Салям!
8-Фев-2004 01:28 [EMAIL PROTECTED] (Bart Oldeman) wrote to
[EMAIL PROTECTED]:
>> if (drive == 0)
>> drive = default_drive + 1;
>> drive--;
BO> If you like to save 1 byte, then I can save another one
BO> drive--;
BO> if ((int)drive < 0)
BO> drive = default_drive;
Of course, but I prefer not to cross range boundaries and mix signed
and unsigned types - this is why above I prefer to decrease after, not
before comparision.
Also, this code not equal to original code: it replaces by
default_drive not only value 0, but all vlues with high bit set.
BO> The question is why? Next time the compiler does it all differently than
BO> what we naively expect...
With `drive' as UBYTE my code (both under BCC and WCC) is same in size
(as original) but less jumps; your code is worser.
If I replace your code by "if (--drive == (UBYTE)-1)", then code is
better than yours. :) On the other side, under BCC it longer than my, under
WCC it shorter.
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