Log and Exponential functions

Log and exponential functions. More...

Defines
#define	pow2i(x)   ((x)<0 ? 0 : (1<<(x)))
	Integer 2^x.
Functions
int	SPUC::needed_bits (int n)
	Calculate how many bits are needed to represent the integer n.
int	SPUC::needed_bits (double n)
	The number of bits needed to encode {n} symbols. (Yes, it is exact!).
int	SPUC::pow2 (int x)
	Calculate two to the power of x (2^x).
double	SPUC::pow2 (double x)
	Calculate two to the power of x (2^x).
double	SPUC::pow10 (double x)
	Calculate ten to the power of x (10^x).
double	SPUC::dB (double x)
	Decibel of x (10*log10(x)).
double	SPUC::inv_dB (double x)
	Inverse of decibel.

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Detailed Description

Log and exponential functions.

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Define Documentation

#define pow2i (  x   )     ((x)<0 ? 0 : (1<<(x)))

Integer 2^x.

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Function Documentation

double SPUC::dB (  double  x  )  [inline]

Decibel of x (10*log10(x)).

double SPUC::inv_dB (  double  x  )  [inline]

Inverse of decibel.

int SPUC::needed_bits (  double  n  )  [inline]

The number of bits needed to encode {n} symbols. (Yes, it is exact!). Here is the call graph for this function:

int SPUC::needed_bits (  int  n  )  [inline]

Calculate how many bits are needed to represent the integer n.

double SPUC::pow10 (  double  x  )  [inline]

Calculate ten to the power of x (10^x).

double SPUC::pow2 (  double  x  )  [inline]

Calculate two to the power of x (2^x).

int SPUC::pow2 (  int  x  )  [inline]

Calculate two to the power of x (2^x).

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