Rename 'Standard Gaming Platform' to 'sgp' (#246)

* rename 'Standard Gaming Platform' to 'sgp'

* Adapt CMakeLists.txt files to renamed SGP directory

* Lowercase it

sgp/Random.cpp

@@ -0,0 +1,114 @@
+#include "Random.h"
+#include "debug control.h"
+
+extern bool is_client;
+extern bool is_server;
+extern bool is_networked;
+
+bool gfMPDebugOutputRandoms = false;
+
+// OJW - 091024 - MP random syncing
+// need to syncronise the randomness of events in a multiplayer game on all clients
+UINT32 MPPreRandom( UINT32 uiRange )
+{
+	UINT32 uiNum;
+	if( uiRange == 0 )
+		return 0;
+	//Extract the current pregenerated number
+	uiNum = guiPreRandomNums[ guiPreRandomIndex ] * uiRange / RAND_MAX % uiRange;
+
+	if (gfMPDebugOutputRandoms)
+	{
+		char tmpMPDbgString[512];
+		sprintf(tmpMPDbgString,"MPPreRandom ( uiRange : %i , uiPreRandomIndex : %i , uiResult : %i  )\n",uiRange, guiPreRandomIndex , uiNum );
+		MPDebugMsg(tmpMPDbgString);
+	}
+
+	//Go to the next index.
+	guiPreRandomIndex++;
+
+	if (guiPreRandomIndex >= MAX_PREGENERATED_NUMS)
+		guiPreRandomIndex = 0;
+
+	return uiNum;
+}
+
+#ifdef BMP_RANDOM//dnl ch55 111009
+
+#include <windows.h>
+
+UINT32 guiPreRandomIndex;
+UINT32 guiPreRandomNums[MAX_PREGENERATED_NUMS];
+
+#include <random>
+
+std::random_device gRandomDevice;     // only used once to initialize (seed) engine
+std::mt19937 gRandomNumberGenerator(gRandomDevice());    // random-number engine used (Mersenne-Twister in this case)
+
+UINT32 NewRandom(UINT32 max)
+{
+	if (is_networked && is_client)
+		return MPPreRandom(max);
+
+	if (max <= 1)
+		return 0;
+
+	UINT32 min = 0;
+
+	std::uniform_int_distribution<int> uni(min, max - 1); // guaranteed unbiased
+
+	auto random_integer = uni(gRandomNumberGenerator);
+	return random_integer;
+}
+
+UINT32 GetRndNum(UINT32 maxnum)
+{
+	if (is_networked && is_client)
+		return MPPreRandom(maxnum);
+
+	static UINT32 rnd=0, cnt=0;
+	POINT pt;
+
+	if(!(cnt++%RAND_MAX))
+	{
+		GetCursorPos(&pt);// Get cursor location
+		srand(maxnum ^ rnd ^ pt.x ^ pt.y ^ GetTickCount());
+	}
+	if(maxnum == 0)
+		return(0);
+	rnd = rand();
+	rnd <<= 11;
+	rnd ^= rand();
+	rnd <<= 7;
+	rnd ^= rand();
+	return(rnd % maxnum);
+}
+
+void InitializeRandom(void)
+{
+	// Pregenerate all of the random numbers.
+	for(guiPreRandomIndex = 0; guiPreRandomIndex<MAX_PREGENERATED_NUMS; guiPreRandomIndex++)
+		guiPreRandomNums[guiPreRandomIndex] = GetRndNum(0xFFFFFFFF);
+	guiPreRandomIndex = 0;
+}
+
+#else
+
+UINT32 guiPreRandomIndex = 0;
+std::vector<UINT32> guiPreRandomNums(MAX_PREGENERATED_NUMS, 0);
+
+void InitializeRandom()
+{
+	// Seed the random-number generator with current time so that
+	// the numbers will be different every time we run.
+	srand( (unsigned) time(NULL) );
+
+	//Pregenerate all of the random numbers.
+	for( guiPreRandomIndex = 0; guiPreRandomIndex < MAX_PREGENERATED_NUMS; guiPreRandomIndex++ )
+	{
+		guiPreRandomNums[ guiPreRandomIndex ] = rand();
+	}
+	guiPreRandomIndex = 0;
+}
+
+#endif