How to test for +/- INFINITY, etc. in C with IEEE

[Tim Smith]

In article <130 at hadron.UUCP> jsdy at hadron.UUCP (Joseph S. D. Yao) writes:
>
>union liffle {		/* long int / float union is a liffle. */
>	long int lf_l;
>	float lf_f;
>};
>const union liffle inf = { 0x7f80000 };	/* initialises 1st elem */
>#define INFINITY (inf.lf_f)

Aren't you jumping the gun a little here?  The above isn't legal yet!

-- 
Tim Smith       sdcrdcf!ism780c!tim || ima!ism780!tim || ihnp4!cithep!tim