
  ********************************************************************/
 
 #include "Random.hpp"
-#include "common/Utils.hpp"
 
 /* Period parameters */
 #define N 624

source/common/Random.hpp

@@ -8,8 +8,9 @@
 
 #pragma once
 
-#include <cstdint>
+#include <stdint.h>
 #include "LongHack.hpp"
+#include "common/Utils.hpp"
 
 // This appears to be VERY similar to https://github.com/SethRobinson/proton/blob/master/shared/util/CRandom.h#L10
 // It turns out, RTsoft, Mojang, and the author of Game Coding Complete used the same reference implementation of

source/common/Util.hpp

@@ -23,7 +23,7 @@ public:
 	template<typename T>
 	static bool remove(std::vector<T>& vec, const T& t)
 	{
-		auto iter = std::find(vec.begin(), vec.end(), t);
+		typename std::vector<T>::iterator iter = std::find(vec.begin(), vec.end(), t);
 		if (iter == vec.end())
 			return false;
 
@@ -36,7 +36,7 @@ public:
 	{
 		int removed = 0;
 
-		for (auto it = toRemove.begin(); it != toRemove.end(); it++)
+		for (typename std::vector<T>::const_iterator it = toRemove.begin(); it != toRemove.end(); it++)
 		{
 			T rem = *it;
 

source/common/Utils.hpp

@@ -21,9 +21,12 @@
 #endif
 
 #include <string>
+#include <sstream>
 
 #ifdef USE_OLD_CPP
 #define constexpr const
+#define nullptr NULL
+#define override
 #endif
 
 #if defined(_WIN32)
@@ -579,6 +582,9 @@ struct TilePos : Pos
 #define SAFE_DELETE(ptr) do { if (ptr) delete ptr; } while (0)
 #define SAFE_DELETE_ARRAY(ptr) do { if (ptr) delete[] ptr; } while (0)
 
+#define SSTR( x ) static_cast< std::ostringstream & >( \
+		( std::ostringstream() << std::dec << x ) ).str()
+
 typedef uint8_t TileID;
 
 // functions from Mojang