#ifdef	ournix
#include "ournix.h"
#endif
char sccsID[] =
 "@(#) date_ver.c V1.8 Copyright Julian H. Stacey, Munich, April 1988\n" ;

/* manual exists
	generate C char string with revision date in either text string 
	or long numeric */

#include <stdio.h>
#include <sys/types.h>
#ifdef	MSDOS	/* { */
#include <time.h>		/* needed for ctime */
#endif		/* } */

extern	char	*ctime() ;
extern	long	time() ;
extern	long	atol() ;

char	**ARGV ;
int	ARGC ;

main(argc,argv)
	int	argc ;
	char	**argv ;
	{
	char	dateline[50] ;
	char	*strip_p ;
	long	time_now	= 0L ;
	typedef char FLAG ;
	FLAG	numeric		= 0 ;
	FLAG	genesis		= 0 ;	/* 1 if beginning of time */
	time_t	later		= (time_t)0 ;
	char	*beginning	= (char *)0 ;
	char	*end		= (char *)0 ;
	char	*name		= "time_stamp" ;
	char	*loc_include	= (char *)0 ;
	char	*sys_include	= (char *)0 ;
	char	*out_name	= (char *)0 ;
	FILE	*out_file	= stdout ;

	ARGC = argc ; ARGV = argv ;
#ifdef	VSL	/* { */
#include	"../../include/vsl.h"
#endif		/* } */
	while (argc-- && (**++argv == '-'))
		switch ( *++*argv)
			{
			case 'i':	loc_include = ++*argv ;		break ;
			case 'I':	sys_include = ++*argv ;		break ;
				/* 'i' and 'I' exists because UCB make cant
				pass # character to this program */
			case 'b':	beginning = ++*argv ;		break ;
			case 'e':	end = ++*argv ;			break ;
			case 'n':	numeric = 1 ;			break ;
			case 't':	numeric = 0 ;			break ;
			case 'v':	name = ++*argv ;		break ;
			case 'o':	out_name = ++*argv ;		break ;
					/* no check is made as to whether file
					is linked etc (ie the file is treated
					as a simple msdos file, with no Unix
					specialities allowed for). */
			case 'd':	/* days after now */
					later = (time_t)24 * 
						(time_t)60 * 
						(time_t)60 * 
						(time_t)atol(++*argv);
					break ;
			case '0':	genesis = 1 ; break ;
			default :	syntax() ;
			}
	if (argc > 1) syntax() ;
	if (argc == 1 ) name = *argv ;
	if (!genesis) (void)time(&time_now);
	time_now += later ;
	if ((out_name != (char *)0) &&
		((out_file = fopen(out_name,"w")) == (FILE *)0))
			{
			fprintf(stderr,"%s: Aborting, couldnt open %s.\n",
				*ARGV, out_name) ;
			exit(1) ;
			}
	if (beginning != (char *)0)	fprintf(out_file,"%s\n",beginning) ;
	if (sys_include != (char *)0)	
		fprintf(out_file, "#include <%s>\n" ,sys_include) ;
	if (loc_include != (char *)0)	
		fprintf(out_file, "#include \"%s\"\n" ,loc_include) ;
		/* later expand to multiple include possibly */
	if (!numeric)
		{
		(void) strcpy(dateline,ctime(&time_now));
		/* remove \n from end of line */
		for (strip_p = dateline ; *strip_p++ ;); *(strip_p - 2) = '\0';
		fprintf(out_file,"char %s[] = \"%s\"", name, dateline );
		}
	else	
	fprintf(out_file,"time_t %s = (time_t) %ldL",name, (long)time_now );
	fprintf(out_file," ; %c%c from %s %c%c \n", '/','*',*ARGV,'*','/' );
	if (end != (char *)0)		fprintf(out_file,"%s\n",end) ;
	if (out_name != (char *)0) (void) fclose(out_file) ;
	exit(0) ;
	}

syntax()
	{
	fprintf(stderr,
 "Error, Correct syntax is:\n\t%s [-0] [-n] [-t] [-iIncludeLocalName] [-IincludeSystemName]\n\t[-dDays] [-oOutput_file] [-bBeginText] [-eEndText] [-vVariableName]\n", *ARGV);
	exit(1) ;
	}