win32: actype/isactype: optimize both to O(1)

The premise, and implementation, is simple: instead of doing string
search in a list of strings for the class name - which is fast for the
first strings in the list but slow for the last strings, use perfect
hash to map the string directly to a potential class to match in O(1).

The switch/case in isactype is also changed to a function table in O(1)
(the compiler might have optimized this switch to O(1) jump-table, but
now we don't leave it to chance).

Two implementations are supported: one which allows testing actype_t
value against specific classes like AC_ALNUM etc, and one which doesn't
allow that (just like wctype/iswctype) and is more efficient.

Since nothing uses specific class matches anymore, default is the more
efficient choice - where actype_t is a function pointer to isalnum etc.

And while at it, also change the enum names CCLASS_ALNUM etc to more
appropriate AC_ALNUM etc, to use the AC "namespace".

0 files changed, 0 insertions, 0 deletions