# $Id$
# $MirOS: src/bin/mksh/dot.mkshrc,v 1.100 2015/07/10 19:36:33 tg Exp $
#-
# Copyright (c) 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010,
#		2011, 2012, 2013, 2014, 2015
#	Thorsten Glaser <tg@mirbsd.org>
#
# Provided that these terms and disclaimer and all copyright notices
# are retained or reproduced in an accompanying document, permission
# is granted to deal in this work without restriction, including un-
# limited rights to use, publicly perform, distribute, sell, modify,
# merge, give away, or sublicence.
#
# This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
# the utmost extent permitted by applicable law, neither express nor
# implied; without malicious intent or gross negligence. In no event
# may a licensor, author or contributor be held liable for indirect,
# direct, other damage, loss, or other issues arising in any way out
# of dealing in the work, even if advised of the possibility of such
# damage or existence of a defect, except proven that it results out
# of said person's immediate fault when using the work as intended.
#-
# ${ENV:-~/.mkshrc}: mksh initialisation file for interactive shells

# catch non-mksh (including lksh) trying to run this file
case ${KSH_VERSION:-} in
*MIRBSD\ KSH*) ;;
*) return 0 ;;
esac

PS1='#'; (( USER_ID )) && PS1='$'; \: "${TERM:=vt100}${HOSTNAME:=$(\ulimit -c \
    0; hostname 2>/dev/null)}${EDITOR:=/bin/ed}${USER:=$(\ulimit -c 0; id -un \
    2>/dev/null || \echo \?)}${MKSH:=$(\builtin whence -p mksh)}"
HOSTNAME=${HOSTNAME%%*([	 ]).*}; HOSTNAME=${HOSTNAME##*([	 ])}
[[ $HOSTNAME = ?(ip6-)localhost?(6) ]] && HOSTNAME=
\: "${HOSTNAME:=nil}${MKSH:=/bin/mksh}"; \export EDITOR HOSTNAME MKSH TERM USER
PS4='[$EPOCHREALTIME] '; PS1=$'\001\r''${|
	\typeset e=$?

	(( e )) && REPLY+="$e|"
	REPLY+=${USER}@${HOSTNAME%%.*}:

	\typeset d=${PWD:-?} p=~; [[ $p = ?(*/) ]] || d=${d/#$p/~}
	\typeset m=${%d} n p=...; (( m > 0 )) || m=${#d}
	(( m > (n = (COLUMNS/3 < 7 ? 7 : COLUMNS/3)) )) && d=${d:(-n)} || p=
	REPLY+=$p$d

	\return $e
} '"$PS1 "
\alias ls=ls
\unalias ls
\alias l='ls -F'
\alias la='l -a'
\alias ll='l -l'
\alias lo='l -alo'
\alias doch='sudo mksh -c "$(\builtin fc -ln -1)"'
\command -v rot13 >/dev/null || \alias rot13='tr \
    abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ \
    nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM'
if \command -v hd >/dev/null; then \:; elif \command -v hexdump >/dev/null; then
	function hd {
		hexdump -e '"%08.8_ax  " 8/1 "%02X " " - " 8/1 "%02X "' \
		    -e '"  |" "%_p"' -e '"|\n"' "$@"
	}
else
	function hd {
		\typeset -Uui16 -Z11 pos=0
		\typeset -Uui16 -Z5 hv=2147483647
		\typeset dasc line i
		\set +U

		\cat "$@" | if \read -arN -1 line; then
			\typeset -i1 'line[*]'
			i=0
			while (( i < ${#line[*]} )); do
				hv=${line[i++]}
				if (( (pos & 15) == 0 )); then
					(( pos )) && \
					    \builtin print -r -- "$dasc|"
					\builtin print -n "${pos#16#}  "
					dasc=' |'
				fi
				\builtin print -n "${hv#16#} "
				#XXX EBCDIC, but we need [[:print:]] to fix this
				if (( (hv < 32) || (hv > 126) )); then
					dasc+=.
				else
					dasc+=${line[i-1]#1#}
				fi
				(( (pos++ & 15) == 7 )) && \
				    \builtin print -n -- '- '
			done
			while (( pos & 15 )); do
				\builtin print -n '   '
				(( (pos++ & 15) == 7 )) && \
				    \builtin print -n -- '- '
			done
			(( hv == 2147483647 )) || \builtin print -r -- "$dasc|"
		fi
	}
fi

# Berkeley C shell compatible dirs, popd, and pushd functions
# Z shell compatible chpwd() hook, used to update DIRSTACK[0]
DIRSTACKBASE=$(\builtin realpath ~/. 2>/dev/null || \
    \builtin print -nr -- "${HOME:-/}")
set -A DIRSTACK
function chpwd {
	DIRSTACK[0]=$(\builtin realpath . 2>/dev/null || \
	    \builtin print -r -- "$PWD")
	[[ $DIRSTACKBASE = ?(*/) ]] || \
	    DIRSTACK[0]=${DIRSTACK[0]/#$DIRSTACKBASE/~}
	\:
}
\chpwd .
cd() {
	\builtin cd "$@" || \return $?
	\chpwd "$@"
}
function cd_csh {
	\typeset d t=${1/#~/$DIRSTACKBASE}

	if ! d=$(\builtin cd "$t" 2>&1); then
		\builtin print -u2 "${1}: ${d##*cd: $t: }."
		\return 1
	fi
	\cd "$t"
}
function dirs {
	\typeset d dwidth
	\typeset -i fl=0 fv=0 fn=0 cpos=0

	while \getopts ":lvn" d; do
		case $d {
		(l)	fl=1 ;;
		(v)	fv=1 ;;
		(n)	fn=1 ;;
		(*)	\builtin print -u2 'Usage: dirs [-lvn].'
			\return 1 ;;
		}
	done
	\shift $((OPTIND - 1))
	if (( $# > 0 )); then
		\builtin print -u2 'Usage: dirs [-lvn].'
		\return 1
	fi
	if (( fv )); then
		fv=0
		while (( fv < ${#DIRSTACK[*]} )); do
			d=${DIRSTACK[fv]}
			(( fl )) && d=${d/#~/$DIRSTACKBASE}
			\builtin print -r -- "$fv	$d"
			\builtin let fv++
		done
	else
		fv=0
		while (( fv < ${#DIRSTACK[*]} )); do
			d=${DIRSTACK[fv]}
			(( fl )) && d=${d/#~/$DIRSTACKBASE}
			(( dwidth = (${%d} > 0 ? ${%d} : ${#d}) ))
			if (( fn && (cpos += dwidth + 1) >= 79 && \
			    dwidth < 80 )); then
				\builtin print
				(( cpos = dwidth + 1 ))
			fi
			\builtin print -nr -- "$d "
			\builtin let fv++
		done
		\builtin print
	fi
	\return 0
}
function popd {
	\typeset d fa
	\typeset -i n=1

	while \getopts ":0123456789lvn" d; do
		case $d {
		(l|v|n)	fa+=" -$d" ;;
		(+*)	n=2
			\break ;;
		(*)	\builtin print -u2 'Usage: popd [-lvn] [+<n>].'
			\return 1 ;;
		}
	done
	\shift $((OPTIND - n))
	n=0
	if (( $# > 1 )); then
		\builtin print -u2 popd: Too many arguments.
		\return 1
	elif [[ $1 = ++([0-9]) && $1 != +0 ]]; then
		if (( (n = ${1#+}) >= ${#DIRSTACK[*]} )); then
			\builtin print -u2 popd: Directory stack not that deep.
			\return 1
		fi
	elif [[ -n $1 ]]; then
		\builtin print -u2 popd: Bad directory.
		\return 1
	fi
	if (( ${#DIRSTACK[*]} < 2 )); then
		\builtin print -u2 popd: Directory stack empty.
		\return 1
	fi
	\unset DIRSTACK[n]
	\set -A DIRSTACK -- "${DIRSTACK[@]}"
	\cd_csh "${DIRSTACK[0]}" || \return 1
	\dirs $fa
}
function pushd {
	\typeset d fa
	\typeset -i n=1

	while \getopts ":0123456789lvn" d; do
		case $d {
		(l|v|n)	fa+=" -$d" ;;
		(+*)	n=2
			\break ;;
		(*)	\builtin print -u2 'Usage: pushd [-lvn] [<dir>|+<n>].'
			\return 1 ;;
		}
	done
	\shift $((OPTIND - n))
	if (( $# == 0 )); then
		if (( ${#DIRSTACK[*]} < 2 )); then
			\builtin print -u2 pushd: No other directory.
			\return 1
		fi
		d=${DIRSTACK[1]}
		DIRSTACK[1]=${DIRSTACK[0]}
		\cd_csh "$d" || \return 1
	elif (( $# > 1 )); then
		\builtin print -u2 pushd: Too many arguments.
		\return 1
	elif [[ $1 = ++([0-9]) && $1 != +0 ]]; then
		if (( (n = ${1#+}) >= ${#DIRSTACK[*]} )); then
			\builtin print -u2 pushd: Directory stack not that deep.
			\return 1
		fi
		while (( n-- )); do
			d=${DIRSTACK[0]}
			\unset DIRSTACK[0]
			\set -A DIRSTACK -- "${DIRSTACK[@]}" "$d"
		done
		\cd_csh "${DIRSTACK[0]}" || \return 1
	else
		\set -A DIRSTACK -- placeholder "${DIRSTACK[@]}"
		\cd_csh "$1" || \return 1
	fi
	\dirs $fa
}

# pager (not control character safe)
function smores {
	(
		\set +m
		\cat "$@" |&
		\trap "rv=\$?; 'kill' $! >/dev/null 2>&1; 'exit' \$rv" EXIT
		while IFS= \read -pr line; do
			llen=${%line}
			(( llen == -1 )) && llen=${#line}
			(( llen = llen ? (llen + COLUMNS - 1) / COLUMNS : 1 ))
			if (( (curlin += llen) >= LINES )); then
				\builtin print -n -- '\e[7m--more--\e[0m'
				\read -u1 || \exit $?
				[[ $REPLY = [Qq]* ]] && \exit 0
				curlin=$llen
			fi
			\builtin print -r -- "$line"
		done
	)
}

# base64 encoder and decoder, RFC compliant, NUL safe, not EBCDIC safe
function Lb64decode {
	\set +U
	\typeset c s="$*" t
	[[ -n $s ]] || { s=$(\cat; \builtin print x); s=${s%x}; }
	\typeset -i i=0 j=0 n=${#s} p=0 v x
	\typeset -i16 o

	while (( i < n )); do
		c=${s:(i++):1}
		case $c {
		(=)	\break ;;
		([A-Z])	(( v = 1#$c - 65 )) ;;
		([a-z])	(( v = 1#$c - 71 )) ;;
		([0-9])	(( v = 1#$c + 4 )) ;;
		(+)	v=62 ;;
		(/)	v=63 ;;
		(*)	\continue ;;
		}
		(( x = (x << 6) | v ))
		case $((p++)) {
		(0)	\continue ;;
		(1)	(( o = (x >> 4) & 255 )) ;;
		(2)	(( o = (x >> 2) & 255 )) ;;
		(3)	(( o = x & 255 ))
			p=0
			;;
		}
		t+=\\x${o#16#}
		(( ++j & 4095 )) && \continue
		\builtin print -n $t
		t=
	done
	\builtin print -n $t
}

\set -A Lb64encode_tbl -- A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \
    a b c d e f g h i j k l m n o p q r s t u v w x y z 0 1 2 3 4 5 6 7 8 9 + /
function Lb64encode {
	\set +U
	\typeset c s t
	if (( $# )); then
		\read -raN-1 s <<<"$*"
		\unset s[${#s[*]}-1]
	else
		\read -raN-1 s
	fi
	\typeset -i i=0 n=${#s[*]} j v

	while (( i < n )); do
		(( v = s[i++] << 16 ))
		(( j = i < n ? s[i++] : 0 ))
		(( v |= j << 8 ))
		(( j = i < n ? s[i++] : 0 ))
		(( v |= j ))
		t+=${Lb64encode_tbl[v >> 18]}${Lb64encode_tbl[v >> 12 & 63]}
		c=${Lb64encode_tbl[v >> 6 & 63]}
		if (( i <= n )); then
			t+=$c${Lb64encode_tbl[v & 63]}
		elif (( i == n + 1 )); then
			t+=$c=
		else
			t+===
		fi
		if (( ${#t} == 76 || i >= n )); then
			\builtin print $t
			t=
		fi
	done
}

# Better Avalanche for the Jenkins Hash
\typeset -Z11 -Uui16 Lbafh_v
function Lbafh_init {
	Lbafh_v=0
}
function Lbafh_add {
	\set +U
	\typeset s
	if (( $# )); then
		\read -raN-1 s <<<"$*"
		\unset s[${#s[*]}-1]
	else
		\read -raN-1 s
	fi
	\typeset -i i=0 n=${#s[*]}

	while (( i < n )); do
		((# Lbafh_v = (Lbafh_v + s[i++] + 1) * 1025 ))
		((# Lbafh_v ^= Lbafh_v >> 6 ))
	done
}
function Lbafh_finish {
	\typeset -Ui t

	((# t = (((Lbafh_v >> 7) & 0x01010101) * 0x1B) ^ \
	    ((Lbafh_v << 1) & 0xFEFEFEFE) ))
	((# Lbafh_v = t ^ (t >>> 8) ^ (Lbafh_v >>> 8) ^ \
	    (Lbafh_v >>> 16) ^ (Lbafh_v >>> 24) ))
	\:
}

# strip comments (and leading/trailing whitespace if IFS is set) from
# any file(s) given as argument, or stdin if none, and spew to stdout
function Lstripcom {
	\set -o noglob
	\cat "$@" | while \read _line; do
		_line=${_line%%#*}
		[[ -n $_line ]] && \builtin print -r -- $_line
	done
}

# give MidnightBSD's laffer1 a bit of csh feeling
function setenv {
	\eval "'export' \"$1\""'="$2"'
}

# toggle built-in aliases and utilities, and aliases and functions from mkshrc
function enable {
	\typeset doprnt=0 mode=1 x y z rv=0
	\typeset b_alias i_alias i_func nalias=0 nfunc=0 i_all
	\set -A b_alias
	\set -A i_alias
	\set -A i_func

	# accumulate mksh built-in aliases, in ASCIIbetical order
	i_alias[nalias]=autoload; b_alias[nalias++]='\typeset -fu'
	i_alias[nalias]=functions; b_alias[nalias++]='\typeset -f'
	i_alias[nalias]=hash; b_alias[nalias++]='\builtin alias -t'
	i_alias[nalias]=history; b_alias[nalias++]='\builtin fc -l'
	i_alias[nalias]=integer; b_alias[nalias++]='\typeset -i'
	i_alias[nalias]=local; b_alias[nalias++]='\typeset'
	i_alias[nalias]=login; b_alias[nalias++]='\exec login'
	i_alias[nalias]=nameref; b_alias[nalias++]='\typeset -n'
	i_alias[nalias]=nohup; b_alias[nalias++]='nohup '
	i_alias[nalias]=r; b_alias[nalias++]='\builtin fc -e -'
	#XXX OS/2
	i_alias[nalias]=source; b_alias[nalias++]='PATH=$PATH:. \command .'
	i_alias[nalias]=stop; b_alias[nalias++]='\kill -STOP'
	i_alias[nalias]=type; b_alias[nalias++]='\builtin whence -v'

	# accumulate mksh built-in utilities, in definition order, even ifndef
	i_func[nfunc++]=.
	i_func[nfunc++]=:
	i_func[nfunc++]='['
	i_func[nfunc++]=alias
	i_func[nfunc++]=break
	i_func[nfunc++]=builtin
	i_func[nfunc++]=cat
	i_func[nfunc++]=cd
	i_func[nfunc++]=chdir
	i_func[nfunc++]=command
	i_func[nfunc++]=continue
	i_func[nfunc++]=echo
	i_func[nfunc++]=eval
	i_func[nfunc++]=exec
	i_func[nfunc++]=exit
	i_func[nfunc++]=export
	i_func[nfunc++]=false
	i_func[nfunc++]=fc
	i_func[nfunc++]=getopts
	i_func[nfunc++]=global
	i_func[nfunc++]=jobs
	i_func[nfunc++]=kill
	i_func[nfunc++]=let
	i_func[nfunc++]='let]'
	i_func[nfunc++]=print
	i_func[nfunc++]=pwd
	i_func[nfunc++]=read
	i_func[nfunc++]=readonly
	i_func[nfunc++]=realpath
	i_func[nfunc++]=rename
	i_func[nfunc++]=return
	i_func[nfunc++]=set
	i_func[nfunc++]=shift
	i_func[nfunc++]=suspend
	i_func[nfunc++]=test
	i_func[nfunc++]=times
	i_func[nfunc++]=trap
	i_func[nfunc++]=true
	i_func[nfunc++]=typeset
	i_func[nfunc++]=ulimit
	i_func[nfunc++]=umask
	i_func[nfunc++]=unalias
	i_func[nfunc++]=unset
	i_func[nfunc++]=wait
	i_func[nfunc++]=whence
	i_func[nfunc++]=bg
	i_func[nfunc++]=fg
	i_func[nfunc++]=bind
	i_func[nfunc++]=mknod
	i_func[nfunc++]=printf
	i_func[nfunc++]=sleep
	i_func[nfunc++]=domainname

	# accumulate aliases from dot.mkshrc, in definition order
	i_alias[nalias]=l; b_alias[nalias++]='ls -F'
	i_alias[nalias]=la; b_alias[nalias++]='l -a'
	i_alias[nalias]=ll; b_alias[nalias++]='l -l'
	i_alias[nalias]=lo; b_alias[nalias++]='l -alo'
	i_alias[nalias]=doch; b_alias[nalias++]='sudo mksh -c "$(\builtin fc -ln -1)"'
	i_alias[nalias]=rot13; b_alias[nalias++]='tr abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM'
	i_alias[nalias]=cls; b_alias[nalias++]='\builtin print -n \\ec'

	# accumulate functions from dot.mkshrc, in definition order
	i_func[nfunc++]=hd
	i_func[nfunc++]=chpwd
	i_func[nfunc++]=cd_csh
	i_func[nfunc++]=dirs
	i_func[nfunc++]=popd
	i_func[nfunc++]=pushd
	i_func[nfunc++]=smores
	i_func[nfunc++]=Lb64decode
	i_func[nfunc++]=Lb64encode
	i_func[nfunc++]=Lbafh_init
	i_func[nfunc++]=Lbafh_add
	i_func[nfunc++]=Lbafh_finish
	i_func[nfunc++]=Lstripcom
	i_func[nfunc++]=setenv
	i_func[nfunc++]=enable

	# collect all identifiers, sorted ASCIIbetically
	\set -sA i_all -- "${i_alias[@]}" "${i_func[@]}"

	# handle options, we don't do dynamic loading
	while \getopts "adf:nps" x; do
		case $x {
		(a)
			mode=-1
			;;
		(d)
			# deliberately causing an error, like bash-static
			;|
		(f)
			\builtin print -u2 enable: dynamic loading not available
			\return 2
			;;
		(n)
			mode=0
			;;
		(p)
			doprnt=1
			;;
		(s)
			\set -sA i_all -- . : break continue eval exec exit \
			    export readonly return set shift times trap unset
			;;
		(*)
			\builtin print -u2 enable: usage: \
			    "enable [-adnps] [-f filename] [name ...]"
			return 2
			;;
		}
	done
	\shift $((OPTIND - 1))

	# display builtins enabled/disabled/all/special?
	if (( doprnt || ($# == 0) )); then
		for x in "${i_all[@]}"; do
			y=$(\alias "$x") || y=
			[[ $y = "$x='\\builtin whence -p $x >/dev/null || (\\builtin print mksh: $x: not found; exit 127) && \$(\\builtin whence -p $x)'" ]]; z=$?
			case $mode:$z {
			(-1:0|0:0)
				\print -r -- "enable -n $x"
				;;
			(-1:1|1:1)
				\print -r -- "enable $x"
				;;
			}
		done
		\return 0
	fi

	for x in "$@"; do
		z=0
		for y in "${i_alias[@]}" "${i_func[@]}"; do
			[[ $x = "$y" ]] || \continue
			z=1
			\break
		done
		if (( !z )); then
			\builtin print -ru2 enable: "$x": not a shell builtin
			rv=1
			\continue
		fi
		if (( !mode )); then
			# disable this
			\alias "$x=\\builtin whence -p $x >/dev/null || (\\builtin print mksh: $x: not found; exit 127) && \$(\\builtin whence -p $x)"
		else
			# find out if this is an alias or not, first
			z=0
			y=-1
			while (( ++y < nalias )); do
				[[ $x = "${i_alias[y]}" ]] || \continue
				z=1
				\break
			done
			if (( z )); then
				# re-enable the original alias body
				\alias "$x=${b_alias[y]}"
			else
				# re-enable the original utility/function
				\unalias "$x"
			fi
		fi
	done
	\return $rv
}

\: place customisations below this line

for p in ~/.etc/bin ~/bin; do
	[[ -d $p/. ]] || \continue
	#XXX OS/2
	[[ :$PATH: = *:$p:* ]] || PATH=$p:$PATH
done

\export SHELL=$MKSH MANWIDTH=80 LESSHISTFILE=-
\alias cls='\builtin print -n \\ec'

#\unset LANGUAGE LC_ADDRESS LC_ALL LC_COLLATE LC_IDENTIFICATION LC_MONETARY \
#    LC_NAME LC_NUMERIC LC_TELEPHONE LC_TIME
#p=en_GB.UTF-8
#\set -U
#\export LANG=C LC_CTYPE=$p LC_MEASUREMENT=$p LC_MESSAGES=$p LC_PAPER=$p

\unset p

\: place customisations above this line