exactlyOneBitIsSet()

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

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

(

unsigned char

v

)

[inline]

bool SimTK::exactlyOneBitIsSet

(

unsigned short

v

)

[inline]

bool SimTK::exactlyOneBitIsSet

(

unsigned int

v

)

[inline]

bool SimTK::exactlyOneBitIsSet

(

unsigned long

v

)

[inline]

bool SimTK::exactlyOneBitIsSet

(

unsigned long long

v

)

[inline]

bool SimTK::exactlyOneBitIsSet

(

signed char

v

)

[inline]

bool SimTK::exactlyOneBitIsSet

(

char

v

)

[inline]

bool SimTK::exactlyOneBitIsSet

(

short

v

)

[inline]

bool SimTK::exactlyOneBitIsSet

(

int

v

)

[inline]

bool SimTK::exactlyOneBitIsSet

(

long

v

)

[inline]

bool SimTK::exactlyOneBitIsSet

(

long long

v

)

[inline]