Hello,
This is more a generic Objective-C question versus GNUstep but maybe some
experts here have a suggestion.
I have a bunch of code that looks l like this:
if ([encode isEqual: [BioSwarmModel floatEncode]]) {
// interpret as float matrix
float (*grid)[height][width] = matrix;
for (i = 0;i < height; ++i)
for (j = 0;j < width; ++j)
(*grid)[i][j] = 0.0;
} else if ([encode isEqual: [BioSwarmModel doubleEncode]]) {
// interpret as double matrix
double (*grid)[height][width] = matrix;
for (i = 0;i < height; ++i)
for (j = 0;j < width; ++j)
(*grid)[i][j] = 0.0;
}
where I have a generic pointer void *matrix to some data, that I need to
interpret as a specific data type, generally either int, float or double. The
part I don’t like is that the operation is essentially identical regardless of
the data type, but I have to duplicate code in order to handle it. In this
example, the code is just zero’ing out the data. This can be a pain for more
complicated operations as I have to make sure I do the correct changes to each
code piece. What I would like is just to write the code once and have the
compiler or whatever handle the data type for me:
for (i = 0;i < height; ++i)
for (j = 0;j < width; ++j)
(*grid)[i][j] = 0.0;
So is there some new Objective-C feature that I’m unaware of which can do this
for me?
I know at the C language level, there essentially has to be separate code
generated for each data type. I can do some trickery with C-preprocessor
macros, or #include code snippets but I’ve avoided that at the moment.
cheers
Scott
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