/*
 * $Copyright:	$
 * Copyright (c) 1984, 1985, 1986, 1987, 1988, 1989, 1990 
 * Sequent Computer Systems, Inc.   All rights reserved.
 *  
 * This software is furnished under a license and may be used
 * only in accordance with the terms of that license and with the
 * inclusion of the above copyright notice.   This software may not
 * be provided or otherwise made available to, or used by, any
 * other person.  No title to or ownership of the software is
 * hereby transferred.
 *
 */

/*	Copyright (c) 1984 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

#ident	"$Header: gamma.c 1.3 89/10/10 $@(#)graf:src/stat.d/gamma.c	1.4"
/* <:t-5 d:> */
#include "stdio.h"
#include "s.h"
char *nodename;

struct options {
	int col;	/* columns per output line */
} op = { DFLTCOL };

extern int signgam;	/* used by gamma() for sign of result */

main(argc,argv) /*gamma function */
int argc;
char *argv[];
{
	FILE *fdi;
	int ac, argf, i;
	char **av, *cp;
	double x, gamma(), exp();
	char label[MAXLABEL];

	nodename = *argv;
	for( ac=argc-1,av=argv+1; ac>0; ac--,av++ )
		if( *(cp=av[0])=='-' && *++cp!='\0' ) {
			while( *cp!='\0' )
				switch(*cp++) {
				case 'c': SETINT(op.col,cp); break;
				case ' ': case ',': break;
				default: ERRPR1(%c?,*(cp-1));
				}
			--argc;
		}
	if(argc <= 1) { argc=2; argf=0; } /* no args, use stdin */
	else argf=1;

	while(argc-- > 1) {
		if( strcmp(*++argv,"-")==0 || !argf ) fdi=stdin;
		else if( **argv!='-' ) {
			if( (fdi=fopen(*argv,"r"))==NULL ) {
				ERRPR1(cannot open %s, *argv);
				continue;
			}
		} else { argc++; continue; }

		TITOUT1(fdi,label,MAXLABEL,gamma);
		for(i=1; getdoub(fdi,&x)!=EOF; i++)
			{x=exp(gamma(x)); PRINT(signgam * x,i,op.col);}
		if(i%op.col != 1) putchar('\n');
		fclose(fdi);
	}
	exit(0);
}
