tree a0b5db63f1c7084ff2577134f393a3d39acc5877
parent ab043350525833314b5a2e6d0d2efcd6510a8142
author Gilles Peskine <Gilles.Peskine@arm.com> 1627474806 +0200
committer Gilles Peskine <Gilles.Peskine@arm.com> 1635192552 +0200

Base64 decode: simplify local variables

Document what each local variable does when it isn't obvious from the name.
Don't reuse a variable for different purposes.

This commit has very little impact on the generated code (same code size on
a sample Thumb build), although it does fix a theoretical bug that 2^32
spaces inside a line would be ignored instead of treated as an error.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>