From 94907339fc9855b7261448f370a308b557334f55 Mon Sep 17 00:00:00 2001
From: Cody Boone Ferguson <53008573+xexyl@users.noreply.github.com>
Date: Sat, 1 Apr 2023 10:59:51 -0700
Subject: [PATCH] Explain magic of 1994/schnitzi in bugs.md

Since the entry cannot yet compile if it's changed to use fgets() I
decided to take a look at the source. Quite quickly I noticed something
fun at the top. If you look at each column and go down row by row you
see it spelling out the code! I wrote the following tips in the bugs.md
as an example:

    Take a look at the interesting comment as well as the `int
    r=0,x,y=0` at the top of the file. If you look at each column go
    down that column you can see how it spells out the code. For
    instance the first column looks like:

	i
	n
	c
	l
	u
	d
	e

	<
	s
	t
	d
	i
	o
	.
	h
	>

    If you join the lines you end up with:

	#include <stdio.h>

    If you look at column 25 which is the end of the word 'mh111' and
    you go down to the next row you'll see a 0 and if you go one row
    down another 0. This is the buffer size, 100, for `u`. The column to
    the left is the same for the `t` variable.

    Thus it seems that in order to get the generated output correct one
    needs to provide the correct input in comments or possibly by
    rearranging some of the code (this was required to make the
    generated code compile at all when changing the buffer size).

From this it should be possible, theoretically, to come up with the
right code so that everything works okay.
---
 bugs.md | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/bugs.md b/bugs.md
index 8936638e8..05eddac92 100644
--- a/bugs.md
+++ b/bugs.md
@@ -453,6 +453,63 @@ this simply does not work with them. Can you help us?
 
 # 1994
 
+## [1994/schnitzi](1994/schnitzi.c) ([README.md])(1994/schnitzi/README.md))
+## STATUS: uses gets() - change to fgets() if possible
+
+The original buffer size of this entry is 100 which is very easily overflowed
+with `gets()` which it uses. [Cody Boone
+Ferguson](/winners.html#Cody_Boone_Ferguson) changed the buffer size to 10000
+but he notes a problem in that this does not translate to the generated source
+file (when feeding the source itself). With `fgets()` it generates compiler
+errors. Without special care with changing the buffer size it would also
+generate compiler errors. Cody explains the magic below which might be used to
+change this entry to fgets() (and he'll be working on it in the coming days most
+likely).
+
+### The magic of the entry
+
+Take a look at the interesting comment as well as the `int r=0,x,y=0` at the top
+of the file. If you look at each column go down that column you can see how it
+spells out the code. For instance the first column looks like:
+
+
+```
+i
+n
+c
+l
+u
+d
+e
+ 
+<
+s
+t
+d
+i
+o
+.
+h
+>
+```
+
+If you join the lines you end up with:
+
+
+```c
+#include <stdio.h>
+```
+
+If you look at column 25 which is the end of the word 'mh111' and you go down to
+the next row you'll see a 0 and if you go one row down another 0. This is the
+buffer size, 100, for `u`. The column to the left is the same for the `t`
+variable.
+
+Thus it seems that in order to get the generated output correct one needs to
+provide the correct input in comments or possibly by rearranging some of the
+code (this was required to make the generated code compile at all when changing
+the buffer size).
+
 
 # 1995