masks.cpp File Reference

#include "masks.h"

Go to the source code of this file.

Functions
bool	checkbit (int &number, int bit_number)
void	dosetbit (int &number, int bit_number)
void	unsetbit (int &number, int bit_number)
void	flipbit (int &number, int bit_number)
float	Delta (float a, float b)

Function Documentation

bool checkbit	(	int &	number,
		int	bit_number
	)

Definition at line 3 of file masks.cpp.

Referenced by NavigationSystem::Draw(), NavigationSystem::DrawButton(), NavigationSystem::DrawObjectives(), NavigationSystem::DrawSystem(), navscreenoccupied::findfreefloat(), and flipbit().

{
    if ( (bit_number > 31) || (bit_number < 0) )
        return 0;
    if ( ( number&(1<<bit_number) ) != 0 )
        return 1;

    else
        return 0;
}

float Delta	(	float	a,
		float	b
	)

Definition at line 43 of file masks.cpp.

References b.

Referenced by Opcode::SAP_PairData::AddPair(), drawlistitem(), NavigationSystem::DrawMission(), OPC_PointAABBSqrDist(), and NavigationSystem::TestIfInRangeBlk().

{
    float ans = a-b;
    if (ans < 0)
        return -1.0*ans;
    else
        return ans;
}

void dosetbit	(	int &	number,
		int	bit_number
	)

Definition at line 14 of file masks.cpp.

Referenced by NavigationSystem::DrawButton(), navscreenoccupied::findfreefloat(), flipbit(), and NavigationSystem::ParseFile().

{
    if ( (bit_number > 31) || (bit_number < 0) )
        return;
    number = ( number|(1<<bit_number) );
}

void flipbit	(	int &	number,
		int	bit_number
	)

Definition at line 33 of file masks.cpp.

References checkbit(), dosetbit(), and unsetbit().

Referenced by NavigationSystem::DrawButton().

{
    if ( (bit_number > 31) || (bit_number < 0) )
        return;
    if (checkbit( number, bit_number ) == 1)
        unsetbit( number, bit_number );
    else
        dosetbit( number, bit_number );
}

void unsetbit	(	int &	number,
		int	bit_number
	)

Definition at line 21 of file masks.cpp.

Referenced by NavigationSystem::ClearPriorities(), NavigationSystem::DrawButton(), NavigationSystem::DrawSystem(), flipbit(), and NavigationSystem::Setup().

{
    if ( (bit_number > 31) || (bit_number < 0) )
        return;
    int temp = 0;
    if (bit_number != 0)
        temp = ( ( 0xffffffff<<(bit_number+1) )|( 0xffffffff>>(32-bit_number) ) );
    else
        temp = ( 0xffffffff<<(bit_number+1) );
    number = number&temp;
}