;
; Program: PWD
; Author: Richard Conn
; Version: 1.0
; Date: 5 Mar 84
;
version	equ	10

;
;	The purpose of PWD is to display the names of the named directories.
; If the option PASS (P) is given, then the passwords to the directories will
; be displayed as well IF the Wheel Byte is Available and Set.  If the Wheel
; Byte is not available, the passwords will be displayed without question.
;

;
; Basic Equates
;
z3env	SET	0f400h	;address of ZCPR3 Environment
fcb	equ	5ch
cr	equ	0dh
lf	equ	0ah

;
; External References
;
	ext	z3init
	ext	cout,crlf,print,padc
	ext	qprint,qcrlf
	ext	getndr,getwhl

;
; Environment Definition
;
	if	z3env ne 0
;
; External ZCPR3 Environment Descriptor
;
	jmp	start
	db	'Z3ENV'	;This is a ZCPR3 Utility
	db	1	;External Environment Descriptor
z3eadr:
	dw	z3env
start:
	lhld	z3eadr	;pt to ZCPR3 environment
;
	else
;
; Internal ZCPR3 Environment Descriptor
;
	MACLIB	Z3BASE.LIB
	MACLIB	SYSENV.LIB
z3eadr:
	jmp	start
	SYSENV
start:
	lxi	h,z3eadr	;pt to ZCPR3 environment
	endif

;
; Start of Program -- Initialize ZCPR3 Environment
;
	call	z3init	;initialize the ZCPR3 Env and the VLIB Env
;
; Print Banner
;
	call	qprint	;check quiet flag
	db	'PWD, Version '
	db	(version/10)+'0','.',(version mod 10)+'0'
	db	cr,lf,0
;
; Check for options
;
	lxi	h,fcb+1	;pt to option char
	mov	a,m	;get option char
	cpi	'/'	;help?
	jz	prhelp
	cpi	' '	;no option?
	jz	namedir
	cpi	'P'	;passwords?
	jnz	invopt	;bad option if not
;
; Prepare to process passwords - check for authorization
;
	call	getwhl	;get wheel byte
	jnz	namedir	;permission granted
	call	print
	db	' Password Request Denied - Not Wheel',cr,lf,0
	mvi	m,' '	;clear option
;
; Print Named Directory Info
;
namedir:
	call	getndr	;get location of directory
	jnz	ndir1
	call	print
	db	' Named Directory Buffer Not Available',0
	ret
;
; Print Names of Directory Elements
;
ndir1:
	lda	fcb+1	;see if passwords included
	cpi	'P'
	jz	ndir1p
;
; Print Header if Not Quiet for Non-Password Entries
;
	mvi	b,4	;4 times
ndir1a:
	call	qprint	;print banner (optional)
	db	' DU : DIR Name    ',0
	dcr	b	;count down
	jnz	ndir1a
	call	qcrlf	;new line
	mvi	b,4	;4 more times
ndir1b:
	call	qprint
	db	'----  --------    ',0
	dcr	b	;count down
	jnz	ndir1b
	call	qcrlf	;new line
	jmp	ndir1z
;
; Print Header if Not Quiet for Password Entries
;
ndir1p:
	mvi	b,2	;2 times
ndir1c:
	call	qprint
	db	' DU : DIR Name - Password    ',0
	dcr	b	;count down
	jnz	ndir1c
	call	qcrlf
	mvi	b,2
ndir1d:
	call	qprint
	db	'----  --------   --------    ',0
	dcr	b	;count down
	jnz	ndir1d
	call	qcrlf
;
; Begin Output Processing
;
ndir1z:
	mvi	c,0	;set entry count
	mvi	b,1	;set disk 1
;
; Print Each Resident Command Name
;
ndir2:
	mov	a,m	;get table entry
	ora	a	;end of table?
	rz		;exit
	cmp	b	;same disk?
	jz	ndir3
;
; Advance to Next Set of Entries for New Disk
;
	mov	b,a	;set new disk
	mov	a,c	;get count
	ani	3	;see if newline already given
	cnz	crlf	;complete current line
	call	crlf	;1 additional line
	mvi	c,0	;reset count
ndir3:
	push	b	;save counters
;
; Print DU:
;
	mov	a,m	;get disk
	adi	'@'	;convert to letter (A to P)
	call	cout
	inx	h	;pt to user
	mov	a,m	;get user
	call	padc	;print user number
	call	print	;print separator
	db	': ',0
	inx	h	;pt to name
;
; Print DIR
;
	call	prname	;print name of directory
	lda	fcb+1	;check for password option
	cpi	'P'
	jnz	ndir4
	call	print
	db	' - ',0
	call	prname	;print name of password
	pop	b	;get counters
	inr	c	;another entry
	push	b	;save counters
	jmp	ndir5
;
; Advance to Next and Print Separator
;
ndir4:
	lxi	b,8	;skip over password
	dad	b
;
; Print Separator
;
ndir5:
	call	print	;print separator
	db	'    ',0
	pop	b	;get counters
;
; New Line Counter
;
	inr	c	;increment entry counter
	mov	a,c	;check for done
	ani	3	;every 4
	cz	crlf	;new line
	jmp	ndir2
;
; Print 8-char name (directory or password) and advance ptr
;
prname:
	mvi	b,8	;print name
prn1:
	mov	a,m	;get char
	call	cout
	inx	h	;pt to next
	dcr	b	;count down
	jnz	prn1
	ret
;
; Print Invalid Option and then Help Messages
;
invopt:
	call	print
	db	cr,lf,'Invalid Option',cr,lf,0	;fall thru to PRHELP
;
; Print Help Message
;
prhelp:
	call	print
	db	cr,lf,'PWD - Print Working Directories',cr,lf
	db	cr,lf,'PWD Syntax:'
	db	cr,lf,'	PWD or PWD P'
	db	cr,lf
	db	cr,lf,'where just "PWD" prints the names of the directories'
	db	cr,lf,'and "PWD P" (for PWD PASSWORD) prints the names and'
	db	cr,lf,'passwords of the directories if the user has Wheel'
	db	cr,lf,'Powers',0
	ret

	end