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Format fixes in 2020/burton/README.md

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Cody Boone Ferguson committed 2023-04-08 09:03:53 -07:00
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@@ -1,8 +1,8 @@
# Best one-liner # Best one-liner
Dave Burton Dave Burton
<http://snox.net/ioccc> <http://snox.net/ioccc>
Twitter: @lv2jmp Twitter: @lv2jmp
## To build: ## To build:
@@ -38,7 +38,7 @@ NOTE: this entry will crash on no arg specified.
### Alternate code: ### Alternate code:
By default, this code compiles for Little Endian machines. By default, this code compiles for Little Endian machines.
To compile for a Big Engian machine use: To compile for a Big Endian machine use:
```sh ```sh
make alt make alt
@@ -59,7 +59,7 @@ This tiny one-liner is a bit-twiddlers delight! It does all of the work
without looping. without looping.
To understand how it works, a good place to start is to look at the hex To understand how it works, a good place to start is to look at the hex
value that results when the two magic constants are XORed. value that results when the two magic constants are `XOR`ed.
Once you've figured out what happens with one set of constants, how can Once you've figured out what happens with one set of constants, how can
choosing new constants, but using the same computation generate a reversed choosing new constants, but using the same computation generate a reversed
@@ -73,21 +73,22 @@ make test
## Author's comments: ## Author's comments:
Invoke this with a single non-negative integer less than 256, and a useful transformation occurs. Invoke this with a single non-negative integer less than 256, and a useful
transformation occurs.
### Rule 2-ish ### Rule 2-ish:
Exporting the constants B,I,T,S to the makefile allows the code Exporting the constants `B`,`I`,`T`,`S` to the [Makefile](Makefile) allows the
to be compiled for either LE (little-endian) or BE (big-endian) machines(!!), code to be compiled for either LE (little-endian) or BE (big-endian)
so they are truly configuration parameters, not logic. machines(!!), so they are truly configuration parameters, not logic.
### Notes ### Notes:
One <strike>ping</strike> argument only. It will segfault on zero arguments, and One <strike>ping</strike> argument only. It will segfault on zero arguments, and
display strange results if more than one argument. display strange results if more than one argument.
Small, non-negative integers only. Useful range is 0 .. 511, sorta, for LE; 0 .. 255 for BE. Small, non-negative integers only. Useful range is `0 .. 511`, sorta, for LE; `0
Bonus points if you can explain why the limits work this way. .. 255` for BE. Bonus points if you can explain why the limits work this way.
ASCII character set, 64-bit long longs are required. ASCII character set, 64-bit long longs are required.
@@ -95,10 +96,10 @@ v,a,r,i,a,b,l,e,s_NAME the operation.
No loops, no branches?!? No loops, no branches?!?
### Compilation #### Compilation:
Compiles cleanly under `clang -Wall -Weverything -pedantic`, Compiles cleanly under `clang -Wall -Weverything -pedantic`, but you need to add
but you need to add `--include stdio.h --include stdlib.h` for the `printf`(3) and `atoi`(3). `--include stdio.h --include stdlib.h` for the `printf`(3) and `atoi`(3).
On a little-endian machine: On a little-endian machine: