How to resolve the algorithm URL decoding step by step in the Retro programming language

Published on 12 May 2024 09:40 PM
#Retro

How to resolve the algorithm URL decoding step by step in the Retro programming language

Table of Contents

Problem Statement

This task   (the reverse of   URL encoding   and distinct from   URL parser)   is to provide a function or mechanism to convert an URL-encoded string into its original unencoded form.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm URL decoding step by step in the Retro programming language

Source code in the retro programming language

create buffer 32000 allot

{{
  create bit 5 allot
  : extract  ( $c-$a ) drop @+ bit ! @+ bit 1+ ! bit ;
  : render   ( $c-$n )
    dup '+ = [ drop 32 ] ifTrue
    dup 13 = [ drop 32 ] ifTrue
    dup 10 = [ drop 32 ] ifTrue
    dup '% = [ extract hex toNumber decimal ] ifTrue ;
  :  (  $-$  ) repeat @+ 0; render ^buffer'add again ;
---reveal---
  : decode   (  $-   ) buffer ^buffer'set  drop ;
}}

"http%3A%2F%2Ffoo%20bar%2F" decode buffer puts

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