without actually running this code, can you figure out which prime number has been encoded within the input of ASCII letters

[ Mcb ]

plus the trick that allowed me to achieve such a compression ratio.

* The code works equally well in gawk, mawk-1, mawk2, and nawk.
It is ENTIRELY self-encapsulated.

Enjoy !

= === === === === === === === === === === === === ==

echo; cmd=' echo Mcb | mawk2 '\''function _________(__,_,___) { (___="bc <<< \"obase="(_*=_^=_+=++_)"; "(__)" ;\"")|getline _; close(___); return _ } BEGIN {_____="%c";for(_-=(___-=(_=(_*=_*=_*=_+=++_)))^!_;-""<=_;_--) {__[sprintf(_____,___-+-_)]=_}; for(
_ in __) { __[_] } } {____=+""; for(_=_____=length($(____));_;_--) { ___=__[substr($(____),_,!!_)]___ }; ______=___%(_____=((!-"")(-""))^(_____*=(_^=_=-"")^-!-""));_______=int(___/_____);___="%*.f"; ________=sprintf((___"_")___,--_______,!_,--______+-+___
____,!___); gsub(/[^_]/,_^!_,________); sub(/[_]/,+"",________); sub(/..$/,"",_____);_____+=_="";_+=_^=_; printf(" log-base-"(_)" :: %."(_^_^_)"g%c%c %c digits in decimal :: %d%c%c 0x %s%c%c",log(_)^(_/-_)*(log((".")(________))+log(_____)*(___=length(____
____))), _____, _____,_^_*_____-_^-!!_*_____,___,_____,_____, _________(________), _____,_____); system("openssl prime -checks "(_+=_*=(_^=_)*_)" "(________)) }'\'' '; gprintf '\n%s\n\n' "${cmd}" ; echo; eval "${cmd}"

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Subject: Re: obfuscated AWK code challenge

It's arguable whether it's appropriate to call code an "AWK code
challenge" that obviously relies on external commands like 'od',
'openssl', and various shell commands _within_ the awk code.

Janis


On 27.12.2021 03:53, RARE Kpop Manifesto wrote:

without actually running this code, can you figure out which prime number has been encoded within the input of ASCII letters

[ Mcb ]

plus the trick that allowed me to achieve such a compression ratio.

* The code works equally well in gawk, mawk-1, mawk2, and nawk.
It is ENTIRELY self-encapsulated.

Enjoy !

= === === === === === === === === === === === === ==

echo; cmd=' echo Mcb | mawk2 '\''function _________(__,_,___) { (___="bc <<< \"obase="(_*=_^=_+=++_)"; "(__)" ;\"")|getline _; close(___); return _ } BEGIN {_____="%c";for(_-=(___-=(_=(_*=_*=_*=_+=++_)))^!_;-""<=_;_--) {__[sprintf(_____,___-+-_)]=_};

for(_ in __) { __[_] } } {____=+""; for(_=_____=length($(____));_;_--) { ___=__[substr($(____),_,!!_)]___ }; ______=___%(_____=((!-"")(-""))^(_____*=(_^=_=-"")^-!-""));_______=int(___/_____);___="%*.f"; ________=sprintf((___"_")___,--_______,!_,--______+-
+_______,!___); gsub(/[^_]/,_^!_,________); sub(/[_]/,+"",________); sub(/..$/,"",_____);_____+=_="";_+=_^=_; printf(" log-base-"(_)" :: %."(_^_^_)"g%c%c %c digits in decimal :: %d%c%c 0x %s%c%c",log(_)^(_/-_)*(log((".")(________))+log(_____)*(___=length(
________))), _____, _____,_^_*_____-_^-!!_*_____,___,_____,_____, _________(________), _____,_____); system("openssl prime -checks "(_+=_*=(_^=_)*_)" "(________)) }'\'' '; gprintf '\n%s\n\n' "${cmd}" ; echo; eval "${cmd}"


--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 12/26/2021 8:53 PM, RARE Kpop Manifesto wrote:

without actually running this code, can you figure out which prime number has been encoded within the input of ASCII letters

Serious question - why would we want to do that? Is this homework?

[ Mcb ]

plus the trick that allowed me to achieve such a compression ratio.

* The code works equally well in gawk, mawk-1, mawk2, and nawk.
It is ENTIRELY self-encapsulated.

No, it's not, it's spawning subshells to call external tools from awk
and using shell to populate a variable then calling eval to execute it.
You could call this a shell code challenge I suppose but there's still
the question of "why?".

Ed.

Enjoy !

= === === === === === === === === === === === === ==

echo; cmd=' echo Mcb | mawk2 '\''function _________(__,_,___) { (___="bc <<< \"obase="(_*=_^=_+=++_)"; "(__)" ;\"")|getline _; close(___); return _ } BEGIN {_____="%c";for(_-=(___-=(_=(_*=_*=_*=_+=++_)))^!_;-""<=_;_--) {__[sprintf(_____,___-+-_)]=_};

for(_ in __) { __[_] } } {____=+""; for(_=_____=length($(____));_;_--) { ___=__[substr($(____),_,!!_)]___ }; ______=___%(_____=((!-"")(-""))^(_____*=(_^=_=-"")^-!-""));_______=int(___/_____);___="%*.f"; ________=sprintf((___"_")___,--_______,!_,--______+-
+_______,!___); gsub(/[^_]/,_^!_,________); sub(/[_]/,+"",________); sub(/..$/,"",_____);_____+=_="";_+=_^=_; printf(" log-base-"(_)" :: %."(_^_^_)"g%c%c %c digits in decimal :: %d%c%c 0x %s%c%c",log(_)^(_/-_)*(log((".")(________))+log(_____)*(___=length(
________))), _____, _____,_^_*_____-_^-!!_*_____,___,_____,_____, _________(________), _____,_____); system("openssl prime -checks "(_+=_*=(_^=_)*_)" "(________)) }'\'' '; gprintf '\n%s\n\n' "${cmd}" ; echo; eval "${cmd}"

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

the openssl part is only to do a real-time proving that whatever that was generated is indeed a 3312-bit prime number. The "bc" part is just to print that prime out in hex, that's all. if u want to u can ignore that part. i could add a bigint2hex
function here but it would bloat it up.

when i posted this one, 3312-bit was the largest i found, with this output :

log-base-2 :: 3312.114313696145

# digits in decimal :: 998

0x 1151C1900FBB915A46082603C8F0F9A89505D3D11D440819AB64EC6F02A03DE9D9ADB5BE503EF7BF92835B5E480BA38B69DF05C51BC341797A7F830A27E5BD987D6F9FF7ADE7617228200D1457DD81512E421655F9AA1252496124EFA42A709113D454C7C605C13CAE151822938F9CF88F182868A5F6A8EA5A007181B73
4F37EE8287BEEBC65D79C45ED096CDA1212298ABDFC6740B545B2FBA76661A855AE963C14E370031656B010E8EBBEE709727B15B86DD0C2C85D30ECE5AE9485933B64A3F6D41913C83D6E0CD267B315A5BE712927B2940C52498CFE2CDC490FE243643D8D43BF359B2F220EED2CC77B1A00998A6968E13016DA892EC80B3E07
A453CBAB356870BB4C87BE80C425B1B1D74C3BC4A0D000B10735C0C29B2885AD0D9929C7CB1C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C7111CF137D09F26D544CC35DBAF70FC67C02B7B5390BE713DA98BB8DB709D78DA1F0F9BFD19D7BA9DC48C0EE771761D5E72AA8E43E7921192570
8B0770CF93ECDF1C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C7

111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
11111111111110111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 is prime

that's not a bit-string - that's a base-10 decimal number that happens to only have 1's and 0's. This code actually runs pretty fast - no recursion needed, no loops in the main body (other than setting up a lookup table at beginning)

it's Mcb cuz knowing the very speicific structure of only 1s, and 1 single zero, all i have to encode would be total length, and position of that zero

779 is the position, 998 is the length
779998
by ASCII ordinance numbers, 77,99,98 maps to M, c, and b, which is even more efficient encoding that trying to encode that number in hex, which is BE6DE. Print that hex out as bytes x0B xE6 xDE and it's still 3-bytes needed, but won't be particularly
human-readable.

that's before. since the original posting, using the same technique, i could now encode a 13,789-bit prime using just 4 bytes (see below). What's the point ? i'm curious if any algorithm, anywhere, can achieve a better compression ratio than that. RLE is
still much larger, as is LZW or LZMA.

u can say mine is a bit cheating, since it's not a generic algorithm - i see it as : decompression algorithms are just a form of lossless reconstruction, so why limit the possibilities, as long as the output is what's intended ? there are algorithms
optimized for lossless compression of audio, like FLAC, so perhaps there should also be compression algorithms optimized for the key exchanges in cryptography .

Make the overhead low enough, and we could even move to a paradigm where every other message, or even every message, is a different one-time key.

function __________(__,_,___) {
(___="bc <<< \"obase="(_*=_^=\
_+=++_)"; "(__)" ;\"")|getline _;
close(___); return _ };

function _________(_,__,___,____,
_____,______,_______,________) {
_____="%c";
for(_-=(___-=(_=(_*=_*=_*=\
________=_+=++_)))^!_;\
-""<=_;_--) {__[\
sprintf(_____,___-+-_)]=\
(((______=sprintf(substr(_____,\
_^!___,!-"")(+"")(_______)"d",_)\
)!~/.../)?______\
: substr(______,(!-"")+(!-"")))
};for(_ in __) {
__[_] }
____=+(_______="")
_______=_=-(\
_^=_^=_+=_^=_="")
for(_=_____=length(____=sprintf(\
"%c%c%c%c",\
_______+(4-6)^6-4*6+4^!6,\
_______+46+6,\
_______+(4+6)^(-4+6),_______+46));_;_--) {
___=__[substr(____,_,!!_)]___;
}
if ((______=___%(_____=\
((!-"")(-""))^(_____*=\
(_^=_=-"")^-!-"")))<(_______=\
int(___/_____))) {___=______;
______=_______;_______=___}
___="%*.f";________=sprintf(\
(___"_")___,--_______,!_,\
--______+-+_______,!___)
gsub(/[^_]/,_^!_,________)
sub(/[_]/,+"",________)
sub(/..$/,"",_____)
_____=(_+=_^=_="")^_*_+_;
printf(" log-base-"(_)" :: %."(\
_^_^_)"g\n\n %c digits in "\
"decimal :: %d\n\n 0x %s\n\n",\
(log((".")(substr(________,_/_,\
_____*_*_____)))+log(_____)*(___=\
length(________)))/log(_),_____/-_+\
_^_*_____,___, __________(________))
system("openssl prime "\
" "(________)); return ________ };

log-base-2 :: 13789.47552497089

# digits in decimal :: 4152

0x 2C7E5AA2F0BE2B80FF9069A51FD1F58B439FCA60DEDD9D7F4F12FDCCAECEA620CC211B4A3DDB9E1CC7C6A478ACDD0DA895D8FA594B723A6D8F8D0A9998B2640A2089A54D82480D1218C764285FD9F96D8222623E64E7FD9C5B33359DC5B3C87591CE9BC6CE493E9CD0FA633BEC77432074E6E4FBB04D0BD33C9E4BE9207
6D7DFC75D6A78BCCE4D0A80949167BA292C7756CD0A7311118394E74D99728A2175149F57E0B3B081530AC1DFB6D05EFB02E82A83EBE03A4B73350EC780788438340462CB782ED9A5F3208DB16392CED5E976BCF1E385D88A494214F20186945A74151DFB107DFC33C3371E314C26906C5D5696F47E75F186D61454EE594A02
54DAA1877CAB24B23547D3FEB04E89DAEAD6577EF7251F893493FBD28E3D1045579BD9C9F8133001600F2D9A7B290350CB9A736D8D4F07C7183A6A6A8676204B692F7341FC8EE68D3DC20E00B015FBB946C7999A42DCFC26B6D78ECDCAD06457BE0BD51604C823DB5948AFB7F038ED981DBCDCCBF401DEC2C0F803A69DE914B
E1B99FBA80EA6CB41EB2F1D9DCE7DC1D14753F354B775B5E780C7B4114F241237691BF8549EC6D54F4A718CB81C35DE1E6DA861C56B57BA87998218EA10497378C60E2467CC5E20E54E583EF1396EE0BBEA29CD70B57515D8FCC44D681098EE61FE24D4D9CFAC54E2A63ACA9DBBB470291AB988346D7A015CE7C0DC0464FB52
72512149266B1BF1E292EB788B74EC716DA132FDD0FA4D1D66823E12748ECC06536A0956BAF2C6C1656A5A6C1E612E30263DECBD1FBBD34383DD34E6A7FF6FA0C19A264CF24E8374F5E55CF9B755BB00969F940D08384E1FB6A81C838E763953A8F8F0734570261AB051903A123BBA8FE4AF37FB36C4E61497FD5ECB84C1A17
0777591AB46513006859C777F91FDAA1464B7158258E83F27081ABA1F5B66F8377DA9EB96D4124C322FF5C0721CB097D317380EDC375F526B62B5D736F59FCC749B1C145584CE60ED15FE804FC4D533CCFA6DB77B0352B177A2E587D6D35932197969B20DB2327BE2DEF73EC46BDC17358B10ACFB4B01D460930BC27B3EE11E
E69692E4554C396231E8103B479335A68155949A9D2021C2D30AD16AB295339FA5D9BA7BBAA713F0AC26D8A5292AFC7F94583F3F0B193CCF6AC450178218EBA7D2396531B1F48A7ADF6915B0BEE0A2AF6C875A13145AABECADC63FCCCDEB097496C1115387690B2DDD4C51B6E22F8E060841AF02A4AFEB62A25B67C872E232F
6C70EAD3222E57BB12823C34225A12503549FB9F3E5D8967AD738B4D28FF72EC8FBAD18CF4AB82BD50F35B7A9A9D41CB27506363404D6092670C018F41D951A7F342CF5363459DAEC4E38B4797FACE0DF7356F67CE9694469AE27C68DC13C12EC6ACDB8F003C775B19650B9AACAB3C97CE2F8EC78EA7F05F7B3211EEA6A8006
316AE93EF4811ED6688F8BA34A7119B16438FD14EC1A21F22868738EA7D8F95E895438F1E7FA199E904A2869C39AEA681B10E7E00555539730E9CD1E4D842C31B1156ECCEE49B3E83F1542D6CC3CBD4E487D48832E7F4C93261F2792192146A429763E9B641A548492A5E0E76CAE75DB5D1B0F919FC79E15FA793027F1F9FC9
B8DA1C2FEB40B56AB442135606BE914B620541BB552F2D0A558E1133581E3749C4EBE585D68F31E70AE62965579F671EAD5F5006D25069BE5C46C4B5C5A8B2165E31C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71
C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71
C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71
C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71
C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C71C7

111111111111111111111111111111111111111111111011111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111
111111111111111111111111111111111111111111111111111111111111111111111111 is prime


On Monday, December 27, 2021 at 5:01:32 AM UTC-5, Janis Papanagnou wrote:

Subject: Re: obfuscated AWK code challenge

It's arguable whether it's appropriate to call code an "AWK code
challenge" that obviously relies on external commands like 'od',
'openssl', and various shell commands _within_ the awk code.

Janis
On 27.12.2021 03:53, RARE Kpop Manifesto wrote:

without actually running this code, can you figure out which prime number has been encoded within the input of ASCII letters

[ Mcb ]

plus the trick that allowed me to achieve such a compression ratio.

* The code works equally well in gawk, mawk-1, mawk2, and nawk.
It is ENTIRELY self-encapsulated.

Enjoy !

= === === === === === === === === === === === === ==

echo; cmd=' echo Mcb | mawk2 '\''function _________(__,_,___) { (___="bc <<< \"obase="(_*=_^=_+=++_)"; "(__)" ;\"")|getline _; close(___); return _ } BEGIN {_____="%c";for(_-=(___-=(_=(_*=_*=_*=_+=++_)))^!_;-""<=_;_--) {__[sprintf(_____,___-+-_)]=_};

for(_ in __) { __[_] } } {____=+""; for(_=_____=length($(____));_;_--) { ___=__[substr($(____),_,!!_)]___ }; ______=___%(_____=((!-"")(-""))^(_____*=(_^=_=-"")^-!-""));_______=int(___/_____);___="%*.f"; ________=sprintf((___"_")___,--_______,!_,--______+-
+_______,!___); gsub(/[^_]/,_^!_,________); sub(/[_]/,+"",________); sub(/..$/,"",_____);_____+=_="";_+=_^=_; printf(" log-base-"(_)" :: %."(_^_^_)"g%c%c %c digits in decimal :: %d%c%c 0x %s%c%c",log(_)^(_/-_)*(log((".")(________))+log(_____)*(___=length(
________))), _____, _____,_^_*_____-_^-!!_*_____,___,_____,_____, _________(________), _____,_____); system("openssl prime -checks "(_+=_*=(_^=_)*_)" "(________)) }'\'' '; gprintf '\n%s\n\n' "${cmd}" ; echo; eval "${cmd}"


--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 17.01.2022 11:28, Kpop 2GM wrote:

@Janis Papanagnou : if u want a pure awk code challenge, tell me what output comes out of this :

mawk _^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^-_^_^_^_^_^_^_^_^_^_^_^_^_^--_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_

From a quick glance it seems only half of what is produced by either of

awk 'Doh! Uh - oh, oh no; no! (not again)'

awk 'Doh! Uh - oh, oh no; no! (not again) - Unclear?! then say: "bye"'


Janis

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

@Janis Papanagnou : if u want a pure awk code challenge, tell me what output comes out of this :

mawk _^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^-_^_^_^_^_^_^_^_^_^_^_^_^_^--_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Mon, 17 Jan 2022 02:28:27 -0800 (PST), Kpop 2GM
<jason.cy.kwan@gmail.com> wrote:

@Janis Papanagnou : if u want a pure awk code challenge, tell me what
output comes out of this :

mawk _^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^-_^_^_^_^_^_^_^_^_^_^_^_^_^--_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_

Absolutely nothing if you don't supply an input, and even then I doubt it produces any output at all.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 17.01.2022 12:03, pk wrote:

On Mon, 17 Jan 2022 02:28:27 -0800 (PST), Kpop 2GM
<jason.cy.kwan@gmail.com> wrote:

@Janis Papanagnou : if u want a pure awk code challenge, tell me what
output comes out of this :

mawk
_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^-_^_^_^_^_^_^_^_^_^_^_^_^_^--_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_

Absolutely nothing if you don't supply an input, and even then I doubt it produces any output at all.

Careful! - You have a variable named _ and it has a value in numeric
context of 0, then you have these cascades of power 0^0 which results
in 1, and some arithmetic in between (- and - -), that effectively
seems to result in 1, meaning an awk condition 'true', and that the
input is therefore just reproduced in the output. (Just an educated
guess, no analysis done.)

Janis

--- SoupGate-Win32 v1.05
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On Monday, January 17, 2022 at 5:54:28 AM UTC-5, Janis Papanagnou wrote:

On 17.01.2022 11:28, Kpop 2GM wrote:

@Janis Papanagnou : if u want a pure awk code challenge, tell me what output comes out of this :

mawk _^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^-_^_^_^_^_^_^_^_^_^_^_^_^_^--_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_

From a quick glance it seems only half of what is produced by either of

awk 'Doh! Uh - oh, oh no; no! (not again)'

awk 'Doh! Uh - oh, oh no; no! (not again) - Unclear?! then say: "bye"'

Janis

it's actually really straight forward - that code simply prints everything except first line.

here's another pure awk one for u : what does this perform :

mawk -F= 'BEGIN {_+=(_^=__=_+=++_+_)-_/_} $!!_=$!_=$(__+(_<=+$!_)*NF)'

--- SoupGate-Win32 v1.05
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but i also found the absolutely shortest syntax possible to utilize gawk's hex decoder and print out decimals, assuming the input is just rows of 0x….. :

gawk -n '($!_=+$_)~_'
or
gawk -nM '($!_=+$_)~_' (if you need higher than double precision)

need to append my statement - the same code also works for octals-to-decimals.

echo 025333523235356512534543125646531264523653261 | gawk -nM '($!_=+$_)~_'

1822980154315230596830091282486207141553

basically anything in the same standardized format accepted by strtonum( ) would work, without having to call that function, or even use the print statement, and without even having to type in any numbers at all in the code.

--- SoupGate-Win32 v1.05
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On Monday, January 17, 2022 at 6:14:48 AM UTC-5, Janis Papanagnou wrote:

On 17.01.2022 12:03, pk wrote:

On Mon, 17 Jan 2022 02:28:27 -0800 (PST), Kpop 2GM

@Janis Papanagnou : if u want a pure awk code challenge, tell me what
output comes out of this :

mawk
_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^-_^_^_^_^_^_^_^_^_^_^_^_^_^--_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_

Absolutely nothing if you don't supply an input, and even then I doubt it produces any output at all.

Careful! - You have a variable named _ and it has a value in numeric
context of 0, then you have these cascades of power 0^0 which results
in 1, and some arithmetic in between (- and - -), that effectively
seems to result in 1, meaning an awk condition 'true', and that the
input is therefore just reproduced in the output. (Just an educated
guess, no analysis done.)

Janis

those cascading 0^0, and one single negation and one single pre-decrement were absolutely intentional.that wasn't a typo.

but i also found the absolutely shortest syntax possible to utilize gawk's hex decoder and print out decimals, assuming the input is just rows of 0x….. :

gawk -n '($!_=+$_)~_'
or
gawk -nM '($!_=+$_)~_' (if you need higher than double precision)

--- SoupGate-Win32 v1.05
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the posix flag -P is similar as the -n (nondecimal) flag in the sense it can interpret hex and octals, but only realistically up to 2^53 since -P flag doesn't pair well with bignum flag -M - it wouldn't print out an error message, but the -P flag gets
nullified by -M flag

the easiest way i found to detect whether an innovation of any variant of awk is in gawk -P mode is

("<"<"\x3c")

\x3C is the hex code for byte "<", so this boolean criteria fails for everyone else since one cannot be less than one-self, except gawk -P, which ignores the hex notation, and compares "<" (\074) against "x" (\170)

--- SoupGate-Win32 v1.05
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On 20.01.2022 22:12, Kpop 2GM wrote:

On Monday, January 17, 2022 at 5:54:28 AM UTC-5, Janis Papanagnou wrote:

On 17.01.2022 11:28, Kpop 2GM wrote:

@Janis Papanagnou : if u want a pure awk code challenge, tell me what output comes out of this :

mawk _^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^-_^_^_^_^_^_^_^_^_^_^_^_^_^--_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_

From a quick glance it seems only half of what is produced by either of

awk 'Doh! Uh - oh, oh no; no! (not again)'

awk 'Doh! Uh - oh, oh no; no! (not again) - Unclear?! then say: "bye"'


Janis

it's actually really straight forward - that code simply prints everything except first line.

Not in my book, not in my system environment. And certainly not as
designed and intended.

Does it really do that in your environment?
Have you tried other awks than mawk?

And it's much less straightforward than your previously posted code.

Your code had just one type of obscurity; a uninitialized untypical
variable _ used that gets a default value in an expression that has
just be copied many many times. Any maybe the decrement operator can
be considered tricky because it requires an lvalue not a value, but
that's standard in C based programming languages.

In my code you find various concepts; lots of implicit forth and back conversions between strings and integers, grouping, arithmetic and
negations, string constants, a range operator, and last but not least
even a ternary operator. All grouped like a sentence.

Spoiler; it should effectively evaluate to awk '1;1' thus, as noted, duplicating every input line. (I wrote "[your code produces] half of
what is produced by [my code]", and I meant that literally since your
code produces the same as awk '1'.)

Janis

here's another pure awk one for u : what does this perform :

mawk -F= 'BEGIN {_+=(_^=__=_+=++_+_)-_/_} $!!_=$!_=$(__+(_<=+$!_)*NF)'

--- SoupGate-Win32 v1.05
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On 20.01.2022 22:16, Kpop 2GM wrote:

On Monday, January 17, 2022 at 6:14:48 AM UTC-5, Janis Papanagnou wrote:

On 17.01.2022 12:03, pk wrote:

On Mon, 17 Jan 2022 02:28:27 -0800 (PST), Kpop 2GM

@Janis Papanagnou : if u want a pure awk code challenge, tell me what
output comes out of this :

mawk
_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^-_^_^_^_^_^_^_^_^_^_^_^_^_^--_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_

Absolutely nothing if you don't supply an input, and even then I doubt it >>> produces any output at all.

Careful! - You have a variable named _ and it has a value in numeric
context of 0, then you have these cascades of power 0^0 which results
in 1, and some arithmetic in between (- and - -), that effectively
seems to result in 1, meaning an awk condition 'true', and that the
input is therefore just reproduced in the output. (Just an educated
guess, no analysis done.)

Janis

those cascading 0^0, and one single negation and one single pre-decrement were absolutely intentional.that wasn't a typo.

I didn't say or meant it was a typo. That's just "some arithmetic",
as also said in my other recent post. You used arithmetic, ^, -, --,
and a variable _ , that's all WRT complexity, the duplication doesn't
really contribute.

BTW, in my other post I forgot to mention one more trick in your code;
one should be aware that the exponentiation has right-associativity
(right grouping expression) and the evaluation of the subexpression
toggles between 0 and 1, so if you reduce the expression you have to
do that pair-wise to decompose that correctly.

_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_

is equivalent to either of

_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_ _^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_ _^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_^_
...
_^_^_^_
_^_

but i also found the absolutely shortest syntax possible to utilize
gawk's hex decoder and print out decimals, assuming the input is just rows of 0x….. :

gawk -n '($!_=+$_)~_'
or
gawk -nM '($!_=+$_)~_' (if you need higher than double precision)

With my version of GNU awk this code just reproduces the input.

Want to provide test samples?

Janis

--- SoupGate-Win32 v1.05
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try this one :

echo '0xCAFEBEEFFEED' | gawk -n '($!_=+$_)~_'
223195473903341

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nawk is slightly more verbose :

echo '0xCAFEBEEFFEED' | nawk '($!+_=+$+_)~_'
223195473903341

echo '0xCAFEBEEFFEED' | mawk '($!_=+$_)^_' OFMT=%.f
223195473903341

echo $'0x0\n0xFEEDCAFEBEF' | mawk '($!_=+$_)<"_"' OFMT=%.f
0
17518579149807

echo '0xCAFEBEEFFEEDCAFEBEEFFEEDCAFEBEEFFEEDCAFEBEEFFEEDCAFEBEEFFEEDCAFEBEEFFEEDCAFEBEEFFEEDCAFEBEEFFEEDCAFEBEEFFEEDCAFEBEEFFEEDCAFEBEEFFEED' | gawk -nM '($!+_=+$+_)~_'

696760147094848118127845202403676761678558245541567696744233608423914272675373998167144529865231202819614166286871620170316927958511530298151998159289949617901

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echo '0xCAFEBEEFFEED' |gawk -p- -P '($!+_=+$+_)~_'
223195473903341
# gawk profile, created Fri Jan 21 01:12:16 2022

# Rule(s)

1 ($! +_ = +$+_) ~ _ { # 1
1 print
}

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i've been building this huge library for my own use, and to ensure it's as portable as possible, i test the library against mawk 1.3.4, mawk1.9.9.6, gawk in unicode mode, gawk in byte mode, and nawk (or whatever proper name of that awk is that comes with
macos at /usr/bin/awk)

from either pre-compiled binaries at homebrew, or just a straight up "make" using mawk-2's source code.

as a result, the library practically has nothing gawk specific at all, but the library also auto-detects which variant I invoked it with based on built-in behavior of the awk itself that cannot simply be tricked by hardcoding in a constant, or setting a
variable somewhere, shell or inside awk :

e.g. this criteria (+"0x1" * 0x1)

every other awk and every other invocation flag of gawk would produce a zero, EXCEPT gawk -n / gawk -n -M

or this one : (+"")^atan2(+"",-log(+!+""))

every other awk and every invocation flag of gawk would produce a zero, EXCEPT nawk

i made this next criteria to quickly identify a few different variants/gawk flags, although not all of them are unique :

'BEGIN {
print \
-log((log(-"")*log(-""))^-log(-""))\
/(-"0xABCD")^-!-"" }'

mawk inf
mawk2 nan
nawk inf
gawk -P -e +inf
gawk -c -e +nan
gawk -e +nan
gawk -M -e -nan
gawk -n -e +inf

just gawk alone, you can get it to print out either positive Infinity, negative NaN, or positive NaN, depending on which flags.

--- SoupGate-Win32 v1.05
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to check for mawk-2, it's

("\333\222"~"[^\333\222]")

it's a bug that only shows up in mawk-2. run it in gawk unicode mode or gawk byte mode, it's still a false.

or simply checking using hex decoding, one can split out 4 different invocation flags of gawk :

% gawk -n -e 'BEGIN { print +0xDEAD,+"0xCAFE" }'
57005 51966

% gawk -t -e 'BEGIN { print +0xDEAD,+"0xCAFE" }' (same for just -e)
57005 0

% gawk -P -e 'BEGIN { print +0xDEAD,+"0xCAFE" }'
0 51966

% gawk -c -e 'BEGIN { print +0xDEAD,+"0xCAFE" }'
0 0

--- SoupGate-Win32 v1.05
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i found you a great test case : it's a pair of hex that's horizontal mirrors of each other, and both are prime. As you can see here, the same syntax works across mawk-1, nawk, and gawk -n :

mawk '($!+_=$+_=($+_)(":")(+$+_))~_' CONVFMT=%.f <<< $'0x11111BBBBFFF\n0xFFFBBBB11111' | ecp

0x11111BBBBFFF:18765177405439
0xFFFBBBB11111:281456650817809

nawk '($!+_=$+_=($+_)(":")(+$+_))~_' CONVFMT=%.f <<< $'0x11111BBBBFFF\n0xFFFBBBB11111' | ecp

0x11111BBBBFFF:18765177405439
0xFFFBBBB11111:281456650817809

gawk -n '($!+_=$+_=($+_)(":")(+$+_))~_' CONVFMT=%.f <<< $'0x11111BBBBFFF\n0xFFFBBBB11111' | ecp

0x11111BBBBFFF:18765177405439
0xFFFBBBB11111:281456650817809

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apparently even aligning decimals on the right hand side doesn't require a printf( ) statement :

mawk '_<($(_^_+!_)=+$+_)' CONVFMT=%20.f <<< $'0x0\n0x11111BBBBFFF\n0xFFFBBBB11111'

0x11111BBBBFFF 18765177405439
0xFFFBBBB11111 281456650817809

--- SoupGate-Win32 v1.05
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apparently even right-aligning of decimals doesn't require a printf( ) statement :

mawk '($(_^_+!_)=+$+_)^_' CONVFMT=%20.f <<< $'0x11111BBBBFFF\n0xFFFBBBB11111' | gtr ' ' '.'

0x11111BBBBFFF.......18765177405439
0xFFFBBBB11111……281456650817809

(it looks screwy here since default google font isn't fixed width)

or with built-in vertical separation :

mawk '($(_^_+!_)=+$+_)<"~"' CONVFMT=%.f OFS="\f" <<< $'0x11111BBBBFFF\n0xFFFBBBB11111'

0x11111BBBBFFF
18765177405439
0xFFFBBBB11111
281456650817809

--- SoupGate-Win32 v1.05
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On 21.01.2022 07:03, Kpop 2GM wrote:

try this one :

echo '0xCAFEBEEFFEED' | gawk -n '($!_=+$_)~_'
223195473903341

Not for me...

$ echo '0xCAFEBEEFFEED' | gawk -n '($!_=+$_)~_'
0xCAFEBEEFFEED


BTW, I skip/skipped your many posts from the last two days; I find it inconvenient to get fragmentary thoughts spread over many postings.
(Maybe I read them later or maybe not.)

But, for a change, I like your idea of an awk code challenge and will
open a new thread with another one.

Janis

--- SoupGate-Win32 v1.05
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BTW, I skip/skipped your many posts from the last two days; I find it inconvenient to get fragmentary thoughts spread over many postings.
(Maybe I read them later or maybe not.)

it's not that i enjoy fragmentation (maybe it's just a manifestation of my ADHD). this, being a good ole' newsgroup, means I couldn't go edit existing posts. the only other option being i copy-over full text of existing to a new post, plus the amendment(
s), then deleting the old post (and repeating that cycle numerous times). I'll do it if that's your preference.

--- SoupGate-Win32 v1.05
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this is what my gawk looks like with minor variations each time :

% echo '0xCAFEBEEFFEED' | gawk -n '$1=$0=$0'
0xCAFEBEEFFEED
(as expected)

% echo '0xCAFEBEEFFEED' | gawk -n '$1=$0'
0xCAFEBEEFFEED

% echo '0xCAFEBEEFFEED' | gawk -n '$1=$0=$0'
0xCAFEBEEFFEED

% echo '0xCAFEBEEFFEED' | gawk -n '$1=$0=+$0'
223195473903341

% echo '0xCAFEBEEFFEED' | gawk -P '$1=$0=+$0'
223195473903341

% echo '0xCAFEBEEFFEED' | gawk -P '$1=+$0'
223195473903341

% echo '0xCAFEBEEFFEED' | gawk -P '$1=+$1'
223195473903341

it's quite baffling to me why your gawk acts like that, seeing that on gnu.org, they list gawk 3.1 as first time it contains ability to interpret hex, which is quite some time ago. I got the exact same syntax working in gawk 5.1.1, mawk 1.3.4, and macos
nawk to go from hex-to-decimal, so if you're still stuck I don't know what else I could suggest to workaround it other than doing it the old fashion verbose way of strtonum( ), e.g.

echo '0xCAFEBEEFFEED' | gawk -e '$!_=$_=strtonum($_)'
223195473903341

<<< '0xCAFEBEEFFEED' gawk -e '($!_=strtonum($_))^_'
223195473903341

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@Janis : i wasn't even intentally obfuscating code for others. I write code directly in that style. like this function here, performs arbitrary-length big-integer multiplication

function _x_(_,__,___,____,_____,______,_______,
________,_________,__________,___________) {
if ((_=="")||(__=="")) {
if (__=="") {
return _ };_=__}
_____="^[-]";________=substr("-",!-"",\
sub(_____,"",_)!=sub(_____,"",__))
sub(/[-]/,"+",_____)
sub(_____,"",_)-sub(_____,"",__)
_______="^["(+"")"]+";
sub(_______,"",_)-sub(_______,"",__)
if (_~(_______="^"(!-"")"?$")) {
return (________)(_?__:_)
} else if (__~_______) {
return (________)(__?_:__) }
_______=""; gsub(/./,+"",_____)
_=(_____)_; gsub(/./,".",_____)
sub("("(_____)")+$","_&",_)
sub("[^_]*[_]","",_)
_________=___*=___=length(_____)
___-=match(___,"$")
if(((_____=(__________=length(_))+ \
(___________=length(__)))<_________)\
|| (_________==_____\
&& (_*__)<(_________^___))) {
return ________?-_*__:_*__;
};_________-=--___;___=\
__________;____=___________;
split(genZeros(_____),______,//);
_____-=!!_+!!_;_____-=_________;
___________-=_________;
for(___^=!___;___<__________;___+=_________) {
_______=+substr(_,___,_________++);
for(____=___________;-_________<____;\
____-=_________) {______[\
_____-___-____]+=_______*(((\
!___<____)||FLG_AWK_MAWK_2)\
? substr(__,____,_________)\
: substr(__,___^!___,\
____+_________-___^!___))
};--_________};_______=\
___^=_____=+(___=____=_____="")
_______=length(______)+(_^=_="")
_^=_="";_+=_+=_-+-++_;
while(___<_______) {____=(\
(_____+=______[___++])%_)____;
_____=int(_____/_) }
sub("^"(!_)"*",________,____); return ____ }

then i use this next one to convert arbitrary sized integers to hex :

function int2hex(_______,______________, _____________,____________,___________,
__________,_________,________,______,
_____,____,___,__,_) {
___________=((_____=((__+=++__)\
)^__)^((__^(__*__)-++__)))*_____;
______________=(__^--__+--__)^(++__)^++__;
___________/=(______=(++__)^(__*=__))
__="";
sub(/^[+-]?[0]*/,"",_______)
sub(/[.][[:digit:]]*$/,"",_______)
if (_______=="") {
return "0x0" }
if (length(_______)<((__+=++__)^__^__)) {
if (_______~/^[0-9]$/) {
return ("0x")(+_______) }
#$if (_______<((___=_____*_____)+___))
__=sprintf("%X%.8X",int(\
_______/______),_______%______)
sub(/^0*/,"0x",__); return __;
}
split("",_);_____=__^=__^=__/__+__;
__=(__=".")__;
gsub("",__,__)
sub("("(__)")+$","_&",_______)
gsub(".","[^_]",__)
___=__=gsub(__,"&_",_______)
____=+"";
while(_______) {
________=(____=____*\
______________+_______)%_____;
_[__--]=int(____/_____)
____=________;
_______=substr(_______,\
index(_______,"_")+!+"") }
_______=sprintf("%.6X",____%_____)
_____+=_____+=_____;
__=____="";__________=-(__^__)
while(___) {
if(_[___]==(____=+"")) {
delete _[___--] }
if(!___) {
break }
for(__=___;-""<=__;__--) {
________=(____=____*\
______________+_[__])%_____;
_[__]=int(____/_____)
____=________ }
if (__________<-"") {
__________=+____
} else {_______=( !FLG_AWK_MAWK_1 \
? sprintf("%.13X",____*_____+__________)\
: sprintf("%.5X%.8X",int((__________+=\
____*_____)/______),__________%______))_______;
__________=-!!______;
} }
_______=sprintf("%X%08X",int((__________=\
__________<-""?____+_[___]:__________+\
_____*(____+_[___]))/______),\
__________%______)_______;
sub(/^0*/,"0x",_______); return _______ };

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