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/ScreenTextEntry.cpp

@@ -15,6 +15,8 @@
 #include "LuaBinding.h"
 #include "arch/ArchHooks/ArchHooks.h" // HOOKS->GetClipboard()
 
+#include <cmath>
+
 static const char* g_szKeys[NUM_KeyboardRow][KEYS_PER_ROW] =
 {
 	{"A","B","C","D","E","F","G","H","I","J","K","L","M"},
@@ -50,18 +52,18 @@ namespace
 	LuaReference g_FormatAnswerForDisplayFunc;
 };
 
-void ScreenTextEntry::SetTextEntrySettings( 
-	RString sQuestion, 
-	RString sInitialAnswer, 
+void ScreenTextEntry::SetTextEntrySettings(
+	RString sQuestion,
+	RString sInitialAnswer,
 	int iMaxInputLength,
-	bool(*Validate)(const RString &sAnswer,RString &sErrorOut), 
-	void(*OnOK)(const RString &sAnswer), 
+	bool(*Validate)(const RString &sAnswer,RString &sErrorOut),
+	void(*OnOK)(const RString &sAnswer),
 	void(*OnCancel)(),
 	bool bPassword,
 	bool (*ValidateAppend)(const RString &sAnswerBeforeChar, RString &sAppend),
 	RString (*FormatAnswerForDisplay)(const RString &sAnswer)
 	)
-{	
+{
 	g_sQuestion = sQuestion;
 	g_sInitialAnswer = sInitialAnswer;
 	g_iMaxInputLength = iMaxInputLength;
@@ -72,13 +74,13 @@ void ScreenTextEntry::SetTextEntrySettings(
 	g_pFormatAnswerForDisplay = FormatAnswerForDisplay;
 }
 
-void ScreenTextEntry::TextEntry( 
-	ScreenMessage smSendOnPop, 
-	RString sQuestion, 
-	RString sInitialAnswer, 
+void ScreenTextEntry::TextEntry(
+	ScreenMessage smSendOnPop,
+	RString sQuestion,
+	RString sInitialAnswer,
 	int iMaxInputLength,
-	bool(*Validate)(const RString &sAnswer,RString &sErrorOut), 
-	void(*OnOK)(const RString &sAnswer), 
+	bool(*Validate)(const RString &sAnswer,RString &sErrorOut),
+	void(*OnOK)(const RString &sAnswer),
 	void(*OnCancel)(),
 	bool bPassword,
 	bool (*ValidateAppend)(const RString &sAnswerBeforeChar, RString &sAppend),
@@ -224,7 +226,7 @@ bool ScreenTextEntry::Input( const InputEventPlus &input )
 				break;
 		}
 	}
-	
+
 	if( input.DeviceI == DeviceInput(DEVICE_KEYBOARD, KEY_RCTRL) )
 	{
 		switch( input.type )
@@ -239,7 +241,7 @@ bool ScreenTextEntry::Input( const InputEventPlus &input )
 				break;
 		}
 	}
-	
+
 	bool bHandled = false;
 	if( input.DeviceI == DeviceInput(DEVICE_KEYBOARD, KEY_BACK) )
 	{
@@ -260,11 +262,11 @@ bool ScreenTextEntry::Input( const InputEventPlus &input )
 		if( ( c == L'v' || c == L'V' ) && ( bLCtrl || bRCtrl ) )
 		{
 			TryAppendToAnswer( HOOKS->GetClipboard() );
-			
+
 			TextEnteredDirectly(); // XXX: This doesn't seem appropriate but there's no TextPasted()
 			bHandled = true;
 		}
-		else if( c >= L' ' ) 
+		else if( c >= L' ' )
 		{
 			// todo: handle caps lock -aj
 			TryAppendToAnswer( WStringToRString(std::wstring()+c) );
@@ -327,7 +329,7 @@ void ScreenTextEntry::End( bool bCancelled )
 {
 	if( bCancelled )
 	{
-		if( g_pOnCancel ) 
+		if( g_pOnCancel )
 			g_pOnCancel();
 
 		Cancel( SM_GoToNextScreen );
@@ -684,8 +686,8 @@ void ScreenTextEntryVisual::BeginScreen()
 		for( int x=0; x<KEYS_PER_ROW; ++x )
 		{
 			BitmapText &bt = *m_ptextKeys[r][x];
-			float fX = roundf( SCALE( x, 0, KEYS_PER_ROW-1, ROW_START_X, ROW_END_X ) );
-			float fY = roundf( SCALE( r, 0, NUM_KeyboardRow-1, ROW_START_Y, ROW_END_Y ) );
+			float fX = std::round( SCALE( x, 0, KEYS_PER_ROW-1, ROW_START_X, ROW_END_X ) );
+			float fY = std::round( SCALE( r, 0, NUM_KeyboardRow-1, ROW_START_Y, ROW_END_Y ) );
 			bt.SetXY( fX, fY );
 		}
 	}
@@ -717,7 +719,7 @@ void ScreenTextEntryVisual::MoveX( int iDir )
 		m_iFocusX += iDir;
 		wrap( m_iFocusX, KEYS_PER_ROW );
 
-		sKey = g_szKeys[m_iFocusY][m_iFocusX]; 
+		sKey = g_szKeys[m_iFocusY][m_iFocusX];
 	}
 	while( sKey == "" );
 
@@ -733,13 +735,13 @@ void ScreenTextEntryVisual::MoveY( int iDir )
 		m_iFocusY = enum_add2( m_iFocusY,  +iDir );
 		wrap( *ConvertValue<int>(&m_iFocusY), NUM_KeyboardRow );
 
-		// HACK: Round to nearest option so that we always stop 
+		// HACK: Round to nearest option so that we always stop
 		// on KEYBOARD_ROW_SPECIAL.
 		if( m_iFocusY == KEYBOARD_ROW_SPECIAL )
 		{
 			for( int i=0; true; i++ )
 			{
-				sKey = g_szKeys[m_iFocusY][m_iFocusX]; 
+				sKey = g_szKeys[m_iFocusY][m_iFocusX];
 				if( sKey != "" )
 					break;
 
@@ -749,7 +751,7 @@ void ScreenTextEntryVisual::MoveY( int iDir )
 			}
 		}
 
-		sKey = g_szKeys[m_iFocusY][m_iFocusX]; 
+		sKey = g_szKeys[m_iFocusY][m_iFocusX];
 	}
 	while( sKey == "" );
 
@@ -820,7 +822,7 @@ bool ScreenTextEntryVisual::MenuStart( const InputEventPlus &input )
 /*
  * (c) 2001-2004 Chris Danford
  * 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
@@ -830,7 +832,7 @@ bool ScreenTextEntryVisual::MenuStart( const InputEventPlus &input )
  * 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