Clean up math functions

- Remove checking for standard functions from the build system
- Prefix all invocations with std::
- Replace suffixed functions with unprefixed versions
- Include <cmath> in all files that use it and remove the global include

e.g. floorf(x) -> std::floor(x)

src/PlayerStageStats.cpp

@@ -3,7 +3,6 @@
 #include "RageLog.h"
 #include "ThemeManager.h"
 #include "LuaManager.h"
-#include <float.h>
 #include "GameState.h"
 #include "Course.h"
 #include "Steps.h"
@@ -11,6 +10,8 @@
 #include "PrefsManager.h"
 #include "CommonMetrics.h"
 
+#include <cfloat>
+#include <cmath>
 #include <numeric>
 
 #define GRADE_PERCENT_TIER(i)	THEME->GetMetricF("PlayerStageStats",ssprintf("GradePercent%s",GradeToString((Grade)i).c_str()))
@@ -151,7 +152,7 @@ void PlayerStageStats::AddStats( const PlayerStageStats& other )
 		Combo_t &combo = m_ComboList[i];
 		const float PrevComboEnd = prevcombo.m_fStartSecond + prevcombo.m_fSizeSeconds;
 		const float ThisComboStart = combo.m_fStartSecond;
-		if( fabsf(PrevComboEnd - ThisComboStart) > 0.001 )
+		if( std::abs(PrevComboEnd - ThisComboStart) > 0.001 )
 			continue;
 
 		// These are really the same combo.
@@ -261,7 +262,7 @@ float PlayerStageStats::MakePercentScore( int iActual, int iPossible )
 
 	// TRICKY: printf will round, but we want to truncate. Otherwise, we may display
 	// a percent score that's too high and doesn't match up with the calculated grade.
-	float fTruncInterval = powf( 0.1f, (float)iPercentTotalDigits-1 );
+	float fTruncInterval = std::pow( 0.1f, (float)iPercentTotalDigits-1 );
 
 	// TRICKY: ftruncf is rounding 1.0000000 to 0.99990004. Give a little boost
 	// to fPercentDancePoints to correct for this.
@@ -275,7 +276,7 @@ RString PlayerStageStats::FormatPercentScore( float fPercentDancePoints )
 {
 	int iPercentTotalDigits = 3 + CommonMetrics::PERCENT_SCORE_DECIMAL_PLACES;	// "100" + "." + "00"
 
-	RString s = ssprintf( "%*.*f%%", iPercentTotalDigits, 
+	RString s = ssprintf( "%*.*f%%", iPercentTotalDigits,
 			     (int)CommonMetrics::PERCENT_SCORE_DECIMAL_PLACES,
 			     fPercentDancePoints*100 );
 	return s;
@@ -338,7 +339,7 @@ int PlayerStageStats::GetLessonScoreNeeded() const
 {
 	float fScore = std::accumulate(m_vpPossibleSteps.begin(), m_vpPossibleSteps.end(), 0.f,
 		[](float total, Steps const *steps) { return total + steps->GetRadarValues(PLAYER_1)[RadarCategory_TapsAndHolds]; });
-	return lrintf( fScore * LESSON_PASS_THRESHOLD );
+	return std::lrint( fScore * LESSON_PASS_THRESHOLD );
 }
 
 void PlayerStageStats::ResetScoreForLesson()
@@ -398,8 +399,8 @@ void PlayerStageStats::SetLifeRecordAt( float fLife, float fStepsSecond )
 
 	// Memory optimization:
 	// If we have three consecutive records A, B, and C all with the same fLife,
-	// we can eliminate record B without losing data. Only check the last three 
-	// records in the map since we're only inserting at the end, and we know all 
+	// we can eliminate record B without losing data. Only check the last three
+	// records in the map since we're only inserting at the end, and we know all
 	// earlier redundant records have already been removed.
 	std::map<float, float>::iterator C = m_fLifeRecord.end();
 	--C;
@@ -471,7 +472,7 @@ float PlayerStageStats::GetCurrentLife() const
 	if( m_fLifeRecord.empty() )
 		return 0;
 	std::map<float, float>::const_iterator iter = m_fLifeRecord.end();
-	--iter; 
+	--iter;
 	return iter->second;
 }
 
@@ -557,7 +558,7 @@ bool PlayerStageStats::FullComboOfScore( TapNoteScore tnsAllGreaterOrEqual ) con
 {
 	ASSERT( tnsAllGreaterOrEqual >= TNS_W5 );
 	ASSERT( tnsAllGreaterOrEqual <= TNS_W1 );
-   
+
   //if we've set MissCombo to anything besides 0, it's not a full combo
   if( !m_bPlayerCanAchieveFullCombo )
     return false;
@@ -724,7 +725,7 @@ LuaFunction( FormatPercentScore,	PlayerStageStats::FormatPercentScore( FArg(1) )
 // lua start
 #include "LuaBinding.h"
 
-/** @brief Allow Lua to have access to the PlayerStageStats. */ 
+/** @brief Allow Lua to have access to the PlayerStageStats. */
 class LunaPlayerStageStats: public Luna<PlayerStageStats>
 {
 public:
@@ -843,13 +844,13 @@ public:
 
 	static int GetRadarPossible( T* p, lua_State *L ) { p->m_radarPossible.PushSelf(L); return 1; }
 	static int GetRadarActual( T* p, lua_State *L ) { p->m_radarActual.PushSelf(L); return 1; }
-	static int SetScore( T* p, lua_State *L )                
-	{ 
+	static int SetScore( T* p, lua_State *L )
+	{
 		if( IArg(1) >= 0 )
-		{ 
-			p->m_iScore = IArg(1); 
-			return 1; 
-		} 
+		{
+			p->m_iScore = IArg(1);
+			return 1;
+		}
 		COMMON_RETURN_SELF;
 	}
 	static int SetCurMaxScore( T* p, lua_State *L )
@@ -880,7 +881,7 @@ public:
 		}
 		COMMON_RETURN_SELF;
 	}
-  
+
 	static int FailPlayer( T* p, lua_State *L )
 	{
 		p->m_bFailed = true;
@@ -943,7 +944,7 @@ LUA_REGISTER_CLASS( PlayerStageStats )
 /*
  * (c) 2001-2004 Chris Danford, Glenn Maynard
  * All rights reserved.
- * 
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
@@ -953,7 +954,7 @@ LUA_REGISTER_CLASS( PlayerStageStats )
  * copyright notice(s) and this permission notice appear in all copies of
  * the Software and that both the above copyright notice(s) and this
  * permission notice appear in supporting documentation.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF