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Diffstat (limited to 'ext/standard/tests/serialize/precision.phpt')
| -rw-r--r-- | ext/standard/tests/serialize/precision.phpt | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/ext/standard/tests/serialize/precision.phpt b/ext/standard/tests/serialize/precision.phpt new file mode 100644 index 0000000..142b2ce --- /dev/null +++ b/ext/standard/tests/serialize/precision.phpt @@ -0,0 +1,49 @@ +--TEST-- +Default precision is sufficient to serialize all the information in floats +--SKIPIF-- +<?php +if (pack('s', 1) != "\x01\x00") + die("skip test for little-endian architectures"); +--FILE-- +<?php + +$numbers = array( + "0000000000000000", //0 + "2d431cebe2362a3f", //.0002 + "2e431cebe2362a3f", //.0002 + 10^-Accuracy[.0002]*1.01 + "0000000000001000", //2^-1022. (minimum normal double) + "0100000000001000", //2^-1022. + 10^-Accuracy[2^-1022.]*1.01 + "ffffffffffffef7f", //2^1024. (maximum normal double) + "feffffffffffef7f", //2^1024. - 10^-Accuracy[2^1024.] + "0100000000000000", //minumum subnormal double + "0200000000000000", //2nd minumum subnormal double + "fffffffffffff000", //maximum subnormal double + "fefffffffffff000", //2nd maximum subnormal double + "0000000000000f7f", //+inf + "0000000000000fff", //-inf +); + +foreach ($numbers as $ns) { + $num = unpack("d", pack("H*", $ns)); $num = reset($num); + echo "number: ", sprintf("%.17e", $num), "... "; + $num2 = unserialize(serialize($num)); + $repr = unpack("H*", pack("d", $num2)); $repr = reset($repr); + if ($repr == $ns) + echo "OK\n"; + else + echo "mismatch\n\twas: $ns\n\tbecame: $repr\n"; +} +--EXPECT-- +number: 0.00000000000000000e+0... OK +number: 2.00000000000000010e-4... OK +number: 2.00000000000000037e-4... OK +number: 2.22507385850720138e-308... OK +number: 2.22507385850720188e-308... OK +number: 1.79769313486231571e+308... OK +number: 1.79769313486231551e+308... OK +number: 4.94065645841246544e-324... OK +number: 9.88131291682493088e-324... OK +number: 3.87340857288933536e-304... OK +number: 3.87340857288933455e-304... OK +number: 1.06293653832877718e+304... OK +number: -1.06293653832877718e+304... OK |