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Avoid unnecessary string duplication in .urlsafe_decode64 #6

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Merged
hsbt merged 3 commits into from
Sep 25, 2021
+5 −2
Merged

Avoid unnecessary string duplication in .urlsafe_decode64 #6

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8c82ee4
Add Gemfile.lock to .gitgnore
jcmfernandes Sep 24, 2021
37192dc
Out with minitest, in with test-unit
jcmfernandes Sep 24, 2021
6401ef5
Avoid unnecessary string duplication
jcmfernandes Sep 24, 2021
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1 change: 1 addition & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -6,3 +6,4 @@
/pkg/
/spec/reports/
/tmp/
Gemfile.lock
2 changes: 1 addition & 1 deletion Gemfile
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@@ -1,4 +1,4 @@
source "https://rubygems.org"

gem "rake"
gem "minitest"
gem "test-unit"
4 changes: 3 additions & 1 deletion lib/base64.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -99,9 +99,11 @@ def urlsafe_decode64(str)
# NOTE: RFC 4648 does say nothing about unpadded input, but says that
# "the excess pad characters MAY also be ignored", so it is inferred that
# unpadded input is also acceptable.
str = str.tr("-_", "+/")
if !str.end_with?("=") && str.length % 4 != 0
str = str.ljust((str.length + 3) & ~3, "=")
str.tr!("-_", "+/")
else
str = str.tr("-_", "+/")
end
strict_decode64(str)
end
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