On Mon, Jun 29, 2009 at 5:03 PM, Tamas Rudnai <tamas.rudnai@gmail.com>wrote:

> I am not sure if it is mandatory or not but in all C compiler I have seen
> the switch-case was compiled either to series of if..goto or optimised in
> the similar manner, like jump tables or checking range and a goto if there
> was more than one case in series describing an entire range of literals.


Now that I was thinking over of it, it should be mandatory... So as once you
jump into a case C should continue the execution through all case statements
till a break (or the end of the switch). Therefore inside the case there
should be no "if" or "goto" put by the compiler. Hence the

IF ... GOTO CASE1;
IF ... GOTO CASE2;
IF ... GOTO CASE3;

CASE1:
...
..
...
CASE2:
CASE3:
...
...

(or the jump table or equivalent)  assembly structure out of the compiler...
So it should be safe to use these kind of tricks -- might not nice as per
reading the source though.

Tamas
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