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oleibman
30c880b5e6
* Bitwise Functions and 32-bit When running the test suite with 32-bit PHP, a failure was reported in BITLSHIFT. In fact, all of the following are vulnerable to problems, and didn't report any failures only because of a scarcity of tests: - BITAND - BITOR - BITXOR - BITRSHIFT - BITLSHIFT Those last 2 can be resolved fairly easily by using multiplication by a power of 2 rather than shifting. The first 3 are a tougher nut to crack, and I will continue to think how they might best be approached. For now, I have added skippable tests for each of them, which at least documents the problem. Aside from adding many new tests, some bugs were correctd: - The function list in Calculation.php pointed BITXOR to BITOR. - All 5 functions allow null/false/true parameters. - BIT*SHIFT shift amount must be numeric, can be negative, allows decimal portion (which is truncated to integer), and has an absolute value limit of 53. - Because BITRSHIFT allows negative shift amount, its result can overflow (in which case return NAN). - All 5 functions disallow negative parameters (except ...SHIFT second parameter). This was coded, but the code had been thwarted by an earlier is_int test. * Full Support for AND/OR/XOR on 32-bit Previous version did not support operands 2**32 through 2**48.