exactlyOneBitIsSet()
[Bit-twiddling Functions]

exactlyOneBitIsSet(i) provides a very fast way to determine whether an integral type has exactly one bit set. More...

Functions
bool	exactlyOneBitIsSet (unsigned char v)
bool	exactlyOneBitIsSet (unsigned short v)
bool	exactlyOneBitIsSet (unsigned int v)
bool	exactlyOneBitIsSet (unsigned long v)
bool	exactlyOneBitIsSet (unsigned long long v)
bool	exactlyOneBitIsSet (signed char v)
bool	exactlyOneBitIsSet (char v)
bool	exactlyOneBitIsSet (short v)
bool	exactlyOneBitIsSet (int v)
bool	exactlyOneBitIsSet (long v)
bool	exactlyOneBitIsSet (long long v)

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Detailed Description

exactlyOneBitIsSet(i) provides a very fast way to determine whether an integral type has exactly one bit set.

For unsigned and positive signed values, this is equivalent to the value being a power of two. Note that negative powers of two are not represented with a single bit set -- negate it first if you want to use this routine to determine if a signed value is a negative power of two.

See also:

atMostOneBitIsSet()

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Function Documentation

bool SimTK::exactlyOneBitIsSet

(

long long

v

)

[inline]

References SimTK::atMostOneBitIsSet().

bool SimTK::exactlyOneBitIsSet

(

long

v

)

[inline]

References SimTK::atMostOneBitIsSet().

bool SimTK::exactlyOneBitIsSet

(

int

v

)

[inline]

References SimTK::atMostOneBitIsSet().

bool SimTK::exactlyOneBitIsSet

(

short

v

)

[inline]

References SimTK::atMostOneBitIsSet().

bool SimTK::exactlyOneBitIsSet

(

char

v

)

[inline]

References SimTK::atMostOneBitIsSet().

bool SimTK::exactlyOneBitIsSet

(

signed char

v

)

[inline]

References SimTK::atMostOneBitIsSet().

bool SimTK::exactlyOneBitIsSet

(

unsigned long long

v

)

[inline]

References SimTK::atMostOneBitIsSet().

bool SimTK::exactlyOneBitIsSet

(

unsigned long

v

)

[inline]

References SimTK::atMostOneBitIsSet().

bool SimTK::exactlyOneBitIsSet

(

unsigned int

v

)

[inline]

References SimTK::atMostOneBitIsSet().

bool SimTK::exactlyOneBitIsSet

(

unsigned short

v

)

[inline]

References SimTK::atMostOneBitIsSet().

bool SimTK::exactlyOneBitIsSet

(

unsigned char

v

)

[inline]

References SimTK::atMostOneBitIsSet().