Worth going through the effort with Xcode 2.5?
Post: #31
It'll work for longs if you're compiling only a 32-bit binary, but a better solution is to use the types defined in stdint.h (uint32_t, etc.) that are guaranteed to be a particular size regardless of architecture. This way, you don't need to think about having a swap function for a short, an int, and a long, but rather having one for a 16-bit integer, a 32-bit integer, and a 64-bit integer.
Something like this should work:
Something like this should work:
Code:
#define swapInt16(int16) ((((int16) >> 8) & 0x00FF) | \
(((int16) << 8) & 0xFF00))
#define swapInt64(int64) ((((int64) >> 56) & 0x00000000000000FF) | \
(((int64) >> 40) & 0x000000000000FF00) | \
(((int64) >> 24) & 0x0000000000FF0000) | \
(((int64) >> 8) & 0x00000000FF000000) | \
(((int64) << 8) & 0x000000FF00000000) | \
(((int64) << 24) & 0x0000FF0000000000) | \
(((int64) << 40) & 0x00FF000000000000) | \
(((int64) << 56) & 0xFF00000000000000))
Post: #33
Seems to be working for ints of different sizes, thanks. The other issue is floats. I did some searching and found this code from an old iDevGames post:
Which seems to work alright. Any reason why this would not be an advisable method?
Sorry for all the questions, when it comes to things like endianess and byte swapping the graphic designer/non-programmer comes out in me.
Code:
float floatSwap(char *value)
{
char buffer[ 4 ];
buffer[ 0 ] = value[ 3 ];
buffer[ 1 ] = value[ 2 ];
buffer[ 2 ] = value[ 1 ];
buffer[ 3 ] = value[ 0 ];
return *( (float *) &buffer );
}Which seems to work alright. Any reason why this would not be an advisable method?
Sorry for all the questions, when it comes to things like endianess and byte swapping the graphic designer/non-programmer comes out in me.
Post: #34
Should work fine. You could also do a non-converting typecast to uint32_t, swap, then convert back.
Code:
float swapMe;
uint32_t temp;
temp = *(uint32_t *) &swapMe;
swapInt32Big(temp);
swapMe = *(float *) &temp;
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