strcalloc_starts() should have tested the return value
of `memcmp` against 0 for equality. Fixed and added a
test case.
As an aside, one might wonder how bugs like that are
creeping into well-tested code imported from other
projects? The answer, specific to stralloc, is that
the original code was very specific to qmail, and used
a number of additional functions specific to qmail.
Rather than import half of qmail, the version imported
into Magicka has been reworked to, instead, use
standard C functions. The process of modifying the
code gave rise to the opportunity for bugs to creep in.
Now that a unit testing framework is in place, we can
test things in isolation more easily and hopefully
catch such things BEFORE they are published to the
master repository.
Signed-off-by: Dan Cross <patchdev@fat-dragon.org>
Lots of code in Magicka is involved in dynamic string manipulation.
`stralloc` isn't a bad library for this sort of thing.
Note that this is complements, but doesn't replace, existing string
utilities.
Signed-off-by: Dan Cross <patchdev@fat-dragon.org>
