Use base-91 instead of base-60.

We're now using base-91, which is from character '#' to '~', excluding
the backslash.

1 files changed, 57 insertions, 22 deletions

diff --git a/challenge-004/abigail/perl/ch-1.pl b/challenge-004/abigail/perl/ch-1.pl
index c6333723dd..a36eb78e42 100644
--- a/challenge-004/abigail/perl/ch-1.pl
+++ b/challenge-004/abigail/perl/ch-1.pl
@@ -17,40 +17,75 @@ use experimental 'lexical_subs';
 # Run as: perl ch-1.pl
 #
 
+################################################################################
+#
+# We have encoded the digits of perl. We're grouping the digits (after
+# the decimal dot), in groups of 9, considering this as a base-10 number,
+# and then we turn this into a base-91 number. To represent the base-91
+# number, we are using ASCII characters, starting from "#", up to "~",
+# *BUT* skipping "\".
+#
+# We can encode a 9 digit base-10 number with 5 characters in base-91,
+# giving us a 44.44% reduction in size.
+#
+################################################################################
+
 my $first_ord  = 1 + ord ('"');
-my $range      = 60;
+my $skip_ord   = ord ("\\");
+my $last_ord   = ord ("~");
+my $range      = $last_ord - $first_ord;
+my $in_size    = 5;
+my $out_size   = 9;
 
 print "3.";
 while (<DATA>) {
-    foreach (/.{6}/g) {
+    my $pat = ".{$in_size}";
+    foreach (/$pat/g) {
         my $out = 0;
         foreach (/./g) {
             $out *= $range;
-            $out += ord () - $first_ord;
+            my $n = ord ();
+               $n -- if $n >= $skip_ord;
+            $out += $n - $first_ord;
         }
-        print $out;
+        printf "%0${out_size}d" => $out;
     }
 }
-print "\n"
+print "\n";
 
 #
-# Encoded digits of PI below __DATA__
-# Encoding is in base-60; from character '#'
+# FODDER FODDER FODDER FODDER FODDER FODDER FODDER
+# FODDER FODDER FODDER FODDER FODDER FODDER FODDER
 #
 
 __DATA__
-$T2/ZF.CU[H=&:\X*^)?$KCV+Z@7<-*@+\@'*H$J@;#SA3Y^.(OG7<':]P.6
--DVB4B'02VUR$/;J?2)A4L^C)XC'?S).0\8M-S[=,X-\@DP^+4:J5,*&UN[G
-(LNP32+DU2*L&JN-0N'W.;/P&@2II.(W0FOW'>#*[U(UDI?%$N7OIQ#60<YD
-,6(LL)#SNX#4)3JI%#/9Z<M7.RKT#G-+^Q/K#+ODLP)3M''/$QS(2V/)?A$E
-'2'4AG*;;QJ0$.*WCX-C.PW^&^FCZS#\>6[J+'-NC2%<A7/'.>KD,L-KB>?C
-/IQ2[%(K#Q0U.&ON.E+0>B5\%>+S3I*U1KH\#LG9C[&Q/^W&-X854=,VQA5W
-##=5*V(T28+%-#P12M,OMV+.,?.4./$X572$%XEAI8(^-O%4$8'QOJ+VU+*2
-(;0L#.%O3E^7.)LFG8*LB@M\)+,:WK)K108X)<S+UH&TR3(V#Q(8?S%'.^\J
-)>L:-Z'>KE-=(?)20P'5'J-F&9)=I$,*Z#(0-'UB8=*D7GL:-?1NSH,VP5LN
-*LGZ2'&LWN$0$@?7RN.7TMOF/&:L%]%:7U+W%/*-$)$K6;JR+A*:5@%Q^>0,
-'X[LF7$9/S4N&F->G$)VXSD3-F&1^/#>17M,+W9@3%&7E6;V&/L.FW-O*OPV
-*-,B>9(U<@MJ)C/.?B+T>2AZ.=#X&&-AT9,))8*0*F#QG784#/XKBK/J[;=W
-.%5\R2+.E40A)&=:W9/47DX,)#VQFO/,$Z9^,\Q^$.#B0VB'*^#\;O&6X\?C
-/##QF%.DG=LO,K96%T+@=LGN-?W9IB&2AK(#'EFPDO,I<XL&.P;%<=#C[S\^
-+N6R=8+-OWG\%Q^'^W(XW[:U&KT/M<*,U,N&-[44:+*CWCP[.LFZV6,J<4@2
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+*O/.v,Jc~D+ttA'&EPjR(zXxD$dr,M$P=-f*YQqe,GIZ`0x5oL1(mpl17en`
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+&=aag,L-UG#HoAx/=@p,&ux{:0($3X*[J<4,eh{E1F&tE$cGo.&C}15*:u{Z
+,:*H^'f,=~$,z%B)WZbL$DjA;/oFKa%.>ig/^o.90e/P=*Auex0TD}p/hncA
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+'S/z}#vS|i)S9[=*/nCG)PMaY-{pML);vN?%kRcr#*.Tg,x;42'(1w.0dA)S
+)-us%.#1$R-rkwf%m%B-(ctK8+4Sn^%*C1Y-wqsr%eNg11%$De&&07q+%1>-
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