120 lines
3.0 KiB
Nix
120 lines
3.0 KiB
Nix
let
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inherit(builtins) bitAnd concatMap elemAt foldl' genList length map split;
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byteAt
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= dword:
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index:
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if index == 0 then bitAnd dword 255
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else if index == 1 then bitAnd (dword / shift1) 255
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else if index == 2 then bitAnd (dword / shift2) 255
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else if index == 3 then dword / shift3
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else null;
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shift1 = 256;
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shift2 = 256 * 256;
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shift3 = 256 * 256 * 256;
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hexByte
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= byte:
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let
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h = byte / 16;
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l = bitAnd byte 15;
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x = [ "0" "1" "2" "3" "4" "5" "6" "7" "8" "9" "a" "b" "c" "d" "e" "f" ];
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x' = elemAt x;
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in
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"${x' h}${x' l}";
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hex
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= dword:
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let
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dword' = byteAt dword;
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a = hexByte (dword' 0);
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b = hexByte (dword' 1);
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c = hexByte (dword' 2);
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d = hexByte (dword' 3);
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in
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"${a}${b}${c}${d}";
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toChars
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= text:
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concatMap
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(
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x:
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if x == ""
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then
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[]
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else
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x
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)
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(split "(.)" text);
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ascii
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= toChars
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" !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz(|)~";
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char2int
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= (
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foldl'
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(
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{ result, index }:
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character:
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{
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result
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= result
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// {
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${character} = index;
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};
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index = index + 1;
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}
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)
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{
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index = 32;
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result
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= {
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"\t" = 9;
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"\n" = 10;
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"\r" = 13;
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};
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}
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ascii
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).result;
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toIntegers
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= text:
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map
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(
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character:
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char2int.${character}
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)
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(toChars text);
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toDWords
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= data:
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let
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data'
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= if __typeOf data == "string"
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then
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toIntegers data
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else
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data;
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data'' = data' ++ [ 0 0 0 ];
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d = elemAt data'';
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in
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genList
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(
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i:
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let
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i' = i * 4;
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in
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(d i')
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+ (d (i' + 1)) * shift1
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+ (d (i' + 2)) * shift2
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+ (d (i' + 3)) * shift3
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)
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((length data'') / 4);
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in
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{
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inherit hex toIntegers toDWords;
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}
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