Add alt versions to 1991/cdupont
There are three alt versions. One has a comment and an unused goto label removed that are warned against being removed; another has this done and is also beautified (which is also warned against) and the third is one that is just beautified. This involved changing the 's' macro to be '__FILE__' because otherwise it would read in the original code and not show the problem.
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Cody Boone Ferguson committed
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@@ -1,3 +1,6 @@
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cdupont
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cdupont.alt
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cdupont.alt2
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cdupont.alt3
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cdupont.orig
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prog.orig
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@@ -57,7 +57,7 @@ ARCH=
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# Defines that are needed to compile
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#
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CDEFINE= -Ds=\"cdupont.c\" -Dt=\"r\"
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CDEFINE= -Ds=__FILE__ -Dt=\"r\"
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# Include files that are needed to compile
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#
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@@ -111,8 +111,8 @@ OBJ= ${PROG}.o
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DATA=
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TARGET= ${PROG}
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#
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ALT_OBJ=
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ALT_TARGET=
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ALT_OBJ= ${PROG}.alt.o ${PROG}.alt2.o ${PROG}.alt3.o
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ALT_TARGET= ${PROG}.alt ${PROG}.alt2 ${PROG}.alt3
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#################
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@@ -4,6 +4,10 @@
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make all
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```
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There are three alt versions which demonstrate a problem that the code documents
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(as an obfuscation technique) and what the judges document so you can see what
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it looks like. See [alternate code](#alternate-code) below for more details.
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## To use:
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@@ -12,6 +16,38 @@ make all
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```
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## Alternate code:
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These three versions show what will happen if certain things are done that were
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warned against: if you remove a comment and more so an unused `goto` label or if
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you beautify it. The [cdupont.alt.c](cdupont.alt.c) is the one with both the
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unused `goto` label and comments removed, the [cdupont.alt2.c](cdupont.alt2.c)
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is the version that has these things removed and is also beautified and the
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[cdupont.alt3.c](cdupont.alt3.c) is just beautified. This required changing the
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`s` macro to be `__FILE__` as otherwise it would read in the original code which
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doesn't have the modifications.
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### Alternate build:
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```sh
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make alt
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```
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### Alternate try:
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```sh
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./cdupont.alt
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./cdupont.alt2
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./cdupont.alt3
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```
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Enjoy! :-)
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## Judges' remarks:
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Why is the following label necessary?
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@@ -0,0 +1,61 @@
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/* common sense to nohonest programmer */
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#include <stdio.h>
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main ()
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{
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int x, gi = 4, i, f, ri = 1, httxkbl = 1, m = 012;
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long cd = 0x5765248d, n;
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char u[0x50][032];
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FILE *ind;
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ind = fopen (s, t);
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for (i = 0; i < 0x1a; i++)
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{
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goto daswjhkls;
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vhjsgfdy1l1gjhd:;
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}
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/*borntorun.*/ goto c0g0;
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cOgO:i = 0;
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fclose (ind);
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c0gO:
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x = u[gi][m];
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if (m == gi)
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{
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x = 0x70;
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f = 0x68;
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}
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else
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goto cOg0;
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b:putchar (x);
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if (!(n - httxkbl++))
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#define yank(x) putchar(x)
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{
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httxkbl = 1;
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yank (' ');
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goto hxi;
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}
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goto bl;
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daswjhkls:fgets (u[i], 0120, ind);
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/*obfuscated, eh? */ goto
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vhjsgfdy1l1gjhd;
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c0g0:n = cd & 0x40000000L >> 0x1e;
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goto cOgO;
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g6w:
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if (x != 0x2e)
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{
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i++;
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goto c0gO;
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}
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else /*
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injail */
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yank ('\n');
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goto vhjsgfdyl1lgjhd;
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cOg0:
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f = u[m][gi];
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goto b;
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bl:m = (i + 1) * (4 * x + 3 * f) % 032;
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gi = (i + 1) * (x + 2 * f) % 0x1a;
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goto g6w;
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hxi:cd ^= n = cd & (7 << 3 * (014 - ++ri));
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n >>= 3 * (12 - ri);
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goto bl;
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vhjsgfdyl1lgjhd:;
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}
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@@ -0,0 +1,23 @@
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#include <stdio.h>
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main(){int x ,gi=4,i,f,ri=1,httxkbl=1,m=012;long cd=0x5765248d,n;
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char u[0x50][032];FILE *ind;
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ind=fopen(s,t); for(i=0; i<0x1a; i++){goto daswjhkls;vhjsgfdy1l1gjhd:;}
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/*borntorun.*/goto c0g0;cOgO:i=0;fclose(ind);c0gO:
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x= u [gi][m];
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if( m==gi){x=0x70;f=0x68;}else goto cOg0 ; b:putchar(x); if(
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!(n-httxkbl++))
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#define yank(x) putchar(x)
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{httxkbl=1; yank(' ');goto
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hxi;}goto bl;
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daswjhkls: fgets(u[i], 0120, ind);
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/*obfuscated, eh? */goto
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vhjsgfdy1l1gjhd;
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c0g0 : n=cd&0x40000000L>>0x1e;
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goto cOgO; g6w:
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if(x!=0x2e){i++;goto c0gO;}else /*
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injail*/yank('\n');goto vhjsgfdyl1lgjhd;
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cOg0 :
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f=u[m][gi];goto b;bl:m=(i+1)*(4*
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x+3*f)%032;gi=(i+1)*(x+2*f)%0x1a; goto g6w;
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hxi:cd^= n= cd&(7<<3*(014-++ri));
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n >>=3*(12-ri); goto bl;vhjsgfdyl1lgjhd:;}
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@@ -0,0 +1,64 @@
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/* common sense to nohonest programmer */
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#include <stdio.h>
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main ()
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{
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int x, gi = 4, i, f, ri = 1, httxkbl = 1, m = 012;
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long cd = 0x5765248d, n;
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char u[0x50][032];
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FILE *ind;
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ind = fopen (s, t);
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for (i = 0; i < 0x1a; i++)
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{
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goto daswjhkls;
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vhjsgfdy1l1gjhd:;
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}
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/*borntorun.*/ goto c0g0;
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cOgO:i = 0;
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fclose (ind);
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c0gO:
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x = u[gi][m];
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sorryfor_this_unused_but_very_needed_label:
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if (m == gi)
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{
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x = 0x70;
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f = 0x68;
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}
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else
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goto cOg0;
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b:putchar (x);
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if (!(n - httxkbl++))
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#define yank(x) putchar(x)
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{
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httxkbl = 1;
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yank (' ');
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goto hxi;
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}
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goto bl;
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/* hardlyundrstandable, but
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likely to be missed if removed */
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daswjhkls:fgets (u[i], 0120, ind);
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/*obfuscated, eh? */ goto
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vhjsgfdy1l1gjhd;
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c0g0:n = cd & 0x40000000L >> 0x1e;
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goto cOgO;
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g6w:
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if (x != 0x2e)
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{
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i++;
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goto c0gO;
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}
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else /*
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injail */
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yank ('\n');
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goto vhjsgfdyl1lgjhd;
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cOg0:
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f = u[m][gi];
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goto b;
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bl:m = (i + 1) * (4 * x + 3 * f) % 032;
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gi = (i + 1) * (x + 2 * f) % 0x1a;
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goto g6w;
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hxi:cd ^= n = cd & (7 << 3 * (014 - ++ri));
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n >>= 3 * (12 - ri);
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goto bl;
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vhjsgfdyl1lgjhd:;
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}
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@@ -1096,6 +1096,19 @@ him): `k` for forward, `h` for left and `l` for right. This version also has a
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more useful way to exit, just entering `q` followed by enter.
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## [1991/cdupont](1991/cdupont/cdupont.c) ([README.md](1991/cdupont/README.md]))
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Cody provided [three alternate](1991/cdupont/README.md#alternate-code) versions
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that allow one to see what would happen if one were to beautify the program or
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remove a `goto` label or a comment that was in the original code. This required
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changing the `s` macro to be `__FILE__` (which is more reliable anyway) as
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otherwise it would read in the original code and not demonstrate the problem.
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[One version](1991/cdupont/cdupont.alt2.c) has the comments and unused `goto`
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label removed and [the other](1991/cdupont/cdupont.alt.c) has the comments and
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label removed and it is also beautified. The [third
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one](1991/cdupont/cdupont.alt3.c) is just beautified.
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## [1991/davidguy](1991/davidguy/davidguy.c) ([README.md](1991/davidguy/README.md]))
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As some systems like macOS can be particular about not declaring functions Cody
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