Handling 5000 different functionalities - Optimised way in C

[Walter Roberson]

If you know the exact range of possible inputs and they are dense, then
use an array of function pointers.

If you do not know them, or they are sparse, then use a hash table to
locate your function pointer.

As the case labels are known ahead of time, a "perfect hash" could
be used, which in linear time would allow you to calculate an array
offset of the function pointer (or, of a structure that contains
the information needed to construct the function call.).

 

[karthikbg]

Hi,
Thx for directing me to comp.lang.c which had enough info for me for
this particular discussion. Got some good links via this comp.lang.c :

http://groups.google.co.in/group/co...itch+statements&rnum=7&hl=en#f4d17adee79e056d

http://groups.google.co.in/group/co...itch+statements&rnum=1&hl=en#5345f79fea92e437

Regards,
Karthik Balaguru

 

[santosh]

Hi,
Thx for directing me to comp.lang.c which had enough info for me for
this particular discussion. Got some good links via this comp.lang.c :

<snip>

You _are_ in comp.lang.c. In future please quote relevant portions of
the article to which you're replying, since, traditional users of
Usenet may not always have access to articles upthread.