aparler/RosettaCodeData
1
0
Fork 0
Code Issues 12 Pull requests 3 Projects Releases Packages Wiki Activity Actions

Data commit

Browse source
This commit is contained in:
Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
199093 changed files with 3378972 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

36
Task/URL-decoding/ALGOL-68/url-decoding.alg Normal file
View file

@ -0,0 +1,36 @@
# returns c decoded as a hex digit #
PROC hex value = ( CHAR c )INT: IF c >= "0" AND c <= "9" THEN ABS c - ABS "0"
ELIF c >= "A" AND c <= "F" THEN 10 + ( ABS c - ABS "A" )
ELSE 10 + ( ABS c - ABS "a" )
FI;
# returns the URL encoded string decoded - minimal error handling #
PROC url decode = ( STRING encoded )STRING:
BEGIN
[ LWB encoded : UPB encoded ]CHAR result;
INT result pos := LWB encoded;
INT pos := LWB encoded;
INT max pos := UPB encoded;
INT max encoded := max pos - 3;
WHILE pos <= UPB encoded
DO
IF encoded[ pos ] /= "%" AND pos <= max encoded
THEN
# not a coded character #
result[ result pos ] := encoded[ pos ];
pos +:= 1
ELSE
# have an encoded character #
result[ result pos ] := REPR ( ( 16 * hex value( encoded[ pos + 1 ] ) )
+ hex value( encoded[ pos + 2 ] )
);
pos +:= 3
FI;
result pos +:= 1
OD;
result[ LWB result : result pos - 1 ]
END # url decode # ;
# test the url decode procedure #
print( ( url decode( "http%3A%2F%2Ffoo%20bar%2F" ), newline ) );
print( ( url decode( "google.com/search?q=%60Abdu%27l-Bah%C3%A1" ), newline ) )