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xivid_notes.txt
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xivid_notes.txt
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--------------------------------
Xivid notities
--------------------------------
[Reeksen en positionering]
$ xidel -se 'join(1 to 10)'
$ xidel -se 'join(for $x in 1 to 10 return $x)'
1 2 3 4 5 6 7 8 9 10
$ xidel -se 'join((1 to 10) ! .[. mod 2 eq 1])'
$ xidel -s --xquery 'join(for $x in 1 to 10 where $x mod 2 eq 1 return $x)
1 3 5 7 9
$ xidel -se 'join((1 to 10) ! .[. mod 2 eq 0])'
$ xidel -s --xquery 'join(for $x in 1 to 10 where $x mod 2 eq 0 return $x)'
2 4 6 8 10
$ xidel -se 'join((65 to 74) ! codepoints-to-string(.))'
$ xidel -se 'join((65 to 74) ! x:cps(.))'
$ xidel -se 'join(for $x in 65 to 74 return x:cps($x))'
A B C D E F G H I J
------------------------------------------------------------------------------------------------
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join($a)'
A B C D E F G H I J
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return $a[1]'
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return head($a)'
A
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return $a[10]'
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return $a[last()]'
J
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join(tail($a))'
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join($a[position() gt 1])'
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join(subsequence($a,2))'
B C D E F G H I J
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join($a[position() lt last()])'
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join($a[position() lt 10])'
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join(subsequence($a,1,count($a) - 1))'
A B C D E F G H I
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join($a[position() ne 5])'
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join(remove($a,5))'
A B C D F G H I J
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join($a[position() gt 3][position() lt 5])'
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join($a[position() = 4 to 7])'
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join(subsequence($a,4,4))'
D E F G
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join($a[position() mod 2 eq 1])'
A C E G I
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join($a[position() mod 2 eq 0])'
B D F H J
$ xidel -se 'let $a:=(65 to 74) ! x:cps(.) return join(reverse($a))'
J I H G F E D C B A
$ xidel -se 'let $a:=1 to 10 return (join($a),join($a ! x:cps(. + 64)),join(reverse($a)),join(reverse($a) ! x:cps(. + 64)))'
1 2 3 4 5 6 7 8 9 10
A B C D E F G H I J
10 9 8 7 6 5 4 3 2 1
J I H G F E D C B A
================================================================================================
[JSON filtering and selection]
$ xidel -se '
let $a:={"a":1,"b":2} return (
{"foo":{"bar":$a/c}},
{"foo":{"bar":$a/c}[bar]},
{"foo":{"bar1"?:$a/a,"bar2"?:$a/b,"bar3"?:$a/c}},
{"foo":{"bar1"?:$a/a,"bar2"?:$a/c}},
{"foo":{"bar"?:$a/c}},
{"foo":array{{"bar":$a/a},{"bar":$a/b},{"bar":$a/c}[bar]}},
{"foo":array{{"bar":$a/a},{"bar":$a/c}[bar]}},
{"foo":array{{"bar":$a/c}[bar]}},
{"foo":({"bar":$a/a},{"bar":$a/b},{"bar":$a/c}[bar])},
{"foo":({"bar":$a/a},{"bar":$a/c}[bar])},
{"foo":({"bar":$a/c}[bar])},
{"foo":({"bar":$a/a},{"bar":$a/b},{"bar":$a/c}[bar]) ! [.]},
{"foo":({"bar":$a/a},{"bar":$a/c}[bar]) ! [.]},
{"foo":({"bar":$a/c}[bar]) ! [.]},
{"foo":let $b:=({"bar":$a/a},{"bar":$a/b},{"bar":$a/c}[bar]) return array{$b}},
{"foo":let $b:=({"bar":$a/a},{"bar":$a/c}[bar]) return array{$b}},
{"foo":let $b:=({"bar":$a/c}[bar]) return array{$b}},
{"foo":let $b:=({"bar":$a/a},{"bar":$a/b},{"bar":$a/c}[bar]) return array{$b}[exists($b)]},
{"foo":let $b:=({"bar":$a/a},{"bar":$a/c}[bar]) return array{$b}[exists($b)]},
{"foo":let $b:=({"bar":$a/c}[bar]) return array{$b}[exists($b)]}
)
' --printed-json-format=compact
{"foo": {"bar": null}}
{"foo": null} # [bar] evalueert naar null, waardoor het hele object verdwijnt.
{"foo": {"bar1": 1, "bar2": 2}} # ? is "optional pair".
{"foo": {"bar1": 1}}
{"foo": {}} # Geen attribute-value-pair? Dan krijg je een leeg object.
{"foo": [{"bar": 1}, {"bar": 2}]}
{"foo": [{"bar": 1}]}
{"foo": []} # Met blokhaken krijg je zonder één object een lege array.
{"foo": [{"bar": 1}, {"bar": 2}]} # Met haakjes evalueert de reeks automatisch tot array.
{"foo": {"bar": 1}} # De reeks, uiteindelijk één object, blijft ook een object.
{"foo": null}
{"foo": [[{"bar": 1}], [{"bar": 2}]]} # Elk object van de reeks wordt een array en dit evalueert tot weer een array.
{"foo": [{"bar": 1}]}
{"foo": null}
{"foo": [{"bar": 1}, {"bar": 2}]} # De hele reeks wordt een array.
{"foo": [{"bar": 1}]}
{"foo": []} # Zonder te controleren of $b minimaal één object heeft krijg je weer een lege array.
{"foo": [{"bar": 1}, {"bar": 2}]}
{"foo": [{"bar": 1}]}
{"foo": null} # De enige manier voor de eis "Eén of meerdere objecten? Array. Nul objecten? null.
------------------------------------------------------------------------------------------------
$ xidel -se '
let $a:={"a":1,"b":2},
$b:={"a":"x","b":"y"}
return (
{"foo":$a[b]/{"bar":b}},
{"foo":$a[exists(b)]/{"bar":b}},
{"foo":$b[b]/{"bar":b}},
{"foo":$b[exists(b)]/{"bar":b}},
{"foo":$a[c]/{"bar":c}},
{"foo":$b[c]/{"bar":c}}
)
' --printed-json-format=compact
{"foo": null} # $a[b] evalueert naar $a[2], maar er is geen 2e object, dus krijg je null.
{"foo": {"bar": 2}} # Als de waarde van het attribuut dat je checkt een integer is, dan is exists() vereist.
{"foo": {"bar": "y"}} # $b/b is een string en dus is exists() niet vereist.
{"foo": {"bar": "y"}}
{"foo": null}
{"foo": null}
------------------------------------------------------------------------------------------------
$ echo '{"a":null}' | xidel - -se '
$json/join((exists(a),a)),
jn:parse-json($raw)/join((exists(a),a)),
parse-json($raw)/join((exists(a),a))
'
false
true null
false
$ echo '{"a":null}' | xidel --json-mode=deprecated - -se '
$json/join((exists(a),a)),
jn:parse-json($raw)/join((exists(a),a)),
parse-json($raw)/join((exists(a),a))
'
true null
true null
false
$ echo '{"a":null,"b":"foo"}' | xidel - -se '$json/concat((a,b),"bar")'
$ echo '{"a":null,"b":"foo"}' | xidel - -se 'parse-json($raw)/concat((a,b),"bar")'
$ echo '{"a":null,"b":"foo"}' | xidel - -se 'jn:parse-json($raw)/concat((a,b)[.],"bar")'
$ echo '{"a":null,"b":"foo"}' | xidel --json-mode=deprecated - -se '$json/concat((a,b)[.],"bar")'
$ echo '{"a":null,"b":"foo"}' | xidel --json-mode=deprecated - -se 'parse-json($raw)/concat((a,b),"bar")'
foobar
$ echo '{"a":null,"b":"foo"}' | xidel --json-mode=deprecated - -se '$json/concat((a,b),"bar")'
$ echo '{"a":null,"b":"foo"}' | xidel - -se 'jn:parse-json($raw)/concat((a,b),"bar")'
Error:
err:XPTY0004: Invalid conversion from (null, "foo") to type singleton
------------------------------------------------------------------------------------------------
$ xidel -se 'let $a:={"a":1,"b":{"c":2}} return $a[b]/b' --printed-json-format=compact # xidel-0.9.9-7580-9cac3c1
{"c": 2}
$ xidel -se 'let $a:={"a":1,"b":{"c":2}} return $a[b]/b' --printed-json-format=compact # xidel-0.9.9-7622-1650cd0
Error:
err:FORG0006: Object cannot be used as boolean:
{"c": 2}
$ xidel -se 'let $a:={"a":1,"b":{"c":2}} return $a[exists(b)]/b' --printed-json-format=compact # xidel-0.9.9-7622-1650cd0
{"c": 2}
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
$ xidel -se 'let $a:=array{{"a":1},{"b":2}} return if ($a(2)) then $a(2) else ()' --printed-json-format=compact # xidel-0.9.9-7580-9cac3c1
{"b": 2}
$ xidel -se 'let $a:=array{{"a":1},{"b":2}} return if ($a(2)) then $a(2) else ()' --printed-json-format=compact # xidel-0.9.9-7622-1650cd0
Error:
err:FORG0006: Object cannot be used as boolean:
{"b": 2}
$ xidel -se 'let $a:=array{{"a":1},{"b":2}} return if (exists($a(2))) then $a(2) else ()' --printed-json-format=compact # xidel-0.9.9-7622-1650cd0
{"b": 2}
================================================================================================
[Base conversions]
Decimal (Base 10) 31 = (3*10^1)+(1*10^0) = 30+1 = 31
Binary (Base 2) 11111 = (1*2^4)+(1*2^3)+(1*2^2)+(1*2^1)+(1*2^0) = 16+8+4+2+1 = 31
Hexadecimal (Base 16) 1F = (1*16^1)+(15*16^0) = 16+15 = 31
Dec to Bin/Hex:
$ xidel -se 'x:integer-to-base(31,2)'
11111
$ xidel -se 'x:integer-to-base(31,16)'
1F
Bin/Hex to Dec:
$ xidel -se 'x:integer("11111",2)'
$ xidel -se 'x:integer("0b11111")'
31
$ xidel -se 'x:integer("1F",16)'
$ xidel -se 'x:integer("0x1F")'
31
Bin to Hex:
$ xidel -se 'x:integer-to-base(x:integer("11111",2),16)'
$ xidel -se 'x:integer-to-base(x:integer("0b11111"),16)'
1F
Hex to Bin:
$ xidel -se 'x:integer-to-base(x:integer("1F",16),2)'
$ xidel -se 'x:integer-to-base(x:integer("0x1F"),2)'
11111
------------------------------------------------------------------------------------------------
Unsigned (32bit) Hex to Dec:
xidel -se "x:integer('0xffffff88')"
4294967176
Signed (32bit) Hex to Dec:
https://www.digital-detective.net/manual-identification-of-suspect-computer-time-zone-2/
http://core.ecu.edu/csci/wirthj/Basen/signBin-c.html
https://stackoverflow.com/q/5826818
https://stackoverflow.com/q/33629416
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Check of de hoeveelheid bits groter is dan 31:
- Tel het aantal bits.
$ xidel -se 'x:integer-to-base(x:integer("0xffffff88"),2)'
11111111111111111111111110001000
$ xidel -se 'string-length(x:integer-to-base(x:integer("0xffffff88"),2))'
32
- Converteer als unsigned 32bit Hex en trek daar 2^(aantal bits) van af.
$ xidel -se 'math:pow(2,string-length(x:integer-to-base(x:integer("0xffffff88"),2)))'
4.294967296E9
$ xidel -se 'integer(math:pow(2,string-length(x:integer-to-base(x:integer("0xffffff88"),2))))'
4294967296
$ xidel -se 'let $a:=x:integer("0xffffff88") return $a - integer(math:pow(2,string-length(x:integer-to-base($a,2))))'
-120
- Dit geldt alleen voor 0x80000000 en hoger. Converteer 0x7fffffff en lager als unsigned 32bit Hex!
$ xidel -se 'x:integer-to-base(x:integer("0x80000000"),2)'
10000000000000000000000000000000
$ xidel -se 'x:integer-to-base(x:integer("0x7fffffff"),2)'
1111111111111111111111111111111
$ xidel -se 'let $a:=x:integer("0x80000000"),$b:=x:integer-to-base($a,2) return if (string-length($b) gt 31) then $a - integer(math:pow(2,string-length($b))) else $a'
-2147483648
$ xidel -se 'let $a:=x:integer("0x7fffffff"),$b:=x:integer-to-base($a,2) return if (string-length($b) gt 31) then $a - integer(math:pow(2,string-length($b))) else $a'
2147483647 # 2^31
$ xidel -se 'let $a:=x:integer("0xffffff88"),$b:=x:integer-to-base($a,2) return if (string-length($b) gt 31) then $a - integer(math:pow(2,string-length($b))) else $a'
-120
$ time xidel -se 'declare function local:shex-to-dec($shex as string) as integer {let $a:=x:integer($shex),$b:=x:integer-to-base($a,2) return if (string-length($b) gt 31) then $a - integer(math:pow(2,string-length($b))) else $a}; ((1 to 100000) ! local:shex-to-dec("0xffffff88"))[1]'
-120
real 0m30.359s
user 0m0.015s
sys 0m0.015s
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Check of de decimale waarde groter is dan 2^31:
- Tel het aantal bits.
$ xidel -se '(string-length("0xffffff88") - 2) * 4'
$ xidel -se 'string-length("ffffff88") * 4'
32
x4, want F_16 is 1111_2 (4 bits):
$ xidel -se 'x:integer-to-base(x:integer("0xf"),2)'
1111
- Converteer als unsigned 32bit Hex en trek daar 2^(aantal bits) van af.
$ xidel -se 'math:pow(2,(string-length("0xffffff88") - 2) * 4)'
4.294967296E9
$ xidel -se 'integer(math:pow(2,(string-length("0xffffff88") - 2) * 4))'
4294967296
$ xidel -se 'x:integer("0xffffff88") - integer(math:pow(2,(string-length("0xffffff88") - 2) * 4))'
-120
- Dit geldt alleen voor 0x80000000 en hoger. Converteer 0x7fffffff en lager als unsigned 32bit Hex!
$ xidel -se 'x:integer("0x80000000")'
2147483648
$ xidel -se 'integer(math:pow(2,(string-length("0x80000000") - 2) * 4 - 1))'
2147483648 # 2^31
$ xidel -se 'integer(math:pow(2,(string-length("0x80000000") - 2) * 4)) div 2'
2147483648
$ xidel -se 'let $a:=x:integer("0x80000000"),$b:=integer(math:pow(2,(string-length("0x80000000") - 2) * 4)) return if ($a gt $b div 2) then $a - $b else $a'
-2147483648
$ xidel -se 'let $a:=x:integer("0x7fffffff"),$b:=integer(math:pow(2,(string-length("0x7fffffff") - 2) * 4)) return if ($a gt $b div 2) then $a - $b else $a'
2147483647
$ xidel -se 'let $a:=x:integer("0xffffff88"),$b:=integer(math:pow(2,(string-length("0xffffff88") - 2) * 4)) return if ($a gt $b div 2) then $a - $b else $a'
-120
$ time xidel -se 'declare function local:shex-to-dec($shex as string) as integer {let $a:=x:integer($shex),$b:=integer(math:pow(2,(string-length($shex) - 2) * 4)) return if ($a gt $b div 2) then $a - $b else $a}; ((1 to 100000) ! local:shex-to-dec("0xffffff88"))[1]'
-120
real 0m4.813s # Veel snellere methode!
user 0m0.015s
sys 0m0.015s
declare function xivid:shex-to-dec($shex as string) as integer {
let $a:=x:integer($shex),
$b:=integer(math:pow(2,(string-length($shex) - 2) * 4))
return
if ($a gt $b div 2) then
$a - $b
else
$a
};
------------------------------------------------------------------------------------------------
Genereer een willekeurig 128bit hexadecimaal getal:
$ xidel -se 'join((1 to 32))'
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
$ xidel -se 'random-seed(),join((1 to 32) ! random(16))'
8 5 3 4 15 0 13 7 15 2 7 3 13 1 10 8 6 7 11 5 5 8 9 3 11 5 5 1 10 8 0 1
$ xidel -se 'random-seed(),join((1 to 32) ! x:integer-to-base(random(16),16))'
8 5 3 4 F 0 D 7 F 2 7 3 D 1 A 8 6 7 B 5 5 8 9 3 B 5 5 1 A 8 0 1
$ xidel -se 'random-seed(),string-join((1 to 32) ! x:integer-to-base(random(16),16))'
8534F0D7F273D1A867B55893B551A801
------------------------------------------------------------------------------------------------
Base64:
https://en.wikipedia.org/wiki/Base64
$ xidel -se 'string-to-base64Binary("Xivid")'
WGl2aWQ=
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
String to Base64 (zonder string-to-base64Binary() ):
----------------------------------------------------------------
Base64 tekens:
$ xidel -se 'string-join((for $x in (65 to 90,97 to 122,48 to 57) return x:cps($x),"+","/"))'
ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/
| 65 t/m 90 || 97 t/m 122 ||48 t/m57| # Codepoints in ASCII tabel.
0 63 # 64 tekens, range: 0-63.
Principe:
X i v i d # van teken
88 105 118 105 100 # naar codepoint/decimaal
01011000 01101001 01110110 01101001 01100100 # naar binair
010110 000110 100101 110110 011010 010110 0100[00] # opdelen in groepjes van 6 bits
22 6 37 54 26 22 16 # naar decimaal/codepoint
W G l 2 a W Q = # naar base64 met eventuele padding
----------------------------------------------------------------
$ xidel -se 'join(string-to-codepoints("Xivid"))'
$ xidel -se 'join(x:cps("Xivid"))'
88 105 118 105 100
$ xidel -se 'join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2)))'
01011000 01101001 01110110 01101001 01100100
$ xidel -se 'string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2)))'
0101100001101001011101100110100101100100
Deze string moet opgedeeld worden in substrings met een lengte van 6 tekens.
$ xidel -se 'let $bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) return substring($bin,1,6)'
010110
$ xidel -se 'let $bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) return substring($bin,37,6)'
0100
Dus opdelen op de indexes 1, 7, 13, 19, 25, 31, 37.
$ xidel -se 'let $bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) return join((1 to string-length($bin)) ! .[. mod 6 eq 1])'
$ xidel -s --xquery 'let $bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) return join(for $x in 1 to string-length($bin) where $x mod 6 eq 1 return $x)'
1 7 13 19 25 31 37
$ xidel -s --xquery 'join(let $bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) for $x in 1 to string-length($bin) where $x mod 6 eq 1 return substring($bin,$x,6))'
010110 000110 100101 110110 011010 010110 0100
De binaire getallen dienen altijd 6 bits te bevatten.
$ xidel -s --xquery 'join(let $bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) for $x in 1 to string-length($bin) where $x mod 6 eq 1 let $a:=substring($bin,$x,6) return substring($a||"0000",1,6))'
010110 000110 100101 110110 011010 010110 010000
De extra nullen worden later als padding (=) toegevoegd. 00 wordt =, 0000 wordt ==.
$ xidel -s --xquery 'join(let $bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) for $x in 1 to string-length($bin) where $x mod 6 eq 1 let $a:=substring($bin,$x,6) return string-length($a))'
6 6 6 6 6 6 4
$ xidel -s --xquery 'join(let $bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) for $x in 1 to string-length($bin) where $x mod 6 eq 1 let $a:=substring($bin,$x,6) return (1 to (6 - string-length($a)[. ne 6]) div 2) ! "=")'
=
$ xidel -s --xquery 'join(let $bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) for $x in 1 to string-length($bin) where $x mod 6 eq 1 let $a:=substring($bin,$x,6) return (substring($a||"0000",1,6),(1 to (6 - string-length($a)[. ne 6]) div 2) ! "="))'
010110 000110 100101 110110 011010 010110 010000 =
$ xidel -s --xquery 'join(let $bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) for $x in 1 to string-length($bin) where $x mod 6 eq 1 let $a:=substring($bin,$x,6) return (x:integer(substring($a||"0000",1,6),2),(1 to (6 - string-length($a)[. ne 6]) div 2) ! "="))'
22 6 37 54 26 22 16 =
$ xidel -s --xquery 'join(let $base64:=(for $x in (65 to 90,97 to 122,48 to 57) return codepoints-to-string($x),"+","/"),$bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) for $x in 1 to string-length($bin) where $x mod 6 eq 1 let $a:=substring($bin,$x,6) return ($base64[x:integer(substring($a||"0000",1,6),2) + 1],(1 to (6 - string-length($a)[. ne 6]) div 2) ! "="))'
W G l 2 a W Q =
$ xidel -s --xquery 'string-join(let $base64:=(for $x in (65 to 90,97 to 122,48 to 57) return codepoints-to-string($x),"+","/"),$bin:=string-join(x:cps("Xivid") ! ("0"||x:integer-to-base(.,2))) for $x in 1 to string-length($bin) where $x mod 6 eq 1 let $a:=substring($bin,$x,6) return ($base64[x:integer(substring($a||"0000",1,6),2) + 1],(1 to (6 - string-length($a)[. ne 6]) div 2) ! "="))'
WGl2aWQ=
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Base64 to string:
$ xidel -se 'binary-to-string(base64Binary("WGl2aWQ="))'
Xivid
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
File to Base64:
$ xidel -se 'file:read-binary("nl.png")' # Nederlandse vlag van 18 bij 12 pixels.
iVBORw0KGgoAAAANSUhEUgAAABIAAAAMCAIAAADgcHrrAAAAG0lEQVQoz2P4z8BABmIYGtrIAkND21CJAjIQAF2WZqj5EZlfAAAAAElFTkSuQmCC
File to Base64 (html):
$ xidel -s --xquery 'concat("<img src="data:image/png;base64,",file:read-binary("nl.png"),"">")'
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAAMCAIAAADgcHrrAAAAG0lEQVQoz2P4z8BABmIYGtrIAkND21CJAjIQAF2WZqj5EZlfAAAAAElFTkSuQmCC">
Base64 to file:
$ xidel -se 'file:write-binary("nl.png",base64Binary("iVBORw0KGgoAAAANSUhEUgAAABIAAAAMCAIAAADgcHrrAAAAG0lEQVQoz2P4z8BABmIYGtrIAkND21CJAjIQAF2WZqj5EZlfAAAAAElFTkSuQmCC"))'
================================================================================================
[Exclusieve disjunctie (exclusive or / xor)]
Zolang Xidel de "EXPath Binary Module" (met bin:xor()) niet aan boord heeft is een zelfgemaakte functie nodig.
Zie https://github.com/benibela/xidel/issues/54.
$ echo $((33 ^ 73))
104
$ xidel -se 'let $a:=33,$b:=73 return system(x"bash -c ""printf $(({$a} ^ {$b}))""")'
104
33_10 = 0100001_2
73_10 = 1001001_2
------- XOR
104_10 = 1101000_2 # Output is alleen 1 als input 0 én 1 of 1 én 0 is.
$ xidel -se '(33,73) ! x:integer-to-base(.,2)'
100001
1001001
$ xidel -se 'let $bin:=(33,73) ! x:integer-to-base(.,2) return $bin ! string-length()'
6
7
$ xidel -se 'let $bin:=(33,73) ! x:integer-to-base(.,2) return max($bin ! string-length())'
7
$ xidel -se 'let $bin:=(33,73) ! x:integer-to-base(.,2),$len:=max($bin ! string-length()) return $bin ! concat(string-join((1 to $len - string-length()) ! 0),.)'
0100001
1001001
$ xidel -se 'let $bin:=(33,73) ! x:integer-to-base(.,2),$len:=max($bin ! string-length()),$val:=$bin ! concat(string-join((1 to $len - string-length()) ! 0),.) return string-join(for $x in 1 to $len return if (substring($val[1],$x,1) eq substring($val[2],$x,1)) then 0 else 1)'
1101000
$ xidel -se 'let $bin:=(33,73) ! x:integer-to-base(.,2),$len:=max($bin ! string-length()),$val:=$bin ! concat(string-join((1 to $len - string-length()) ! 0),.) return x:integer(string-join(for $x in 1 to $len return if (substring($val[1],$x,1) eq substring($val[2],$x,1)) then 0 else 1),2)'
104
$ xidel -se 'declare function local:bin-xor($a,$b){let $bin:=($a,$b) ! x:integer-to-base(.,2),$len:=max($bin ! string-length()),$val:=$bin ! concat(string-join((1 to $len - string-length()) ! 0),.) return x:integer(string-join(for $x in 1 to $len return if (substring($val[1],$x,1) eq substring($val[2],$x,1)) then 0 else 1),2)}; local:bin-xor(33,73)'
104
------------------------------------------------------------------------------------------------
$ time xidel -se 'declare function local:bin-xor($a,$b){let $bin:=($a,$b) ! x:integer-to-base(.,2),$len:=max($bin ! string-length()),$val:=$bin ! concat(string-join((1 to $len - string-length()) ! 0),.) return x:integer(string-join(for $x in 1 to $len return if (substring($val[1],$x,1) eq substring($val[2],$x,1)) then 0 else 1),2)}; ((1 to 100000) ! local:bin-xor(33,73))[1]'
104
real 0m25.563s
user 0m0.015s
sys 0m0.015s
$ time xidel -se 'declare function local:bin-xor($a,$b){let $bin:=($a,$b) ! x:integer-to-base(.,2),$len:=max($bin ! string-length()),$val:=$bin ! concat(string-join((1 to $len - string-length()) ! 0),.),$v1:=$val[1],$v2:=$val[2] return x:integer(string-join(for $x in 1 to $len return if (substring($v1,$x,1) eq substring($v2,$x,1)) then 0 else 1),2)}; ((1 to 100000) ! local:bin-xor(33,73))[1]'
104
real 0m23.109s
user 0m0.015s
sys 0m0.000s
let $v1:=$val[1] return substring($v1,$x,1)
...is dus iets sneller dan...
substring($val[1],$x,1)
------------------------------------------------------------------------------------------------
declare function xivid:bin-xor($a as integer,$b as integer) as integer {
let $bin:=($a,$b) ! x:integer-to-base(.,2),
$len:=max($bin ! string-length()),
$val:=$bin ! concat(
string-join((1 to $len - string-length()) ! 0),
.
),
$v1:=$val[1],
$v2:=$val[2]
return
x:integer(
string-join(
for $x in 1 to $len return
if (substring($v1,$x,1) eq substring($v2,$x,1)) then 0 else 1
),
2
)
};
================================================================================================
[Codepoints en tekensets]
https://nl.wikipedia.org/wiki/ASCII_%28tekenset%29
https://nl.wikipedia.org/wiki/ISO_8859-1
https://en.wikipedia.org/wiki/Control_character
ASCII 7bit (2^7=128), 0 t/m 127:
- 0 t/m 127 in 16 rijen van 8.
$ xidel -s --xquery '(0 to 15) ! join(for $x in 0 to 127 where $x mod 16 eq . return $x)'
$ xidel -se 'for $x in 0 to 15 return join((0 to 127)[. mod 16 eq $x])'
$ xidel -se 'for $x in 0 to 15 return join((0 to 7) ! (. * 16 + $x))'
$ xidel -se '(0 to 15) ! join(for $x in 0 to 7 return ($x * 16 + .))'
0 16 32 48 64 80 96 112
1 17 33 49 65 81 97 113
2 18 34 50 66 82 98 114
3 19 35 51 67 83 99 115
4 20 36 52 68 84 100 116
5 21 37 53 69 85 101 117
6 22 38 54 70 86 102 118
7 23 39 55 71 87 103 119
8 24 40 56 72 88 104 120
9 25 41 57 73 89 105 121
10 26 42 58 74 90 106 122
11 27 43 59 75 91 107 123
12 28 44 60 76 92 108 124
13 29 45 61 77 93 109 125
14 30 46 62 78 94 110 126
15 31 47 63 79 95 111 127
- Uitlijnen. I.p.v. if ((. eq 0) or (. eq 1) or ...) then... geeft een vergelijking met een reeks ook een boolean.
$ xidel -se 'for $x in 0 to 15 return join((0 to 127)[. mod 16 eq $x] ! (if (. = (0 to 9,96 to 99)) then " "||. else .))'
$ xidel -se 'for $x in 0 to 15 return join((0 to 7) ! (. * 16 + $x) ! (if (. = (0 to 9,96 to 99)) then " "||. else .))'
0 16 32 48 64 80 96 112
1 17 33 49 65 81 97 113
2 18 34 50 66 82 98 114
3 19 35 51 67 83 99 115
4 20 36 52 68 84 100 116
5 21 37 53 69 85 101 117
6 22 38 54 70 86 102 118
7 23 39 55 71 87 103 119
8 24 40 56 72 88 104 120
9 25 41 57 73 89 105 121
10 26 42 58 74 90 106 122
11 27 43 59 75 91 107 123
12 28 44 60 76 92 108 124
13 29 45 61 77 93 109 125
14 30 46 62 78 94 110 126
15 31 47 63 79 95 111 127
- Hexadecimale getallen erbij, met | als scheiding en een extra 0 voor 0 t/m 9.
$ xidel -se 'for $x in 0 to 15 return join((0 to 127)[. mod 16 eq $x] ! (concat(if (. = (0 to 9,96 to 99)) then " "||. else .,"|",x:integer-to-base(.,16) ! (if (string-length(.) eq 1) then "0"||. else .))))'
$ xidel -se 'for $x in 0 to 15 return join((0 to 7) ! (. * 16 + $x) ! (concat(if (. = (0 to 9,96 to 99)) then " "||. else .,"|",x:integer-to-base(.,16) ! (if (string-length(.) eq 1) then "0"||. else .))))'
0|00 16|10 32|20 48|30 64|40 80|50 96|60 112|70
1|01 17|11 33|21 49|31 65|41 81|51 97|61 113|71
2|02 18|12 34|22 50|32 66|42 82|52 98|62 114|72
3|03 19|13 35|23 51|33 67|43 83|53 99|63 115|73
4|04 20|14 36|24 52|34 68|44 84|54 100|64 116|74
5|05 21|15 37|25 53|35 69|45 85|55 101|65 117|75
6|06 22|16 38|26 54|36 70|46 86|56 102|66 118|76
7|07 23|17 39|27 55|37 71|47 87|57 103|67 119|77
8|08 24|18 40|28 56|38 72|48 88|58 104|68 120|78
9|09 25|19 41|29 57|39 73|49 89|59 105|69 121|79
10|0A 26|1A 42|2A 58|3A 74|4A 90|5A 106|6A 122|7A
11|0B 27|1B 43|2B 59|3B 75|4B 91|5B 107|6B 123|7B
12|0C 28|1C 44|2C 60|3C 76|4C 92|5C 108|6C 124|7C
13|0D 29|1D 45|2D 61|3D 77|4D 93|5D 109|6D 125|7D
14|0E 30|1E 46|2E 62|3E 78|4E 94|5E 110|6E 126|7E
15|0F 31|1F 47|2F 63|3F 79|4F 95|5F 111|6F 127|7F
- Tekens erbij, maar vervang 0, 7, 8, 9, 10 en 13 met spaties, omdat dit beheertekens (control characters) betreft.
$ xidel -se 'for $x in 0 to 15 return join((0 to 127)[. mod 16 eq $x] ! (concat(if (. = (0 to 9,96 to 99)) then " "||. else .,"|",x:integer-to-base(.,16) ! (if (string-length(.) eq 1) then "0"||. else .)),if (. = (0,7,8,9,10,13)) then " " else x:cps(.)))'
$ xidel -se 'for $x in 0 to 15 return join((0 to 7) ! (. * 16 + $x) ! (concat(if (. = (0 to 9,96 to 99)) then " "||. else .,"|",x:integer-to-base(.,16) ! (if (string-length(.) eq 1) then "0"||. else .)),if (. = (0,7,8,9,10,13)) then " " else x:cps(.)))'
0|00 16|10 ► 32|20 48|30 0 64|40 @ 80|50 P 96|60 ` 112|70 p
1|01 ☺ 17|11 ◄ 33|21 ! 49|31 1 65|41 A 81|51 Q 97|61 a 113|71 q
2|02 ☻ 18|12 ↕ 34|22 " 50|32 2 66|42 B 82|52 R 98|62 b 114|72 r
3|03 ♥ 19|13 ‼ 35|23 # 51|33 3 67|43 C 83|53 S 99|63 c 115|73 s
4|04 ♦ 20|14 ¶ 36|24 $ 52|34 4 68|44 D 84|54 T 100|64 d 116|74 t
5|05 ♣ 21|15 § 37|25 % 53|35 5 69|45 E 85|55 U 101|65 e 117|75 u
6|06 ♠ 22|16 ▬ 38|26 & 54|36 6 70|46 F 86|56 V 102|66 f 118|76 v
7|07 23|17 ↨ 39|27 ' 55|37 7 71|47 G 87|57 W 103|67 g 119|77 w
8|08 24|18 ↑ 40|28 ( 56|38 8 72|48 H 88|58 X 104|68 h 120|78 x
9|09 25|19 ↓ 41|29 ) 57|39 9 73|49 I 89|59 Y 105|69 i 121|79 y
10|0A 26|1A → 42|2A * 58|3A : 74|4A J 90|5A Z 106|6A j 122|7A z
11|0B ♂ 27|1B ← 43|2B + 59|3B ; 75|4B K 91|5B [ 107|6B k 123|7B {
12|0C ♀ 28|1C ∟ 44|2C , 60|3C < 76|4C L 92|5C \ 108|6C l 124|7C |
13|0D 29|1D ↔ 45|2D - 61|3D = 77|4D M 93|5D ] 109|6D m 125|7D }
14|0E ♫ 30|1E ▲ 46|2E . 62|3E > 78|4E N 94|5E ^ 110|6E n 126|7E ~
15|0F ☼ 31|1F ▼ 47|2F / 63|3F ? 79|4F O 95|5F _ 111|6F o 127|7F ⌂
ALT+<cp> voor weergave (Windows). # ALT 1 of ALT 127.
&#<cp>; / &#x<hex> voor HTML. #  /  of  / .
\x<hex> voor Javascript. # \x01 of \x7F.
\u00<hex> voor JSON. # \u0001 of \u007F.
- De beheertekens (control characters).
0|NUL \0 � null
7|BEL \a  bell
8|BS \b  backspace
9|HT \t 	 horizontal tab
10|LF \n line feed
13|CR \r carriage return
------------------------------------------------------------------------------------------------
Extended ASCII 8bit (2^8=256), 127 t/m 255:
- ISO 8859-1 / Latin-1 / "Unicode" in charmap.exe (Character Map).
$ xidel -se 'for $x in 0 to 15 return join((128 to 255)[. mod 16 eq $x] ! (concat(.,"|",x:integer-to-base(.,16)),x:cps(.)))' [--output-encoding=oem]
$ xidel -se 'for $x in 0 to 15 return join((128 to 255)[. mod 16 eq $x] ! (concat(.,"|",x:integer-to-base(.,16)),binary-to-string(xs:hexBinary(x:integer-to-base(.,16)),"latin1")))'
128|80 ? 144|90 ? 160|A0 176|B0 ° 192|C0 A 208|D0 D 224|E0 à 240|F0 d
129|81 ? 145|91 ? 161|A1 ¡ 177|B1 ± 193|C1 A 209|D1 Ñ 225|E1 á 241|F1 ñ
130|82 ? 146|92 ? 162|A2 ¢ 178|B2 ² 194|C2 A 210|D2 O 226|E2 â 242|F2 ò
131|83 ? 147|93 ? 163|A3 £ 179|B3 3 195|C3 A 211|D3 O 227|E3 a 243|F3 ó
132|84 ? 148|94 ? 164|A4 ☼ 180|B4 ' 196|C4 Ä 212|D4 O 228|E4 ä 244|F4 ô
133|85 ? 149|95 ? 165|A5 ¥ 181|B5 µ 197|C5 Å 213|D5 O 229|E5 å 245|F5 o
134|86 ? 150|96 ? 166|A6 ▌ 182|B6 ¶ 198|C6 Æ 214|D6 Ö 230|E6 æ 246|F6 ö
135|87 ? 151|97 ? 167|A7 § 183|B7 · 199|C7 Ç 215|D7 x 231|E7 ç 247|F7 ÷
136|88 ? 152|98 ? 168|A8 " 184|B8 , 200|C8 E 216|D8 O 232|E8 è 248|F8 o
137|89 ? 153|99 ? 169|A9 c 185|B9 1 201|C9 É 217|D9 U 233|E9 é 249|F9 ù
138|8A ? 154|9A ? 170|AA ª 186|BA º 202|CA E 218|DA U 234|EA ê 250|FA ú
139|8B ? 155|9B ? 171|AB « 187|BB » 203|CB E 219|DB U 235|EB ë 251|FB û
140|8C ? 156|9C ? 172|AC ¬ 188|BC ¼ 204|CC I 220|DC Ü 236|EC ì 252|FC ü
141|8D ? 157|9D ? 173|AD - 189|BD ½ 205|CD I 221|DD Y 237|ED í 253|FD y
142|8E ? 158|9E ? 174|AE r 190|BE _ 206|CE I 222|DE _ 238|EE î 254|FE _
143|8F ? 159|9F ? 175|AF _ 191|BF ¿ 207|CF I 223|DF ß 239|EF ï 255|FF ÿ
128 t/m 159 zijn beheertekens. ANSI / Windows-1252 / "Windows: Western" in charmap.exe heeft deze vervangen met de volgende grafische tekens:
128|80 € 144|90
129|81 145|91 ‘
130|82 ‚ 146|92 ’
131|83 ƒ 147|93 “
132|84 „ 148|94 ”
133|85 … 149|95 •
134|86 † 150|96 –
135|87 ‡ 151|97 —
136|88 ˆ 152|98 ˜
137|89 ‰ 153|99 ™
138|8A Š 154|9A š
139|8B ‹ 155|9B ›
140|8C Œ 156|9C œ
141|8D 157|9D
142|8E Ž 158|9E ž
143|8F 159|9F Ÿ
"latin1" heeft ze dus niet, maar het "Raster Fonts" in CMD (en dus Cygwin Bash) ondersteunt ze ook niet.
Geldige opties voor $encoding: utf8, utf-32le, oem, utf-8, latin1, utf-16, utf-16be, utf-32be, utf-32.
ALT+0<cp> voor weergave (Windows). # ALT 0163 of ALT 0255.
&#<cp>; / &#x<hex> voor HTML. # £ / £ of ÿ / ÿ.
\x<hex> voor Javascript. # \xA3 of \xFF.
\u00<hex> voor JSON. # \u00A3 of \u00FF.
- Code page 437 / CP437 / OEM-US / "DOS: United States" in charmap.exe.
$ xidel -se 'for $x in 0 to 15 return join((128 to 255)[. mod 16 eq $x] ! (concat(.,"|",x:integer-to-base(.,16)),x:cps(.)))' --output-encoding=latin1
$ xidel -se 'for $x in 0 to 15 return join((128 to 255)[. mod 16 eq $x] ! (concat(.,"|",x:integer-to-base(.,16)),binary-to-string(xs:hexBinary(x:integer-to-base(.,16)),"oem")))'
128|80 Ç 144|90 É 160|A0 á 176|B0 ░ 192|C0 └ 208|D0 ╨ 224|E0 α 240|F0 ≡
129|81 ü 145|91 æ 161|A1 í 177|B1 ▒ 193|C1 ┴ 209|D1 ╤ 225|E1 ß 241|F1 ±
130|82 é 146|92 Æ 162|A2 ó 178|B2 ▓ 194|C2 ┬ 210|D2 ╥ 226|E2 Γ 242|F2 ≥
131|83 â 147|93 ô 163|A3 ú 179|B3 │ 195|C3 ├ 211|D3 ╙ 227|E3 π 243|F3 ≤
132|84 ä 148|94 ö 164|A4 ñ 180|B4 ┤ 196|C4 ─ 212|D4 ╘ 228|E4 Σ 244|F4 ⌠
133|85 à 149|95 ò 165|A5 Ñ 181|B5 ╡ 197|C5 ┼ 213|D5 ╒ 229|E5 σ 245|F5 ⌡
134|86 å 150|96 û 166|A6 ª 182|B6 ╢ 198|C6 ╞ 214|D6 ╓ 230|E6 µ 246|F6 ÷
135|87 ç 151|97 ù 167|A7 º 183|B7 ╖ 199|C7 ╟ 215|D7 ╫ 231|E7 τ 247|F7 ≈
136|88 ê 152|98 ÿ 168|A8 ¿ 184|B8 ╕ 200|C8 ╚ 216|D8 ╪ 232|E8 Φ 248|F8 °
137|89 ë 153|99 Ö 169|A9 ⌐ 185|B9 ╣ 201|C9 ╔ 217|D9 ┘ 233|E9 Θ 249|F9 ∙
138|8A è 154|9A Ü 170|AA ¬ 186|BA ║ 202|CA ╩ 218|DA ┌ 234|EA Ω 250|FA ·
139|8B ï 155|9B ¢ 171|AB ½ 187|BB ╗ 203|CB ╦ 219|DB █ 235|EB δ 251|FB √
140|8C î 156|9C £ 172|AC ¼ 188|BC ╝ 204|CC ╠ 220|DC ▄ 236|EC ∞ 252|FC ⁿ
141|8D ì 157|9D ¥ 173|AD ¡ 189|BD ╜ 205|CD ═ 221|DD ▌ 237|ED φ 253|FD ²
142|8E Ä 158|9E ₧ 174|AE « 190|BE ╛ 206|CE ╬ 222|DE ▐ 238|EE ε 254|FE ■
143|8F Å 159|9F ƒ 175|AF » 191|BF ┐ 207|CF ╧ 223|DF ▀ 239|EF ∩ 255|FF
CMD (en dus Cygwin Bash) is standaard afgesteld op CHCP 437 (oem). Hierdoor krijg je dit rare tafereel dat --output-encoding precies andersom werkt.
ALT+<cp> voor weergave (Windows). # ALT 128 of ALT 253.
$ xidel -se 'for $x in 0 to 31 return join((0 to 7) ! (. * 32 + $x) ! (concat(if (. = (0 to 9,96 to 99)) then " "||. else .,"|",x:integer-to-base(.,16) ! (if (string-length(.) eq 1) then "0"||. else .)),if (. = (0,7,8,9,10,13)) then " " else x:cps(.)))' --output-encoding=latin1
$ xidel -se 'for $x in 0 to 31 return join((0 to 7) ! (. * 32 + $x) ! (concat(if (. = (0 to 9,96 to 99)) then " "||. else .,"|",x:integer-to-base(.,16) ! (substring("0",string-length(.),1)||.)),if (. = (0,7,8,9,10,13)) then " " else x:integer-to-base(.,16) ! binary-to-string(hexBinary(substring("0",string-length(.),1)||.),"oem")))'
0|00 32|20 64|40 @ 96|60 ` 128|80 Ç 160|A0 á 192|C0 └ 224|E0 α
1|01 ☺ 33|21 ! 65|41 A 97|61 a 129|81 ü 161|A1 í 193|C1 ┴ 225|E1 ß
2|02 ☻ 34|22 " 66|42 B 98|62 b 130|82 é 162|A2 ó 194|C2 ┬ 226|E2 Γ
3|03 ♥ 35|23 # 67|43 C 99|63 c 131|83 â 163|A3 ú 195|C3 ├ 227|E3 π
4|04 ♦ 36|24 $ 68|44 D 100|64 d 132|84 ä 164|A4 ñ 196|C4 ─ 228|E4 Σ
5|05 ♣ 37|25 % 69|45 E 101|65 e 133|85 à 165|A5 Ñ 197|C5 ┼ 229|E5 σ
6|06 ♠ 38|26 & 70|46 F 102|66 f 134|86 å 166|A6 ª 198|C6 ╞ 230|E6 µ
7|07 39|27 ' 71|47 G 103|67 g 135|87 ç 167|A7 º 199|C7 ╟ 231|E7 τ
8|08 40|28 ( 72|48 H 104|68 h 136|88 ê 168|A8 ¿ 200|C8 ╚ 232|E8 Φ
9|09 41|29 ) 73|49 I 105|69 i 137|89 ë 169|A9 ⌐ 201|C9 ╔ 233|E9 Θ
10|0A 42|2A * 74|4A J 106|6A j 138|8A è 170|AA ¬ 202|CA ╩ 234|EA Ω
11|0B ♂ 43|2B + 75|4B K 107|6B k 139|8B ï 171|AB ½ 203|CB ╦ 235|EB δ
12|0C ♀ 44|2C , 76|4C L 108|6C l 140|8C î 172|AC ¼ 204|CC ╠ 236|EC ∞
13|0D 45|2D - 77|4D M 109|6D m 141|8D ì 173|AD ¡ 205|CD ═ 237|ED φ
14|0E ♫ 46|2E . 78|4E N 110|6E n 142|8E Ä 174|AE « 206|CE ╬ 238|EE ε
15|0F ☼ 47|2F / 79|4F O 111|6F o 143|8F Å 175|AF » 207|CF ╧ 239|EF ∩
16|10 ► 48|30 0 80|50 P 112|70 p 144|90 É 176|B0 ░ 208|D0 ╨ 240|F0 ≡
17|11 ◄ 49|31 1 81|51 Q 113|71 q 145|91 æ 177|B1 ▒ 209|D1 ╤ 241|F1 ±
18|12 ↕ 50|32 2 82|52 R 114|72 r 146|92 Æ 178|B2 ▓ 210|D2 ╥ 242|F2 ≥
19|13 ‼ 51|33 3 83|53 S 115|73 s 147|93 ô 179|B3 │ 211|D3 ╙ 243|F3 ≤
20|14 ¶ 52|34 4 84|54 T 116|74 t 148|94 ö 180|B4 ┤ 212|D4 ╘ 244|F4 ⌠
21|15 § 53|35 5 85|55 U 117|75 u 149|95 ò 181|B5 ╡ 213|D5 ╒ 245|F5 ⌡
22|16 ▬ 54|36 6 86|56 V 118|76 v 150|96 û 182|B6 ╢ 214|D6 ╓ 246|F6 ÷
23|17 ↨ 55|37 7 87|57 W 119|77 w 151|97 ù 183|B7 ╖ 215|D7 ╫ 247|F7 ≈
24|18 ↑ 56|38 8 88|58 X 120|78 x 152|98 ÿ 184|B8 ╕ 216|D8 ╪ 248|F8 °
25|19 ↓ 57|39 9 89|59 Y 121|79 y 153|99 Ö 185|B9 ╣ 217|D9 ┘ 249|F9 ∙
26|1A → 58|3A : 90|5A Z 122|7A z 154|9A Ü 186|BA ║ 218|DA ┌ 250|FA ·
27|1B ← 59|3B ; 91|5B [ 123|7B { 155|9B ¢ 187|BB ╗ 219|DB █ 251|FB √
28|1C ∟ 60|3C < 92|5C \ 124|7C | 156|9C £ 188|BC ╝ 220|DC ▄ 252|FC ⁿ
29|1D ↔ 61|3D = 93|5D ] 125|7D } 157|9D ¥ 189|BD ╜ 221|DD ▌ 253|FD ²
30|1E ▲ 62|3E > 94|5E ^ 126|7E ~ 158|9E ₧ 190|BE ╛ 222|DE ▐ 254|FE ■
31|1F ▼ 63|3F ? 95|5F _ 127|7F ⌂ 159|9F ƒ 191|BF ┐ 223|DF ▀ 255|FF
================================================================================================
[Epoch/datum/tijd/tijdzone conversies]
$ date +%:z
+01:00 # UTC+1 (Nederland, wintertijd).
$ xidel -se 'implicit-timezone()'
$ xidel -se 'time("00:00:00") - time("00:00:00'$(date +%:z)'")' # Vóór xidel-0.9.9.7433-8b7ba70.
PT1H # Tijdzone als dayTimeDuration().
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Unix time (also known as Epoch time, POSIX time, seconds since the Epoch, or UNIX Epoch time) is a system for describing a point in time. It is the number of seconds that have elapsed since the Unix epoch, minus leap seconds; the Unix epoch is 00:00:00 UTC on 1 January 1970" (https://en.wikipedia.org/wiki/Unix_time)
$ date -d @946683000 -u '+%FT%T%:z'
1999-12-31T23:30:00+00:00 # UTC tijd.
$ xidel -se 'duration("PT"||946683000||"S") + dateTime("1970-01-01T00:00:00Z")'
$ xidel -se '946683000 * duration("PT1S") + dateTime("1970-01-01T00:00:00Z")'
1999-12-31T23:30:00Z # UTC tijd.
$ date -d @946683000 '+%FT%T%:z'
$ xidel -se 'adjust-dateTime-to-timezone(946683000 * duration("PT1S") + implicit-timezone() + dateTime("1970-01-01T00:00:00"))'
$ xidel -se 'adjust-dateTime-to-timezone(946683000 * duration("PT1S") + dateTime("1970-01-01T00:00:00Z"))'
2000-01-01T00:30:00+01:00 # UTC+1 tijd.
$ date -d 2000-01-01T00:30:00+01:00 '+%s'
$ xidel -se '(dateTime("2000-01-01T00:30:00+01:00") - dateTime("1970-01-01T00:00:00") - implicit-timezone()) div dayTimeDuration("PT1S")'
$ xidel -se '(dateTime("2000-01-01T00:30:00+01:00") - dateTime("1970-01-01T00:00:00Z")) div dayTimeDuration("PT1S")'
946683000
Voor een deling is expliciet dayTimeDuration() nodig. Zie https://sourceforge.net/p/videlibri/mailman/videlibri-xidel/thread/7e952f3d-18d5-ede8-17df-8480b2594b7c%40benibela.de/#msg36722060.
$ date -d @946683000 '+%d-%m-%Y'
$ xidel -se 'format-date(adjust-dateTime-to-timezone(946683000 * duration("PT1S") + dateTime("1970-01-01T00:00:00Z")),"[D01]-[M01]-[Y]")'
01-01-2000
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
$ xidel -se '
adjust-dateTime-to-timezone(dateTime("1999-12-31T23:30:00")),
adjust-dateTime-to-timezone(dateTime("1999-12-31T23:30:00Z")),
adjust-dateTime-to-timezone(dateTime("1999-12-31T23:30:00-05:00")),
adjust-dateTime-to-timezone(dateTime("1999-12-31T23:30:00-05:00"),duration("PT0S")),
adjust-dateTime-to-timezone(dateTime("1999-12-31T23:30:00-05:00"),duration("PT9H"))
'
1999-12-31T23:30:00+01:00 # Datetime zonder tijdzone wordt beschouwd als lokaal en krijgt alleen de lokale tijdzone er achter.
2000-01-01T00:30:00+01:00 # Datetime met tijdzone wordt geconverteerd naar lokale datetime; UTC+1 (Nederland, wintertijd).
2000-01-01T05:30:00+01:00 # Van UTC−5 (New York) naar UTC+1 (Nederland, wintertijd).
2000-01-01T04:30:00Z # Van UTC−5 (New York) naar UTC.
2000-01-01T13:30:00+09:00 # Van UTC−5 (New York) naar UTC+9 (Japan).
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
$ xidel -se '
"'$(date +%FT%T%:z)'",
"'$(date -u +%FT%T%:z)'",
current-dateTime(),
adjust-dateTime-to-timezone(current-dateTime(),duration("PT0S")),
format-dateTime(current-dateTime(),"[Y]-[M01]-[D01]T[H01]:[m01]:[s01][Z]"),
format-dateTime(current-dateTime() + duration("PT0.5S"),"[Y]-[M01]-[D01]T[H01]:[m01]:[s01][Z]"),
format-dateTime(adjust-dateTime-to-timezone(current-dateTime() + duration("PT0.5S"),duration("PT0S")),"[Y]-[M01]-[D01]T[H01]:[m01]:[s01][Z]")
'
2020-12-18T13:53:33+01:00 # Huidige lokale tijd.
2020-12-18T12:53:33+00:00 # Huidige UTC tijd.
2020-12-18T13:53:33.718+01:00 # Huidige lokale tijd.
2020-12-18T12:53:33.718Z # Huidige UTC tijd.
2020-12-18T13:53:33+01:00 # Huidige lokale tijd, zonder milliseconden.
2020-12-18T13:53:34+01:00 # Huidige lokale tijd, met afgeronde seconden.
2020-12-18T12:53:34+00:00 # Huidige UTC tijd, met afgeronde seconden.
$ xidel -se '
"'$(date +%s)'",
(current-dateTime() - dateTime("1970-01-01T00:00:00Z")) div dayTimeDuration("PT1S"),
round((current-dateTime() - dateTime("1970-01-01T00:00:00Z")) div dayTimeDuration("PT1S"))
'
1608296013
1608296013.718
1608296014
------------------------------------------------------------------------------------------------
Afronden:
$ xidel -se '
format-time(time("00:19:06.040"),"[H01]:[m01]:[s01]"),
format-time(time("00:19:06.540"),"[H01]:[m01]:[s01]"),
format-time(time("00:19:06.540") + duration("PT0.5S"),"[H01]:[m01]:[s01]")
'
00:19:06
00:19:06
00:19:07
------------------------------------------------------------------------------------------------
Zomer-/Wintertijd gecorrigeerde dateTime:
$ xidel -s --module=functx-1.0.1-doc.xq -e 'functx:day-of-week("2020-12-25")' # http://www.xqueryfunctions.com/xq/functx_day-of-week.html
$ xidel -se 'days-from-duration(date("2020-12-25") - date("1901-01-06")) mod 7'
5 # 0 = zondag, 6 = zaterdag.
$ xidel -se '("zo","ma","di","wo","do","vr","za")[days-from-duration(date("2020-12-25") - date("1901-01-06")) mod 7 + 1]'
$ xidel -se '("zo","ma","di","wo","do","vr","za")[days-from-duration(date("2020-12-25") - date("0000-01-01")) mod 7 + 1]'
vr # Eerste Kerstdag 2020 was dus op een vrijdag.
functx:day-of-week() gebruikt 1901-01-06, een zondag, als referentiepunt, maar teruggerekend was 1 januari in het jaar 0 ook een zondag.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
$ xidel -se '(25 to 31)[days-from-duration(date("2020-03-"||.) - date("0000-01-01")) mod 7 eq 0],(25 to 31)[days-from-duration(date("2020-10-"||.) - date("0000-01-01")) mod 7 eq 0]'
$ xidel -se 'for $x in ("-03-","-10-") return (25 to 31)[days-from-duration(date("2020"||$x||.) - date("0000-01-01")) mod 7 eq 0]'
$ xidel -se 'for $x in (3,10) return (25 to 31)[days-from-duration(date(join(("2020",format-integer($x,"00"),.),"-")) - date("0000-01-01")) mod 7 eq 0]'
29 # 29 maart 2020, de laatste zondag van de maand, begin zomertijd.
25 # 25 oktober 2020, de laatste zondag van de maand, einde zomertijd.
$ xidel -s --xquery 'let $year:=year-from-dateTime(current-dateTime()) for $x in ("-03-","-10-") return dateTime(concat($year,$x,(25 to 31)[days-from-duration(date(concat($year,$x,.)) - date("0000-01-01")) mod 7 eq 0],"T01:00:00Z"))'
2020-03-29T01:00:00Z # Begin zomertijd.
2020-10-25T01:00:00Z # Einde zomertijd.
Vóór 1996 golden er andere regels, maar aangezien de kans vrij groot is dat de data die Xivid ontleedt allemaal
van ná die tijd is ga ik die hier niet in betrekken. Zie https://nl.wikipedia.org/wiki/Zomertijd#Nederland.
----------------------------------------------------------------
$ xidel -s --xquery 'declare function local:is-summertime($arg as dateTime) as boolean {let $year:=year-from-dateTime($arg),$dst:=for $x in ("-03-","-10-") return dateTime(concat($year,$x,(25 to 31)[days-from-duration(date(concat($year,$x,.)) - date("0000-01-01")) mod 7 eq 0],"T01:00:00Z")) return $dst[1] le dateTime($arg) and dateTime($arg) lt $dst[2]}; local:is-summertime(dateTime("2020-03-29T01:00:00Z"))'
true
----------------------------------------------------------------
$ xidel -s --xquery 'declare function local:adjust-dateTime-to-dst($arg as anyAtomicType) as dateTime {let $is-summertime:=function($arg as dateTime) as boolean {let $year:=year-from-dateTime($arg),$dst:=for $x in ("-03-","-10-") return dateTime(concat($year,$x,(25 to 31)[days-from-duration(date(concat($year,$x,.)) - date("0000-01-01")) mod 7 eq 0],"T01:00:00Z")) return $dst[1] le dateTime($arg) and dateTime($arg) lt $dst[2]} return adjust-dateTime-to-timezone(dateTime($arg),if ($is-summertime(current-dateTime())) then if ($is-summertime(dateTime($arg))) then implicit-timezone() else implicit-timezone() - duration("PT1H") else if ($is-summertime(dateTime($arg))) then implicit-timezone() + duration("PT1H") else implicit-timezone())}; local:adjust-dateTime-to-dst("2020-03-29T01:00:00Z")'
2020-03-29T03:00:00+02:00
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
declare function xivid:adjust-dateTime-to-dst($arg as anyAtomicType) as dateTime {
let $is-summertime:=function($arg as dateTime) as boolean {
let $year:=year-from-dateTime($arg),
$dst:=for $x in ("-03-","-10-") return
dateTime(
concat(
$year,
$x,
(25 to 31)[
days-from-duration(
date(concat($year,$x,.)) - date("0000-01-01")
) mod 7 eq 0
],
"T01:00:00Z"
)
)
return
$dst[1] le dateTime($arg) and dateTime($arg) lt $dst[2]
}
return
adjust-dateTime-to-timezone(
dateTime($arg),
if ($is-summertime(current-dateTime())) then
if ($is-summertime(dateTime($arg))) then
implicit-timezone()
else
implicit-timezone() - duration("PT1H")
else
if ($is-summertime(dateTime($arg))) then
implicit-timezone() + duration("PT1H")
else
implicit-timezone()
)
};
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Begin zomertijd 2020:
$ date -d 2020-03-29T02:00:00+01:00 +%s
$ date -d 2020-03-29T03:00:00+02:00 +%s
$ xidel -se '(dateTime("2020-03-29T02:00:00+01:00") - dateTime("1970-01-01T00:00:00Z")) div dayTimeDuration("PT1S")'
$ xidel -se '(dateTime("2020-03-29T03:00:00+02:00") - dateTime("1970-01-01T00:00:00Z")) div dayTimeDuration("PT1S")'
1585443600
$ date -d 2020-03-29T01:59:59+01:00 -u +%FT%T%:z / $ date -d @1585443599 -u +%FT%T%:z
$ date -d 2020-03-29T02:00:00+01:00 -u +%FT%T%:z / $ date -d @1585443600 -u +%FT%T%:z
$ date -d 2020-03-29T01:59:59+01:00 +%FT%T%:z / $ date -d @1585443599 +%FT%T%:z
$ date -d 2020-03-29T02:00:00+01:00 +%FT%T%:z / $ date -d @1585443600 +%FT%T%:z
2020-03-29T00:59:59+00:00
2020-03-29T01:00:00+00:00
2020-03-29T01:59:59+01:00 # 1 seconde vóór begin zomertijd.
2020-03-29T03:00:00+02:00 # begin zomertijd.
$ xidel -s --module=xivid.xqm -e '
adjust-dateTime-to-timezone(dateTime("2020-03-29T01:59:59+01:00"),duration("PT0S")),
adjust-dateTime-to-timezone(dateTime("2020-03-29T02:00:00+01:00"),duration("PT0S")),
adjust-dateTime-to-timezone(dateTime("2020-03-29T01:59:59+01:00")),
adjust-dateTime-to-timezone(dateTime("2020-03-29T02:00:00+01:00")),
xivid:adjust-dateTime-to-dst("2020-03-29T01:59:59+01:00"),
xivid:adjust-dateTime-to-dst("2020-03-29T02:00:00+01:00")
'
2020-03-29T00:59:59Z
2020-03-29T01:00:00Z
2020-03-29T01:59:59+01:00
2020-03-29T02:00:00+01:00 # Xidel heeft geen zomertijd/wintertijd database en past de dateTime aan met de implicit-timezone() van dit moment (december; PT1H).
2020-03-29T01:59:59+01:00
2020-03-29T03:00:00+02:00
$ xidel -s --module=xivid.xqm -e '
1585443599 * duration("PT1S") + dateTime("1970-01-01T00:00:00Z"),
1585443600 * duration("PT1S") + dateTime("1970-01-01T00:00:00Z"),
adjust-dateTime-to-timezone(1585443599 * duration("PT1S") + dateTime("1970-01-01T00:00:00Z")),
adjust-dateTime-to-timezone(1585443600 * duration("PT1S") + dateTime("1970-01-01T00:00:00Z")),
xivid:adjust-dateTime-to-dst(1585443599 * duration("PT1S") + dateTime("1970-01-01T00:00:00Z")),
xivid:adjust-dateTime-to-dst(1585443600 * duration("PT1S") + dateTime("1970-01-01T00:00:00Z"))