lautil.h File Reference

A few general utilities. More...

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Functions
int	ilaenv_ (int *i, const char *n, const char *opts, int *n1, int *n2, int *n3, int *n4, ftnlen n_len, ftnlen opts_len)
void	LaSwap (LaGenMatDouble &A, LaVectorLongInt &ipiv)
int	LaEnvBlockSize (const char *fname, const LaGenMatDouble &A)
int	LaEnvBlockSize (const char *fname, const LaGenMatComplex &A)
double	Mach_eps_double ()

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Detailed Description

A few general utilities.

Some (very few) utility functions that should have been included in C++ (sic?!)

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Function Documentation

int ilaenv_	(	int *	i,
		const char *	n,
		const char *	opts,
		int *	n1,
		int *	n2,
		int *	n3,
		int *	n4,
		ftnlen	n_len,
		ftnlen	opts_len
	)

void LaSwap	(	LaGenMatDouble &	A,
		LaVectorLongInt &	ipiv
	)

Performs a series of row interchanges on the matrix A. Uses dlaswp internally.

Parameters:

	A	The matrix A whose rows are interchanged.
	ipiv	The vector of pivot indices. ipiv(K)=L implies rows K and L are interchanged.

int LaEnvBlockSize	(	const char *	fname,
		const LaGenMatDouble &	A
	)

int LaEnvBlockSize	(	const char *	fname,
		const LaGenMatComplex &	A
	)

double Mach_eps_double

(

)

Determine double precision machine parameters. Uses dlamch internally. Returns the "relative machine precision".

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