General Number Utilities

Files
file	eg_nummacros.h
	This file provide the user interface and function definitions for general number utilities.
Defines
#define	EGabs(var)
	a general macro to return the absolute value of the given variable
#define	EGmax(a, b)
	given two variables (of the same type, and of some predefined type) return the maximum value among the two of them.
#define	EGmin(a, b)
	given two variables (of the same type, and of some predefined type) return the minimum value among the two of them.
#define	EGswap(N1, N2, Ntmp)
	Given tree numbers N1, N2 and Ntmp, swap values of N1 and N2 using Ntmp as a temporal number. The variables should be of some primitive type of C for this macro to work.

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Detailed Description

Here we put some utilities common for number.

History:

Revision 0.0.2

• 2007-10-08
  • Move EGabs, EGswap, EGmin and EGmax to this file

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Define Documentation

#define EGabs

(

var

)

Value:

({\
    const typeof(var) __EGav = (var);\
    (__EGav < 0) ? -__EGav : __EGav;})

a general macro to return the absolute value of the given variable

Parameters:

var

variable whose absolute value we want to compute.

Returns:

value of the absolute value of the given variable, note that this macro will only work in built-in types, and will use the default comparison for those internal types.

Definition at line 75 of file eg_nummacros.h.

#define EGmax	(		a,
			b
	)

Value:

({\
  const typeof(a) __EGma = (a);\
  const typeof(b) __EGmb = (b);\
  (__EGma > __EGmb ? __EGma : __EGmb);})

given two variables (of the same type, and of some predefined type) return the maximum value among the two of them.

Definition at line 56 of file eg_nummacros.h.

#define EGmin	(		a,
			b
	)

Value:

({\
  const typeof(a) __EGma = (a);\
  const typeof(b) __EGmb = (b);\
  (__EGma < __EGmb ? __EGma : __EGmb);})

given two variables (of the same type, and of some predefined type) return the minimum value among the two of them.

Examples:

eg_dmatrix.ex.c.

Definition at line 64 of file eg_nummacros.h.

Referenced by main().

#define EGswap	(		N1,
			N2,
			Ntmp
	)

Value:

do{\
  Ntmp = N1;\
  N1 = N2;\
  N2 = Ntmp;} while(0)

Given tree numbers N1, N2 and Ntmp, swap values of N1 and N2 using Ntmp as a temporal number. The variables should be of some primitive type of C for this macro to work.

Parameters:

	N1	first number.
	N2	second number.
	Ntmp	temporal variable.

Definition at line 48 of file eg_nummacros.h.

Referenced by EGcharPermSort().