From 9b2c0ed2b15fac1b279a7b07ae7fef139cc032de Mon Sep 17 00:00:00 2001
From: Cody Boone Ferguson <53008573+xexyl@users.noreply.github.com>
Date: Fri, 27 Oct 2023 12:37:56 -0700
Subject: [PATCH] Add files from 2020/endoh2 password-protected zip

The password was no longer known as the link that had a list of
passwords as provided by Yusuke in 2020 was no longer there, being
instead from 2021. I didn't have to use the Internet Wayback Machine as
I had already extracted them in the 2020 preview back then. The
spoiler/spoiler.md has been format fixed.

The spoiler.zip file has been deleted. The README.md file has been fixed
to refer to the directory, not the zip file, and a missing '`' was added
to the file that prevented proper rendering of the html.
---
 2020/endoh2/README.md          |  11 +-
 2020/endoh2/spoiler.zip        | Bin 3810 -> 0 bytes
 2020/endoh2/spoiler/code.c     |  91 ++++++++++++++
 2020/endoh2/spoiler/gen.rb     |  42 +++++++
 2020/endoh2/spoiler/glyphs.txt | 209 +++++++++++++++++++++++++++++++++
 2020/endoh2/spoiler/prog.c     |  28 +++++
 2020/endoh2/spoiler/spoiler.md |  19 +++
 2020/endoh2/spoiler/tmpl.txt   |  28 +++++
 thanks-for-fixes.md            |   5 +
 9 files changed, 428 insertions(+), 5 deletions(-)
 delete mode 100644 2020/endoh2/spoiler.zip
 create mode 100644 2020/endoh2/spoiler/code.c
 create mode 100644 2020/endoh2/spoiler/gen.rb
 create mode 100644 2020/endoh2/spoiler/glyphs.txt
 create mode 100644 2020/endoh2/spoiler/prog.c
 create mode 100644 2020/endoh2/spoiler/spoiler.md
 create mode 100644 2020/endoh2/spoiler/tmpl.txt

diff --git a/2020/endoh2/README.md b/2020/endoh2/README.md
index 40324d91c..95077d875 100644
--- a/2020/endoh2/README.md
+++ b/2020/endoh2/README.md
@@ -26,15 +26,16 @@ make
 ./prog yoda.txt
 
 ./prog bear.txt
-``
+```
 
 ## Judges' remarks:
 
-Clever use of the C99 complex data type. The spoiler.zip file contains clues
-as to how some winning authors create / edit programs into ASCII shapes.
+Clever use of the C99 complex data type. The [spoiler](spoiler/) directory
+contains clues as to how some winning authors create / edit programs into ASCII
+shapes.
 
-With the source from the spoiler.zip file could you make the code render for a
-larger terminal window?  How about adding more glyphs?
+With the source from the [spoiler](spoiler/) directory could you make the code
+render for a larger terminal window?  How about adding more glyphs?
 
 ## Author's remarks:
 
diff --git a/2020/endoh2/spoiler.zip b/2020/endoh2/spoiler.zip
deleted file mode 100644
index 29b5418074142cdc260f235e56d6542b338c937c..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/2020/endoh2/spoiler/code.c b/2020/endoh2/spoiler/code.c
new file mode 100644
index 000000000..153dafb38
--- /dev/null
+++ b/2020/endoh2/spoiler/code.c
@@ -0,0 +1,91 @@
+int*d,D[9999],N=20,L=4,n,m,k,a[3],i;
+char*p,*q,S[2000]="L@X-SGD-HNBBB-AD-VHSG--XNT\x1b[2J\x1b[H",*s=S,*G="GLYPHS";
+#include<complex.h>
+typedef/**/complex/**/double(c);c(X)[3],P,O;
+c/**/B(double t){
+    double s=1-t,u;
+    P=s*s*X[1]+2*s*t**X+t*t*X[2]+O;
+    u=I*P;
+    return+48*((s=P)+48*I)/(1<u?u:1);
+}
+#include<stdio.h>
+void/**/b(double t,double u){
+    double s=P=B(t)-B(u);
+    (s=P*(2*s-P))<1?
+        m=P=B((t+u)/2),k=-I*P,
+        m>-41&&m<39&&9<k&&k<48?
+            m+=k/2*80+73,
+            S[m]=S[m]-73?k%2?S[m]-96?95:73:S[m]-95?96:73:73
+        :
+            1
+    :
+        (
+            b(t,(t+u)/2),
+            b((t+u)/2,u),
+            0
+        );
+}
+#include<time.h>
+int(main)(int(x),char**V){
+    clock_t(c)=clock();
+    // default message
+    for(d=D;m<26;m++,s++)
+        *s>63?
+            *d++=m%7*16-7*8,*d++=m/7*25,*d++=*s-64
+        :
+            0;;
+    if(V[1]){
+        // read a given file
+        ;;;FILE*F=fopen(V[+1],"r");
+        for(d=D,L=N=m=0;(x=fgetc(F))>0||fclose(F);)
+            if(
+                x>13?
+                    64<x&&x<91?
+                        *d++=m*16,
+                        *d++=L*25,
+                        *d++=x%26
+                    :
+                        0,
+                    m++,
+                    0
+                :
+                    1
+            )
+                for(++L;d-D>N*3||(m=0);N++)D[N*3]-=m*8;
+    }
+    for(;i<200+L*25;i++){
+        // clear the screen
+        for(n=0,p=S+33;n<1920;*p++=n++%80>78?10:32){}
+        // render the message
+        for(*p=x=0,d=D;x<N;x++,d+=3){
+            O=(d[1]-i-40)*I+*d;
+            // render a letter
+            n=d[2];
+            p=G;
+            for(;n--;)for(;*p++>33;);
+            *a=a[1]=*p++;
+            for(;*p>33;p++)
+                if(
+                    *p%2?
+                        *a=*p,0
+                    :
+                        1
+                ){
+                    a[2]=*p;
+                    for(m=0;m<3;m++){
+                        // calculate the point on the load
+                        k=a[m]/2-18;
+                        q="POINTTABLE";
+                        for(n=POINTSTART;k--;)n+=*q++-34;
+                        X[m]=n%XMAX+n/XMAX*I;
+                    }
+                    // bezier
+                    b(0,1);
+                    *a=a[1]=*p;
+                }
+        }
+        // show and wait
+        for(puts(s),s=S+30;(clock()-c)*10<i*CLOCKS_PER_SEC;);
+    }
+    return 0;
+}
diff --git a/2020/endoh2/spoiler/gen.rb b/2020/endoh2/spoiler/gen.rb
new file mode 100644
index 000000000..bd6260b0d
--- /dev/null
+++ b/2020/endoh2/spoiler/gen.rb
@@ -0,0 +1,42 @@
+Xmax = 13
+Ymax = 21
+
+glyphs = {}
+
+points = []
+open("glyphs.txt") do |f|
+  while ch = f.gets
+    ch = ch.to_i
+    glyphs[ch] = []
+    while pnt = f.gets
+      break if pnt.chomp == ""
+      x, y, c = pnt.split(",").map {|s| s.to_i }
+      points << (y * Xmax + x)
+      glyphs[ch] << [y * Xmax + x, c == 1]
+    end
+  end
+end
+points = points.sort.uniq
+glyphs.each do |ch, pnts|
+  pnts.map! do |pnt, c|
+    points.index(pnt) * 2 + (c ? 1 : 0) + 36
+  end
+end
+pointtable = points.each_cons(2).map {|a, b| b-a+34 }.pack("C*")
+s = []
+glyphs.values.each do |points|
+  s += points
+  s << 33
+end
+s.pop
+glyphs = s.pack("C*")
+
+src = File.read("code.c")
+src = src.gsub(/\/\/.*/, "")
+src = src.lines.map {|n| n.strip }.join
+src = src.gsub("POINTTABLE") { pointtable }
+src = src.gsub("POINTSTART") { points.first }
+src = src.gsub("GLYPHS") { glyphs }
+src = src.gsub("XMAX") { Xmax }
+src = File.read("tmpl.txt").gsub(/[#!]/) { src.slice!(0, 1) }
+File.write("prog.c", src)
diff --git a/2020/endoh2/spoiler/glyphs.txt b/2020/endoh2/spoiler/glyphs.txt
new file mode 100644
index 000000000..fcb2aeb87
--- /dev/null
+++ b/2020/endoh2/spoiler/glyphs.txt
@@ -0,0 +1,209 @@
+65
+1,16,0
+6,2,0
+11,16,0
+9,11,0
+3,11,0
+
+66
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+2,15,0
+2,2,0
+
+67
+10,3,0
+2,0,1
+2,8,0
+2,16,1
+10,13,0
+
+68
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+10,1,1
+10,8,0
+10,16,1
+2,15,0
+2,2,0
+
+69
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+2,8,0
+8,8,0
+2,8,0
+2,15,0
+10,15,0
+
+70
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+2,2,0
+2,8,0
+8,8,0
+2,8,0
+2,15,0
+
+71
+10,3,0
+2,0,1
+2,8,0
+2,16,1
+6,16,0
+11,16,1
+10,10,0
+6,10,0
+
+72
+2,2,0
+2,15,0
+2,8,0
+10,8,0
+10,2,0
+10,15,0
+
+73
+3,2,0
+9,2,0
+6,2,0
+6,15,0
+3,15,0
+9,15,0
+
+74
+6,2,0
+11,2,0
+9,2,0
+9,13,0
+6,19,1
+3,13,0
+
+75
+2,2,0
+2,15,0
+2,10,0
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+4,8,0
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+
+76
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+
+77
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+
+78
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+
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+
+80
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+
+81
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+
+82
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+10,15,0
+
+83
+10,3,0
+6,1,1
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+12,11,1
+9,15,0
+6,16,1
+2,14,0
+
+84
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+6,2,0
+6,16,0
+
+85
+2,2,0
+1,16,1
+6,16,0
+11,16,1
+10,2,0
+
+86
+2,2,0
+6,15,0
+10,2,0
+
+87
+1,2,0
+3,15,0
+6,4,0
+9,15,0
+11,2,0
+
+88
+2,2,0
+10,16,0
+6,9,0
+10,2,0
+2,16,0
+
+89
+2,1,0
+6,9,0
+6,16,0
+6,9,0
+10,1,0
+
+90
+2,2,0
+10,2,0
+2,15,0
+10,15,0
+
diff --git a/2020/endoh2/spoiler/prog.c b/2020/endoh2/spoiler/prog.c
new file mode 100644
index 000000000..861723e70
--- /dev/null
+++ b/2020/endoh2/spoiler/prog.c
@@ -0,0 +1,28 @@
+              /* A long time ago in a galaxy far, far away.... */
+
+int*d,D[9999],N=20,L=4,n,m,k,a[3],i;char*p,*q,S[2000]="L@X-SGD-HNBBB-AD-VHSG-\
+-XNT\x1b[2J\x1b[H",*s=S,*G="r2zZX!.+@KBK^yh.!:%Bud!.+Jyh.!6.BHBhp!6.BHBh!:%Bu\
+v{VT!.hBJ6p!042ljn!284b}`!.hR6Dp!.hp!h.T6p!h.p6!2/LilqP72!h.+@QB!~}lqP72/Lil!\
+h.+@QBFp!:)0?F]nwf!,82v!.sv{6!.l6!,j<n8!.xN6t!&NvN*!.6hp";/*Stay_on_target.**/
+#include/**/<complex.h>/**//*Oh,my_dear_friend.How_I've_missed_you.--C-3PO***/
+typedef/**/complex/**/double(c);c(X)[3],P,O;c/**/B(double t){double s=1-t,u;P=
+s*s*X[1]            +2        *s*t*        *X+t        *t*X       [2]+O;u=I*P;
+return+48*((    s=P)+   48*I   )/(   1<u?   u:   1);}   /*   1977  IOCCC2020*/
+#include/**    Do.Or   do_not   .   There_is_   no_try...   --Yoda**/<stdio.h>
+void/**/b(    double   t,/***   *   **/double   u){double   s=P=B(t)-B(u);(s=P
+*(2*s-P))    <1?m=P=B   ((t+   u)/   2),k   =-   I*P,   m>   -41&&m<39&&9<k&&k
+<48?             m+=k/        2*80+        73,S        [m]=               S[m]
+-73?k%2?S[m]-96?95:73:S[m]-95?96:73:73:1:(b(t,(t+u)/2),b((t+u)/2,u),0);}/*<oo>
+_No.             _I_am_            IOCCC           1977                   ***/
+#include/*****    your   father..   --DarthVader   **/   <time.h>/****   ****/
+int(main)(int    (x),   char**V){;   clock_t(c)=   /*   */clock();;;   for(d=D
+;m<26;m++,s    ++)*s>   63?*d++=m%   7*          16-7   *8,*d++=m/   7*25,*d++
+=*s-64:0;;    if(V[1])   {;;;FILE   *F   =fopen(V[+1],   "r");for   (d=D,L=N=m
+=0;(x=/**             *            ***              **/            fgetc(F))>0
+||fclose(F);)if(x>13?64<x&&x<91?*d++=m*16,*d++=L*25,*d++=x%26:0,m++,0:1)for(++
+L;d-D>N*3||(m=0);N++)D[N*3]-=m*8;}for(;i<200+L*25;i++){for(n=0,p=S+33;n<1920;*
+p++=n++%80>78?10:32){}for(*p=x=0,d=D;x<N;x++,d+=3){O=(d[1]-i-40)*I+*d;n=d[2];p
+=G;for(;n--;)for(;*p++>33;);*a=a[1]=*p++;for(;*p>33;p++)if(*p%2?*a=*p,0:1){a[2
+]=*p;for(m=0;m<3;m++){k=a[m]/2-18;q="/&&&##%%##.+),A$$$$'&&'&&((%-((#'/#%%#&#\
+&&#D&";for(n=2;k--;)n+=*q++-34;X[m]=n%13+n/13*I;}b(0,1);*a=a[1]=*p;}}for(puts(
+s),s=S+30;(clock()-c)*10<i*CLOCKS_PER_SEC;);}return 0;}/*Nevertellmetheodds*/
diff --git a/2020/endoh2/spoiler/spoiler.md b/2020/endoh2/spoiler/spoiler.md
new file mode 100644
index 000000000..79db77191
--- /dev/null
+++ b/2020/endoh2/spoiler/spoiler.md
@@ -0,0 +1,19 @@
+# Opening crawl ROT13 decoder
+
+The program contains dedicated font data for all uppercase alphabet letters.
+
+The source code of the font is [glyphs.txt](glyphs.txt), which is a sequence of
+chunks that is a ASCII code (65-90) followed by points data: `x,y,ctrl`.
+
+If `ctrl` is 1, the point is used as control point for quadratic bezier curve.
+
+[code.c](code.c) is the main logic for the program, which has some placeholders
+for font data and something.
+
+It decompresses the font data and renders a given text by projection.  It
+exploits `C99`'s `double complex` type to represent 2D points, but carefully
+coded so that it does not require any `math.h` functions; you don't have to pass
+`-lm` to `cc`.
+
+[tmpl.txt](tmpl.txt) is a template for the program.  [gen.rb](gen.rb) composes
+the all items and generates [prog.c](prog.c).
diff --git a/2020/endoh2/spoiler/tmpl.txt b/2020/endoh2/spoiler/tmpl.txt
new file mode 100644
index 000000000..6aa5f0b1d
--- /dev/null
+++ b/2020/endoh2/spoiler/tmpl.txt
@@ -0,0 +1,28 @@
+              /* A long time ago in a galaxy far, far away.... */
+
+#############################################################################\
+#############################################################################\
+#############################################################################\
+##########################################################/*Stay_on_target.**/
+########/**/###########/**//*Oh,my_dear_friend.How_I've_missed_you.--C-3PO***/
+##############################################################################
+########            ##        #####        ####        ####       ############
+############    #####   ####   ###   ####   ##   ####   /*   1977  IOCCC2020*/
+########/**    Do.Or   do_not   .   There_is_   no_try...   --Yoda**/#########
+##########    ###### ! ##/***   *   **/###### ! ######### ! ##################
+#########    ########   ####   ###   ####   ##   ####   ##   #################
+####             #####        #####        ####        ####               ####
+########################################################################/*<oo>
+_No.             _I_am_            IOCCC           1977                   ***/
+########/*****    your   father..   --DarthVader   **/   ########/****   ****/
+#############    ####   #########;   ###########   /*   */########;;   #######
+###########    ######   ##########   ##          ####   ##########   #########
+##########    ########   ########   ##   #############   ########   ##########
+######/**             *            ***              **/            ###########
+##############################################################################
+##############################################################################
+##############################################################################
+##############################################################################
+#############################################################################\
+##############################################################################
+#######################################################/*Nevertellmetheodds!*/
diff --git a/thanks-for-fixes.md b/thanks-for-fixes.md
index 901b5d94b..b1e5997a3 100644
--- a/thanks-for-fixes.md
+++ b/thanks-for-fixes.md
@@ -2501,6 +2501,11 @@ debugging it since it works with `-O0`.
 He also added the script [demo.sh](2019/karns/demo.sh) to showcase the entry a
 bit more easily.
 
+## [2020/endoh2](2020/endoh2/prog.c) ([README.md](2020/endoh2/README.md))
+
+Cody copied the files from the spoiler.zip file that was password protected with
+a password that was no longer known from his preview of 2020.
+
 ## [2020/endoh3](2020/endoh3/prog.c) ([README.md](2020/endoh3/README.md))
 
 Cody fixed the script [run_clock.sh](2020/endoh3/run_clock.sh) which gave a