steghide 0.5.1
AUtils Class Reference

provides some generic functions for non-standard arithmetic operations

#include <AUtils.h>

Static Public Member Functions

template<class T>
static T max (T a, T b)
template<class T>
static T min (T a, T b)
template<class T>
static T div_roundup (T a, T b)
template<class T>
static T bminus (T a, T b)
template<class T, T top>
static T bplus (T a, T b)
template<class T>
static T bplus (T a, T b, T top)
template<class T, class CTYPE>
static T modsum (T *s, CTYPE n, T m)
template<class IT, class FT>
static IT roundup (FT x)
template<class T>
static T log2_ceil (T n)

Member Function Documentation

◆ bminus()

template<class T>
T AUtils::bminus ( T a,
T b )
static

substraction with the modification to return 0 (T()) for negative difference (needs >, -, T())

◆ bplus() [1/2]

template<class T, T top>
T AUtils::bplus ( T a,
T b )
static

addition with the modification to return top for sums that are larger than top

◆ bplus() [2/2]

template<class T>
T AUtils::bplus ( T a,
T b,
T top )
static

◆ div_roundup()

template<class T>
T AUtils::div_roundup ( T a,
T b )
static

returns a divided through b rounded up to nearest "integer" (needs =, –, +, /)

◆ log2_ceil()

template<class T>
T AUtils::log2_ceil ( T n)
static

compute 2-logarithm of n (rounded up to nearest int), i.e. number of bits needed to store values from {0,...,n-1}

◆ max()

template<class T>
T AUtils::max ( T a,
T b )
static

return the maximum of a and b (needs >)

◆ min()

template<class T>
T AUtils::min ( T a,
T b )
static

return the minimum of a and b (needs <)

◆ modsum()

template<class T, class CTYPE>
T AUtils::modsum ( T * s,
CTYPE n,
T m )
static

calculate the sum s[0]+...s[n-1] modulo m (needs =, +, % for T and =, CTYPE(), <, ++ for CTYPE)

◆ roundup()

template<class IT, class FT>
IT AUtils::roundup ( FT x)
static

round up x to nearest integer


The documentation for this class was generated from the following file: