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    Length: 1097 (0x449)
    Types: TextFile
    Names: »perm.c«

└─⟦87ddcff64⟧ Bits:30001253 CPHDIST85 Tape, 1985 Autumn Conference Copenhagen
    └─⟦this⟧ »cph85dist/stat/src/perm.c« 

TextFile

#include "unixstat.h"
PGM(perm,Randomly Permut Lines,5.0,3/4/85)
/* Copyright (c) 1982 Gary Perlman (see Copyright file) */

#ifdef SMALL_MEM
#define MAXLINES  250
#else
#define MAXLINES 1000
#endif

main (argc, argv) char **argv;
	{
	char	*lptr[MAXLINES];
	int 	nlines;
	int 	lineno;
	ARGV0;
	ERROPT (1)
	checkstdin (Argv0);
	nlines = readlines (lptr, MAXLINES);
	strpermut (lptr, nlines);
	for (lineno = 0; lineno < nlines; lineno++)
		puts (lptr[lineno]);
	exit (0);
	}

readlines (lptr, maxlines)
char	**lptr;
int 	maxlines;
	{
	int 	nlines;
	char	line[BUFSIZ];
	unsigned len;
	for (nlines = 0; gets (line); nlines++)
		{
		if (nlines == maxlines)
			ERRMANY (lines, maxlines)
		len = strlen (line);
		if ((lptr[nlines] = malloc (len+1)) == NULL)
			ERRSPACE (lines)
		strcpy (lptr[nlines], line);
		}
	return (nlines);
	}

strpermut (array, size) char *array[];
	{
	int 	i, irand;
	char	*temp;
	extern	double Maxrand;
	initrand ();
	for (i = 0; i < size; i++)
		{
		irand = (int) (rand () / Maxrand * (size-i)) + i;
		temp = array[i];
		array[i] = array[irand];
		array[irand] = temp;
		}
	}