RosettaCodeData/Task/URL-decoding/Yabasic/url-decoding.basic

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sub decode_url$(s$)
local res$, ch$
while(s$ <> "")
ch$ = left$(s$, 1)
if ch$ = "%" then
ch$ = chr$(dec(mid$(s$, 2, 2)))
s$ = right$(s$, len(s$) - 3)
else
if ch$ = "+" ch$ = " "
s$ = right$(s$, len(s$) - 1)
endif
res$ = res$ + ch$
wend
return res$
end sub
print decode_url$("http%3A%2F%2Ffoo%20bar%2F")
print decode_url$("google.com/search?q=%60Abdu%27l-Bah%C3%A1")