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//
// Random
//
// An Objective-C class for NeXT computers to provide services for random
// number generation.
//
// History:
// pre 1990 Mar 23
// Used random number generation algorithm from K&R.
// 1990 Mar 23
// Modified to use algorithm with cycle length of 8.8 trillion.
// 1990 Mar 26
// * Added archiving.
// * Added randMax:, randMin:Max:, and percent:.
// 1991 Apr 26
// * Changed to use +alloc and -init as all NeXTStep 2.0 objects should.
// 1991 May 30
// * Prepared for distribution and initial release.
// 1991 Nov 05
// * Added - (BOOL)bool method.
// 1991 Dec 30
// * Changed - (float)percent to return double instead.
// * Added - (double)randFunc: method.
// 1992 Feb 27
// * Added Gaussian functionality.
// 1992 Apr 02
// * New version, 2.0.
// * New Architecture: Split generation/interpretation.
//
// Version 2.0, 1992 Apr 02
//
// Written by Gregor Purdy
// gregor@umich.edu
//
// See the README file included for information
// and distribution and usage rights.
//
// Copyright (C) 1992 Contemporary Design Studios. All rights reserved.
//
#import <objc/Object.h>
#import <objc/typedstream.h>
#import "RandomEngine.h"
#define RAND_RANGE ((ulong)0xffffffff)
typedef double (*ddfunc)(double); // Double Function Returning Double.
@interface Random : Object
{
id engineClass; // Class for generation.
ulong unit; // Unit of generation for generation class.
uchar bitbuffer; // Buffer of random bits.
uchar *bytebuffer; // Buffer of random bits.
ulong curbit; // Current location in the buffer.
ulong curbyte; // Current location in the buffer.
id engine; // The actual engine.
}
+ (int)version; // Version of the class.
- initEngineClass:aClass; // Use the class given for generation.
- initEngineInstance:anObject; // Use the instance given for generation.
// THIS IS THE DESIGNATED INITIALIZER.
- (ulong)rand; // Return a random integer.
- (ulong)randMax:(ulong)max; // Return a random integer 0 <= x <= max.
- (ulong)randMin:(ulong)min // Return a random integer min <= x <= max.
max:(ulong)max;
- (double)percent; // Return a random double 0.0 <= x <= 1.0.
- (BOOL)bool; // Return randomly, YES or NO.
- (double)randFunc:(ddfunc)func; // See description file.
- read:(NXTypedStream *)stream; // De-archive from a typed stream.
- write:(NXTypedStream *)stream; // Archive to a typed stream.
@end
//
// End of file.
//These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.