"Troy A. Griffitts" wrote:
> ...
> If the list is not sparse then the simplest method for conversion would be
> to make an array.
>
> short jis2unicode = { 1,2,3,4,5,6,7,26,6,23,7,2,7, ...etc for all 7000
> mappings...};
> #DEFINE JIS_OFFSET 0 // whatever the first jis character is
> #DEFINE UNICODE_OFFSET 0 // Just to make the numbers in your list smaller,
> you can set this to the smallest value and make all of the rest of them
> relative to it.
>
> short convertJIS2Unicode(short jischar) {
> return jis2unicode[jischar - JIS_OFFSET] + UNICODE_OFFSET;
> }
>
> This should much smaller than your switch statement. If the JIS list is
> sparse though, then this will be a much bigger array than 7000 shorts.
That is good advice. Chris, i think you'll find that such an arrangement would be
much more compact and give
better performance than either a hash table or an STL map when the main direction of
conversion is from the
shorter, denser encoding to the longer, sparser encoding. The reverse direction would
be slower, but i expect
you'd only need to make such conversions when getting user input for searches and the
like, and the number of
lookups would be small.
Paul
http://paulgear.webhop.net
